TY - JOUR
A1 - Schepers, Winfried
A1 - Brinkgreve, RBJ
A1 - Appel, S.
T1 - Recommendations on finite element modelling of non-seismic excitation in soil-structure interaction problems
N2 - Nowadays geotechnical engineering firms have powerful software tools to extent their consult-ing business also into dynamic soil-structure interaction, which before has been restricted to a rather small community of specialized experts in this field, and they certainly do. This is par-ticularly true with respect to non-seismic sources, that is all kinds of human induced vibrations. Hence, there is a demand from clients as well as from contractors to have guidance on the re-quirements as well as the limits of numerical modelling of soil-structure interaction. From the literature as well as from relevant standards, recommendations for the numerical modelling of soil-structure interaction problems involving seismic actions are well known, e. g. ASCE/SEI 4-16. There are, however, some particularities when dealing with human-induced vibrations, which are absent in seismic analyses. For human-induced excitations very little specific guid-ance has been published in the past. A machine foundation on a homogeneous half space ex-cited by harmonic loads with excitation frequency between 4 Hz and 64 Hz has been ana-lysed by means of several commercially available software packages. Parametric studies have been performed to verify if recommendations for seismic soil-structure analyses are valid for non-seismic analyses as well. This paper provides details on the benchmark example and the most important conclusions from the undertaken parametric studies.
T2 - XII International Conference on Structural Dynamics
CY - Delft, Netherlands
DA - 02.07.2023
KW - Numerische Analysen
KW - Referenzbeispiel
KW - Maschinenfundament
KW - Wellenausbreitung
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-604931
DO - https://doi.org/10.1088/1742-6596/2647/8/082014
SN - 1742-6596
VL - 2647
IS - 25
SP - 1
EP - 13
PB - IOP Publishing
AN - OPUS4-60493
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Li, Guiping
A1 - Liu, Ye
A1 - Schultz, Thorsten
A1 - Exner, Moritz
A1 - Muydinov, Ruslan
A1 - Wang, Hui
A1 - Scheurell, Kerstin
A1 - Huang, Jieyang
A1 - Szymoniak, Paulina
A1 - Pinna, Nicola
A1 - Koch, Norbert
A1 - Adelhelm, Philipp
A1 - Bojdys, Michael J.
T1 - One‐Pot Synthesis of High‐Capacity Sulfur Cathodes via In‐Situ Polymerization of a Porous Imine‐Based Polymer
N2 - AbstractLithium‐ion batteries, essential for electronics and electric vehicles, predominantly use cathodes made from critical materials like cobalt. Sulfur‐based cathodes, offering a high theoretical capacity of 1675 mAh g−1 and environmental advantages due to sulfur's abundance and lower toxicity, present a more sustainable alternative. However, state‐of‐the‐art sulfur‐based electrodes do not reach the theoretical capacities, mainly because conventional electrode production relies on mixing of components into weakly coordinated slurries. Consequently, sulfur‘s mobility leads to battery degradation—an effect known as the “sulfur‐shuttle”. This study introduces a solution by developing a microporous, covalently‐bonded, imine‐based polymer network grown in situ around sulfur particles on the current collector. The polymer network (i) enables selective transport of electrolyte and Li‐ions through pores of defined size, and (ii) acts as a robust host to retain the active component of the electrode (sulfur species). The resulting cathode has superior rate performance from 0.1 C (1360 mAh g−1) to 3 C (807 mAh g−1). Demonstrating a high‐performance, sustainable sulfur cathode produced via a simple one‐pot process, our research underlines the potential of microporous polymers in addressing sulfur diffusion issues, paving the way for sulfur electrodes as viable alternatives to traditional metal‐based cathodes.
KW - In-situ polymerization
KW - Sulfur cathodes
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-604215
DO - https://doi.org/10.1002/anie.202400382
SN - 1433-7851
SP - 1
EP - 11
PB - Wiley VHC-Verlag
AN - OPUS4-60421
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Häßler, Dustin
A1 - Mund, Maximilian
A1 - Daus, Lars-Hendrik
A1 - Hothan, Sascha
A1 - Schaumann, Peter
A1 - Schartel, Bernhard
T1 - Durability of intumescent coatings and recommendations for test concepts for a working life of more than 10 years
N2 - It is an essential requirement for all building products to ensure durability of their fire safety. Throughout the working life of products, intumescent coatings are aged by certain climatic factors. To predict a lifetime of several years, generally the behaviour of the intumescent coating is extrapolated based on accelerated artificial ageing. The established German and European procedures to assess the durability assume a working life of at least 10 years. For a longer period, additional evidence is required; yet the procedure and the specifications to justify this are not described. In addition to addressing this formal lack, from a scientific point of view it is necessary to investigate the degradation of intumescent coatings in detail and to propose a reliable test concept to assess durability for more than 10 years. This paper summarises the existing knowledge about the ageing of intumescent coatings. The results of various demanding weathering approaches are presented for two intumescent coatings tested in a joint research project. Moreover, formulations with a reduced amount of functionally relevant components were analysed to gain insight into the associated effects. Derived from these research results and knowledge, recommendations are proposed to assess the durability of intumescent coatings for more than 10 years based on a combination of verifications.
KW - Ageing
KW - Fire protection
KW - Intumescent coating
KW - Steel construction
KW - Working life
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-603852
DO - https://doi.org/10.1016/j.firesaf.2024.104173
SN - 0379-7112
VL - 146
SP - 1
EP - 10
PB - Elsevier B.V.
AN - OPUS4-60385
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Hirsch, Philipp Daniel
A1 - Kunji Purayil, Sruthi Krishna
A1 - Lecompagnon, Julien
A1 - Hassenstein, Christian
A1 - Ziegler, Mathias
T1 - Robotergestützte 3D-Scans und Laserthermografie zur Prüfung an komplexen Bauteilen auf Risse
N2 - Die Integration von Automation und Robotik in die Prüfprozesse ermöglicht die
Untersuchung komplexer Bauteile. Diese Studie präsentiert die robotergestützte
Laserthermografie, um Risse in solchen Bauteilen zu identifizieren und analysieren. Diese Technik ermöglicht die automatisierte Rissprüfung welche im Vergleich zur Farbeindringprüfung auf viele, meist manuelle, Arbeitsschritte sowie die notwendigen Chemikalien verzichtet.
Zusätzlich wird ein automatisiertes Einscannen der Bauteile mithilfe eines
Linienscanners vorgestellt. Dieser Schritt ermöglicht eine detaillierte 3D-Rekonstruktion der Bauteilgeometrie und ermöglicht eine einfache Korrektur von Abweichungen in der Bauteilaufnahme und eröffnet Möglichkeiten zur adaptiven Bahnplanung bei Bauteilverformungen.
Die Rückprojektion der gefundenen Risse auf die Oberfläche des Bauteils kann
automatisiert erfolgen. Dieser Schritt erlaubt nicht nur die Identifikation der Risse, sondern auch eine genauere Analyse ihrer Geometrie und Lage am Bauteil.
Die Kombination von robotergestützter Laserthermografie, automatisiertem 3DScanning und Rückprojektion der Risse auf die Bauteiloberfläche eröffnet neue
Möglichkeiten in der zerstörungsfreien Prüfung von komplexen Bauteilen und erweitert damit mögliche Anwendungsfelder.
T2 - Jahrestagung der Deutschen Gesellschaft für Zerstörungsfreie Prüfung (DGZfP) 2024
CY - Osnabrück, Germany
DA - 06.05.2024
KW - ZFP4.0
KW - Automatisierung
KW - Thermografie
KW - Laser
KW - Roboter
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-604811
UR - https://www.ndt.net/?id=29520
VL - 182
SP - 1
EP - 8
PB - NDT.net
AN - OPUS4-60481
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Maulas, Kryzzyl M.
A1 - Paredes, Charla S.
A1 - Tabelin, Carlito Baltazar
A1 - Jose, Mark Anthony
A1 - Opiso, Einstine M.
A1 - Arima, Takahiko
A1 - Park, Ilhwan
A1 - Mufalo, Walubita
A1 - Ito, Mayumi
A1 - Igarashi, Toshifumi
A1 - Phengsaart, Theerayut
A1 - Villas, Edrhea
A1 - Dagondon, Sheila L.
A1 - Metillo, Ephrime B.
A1 - Uy, Mylene M.
A1 - Manua, Al James A.
A1 - Villacorte-Tabelin, Mylah
T1 - Isolation and Characterization of Indigenous Ureolytic Bacteria from Mindanao, Philippines: Prospects for Microbially Induced Carbonate Precipitation (MICP)
N2 - Microbially induced carbonate precipitation (MICP), a widespread phenomenon in nature, is gaining attention as a low-carbon alternative to ordinary Portland cement (OPC) in geotechnical engineering and the construction industry for sustainable development. In the Philippines, however, very few works have been conducted to isolate and identify indigenous, urease-producing (ureolytic) bacteria suitable for MICP. In this study, we isolated seven, ureolytic and potentially useful bacteria for MICP from marine sediments in Iligan City. DNA barcoding using 16s rDNA identified six of them as Pseudomonas stutzeri, Pseudomonas pseudoalcaligenes, Bacillus paralicheniformis, Bacillus altitudinis, Bacillus aryabhattai, and Stutzerimonas stutzeri but the seventh was not identified since it was a bacterial consortium. Bio-cementation assay experiments showed negligible precipitation in the control (without bacteria) at pH 7, 8, and 9. However, precipitates were formed in all seven bacterial isolates, especially between pH 7 and 8 (0.7–4 g). Among the six identified bacterial species, more extensive precipitation (2.3–4 g) and higher final pH were observed in S. stutzeri, and B. aryabhattai, which indicate better urease production and decomposition, higher CO2 generation, and more favorable CaCO3 formation. Characterization of the precipitates by scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS) and attenuated total reflectance Fourier transform spectroscopy (ATR-FTIR) confirmed the formation of three carbonate minerals: calcite, aragonite, and vaterite. Based on these results, all six identified indigenous, ureolytic bacterial species from Iligan City are suitable for MICP provided that the pH is controlled between 7 and 8. To the best of our knowledge, this is the first report of the urease-producing ability and potential for MICP of P. stutzeri, P. pseudoalcaligenes, S. stutzeri, and B. aryabhattai.
KW - Calcium carbonate
KW - Microbially induced carbonate precipitation (MICP)
KW - Ureolytic bacteria
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-600888
DO - https://doi.org/10.3390/min14040339
VL - 14
IS - 4
SP - 1
EP - 15
PB - MDPI
AN - OPUS4-60088
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Casperson, Ralf
A1 - Friedrich, Alexander
A1 - Heckel, Thomas
A1 - Zhang, Tianyun
T1 - Verwendung von DICONDE bei der Eisenbahn-Schienenprüfung
N2 - Bei der zerstörungsfreien Prüfung verlegter Eisenbahnschienen werden die Rohdaten derzeit in proprietären Datenformaten gespeichert und auf Datenträgern zwischen den Prüfzügen und den auswertenden Stellen versendet. Die proprietären Datenformate sind in der Regel nur den Herstellern der Prüfsysteme bekannt und deren Dokumentation nicht allgemein zugänglich.
Die „Standard Practice for Digital Imaging and Communication in Nondestructive Evaluation“ (DICONDE), basierend auf dem medizinischen Standard „Digital Imaging and Communication in Medicine“ (DICOM), ermöglicht es, sowohl Prüfdaten als auch Prüfergebnisse und Streckeninformationen in einem standardisierten Format zu speichern und zwischen verschiedenen Endpunkten zu übertragen.
Das Poster gibt zunächst einen kurzen Überblick über die hierarchische Struktur von DICONDE und zeigt dann, wie DICONDE bei der Prüfung verlegter Eisenbahnschienen verwendet werden kann. Die geometrischen Besonderheiten (mehrere Kilometer Länge pro Prüffahrt, kurviger Streckenverlauf) stellen dabei eine besondere Herausforderung dar. Im Rahmen des mFUND-geförderten Projektes „Arteficial Intelligence for Railway Inspection (AIFRI)“, Förderkennzeichen 19FS2014C, wurde ein Vorschlag für eine Erweiterung des DICONDE-Standards für die Schienenprüfung erarbeitet und bei der ASTM eingereicht.
T2 - DGZfP Jahrestagung 2024
CY - Osnabrück, Germany
DA - 05.05.2024
KW - DICONDE
KW - Eisenbahn
KW - Schienenprüfung
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-600204
DO - https://doi.org/10.58286/29500
SP - 1
EP - 5
PB - NDT.net
AN - OPUS4-60020
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Poka, Konstantin
A1 - Ali, Sozol
A1 - Saeed, Waleed
A1 - Merz, Benjamin
A1 - Epperlein, Martin
A1 - Hilgenberg, Kai
T1 - Design and implementation of a machine log for PBF-LB/M on basis of IoT communication architectures and an ETL pipeline
N2 - AbstractPowder Bed Fusion with Laser Beam of Metals (PBF-LB/M) has gained more industrial relevance and already demonstrated applications at a small series scale. However, its widespread adoption in various use cases faces challenges due to the absence of interfaces to established Manufacturing Execution Systems (MES) that support customers in the predominantly data-driven quality assurance. Current state-of-the-art PBF-LB/M machines utilize communication architectures, such as OPC Unified Architecture (OPC UA), Message Queuing Telemetry Transport (MQTT) and Representational State Transfer Application Programming Interface (REST API). In the context of the Reference Architecture Model Industry 4.0 (RAMI 4.0) and the Internet of Things (IoT), the assets, particularly the physical PBF-LB/M machines, already have an integration layer implemented to communicate data such as process states or sensor values. Missing is an MES component acting as a communication and information layer. To address this gap, the proposed Extract Transform Load (ETL) pipeline aims to extract relevant data from the fabrication of each build cycle down to the level of scan vectors and additionally to register process signals. The suggested data schema for archiving each build cycle adheres to all terms defined by ISO/TC 261—Additive Manufacturing (AM). In relation to the measurement frequency, all data are reorganized into entities, such as the AM machine, build cycle, part, layer, and scan vector. These scan vectors are stored in a runtime-independent format, including all metadata, to be valid and traceable. The resulting machine log represents a comprehensive documentation of each build cycle, enabling data-driven quality assurance at process level.
KW - FAIR data
KW - Data-driven quality assurance
KW - Laser powder bed fusion
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-601256
DO - https://doi.org/10.1007/s40964-024-00660-7
SN - 2363-9512
SP - 1
EP - 12
PB - Springer Science and Business Media LLC
AN - OPUS4-60125
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Schlögl, Johanna
A1 - Goldammer, Ole
A1 - Bader, Julia
A1 - Emmerling, Franziska
A1 - Riedel, Sebastian
T1 - Introducing AFS ([Al(SO3F)3]x) – a thermally stable, readily available, and catalytically active solid Lewis superacid
N2 - This paper introduces the thermally stable, solid Lewis superacid aluminium tris(fluorosulfate) (AFS), that is easy-to-synthesize from commercially available starting materials. Its applicability, e.g. in catalytic C–F bond activations, is shown.
KW - Lewis Acid
KW - C-F activation
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-601001
DO - https://doi.org/10.1039/D4SC01753F
SN - 2041-6520
SP - 1
EP - 7
PB - Royal Society of Chemistry (RSC)
AN - OPUS4-60100
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Schmidt, Stephan
A1 - Hoffmann, Holger
A1 - Garbe, Leif-Alexander
A1 - Harrer, Andrea
A1 - Steiner, Markus
A1 - Himly, Martin
A1 - Schneider, Rudolf
T1 - Re-assessment of monoclonal antibodies against diclofenac for their application in the analysis of environmental waters
N2 - The non-steroidal anti-inflammatory drug (NSAID) diclofenac (DCF) is an important environmental contaminant occurring in surface waters all over the world, because, after excretion, it is not adequately removed from wastewater in sewage treatment plants. To be able to monitor this pollutant, highly efficient analytical methods are needed, including immunoassays. In a medical research project, monoclonal antibodies against diclofenac and its metabolites had been produced. Based on this monoclonal anti-DCF antibody, a new indirect competitive enzyme-linked immunosorbent assay (ELISA) was developed and applied for environmental samples. The introduction of a spacer between diclofenac and the carrier protein in the coating conjugate led to higher sensitivity. With a test midpoint of 3 mg L−1 and a measurement range of 1–30 mg L−1, the system is not sensitive enough for direct analysis of surface water. However, this assay is quite robust against matrix influences and can be used for wastewater. Without adjustment of the calibration, organic solvents up to 5%, natural organic matter (NOM) up to 10 mg L−1, humic acids up to 2.5 mg L−1, and salt concentrations up to 6 g L−1 NaCl and 75 mg L−1 CaCl2 are tolerated. The antibody is also stable in a pH range from 3 to 12. Cross-reactivity (CR) of 1% or less was determined for the metabolites 40-hydroxydiclofenac (40-OH-DCF), 5-hydroxydiclofenac (5-OH-DCF), DCF lactam, and other NSAIDs. Relevant cross-reactivity occurred only with an amide derivative of DCF, 6-aminohexanoic acid (DCF-Ahx), aceclofenac (ACF) and DCF methyl ester (DCF-Me) with 150%, 61% and 44%, respectively. These substances, however, have not been found in samples. Only DCF-acyl glucuronide with a cross-reactivity of 57% is of some relevance. For the first time, photodegradation products were tested for cross-reactivity. With the ELISA based on this antibody, water samples were analysed. In sewage treatment plant effluents, concentrations in the range of 1.9–5.2 mg L−1 were determined directly, with recoveries compared to HPLC-MS/MS averaging 136%.
Concentrations in lakes ranged from 3 to 4.4 ng L−1 and were, after pre-concentration, determined with an average recovery of 100%
KW - Antikörper
KW - Immunoassay
KW - Wasser
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-602280
DO - https://doi.org/10.1039/d3ay01333b
VL - 16
IS - 21
SP - 3349
EP - 3363
PB - Royal Society of Chemistry (RSC)
CY - London
AN - OPUS4-60228
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Galleani, Gustavo
A1 - Lodi, Thiago A.
A1 - Conner, Robin L.
A1 - Jacobsohn, Luiz G.
A1 - de Camargo, Andrea Simone Stucchi
T1 - Photoluminescence and X-ray induced scintillation in Gd3+-Tb3+ co-doped fluoride-phosphate glasses, and derived glass-ceramics containing NaGdF4 nanocrystals
N2 - The glass system (50NaPO3–20BaF2–10CaF2–20GdF3)-xTbCl3 with x = 0.3, 1, 3, 5, and 10 wt % was investigated. We successfully produced transparent glass ceramic (GC) scintillators with x = 1 through a melt-quenching process followed by thermal treatment. The luminescence and crystallization characteristics of these materials were thoroughly examined using various analytical methods. The nanocrystallization of Tb3+-doped Na5Gd9F32 within the doped fluoride-phosphate glasses resulted in enhanced photoluminescence (PL) and radioluminescence (RL) of the Tb3+ ions. The GC exhibited an internal PL quantum yield of 33 % and the integrated RL intensity across the UV-visible range was 36 % of that reported for the commercial BGO powder scintillator. This research showcases that Tb-doped fluoridephosphate GCs containing nanocrystalline Na5Gd9F32 have the potential to serve as efficient scintillators while having lower melting temperature compared to traditional silicate and germanate glasses.
KW - Glass scintillator
KW - Fluoride phosphate glasses
KW - Gd3+
KW - Tb3+
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-603588
DO - https://doi.org/10.1016/j.omx.2023.100288
VL - 21
SP - 1
EP - 9
PB - Elsevier B.V.
AN - OPUS4-60358
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Tatzel, Michael
A1 - Oelze, Marcus
A1 - Frick, Daniel A.
A1 - Di Rocco, Tommaso
A1 - Liesegang, Moritz
A1 - Stuff, Maria
A1 - Wiedenbeck, Michael
T1 - Silicon and oxygen isotope fractionation in a silicified carbonate rock
N2 - Silicon isotope fractionation during silicification is poorly understood and impedes our ability to decipher paleoenvironmental conditions from Si isotopes in ancient cherts. To investigate isotope fractionation during silica-for-carbonate replacement we analyzed the microscale Si and O isotope composition in different silica phases in a silicified zebra dolostone as well as their bulk δ18O and Δ’17O compositions. The subsequent replacement of carbonate layers is mimicked by decreasing δ18O and δ30Si. The textural relationship and magnitude of Si and O isotope fractionation is best explained by near-quantitative silica precipitation in an open system with finite Si. A Rayleigh model for silicification suggests positive Ɛ30/28Si during silicification, conforming with predictions for isotope distribution at chemical equilibrium from ab-initio models. Application of the modelled Ɛ30Si-T relationship yields silicification temperatures of approx. 50°C. To reconcile the δ18Ochert composition with these temperatures, the δ18O of the fluid must have been between -2.5 and -4 ‰, compositions for which the quartz phases fall close to the oxygen equilibrium fractionation line in three-isotope space. Diagenetic silica replacement appears to occur in O and Si isotopic equilibrium allowing reconstructions of temperatures of silicification from Si isotopes and derive the δ18O composition of the fluid – a highly desired value needed for accurate reconstructions of the temperature- and δ18O histories of the oceans.
KW - Silicon isotopes
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-603430
DO - https://doi.org/10.1016/j.chemgeo.2024.122120
SN - 0009-2541
VL - 658
SP - 1
EP - 13
PB - Elsevier B.V.
AN - OPUS4-60343
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Wosniok, Aleksander
A1 - Königsbauer, Korbinian
A1 - Nöther, Nils
A1 - Färber, Jan
A1 - Schaller, M.-Barbara
A1 - Krebber, Katerina
T1 - Distributed polymer optical fiber sensors using digital I-OFDR for geotechnical infrastructure health monitoring
N2 - We present a distributed polymer optical fiber sensor system for deformation monitoring of geotechnical infrastructure. The sensor system is based on the digital incoherent optical frequency domain reflectometry (I-OFDR) for the detection of local strain events along a perfluorinated polymer optical fiber (PF-POF) used as a sensing fiber. For the best possible load transfer, the PF-POFs were integrated onto geosynthetics which pose a sensor carrier for the sensing fiber. By using elastic PF-POF instead of a standard glass fiber as a sensing fiber the strain range of geosynthetics-integrated fiber optic sensors could be extended up to 10 % in accordance with the end-user requirements.
T2 - 11th European Workshop on Structural Health Monitoring
CY - Potsdam, Germany
DA - 10.06.2024
KW - Digital I-OFDR
KW - Distributed polymer optical fiber sensor
KW - Ddistributed strain sensing
KW - Smart geosynthetics
KW - Structural health monitoring
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-603096
SP - 1
EP - 7
PB - NDT.net
AN - OPUS4-60309
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Charmi, Amir
A1 - Heimann, Jan
A1 - Duffner, Eric
A1 - Hashemi, Seyedreza
A1 - Prager, Jens
T1 - Application of deep learning for structural health monitoring of a composite overwrapped pressure vessel undergoing cyclic loading
N2 - Structural health monitoring (SHM) using ultrasonic-guided waves (UGWs) enables continuous monitoring of components with complex geometries and provides extensive information about their structural integrity and their overall condition. Composite overwrapped pressure vessels (COPVs) used for storing hydrogen gases at very high pressures are an example of a critical infrastructure that could benefit significantly from SHM. This can be used to increase the periodic inspection intervals, ensure safe operating conditions by early detection of anomalies, and ultimately estimate the remaining lifetime of COPVs. Therefore, in the digital quality infrastructure initiative (QI-Digital) in Germany, an SHM system is being developed for COPVs used in a hydrogen refueling station. In this study, the results of a lifetime fatigue test on a Type IV COPV subjected to many thousands of load cycles under different temperatures and pressures are presented to demonstrate the strengths and challenges associated with such an SHM system. During the cyclic testing up to the final material failure of the COPV, a sensor network of fifteen surface-mounted piezoelectric (PZT) wafers was used to collect the UGW data. However, the pressure variations, the aging process of the COPV, the environmental parameters, and possible damages simultaneously have an impact on the recorded signals. This issue and the lack of labeled data make signal processing and analysis even more demanding. Thus, in this study, semi-supervised, and unsupervised deep learning approaches are utilized to separate the influence of different variables on the UGW data with the final aim of detecting and localizing the damage before critical failure.
T2 - 11th European Workshop on Structural Health Monitoring
CY - Potsdam, Germany
DA - 10.06.2024
KW - Structural health monitoring
KW - Deep learning
KW - Ultrasonic-guided waves
KW - Anomaly detection
KW - Damage localization
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-607396
DO - https://doi.org/10.58286/29751
SP - 1
EP - 8
AN - OPUS4-60739
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Hupp, Vitus
A1 - Schartel, Bernhard
A1 - Flothmeier, K.
A1 - Hartwig, A.
T1 - Pyrolysis and flammability of phosphorus based flame retardant pressure sensitive adhesives and adhesive tapes
N2 - Pressure-sensitive adhesive tapes are used in a variety of applications such as construction, aircrafts, railway vehicles, and ships, where flame retardancy is essential. Especially in these applications, phosphorus-based flame retardants are often chosen over halogenated ones due to their advantages in terms of toxicity. Although there are pressure-sensitive adhesives with phosphorus flame retardants available on the market, their flame-retardant modes of action and mechanisms are not entirely understood. This research article provides fundamental pyrolysis research of three phosphorus-based flame retardants that exhibit different mechanisms in a pressuresensitive adhesive matrix. The flame-retardants modes of action and mechanisms of a 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) derivate, an aryl phosphate, and a self-synthesized, covalently bonded DOPO derivate (copolymerized) are investigated. The blended DOPO derivate is volatilized at rather low temperatures while the covalently bonded DOPO derivate decomposes together with the polymer matrix at the same temperature. Both DOPO derivates release PO radicals which are known for their flame inhibition. The aryl phosphate decomposes at higher temperatures, releases small amounts of aryl phosphates into the gas phase, and acts predominantly the condensed phase. The aryl phosphate acts as precursor for phosphoric acid and improves the charring of the pressure sensitive adhesive matrix. All flame retardants enhance the flammability of the adhesives depending on their individual mode of action while the covalently bonded flame retardant additionally improves the mechanical properties at elevated temperatures making it a promising future technology for pressure-sensitive adhesives.
KW - Pyrolysis of flame retardant
KW - Pyrolysis gas chromatography
KW - Mass spectrometry
KW - Phosphorus flame retardant
KW - Decomposition mechanism
KW - Flame retardant pressure sensitive adhesives
KW - Flame retardancy
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-607192
DO - https://doi.org/10.1016/j.jaap.2024.106658
SN - 0165-2370
SN - 1873-250X
VL - 181
SP - 1
EP - 31
PB - Elsevier B.V.
AN - OPUS4-60719
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Johann, Sergej
A1 - Stürenberg, Jan
A1 - Tandon, Aditya
T1 - Robotergestütztes Bauwerksmonitoring basierend auf eingebetteter Sensorik
N2 - In den letzten Jahrzehnten hat sich das Bauwerksmonitoring (engl. „Structural Health Monitoring“, SHM) zu einer nützlichen Ergänzung routinemäßiger Inspektionen entwickelt. SHM ermöglicht die frühzeitige Erkennung von Schäden an Bauwerken und dadurch die frühe, und somit kostengünstige, Durchführung von Reparatur- und Wartungsarbeiten. Mit dem Aufkommen drahtloser Technologien und Fortschritten in der Informations- und Kommunikationstechnologie werden Bauwerke zunehmend mit drahtlosen Sensorknoten ausgestattet, um für SHM relevante Bauwerksdaten zu erfassen, zu analysieren und zu übertragen. Eine vielversprechende Methode für SHM ist die direkte Einbettung von Sensoren in den Beton. In diesem Beitrag wird ein Sensorsystem zur Einbettung in Beton vorgestellt, das in der Lage ist, die im Beton aufgenommenen Bauwerksdaten auszuwerten. Die Sensoren werden bei Bedarf von vierbeinigen Robotern mittels Radio Frequency Identification (RFID) ausgelesen und mit Energie versorgt, was einen automatisierten und effizienten Prozess ermöglicht. Der prototypische Prozess zur automatischen Erfassung von Bauwerksdaten mit eingebetteter Sensorik und vierbeinigen Robotern wird durch Tests in einer Büroumgebung validiert. Die Ergebnisse der Tests bestätigen die automatische und effiziente Erfassung von Bauwerksdaten, die eine frühzeitige Erkennung von Bauwerksschäden, auch von nicht sichtbaren Schäden, ermöglicht, und eine folgerichtige Weiterentwicklung des
modernen Bauwerksmonitorings repräsentiert.
T2 - 35. Forum Bauinformatik
CY - Hamburg, Germany
DA - 18.09.2024
KW - Radio Frequency Identification (RFID)
KW - Bauwerksmonitoring (SHM)
KW - Eingebettete Sensorik
KW - Vierbeinige Roboter
KW - Autonome Navigation
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-621890
DO - https://doi.org/10.15480/882.13502
SP - 139
EP - 146
AN - OPUS4-62189
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Tukhmetova, Dariya
A1 - Langhammer, Nicole
A1 - Vogl, Jochen
A1 - Meermann, Björn
T1 - Online Isotope Analysis of Sulfur in Proteins via Capillary Electrophoresis Coupled With Multicollector ICP‐MS (CE/MC‐ICP‐MS): A Proof of Concept Study
N2 - Isotope ratio analysis of sulfur in biological samples using inductively coupled plasma-mass spectrometry (ICP-MS) has gained significant interest for applications in quantitative proteomics. Advancements like coupling separation techniques with multicollector ICP-MS (MC-ICP-MS) enhance the throughput of species-specific sulfur isotope ratio measurements, fostering new avenues for studying sulfur metabolism in complex biological matrices. This proof-of-concept study investigates the feasibility of online CE/MC-ICP-MS for directly analyzing sulfur isotope ratios in proteins (albumin). Leveraging our previous work on the applicability of CE/ICP-MS for quantifying sulfur-containing biological molecules, we explore its potential for sulfur isotope analysis. Our results demonstrate that direct analysis of sulfur isotopes in albumin protein using online capillary electrophoresis MC-ICP-MS (CE/MC-ICP-MS) eliminates the need for laborious pretreatment steps, while yielding isotope ratios comparable to the reference values. Although initial precision can be improved through further system optimization and protein injection techniques, this approach paves the way for future analysis of mixtures of various biological compounds in, for example, clinical diagnosis studies.
KW - Isotope analysis
KW - Sulfur
KW - CE/MC-ICP-MS
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-612439
DO - https://doi.org/10.1002/elps.202400128
SN - 0173-0835
SP - 1
EP - 6
PB - Wiley-Blackwell
CY - Weinheim
AN - OPUS4-61243
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Bayerlein, Bernd
A1 - Schilling, Markus
A1 - Curran, Maurice
A1 - Campbell, Carelyn E.
A1 - Dima, Alden A.
A1 - Birkholz, Henk
A1 - Lau, June W.
T1 - Natural Language Processing-Driven Microscopy Ontology Development
N2 - AbstractThis manuscript describes the accelerated development of an ontology for microscopy in materials science and engineering, leveraging natural language processing (NLP) techniques. Drawing from a comprehensive corpus comprising over 14 k contributions to the Microscopy and Microanalysis conference series, we employed two neural network-based algorithms for NLP. The goal was to semiautomatically create the Microscopy Ontology (MO) that encapsulates and interconnects the terminology most frequently used by the community. The MO, characterized by its interlinked entities and relationships, is designed to enhance the quality of user query results within NexusLIMS. This enhancement is facilitated through the concurrent querying of related terms and the seamless integration of logical connections.
KW - Microscopy Ontology
KW - Knowledge Representation
KW - Semantic Interoperability
KW - Natural Language Processing
KW - Ontology Development
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-616942
DO - https://doi.org/10.1007/s40192-024-00378-y
SP - 1
EP - 12
PB - Springer Science and Business Media LLC
AN - OPUS4-61694
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Li, Yue
A1 - Colnaghi, Timoteo
A1 - Gong, Yilun
A1 - Zhang, Huaide
A1 - Yu, Yuan
A1 - Wei, Ye
A1 - Gan, Bin
A1 - Song, Min
A1 - Marek, Andreas
A1 - Rampp, Markus
A1 - Zhang, Siyuan
A1 - Pei, Zongrui
A1 - Wuttig, Matthias
A1 - Ghosh, Sheuly
A1 - Körmann, Fritz
A1 - Neugebauer, Jörg
A1 - Wang, Zhangwei
A1 - Gault, Baptiste
T1 - Machine learning‐enabled tomographic imaging of chemical short‐range atomic ordering
N2 - In solids, chemical short‐range order (CSRO) refers to the self‐organization of atoms of certain species occupying specific crystal sites. CSRO is increasingly being envisaged as a lever to tailor the mechanical and functional properties of materials. Yet quantitative relationships between properties and the morphology, number density, and atomic configurations of CSRO domains remain elusive. Herein, it is showcased how machine learning‐enhanced atom probe tomography (APT) can mine the near‐atomically resolved APT data and jointly exploit the technique's high elemental sensitivity to provide a 3D quantitative analysis of CSRO in a CoCrNi medium‐entropy alloy. Multiple CSRO configurations are revealed, with their formation supported by state‐of‐the‐art Monte‐Carlo simulations. Quantitative analysis of these CSROs allows establishing relationships between processing parameters and physical properties. The unambiguous characterization of CSRO will help refine strategies for designing advanced materials by manipulating atomic‐scale architectures.
KW - Chemical short-range order (CSRO)
KW - Atom probe tomography (APT)
KW - Machine learning
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-623777
DO - https://doi.org/10.1002/adma.202407564
SN - 1521-4095
VL - 36
IS - 44
SP - 1
EP - 9
PB - Wiley-VCH
CY - Weinheim
AN - OPUS4-62377
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Pfennig, Anja
A1 - Mohring, Wencke
A1 - Wolf, Marcus
T1 - The insignificant improvement of corrosion and corrosion fatigue behavior in geothermal environment applying Boehmit coatings on high alloyed steels
N2 - The efficacy of alumina-sol based coatings in a water-free atmosphere at high temperatures suggests a potential solution for enhancing the corrosion resistance of high-alloyed steels in Carbon Capture and Storage (CCS) environments. In this study, coupons of X20Cr13, designed for use as injection pipes with 13% Chromium and 0.20% Carbon (1.4021, AISI 420), were sol-gel coated with water and ethanol-based alumina. These coated coupons were then exposed to CO2-saturated saline aquifer water, simulating conditions in the Northern German Basin, for 1000 h at ambient pressure and 60 °C. Corrosion fatigue experiments were also conducted using specimens of X5CrNiMoCuNb16-4 (1.4542, AISI 630), a suitable candidate for geothermal applications, to assess the impact of the ethanol-based coating on the number of cycles to failure at different stress amplitudes. Unfortunately, the coating exhibited early spallation, resulting in corrosion kinetics and corrosion fatigue data identical to those of uncoated specimens. Consequently, the initially promising Boehmit coating is deemed unsuitable for CCS applications and further research therefore not advisable.
KW - Alumina coating
KW - High alloyed steel
KW - Pitting
KW - Surface corrosion
KW - CO2
KW - Pipeline
KW - Corrosion
KW - CCS
KW - CO2-storage
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-623786
DO - https://doi.org/10.3390/app14041575
SN - 2076-3417
VL - 14
IS - 4
SP - 1
EP - 12
PB - MDPI
CY - Basel
AN - OPUS4-62378
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Vlach, Tomáš
A1 - Řepka, Jakub
A1 - Hájek, Jakub
A1 - Pošta, Jan
A1 - Fürst, Richard
A1 - Hájek, Petr
T1 - Shear Capacity of Hollow High-Performance Concrete Beams with Cross-Wound Carbon Fiber-Reinforced Polymer Reinforcement
N2 - This paper introduces cross-wound CFRP shear reinforcement of hollow HPC beams. The CFRP reinforcement was manufactured in the form of a square tubular mesh from carbon rovings oriented at ±45° from the longitudinal axis. The shear reinforcement was made in two variants from carbon yarns with linear densities of 1600 and 3700 tex. Tensile reinforcement made of BFRP bars was positioned directly around the hollow core and was used as a platform for manual winding of the shear reinforcement. The hollow beams were subjected to a three-point bending test with four configurations of the tensile BFRP reinforcement for better evaluation of the effect of the shear reinforcement under different conditions. The 1600 tex shear reinforcement increased the ultimate flexural strength by at least 89% compared to specimens without any shear reinforcement. The 3700 tex shear reinforcement yielded slightly better results in most cases but was not utilized to its full shear capacity as these specimens always failed in shear due to the delamination of the concrete matrix from the shear reinforcement. There was too much reinforcement in the beam cross-section.
KW - Hollow concrete beam
KW - Shear reinforcement
KW - Composite reinforcement
KW - Woven reinforcement
KW - Cross-wound reinforcement
KW - Fiber-reinforced polymer
KW - High-performance concrete
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-623868
DO - https://doi.org/10.3390/polym17010075
SN - 2073-4360
VL - 17
IS - 1
SP - 1
EP - 13
PB - MDPI
AN - OPUS4-62386
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Paul, Nathalie
A1 - Karamitsou, Venetia
A1 - Giegerich, Clemens
A1 - Sadeghi, Afshin
A1 - Lücke, Moritz
A1 - Wagenhuber, Britta
A1 - Kister, Alexander
A1 - Rehberg, Markus
T1 - Building virtual patients using simulation-based inference
N2 - In the context of in silico clinical trials, mechanistic computer models for pathophysiology and pharmacology (here Quantitative Systems Pharmacology models, QSP) can greatly support the decision making for drug candidates and elucidate the (potential) response of patients to existing and novel treatments. These models are built on disease mechanisms and then parametrized using (clinical study) data. Clinical variability among patients is represented by alternative model parameterizations, called virtual patients. Despite the complexity of disease modeling itself, using individual patient data to build these virtual patients is particularly challenging given the high-dimensional, potentially sparse and noisy clinical trial data. In this work, we investigate the applicability of simulation-based inference (SBI), an advanced probabilistic machine learning approach, for virtual patient generation from individual patient data and we develop and evaluate the concept of nearest patient fits (SBI NPF), which further enhances the fitting performance. At the example of rheumatoid arthritis where prediction of treatment response is notoriously difficult, our experiments demonstrate that the SBI approaches can capture large inter-patient variability in clinical data and can compete with standard fitting methods in the field. Moreover, since SBI learns a probability distribution over the virtual patient parametrization, it naturally provides the probability for alternative parametrizations. The learned distributions allow us to generate highly probable alternative virtual patient populations for rheumatoid arthritis, which could potentially enhance the assessment of drug candidates if used for in silico trials.
KW - Simulation-based inference
KW - Machine learning
KW - Artificial intelligence
KW - Virtual patients
KW - Pathophysiology
KW - Pharmacology
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-626050
DO - https://doi.org/10.3389/fsysb.2024.1444912
SN - 2674-0702
VL - 4
SP - 1
EP - 11
PB - Frontiers Media SA
AN - OPUS4-62605
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Weiss, Daniel
A1 - Asna Ashari, Parsa
A1 - Blind, Knut
T1 - Exploring the fuel-cell technological innovation system: Technology interactions in the mobility sector
N2 - With the rise of alternative sustainable powertrain technologies, the mobility paradigm has undergone fundamental changes in recent years. In the wake of the ongoing transition of the road-vehicle sector, fuel-cell vehicles (FCVs) have received increased political attention. However, they constitute only a tiny fraction of total road vehicles nowadays and still face competition from other powertrain technologies. Therefore, this study specifically focuses on how the focal technological innovation system of FCVs is influenced by the emerging electric vehicles (EVs) and established internal combustion engine vehicles (ICEVs) as its context structures. To this end, our time-series vector error correction models analyze the short- and long-run causalities between our focal TIS and its context structures. Using publications, patents, and standards as quantitative TIS indicators, we analyze the modes of technology interaction between FCVs and EVs and FCVs and ICEVs to determine the life-cycle phase of our focal FCV-TIS in more depth. Our results demonstrate that the FCV-TIS is in its formative phase based on the dominance of the EV and ICEV context structures. As policy implications, we derive application-sensitive technology policies that combine the benefits of each mobility technology toward the sustainable transition of the mobility sector.
KW - Technological innovation system (TIS)
KW - Technology interaction
KW - TIS-context relations
KW - Fuel-cell vehicles
KW - Electric vehicles
KW - Internal combustion engine vehicles
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-626599
DO - https://doi.org/10.1016/j.trip.2024.101107
SN - 2590-1982
VL - 25
SP - 1
EP - 15
PB - Elsevier
CY - Amsterdam
AN - OPUS4-62659
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Ladu, Luana
A1 - Morone, P.
T1 - Sustainability assessments of bio-based products: From research to practice (and standards)☆
N2 - The transition from a linear, fossil-based economy to a circular, bio-based economy is needed in order to achieve climate neutrality by 2050. However, it is important to ensure that the bio-based economy delivers the expected environmental and social impacts, by respecting and implementing sustainability principles. One effective way to reduce uncertainty regarding bio-based product properties and benefits is through the use of sustainability standards, certification schemes, and ecolabels. These measures can play a significant role in advancing the transition to a sustainable, circular bio-based economy. They provide a solid foundation for assessing sustainability of “green” products and initiatives and contribute greatly to building trust in products among consumers, providing a reliable framework for sevaluation. To measure the sustainability of bio-based products, several robust and reliable tools are under development, gathering evidence from research and collaborative efforts of several European projects.
KW - Bioeconomy
KW - Sustainability Assessment
KW - Standards
KW - Certifications
KW - Ecolabels
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-623576
DO - https://doi.org/10.1016/j.socimp.2024.100041
VL - 3
SP - 1
EP - 4
PB - Elsevier Ltd.
AN - OPUS4-62357
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Völker, Tobias
A1 - Mensing, Friedrich
A1 - Kruschwitz, Sabine
T1 - Estimation of cement content in concrete by spatially resolved laser induced breakdown spectroscopy
N2 - The cement content in concrete significantly influences critical properties such as durability, permeability, strength, and workability. Traditional methods for estimating the cement content face limitations. These include the need for comprehensive chemical and solubility knowledge, extensive sample preparation, and their time-consuming and destructive nature. This study investigates the application of laser-induced breakdown spectroscopy (LIBS) as an alternative method. It involves probing concrete samples with high spatial resolution and analyzing the resultant spectra. The methodology is first tested on mesoscale concrete models to assess limitations and inherent errors. Subsequently, the methodology is applied to actual concrete samples with varying cement content and aggregate size distributions. The results demonstrate a promising accuracy, with an average relative error of approximately 8%. This paper offers a comprehensive evaluation of the method's advantages, limitations, and factors influencing its practical applicability in field conditions.
KW - LIBS
KW - Spectroscopy
KW - Cement content
KW - Elemental mapping
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-620112
DO - https://doi.org/10.1016/j.cemconres.2024.107714
SN - 1873-3948
VL - 189
SP - 1
EP - 10
PB - Elsevier Ltd.
AN - OPUS4-62011
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Alem, Sayed Ali Ahmad
A1 - Sabzvand, Mohammad Hossein
A1 - Govahi, Parnian
A1 - Poormehrabi, Pooria
A1 - Azar, Mahdi Hasanzadeh
A1 - Siouki, Sara Salehi
A1 - Rashidi, Reza
A1 - Angizi, Shayan
A1 - Bagherifard, Sara
T1 - Advancing the next generation of high-performance metal matrix composites through metal particle reinforcement
N2 - Metal matrix composites (MMCs) offer asignificant boost to achieve a wide range of advanced mechanical properties and improved performance for a variety of demanding applications. The addition of metal particles as reinforcement in MMCs is an exciting alternative to conventional ceramic reinforcements, which suffer from numerous shortcomings. Over the last two decades, various categories of metal particles, i.e., intermetallics, bulk metallic glasses, high-entropy alloys, and shape memory alloys, have become popular as reinforcement choices for MMCs. These groups of metal particles offer a combination of outstanding physico-mechanical properties leading to unprecedented performances; moreover, they are significantly more compatible with the metal matrices compared to traditional ceramic reinforcements. In this review paper, the recent developments in MMCs are investigated. The importance of understanding the active mechanisms at the interface of the matrix and the reinforcement is highlighted. Moreover, the processing techniques required to manufacture high-performance MMCs are explored identifying the potential structural and functional applications. Finally, the potential advantages and current challenges associated with the use of each reinforcement category and the future developments are critically discussed. Based on the reported results, the use of metal particles as reinforcement in MMCs offers a promising avenue for the development of advanced materials with novel mechanical properties. Further progress requires more in-depth fundamental research to realize the active reinforcing mechanisms at the atomic level to precisely identify, understand, and tailor the properties of the integrated composite materials.
KW - Intermetallic
KW - Composite
KW - Metal matrix composite
KW - Interface
KW - High entropy alloy
KW - Bulk metallic glass
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-620730
DO - https://doi.org/10.1007/s42114-024-01057-4
SN - 2522-0128
VL - 8
IS - 1
SP - 1
EP - 68
PB - Springer Nature
AN - OPUS4-62073
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Christensen, J. B.
A1 - Jørgensen, A. A.
A1 - Vandborg, M. H.
A1 - Thomas, P. J.
A1 - Lu, Xin
A1 - Failleau, G.
A1 - Eisermann, R.
A1 - Grüner-Nielsen, L.
A1 - Balslev-Harder, D.
A1 - Lassen, M.
A1 - Krenek, S.
T1 - Fiber-artefact methodology and calibration framework for Brillouin-based fiber sensing
N2 - We propose, and demonstrate, the use of a fiber-optical measurement artefact as a metrological tool for traceable distance calibration of distributed optical fiber sensors. The constructed fiber artefact consists of a lead-in fiber coupled to a fiber loop using a 3-dB coupler and is used to calibrate both a home-build Brillouin-OTDR setup and a custom version of a commercial Brillouin-OTDR interrogator build for distributed temperature sensing. For both interrogators, we demonstrate distance calibrations with 1-meter uncertainty (k=1) in the offset length and 0.1 % (1 m/km) uncertainty (k = 1) in the distance scale factor. In addition, it is shown that the fiber artefact can be used to assess undesired distance-dependent measurement biases.
KW - Distributed temperature sensing
KW - Metrology
KW - Distributed optical fiber sensing
KW - Brillouin optical time-domain reflectrometry
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-618853
DO - https://doi.org/10.1364/OE.544659
SN - 1094-4087
VL - 32
IS - 26
SP - 45483
EP - 45493
PB - Optica Publishing Group
AN - OPUS4-61885
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Shafiey, Hassan
A1 - Gogol-Döring, Andreas
A1 - McMahon, Dino Peter
A1 - Doublet, Vincent
A1 - Disayathanoowat, Terd
A1 - Paxton, Robert J.
T1 - A new variant of slow bee paralysis virus revealed by transcriptome analysis
N2 - Using NGS data from an RNA-seq library, we reveal a novel variant of slow bee paralysis virus (SBPV) in a pooled sample of adult honey bees (Apis mellifera) collected in southwest Germany. We provide its sequence (NCBI Accession No. PP100271) and demonstrate that it is infective for adult honey bees by feeding.
KW - SBPV
KW - Apis mellifera
KW - +ss RNA virus
KW - Iflaviridae
KW - Transmission
KW - NGS
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-620900
DO - https://doi.org/10.1080/00218839.2024.2425912
SP - 1
EP - 5
PB - Taylor & Francis
AN - OPUS4-62090
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Schneider, Mike
A1 - Couzinié, Jean-Philippe
A1 - Shalabi, Amin
A1 - Ibrahimkhel, Farhad
A1 - Ferrari, Alberto
A1 - Körmann, Fritz
A1 - Laplanche, Guillaume
T1 - Effect of stacking fault energy on the thickness and density of annealing twins in recrystallized FCC medium and high-entropy alloys
N2 - This work aims to predict the microstructure of recrystallized medium and high-entropy alloys (MEAs and HEAs) with a face-centered cubic structure, in particular the density of annealing twins and their thickness. Eight MEAs and five HEAs from the Cr-Mn-Fe-Co-Ni system are considered, which have been cast, homogenized, cold-worked and recrystallized to obtain different grain sizes. This work thus provides a database that could be used for data mining to take twin boundary engineering for alloy development to the next level. Since the stacking fault energy is known to strongly affect recrystallized microstructures, the latter was determined at 293 K using the weak beam dark-field technique and compared with ab initio simulations, which additionally allowed to calculate its temperature dependence. Finally, we show that all these data can be rationalized based on theories and empirical relationships that were proposed for pure metals and binary Cu-based alloys.
KW - CoCrFeMnNi HEAs and MEAs
KW - Recrystallization
KW - Transmission electron microscopy (TEM)
KW - Electron backscatter diffraction
KW - Grain boundary engineering
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-629346
DO - https://doi.org/10.1016/j.scriptamat.2023.115844
SN - 1359-6462
VL - 240
SP - 1
EP - 6
PB - Elsevier
CY - Amsterdam
AN - OPUS4-62934
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Sridaran Venkat, Ramanan
A1 - Stamm, Michael
A1 - Wittmann, Jost
A1 - Lauterbach, Helge
A1 - Bleier, Michael
T1 - Harnessing the power of thermal imagery and visual inspection- a mean for reliable damage detection of wind turbine rotor blades
N2 - Generation of green electricity as part of the energy transition is leading to a growing market in the wind energy sector all over the world. Maintenance and inspection are key-factor for the reliable, safe and efficient operation of wind turbines. Regular maintenance of rotor blades focuses on damage such as erosion on the leading edge of the profile, delamination and thermal cracks due to lightning strikes. To date, visual inspection by technicians (climbers) has been the state of the art. Recently, drone-based inspections using visual cameras have become more common, enabling fast, reliable and cost-effective inspections. However, no internal damage to the rotor blades are detectable during such an inspection. This deficiency is often compensated by thermography, a recognized method for detecting damages beneath the surface of an object. Thermography has been promoted and continuously developed at BAM for years. In the first part of this paper, the authors present the concept for a drone-based multisensory system that combines a thermal camera, a high-resolution visual camera and a 3D Laser scanner.The system provides a comprehensive view of the rotor blade samples internal and external conditions. In the second part of the paper, we present a lab-based demonstrator comprising an infrared camera and an RGB camera. We elaborate on the process for fusing the images comprising the calibration, image preprocessing and image registration.
T2 - 11th European Workshop on Structural Health Monitoring
CY - Potsdam, Germany
DA - 10.06.2024
KW - Wind rotor blade inspection
KW - Thermography
KW - Data fusion
KW - Drone inspection
KW - Multi-sensors
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-625107
DO - https://doi.org/10.58286/29868
SN - 1435-4934
VL - 29
SP - 1
EP - 8
AN - OPUS4-62510
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Zia, Ghezal Ahmad Jan
A1 - Valdestilhas, Andre
A1 - Moreno Torres, Benjami
A1 - Kruschwitz, Sabine
T1 - Leveraging large language models for automated knowledge graphs generation in non-destructive testing
N2 - This paper presents an innovative approach for the automatic generation of Knowledge Graphs (KGs) from heterogeneous scientific articles in the domain of Non-Destructive Testing (NDT) applied to building materials.
Our methodology leverages large language models (LLMs) to extract and semantically relate concepts from diverse sources. We developed material-specific agents for concrete, wood, steel, and bricks, each equipped with a curated glossary of terms to ensure domain accuracy. These agents process PDF documents, extracting relevant information on deterioration mechanisms, physical changes, and applicable NDT methods. The extracted data is then normalized, validated, and structured into a Neo4j graph database, forming a comprehensive KG. Our results demonstrate the system’s ability to automatically discover and represent intricate relationships between materials, deterioration mechanisms, physical changes, and NDT techniques. The generated KG successfully captures complex interactions, such as the applicability of specific NDT methods to various materials under different deterioration conditions. This work not only highlights the potential of KGs in enhancing knowledge discovery and representation in NDT research but also provides a scalable framework for extending this approach to other scientific domains.
T2 - SeMatS 2024 - The 1st International Workshop on Semantic Materials Science
CY - Amsterdam, The Netherlands
DA - 17.09.2024
KW - Materials science and engineering
KW - Large language model
KW - Linked open data
KW - Data interoperability
KW - RDF
KW - Semantic web
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-624597
DO - https://doi.org/10.5281/zenodo.13834164
SN - 1613-0073
N1 - Serientitel: CEUR workshop proceedings – Series title: CEUR workshop proceedings
VL - 3760
SP - 101
EP - 110
PB - RWTH Aachen
CY - Aachen
AN - OPUS4-62459
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Strobl, Dominic
A1 - Unger, Jörg F.
A1 - Ghnatios, C.
A1 - Robens-Radermacher, Annika
T1 - PGD in thermal transient problems with a moving heat source: A sensitivity study on factors affecting accuracy and efficiency
N2 - Thermal transient problems, essential for modeling applications like welding and additive metal manufacturing, are characterized by a dynamic evolution of temperature. Accurately simulating these phenomena is often computationally expensive, thus limiting their applications, for example for model parameter estimation or online process control. Model order reduction, a solution to preserve the accuracy while reducing the computation time, is explored. This article addresses challenges in developing reduced order models using the proper generalized decomposition (PGD) for transient thermal problems with a specific treatment of the moving heat source within the reduced model. Factors affecting accuracy, convergence, and computational cost, such as discretization methods (finite element and finite difference), a dimensionless formulation, the size of the heat source, and the inclusion of material parameters as additional PGD variables are examined across progressively complex examples. The results demonstrate the influence of these factors on the PGD model’s performance and emphasize the importance of their consideration when implementing such models. For thermal example, it is demonstrated that a PGD model with a finite difference discretization in time, a dimensionless representation, a mapping for a moving heat source, and a spatial domain non-separation yields the best approximation to the full order model.
KW - Additive manufacturing
KW - Mapping for unseparable load
KW - Model order reduction (MOR)
KW - Thermal transient problem
KW - Sensitivity analysis
KW - Proper generalized decomposition (PGD)
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-598001
DO - https://doi.org/10.1002/eng2.12887
VL - 6
IS - 11
SP - 1
EP - 22
PB - John Wiley & Sons Ltd.
CY - Berlin
AN - OPUS4-59800
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Agrawal, A.
A1 - Tamsen, E.
A1 - Unger, Jörg F.
A1 - Koutsourelakis, P-S
T1 - From concrete mixture to structural design—a holistic optimization procedure in the presence of uncertainties
N2 - We propose a systematic design approach for the precast concrete industry to promote sustainable construction practices. By employing a holistic optimization procedure, we combine the concrete mixture design and structural simulations in a joint, forward workflow that we ultimately seek to invert. In this manner, new mixtures beyond standard ranges can be considered. Any design effort should account for the presence of uncertainties which can be aleatoric or epistemic as when data are used to calibrate physical models or identify models that fill missing links in the workflow. Inverting the causal relations established poses several challenges especially when these involve physicsbased models which more often than not, do not provide derivatives/sensitivities or when design constraints are present. To this end, we advocate Variational Optimization, with proposed extensions and appropriately chosen heuristics to overcome the aforementioned challenges. The proposed approach to treat the design process as a workflow, learn the missing links from data/models, and finally perform global optimization using the workflow is transferable to several other materials, structural, and mechanical problems. In the present work, the efficacy of the method is exemplarily illustrated using the design of a precast concrete beam with the objective to minimize the global warming potential while satisfying a number of constraints associated with its load-bearing capacity after 28 days according to the Eurocode, the demolding time as computed by a complex nonlinear finite element model, and the maximum temperature during the hydration.
KW - Black-box optimization under uncertainty
KW - Mix design
KW - Performance oriented design
KW - Precast concrete
KW - Probabilistic machine learning
KW - Sustainable material design
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-615443
DO - https://doi.org/10.1017/dce.2024.18
VL - 5
IS - e20
SP - 1
EP - 32
PB - Cambridge University Press
CY - England
AN - OPUS4-61544
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Strangfeld, Christoph
A1 - Schönsee, Eric
A1 - Jeyifous, Olubunmi Anthony
A1 - Izanlu, Morteza
A1 - Hüsken, Götz
ED - Rogge, Andreas
ED - Meng, Birgit
T1 - In situ Prozessüberwachung und Qualitätskontrolle bei der additiven Fertigung von Betonbauteilen
N2 - In der additiven Fertigung von Beton wird kontinuierlich Material gemischt und verarbeitet. Dies erfordert eine kontinuierliche in situ Prozessüberwachung und Qualitätskontrolle. An der BAM wurde ein 3D-Betondrucker aufgebaut, der eine umfängliche Prozessüberwachung ermöglicht. Druck-, Temperatur- und Feuchtesensoren in der Pumpe und im Fördersystem erlauben ein kontinuierliches Monitoring des Frischbetons, während ein Laserlinienscanner am Druckkopf unmittelbar die gedruckte Ist-Kontur verfolgt. Die so gewonnenen Daten können Grundlage für die Erarbeitung von Normen für die additive Fertigung von Betonbauteilen sein und somit deren Standsicherheit gewährleisten.
T2 - 11. Jahrestagung des DAfStb mit 63. Forschungskolloquium der BAM Green Intelligent Building
CY - Berlin, Germany
DA - 16.10.2024
KW - In situ
KW - Prozessüberwachung
KW - Additive Fertigung
KW - Betonbauteil
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-613064
SN - 978-3-9818564-7-7
SP - 138
EP - 146
PB - Bundesanstalt für Materialforschung und -prüfung (BAM)
CY - Berlin
AN - OPUS4-61306
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Rübner, Katrin
ED - Rogge, Andreas
ED - Meng, Birgit
T1 - Vom Bauschutt zur leichten Gesteinskörnung
N2 - Leichte Gesteinskörnungen können ressourcenschonend aus heterogenen und feinkörnigen Bau- und Abbruchabfällen in einem mehrstufigen Prozess durch thermische oder hydrothermale Stoffumwandlung hergestellt werden. Ihre Anwendung erfolgt in Leichtbetonen und Leichtmörteln, als Schüttung im Garten und Landschaftsbau oder auch als Filter- und Speichermaterial. In zahlreichen Forschungsprojekten wurden die Herstellungsprozesse entwickelt, die Materialeigenschaften optimiert und unterschiedliche Applikationen untersucht. In diesem Beitrag wird zusammenfassend über dieser Forschungsarbeiten berichtet.
T2 - 11. Jahrestagung des DAfStb mit 63. Forschungskolloquium der BAM Green Intelligent Building
CY - Berlin, Germany
DA - 16.10.2024
KW - Bauschutt
KW - Gesteinskörnung
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-613105
SN - 978-3-9818564-7-7
SP - 70
EP - 77
PB - Bundesanstalt für Materialforschung und -prüfung (BAM)
CY - Berlin
AN - OPUS4-61310
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Cook, Jake
A1 - Tonon, Chiara
A1 - Stohl, Leonie
A1 - von Werder, Julia
ED - Rogge, Andreas
ED - Meng, Birgit
T1 - Assessment of concrete bioreceptivity and model organism performance for use in algal biofilm green facade systems
N2 - Elevated temperatures and high levels of air pollution in urban environments pose a significant threat to the health and life quality of inhabitants of these areas. This research aims to address these challenges by developing green façade systems using micro-algal biofilms. Both material and biological properties are assessed to optimise biofilm performance and durability. Cementitious samples with different pH levels and varying nutrient compositions are tested in combination with model microorganisms. Organism growth, health and adhesion are monitored over a 3-month period under controlled laboratory conditions.
T2 - 11. Jahrestagung des DAfStb mit 63. Forschungskolloquium der BAM Green Intelligent Building
CY - Berlin, Germany
DA - 16.10.2024
KW - Concrete bioreceptivity
KW - Model organism performance
KW - Algal biofilm
KW - Algal biofilm green facade systems
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-613114
SN - 978-3-9818564-7-7
SP - 159
EP - 166
PB - Bundesanstalt für Materialforschung und -prüfung (BAM)
CY - Berlin
AN - OPUS4-61311
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Robens-Radermacher, Annika
A1 - Saif-Ur-Rehman,
A1 - Wolf, Christoph
A1 - Kujath, Cezary
A1 - He, Yuxiang
A1 - Mezhof, Alexander
A1 - Hüsken, Götz
A1 - Jeyifous, Olubunmi Anthony
A1 - Unger, Jörg F.
ED - Rogge, Andreas
ED - Meng, Birgit
T1 - Modellierung und Simulation von 3D Betondruck – Design- und Prozessoptimierung
N2 - Der 3D Betondruck ermöglicht die effiziente und ressourcenschonendere Herstellung maßgeschneiderter Betonstrukturen. Trotz des großen Potentials gibt es bisher keine einheitlichen Normen und Standards für den sicheren und robusten 3D Betondruck. Der Beitrag zeigt das Potential numerischer Methoden und Modelle zur effizienten und ressourcenschonenden Design- und Prozessoptimierung des 3D Betondrucks. Dazu werden die aktuellen Forschungsarbeiten im Bereich der Entwicklung robuster und zuverlässiger numerischer Zwillinge, geeigneter Optimierungstools sowie digitaler Workflows diskutiert.
T2 - 11. Jahrestagung des DAfStb mit 63. Forschungskolloquium der BAM Green Intelligent Building
CY - Berlin, Germany
DA - 16.10.2024
KW - Modellierung
KW - Simulation
KW - 3D Betondruck
KW - Designoptimierung
KW - Prozessoptimierung
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-613023
SN - 978-3-9818564-7-7
SP - 132
EP - 137
PB - Bundesanstalt für Materialforschung und -prüfung (BAM)
CY - Berlin
AN - OPUS4-61302
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Andrés Arcones, Daniel
A1 - Unger, Jörg F.
ED - Rogge, Andreas
ED - Meng, Birgit
T1 - Modell- und Parameterunsicherheiten am Beispiel eines digitalen Brückenzwillings
N2 - Digitale Zwillinge bieten wertvolle Einblicke in das Verhalten von Bauwerken und ermöglichen eine fundierte Entscheidungsfindung. Durch den Einsatz von Simulationen, die auf physikalischen Gesetzen beruhen, ist es möglich, Vorhersagen über die Struktur auf der Grundlage zukünftiger oder hypothetischer Situationen zu treffen. Die Verwendung solcher Simulationen impliziert jedoch eine Reihe von Annahmen und Vereinfachungen, die unvermeidbare Fehler in die Vorhersagen einbringen. Die Quantifizierung dieser Unsicherheiten ist der Schlüssel für den Einsatz zuverlässiger digitaler Zwillinge von Brücken.
T2 - 11. Jahrestagung des DAfStb mit 63. Forschungskolloquium der BAM Green Intelligent Building
CY - Berlin, Germany
DA - 16.10.2024
KW - Modellunsicherheit
KW - Parameterunsicherheit
KW - Digitaler Brückenzwilling
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-613013
SN - 978-3-9818564-7-7
SP - 218
EP - 223
PB - Bundesanstalt für Materialforschung und -prüfung (BAM)
CY - Berlin
AN - OPUS4-61301
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Hüsken, Götz
A1 - Jeyifous, Olubunmi Anthony
A1 - Schönsee, Eric
A1 - Strangfeld, Christoph
ED - Rogge, Andreas
ED - Meng, Birgit
T1 - Beitrag zur Beurteilung der Wiederholbarkeit additiv gedruckter Betonbauteile
N2 - Die additive Fertigung von Betonbauteilen, auch bekannt als 3D-Betondruck, ist eine Technologie, die im letzten Jahrzehnt aufgrund ihrer finanziellen und ökologischen Vorteile als nachhaltige Fertigungstechnologie viel Aufmerksamkeit erhalten hat. Obwohl die Vorteile der additiven Fertigung bereits durch zahlreiche Forschungs- und Demonstrationsprojekte gezeigt wurden, ist die Qualitätskontrolle während des Druckens äußerst anspruchsvoll und wird auch aufgrund fehlender harmonisierter Normen kaum angewendet. Aufgrund des kontinuierlichen Mischprozesses beim 3D-Betondruck ist es unmöglich Schwankungen des Trockenmörtels oder des Wassergehalts auszuschließen. Daher ist eine einzelne Stichprobe nicht mehr repräsentativ für das gesamte Bauteil und ein während des Druckens in einer Schicht auftretender Fehler kann die Integrität der gesamten Struktur beeinträchtigen. In diesem Beitrag werden die Ergebnisse eines als Fachwerkstruktur konzipierten Bogens, der unter vergleichbaren Randbedingungen mehrmals mit einem 3D-Betonextrusionsdrucker gedruckt wurde, vorgestellt. Jeder Bogen wurde auf seine mechanische Festigkeit und sein Tragverhalten geprüft. Die Ergebnisse der mechanischen Prüfungen der gedruckten Bögen werden mit Materialdaten aus klassischen Materialprüfungen verglichen und hinsichtlich ihrer statistischen Signifikanz diskutiert.
T2 - 11. Jahrestagung des DAfStb mit 63. Forschungskolloquium der BAM Green Intelligent Building
CY - Berlin, Germany
DA - 16.10.2024
KW - Additiv gedrucktes Betonbauteil
KW - Beurteilung
KW - Wiederholbarkeit
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-613043
SN - 978-3-9818564-7-7
SP - 126
EP - 131
PB - Bundesanstalt für Materialforschung und -prüfung (BAM)
CY - Berlin
AN - OPUS4-61304
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Pirskawetz, Stephan
A1 - Trattnig, H.
A1 - Boehm, C.
ED - Rogge, Andreas
ED - Meng, Birgit
T1 - Spanndrahtbrüche und ihr digitaler akustischer Zwilling
N2 - Die Planung eines Monitorings von Spanndrahtbrüchen mit Schallemissionsanalyse erfordert viel Erfahrung und setzt eine akustische Analyse der Spannbetonstruktur voraus. Eine akustische Simulation der Struktur unterstützt die Optimierung der Sensoranordnung und erhöht die Zuverlässigkeit der Drahtbrucherkennung durch die Fusion von Simulations- und Messergebnissen in einer Datenbank. Künftig können Baulastträger und Monitoringanbieter von standardisierten – FAIR-en – akustischen Daten profitieren.
T2 - 11. Jahrestagung des DAfStb mit 63. Forschungskolloquium der BAM Green Intelligent Building
CY - Berlin, Germany
DA - 16.10.2024
KW - Spanndrahtbruch
KW - Digitaler akustischer Zwilling
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-613038
SN - 978-3-9818564-7-7
SP - 224
EP - 229
PB - Bundesanstalt für Materialforschung und -prüfung (BAM)
CY - Berlin
AN - OPUS4-61303
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Stohl, Leonie
A1 - Cook, Jake
A1 - von Werder, Julia
ED - Rogge, Andreas
ED - Meng, Birgit
T1 - Bioreceptive concrete surfaces: Understanding material-biology interactions for façade greening
N2 - The climate crisis has led to a growing demand for environmentally oriented approaches in the construction industry, including not only eco-friendly materials, but also the greening of urban spaces. Microbial facade greening with algae is a novel concept based on the inherent bioreceptive properties of different building materials. This study focuses on the influence of physical material properties on biofilm formation. Differently textured samples from the same UHPC mix were produced and their roughness and water absorption documented. The samples were then weathered under laboratory conditions to observe material-algae interactions.
T2 - 11. Jahrestagung des DAfStb mit 63. Forschungskolloquium der BAM Green Intelligent Building
CY - Berlin, Germany
DA - 16.10.2024
KW - Bioreceptive
KW - Material-biology Interaction
KW - Façade greening
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-613096
SN - 978-3-9818564-7-7
SP - 153
EP - 158
PB - Bundesanstalt für Materialforschung und -prüfung (BAM)
CY - Berlin
AN - OPUS4-61309
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Weise, Frank
A1 - Kühnel, Alena
A1 - Fladt, Matthias
A1 - Stelzner, Ludwig
ED - Rogge, Andreas
ED - Meng, Birgit
T1 - Dauerhaftigkeit von Betonfahrbahndecken im deutschen Bundesautobahnnetz
N2 - Die Dauerhaftigkeit der Betondecke und deren Oberflächentexturierung bestimmen maßgebend das Ge-brauchsverhalten von Betonfahrbahnen. Der Beitrag zeigt die Leistungsfähigkeit der Innenhydrophobierung als neuartige AKR-Vermeidungsstrategie zur Sicherstellung der geplanten, normativen Nutzungsdauer, auch unter Verwendung grenzwertig alkaliempfindlicher Gesteinskörnungen, auf. Zusätzlich wird eine neuartige Prüfmethodik zur in situ Verfolgung der 3D-Texturveränderungen auf einem erneuerten BAB-Abschnitt mit Grindingtextur vorgestellt. Diese beeinflussen maßgebend die Griffigkeit und die Reifen-Fahrbahn-Geräusche.
T2 - 11. Jahrestagung des DAfStb mit 63. Forschungskolloquium der BAM Green Intelligent Building
CY - Berlin, Germany
DA - 16.10.2024
KW - Betonfahrbahnen
KW - Alkali-Kieselsäure-Reaktion
KW - Innenhydrophobierung
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-613184
SN - 978-3-9818564-7-7
SP - 232
EP - 243
PB - Bundesanstalt für Materialforschung und -prüfung (BAM)
CY - Berlin
AN - OPUS4-61318
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Recknagel, Christoph
A1 - Weigel, Sandra
A1 - Hoppe, Johannes
ED - Rogge, Andreas
ED - Meng, Birgit
T1 - Dauerhafte Funktionsfähigkeit von Bauwerksfugen - Das performance concept in der Abdichtungstechnik von Betonfahrbahnen
N2 - Verlässliche Funktionsfähigkeit und planbare Lebensdauerzyklen sind entscheidend für die Weiterentwicklung der Betonbauweise im Straßenbau. Aus Forschungsergebnissen zur Fugenproblematik in hochbeanspruchten Betonfahrbahnen unter Diskussion regelungsspezifischer Erfordernisse erfolgt ein Plädoyer für eine funktionsanalytische Untersuchung von Fugensystemen. Mit aktuellen Projekten werden die Datengrundlage zu maßgebenden Einwirkungen und eine innovative versuchstechnische Infrastruktur als methodische Voraussetzungen zur Erhöhung zuverlässiger Funktionsfähigkeit von Bauwerksfugen bereitgestellt.
T2 - 11. Jahrestagung des DAfStb mit 63. Forschungskolloquium der BAM Green Intelligent Building
CY - Berlin, Germany
DA - 16.10.2024
KW - Betonfahrbahnen
KW - Bauwerksfugen
KW - Abdichtungstechnik von Betonfahrbahnen
KW - SensoJointField
KW - INFUKON
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-613207
SN - 978-3-9818564-7-7
SP - 244
EP - 252
PB - Bundesanstalt für Materialforschung und -prüfung (BAM)
CY - Berlin
AN - OPUS4-61320
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Weigel, Sandra
A1 - Recknagel, Christoph
ED - Rogge, Andreas
ED - Meng, Birgit
T1 - Ein Ausblick: Alternative Bindemittel für bitumenhaltige Materialien
N2 - Im Straßen- und Ingenieurbau sind neben dem Baustoff Beton auch bitumenhaltige Materialien in Flächenab-dichtungen, Dehnfugenkonstruktionen und Asphaltbelägen von entscheidender Bedeutung. Die bestehende Erdölabhängigkeit dieser Materialien fordert jedoch ein dringendes Umdenken, wobei langfristig die Substitu-tion des Bitumens durch nachhaltige, biobasierte Alternativmaterialien angestrebt werden sollte. Durch eine partielle Substitution wäre zudem bereits kurz- bis mittelfristig eine Reduzierung der Erdölabhängigkeit mög-lich, wobei sich z.B. Rückstände der Mikroalgenaufbereitung oder Lignin als Substitutionsprodukte eignen.
T2 - 11. Jahrestagung des DAfStb mit 63. Forschungskolloquium der BAM Green Intelligent Building
CY - Berlin, Germany
DA - 16.10.2024
KW - Alternative
KW - Bindemittel
KW - Bitumenhaltige Materialien
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-613138
SN - 978-3-9818564-7-7
SP - 167
EP - 174
PB - Bundesanstalt für Materialforschung und -prüfung (BAM)
CY - Berlin
AN - OPUS4-61313
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Pittrich, Tim
A1 - Stelzner, Ludwig
A1 - Weise, Frank
ED - Rogge, Andreas
ED - Meng, Birgit
T1 - Tunnelbrand – Abplatzverhalten von normalfesten Betonen mit verschiedenen klinkereffizienten Zementen
N2 - Zur Verminderung der CO2-Emissionen der Bauindustrie gewinnen klinkereffiziente Zemente immer mehr an Bedeutung und werden vermehrt in Ingenieurbauwerken eingesetzt. Das brandinduzierte Abplatzverhalten von Betonen mit diesen Zementen ist allerdings nur bedingt bekannt und ist u.a. im Tunnelbau von hoher Bedeutung. Im Zuge dessen, wurden normalfeste Betone mit vier verschiedenen Zementen (CEM I, CEM II/A-LL, CEM III/A und CEM II/B-Q) auf ihr brandinduziertes Abplatzverhalten untersucht. Die Ergebnisse zeigen, dass Betone mit klinkereffizienten Zementen zu stärkeren Abplatzungen neigen.
T2 - 11. Jahrestagung des DAfStb mit 63. Forschungskolloquium der BAM Green Intelligent Building
CY - Berlin, Germany
DA - 16.10.2024
KW - Verminderung CO2-Emissionen
KW - Brandinduziertes Abplatzverhalten
KW - Klinkereffiziente Zemente
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-613215
SN - 978-3-9818564-7-7
SP - 253
EP - 262
PB - Bundesanstalt für Materialforschung und -prüfung (BAM)
CY - Berlin
AN - OPUS4-61321
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Bednarska, Dalia
A1 - von Werder, Julia
ED - Rogge, Andreas
ED - Meng, Birgit
T1 - Modification of clay-based materials with a novel geopolymer: potential application towards water-resistance
N2 - Earth is probably the most eco-friendly building material. However, since earthen materials dissolve in water easily their application is limited. The presented manuscript aims to verify the usefulness of a one-part geo- polymer developed at BAM as a stabilizing agent for earthen mortars. The experimental study encompasses water-resistance, compressive strength, linear shrinkage, water vapour permeability and microstructural anal- ysis of the reference and the modified earthen plaster. The presented results show that the modification visibly affects the properties of the initial material providing its water-resistance.
T2 - 11. Jahrestagung des DAfStb mit 63. Forschungskolloquium der BAM Green Intelligent Building
CY - Berlin, Germany
DA - 16.10.2024
KW - Clay-based materials
KW - Water-resistance
KW - Novel geopolymer
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-613150
SN - 978-3-9818564-7-7
SP - 94
EP - 101
PB - Bundesanstalt für Materialforschung und -prüfung (BAM)
CY - Berlin
AN - OPUS4-61315
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Hille, Falk
A1 - Herrmann, Ralf
A1 - Schneider, Ronald
A1 - Pitters, S.
A1 - Wedel, F.
A1 - Hindersmann, I.
T1 - Developing a guideline for structural health monitoring of road bridges in Germany
N2 - In recent years, Structural Health Monitoring (SHM) has become a useful and increasingly widely used tool for supporting lifetime extensions of existing bridges with known structural deficiencies or indications of potentially critical damages or damage processes.
At the same time, methods and tools are emerging, which enable monitoring-informed predictive maintenance of new and existing bridges based on digital twins. The monitoring process – starting from the definition of monitoring actions and ending with decisions based on monitoring outcomes – is complex and requires expertise in structural engineering, operation and maintenance of bridges, metrology, and data analytics. To support German road authorities, engineering consultancies, building contractors and other stakeholders of the bridge management, the Federal Highway Research Institute (BASt) has initiated the development of a new guideline for applying SHM as part of the management of road bridges. The guideline will present various use cases and for each identified use case, it will propose a proven monitoring scheme. In addition, the guideline will provide guidance on assessing the benefits of SHM as well as a common approach to managing monitoring data as a systematic basis for integrating monitoring data in the bridge management. This contribution discusses the motivation, objectives, and scope of the guideline, describes its use case centric structure and outlines the proposed data management.
T2 - IABMAS 2024
CY - Kopenhagen, Danmark
DA - 24.06.2024
KW - Guideline
KW - Structural health monitoring
KW - Road bridges
KW - Infrastructure
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-613947
SN - 978-1-032-77040-6
DO - https://doi.org/10.1201/9781003483755-236
SP - 2009
EP - 2017
PB - CRC Press
AN - OPUS4-61394
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Neugum, Tim
A1 - Stelzner, Ludwig
A1 - Häßler, Dustin
A1 - Hothan, Sascha
A1 - Zehfuß, J.
ED - Rogge, Andreas
ED - Meng, Birgit
T1 - Feuerwiderstand gezwängter Stahlbetonstützen
N2 - Bei realen Brandereignissen stellen sich in der Regel mechanische und thermische Randbedingungen ein, die deutlich von denen in präskriptiven, bauteilorientierten Brandprüfungen abweichen. Beispielsweise werden Interaktionen der brandbeanspruchten Bauteile mit dem umgebenden Tragwerk und daraus resultierende Zwangsbeanspruchungen bei konventionellen Brandprüfungen nicht berücksichtigt. Mit Hilfe der Substrukturtechnik kann das Verhalten einer Stütze im Brandfall unter Berücksichtigung der Interaktion mit dem umgebenden Tragwerk untersucht werden.
T2 - 11. Jahrestagung des DAfStb mit 63. Forschungskolloquium der BAM Green Intelligent Building
CY - Berlin, Germany
DA - 16.10.2024
KW - Brandprüfungen
KW - Substrukturtechnik
KW - Zwangsbeanspruchungen
KW - Brandbeanspruchung
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-613249
SN - 978-3-9818564-7-7
SP - 270
EP - 277
PB - Bundesanstalt für Materialforschung und -prüfung (BAM)
CY - Berlin
AN - OPUS4-61324
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Thiele, Marc
A1 - Herrmann, Ralf
A1 - Degener, Sebastian
A1 - Pirskawetz, Stephan
A1 - Loewe, Anna
ED - Rogge, Andreas
ED - Meng, Birgit
T1 - Monitoring an Türmen von Onshore Windenergieanlagen in Betonbauweise im Hinblick auf Ermüdung
N2 - Der Beitrag stellt das Messkonzept sowie dessen Umsetzung für ein umfassendes Monitoringsystem an einer onshore Windenergieanlage mit einem Hybridturm vor. Dieses ist Bestandteil des Forschungsvorhabens Win-ConFat – Structure, welches neben der Validierung geeigneter Sensorik auch die Bewertung des Zustands und der möglichen Restlebensdauer der ermüdungsbeanspruchten Betonstruktur zum Ziel hat. Neben dem Monitoringsystem werden erste Messergebnisse aus den Betriebsdaten sowie vom Verhalten der Turmstruktur vorgestellt.
T2 - 11. Jahrestagung des DAfStb mit 63. Forschungskolloquium der BAM Green Intelligent Building
CY - Berlin, Germany
DA - 16.10.2024
KW - Monitoring
KW - Windenergieanlage und Hybridturm
KW - Ermüdung
KW - WinConFat – Structure
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-613276
SN - 978-3-9818564-7-7
SP - 286
EP - 293
PB - Bundesanstalt für Materialforschung und -prüfung (BAM)
CY - Berlin
AN - OPUS4-61327
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Hering, Marcus
A1 - Fiedler, Georg
A1 - Schubert, T.
A1 - Hille, Falk
A1 - Hüsken, Götz
A1 - Beckmann, B.
ED - Rogge, Andreas
ED - Meng, Birgit
T1 - Großmaßstäbliche Impaktversuche mit Stahlbetonplatten – Konzeptionierung und Vorbereitung
N2 - Seit 1977 ist der Flugzeugabsturz ein wesentliches Belastungsszenario bei der Auslegung von Kernkraftwerken. Zur Untersuchung dieses Szenarios wurden umfassende Studien durchgeführt, welche die Reaktion von Stahlbetonkonstruktionen unter Stoßbelastung analysieren. Da großmaßstäbliche Experimente teuer und aufwendig sind, gewinnen skalierte Versuche zunehmend an Bedeutung. Im Rahmen eines Forschungsprojekts der TU Dresden und der BAM wurden Grundlagen für skalierte Impaktversuche im großen Maßstab geschaffen, um die Übertragbarkeit vom Labor- auf Realmaßstab zu ermöglichen.
T2 - 11. Jahrestagung des DAfStb mit 63. Forschungskolloquium der BAM Green Intelligent Building
CY - Berlin, Germany
DA - 16.10.2024
KW - Fallturm
KW - Impakt
KW - Stahlbetonbauteile
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-613257
SN - 978-3-9818564-7-7
SP - 278
EP - 285
PB - Bundesanstalt für Materialforschung und -prüfung (BAM)
CY - Berlin
AN - OPUS4-61325
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Deresse, N. E.
A1 - Thiele, Marc
A1 - Pirskawetz, Stephan
A1 - Sarem, M.
A1 - Francois, St.
A1 - Verstrynge, E.
T1 - Evaluation of Concrete Fatigue Damage with Elastic Wave-based Measurement Techniques
N2 - The fatigue damage evolution and the fatigue life of quasi-brittle materials such as concrete are not yet completely understood. Accordingly to get better insights, researchers have recently been incorporating advanced measuring techniques in their fatigue experiments. In this research, acoustic emission techniques (AET), active ultrasonic, and deformation measurements are used to track the damage evolution of concrete samples subjected to fatigue loading. The samples are subjected to constant amplitude and stepwise fatigue loading in Brazilian splitting test set-ups. Initially, a good agreement is observed between the deformation and the ultrasonic measurements in capturing the crack propagation during Brazilian splitting tests. The three fatigue damage phases could be identified with all of the three techniques. The Phase II damage rates quantified by deformation measurements and AET in stepwise fatigue tests were used to predict the number of cycles to failure at various stress
levels. The predictions were validated using the number of cycles to failure of the constant amplitude fatigue tests.
T2 - 36th Conference of the European Working Group on Acoustic Emission
CY - Potsdam, Germany
DA - 18.09.2024
KW - Concrete
KW - Acoustic emission
KW - Ultrasonic testing
KW - Fatigue
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-615677
DO - https://doi.org/10.58286/30228
SN - 1435-4934
VL - 29
IS - 10
SP - 1
EP - 10
PB - NDT.net
AN - OPUS4-61567
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -