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    <title language="eng">Method and System for Evaluating a Structural Integrity of an Aerial Vehicle</title>
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    <enrichment key="PatentLand">Vereinigten Staaten von Amerika</enrichment>
    <enrichment key="PatentYear">2020</enrichment>
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    <author>Florian Olbrich</author>
    <author>Christian Pongratz</author>
    <author>Rudolf Bierl</author>
    <author>Ingo Ehrlich</author>
    <collection role="institutes" number="FakANK">Fakultät Angewandte Natur- und Kulturwissenschaften</collection>
    <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="persons" number="bierlsappz">Bierl, Rudolf (Prof. Dr.) - Sensorik-ApplikationsZentrum</collection>
    <collection role="othforschungsschwerpunkt" number="16317">Sensorik</collection>
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    <creatingCorporation>Society of Petroleum Engineers</creatingCorporation>
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    <title language="eng">Validated Multiphysics Modeling For Advanced Pipeline Integrity Management</title>
    <abstract language="eng">The aim of this paper is to present practical steps for utilizing a validated multiphysics approach for fracture control in CO2 pipelines within the framework of Carbon Capture Transport and Storage (CCTS). Ensuring the arrest of running ductile fracture (RDF) is a crucial safety requirement for the transportation of dense-phase CO2. However, current standards rely on outdated and restrictive methods, imposing severe limitations on pipeline material and structural design. As a result, projects that fall outside these standards face the need for extremely costly tests, often leading to delays or cancellations of CCTS initiatives.&#13;
This study introduces an advanced, validated, fully-coupled fluid-structure interaction (FSI) model designed to accurately predict fracture propagation in CO2 pipelines. A key advantage of this approach is its use of robust and reproducible calibration and validation procedures combined with high-quality material characterization data. The full coupling of structural, fluid, and backfill models is essential for obtaining precise results, not only in determining arrest occurrence but also in analyzing properties such as fracture velocity history, 3D pressure distributions behind the propagating crack, wall thinning, and crack tip opening angle. The FSI model has demonstrated its value as a cost-effective tool for safety assessments, enabling the development of fracture control plans that specify minimum required material properties and fluid compositions for optimized pipeline design, both onshore and offshore. Additionally, performing virtual studies with the parameterized FSI model enables the generation of synthetic data for training and validating a machine learning surrogate model. This surrogate model can be integrated into industrial practices, facilitating the application of multiphysics modeling without the need for extensive expertise.</abstract>
    <parentTitle language="eng">ADIPEC, November 4–7, 2024, Abu Dhabi, UAE</parentTitle>
    <identifier type="doi">10.2118/222279-MS</identifier>
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    <author>Aida Nonn</author>
    <author>P. Marx</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="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>
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    <completedYear/>
    <publishedYear>2021</publishedYear>
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    <language>eng</language>
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    <title language="eng">The effect of curvature on the low-velocity impact resistance of CF/PEEK laminates</title>
    <parentTitle language="eng">30 Years IVW Anniversary Colloquium, Leibnitz-Institut für Verbundwerkstoffe Kaiserslautern, 2021</parentTitle>
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    <author>Florian Schimmer</author>
    <author>Jakob Gebhardt</author>
    <author>N. Motsch-Eichmann</author>
    <author>Joachim M. Hausmann</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>
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    <publishedYear>2026</publishedYear>
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    <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>
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    <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>
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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. 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    <author>Yu Qiao</author>
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    <issue>6</issue>
    <volume>49</volume>
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    <title language="eng">Sensitivity of lumbar spine loading to anatomical parameters</title>
    <abstract language="eng">Musculoskeletal simulations of lumbar spine loading rely on a geometrical representation of the anatomy. However, this data has an inherent inaccuracy. This study evaluates the influence of defined geometrical parameters on lumbar spine loading utilising five parametrised musculoskeletal lumbar spine models for four different postures. The influence of the dimensions of vertebral body, disc, posterior parts of the vertebrae as well as the curvature of the lumbar spine was studied. Additionally, simulations with combinations of selected parameters were conducted. Changes in L4/L5 resultant joint force were used as outcome variable. Variations of the vertebral body height, disc height, transverse process width and the curvature of the lumbar spine were the most influential.&#13;
&#13;
These parameters can be easily acquired from X-rays and should be used to morph a musculoskeletal lumbar spine model for subject-specific approaches with respect to bone geometry. Furthermore, the model was very sensitive to uncommon configurations and therefore, it is advised that stiffness properties of discs and ligaments should be individualised.</abstract>
    <parentTitle language="eng">Journal of Biomechanics</parentTitle>
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    <author>Ingo Ehrlich</author>
    <author>John Rasmussen</author>
    <author>Norbert Gebbeken</author>
    <author>Sebastian Dendorfer</author>
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      <value>Musculoskeletal simulation</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Lumbar spine</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Parameter study</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Vertebra</value>
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    <subject>
      <language>deu</language>
      <type>swd</type>
      <value>Wirbelsäule</value>
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    <subject>
      <language>deu</language>
      <type>swd</type>
      <value>Belastung</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>swd</type>
      <value>Simulation</value>
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    <collection role="persons" number="dendorferlbm">Dendorfer, Sebastian (Prof. Dr.), Zeitschriftenbeiträge - Labor Biomechanik</collection>
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    <collection role="persons" number="ehrlichlft">Ehrlich, Ingo (Prof. Dr.) - Labor Faserverbundtechnik</collection>
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    <title language="eng">Computational analysis of the effects of geometric irregularities and post-processing steps on the mechanical behavior of additively manufactured 316L stainless steel stents</title>
    <abstract language="eng">Advances in additive manufacturing enable the production of tailored lattice structures and thus, in principle, coronary stents. This study investigates the effects of process-related irregularities, heat and surface treatment on the morphology, mechanical response, and expansion behavior of 316L stainless steel stents produced by laser powder bed fusion and provides a methodological approach for their numerical evaluation. A combined experimental and computational framework is used, based on both actual and computationally reconstructed laser powder bed fused stents. Process-related morphological deviations between the as-designed and actual laser powder bed fused stents were observed, resulting in a diameter increase by a factor of 2-2.6 for the stents without surface treatment and 1.3-2 for the electropolished stent compared to the as-designed stent. Thus, due to the increased geometrically induced stiffness, the laser powder bed fused stents in the as-built (7.11 ± 0.63 N) or the heat treated condition (5.87 ± 0.49 N) showed increased radial forces when compressed between two plates. After electropolishing, the heat treated stents exhibited radial forces (2.38 ± 0.23 N) comparable to conventional metallic stents. The laser powder bed fused stents were further affected by the size effect, resulting in a reduced yield strength by 41% in the as-built and by 59% in the heat treated condition compared to the bulk material obtained from tensile tests. The presented numerical approach was successful in predicting the macroscopic mechanical response of the stents under compression. During deformation, increased stiffness and local stress concentration were observed within the laser powder bed fused stents. Subsequent numerical expansion analysis of the derived stent models within a previously verified numerical model of stent expansion showed that electropolished and heat treated laser powder bed fused stents can exhibit comparable expansion behavior to conventional stents. The findings from this work motivate future experimental/numerical studies to quantify threshold values of critical geometric irregularities, which could be used to establish design guidelines for laser powder bed fused stents/lattice structures.</abstract>
    <parentTitle language="eng">PLoS ONE</parentTitle>
    <identifier type="doi">10.1371/journal.pone.0244463</identifier>
    <note>Corresponding author: Lisa Wiesent</note>
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    <author>Lisa Wiesent</author>
    <author>Ulrich Schultheiß</author>
    <author>Philipp Lulla</author>
    <author>Ulf Noster</author>
    <author>Thomas Schratzenstaller</author>
    <author>Christof Schmid</author>
    <author>Aida Nonn</author>
    <author>Ashley Spear</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Heat treatment</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Lasers</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Surface treatments</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Specimen preparation and treatment</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Material properties</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Stiffness</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Deformation</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Powders</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>swd</type>
      <value>Koronarendoprothese</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>swd</type>
      <value>Rapid prototyping</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>swd</type>
      <value>Numerische Methode</value>
    </subject>
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    <collection role="persons" number="schratzenstallermd">Schratzenstaller, Thomas (Prof. Dr.) -Labor Medizinprodukte</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>
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    <collection role="institutes" number="TCParsberg">Technologie-Campus Parsberg-Lupburg</collection>
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    <collection role="institutes" number="">Computational Mechanics and Materials Lab (CMM)</collection>
    <collection role="institutes" number="">Labor Werkstoffrandschichtanalytik</collection>
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