<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>8629</id>
    <completedYear/>
    <publishedYear>2025</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>9</pageNumber>
    <edition/>
    <issue>4</issue>
    <volume>4</volume>
    <type>article</type>
    <publisherName>The Electrochemical Society</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Application of the Hull Cell for Identifying Electropolishing Parameters to Adjust Surface Morphology in Additive Manufacturing</title>
    <abstract language="eng">Additively processed materials are increasingly used to manufacture customized parts, e.g. medical implants. Implant surfaces often require a smooth finish, which can be achieved by post-processing and well-defined process parameters. In this study, the effects of electropolishing of metal parts produced by laser powder bed fusion are investigated using Hull cell experiments and a three-electrode setup. Current density voltage curves were measured with the three-electrode setup to identify the regimes for electropolishing. Subsequently different constant-currents were applied and Hull cell experiments were conducted. The surface roughness (Sz, Sa) and the mass removal were analysed. Surface morphologies were assessed using laser scanning and scanning electron microscopy. A reduction of the initial surface roughness of more than 90% to Sa &amp;lt; 0.3 μm has been achieved. Considering the passed electrical charge during electropolishing, results from Hull cell experiments are systematically correlated with current-controlled electropolishing. This approach enables the precise tailoring of polishing parameters to achieve surfaces with defined roughness. Furthermore, the study demonstrates the suitability of Hull cells in determining electropolishing parameters for additive materials and highlights their contribution to post-processing in additive manufacturing.</abstract>
    <parentTitle language="eng">ECS Advances</parentTitle>
    <identifier type="issn">2754-2734</identifier>
    <identifier type="doi">10.1149/2754-2734/ae184f</identifier>
    <identifier type="urn">urn:nbn:de:bvb:898-opus4-86295</identifier>
    <note>Corresponding author der OTH Regensburg: Lukas Esper</note>
    <enrichment key="opus_doi_flag">true</enrichment>
    <enrichment key="local_crossrefDocumentType">journal-article</enrichment>
    <enrichment key="local_import_origin">crossref</enrichment>
    <enrichment key="local_doiImportPopulated">PersonAuthorFirstName_1,PersonAuthorLastName_1,PersonAuthorIdentifierOrcid_1,PersonAuthorFirstName_2,PersonAuthorLastName_2,PersonAuthorIdentifierOrcid_2,PersonAuthorFirstName_3,PersonAuthorLastName_3,PersonAuthorIdentifierOrcid_3,PersonAuthorFirstName_4,PersonAuthorLastName_4,PersonAuthorIdentifierOrcid_4,PersonAuthorFirstName_5,PersonAuthorLastName_5,PersonAuthorIdentifierOrcid_5,PublisherName,TitleMain_1,TitleAbstract_1,TitleParent_1,ArticleNumber,Issue,Volume,CompletedYear,IdentifierIssn,Enrichmentlocal_crossrefLicence</enrichment>
    <enrichment key="Kostentraeger">Labor für Werkstoffrandschichtanalytik</enrichment>
    <enrichment key="BegutachtungStatus">peer-reviewed</enrichment>
    <enrichment key="opus.source">doi-import</enrichment>
    <enrichment key="CorrespondingAuthor">Lukas Esper</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">true</enrichment>
    <licence>Creative Commons - CC BY - Namensnennung 4.0 International</licence>
    <author>Lukas Esper</author>
    <author>Ulrich Schultheiss</author>
    <author>Marius Grad</author>
    <author>Ulf Noster</author>
    <author>Andreas Bund</author>
    <collection role="institutes" number="FAKMB">Fakultät Maschinenbau</collection>
    <collection role="oaweg" number="">Gold Open Access- Erstveröffentlichung in einem/als Open-Access-Medium</collection>
    <collection role="oaweg" number="">Corresponding author der OTH Regensburg</collection>
    <collection role="institutes" number="TCParsberg">Technologie-Campus Parsberg-Lupburg</collection>
    <collection role="DFGFachsystematik" number="1">Ingenieurwissenschaften</collection>
    <collection role="othforschungsschwerpunkt" number="">Materialien und Produktion</collection>
    <thesisPublisher>Ostbayerische Technische Hochschule Regensburg</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-oth-regensburg/files/8629/Esper_2025_ECS_Adv._4_042501.pdf</file>
  </doc>
  <doc>
    <id>8503</id>
    <completedYear/>
    <publishedYear>2025</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>11</pageNumber>
    <edition/>
    <issue>1</issue>
    <volume>3104</volume>
    <type>conferenceobject</type>
    <publisherName>IOP Publishing</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Face-wise prediction of sheet-metal drawability using graph neural networks</title>
    <abstract language="eng">The early design phase of deep-drawn structural components involves time-consuming iterative development. Traditional drawability assessments rely on finite element simulations, which are computationally expensive and slow the design process. Alternative machine learning (ML) approaches show promise in accelerating this process but face challenges with existing methods. Existing low-dimensional ML models only provide global predictions without identifying specific geometric regions prone to failure. High-dimensional models provide local predictions but require significant amounts of training data. We propose a data-driven approach leveraging graph neural networks (GNNs) for face-wise drawability prediction of sheet metal components in their computer-aided design (CAD) representation. Our method aims to bridge the gap between the computational efficiency of ML and the spatial resolution of simulation by providing face-wise insight into potential failure regions. This study utilises a dataset of parametric U-channel geometries with variability in both geometry and topology. Ground-truth labels are generated using inverse analysis simulations. Geometric entities are represented through the use of UV parameterisations, whereby 3D surfaces are mapped into 2D space to facilitate geometric encoding. Concurrently, the topological relationships are captured using a face adjacency graph. To address data scarcity, we evaluate how different amounts of training data affect model performance and perform ablation studies to analyse the impact of different CAD representation features. Our results show that the proposed approach achieves high accuracy even with limited training data. In addition, the ablation studies provide insights into the most critical CAD features, guiding future research. These results highlight the potential of our GNN to predict face-wise drawability in the early design phase.</abstract>
    <parentTitle language="eng">Journal of Physics: Conference Series</parentTitle>
    <identifier type="issn">1742-6588</identifier>
    <identifier type="doi">10.1088/1742-6596/3104/1/012053</identifier>
    <note>Corresponding author der OTH Regensburg: Philipp Stocker</note>
    <enrichment key="opus_doi_flag">true</enrichment>
    <enrichment key="local_crossrefDocumentType">journal-article</enrichment>
    <enrichment key="local_import_origin">crossref</enrichment>
    <enrichment key="ConferenceStatement">The 13th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes, 7.-11. July 2025, Munich</enrichment>
    <enrichment key="BegutachtungStatus">peer-reviewed</enrichment>
    <enrichment key="opus.source">doi-import</enrichment>
    <enrichment key="CorrespondingAuthor">Philipp Stocker</enrichment>
    <licence>Creative Commons - CC BY - Namensnennung 4.0 International</licence>
    <author>Philipp Stocker</author>
    <author>Tobias Lehrer</author>
    <author>Fabian Duddeck</author>
    <author>Marcus Wagner</author>
    <collection role="institutes" number="FAKMB">Fakultät Maschinenbau</collection>
    <collection role="oaweg" number="">Gold Open Access- Erstveröffentlichung in einem/als Open-Access-Medium</collection>
    <collection role="oaweg" number="">Corresponding author der OTH Regensburg</collection>
    <collection role="DFGFachsystematik" number="1">Ingenieurwissenschaften</collection>
    <collection role="othforschungsschwerpunkt" number="">Digitale Transformation</collection>
  </doc>
  <doc>
    <id>8781</id>
    <completedYear/>
    <publishedYear>2025</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>161</pageFirst>
    <pageLast>170</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>274</volume>
    <type>conferenceobject</type>
    <publisherName>Elsevier</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Simulation-Based Digital Twins for Internal Transport Systems</title>
    <abstract language="eng">The increasing complexity of internal transport systems in industrial applications poses significant challenges for operational decision-making. This paper presents a simulation-based Digital Twin framework developed within the research project TwinTraSys to support the control of such systems. The framework is specifically tailored to the constraints of real-world IT infrastructures, requiring minimal transaction data, while enabling predictive analysis and dynamic scenario evaluation. It consists of a modular architecture divided into four core components: data provision, data preparation, simulation, and decision support. A dedicated simulation framework enables the automated generation of structural models and the integration of real-world operational control systems. The proposed approach has been validated in industrial settings and has demonstrated its ability to support resource planning and transport resource allocation through simulation-based experimentation and multi-criteria evaluation. This paper contributes to the practical advancement of Digital Twin applications in intralogistics by bridging the gap between theoretical models and real-world constraints.</abstract>
    <parentTitle language="eng">Procedia Computer Science</parentTitle>
    <identifier type="doi">10.1016/j.procs.2025.12.016</identifier>
    <note>Corresponding author der OTH Regensburg: Stefan Galka</note>
    <enrichment key="CorrespondingAuthor">Stefan Galka</enrichment>
    <enrichment key="ConferenceStatement">37th European Modeling &amp; Simulation Symposium (EMSS 2025), held within the 22 nd International Multidisciplinary Modeling &amp; Simulation Multiconference (I3M 2025)</enrichment>
    <enrichment key="BegutachtungStatus">peer-reviewed</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <licence>Creative Commons - CC BY-NC-ND - Namensnennung - Nicht kommerziell - Keine Bearbeitungen 4.0 International</licence>
    <author>Stefan Galka</author>
    <author>Sebastian Meißner</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Digital Twin</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Intralogistics</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Logistics</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Operational Control</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Simulation</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Simulation-based Decision Support</value>
    </subject>
    <collection role="institutes" number="FAKMB">Fakultät Maschinenbau</collection>
    <collection role="oaweg" number="">Gold Open Access- Erstveröffentlichung in einem/als Open-Access-Medium</collection>
    <collection role="oaweg" number="">Corresponding author der OTH Regensburg</collection>
    <collection role="institutes" number="">Innovationszentrum für Produktionslogistik und Fabrikplanung (IPF)</collection>
    <collection role="DFGFachsystematik" number="1">Ingenieurwissenschaften</collection>
    <collection role="othforschungsschwerpunkt" number="">Materialien und Produktion</collection>
  </doc>
  <doc>
    <id>8761</id>
    <completedYear/>
    <publishedYear>2026</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>20</pageNumber>
    <edition/>
    <issue/>
    <volume/>
    <type>article</type>
    <publisherName>Springer</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Development of a continuous fiber-reinforced 3D printing process with a 6-axis robot arm: Process design and equipment</title>
    <abstract language="eng">The utilisation of 3D printing processes in the fabrication of continuous fiber-reinforced composites confers a multitude of advantages, in particular flexible design based on structural requirements. In order to achieve greater flexibility, there is a necessity for 3D printing systems that allow for customisable material selection and fiber positioning. This paper presents the design of a robot-based 3D printing system that incorporates an in-situ impregnation line and flexibility regarding the machine code generation for fiber positioning. The development of the system enabled the attainment of an average fiber volume content of up to 37.12%. In the tensile tests, material characteristics up to E1 = 24.7 GPa and strength of up to RM1 = 0.51 GPa were determined.</abstract>
    <parentTitle language="eng">The International Journal of Advanced Manufacturing Technology</parentTitle>
    <identifier type="issn">0268-3768</identifier>
    <identifier type="doi">10.1007/s00170-025-17263-3</identifier>
    <note>Corresponding author der OTH Regensburg: Anna Afanasev</note>
    <enrichment key="opus_doi_flag">true</enrichment>
    <enrichment key="opus_import_data">{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,4]],"date-time":"2026-01-04T02:59:26Z","timestamp":1767495566373,"version":"3.48.0"},"reference-count":53,"publisher":"Springer Science and Business Media LLC","license":[{"start":{"date-parts":[[2026,1,4]],"date-time":"2026-01-04T00:00:00Z","timestamp":1767484800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2026,1,4]],"date-time":"2026-01-04T00:00:00Z","timestamp":1767484800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"name":"Ostbayerische Technische Hochschule Regensburg"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Int J Adv Manuf Technol"],"DOI":"10.1007\/s00170-025-17263-3","type":"journal-article","created":{"date-parts":[[2026,1,4]],"date-time":"2026-01-04T02:56:49Z","timestamp":1767495409000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Development of a continuous fiber-reinforced 3D printing process with a 6-axis robot arm: Process design and equipment"],"prefix":"10.1007","author":[{"ORCID":"https:\/\/orcid.org\/0009-0000-7391-6595","authenticated-orcid":false,"given":"Anna","family":"Afanasev","sequence":"first","affiliation":[]},{"given":"Philipp","family":"H\u00f6fer","sequence":"additional","affiliation":[]},{"given":"Jens","family":"Holtmannsp\u00f6tter","sequence":"additional","affiliation":[]},{"given":"Felix","family":"Zimmer","sequence":"additional","affiliation":[]},{"given":"Ingo","family":"Ehrlich","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2026,1,4]]},"reference":[{"key":"17263_CR1","doi-asserted-by":"publisher","unstructured":"Judenmann A, H\u00f6fer P, Holtmannsp\u00f6tter J et al (2023) Additive manufacturing of continuous fiber-reinforced composites. In: Rieser, J, Endress, F, Horoschenkoff, A, H\u00f6fer, P, Dickhut, T, Zimmermann, M (eds) Proceedings of the Munich symposium on lightweight design 2022, pp 15\u201327. https:\/\/doi.org\/10.1007\/978-3-031-33758-1_2","DOI":"10.1007\/978-3-031-33758-1_2"},{"key":"17263_CR2","doi-asserted-by":"publisher","first-page":"1041","DOI":"10.1007\/s00170-022-09983-7","volume":"122","author":"S Miri","year":"2022","unstructured":"Miri S, Kalman J, Canart J et al (2022) Tensile and thermal properties of low-melt poly aryl ether ketone reinforced with continuous carbon fiber manufactured by robotic 3d printing. Int J Adv Manuf Technol 122:1041\u20131053. https:\/\/doi.org\/10.1007\/s00170-022-09983-7","journal-title":"Int J Adv Manuf Technol"},{"key":"17263_CR3","doi-asserted-by":"publisher","first-page":"2189","DOI":"10.1007\/s40964-024-00568-2","volume":"9","author":"S Olcun","year":"2024","unstructured":"Olcun S, Elkholy A, Kempers R (2024) High thermal conductivity continuous pitch carbon fiber 3d printed using a 6-axis robot arm. Prog Addit Manuf 9:2189\u20132198. https:\/\/doi.org\/10.1007\/s40964-024-00568-2","journal-title":"Prog Addit Manuf"},{"key":"17263_CR4","doi-asserted-by":"publisher","unstructured":"Ipekci A, Ekici B (2021) Experimental and statistical analysis of robotic 3d printing process parameters for continuous fiber reinforced composites. J Compos Mater 55(19). https:\/\/doi.org\/10.1177\/0021998321996425","DOI":"10.1177\/0021998321996425"},{"key":"17263_CR5","doi-asserted-by":"publisher","unstructured":"Backer WD, van Tooren M, Bergs A (2018) Multi-axis multi-material fused filament fabrication with continuous fiber reinforcement. 2018 AIAA\/ASCE\/AHS\/ASC structures, structural dynamics and materials conference. https:\/\/doi.org\/10.2514\/6.2018-0091","DOI":"10.2514\/6.2018-0091"},{"key":"17263_CR6","unstructured":"Gardiner G (2023) Demonstrating functionalized, cost-effective composites using additive extrusion. https:\/\/www.compositesworld.com\/articles\/demonstrating-functionalized-cost-effective-composites-using-additive-extrusion"},{"key":"17263_CR7","unstructured":"Fill Gesellschaft mbH (2025) Additive manufacturing. https:\/\/www.fill.co.at\/de\/produkte\/additive-manufacturing"},{"key":"17263_CR8","unstructured":"Titze M, Grohmann Y, Opitz S et al (eds) (2020) 3D-gedruckte CFK-Bauteile - Eine neue Impr\u00e4gniertechnologie senkt die Kosten. DLR - Institut f\u00fcr Faserverbundleichtbau und Adaptronik, Braunschweig. https:\/\/www.dlr.de\/de\/sy\/medien\/publikationen\/innovationsberichte\/innovationsbericht-2020.pdf"},{"key":"17263_CR9","unstructured":"Kunze E, Faust J, Geller S et al (2022) Additive fertigung mit endlosfaserverst\u00e4rkung und duroplastischer matrix. 3. Fachtagung werkstoffe und additive fertigung. https:\/\/dgm.inventum.de\/app\/medialibrary\/show\/eventItem\/2f3fcf19-f880-4fcc-a035-924848c0d83c"},{"key":"17263_CR10","unstructured":"DLR Institut f\u00fcr Faserverbundleichtbau und Adaptronik (2022) How can 3d printing technologies for processing endless fibre reinforced materials be assessed in practice? https:\/\/www.dlr.de\/fa\/"},{"key":"17263_CR11","doi-asserted-by":"publisher","unstructured":"Liu G, Xiong Y, Zhou L (2021) Additive manufacturing of continuous fiber reinforced polymer composites: Design opportunities and novel applications. Compos Commun 27. https:\/\/doi.org\/10.1016\/j.coco.2021.100907","DOI":"10.1016\/j.coco.2021.100907"},{"key":"17263_CR12","doi-asserted-by":"publisher","unstructured":"Zheng H, Zhu S, Chen L et al (2025) 3d printing continuous fiber reinforced polymers: a review of material selection, process, and mechanics-function integration for targeted applications. Polymers 17. https:\/\/doi.org\/10.3390\/polym17121601","DOI":"10.3390\/polym17121601"},{"key":"17263_CR13","unstructured":"Continuous Composites (2025) Cf3d. https:\/\/www.continuouscomposites.com\/technology"},{"key":"17263_CR14","unstructured":"9TLabs (2023) Red series\u00aeadditive fusion solution. https:\/\/www.9tlabs.com\/hardware"},{"key":"17263_CR15","unstructured":"Markforged (2024) Mark two desktop 3d printer. https:\/\/markforged.com\/de\/3d-printers\/mark-two"},{"key":"17263_CR16","doi-asserted-by":"publisher","unstructured":"Jung JY, Yu S, Kim H et al (2025) Process-structure-property study of 3d-printed continuous fiber reinforced composites. Compos A 188. https:\/\/doi.org\/10.1016\/j.compositesa.2024.108538","DOI":"10.1016\/j.compositesa.2024.108538"},{"key":"17263_CR17","doi-asserted-by":"publisher","unstructured":"Sanei SHR, Popescu D et al (2020) 3d-printed carbon fiber reinforced polymer composites: a systematic review. J Compos Sci 4(3):98. https:\/\/doi.org\/10.3390\/jcs4030098","DOI":"10.3390\/jcs4030098"},{"key":"17263_CR18","doi-asserted-by":"publisher","unstructured":"Tuli NT, Khatun S, Rashid AB (2024) Unlocking the future of precision manufacturing: a comprehensive exploration of 3d printing with fiber-reinforced composites in aerospace, automotive, medical, and consumer industries. Heliyon 10. https:\/\/doi.org\/10.1016\/j.heliyon.2024.e27328","DOI":"10.1016\/j.heliyon.2024.e27328"},{"key":"17263_CR19","doi-asserted-by":"publisher","first-page":"146","DOI":"10.1016\/j.addma.2017.06.004","volume":"16","author":"AN Dickson","year":"2017","unstructured":"Dickson AN, Barry JN, McDonnell KA et al (2017) Fabrication of continuous carbon, glass and Kevlar fibre reinforced polymer composites using additive manufacturing. Addit Manuf 16:146\u2013152. https:\/\/doi.org\/10.1016\/j.addma.2017.06.004","journal-title":"Addit Manuf"},{"key":"17263_CR20","doi-asserted-by":"publisher","unstructured":"Jiang D, Hoglund R, Smith DE (2019) Continuous fiber angle topology optimization for polymer composite deposition additive manufacturing applications. Fibers 7(14). https:\/\/doi.org\/10.3390\/fib7020014","DOI":"10.3390\/fib7020014"},{"key":"17263_CR21","doi-asserted-by":"publisher","first-page":"217","DOI":"10.1016\/j.compstruct.2018.06.020","volume":"201","author":"J Lee","year":"2018","unstructured":"Lee J, Kim D, Nomura T et al (2018) Topology optimization for continuous and discrete orientation design of functionally graded fiber-reinforced composite structures. Compos Struct 201:217\u2013233. https:\/\/doi.org\/10.1016\/j.compstruct.2018.06.020","journal-title":"Compos Struct"},{"key":"17263_CR22","doi-asserted-by":"publisher","unstructured":"Papapetrou VS, Patel C, Tamijani AY (2020) Stiffness-based optimization framework for the topology and fiber paths of continuous fiber composites. Compos B 183. https:\/\/doi.org\/10.1016\/j.compositesb.2019.107681","DOI":"10.1016\/j.compositesb.2019.107681"},{"key":"17263_CR23","doi-asserted-by":"publisher","unstructured":"Huang Y, Tian X, Zheng Z et al (2022) Multiscale concurrent design and 3d printing of continuous fiber reinforced thermoplastic composites with optimized fiber trajectory and topological structure. Compos Struct (285). https:\/\/doi.org\/10.1016\/j.compstruct.2022.115241","DOI":"10.1016\/j.compstruct.2022.115241"},{"key":"17263_CR24","unstructured":"SWMS (2025) Software for large-format additive manufacturing. https:\/\/caesa.de"},{"key":"17263_CR25","unstructured":"Tiemann L (2022) Slicing methods and resulting layers for 3d printing. https:\/\/www.swms.de\/caesa\/layers-and-slicing"},{"key":"17263_CR26","unstructured":"AiBuild (2022) Aisync. https:\/\/ai-build.com\/"},{"key":"17263_CR27","unstructured":"Siemens Digital Industries Software (2025) Machine connectivity - maximize your 3d printing hardware investment with direct printing. https:\/\/plm.sw.siemens.com\/en-US\/nx\/manufacturing\/additive-manufacturing\/am-machine-connectivity"},{"key":"17263_CR28","unstructured":"Robert McNeel &amp; Associates (2023) Rhino 7. https:\/\/www.rhino3d.com\/7\/"},{"key":"17263_CR29","unstructured":"Robots in Architecture Research UG (2022) Kuka \u2014 prc. https:\/\/robotsinarchitecture.com"},{"key":"17263_CR30","volume-title":"Experimental and simulative analysis of the impregnation mechanics of endless fiber rovings","author":"A Miaris","year":"2012","unstructured":"Miaris A (2012) Experimental and simulative analysis of the impregnation mechanics of endless fiber rovings. Institut f\u00fcr Verbundwerkstoffe GmbH, Kaiserslautern"},{"key":"17263_CR31","doi-asserted-by":"publisher","unstructured":"Wilhelm F, Strau\u00df S, Weigant R et al (2020) Effect of power ultrasonic on the expansion of fiber strands. J Compos Sci 4(50). https:\/\/doi.org\/10.3390\/jcs4020050","DOI":"10.3390\/jcs4020050"},{"key":"17263_CR32","unstructured":"Titze M, Rege M, Riemenschneider J et al (eds) (2020) New technique for impregnating rovings with highly viscous melts. Bremen. https:\/\/elib.dlr.de\/137053"},{"key":"17263_CR33","unstructured":"Titze M, K\u00fchnast F, Rege M et al (eds) (2021) Production of continuous fiber reinforced 3D printing filaments using ultrasound. Sampe Europe, Baden\/Z\u00fcrich. https:\/\/elib.dlr.de\/145386"},{"issue":"5\u20136","key":"17263_CR34","doi-asserted-by":"publisher","first-page":"663","DOI":"10.1016\/S1359-835X(97)00109-7","volume":"29","author":"RJ Gaymans","year":"1998","unstructured":"Gaymans RJ, Wevers E (1998) Impregnation of a glass fibre roving with a polypropylene melt in a pin assisted process. Compos A Appl Sci Manuf 29(5\u20136):663\u2013670. https:\/\/doi.org\/10.1016\/S1359-835X(97)00109-7","journal-title":"Compos A Appl Sci Manuf"},{"key":"17263_CR35","unstructured":"Weustink APD (2008) Development of a rapid thermoplastic impregnation device. Dissertation, Technische Universiteit Delft, [S.l.]"},{"issue":"4","key":"17263_CR36","doi-asserted-by":"publisher","first-page":"126","DOI":"10.1016\/j.compositesa.2015.01.007","volume":"71","author":"ND Polychronopoulos","year":"2015","unstructured":"Polychronopoulos ND, Papathanasiou TD (2015) Pin-assisted resin infiltration of porous substrates. Compos A Appl Sci Manuf 71(4):126\u2013135. https:\/\/doi.org\/10.1016\/j.compositesa.2015.01.007","journal-title":"Compos A Appl Sci Manuf"},{"issue":"2","key":"17263_CR37","doi-asserted-by":"publisher","first-page":"167","DOI":"10.1533\/9780857093134.183","volume":"17","author":"P Nygard","year":"2004","unstructured":"Nygard P, Gustafson CG (2004) Continuous glass fiber-polypropylene composites made by melt impregnation: Influence of processing method. J Thermoplast Compos Mater 17(2):167\u2013184. https:\/\/doi.org\/10.1533\/9780857093134.183","journal-title":"J Thermoplast Compos Mater"},{"issue":"4","key":"17263_CR38","doi-asserted-by":"publisher","first-page":"276","DOI":"10.1177\/089270579901200403","volume":"12","author":"PJ Bates","year":"1999","unstructured":"Bates PJ, Charrier JM (1999) Effect of process parameters on melt impregnation of glass roving. J Thermoplast Compos Mater 12(4):276\u2013296. https:\/\/doi.org\/10.1177\/089270579901200403","journal-title":"J Thermoplast Compos Mater"},{"issue":"8","key":"17263_CR39","doi-asserted-by":"publisher","first-page":"1100","DOI":"10.1177\/002199839202600802","volume":"26","author":"BR Gebart","year":"1992","unstructured":"Gebart BR (1992) Permeability of unidirectional reinforcements for rtm. J Compos Mater 26(8):1100\u20131133. https:\/\/doi.org\/10.1177\/002199839202600802","journal-title":"J Compos Mater"},{"issue":"11","key":"17263_CR40","doi-asserted-by":"publisher","first-page":"731","DOI":"10.1177\/0731684412444652","volume":"31","author":"R Wang","year":"2012","unstructured":"Wang R, Yang F, Hao L et al (2012) Optimizing processing parameters of pin-assisted-melt impregnation of fiber-reinforced plastics by numerical simulation. J Reinf Plast Compos 31(11):731\u2013737. https:\/\/doi.org\/10.1177\/0731684412444652","journal-title":"J Reinf Plast Compos"},{"key":"17263_CR41","unstructured":"The MathWorks Inc. (2022) Matlab. https:\/\/de.mathworks.com"},{"key":"17263_CR42","unstructured":"R&amp;G Faserverbundwerkstoffe GmbH (2023) Glass fiber roving vetrotex p185-ec14-2400 tex technical data. https:\/\/www.r-g.de\/art\/205110"},{"key":"17263_CR43","unstructured":"Formlabs (2016) Formlabs clear data sheet. https:\/\/formlabs-media.formlabs.com\/datasheets\/1801089-TDS-DE-0P.pdf"},{"key":"17263_CR44","unstructured":"Mark GT, Gozdz AS (2016) Three dimensional printing of composite reinforced structures. https:\/\/patentimages.storage.googleapis.com\/fc\/86\/4f\/16b60f29064f1b\/US20160144566A1.pdf"},{"key":"17263_CR45","unstructured":"Mark GT, Gozdz AS (2017) Three dimensional printing. https:\/\/patentimages.storage.googleapis.com\/38\/25\/e9\/a5edc2fcaa0f88\/US10076876.pdf"},{"key":"17263_CR46","unstructured":"Tyler K (2014) Method and apparatus for continuous composite three-dimensional printing. https:\/\/patentimages.storage.googleapis.com\/f1\/0c\/7e\/8f300ba7825c74\/US20140061974A1.pdf"},{"key":"17263_CR47","unstructured":"DIN 8582:2003-09 (2003) Manufacturing processes forming - classification; subdivision, terms and definitions, alphabetical index. German standard, Beuth Verlag GmbH, Berlin. https:\/\/www.beuth.de\/de\/norm\/din-8582\/65028536"},{"issue":"3\u20134","key":"17263_CR48","doi-asserted-by":"publisher","first-page":"208","DOI":"10.1016\/0956-7143(91)90142-4","volume":"2","author":"FN Cogswell","year":"1991","unstructured":"Cogswell FN (1991) The experience of thermoplastic structural composites during processing. Compos Manuf 2(3\u20134):208\u2013216. https:\/\/doi.org\/10.1016\/0956-7143(91)90142-4","journal-title":"Compos Manuf"},{"key":"17263_CR49","unstructured":"Beresheim G (2002) Thermoplast-tapelegen - ganzheitliche prozessanalyse und -entwicklung. Dissertation, Universit\u00e4t Kaiserslautern, Kaiserslautern. https:\/\/kluedo.ub.rptu.de\/frontdoor\/deliver\/index\/docId\/5549\/file\/Gesamt+Diss+Beresheim+Kluedoversion.pdf"},{"key":"17263_CR50","doi-asserted-by":"publisher","first-page":"93","DOI":"10.1016\/j.addma.2018.09.019","volume":"24","author":"R Matsuzaki","year":"2018","unstructured":"Matsuzaki R, Nakamura T, Sugiyama K et al (2018) Effects of set curvature and fiber bundle size on the printed radius of curvature by a continuous carbon fiber composite 3d printer. Addit Manuf 24:93\u2013102. https:\/\/doi.org\/10.1016\/j.addma.2018.09.019","journal-title":"Addit Manuf"},{"key":"17263_CR51","unstructured":"DIN EN ISO 1172 (2011) Textile-glass-reinforced plastics - Prepregs, moulding compounds and laminates - Determination of the textile-glass and mineral-filler content; calcination methods (ISO 1172:1996). German standard, Beuth Verlag GmbH, Berlin. https:\/\/www.din.de\/de\/mitwirken\/normenausschuesse\/fnk\/veroeffentlichungen\/wdc-beuth:din21:9486458"},{"key":"17263_CR52","doi-asserted-by":"publisher","first-page":"537","DOI":"10.1016\/j.compstruct.2017.11.052","volume":"185","author":"J Justo","year":"2018","unstructured":"Justo J, T\u00e1vara L, Garci\u00e1-Guzm\u00e1n L et al (2018) Characterization of 3d printed long fibre reinforced composites. Compos Struct 185:537\u2013548. https:\/\/doi.org\/10.1016\/j.compstruct.2017.11.052","journal-title":"Compos Struct"},{"key":"17263_CR53","unstructured":"DIN EN ISO 527-5 (2022) Plastics - determination of tensile properties - Part 5: test conditions for unidirectional fibre-reinforced plastic composites (ISO 527-5:2021). German standard, Beuth Verlag GmbH, Berlin. https:\/\/www.beuth.de\/de\/norm\/din-en-iso-527-5\/349263704"}],"container-title":["The International Journal of Advanced Manufacturing Technology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s00170-025-17263-3.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/article\/10.1007\/s00170-025-17263-3","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s00170-025-17263-3.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,1,4]],"date-time":"2026-01-04T02:56:54Z","timestamp":1767495414000},"score":1,"resource":{"primary":{"URL":"https:\/\/link.springer.com\/10.1007\/s00170-025-17263-3"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,1,4]]},"references-count":53,"alternative-id":["17263"],"URL":"https:\/\/doi.org\/10.1007\/s00170-025-17263-3","relation":{},"ISSN":["0268-3768","1433-3015"],"issn-type":[{"value":"0268-3768","type":"print"},{"value":"1433-3015","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,1,4]]},"assertion":[{"value":"25 June 2025","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"12 December 2025","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"4 January 2026","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"The authors have no competing interests to declare that are relevant to the content of this article.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing Interests"}}]}}</enrichment>
    <enrichment key="local_crossrefDocumentType">journal-article</enrichment>
    <enrichment key="local_crossrefLicence">https://creativecommons.org/licenses/by/4.0</enrichment>
    <enrichment key="local_import_origin">crossref</enrichment>
    <enrichment key="local_doiImportPopulated">PersonAuthorFirstName_1,PersonAuthorLastName_1,PersonAuthorIdentifierOrcid_1,PersonAuthorFirstName_2,PersonAuthorLastName_2,PersonAuthorFirstName_3,PersonAuthorLastName_3,PersonAuthorFirstName_4,PersonAuthorLastName_4,PersonAuthorFirstName_5,PersonAuthorLastName_5,PublisherName,TitleMain_1,Language,TitleParent_1,CompletedYear,IdentifierIssn,Enrichmentlocal_crossrefLicence</enrichment>
    <enrichment key="BegutachtungStatus">peer-reviewed</enrichment>
    <enrichment key="opus.source">doi-import</enrichment>
    <enrichment key="CorrespondingAuthor">Anna Afanasev</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <licence>Creative Commons - CC BY - Namensnennung 4.0 International</licence>
    <author>Anna Afanasev</author>
    <author>Philipp Höfer</author>
    <author>Jens Holtmannspötter</author>
    <author>Felix Zimmer</author>
    <author>Ingo Ehrlich</author>
    <collection role="institutes" number="FAKMB">Fakultät Maschinenbau</collection>
    <collection role="institutes" number="TCNeustadt">Technologie-Campus Neustadt an der Donau</collection>
    <collection role="persons" number="ehrlichlft">Ehrlich, Ingo (Prof. Dr.) - Labor Faserverbundtechnik</collection>
    <collection role="persons" number="tcnehno">Technologie-Campus Neustadt a. d. Donau (Prof. Ehrlich+ Prof. Nonn)</collection>
    <collection role="oaweg" number="">Corresponding author der OTH Regensburg</collection>
    <collection role="DFGFachsystematik" number="1">Ingenieurwissenschaften</collection>
    <collection role="othforschungsschwerpunkt" number="">Materialien und Produktion</collection>
  </doc>
  <doc>
    <id>8745</id>
    <completedYear/>
    <publishedYear>2026</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>36</pageNumber>
    <edition/>
    <issue/>
    <volume>450</volume>
    <type>article</type>
    <publisherName>Elsevier</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">An analysis of the critical time step size for explicit dynamics using trimmed B-splines, LR-splines, and THB-splines</title>
    <abstract language="eng">Isogeometric analysis (IGA) combined with explicit dynamics is increasingly used in academia and has already been successfully applied in industrial simulations, including crash and sheet-metal forming. Since explicit schemes are only conditionally stable, accurate estimation of the critical time step is essential for both stability and efficiency. Adaptive mesh refinement is widely used to balance accuracy and computational cost. In IGA, THB- and LR-splines break the tensor-product structure of standard B-splines and enable local refinement, but their effect on the critical time step under trimming has not been systematically studied - a key requirement for reliable time step estimation.&#13;
We investigate the critical time step in explicit dynamic simulations using trimmed B-splines, LR-splines, and THB-splines, based on a lumped mass matrix obtained by simple row summation. One-dimensional bar, two-dimensional membrane, and trimmed shell models are analyzed to determine how trimming and local refinement influence element and system eigenfrequencies, which directly control the stable time step. Refined boundary elements in open knot vectors are identified as the main bottleneck. Trimming these elements can increase the stable time step, though certain trimming configurations introduce new restrictions.&#13;
Results show that LR- and THB-splines impose time step constraints similar to B-splines, making them equally suitable for explicit simulations. We also present a general method for computing element-wise Bézier extraction operators for LR- and THB-splines, enabling straightforward integration into standard finite element solvers. The findings are validated through nonlinear sheet-metal forming simulations in LS-DYNA using shells discretized with trimmed B-, LR-, and THB-splines. This represents the first such application and demonstrates their practical feasibility for industrial use.</abstract>
    <parentTitle language="eng">Computer Methods in Applied Mechanics and Engineering</parentTitle>
    <identifier type="issn">0045-7825</identifier>
    <identifier type="doi">10.1016/j.cma.2025.118656</identifier>
    <note>Corresponding author der OTH Regensburg: Christoph Hollweck</note>
    <enrichment key="opus_doi_flag">true</enrichment>
    <enrichment key="opus_import_data">{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,18]],"date-time":"2025-12-18T17:30:25Z","timestamp":1766079025104,"version":"3.48.0"},"reference-count":80,"publisher":"Elsevier BV","license":[{"start":{"date-parts":[[2026,3,1]],"date-time":"2026-03-01T00:00:00Z","timestamp":1772323200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2026,3,1]],"date-time":"2026-03-01T00:00:00Z","timestamp":1772323200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/legal\/tdmrep-license"},{"start":{"date-parts":[[2025,12,11]],"date-time":"2025-12-11T00:00:00Z","timestamp":1765411200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004350","name":"German National Merit Foundation","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100004350","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["elsevier.com","sciencedirect.com"],"crossmark-restriction":true},"short-container-title":["Computer Methods in Applied Mechanics and Engineering"],"published-print":{"date-parts":[[2026,3]]},"DOI":"10.1016\/j.cma.2025.118656","type":"journal-article","created":{"date-parts":[[2025,12,18]],"date-time":"2025-12-18T14:06:38Z","timestamp":1766066798000},"page":"118656","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":0,"special_numbering":"C","title":["An analysis of the critical time step size for explicit dynamics using trimmed B-splines, LR-splines, and THB-splines"],"prefix":"10.1016","volume":"450","author":[{"ORCID":"https:\/\/orcid.org\/0009-0000-6374-0071","authenticated-orcid":false,"given":"Christoph","family":"Hollweck","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4357-3848","authenticated-orcid":false,"given":"Lukas","family":"Leidinger","sequence":"additional","affiliation":[]},{"given":"Stefan","family":"Hartmann","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7740-1967","authenticated-orcid":false,"given":"Marcus","family":"Wagner","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5411-9715","authenticated-orcid":false,"given":"Roland","family":"W\u00fcchner","sequence":"additional","affiliation":[]}],"member":"78","reference":[{"key":"10.1016\/j.cma.2025.118656_bib0001","doi-asserted-by":"crossref","DOI":"10.1007\/978-3-642-59223-2","article-title":"The NURBS Book","author":"Piegl","year":"1997"},{"issue":"39","key":"10.1016\/j.cma.2025.118656_bib0002","doi-asserted-by":"crossref","first-page":"4135","DOI":"10.1016\/j.cma.2004.10.008","article-title":"Isogeometric analysis: CAD, finite elements, NURBS, exact geometry and mesh refinement","volume":"194","author":"Hughes","year":"2005","journal-title":"Comput. Methods Appl. Mech. Eng."},{"key":"10.1016\/j.cma.2025.118656_bib0003","doi-asserted-by":"crossref","first-page":"101","DOI":"10.1016\/j.cma.2015.12.027","article-title":"Nonlinear isogeometric spatial bernoulli beam","volume":"303","author":"Bauer","year":"2016","journal-title":"Comput. Methods Appl. Mech. Eng."},{"issue":"4","key":"10.1016\/j.cma.2025.118656_bib0004","first-page":"251","article-title":"Innovative CAD-integrated isogeometric simulation of sliding edge cables in lightweight structures","volume":"59","author":"Bauer","year":"2018","journal-title":"J. Int. Assoc. Shell Spat. Struct."},{"key":"10.1016\/j.cma.2025.118656_bib0005","doi-asserted-by":"crossref","DOI":"10.1016\/j.cma.2019.112747","article-title":"Weak coupling of nonlinear isogeometric spatial bernoulli beams","volume":"361","author":"Bauer","year":"2020","journal-title":"Comput. Methods Appl. Mech. Eng."},{"issue":"1","key":"10.1016\/j.cma.2025.118656_bib0006","doi-asserted-by":"crossref","first-page":"19","DOI":"10.1186\/s40323-018-0109-4","article-title":"Realization of CAD-integrated shell simulation based on isogeometric B-Rep analysis","volume":"5","author":"Teschemacher","year":"2018","journal-title":"Adv. Model. Simul. Eng. Sci."},{"key":"10.1016\/j.cma.2025.118656_bib0007","doi-asserted-by":"crossref","DOI":"10.1016\/j.cma.2022.115584","article-title":"Efficient CAD-integrated isogeometric analysis of trimmed solids","volume":"400","author":"Me\u00dfmer","year":"2022","journal-title":"Comput. Methods Appl. Mech. Eng."},{"key":"10.1016\/j.cma.2025.118656_bib0008","doi-asserted-by":"crossref","first-page":"891","DOI":"10.1016\/j.cma.2019.04.016","article-title":"Explicit dynamic isogeometric B-Rep analysis of penalty-coupled trimmed NURBS shells","volume":"351","author":"Leidinger","year":"2019","journal-title":"Comput. Methods Appl. Mech. Eng."},{"issue":"49","key":"10.1016\/j.cma.2025.118656_bib0009","doi-asserted-by":"crossref","first-page":"3902","DOI":"10.1016\/j.cma.2009.08.013","article-title":"Isogeometric shell analysis with Kirchhoff-Love elements","volume":"198","author":"Kiendl","year":"2009","journal-title":"Comput. Methods Appl. Mech. Eng."},{"issue":"37","key":"10.1016\/j.cma.2025.118656_bib0010","doi-asserted-by":"crossref","first-page":"2403","DOI":"10.1016\/j.cma.2010.03.029","article-title":"The bending strip method for isogeometric analysis of Kirchhoff-Love shell structures comprised of multiple patches","volume":"199","author":"Kiendl","year":"2010","journal-title":"Comput. Methods Appl. Mech. Eng."},{"year":"2011","series-title":"Isogeometric Analysis and Shape Optimal Design of Shell Structures","author":"Kiendl","key":"10.1016\/j.cma.2025.118656_bib0011"},{"issue":"7","key":"10.1016\/j.cma.2025.118656_bib0012","doi-asserted-by":"crossref","first-page":"473","DOI":"10.1002\/nme.4568","article-title":"A Nitsche-type formulation and comparison of the most common domain decomposition methods in isogeometric analysis","volume":"97","author":"Apostolatos","year":"2014","journal-title":"Int. J. Numer. Methods Eng."},{"key":"10.1016\/j.cma.2025.118656_bib0013","doi-asserted-by":"crossref","first-page":"401","DOI":"10.1016\/j.cma.2014.09.033","article-title":"Analysis in computer aided design: nonlinear isogeometric B-Rep analysis of shell structures","volume":"284","author":"Breitenberger","year":"2015","journal-title":"Comput Methods Appl Mech Eng"},{"issue":"3","key":"10.1016\/j.cma.2025.118656_bib0014","doi-asserted-by":"crossref","first-page":"475","DOI":"10.24425\/aoa.2019.129263","article-title":"Isogeometric fast multipole boundary element method based on Burton-Miller formulation for 3D acoustic problems","volume":"44","author":"Chen","year":"2019","journal-title":"Arch. Acoust."},{"key":"10.1016\/j.cma.2025.118656_bib0015","article-title":"Implementation of isogeometric fast multipole boundary element methods for 2D half-Space acoustic scattering problems with absorbing boundary condition","volume":"27","author":"Chen","year":"2018","journal-title":"J. Theor. Comput. Acoust."},{"year":"2015","series-title":"Isogeometrische Modellierung und Diskretisierung von Kontaktproblemen","author":"Matzen","key":"10.1016\/j.cma.2025.118656_bib0016"},{"issue":"1","key":"10.1016\/j.cma.2025.118656_bib0017","doi-asserted-by":"crossref","first-page":"85","DOI":"10.1002\/gamm.201410005","article-title":"Isogeometric contact: a review","volume":"37","author":"De Lorenzis","year":"2014","journal-title":"GAMM-Mitteilungen"},{"key":"10.1016\/j.cma.2025.118656_bib0018","doi-asserted-by":"crossref","first-page":"28","DOI":"10.1016\/j.cma.2012.03.028","article-title":"Isogeometric fluid-structure interaction analysis with emphasis on non-matching discretizations, and with application to wind turbines","volume":"249\u2013252","author":"Bazilevs","year":"2012","journal-title":"Comput. Methods Appl. Mech. Eng."},{"key":"10.1016\/j.cma.2025.118656_bib0019","doi-asserted-by":"crossref","DOI":"10.1007\/s00466-006-0084-3","article-title":"Isogeometric fluid-structure interaction analysis with applications to arterial","author":"Bazilevs","year":"2006","journal-title":"Comput. Mech."},{"issue":"1","key":"10.1016\/j.cma.2025.118656_bib0020","doi-asserted-by":"crossref","first-page":"93","DOI":"10.1016\/j.compfluid.2011.05.002","article-title":"High-performance computing of wind turbine aerodynamics using isogeometric analysis","volume":"49","author":"Hsu","year":"2011","journal-title":"Comput. Fluids"},{"issue":"1","key":"10.1016\/j.cma.2025.118656_bib0021","doi-asserted-by":"crossref","first-page":"173","DOI":"10.1016\/j.cma.2007.07.016","article-title":"Variational multiscale residual-based turbulence modeling for large eddy simulation of incompressible flows","volume":"197","author":"Bazilevs","year":"2007","journal-title":"Comput. Methods Appl. Mech. Eng."},{"issue":"25","key":"10.1016\/j.cma.2025.118656_bib0022","doi-asserted-by":"crossref","first-page":"2237","DOI":"10.1016\/j.cma.2011.03.007","article-title":"Isogeometric shape optimization of photonic crystals via coons patches","volume":"200","author":"Qian","year":"2011","journal-title":"Comput. Methods Appl. Mech. Eng."},{"key":"10.1016\/j.cma.2025.118656_bib0023","doi-asserted-by":"crossref","DOI":"10.1007\/s00158-015-1361-6","article-title":"Isogeometric shape optimization of trimmed shell structures","author":"Kang","year":"2016","journal-title":"Struct. Multidiscip. Optim."},{"key":"10.1016\/j.cma.2025.118656_bib0024","doi-asserted-by":"crossref","first-page":"148","DOI":"10.1016\/j.cma.2014.02.001","article-title":"Isogeometric shape optimization of shells using semi-analytical sensitivity analysis and sensitivity weighting","volume":"274","author":"Kiendl","year":"2014","journal-title":"Comput. Methods Appl. Mech. Eng."},{"issue":"41\u201343","key":"10.1016\/j.cma.2025.118656_bib0025","doi-asserted-by":"crossref","first-page":"5257","DOI":"10.1016\/j.cma.2005.09.027","article-title":"Isogeometric analysis of structural vibrations","volume":"195","author":"Cottrell","year":"2006","journal-title":"Comput. Methods Appl. Mech. Eng."},{"key":"10.1016\/j.cma.2025.118656_bib0026","doi-asserted-by":"crossref","DOI":"10.1016\/j.cma.2019.112808","article-title":"Adaptive fourth-order phase field analysis for brittle fracture","volume":"361","author":"Goswami","year":"2020","journal-title":"Comput. Methods Appl. Mech. Eng."},{"key":"10.1016\/j.cma.2025.118656_bib0027","series-title":"16th International LS-DYNA\u00ae Users Conference Isogeometric Analysis","article-title":"The latest developments of the ANSA preprocessor for IGA applications of LS-DYNA","author":"Rorris","year":"2020"},{"key":"10.1016\/j.cma.2025.118656_bib0028","series-title":"12th European LS-DYNA Conference","article-title":"The ANSA \/ LS-DYNA approach for IGA simulations","author":"Rorris","year":"2019"},{"year":"2023","series-title":"The Application of an IGA Body-In-White in a Hybrid Full Car Simulation","author":"Bauer","key":"10.1016\/j.cma.2025.118656_bib0029"},{"year":"2022","series-title":"Isogeometric Reconstruction and crash Analysis of a 1996 Body-in-White Dodge Neon","author":"Shepherd","key":"10.1016\/j.cma.2025.118656_bib0030"},{"year":"2020","series-title":"Explicit Isogeometric B-Rep Analysis for Nonlinear Dynamic Crash Simulations","author":"Leidinger","key":"10.1016\/j.cma.2025.118656_bib0031"},{"key":"10.1016\/j.cma.2025.118656_bib0032","doi-asserted-by":"crossref","DOI":"10.1002\/nme.7499","article-title":"An analysis of high order FEM and IGA for explicit dynamics: mass lumping and immersed boundaries","volume":"125","author":"Radtke","year":"2024","journal-title":"Int. J. Numer. Methods Eng."},{"key":"10.1016\/j.cma.2025.118656_bib0033","doi-asserted-by":"crossref","DOI":"10.1007\/s00466-025-02704-3","article-title":"A CFL condition for the finite cell method","author":"B\u00fcrchner","year":"2025","journal-title":"Comput. Mech."},{"year":"2009","series-title":"Isogeometric Analysis: Toward Integration of CAD and FEA","author":"Hughes","key":"10.1016\/j.cma.2025.118656_bib0034"},{"key":"10.1016\/j.cma.2025.118656_bib0035","doi-asserted-by":"crossref","DOI":"10.1016\/j.cma.2023.116233","article-title":"Towards higher-order accurate mass lumping in explicit isogeometric analysis for structural dynamics","volume":"417","author":"Nguyen","year":"2023","journal-title":"Comput. Methods Appl. Mech. Eng."},{"issue":"3","key":"10.1016\/j.cma.2025.118656_bib0036","doi-asserted-by":"crossref","first-page":"103","DOI":"10.1007\/s10915-025-02990-2","article-title":"A theoretical study on the effect of mass lumping on the discrete frequencies in immersogeometric analysis","volume":"104","author":"Bioli","year":"2025","journal-title":"J. Sci. Comput."},{"key":"10.1016\/j.cma.2025.118656_bib0037","doi-asserted-by":"crossref","unstructured":"Y. Voet, E. Sande, A. Buffa, Mass lumping and outlier removal strategies for complex geometries in isogeometric analysis (2024). Accepted manuscript. 10.48550\/arXiv.2402.14956.","DOI":"10.1090\/mcom\/4060"},{"key":"10.1016\/j.cma.2025.118656_bib0038","doi-asserted-by":"crossref","DOI":"10.1016\/j.cma.2023.116033","article-title":"A mathematical theory for mass lumping and its generalization with applications to isogeometric analysis","volume":"410","author":"Voet","year":"2023","journal-title":"Comput. Methods Appl. Mech. Eng."},{"key":"10.1016\/j.cma.2025.118656_bib0039","unstructured":"Y. Voet, E. Sande, A. Buffa, Mass lumping and stabilization for immersogeometric Analysis (2025a). Submitted manuscript. 10.48550\/arXiv.2502.00452."},{"issue":"2","key":"10.1016\/j.cma.2025.118656_bib0040","doi-asserted-by":"crossref","first-page":"469","DOI":"10.1007\/s00466-025-02611-7","article-title":"A theoretical analysis of mass scaling techniques","volume":"76","author":"Voet","year":"2025","journal-title":"Comput. Mech."},{"key":"10.1016\/j.cma.2025.118656_bib0041","series-title":"AIP Conference Proceedings: Materials Processing and Design; Modeling, Simulation and Applications; NUMIFORM \u201907; 9th International Conference on Numerical Methods in Industrial Forming Processes","first-page":"937","article-title":"Adaptive refinement procedure for sheet metal forming","author":"Cherouat","year":"2007"},{"year":"2006","series-title":"LS-DYNA Theory Manual","author":"Hallquist","key":"10.1016\/j.cma.2025.118656_bib0042"},{"issue":"5","key":"10.1016\/j.cma.2025.118656_bib0043","doi-asserted-by":"crossref","first-page":"264","DOI":"10.1016\/j.cma.2008.07.012","article-title":"Adaptive isogeometric analysis by local h-refinement with T-splines","volume":"199","author":"D\u00f6rfel","year":"2010","journal-title":"Comput. Methods Appl. Mech. Eng."},{"issue":"11","key":"10.1016\/j.cma.2025.118656_bib0044","doi-asserted-by":"crossref","first-page":"1438","DOI":"10.1016\/j.cad.2011.08.026","article-title":"Adaptive isogeometric analysis using rational PHT-splines","volume":"43","author":"Wang","year":"2011","journal-title":"Comput. Aided Des."},{"issue":"3","key":"10.1016\/j.cma.2025.118656_bib0045","doi-asserted-by":"crossref","first-page":"331","DOI":"10.1016\/j.cagd.2012.12.005","article-title":"Polynomial splines over locally refined box-partitions","volume":"30","author":"Dokken","year":"2013","journal-title":"Comput. Aided Geom. Des."},{"year":"2012","series-title":"Adaptive Hierarchical Isogeometric Finite Element Methods","author":"Vuong","key":"10.1016\/j.cma.2025.118656_bib0046"},{"issue":"7","key":"10.1016\/j.cma.2025.118656_bib0047","doi-asserted-by":"crossref","first-page":"485","DOI":"10.1016\/j.cagd.2012.03.025","article-title":"THB-splines: the truncated basis for hierarchical splines","volume":"29","author":"Giannelli","year":"2012","journal-title":"Comput. Aided Geom. Des."},{"issue":"2","key":"10.1016\/j.cma.2025.118656_bib0048","doi-asserted-by":"crossref","first-page":"459","DOI":"10.1007\/s10444-013-9315-2","article-title":"Strongly stable bases for adaptively refined multilevel spline spaces","volume":"40","author":"Giannelli","year":"2014","journal-title":"Adv. Comput. Math."},{"key":"10.1016\/j.cma.2025.118656_bib0049","doi-asserted-by":"crossref","first-page":"64","DOI":"10.1016\/j.cma.2015.02.031","article-title":"On the similarities and differences between classical hierarchical, truncated hierarchical and LR B-splines","volume":"291","author":"Johannessen","year":"2015","journal-title":"Comput. Methods Appl. Mech. Eng."},{"year":"2013","series-title":"Nonlinear Finite Elements for Continua and Structures","author":"Belytschko","key":"10.1016\/j.cma.2025.118656_bib0050"},{"issue":"4","key":"10.1016\/j.cma.2025.118656_bib0051","article-title":"An adaptive space-time phase field formulation for dynamic fracture of brittle shells based on LR NURBS","volume":"23","author":"Paul","year":"2019","journal-title":"PAMM"},{"issue":"4","key":"10.1016\/j.cma.2025.118656_bib0052","doi-asserted-by":"crossref","DOI":"10.1002\/pamm.202300092","article-title":"Multi-level B\u00e9zier extraction of truncated hierarchical b-splines for isogeometric analysis","volume":"23","author":"Grendas","year":"2023","journal-title":"PAMM"},{"key":"10.1016\/j.cma.2025.118656_bib0053","doi-asserted-by":"crossref","first-page":"147","DOI":"10.1016\/j.cma.2017.08.017","article-title":"Multi-level B\u00e9zier extraction for hierarchical local refinement of isogeometric analysis","volume":"328","author":"D\u2019Angella","year":"2018","journal-title":"Comput. Methods Appl. Mech. Eng."},{"issue":"1","key":"10.1016\/j.cma.2025.118656_bib0054","doi-asserted-by":"crossref","first-page":"50","DOI":"10.1016\/0021-9045(72)90080-9","article-title":"On calculating with B-splines","volume":"6","author":"de Boor","year":"1972","journal-title":"J. Approx. Theory"},{"key":"10.1016\/j.cma.2025.118656_bib0055","doi-asserted-by":"crossref","first-page":"471","DOI":"10.1016\/j.cma.2013.09.014","article-title":"Isogeometric analysis using LR B-splines","volume":"269","author":"Johannessen","year":"2014","journal-title":"Comput. Methods Appl. Mech. Eng."},{"key":"10.1016\/j.cma.2025.118656_bib0056","doi-asserted-by":"crossref","DOI":"10.1007\/s11831-022-09752-5","article-title":"Mathematical foundations of adaptive isogeometric analysis","author":"Buffa","year":"2022","journal-title":"Arch. Comput. Methods Eng."},{"key":"10.1016\/j.cma.2025.118656_bib0057","doi-asserted-by":"crossref","first-page":"58","DOI":"10.1016\/j.apnum.2017.08.006","article-title":"Algorithms for the implementation of adaptive isogeometric methods using hierarchical B-splines","volume":"123","author":"Garau","year":"2018","journal-title":"Appl. Numer. Math."},{"key":"10.1016\/j.cma.2025.118656_bib0058","doi-asserted-by":"crossref","first-page":"337","DOI":"10.1016\/j.cma.2015.11.002","article-title":"THB-splines: an effective mathematical technology for adaptive refinement in geometric design and isogeometric analysis","volume":"299","author":"Giannelli","year":"2016","journal-title":"Comput. Methods Appl. Mech. Eng."},{"issue":"1","key":"10.1016\/j.cma.2025.118656_bib0059","doi-asserted-by":"crossref","first-page":"15","DOI":"10.1002\/nme.2968","article-title":"Isogeometric finite element data structures based on B\u00e9zier extraction of NURBS","volume":"87","author":"Borden","year":"2011","journal-title":"Int. J. Numer. Methods Eng."},{"year":"2022","series-title":"The Multi-Level B\u00e9zier Extraction for Hierarchical Local Refinement of Trimmed Isogeometric Finite Cell Analyses","author":"D\u2019Angella","key":"10.1016\/j.cma.2025.118656_bib0060"},{"key":"10.1016\/j.cma.2025.118656_bib0061","doi-asserted-by":"crossref","DOI":"10.1016\/j.cma.2020.113131","article-title":"Efficient extraction of hierarchical B-splines for local refinement and coarsening of isogeometric analysis","volume":"367","author":"D\u2019Angella","year":"2020","journal-title":"Comput. Methods Appl. Mech. Eng."},{"issue":"1","key":"10.1016\/j.cma.2025.118656_bib0062","doi-asserted-by":"crossref","first-page":"97","DOI":"10.1007\/BF01553881","article-title":"Constrained delaunay triangulations","volume":"4","author":"Chew","year":"1989","journal-title":"Algorithmica"},{"issue":"37","key":"10.1016\/j.cma.2025.118656_bib0063","doi-asserted-by":"crossref","first-page":"2982","DOI":"10.1016\/j.cma.2009.05.004","article-title":"Isogeometric analysis for trimmed CAD surfaces","volume":"198","author":"Kim","year":"2009","journal-title":"Comput. Methods Appl. Mech. Eng."},{"year":"2016","series-title":"CAD-integrated design and analysis of shell structures","author":"Breitenberger","key":"10.1016\/j.cma.2025.118656_bib0064"},{"key":"10.1016\/j.cma.2025.118656_bib0065","doi-asserted-by":"crossref","first-page":"297","DOI":"10.1016\/j.cma.2016.07.006","article-title":"Condition number analysis and preconditioning of the finite cell method","volume":"316","author":"de Prenter","year":"2017","journal-title":"Comput. Methods Appl. Mech. Eng."},{"year":"2022","series-title":"Stability and Conditioning of Immersed Finite Element Methods: Analysis and Remedies","author":"de Prenter","key":"10.1016\/j.cma.2025.118656_bib0066"},{"key":"10.1016\/j.cma.2025.118656_bib0067","doi-asserted-by":"crossref","DOI":"10.1016\/j.cma.2024.117407","article-title":"The immersed boundary conformal method for Kirchhoff-love and Reissner-mindlin shells","volume":"432","author":"Guarino","year":"2024","journal-title":"Comput. Methods Appl. Mech. Eng."},{"issue":"13","key":"10.1016\/j.cma.2025.118656_bib0068","doi-asserted-by":"crossref","first-page":"1367","DOI":"10.1016\/j.cma.2010.12.003","article-title":"A large deformation, rotation-free, isogeometric shell","volume":"200","author":"Benson","year":"2011","journal-title":"Comput. Methods Appl. Mech. Eng."},{"key":"10.1016\/j.cma.2025.118656_bib0069","series-title":"Numerical Linear Algebra with Applications","first-page":"533","article-title":"Chapter 22 - large sparse eigenvalue problems","author":"Ford","year":"2015"},{"key":"10.1016\/j.cma.2025.118656_bib0070","doi-asserted-by":"crossref","first-page":"159","DOI":"10.1016\/0045-7825(79)90086-0","article-title":"Implicit-explicit finite elements in nonlinear transient analysis","volume":"17\u201318","author":"Hughes","year":"1979","journal-title":"Comput. Methods Appl. Mech. Eng."},{"issue":"3","key":"10.1016\/j.cma.2025.118656_bib0071","doi-asserted-by":"crossref","first-page":"281","DOI":"10.1016\/0045-7825(85)90126-4","article-title":"Stability of multi-time step partitioned integrators for first-order finite element systems","volume":"49","author":"Belytschko","year":"1985","journal-title":"Comput. Methods Appl. Mech. Eng."},{"issue":"4","key":"10.1016\/j.cma.2025.118656_bib0072","doi-asserted-by":"crossref","first-page":"407","DOI":"10.1016\/0022-460X(72)90452-X","article-title":"Bounds on the extremal eigenvalues of the finite element stiffness and mass matrices and their spectral condition number","volume":"22","author":"Fried","year":"1972","journal-title":"J. Sound Vib."},{"key":"10.1016\/j.cma.2025.118656_bib0073","series-title":"Proceedings of the Third Conference on Matrix Methods in Structural Mechanics","first-page":"245","article-title":"A bound theorem in eigenvalues and its practical applications","author":"Irons","year":"1973"},{"key":"10.1016\/j.cma.2025.118656_bib0074","doi-asserted-by":"crossref","first-page":"581","DOI":"10.1016\/j.cma.2015.03.017","article-title":"Stable time step estimates for NURBS-based explicit dynamics","volume":"295","author":"Adam","year":"2015","journal-title":"Comput. Methods Appl. Mech. Eng."},{"issue":"5","key":"10.1016\/j.cma.2025.118656_bib0075","doi-asserted-by":"crossref","first-page":"276","DOI":"10.1016\/j.cma.2009.05.011","article-title":"Isogeometric shell analysis: the reissner-mindlin shell","volume":"199","author":"Benson","year":"2010","journal-title":"Comput. Methods Appl. Mech. Eng."},{"key":"10.1016\/j.cma.2025.118656_bib0076","doi-asserted-by":"crossref","DOI":"10.1016\/j.tws.2022.109844","article-title":"Numerical implementation for isogeometric analysis of thin-walled structures based on a B\u00e9zier extraction framework: nligastruct","volume":"180","author":"Du","year":"2022","journal-title":"Thin-Walled Struct."},{"key":"10.1016\/j.cma.2025.118656_bib0077","doi-asserted-by":"crossref","DOI":"10.1016\/j.cad.2024.103728","article-title":"Isogeometric shape optimization of reissner-mindlin shell with analytical sensitivity and application to cellular sandwich structures","volume":"173","author":"Du","year":"2024","journal-title":"Comput.-Aided Des."},{"key":"10.1016\/j.cma.2025.118656_bib0078","unstructured":"J.K. Lee, et al. (Eds.), Proceedings of the 3rd International Conference on Numerical Simulations of 3-D Sheet Metal Forming Processes, 1996."},{"key":"10.1016\/j.cma.2025.118656_bib0079","series-title":"14th European LS-DYNA Conference, Baden-Baden, Germany","article-title":"Systematic assessment of isogeometric sheet metal forming simulations based on trimmed, multi-patch NURBS models in LS-DYNA","author":"Hollweck","year":"2023"},{"year":"2014","series-title":"Finite Element Procedures","author":"Bathe","key":"10.1016\/j.cma.2025.118656_bib0080"}],"container-title":["Computer Methods in Applied Mechanics and Engineering"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0045782525009284?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0045782525009284?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2025,12,18]],"date-time":"2025-12-18T17:28:04Z","timestamp":1766078884000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S0045782525009284"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,3]]},"references-count":80,"alternative-id":["S0045782525009284"],"URL":"https:\/\/doi.org\/10.1016\/j.cma.2025.118656","relation":{},"ISSN":["0045-7825"],"issn-type":[{"type":"print","value":"0045-7825"}],"subject":[],"published":{"date-parts":[[2026,3]]},"assertion":[{"value":"Elsevier","name":"publisher","label":"This article is maintained by"},{"value":"An analysis of the critical time step size for explicit dynamics using trimmed B-splines, LR-splines, and THB-splines","name":"articletitle","label":"Article Title"},{"value":"Computer Methods in Applied Mechanics and Engineering","name":"journaltitle","label":"Journal Title"},{"value":"https:\/\/doi.org\/10.1016\/j.cma.2025.118656","name":"articlelink","label":"CrossRef DOI link to publisher maintained version"},{"value":"article","name":"content_type","label":"Content Type"},{"value":"\u00a9 2025 The Author(s). Published by Elsevier B.V.","name":"copyright","label":"Copyright"}],"article-number":"118656"}}</enrichment>
    <enrichment key="local_crossrefDocumentType">journal-article</enrichment>
    <enrichment key="local_crossrefLicence">https://www.elsevier.com/tdm/userlicense/1.0/</enrichment>
    <enrichment key="local_import_origin">crossref</enrichment>
    <enrichment key="local_doiImportPopulated">PersonAuthorFirstName_1,PersonAuthorLastName_1,PersonAuthorIdentifierOrcid_1,PersonAuthorFirstName_2,PersonAuthorLastName_2,PersonAuthorIdentifierOrcid_2,PersonAuthorFirstName_3,PersonAuthorLastName_3,PersonAuthorFirstName_4,PersonAuthorLastName_4,PersonAuthorIdentifierOrcid_4,PersonAuthorFirstName_5,PersonAuthorLastName_5,PersonAuthorIdentifierOrcid_5,PublisherName,TitleMain_1,Language,TitleParent_1,ArticleNumber,Volume,CompletedYear,IdentifierIssn,Enrichmentlocal_crossrefLicence</enrichment>
    <enrichment key="opus.source">doi-import</enrichment>
    <enrichment key="CorrespondingAuthor">Christoph Hollweck</enrichment>
    <enrichment key="BegutachtungStatus">peer-reviewed</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <licence>Creative Commons - CC BY - Namensnennung 4.0 International</licence>
    <author>Christoph Hollweck</author>
    <author>Lukas Leidinger</author>
    <author>Stefan Hartmann</author>
    <author>Marcus Wagner</author>
    <author>Roland Wüchner</author>
    <collection role="institutes" number="FAKMB">Fakultät Maschinenbau</collection>
    <collection role="oaweg" number="">Hybrid Open Access - OA-Veröffentlichung in einer Subskriptionszeitschrift/-medium</collection>
    <collection role="oaweg" number="">Corresponding author der OTH Regensburg</collection>
    <collection role="funding" number="">DEAL Elsevier</collection>
    <collection role="DFGFachsystematik" number="1">Ingenieurwissenschaften</collection>
    <collection role="othforschungsschwerpunkt" number="">Digitale Transformation</collection>
  </doc>
  <doc>
    <id>8848</id>
    <completedYear/>
    <publishedYear>2025</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>22</pageNumber>
    <edition/>
    <issue>7</issue>
    <volume>15</volume>
    <type>article</type>
    <publisherName>MDPI</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Toward an Efficient and Robust Process–Structure Prediction Framework for Filigree L-PBF 316L Stainless Steel Structures</title>
    <abstract language="eng">Additive manufacturing (AM), particularly laser powder bed fusion (L-PBF), provides unmatched design flexibility for creating intricate steel structures with minimal post-processing. However, adopting L-PBF for high-performance applications is difficult due to the challenge of predicting microstructure evolution. This is because the process is sensitive to many parameters and has a complex thermal history. Thin-walled geometries present an added challenge because their dimensions often approach the scale of individual grains. Thus, microstructure becomes a critical factor in the overall integrity of the component. This study focuses on applying cellular automata (CA) modeling to establish robust and efficient process–structure relationships in L-PBF of 316L stainless steel. The CA framework simulates solidification-driven grain evolution and texture development across various processing conditions. Model predictions are evaluated against experimental electron backscatter diffraction (EBSD) data, with additional quantitative comparisons based on texture and morphology metrics. The results demonstrate that CA simulations calibrated with relevant process parameters can effectively reproduce key microstructural features, including grain size distributions, aspect ratios, and texture components, observed in thin-walled L-PBF structures. This work highlights the strengths and limitations of CA-based modeling and supports its role in reliably designing and optimizing complex L-PBF components.</abstract>
    <parentTitle language="eng">Metals</parentTitle>
    <identifier type="issn">2075-4701</identifier>
    <identifier type="doi">10.3390/met15070812</identifier>
    <enrichment key="opus_doi_flag">true</enrichment>
    <enrichment key="opus_import_data">{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,13]],"date-time":"2025-12-13T07:23:02Z","timestamp":1765610582144,"version":"build-2065373602"},"reference-count":46,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2025,7,20]],"date-time":"2025-07-20T00:00:00Z","timestamp":1752969600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Bavarian State Ministry of Science and the Arts"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Metals"],"abstract":"&lt;jats:p&gt;Additive manufacturing (AM), particularly laser powder bed fusion (L-PBF), provides unmatched design flexibility for creating intricate steel structures with minimal post-processing. However, adopting L-PBF for high-performance applications is difficult due to the challenge of predicting microstructure evolution. This is because the process is sensitive to many parameters and has a complex thermal history. Thin-walled geometries present an added challenge because their dimensions often approach the scale of individual grains. Thus, microstructure becomes a critical factor in the overall integrity of the component. This study focuses on applying cellular automata (CA) modeling to establish robust and efficient process\u2013structure relationships in L-PBF of 316L stainless steel. The CA framework simulates solidification-driven grain evolution and texture development across various processing conditions. Model predictions are evaluated against experimental electron backscatter diffraction (EBSD) data, with additional quantitative comparisons based on texture and morphology metrics. The results demonstrate that CA simulations calibrated with relevant process parameters can effectively reproduce key microstructural features, including grain size distributions, aspect ratios, and texture components, observed in thin-walled L-PBF structures. This work highlights the strengths and limitations of CA-based modeling and supports its role in reliably designing and optimizing complex L-PBF components.&lt;\/jats:p&gt;","DOI":"10.3390\/met15070812","type":"journal-article","created":{"date-parts":[[2025,7,21]],"date-time":"2025-07-21T10:35:31Z","timestamp":1753094131000},"page":"812","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Toward an Efficient and Robust Process\u2013Structure Prediction Framework for Filigree L-PBF 316L Stainless Steel Structures"],"prefix":"10.3390","volume":"15","author":[{"given":"Yu","family":"Qiao","sequence":"first","affiliation":[{"name":"Computational Mechanics and Materials Lab, Faculty of Mechanical Engineering, OTH Regensburg, Galgenbergstra\u00dfe 30, 93053 Regensburg, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5671-2897","authenticated-orcid":false,"given":"Marius","family":"Grad","sequence":"additional","affiliation":[{"name":"Computational Mechanics and Materials Lab, Faculty of Mechanical Engineering, OTH Regensburg, Galgenbergstra\u00dfe 30, 93053 Regensburg, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1522-224X","authenticated-orcid":false,"given":"Aida","family":"Nonn","sequence":"additional","affiliation":[{"name":"Computational Mechanics and Materials Lab, Faculty of Mechanical Engineering, OTH Regensburg, Galgenbergstra\u00dfe 30, 93053 Regensburg, Germany"}]}],"member":"1968","published-online":{"date-parts":[[2025,7,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"415","DOI":"10.1016\/j.jmapro.2021.12.064","article-title":"Process parameter selection and optimization of laser powder bed fusion for 316L stainless steel: A review","volume":"75","author":"Ahmed","year":"2022","journal-title":"J. Manuf. Process."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"3153","DOI":"10.1007\/s11661-999-0226-2","article-title":"A three-dimensional cellular automaton-finite element model for the prediction of solidification grain structures","volume":"30","author":"Gandin","year":"1999","journal-title":"Metall. Mater. Trans. A Phys. Metall. Mater. Sci."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"345","DOI":"10.1016\/0956-7151(93)90065-Z","article-title":"Probabilistic modelling of microstructure formation in solidification processes","volume":"41","author":"Rappaz","year":"1993","journal-title":"Acta Metall. Mater."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"116930","DOI":"10.1016\/j.actamat.2021.116930","article-title":"Optimizing the cellular automata finite element model for additive manufacturing to simulate large microstructures","volume":"213","author":"Teferra","year":"2021","journal-title":"Acta Mater."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"109434","DOI":"10.1016\/j.matdes.2020.109434","article-title":"Numerical prediction of grain structure formation during laser powder bed fusion of 316 L stainless steel","volume":"199","author":"Baumard","year":"2021","journal-title":"Mater. Des."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"479","DOI":"10.1016\/j.commatsci.2016.10.011","article-title":"Mesoscale modelling of selective laser melting: Thermal fluid dynamics and microstructural evolution","volume":"126","author":"Panwisawas","year":"2017","journal-title":"Comput. Mater. Sci."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"101031","DOI":"10.1016\/j.mtcomm.2020.101031","article-title":"Microstructural modelling of above \u03b2-transus heat treatment of additively manufactured Ti-6Al-4V using cellular automata","volume":"24","author":"Baere","year":"2020","journal-title":"Mater. Today Commun."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"207","DOI":"10.1016\/j.commatsci.2017.09.018","article-title":"Three-dimensional modeling of the microstructure evolution during metal additive manufacturing","volume":"141","author":"Zinovieva","year":"2018","journal-title":"Comput. Mater. Sci."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"025009","DOI":"10.1088\/1361-651X\/aaf753","article-title":"A multi-scale, multi-physics modeling framework to predict spatial variation of properties in additive-manufactured metals","volume":"27","author":"Herriott","year":"2019","journal-title":"Model. Simul. Mater. Sci. Eng."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"543","DOI":"10.1007\/s00466-017-1535-8","article-title":"A parallelized three-dimensional cellular automaton model for grain growth during additive manufacturing","volume":"61","author":"Lian","year":"2018","journal-title":"Comput. Mech."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"107672","DOI":"10.1016\/j.matdes.2019.107672","article-title":"A cellular automaton finite volume method for microstructure evolution during additive manufacturing","volume":"169","author":"Lian","year":"2019","journal-title":"Mater. Des."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"159","DOI":"10.1016\/j.commatsci.2018.06.019","article-title":"Numerical investigation of effects of nucleation mechanisms on grain structure in metal additive manufacturing","volume":"153","author":"Li","year":"2018","journal-title":"Comput. Mater. Sci."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"37","DOI":"10.1016\/j.commatsci.2016.07.005","article-title":"A coupled Cellular Automaton\u2013Lattice Boltzmann model for grain structure simulation during additive manufacturing","volume":"124","author":"Rai","year":"2016","journal-title":"Comput. Mater. Sci."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"78","DOI":"10.1016\/j.commatsci.2017.03.053","article-title":"Simulation of metal additive manufacturing microstructures using kinetic Monte Carlo","volume":"135","author":"Rodgers","year":"2017","journal-title":"Comput. Mater. Sci."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"066122","DOI":"10.1103\/PhysRevE.73.066122","article-title":"Multiphase-field approach for multicomponent alloys with extrapolation scheme for numerical application","volume":"73","author":"Eiken","year":"2006","journal-title":"Phys. Rev. E Stat. Nonlinear Soft Matter Phys."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"801","DOI":"10.1016\/j.actamat.2017.11.033","article-title":"Phase field simulation of powder bed-based additive manufacturing","volume":"144","author":"Lu","year":"2018","journal-title":"Acta Mater."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"244","DOI":"10.1016\/j.actamat.2017.05.003","article-title":"Methods to Additive Manufacturing of Ni-based Superalloys","volume":"139","author":"Keller","year":"2017","journal-title":"Acta Mater."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"1176","DOI":"10.1007\/s11837-015-1352-5","article-title":"Phase-field modeling of microstructure evolution in electron beam additive manufacturing","volume":"67","author":"Gong","year":"2015","journal-title":"Jom"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"100810","DOI":"10.1016\/j.pmatsci.2021.100810","article-title":"Phase-field modeling of microstructure evolution: Recent applications, perspectives and challenges","volume":"123","author":"Tourret","year":"2022","journal-title":"Prog. Mater. Sci."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"5235","DOI":"10.1007\/s11665-021-05725-0","article-title":"A Novel Approach to Predict the Process-Induced Mechanical Behavior of Additively Manufactured Materials","volume":"30","author":"Koepf","year":"2021","journal-title":"J. Mater. Eng. Perform."},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"Xu, F., Xiong, F., Li, M.J., and Lian, Y. (2022). Three-Dimensional Numerical Simulation of Grain Growth during Selective Laser Melting of 316L Stainless Steel. Materials, 15.","DOI":"10.3390\/ma15196800"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.actamat.2019.10.044","article-title":"The significance of spatial length scales and solute segregation in strengthening rapid solidification microstructures of 316L stainless steel","volume":"184","author":"Pinomaa","year":"2020","journal-title":"Acta Mater."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"320","DOI":"10.1016\/j.actamat.2019.11.057","article-title":"Finite interface dissipation phase field modeling of Ni\u2013Nb under additive manufacturing conditions","volume":"185","author":"Karayagiz","year":"2020","journal-title":"Acta Mater."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"116862","DOI":"10.1016\/j.actamat.2021.116862","article-title":"The development of grain structure during additive manufacturing","volume":"211","author":"Chadwick","year":"2021","journal-title":"Acta Mater."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"56","DOI":"10.1038\/s41524-021-00524-6","article-title":"Phase-field modeling of grain evolutions in additive manufacturing from nucleation, growth, to coarsening","volume":"7","author":"Yang","year":"2021","journal-title":"npj Comput. Mater."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"201","DOI":"10.1038\/s41524-022-00890-9","article-title":"Physics-embedded graph network for accelerating phase-field simulation of microstructure evolution in additive manufacturing","volume":"8","author":"Xue","year":"2022","journal-title":"npj Comput. Mater."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"191","DOI":"10.1016\/j.jmatprotec.2018.02.042","article-title":"Investigation on evolution mechanisms of site-specific grain structures during metal additive manufacturing","volume":"257","author":"Liu","year":"2018","journal-title":"J. Mater. Process. Technol."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"118707","DOI":"10.1016\/j.jmatprotec.2024.118707","article-title":"An integrated simulation approach for directing the texture control of austenitic stainless steel through laser beam powder bed fusion","volume":"336","author":"Chen","year":"2025","journal-title":"J. Mater. Process. Technol."},{"key":"ref_29","first-page":"103676","article-title":"An extended version of cellular automata model for powder bed fusion to unravel the dependence of microstructure on printing areas for Inconel 625","volume":"73","author":"Xie","year":"2023","journal-title":"Addit. Manuf."},{"key":"ref_30","first-page":"104622","article-title":"A multi-level capture algorithm for accelerating cellular automata predictions of grain structure and texture in additive manufacturing","volume":"98","author":"Liang","year":"2025","journal-title":"Addit. Manuf."},{"key":"ref_31","first-page":"104024","article-title":"Grain structure and texture selection regimes in metal powder bed fusion","volume":"81","author":"Rolchigo","year":"2024","journal-title":"Addit. Manuf."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"111692","DOI":"10.1016\/j.commatsci.2022.111692","article-title":"ExaCA: A performance portable exascale cellular automata application for alloy solidification modeling","volume":"214","author":"Rolchigo","year":"2022","journal-title":"Comput. Mater. Sci."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"113734","DOI":"10.1016\/j.commatsci.2025.113734","article-title":"ExaCA v2.0: A versatile, scalable, and performance portable cellular automata application for additive manufacturing solidification","volume":"251","author":"Rolchigo","year":"2025","journal-title":"Comput. Mater. Sci."},{"key":"ref_34","unstructured":"Coleman, J., Kincaid, K., Knapp, G.L., Stump, B., and Plotkowski, A.J. (2023). ORNL\/AdditiveFOAM: Release 1.0. Zenodo."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"2187","DOI":"10.1016\/S1359-6454(96)00303-5","article-title":"A 3D Cellular Automaton algorithm for the prediction of dendritic grain growth","volume":"45","author":"Gandin","year":"1997","journal-title":"Acta Mater."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"823","DOI":"10.1016\/0001-6160(86)90056-8","article-title":"Theory of Microstructural Development during Rapid Solidification","volume":"34","author":"Trivedi","year":"1986","journal-title":"Acta Metall."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"299","DOI":"10.1007\/BF02667333","article-title":"A new finite element model for welding heat sources","volume":"15","author":"Goldak","year":"1984","journal-title":"Metall. Trans. B"},{"key":"ref_38","first-page":"102429","article-title":"Effects of melt convection on stray grain formation in single crystal superalloys during directed energy deposition","volume":"48","author":"Lu","year":"2021","journal-title":"Addit. Manuf."},{"key":"ref_39","doi-asserted-by":"crossref","unstructured":"Cao, L. (2019). Numerical simulation of the impact of laying powder on selective laser melting single-pass formation. Int. J. Heat Mass Transf.","DOI":"10.1016\/j.ijheatmasstransfer.2019.07.053"},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"122201","DOI":"10.1115\/1.4047916","article-title":"Sensitivity of Thermal Predictions to Uncertain Surface Tension Data in Laser Additive Manufacturing","volume":"142","author":"Coleman","year":"2020","journal-title":"J. Heat Transf.-Trans. Asme"},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"345","DOI":"10.1016\/j.jmapro.2014.04.001","article-title":"Numerical and experimental investigations on laser melting of stainless steel 316L metal powders","volume":"16","author":"Antony","year":"2014","journal-title":"J. Manuf. Process."},{"key":"ref_42","first-page":"750","article-title":"Modeling of solidification microstructure evolution in laser powder bed fusion fabricated 316L stainless steel using combined computational fluid dynamics and cellular automata","volume":"28","author":"Zhang","year":"2019","journal-title":"Addit. Manuf."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"5715","DOI":"10.1007\/s00170-021-08352-0","article-title":"Numerical model of heat transfer during laser powder bed fusion of 316L stainless steel","volume":"119","author":"Cox","year":"2022","journal-title":"Int. J. Adv. Manuf. Technol."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"1615","DOI":"10.1002\/mawe.202000038","article-title":"Mechanical properties of small structures built by selective laser melting 316 L stainless steel\u2013A phenomenological approach to improve component design","volume":"51","author":"Wiesent","year":"2020","journal-title":"Mater. Werkst."},{"key":"ref_45","unstructured":"Beausir, B., and Fundenberger, J.-J. (2025, May 30). Analysis Tools for Electron and X-Ray Diffraction, ATEX-Software, Available online: www.atex-software.eu."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"671","DOI":"10.1016\/j.matchar.2018.09.020","article-title":"Application of chord length distributions and principal component analysis for quantification and representation of diverse polycrystalline microstructures","volume":"145","author":"Latypov","year":"2018","journal-title":"Mater. Charact."}],"container-title":["Metals"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2075-4701\/15\/7\/812\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T18:12:58Z","timestamp":1760033578000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2075-4701\/15\/7\/812"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,7,20]]},"references-count":46,"journal-issue":{"issue":"7","published-online":{"date-parts":[[2025,7]]}},"alternative-id":["met15070812"],"URL":"https:\/\/doi.org\/10.3390\/met15070812","relation":{},"ISSN":["2075-4701"],"issn-type":[{"type":"electronic","value":"2075-4701"}],"subject":[],"published":{"date-parts":[[2025,7,20]]}}}</enrichment>
    <enrichment key="local_crossrefDocumentType">journal-article</enrichment>
    <enrichment key="local_crossrefLicence">https://creativecommons.org/licenses/by/4.0/</enrichment>
    <enrichment key="local_import_origin">crossref</enrichment>
    <enrichment key="local_doiImportPopulated">PersonAuthorFirstName_1,PersonAuthorLastName_1,PersonAuthorFirstName_2,PersonAuthorLastName_2,PersonAuthorIdentifierOrcid_2,PersonAuthorFirstName_3,PersonAuthorLastName_3,PersonAuthorIdentifierOrcid_3,PublisherName,TitleMain_1,Language,TitleAbstract_1,TitleParent_1,ArticleNumber,Issue,Volume,CompletedYear,IdentifierIssn,Enrichmentlocal_crossrefLicence</enrichment>
    <enrichment key="Kostentraeger">PRESTIGE</enrichment>
    <enrichment key="BegutachtungStatus">peer-reviewed</enrichment>
    <enrichment key="opus.source">doi-import</enrichment>
    <enrichment key="CorrespondingAuthor">Yu Qiao</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <licence>Creative Commons - CC BY - Namensnennung 4.0 International</licence>
    <author>Yu Qiao</author>
    <author>Marius Grad</author>
    <author>Aida Nonn</author>
    <collection role="institutes" number="FAKMB">Fakultät Maschinenbau</collection>
    <collection role="oaweg" number="">Gold Open Access- Erstveröffentlichung in einem/als Open-Access-Medium</collection>
    <collection role="institutes" number="TCNeustadt">Technologie-Campus Neustadt an der Donau</collection>
    <collection role="persons" number="nonncmm">Nonn, Aida (Prof. Dr.) - Computational Mechanics and Materials Lab</collection>
    <collection role="persons" number="tcnehno">Technologie-Campus Neustadt a. d. Donau (Prof. Ehrlich+ Prof. Nonn)</collection>
    <collection role="oaweg" number="">Corresponding author der OTH Regensburg</collection>
    <collection role="funding" number="">Publikationsfonds der OTH Regensburg</collection>
    <collection role="DFGFachsystematik" number="1">Ingenieurwissenschaften</collection>
    <collection role="othforschungsschwerpunkt" number="">Materialien und Produktion</collection>
  </doc>
  <doc>
    <id>8841</id>
    <completedYear/>
    <publishedYear>2026</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>20</pageNumber>
    <edition/>
    <issue/>
    <volume/>
    <type>article</type>
    <publisherName>Springer</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Mechanical and structural characterization of heat-staked parts realized by selective laser sintering of polyamide 12</title>
    <abstract language="eng">Heat staking is a joining process in which thermoplastic pins are formed by heat and pressure in a form-fitting and insoluble way. This study evaluates the mechanical performance and microstructure of selective laser sintered (SLS) polyamide 12 (PA 12) components before and after heat staking, compared with conventionally turned reference specimens. The components were characterized using tensile tests, micrographs, microscopy, and micro-CT measurements. For the tests, the forces and temperatures during heat staking were varied to determine the best process parameters. Tensile tests revealed that SLS joints achieved strengths of up to 33.6 MPa, approaching the 39.9 MPa of the turned references. Microstructural analysis showed a marked reduction in porosity due to heat staking. Porosity decreased from 3.9% to 1.56% at a staking force of 300 N and from 4.29% to 0.81% at 1000 N, highlighting the beneficial effect of increased force. These results demonstrate that heat staking parameters significantly influence local densification and mechanical performance, and that, under suitable conditions, SLS components can achieve joint strengths comparable to conventionally manufactured parts. The study shows that the heat staking process parameters have a significant influence on the local microstructure and thus on the mechanical performance and provides a basis for optimizing SLS components for new heat staking applications.</abstract>
    <parentTitle language="eng">The International Journal of Advanced Manufacturing Technology</parentTitle>
    <identifier type="doi">10.1007/s00170-025-17319-4</identifier>
    <enrichment key="CorrespondingAuthor">Andreas Kuettner</enrichment>
    <enrichment key="BegutachtungStatus">peer-reviewed</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <licence>Creative Commons - CC BY - Namensnennung 4.0 International</licence>
    <author>Andreas Kuettner</author>
    <author>Samuel Fischer</author>
    <author>Tobias Laumer</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Additive manufacturing</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Heat staking</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Material qualification</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polyamid 12 (PA)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Selective laser sintering (SLS)</value>
    </subject>
    <collection role="institutes" number="FAKMB">Fakultät Maschinenbau</collection>
    <collection role="oaweg" number="">Hybrid Open Access - OA-Veröffentlichung in einer Subskriptionszeitschrift/-medium</collection>
    <collection role="oaweg" number="">Corresponding author der OTH Regensburg</collection>
    <collection role="funding" number="">DEAL Springer Nature</collection>
    <collection role="institutes" number="">Labor Additive and Intelligent Manufacturing for Sustainability (AIMS)</collection>
    <collection role="DFGFachsystematik" number="1">Ingenieurwissenschaften</collection>
    <collection role="othforschungsschwerpunkt" number="">Materialien und Produktion</collection>
  </doc>
  <doc>
    <id>8878</id>
    <completedYear/>
    <publishedYear>2025</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>30</pageFirst>
    <pageLast>41</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>144</volume>
    <type>article</type>
    <publisherName>Elsevier</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Performance assessment of a green hydrogen-based household energy system supported by a battery storage at different resolutions of the electrical load profile</title>
    <abstract language="eng">Hydrogen deems quite suitable for medium- and long-term energy storage of surplus renewable electricity. Nowadays, all-in-one solutions consisting of an electrolyzer, a compressor, pressurized hydrogen storage tanks, a fuel cell (FC) and the necessary peripheral components are available for single family houses. This work presents a comparative assessment of the system’s key performance indicators in a household system with three market available FCs with the nominal powers of 0.8, 1.4 and 7.8 kW. The design tool developed for the assessment of the hybrid energy system along with two energy management system configurations are introduced. An electrochemical and thermal model widely applied in the literature is used to model the FCs, which is validated against the available experimental data in the literature for all three FCs. The influence of the FCs’ nominal power, their power dynamic operation range, the use of a battery storage with different capacities and the load profile’s resolution have been technically assessed regarding the system’s self-sufficiency (SS), the FC’s efficiency, full-load operating hours, and number of on/off cycles. It turned out that, the system performance is strongly dependent on the nominal power of the FC and its power dynamic operation range. If no battery-storage is applied, the complete grid independence is not possible, and a high resolution of the load profile is indispensable in the assessment of the system design. A hybrid energy system comprising the 1.4 kW FC, a PV system of 10 kW peak power and a battery of 15 kW storage capacity showed a degree of SS of 98%. The number of the full-load operating hours and on/off cycles of that FC amount to 768 and 116 cycles, respectively. Such promising results are referred to the high dynamic operation range of the battery, and its high discharge power capacity, which makes it more suitable to cover a remarkably higher fraction of the load deficit, if compared to a system without a battery.</abstract>
    <parentTitle language="eng">International Journal of Hydrogen Energy</parentTitle>
    <identifier type="issn">0360-3199</identifier>
    <identifier type="doi">10.1016/j.ijhydene.2025.04.431</identifier>
    <note>Corresponding author der OTH Regensburg: Dawoud, Belal</note>
    <enrichment key="opus_doi_flag">true</enrichment>
    <enrichment key="local_crossrefDocumentType">journal-article</enrichment>
    <enrichment key="local_crossrefLicence">https://www.elsevier.com/tdm/userlicense/1.0/</enrichment>
    <enrichment key="local_import_origin">crossref</enrichment>
    <enrichment key="BegutachtungStatus">peer-reviewed</enrichment>
    <enrichment key="opus.source">doi-import</enrichment>
    <enrichment key="CorrespondingAuthor">Belal Dawoud</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <licence>Creative Commons - CC BY - Namensnennung 4.0 International</licence>
    <author>Jeremy Weindler</author>
    <author>Hannes Lehner</author>
    <author>J. Eckstein</author>
    <author>Belal Dawoud</author>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Hybrid energy storage</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Battery</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Hydrogen</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Fuel cell</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>PV</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Load profile resolution</value>
    </subject>
    <collection role="institutes" number="FAKMB">Fakultät Maschinenbau</collection>
    <collection role="oaweg" number="">Hybrid Open Access - OA-Veröffentlichung in einer Subskriptionszeitschrift/-medium</collection>
    <collection role="oaweg" number="">Corresponding author der OTH Regensburg</collection>
    <collection role="funding" number="">DEAL Elsevier</collection>
    <collection role="DFGFachsystematik" number="1">Ingenieurwissenschaften</collection>
    <collection role="othforschungsschwerpunkt" number="">Nachhaltige Lebensräume</collection>
  </doc>
  <doc>
    <id>8877</id>
    <completedYear/>
    <publishedYear>2024</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>15</pageNumber>
    <edition/>
    <issue/>
    <volume>242</volume>
    <type>article</type>
    <publisherName>Elsevier</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Experimental investigation of a small-scale continuous flow ohmic heating reactor for a highly effective conversion of renewable electricity surpluses into heat</title>
    <abstract language="eng">Sector coupling is expected to play a decisive role as a key technology to realize the energy transition towards green energy supply. This work introduces, therefore, a comprehensive experimental study on a new power-to-heat system based on the continuous-flow, ohmic heating principle, which aims at utilizing renewable electricity in green processes. The ohmic heating technology, which is widely applied in the food industry, has been adapted and evaluated for delivering heat and domestic hot water to a single-family house. The introduced prototype is designed to convert renewable electricity into heat in the power range between 1000 and 3000 W with a typical electrical household installation (230 V, 50 Hz and 16 A fuse). A dedicated test rig has been developed and a comprehensive experimental campaign has been carried out to investigate the performance of the introduced system under typical operating conditions of a single-family house. Both the conversion efficiency and the dynamics of the thermal response of the introduced system have been assessed. It turned out that, the temperature lift between the return and supply of the reactor, and consequently, the conversion efficiency of electrical into thermal energy, are independent on the return temperature, for a fixed value of the volume flow rate of the electrolyte solution. A remarkable steady-state conversion efficiency of 97.5% has been measured. In addition, the dynamic response of the ohmic heating system has been found to be strongly dependent on the desired temperature lift. By an implemented controller, 95% of the steady state temperature lift of 44.5 K can be realized in 50 s, which marks an exceptionally rapid thermal response. The obtained results pave the way towards a field test study of the developed technology in a real household installation as well as to extend the focus on new fields such as green chemical processes.</abstract>
    <parentTitle language="eng">Applied Thermal Engineering</parentTitle>
    <identifier type="issn">1359-4311</identifier>
    <identifier type="doi">10.1016/j.applthermaleng.2024.122401</identifier>
    <note>Corresponding author der OTH Regensburg: Dawoud, Belal</note>
    <enrichment key="opus_doi_flag">true</enrichment>
    <enrichment key="local_crossrefDocumentType">journal-article</enrichment>
    <enrichment key="local_crossrefLicence">https://www.elsevier.com/tdm/userlicense/1.0/</enrichment>
    <enrichment key="local_import_origin">crossref</enrichment>
    <enrichment key="BegutachtungStatus">peer-reviewed</enrichment>
    <enrichment key="opus.source">doi-import</enrichment>
    <enrichment key="CorrespondingAuthor">Belal Dawoud</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <licence>Creative Commons - CC BY-NC-ND - Namensnennung - Nicht kommerziell - Keine Bearbeitungen 4.0 International</licence>
    <author>Jeremy Weindler</author>
    <author>Belal Dawoud</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>renewable energy</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Ohmic-heating</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Power-to-heat</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Sector coupling</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Energy surpluses</value>
    </subject>
    <collection role="institutes" number="FAKMB">Fakultät Maschinenbau</collection>
    <collection role="oaweg" number="">Hybrid Open Access - OA-Veröffentlichung in einer Subskriptionszeitschrift/-medium</collection>
    <collection role="oaweg" number="">Corresponding author der OTH Regensburg</collection>
    <collection role="funding" number="">DEAL Elsevier</collection>
    <collection role="DFGFachsystematik" number="1">Ingenieurwissenschaften</collection>
    <collection role="othforschungsschwerpunkt" number="">Nachhaltige Lebensräume</collection>
  </doc>
  <doc>
    <id>8888</id>
    <completedYear/>
    <publishedYear>2026</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>22</pageNumber>
    <edition/>
    <issue/>
    <volume>453</volume>
    <type>article</type>
    <publisherName>Elsevier</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2026-02-17</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Model order reduction for unbounded second-order vibroacoustic systems using infinite elements and Dirichlet-to-Neumann map</title>
    <abstract language="eng">This work addresses the efficient numerical simulation of time-harmonic vibroacoustic problems in unbounded domains, with a focus on fluid-structure interaction. The underlying mathematical model is a second-order dynamical system arising from the coupling of structural and acoustic domains, incorporating material damping effects, relevant in structural acoustics and noise control applications. A central novelty of the proposed method is its unified computational framework that supports two distinct strategies for treating unbounded fluid domains: (1) non-local absorbing boundary conditions based on Dirichlet-to-Neumann map, and (2) infinite elements, which extend the computational domain rather than truncate it. Both approaches are integrated into a consistent formulation that enables flexible and accurate modeling of exterior wave propagation. To efficiently evaluate frequency-domain transfer functions, the method employs model order reduction using the Padé-via-Lanczos technique. While this algorithm typically targets first-order systems, the present approach uses a Schur complement strategy to reduce the second-order system in a way that maintains computational efficiency and storage requirements comparable to first-order formulations. Importantly, the framework seamlessly embeds both interior structural damping and the additional dissipation introduced by the acoustic-domain truncation into the model-order reduction process. The exterior acoustic field is represented via spherical harmonic expansions, with expansion coefficients computed from the reduced system. Numerical results demonstrate the method’s accuracy, efficiency, and scalability, making it well-suited for high-fidelity vibroacoustic analysis in unbounded domains.</abstract>
    <parentTitle language="eng">Computer Methods in Applied Mechanics and Engineering</parentTitle>
    <identifier type="doi">10.1016/j.cma.2026.118846</identifier>
    <enrichment key="BegutachtungStatus">peer-reviewed</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="CorrespondingAuthor">Christopher Sittl</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <licence>Creative Commons - CC BY - Namensnennung 4.0 International</licence>
    <author>Christopher Sittl</author>
    <author>Steffen Marburg</author>
    <author>Elke Deckers</author>
    <author>Marcus Wagner</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Lanczos algorithm</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Krylov-subspace projection</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Dirichlet-to-Neumann map</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Infinite elements</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Padé approximation</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Fluid-structure interaction</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Acoustics</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Spherical harmonics</value>
    </subject>
    <collection role="institutes" number="FAKMB">Fakultät Maschinenbau</collection>
    <collection role="oaweg" number="">Hybrid Open Access - OA-Veröffentlichung in einer Subskriptionszeitschrift/-medium</collection>
    <collection role="oaweg" number="">Corresponding author der OTH Regensburg</collection>
    <collection role="funding" number="">DEAL Elsevier</collection>
    <collection role="DFGFachsystematik" number="1">Ingenieurwissenschaften</collection>
    <collection role="othforschungsschwerpunkt" number="">Digitale Transformation</collection>
  </doc>
  <doc>
    <id>8946</id>
    <completedYear/>
    <publishedYear>2026</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>17</pageNumber>
    <edition/>
    <issue/>
    <volume/>
    <type>article</type>
    <publisherName>Springer Nature</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Eigenvalue perturbation in drivetrain analysis and redesign</title>
    <abstract language="eng">The optimisation of the dynamic behavior of drive systems often involves targeted modifications of the system characteristics. Structural and parametric modifications are used to satisfy the constraints of the dynamic requirements. However, many optimisations are still achieved by intuition or parameter variations, even though more streamlined and easy-to-implement tools such as the eigenvalue perturbation method are available. In this article, the eigenvalue perturbation method in the form of an eigenvalue sensitivity analysis is used to efficiently optimise the dynamic behavior for two different use cases using different optimisation measures. This paper demonstrates how eigenvalue perturbation theory can efficiently optimise drivetrain dynamics by systematically modifying system parameters. Two case studies show how eigenvalue sensitivity analysis achieves targeted frequency shifts to avoid resonances: (1) adapting shaft stiffness and control parameters in a torsional drivetrain, and (2) adjusting structural modifications in a wind turbine bedplate. The study introduces the eigenvector tensor product as a weighting matrix, identifying key parameters for effective redesign. Compared to conventional parameter studies, this method enables precise control over system dynamics with minimal computational effort, making it highly applicable for vibration mitigation and drivetrain optimisation.</abstract>
    <parentTitle language="eng">Multibody System Dynamics</parentTitle>
    <identifier type="issn">1384-5640</identifier>
    <identifier type="doi">10.1007/s11044-026-10155-8</identifier>
    <note>Corresponding author der OTH Regensburg: Carsten Schulz</note>
    <enrichment key="opus_doi_flag">true</enrichment>
    <enrichment key="opus_import_data">{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,13]],"date-time":"2026-03-13T16:28:54Z","timestamp":1773419334979,"version":"3.50.1"},"reference-count":24,"publisher":"Springer Science and Business Media LLC","license":[{"start":{"date-parts":[[2026,3,13]],"date-time":"2026-03-13T00:00:00Z","timestamp":1773360000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2026,3,13]],"date-time":"2026-03-13T00:00:00Z","timestamp":1773360000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"name":"Ostbayerische Technische Hochschule Regensburg"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Multibody Syst Dyn"],"abstract":"&lt;jats:title&gt;Abstract&lt;\/jats:title&gt;\n                  &lt;jats:p&gt;The optimisation of the dynamic behavior of drive systems often involves targeted modifications of the system characteristics. Structural and parametric modifications are used to satisfy the constraints of the dynamic requirements. However, many optimisations are still achieved by intuition or parameter variations, even though more streamlined and easy-to-implement tools such as the eigenvalue perturbation method are available. In this article, the eigenvalue perturbation method in the form of an eigenvalue sensitivity analysis is used to efficiently optimise the dynamic behavior for two different use cases using different optimisation measures. This paper demonstrates how eigenvalue perturbation theory can efficiently optimise drivetrain dynamics by systematically modifying system parameters. Two case studies show how eigenvalue sensitivity analysis achieves targeted frequency shifts to avoid resonances: (1) adapting shaft stiffness and control parameters in a torsional drivetrain, and (2) adjusting structural modifications in a wind turbine bedplate. The study introduces the eigenvector tensor product as a weighting matrix, identifying key parameters for effective redesign. Compared to conventional parameter studies, this method enables precise control over system dynamics with minimal computational effort, making it highly applicable for vibration mitigation and drivetrain optimisation.&lt;\/jats:p&gt;","DOI":"10.1007\/s11044-026-10155-8","type":"journal-article","created":{"date-parts":[[2026,3,13]],"date-time":"2026-03-13T14:15:24Z","timestamp":1773411324000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Eigenvalue perturbation in drivetrain analysis and redesign"],"prefix":"10.1007","author":[{"given":"Carsten","family":"Schulz","sequence":"first","affiliation":[]},{"given":"Henry","family":"Grane\u00df","sequence":"additional","affiliation":[]},{"given":"Stefan","family":"Weinzierl","sequence":"additional","affiliation":[]},{"given":"Johannes","family":"Nicklas","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2026,3,13]]},"reference":[{"key":"10155_CR1","doi-asserted-by":"publisher","first-page":"590","DOI":"10.1017\/S0368393100077385","volume":"66","author":"W.H. Wittrick","year":"1962","unstructured":"Wittrick, W.H.: Rates of change of eigenvalues, with reference to buckling and vibration problems. J. R. Aeronaut. Soc. 66, 590 (1962). https:\/\/doi.org\/10.1017\/S0368393100077385","journal-title":"J. R. Aeronaut. Soc."},{"issue":"12","key":"10155_CR2","doi-asserted-by":"publisher","first-page":"2426","DOI":"10.2514\/3.5008","volume":"6","author":"R.L. Fox","year":"1968","unstructured":"Fox, R.L., Kapoor, M.P.: Rates of change of eigenvalues and eigenvectors. AIAA J. 6(12), 2426\u20132429 (1968). https:\/\/doi.org\/10.2514\/3.5008","journal-title":"AIAA J."},{"issue":"2","key":"10155_CR3","doi-asserted-by":"publisher","first-page":"250","DOI":"10.2514\/3.6740","volume":"11","author":"R.H. Plaut","year":"1973","unstructured":"Plaut, R.H., Huseyin, K.: Derivatives of eigenvalues and eigenvectors in non-self-adjoint systems. AIAA J. 11(2), 250\u2013251 (1973). https:\/\/doi.org\/10.2514\/3.6740","journal-title":"AIAA J."},{"issue":"3","key":"10155_CR4","doi-asserted-by":"publisher","first-page":"337","DOI":"10.1002\/nme.1620050305","volume":"5","author":"K.M. Romstad","year":"1973","unstructured":"Romstad, K.M., Hutchinson, J.R., Runge, K.H.: Design parameter variation and structural response. Int. J. Numer. Methods Eng. 5(3), 337\u2013349 (1973). https:\/\/doi.org\/10.1002\/nme.1620050305","journal-title":"Int. J. Numer. Methods Eng."},{"issue":"1","key":"10155_CR5","doi-asserted-by":"publisher","first-page":"37","DOI":"10.1016\/S0022-460X(86)81421-3","volume":"111","author":"K.R. Chung","year":"1986","unstructured":"Chung, K.R., Lee, C.W.: Dynamic reanalysis of weakly non-proportionally damped systems. J. Sound Vib. 111(1), 37\u201350 (1986). https:\/\/doi.org\/10.1016\/S0022-460X(86)81421-3","journal-title":"J. Sound Vib."},{"issue":"5","key":"10155_CR6","doi-asserted-by":"publisher","first-page":"427","DOI":"10.1002\/cnm.1640090508","volume":"9","author":"S.H. Chen","year":"1993","unstructured":"Chen, S.H., Liu, Z.S., Shao, C.S., Zhao, Y.Q.: Perturbation analysis of vibration modes with close frequencies. Commun. Numer. Methods Eng. 9(5), 427\u2013438 (1993). https:\/\/doi.org\/10.1002\/cnm.1640090508","journal-title":"Commun. Numer. Methods Eng."},{"issue":"2","key":"10155_CR7","doi-asserted-by":"publisher","first-page":"265","DOI":"10.1006\/jsvi.1999.2307","volume":"228","author":"J.K. Liu","year":"1999","unstructured":"Liu, J.K., Chan, H.C.: A universal matrix perturbation technique for structural dynamic modification using singular value decomposition. J. Sound Vib. 228(2), 265\u2013274 (1999). https:\/\/doi.org\/10.1006\/jsvi.1999.2307","journal-title":"J. Sound Vib."},{"key":"10155_CR8","doi-asserted-by":"publisher","unstructured":"Li, L., Hu, Y., Wang, X.: A study on design sensitivity analysis for general nonlinear eigenproblems mechanical systems and signal processing. 34(1\u20132), 88\u2013105 (2013). https:\/\/doi.org\/10.1016\/j.ymssp.2012.08.011. ISSN 0888-3270","DOI":"10.1016\/j.ymssp.2012.08.011"},{"key":"10155_CR9","doi-asserted-by":"publisher","DOI":"10.1155\/2018\/8609138","author":"P.D. Cha","year":"2018","unstructured":"Cha, P.D., Shin, A.: Perturbation methods for the eigencharacteristics of symmetric and asymmetric systems. Shock Vib. 2018 (2018). https:\/\/doi.org\/10.1155\/2018\/8609138","journal-title":"Shock Vib."},{"issue":"2","key":"10155_CR10","doi-asserted-by":"publisher","first-page":"160","DOI":"10.7227\/IJMEE.36.2.6","volume":"36","author":"P.D. Cha","year":"2012","unstructured":"Cha, P.D., Solberg, K.A.: Applying eigenvalue perturbation theory to solve problems in structural dynamics. Int. J. Mech. Eng. Educ. 36(2), 160\u2013175 (2012). https:\/\/doi.org\/10.7227\/IJMEE.36.2.6","journal-title":"Int. J. Mech. Eng. Educ."},{"issue":"3","key":"10155_CR11","doi-asserted-by":"publisher","first-page":"402","DOI":"10.1016\/j.compstruct.2005.11.007","volume":"78","author":"L. Yu","year":"2007","unstructured":"Yu, L., Cheng, L., Yam, L.H., Yan, Y.J.: Application of eigenvalue perturbation theory for detecting small structural damage using dynamic responses. Compos. Struct. 78(3), 402\u2013409 (2007). https:\/\/doi.org\/10.1016\/j.compstruct.2005.11.007","journal-title":"Compos. Struct."},{"issue":"4","key":"10155_CR12","doi-asserted-by":"publisher","first-page":"454","DOI":"10.2514\/3.7119","volume":"14","author":"K.A. Stetson","year":"1976","unstructured":"Stetson, K.A., Palma, G.E.: Inversion of first-order perturbation theory and its application to structural design. AIAA J. 14(4), 454\u2013460 (1976). https:\/\/doi.org\/10.2514\/3.7119","journal-title":"AIAA J."},{"issue":"9","key":"10155_CR13","doi-asserted-by":"publisher","first-page":"1310","DOI":"10.2514\/3.8245","volume":"21","author":"K.-O. Kim","year":"1983","unstructured":"Kim, K.-O., Anderson, W.J., Sandstrom, R.E.: Nonlinear inverse perturbation method in dynamic analysis. AIAA J. 21(9), 1310\u20131316 (1983). https:\/\/doi.org\/10.2514\/3.8245","journal-title":"AIAA J."},{"issue":"9","key":"10155_CR14","doi-asserted-by":"publisher","first-page":"1304","DOI":"10.2514\/3.8777","volume":"22","author":"C.J. Hoff","year":"1984","unstructured":"Hoff, C.J., Bernitsas, M.M., Sandstrom, R.E., Anderson, W.J.: Inverse perturbation method for structural redesign with frequency and mode shape constraints. AIAA J. 22(9), 1304\u20131309 (1984). https:\/\/doi.org\/10.2514\/3.8777","journal-title":"AIAA J."},{"issue":"4","key":"10155_CR15","doi-asserted-by":"publisher","first-page":"1045","DOI":"10.1177\/1461348418756026","volume":"37","author":"J. Zhang","year":"2018","unstructured":"Zhang, J., Ye, J., Ouyang, H., Yin, X.: An explicit formula of perturbating stiffness matrix for partial natural frequency assignment using static output feedback. J. Low Freq. Noise Vib. Act. Control 37(4), 1045\u20131052 (2018)","journal-title":"J. Low Freq. Noise Vib. Act. Control"},{"key":"10155_CR16","doi-asserted-by":"publisher","DOI":"10.1016\/j.ymssp.2019.106536","author":"R.M. Lin","year":"2020","unstructured":"Lin, R.M., Mottershead, J.E., Ng, T.Y.: A state-of-the-art review on theory and engineering applications of eigenvalue and eigenvector derivatives. Mech. Syst. Signal Process. 138 (2020). https:\/\/doi.org\/10.1016\/j.ymssp.2019.106536","journal-title":"Mech. Syst. Signal Process."},{"key":"10155_CR17","doi-asserted-by":"publisher","DOI":"10.1016\/j.ymssp.2023.110894","author":"M. Aenlle","year":"2024","unstructured":"Aenlle, M., Pacheco-Ch\u00e9rrez, J., Brincker, R.: Sensitivity analysis of a system with two closely spaced modes using structural dynamic modification. Mech. Syst. Signal Process. 206 (2024). https:\/\/doi.org\/10.1016\/j.ymssp.2023.110894","journal-title":"Mech. Syst. Signal Process."},{"key":"10155_CR18","doi-asserted-by":"publisher","DOI":"10.1137\/1030117","volume-title":"Design Sensitivity Analysis of Structural Systems","author":"E.J. Haug","year":"1986","unstructured":"Haug, E.J., Choi, K.K., Komkov, V.: Design Sensitivity Analysis of Structural Systems. Academic Press Inc., Florida (1986). https:\/\/doi.org\/10.1137\/1030117"},{"key":"10155_CR19","unstructured":"Schulz, C.: Ganzheitliche Systemanalyse von Schaufelradantrieben. Phd-Thesis, Dresden (2014)"},{"key":"10155_CR20","unstructured":"Grane\u00df, H.: Raupenfahrzeug-Dynamik. Phd-Thesis, Dresden (2018)"},{"key":"10155_CR21","unstructured":"Schwarz, C.: Indirekte modellpr\u00e4diktive Regelung von Windenergieanlagen sowie deren energie-optimale und deren sch\u00e4digungsarme Konfiguration. Phd-Thesis, Dresden (2023)"},{"key":"10155_CR22","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-540-87694-6","volume-title":"Maschinendynamik","author":"H. Dresig","year":"2007","unstructured":"Dresig, H., Holzwei\u00dfig, F.: Maschinendynamik, 8th edn. Springer, Berlin (2007). https:\/\/doi.org\/10.1007\/978-3-540-87694-6","edition":"8"},{"key":"10155_CR23","unstructured":"Mtauweg, S.: Dynamische Untersuchung des Pitch- und Azimutsystems und der zugeh\u00f6rigen Regelstrategien einer Windenergieanlage mittels Mehrk\u00f6rpersimulation. Phd-Thesis, Dresden (2012)"},{"key":"10155_CR24","unstructured":"Rosenl\u00f6cher, T.: Systematisierung des Modellierungsprozesses zur Erstellung elastischer Mehrk\u00f6rpersystem-Modelle und dynamischen Untersuchung von Gro\u00dfantrieben. Phd-Thesis, Dresden (2012)"}],"container-title":["Multibody System Dynamics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s11044-026-10155-8.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/article\/10.1007\/s11044-026-10155-8","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s11044-026-10155-8.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,3,13]],"date-time":"2026-03-13T14:15:27Z","timestamp":1773411327000},"score":1,"resource":{"primary":{"URL":"https:\/\/link.springer.com\/10.1007\/s11044-026-10155-8"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,3,13]]},"references-count":24,"alternative-id":["10155"],"URL":"https:\/\/doi.org\/10.1007\/s11044-026-10155-8","relation":{},"ISSN":["1384-5640","1573-272X"],"issn-type":[{"value":"1384-5640","type":"print"},{"value":"1573-272X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,3,13]]},"assertion":[{"value":"3 April 2025","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"18 February 2026","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"13 March 2026","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"The authors declare no competing interests.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}]}}</enrichment>
    <enrichment key="local_crossrefDocumentType">journal-article</enrichment>
    <enrichment key="CorrespondingAuthor">Carsten Schulz</enrichment>
    <enrichment key="local_import_origin">crossref</enrichment>
    <enrichment key="local_doiImportPopulated">PersonAuthorFirstName_1,PersonAuthorLastName_1,PersonAuthorFirstName_2,PersonAuthorLastName_2,PersonAuthorFirstName_3,PersonAuthorLastName_3,PersonAuthorFirstName_4,PersonAuthorLastName_4,PublisherName,TitleMain_1,Language,TitleAbstract_1,TitleParent_1,CompletedYear,IdentifierIssn,Enrichmentlocal_crossrefLicence</enrichment>
    <enrichment key="BegutachtungStatus">peer-reviewed</enrichment>
    <enrichment key="opus.source">doi-import</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <licence>Creative Commons - CC BY - Namensnennung 4.0 International</licence>
    <author>Carsten Schulz</author>
    <author>Henry Graneß</author>
    <author>Stefan Weinzierl</author>
    <author>Johannes Nicklas</author>
    <collection role="institutes" number="FAKMB">Fakultät Maschinenbau</collection>
    <collection role="oaweg" number="">Hybrid Open Access - OA-Veröffentlichung in einer Subskriptionszeitschrift/-medium</collection>
    <collection role="oaweg" number="">Corresponding author der OTH Regensburg</collection>
    <collection role="funding" number="">DEAL Springer Nature</collection>
    <collection role="DFGFachsystematik" number="1">Ingenieurwissenschaften</collection>
    <collection role="othforschungsschwerpunkt" number="">Digitale Transformation</collection>
  </doc>
  <doc>
    <id>9043</id>
    <completedYear/>
    <publishedYear>2026</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>18</pageNumber>
    <edition/>
    <issue/>
    <volume>6</volume>
    <type>article</type>
    <publisherName>Frontiers</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Automated deep learning based detection of cellular deposits on clinically used ECMO membrane lungs</title>
    <abstract language="eng">Introduction:&#13;
&#13;
Despite the promising application of extracorporeal membrane oxygenation (ECMO) in the treatment of critically ill patients, coagulation-associated technical complications, primarily clot formation and critical bleeding, remain a major challenge during ECMO therapy. The deposition of nucleated cells on the surface has been shown, yet the role of these cells towards complication development is still matter of ongoing research. In particular, the membrane lung (MemL) is prone to clot formation. Therefore, the investigation of nuclear deposits on its hollow-fibers may provide insights for a better understanding of the cellular mechanisms involved in the development of ECMO complications.&#13;
&#13;
Methods:&#13;
&#13;
To support current research, this study aimed to develop a deep learning–based tool for the automated detection and quantitative analysis of nuclear depositions on MemL hollow-fiber mats. A customized fluorescence microscopy workflow, combined with a semi-automated iterative labeling strategy, was used to generate a high-quality dataset for model training.&#13;
&#13;
Results:&#13;
&#13;
Six configurations of instance segmentation models were evaluated, with a Mask R-CNN with ResNet 101 backbone using dilated convolution providing the most balanced performance in both nuclei count and area accuracy. Compared with U-Net–based approaches such as Cellpose or StarDist, the proposed model demonstrated superior segmentation of overlapping and low-intensity nuclei, maintaining accuracy even in densely packed cellular regions.&#13;
&#13;
Discussion:&#13;
&#13;
We present an automated image analysis tool for clinically used MemLs, which exhibit complex three-dimensional hollow-fiber architectures and irregular cellular deposits that challenge conventional tools. A dedicated graphical user interface enables streamlined detection, morphometric analysis, and spatial clustering of nuclei, establishing a reproducible workflow for high-throughput analysis of fluorescence microscopy images. This approach eliminates labor-intensive manual counting and facilitates large-scale studies on cell-fiber interactions and disease-related correlations.</abstract>
    <parentTitle language="eng">Frontiers in Bioinformatics</parentTitle>
    <identifier type="doi">10.3389/fbinf.2026.1771574</identifier>
    <note>Corresponding author der OTH Regensburg: Daniel Pointner, Lars Krenkel</note>
    <enrichment key="opus.import.date">2026-04-01T15:49:56+00:00</enrichment>
    <enrichment key="opus.source">sword</enrichment>
    <enrichment key="opus.import.user">importuser</enrichment>
    <enrichment key="CorrespondingAuthor">Pointner, Daniel ; Krenkel, Lars</enrichment>
    <enrichment key="BegutachtungStatus">peer-reviewed</enrichment>
    <licence>Creative Commons - CC BY - Namensnennung 4.0 International</licence>
    <author>Daniel Pointner</author>
    <author>Michael Kranz</author>
    <author>Maria Stella Wagner</author>
    <author>Moritz Haus</author>
    <author>Karla Lehle</author>
    <author>Lars Krenkel</author>
    <collection role="institutes" number="FAKMB">Fakultät Maschinenbau</collection>
    <collection role="institutes" number="RCBE">Regensburg Center of Biomedical Engineering - RCBE</collection>
    <collection role="oaweg" number="">Gold Open Access- Erstveröffentlichung in einem/als Open-Access-Medium</collection>
    <collection role="persons" number="krenkellbfmconf">Krenkel, Lars (Prof. Dr.), Präsentationen - Labor Biofluidmechanik</collection>
    <collection role="oaweg" number="">Corresponding author der OTH Regensburg</collection>
    <collection role="institutes" number="">Labor Biofluidmechanik</collection>
    <collection role="persons" number="krenkellbfmpub">Krenkel, Lars (Prof. Dr.), Publikationen - Labor Biofluidmechanik</collection>
    <collection role="DFGFachsystematik" number="1">Ingenieurwissenschaften</collection>
    <collection role="othforschungsschwerpunkt" number="">Gesundheit und Soziales</collection>
  </doc>
</export-example>
