--- _id: '61825' abstract: - lang: eng text: "Abstract\r\n Industrial x-ray computed tomography (CT) systems with high geometric flexibility are increasingly utilized for large-scale measurement objects or challenging measurement tasks. To maintain high accuracy when deviating from the established circular scan trajectory, trajectory calibration methods using multi-sphere reference objects with known marker positions are commonly employed. These multi-sphere objects can either be scanned together with the measurement object (online trajectory calibration) or in a separate scan (offline trajectory calibration). While offline calibration increases machine time, it generally results in higher scan quality. However, a sufficient pose repeatability is necessary to ensure comparable or even superior accuracy to online calibration. In this contribution, we present a straightforward procedure to compare both types of trajectory calibration in a way that the differences of the results can directly be traced back to the influence of the pose repeatability. The multi-sphere reference object is not only used for trajectory calibration, but simultaneously as a measurement object for repeated measurements. The methodology is tested on both a twin robotic CT system and a conventional CT system that is additionally equipped with a hexapod manipulator for adaptive object tilting. Results showed, independent from the type of trajectory calibration, systematic measurement errors in the order of 10−5–10−4 of measured sphere distances and sphericity values below 50 \r\n \ \r\n \r\n \r\n \r\n \ μ\r\n \r\n \ \r\n m\r\n \r\n \ \r\n \r\n . For sphere distances, random errors were increased by a factor of 5 due to the offline trajectory calibration, but were still low (\r\n \ \r\n \r\n \r\n \r\n \ <\r\n \r\n \ \r\n 1\r\n \ \r\n \r\n \r\n μ\r\n \ \r\n \r\n \ m\r\n \r\n \ \r\n \r\n ) in comparison to systematic errors and the spread of different measurement features. Overall, both investigated systems demonstrated sufficient positioning repeatability for offline trajectory calibration. The method is in general also applicable to any other types of manipulator systems used for CT devices. It provides a workflow for the decision which type of trajectory calibration is preferable for a given CT system." article_number: '025401' author: - first_name: Lorenz full_name: Butzhammer, Lorenz last_name: Butzhammer - first_name: Niklas full_name: Handke, Niklas last_name: Handke - first_name: Simon full_name: Wittl, Simon last_name: Wittl - first_name: Gabriel full_name: Herl, Gabriel last_name: Herl - first_name: Tino full_name: Hausotte, Tino last_name: Hausotte citation: ama: Butzhammer L, Handke N, Wittl S, Herl G, Hausotte T. Direct assessment of the influence of pose repeatability on the accuracy of dimensional measurements for computed tomography systems with high degrees of freedom. Measurement Science and Technology. 2025;36(2). doi:10.1088/1361-6501/ada05a apa: Butzhammer, L., Handke, N., Wittl, S., Herl, G., & Hausotte, T. (2025). Direct assessment of the influence of pose repeatability on the accuracy of dimensional measurements for computed tomography systems with high degrees of freedom. Measurement Science and Technology, 36(2), Article 025401. https://doi.org/10.1088/1361-6501/ada05a bibtex: '@article{Butzhammer_Handke_Wittl_Herl_Hausotte_2025, title={Direct assessment of the influence of pose repeatability on the accuracy of dimensional measurements for computed tomography systems with high degrees of freedom}, volume={36}, DOI={10.1088/1361-6501/ada05a}, number={2025401}, journal={Measurement Science and Technology}, publisher={IOP Publishing}, author={Butzhammer, Lorenz and Handke, Niklas and Wittl, Simon and Herl, Gabriel and Hausotte, Tino}, year={2025} }' chicago: Butzhammer, Lorenz, Niklas Handke, Simon Wittl, Gabriel Herl, and Tino Hausotte. “Direct Assessment of the Influence of Pose Repeatability on the Accuracy of Dimensional Measurements for Computed Tomography Systems with High Degrees of Freedom.” Measurement Science and Technology 36, no. 2 (2025). https://doi.org/10.1088/1361-6501/ada05a. ieee: 'L. Butzhammer, N. Handke, S. Wittl, G. Herl, and T. Hausotte, “Direct assessment of the influence of pose repeatability on the accuracy of dimensional measurements for computed tomography systems with high degrees of freedom,” Measurement Science and Technology, vol. 36, no. 2, Art. no. 025401, 2025, doi: 10.1088/1361-6501/ada05a.' mla: Butzhammer, Lorenz, et al. “Direct Assessment of the Influence of Pose Repeatability on the Accuracy of Dimensional Measurements for Computed Tomography Systems with High Degrees of Freedom.” Measurement Science and Technology, vol. 36, no. 2, 025401, IOP Publishing, 2025, doi:10.1088/1361-6501/ada05a. short: L. Butzhammer, N. Handke, S. Wittl, G. Herl, T. Hausotte, Measurement Science and Technology 36 (2025). date_created: 2025-10-14T13:50:32Z date_updated: 2026-02-12T10:45:36Z department: - _id: '630' doi: 10.1088/1361-6501/ada05a intvolume: ' 36' issue: '2' language: - iso: eng main_file_link: - open_access: '1' url: https://iopscience.iop.org/article/10.1088/1361-6501/ada05a/pdf oa: '1' project: - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' - _id: '133' name: TRR 285 - Project Area C - _id: '149' name: TRR 285 - Subproject C05 publication: Measurement Science and Technology publication_identifier: issn: - 0957-0233 - 1361-6501 publication_status: published publisher: IOP Publishing quality_controlled: '1' status: public title: Direct assessment of the influence of pose repeatability on the accuracy of dimensional measurements for computed tomography systems with high degrees of freedom type: journal_article user_id: '93720' volume: 36 year: '2025' ... --- _id: '64157' article_number: '104471' author: - first_name: Johannes full_name: Friedlein, Johannes last_name: Friedlein - first_name: Paul full_name: Steinmann, Paul last_name: Steinmann - first_name: Julia full_name: Mergheim, Julia last_name: Mergheim citation: ama: Friedlein J, Steinmann P, Mergheim J. One-way coupled staggered implementation of gradient-enhanced damage models coupled to thermoplasticity. Finite Elements in Analysis and Design. 2025;253. doi:10.1016/j.finel.2025.104471 apa: Friedlein, J., Steinmann, P., & Mergheim, J. (2025). One-way coupled staggered implementation of gradient-enhanced damage models coupled to thermoplasticity. Finite Elements in Analysis and Design, 253, Article 104471. https://doi.org/10.1016/j.finel.2025.104471 bibtex: '@article{Friedlein_Steinmann_Mergheim_2025, title={One-way coupled staggered implementation of gradient-enhanced damage models coupled to thermoplasticity}, volume={253}, DOI={10.1016/j.finel.2025.104471}, number={104471}, journal={Finite Elements in Analysis and Design}, publisher={Elsevier BV}, author={Friedlein, Johannes and Steinmann, Paul and Mergheim, Julia}, year={2025} }' chicago: Friedlein, Johannes, Paul Steinmann, and Julia Mergheim. “One-Way Coupled Staggered Implementation of Gradient-Enhanced Damage Models Coupled to Thermoplasticity.” Finite Elements in Analysis and Design 253 (2025). https://doi.org/10.1016/j.finel.2025.104471. ieee: 'J. Friedlein, P. Steinmann, and J. Mergheim, “One-way coupled staggered implementation of gradient-enhanced damage models coupled to thermoplasticity,” Finite Elements in Analysis and Design, vol. 253, Art. no. 104471, 2025, doi: 10.1016/j.finel.2025.104471.' mla: Friedlein, Johannes, et al. “One-Way Coupled Staggered Implementation of Gradient-Enhanced Damage Models Coupled to Thermoplasticity.” Finite Elements in Analysis and Design, vol. 253, 104471, Elsevier BV, 2025, doi:10.1016/j.finel.2025.104471. short: J. Friedlein, P. Steinmann, J. Mergheim, Finite Elements in Analysis and Design 253 (2025). date_created: 2026-02-16T06:56:31Z date_updated: 2026-02-16T06:59:05Z doi: 10.1016/j.finel.2025.104471 intvolume: ' 253' language: - iso: eng project: - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' - _id: '131' name: TRR 285 - Project Area A - _id: '139' name: TRR 285 - Subproject A05 publication: Finite Elements in Analysis and Design publication_identifier: issn: - 0168-874X publication_status: published publisher: Elsevier BV status: public title: One-way coupled staggered implementation of gradient-enhanced damage models coupled to thermoplasticity type: journal_article user_id: '84990' volume: 253 year: '2025' ... --- _id: '59872' abstract: - lang: eng text: Lightweight design is a driving concept in modern automotive engineering to minimize resource consumption over a vehicle's lifecycle through multi-material design, which relies on the use of joining techniques in car body fabrication. Multi-material design and the increasing trend towards producing large structural components using the megacasting process pose considerable challenges, particularly in the mechanical joining of aluminium-silicon (AlSi) castings. These castings typically exhibit low ductility and are prone to cracking when mechanically joined. Based on the excellent castability of hypoeutectic AlSi alloys, these are applied in sand casting and die casting as well as in megacasting. With a silicon content between 7 wt% and 12 wt%, these AlSi-alloys have a plate-like silicon phase that initiates cracks during mechanical joining. To enhance the joinability of castings, the research hypothesis is that improved solidification conditions enable a significant modification in the microstructure and therefore, increase the mechanical properties. During the manufacture of the castings using the sand casting process, the solidification conditions within the structural elements are varied to modify the microstructure to obtain castings with graded microstructure. The castings are evaluated using mechanical, microstructural and joining testing methods and finally, a microstructure-joinability correlation is established. article_number: '01081' article_type: original author: - first_name: Moritz full_name: Neuser, Moritz id: '32340' last_name: Neuser - first_name: Malte Christian full_name: Schlichter, Malte Christian id: '61977' last_name: Schlichter - first_name: Kay-Peter full_name: Hoyer, Kay-Peter id: '48411' last_name: Hoyer - first_name: Mathias full_name: Bobbert, Mathias id: '7850' last_name: Bobbert - first_name: Gerson full_name: Meschut, Gerson id: '32056' last_name: Meschut orcid: 0000-0002-2763-1246 - first_name: Mirko full_name: Schaper, Mirko id: '43720' last_name: Schaper citation: ama: Neuser M, Schlichter MC, Hoyer K-P, Bobbert M, Meschut G, Schaper M. Mechanical joinability of microstructurally graded structural components manufactured from hypoeutectic aluminium casting alloys. 44th Conference of the International Deep Drawing Research Group (IDDRG 2025). 2025;408. doi:10.1051/matecconf/202540801081 apa: Neuser, M., Schlichter, M. C., Hoyer, K.-P., Bobbert, M., Meschut, G., & Schaper, M. (2025). Mechanical joinability of microstructurally graded structural components manufactured from hypoeutectic aluminium casting alloys. 44th Conference of the International Deep Drawing Research Group (IDDRG 2025), 408, Article 01081. https://doi.org/10.1051/matecconf/202540801081 bibtex: '@article{Neuser_Schlichter_Hoyer_Bobbert_Meschut_Schaper_2025, title={Mechanical joinability of microstructurally graded structural components manufactured from hypoeutectic aluminium casting alloys}, volume={408}, DOI={10.1051/matecconf/202540801081}, number={01081}, journal={44th Conference of the International Deep Drawing Research Group (IDDRG 2025)}, author={Neuser, Moritz and Schlichter, Malte Christian and Hoyer, Kay-Peter and Bobbert, Mathias and Meschut, Gerson and Schaper, Mirko}, year={2025} }' chicago: Neuser, Moritz, Malte Christian Schlichter, Kay-Peter Hoyer, Mathias Bobbert, Gerson Meschut, and Mirko Schaper. “Mechanical Joinability of Microstructurally Graded Structural Components Manufactured from Hypoeutectic Aluminium Casting Alloys.” 44th Conference of the International Deep Drawing Research Group (IDDRG 2025) 408 (2025). https://doi.org/10.1051/matecconf/202540801081. ieee: 'M. Neuser, M. C. Schlichter, K.-P. Hoyer, M. Bobbert, G. Meschut, and M. Schaper, “Mechanical joinability of microstructurally graded structural components manufactured from hypoeutectic aluminium casting alloys,” 44th Conference of the International Deep Drawing Research Group (IDDRG 2025), vol. 408, Art. no. 01081, 2025, doi: 10.1051/matecconf/202540801081.' mla: Neuser, Moritz, et al. “Mechanical Joinability of Microstructurally Graded Structural Components Manufactured from Hypoeutectic Aluminium Casting Alloys.” 44th Conference of the International Deep Drawing Research Group (IDDRG 2025), vol. 408, 01081, 2025, doi:10.1051/matecconf/202540801081. short: M. Neuser, M.C. Schlichter, K.-P. Hoyer, M. Bobbert, G. Meschut, M. Schaper, 44th Conference of the International Deep Drawing Research Group (IDDRG 2025) 408 (2025). conference: end_date: 2025-06-05 location: Lissabon (Portugal) name: 44th Conference of the International Deep Drawing Research Group (IDDRG 2025) start_date: 2025-06-02 date_created: 2025-05-12T15:21:06Z date_updated: 2026-02-24T13:41:58Z department: - _id: '43' - _id: '158' - _id: '157' - _id: '9' - _id: '321' doi: 10.1051/matecconf/202540801081 intvolume: ' 408' keyword: - Joining - Casting - Self-pierce riveting - Aluminium casting alloy language: - iso: eng main_file_link: - open_access: '1' url: "\thttps://doi.org/10.1051/matecconf/202540801081" oa: '1' project: - _id: '131' name: 'TRR 285 - A: TRR 285 - Project Area A' - _id: '136' name: 'TRR 285 – A02: TRR 285 - Subproject A02' - _id: '135' name: 'TRR 285 – A01: TRR 285 - Subproject A01' - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' publication: 44th Conference of the International Deep Drawing Research Group (IDDRG 2025) publication_status: published quality_controlled: '1' status: public title: Mechanical joinability of microstructurally graded structural components manufactured from hypoeutectic aluminium casting alloys type: journal_article user_id: '7850' volume: 408 year: '2025' ... --- _id: '60977' abstract: - lang: eng text: In the development of advanced lightweight automotive solutions, self-piercing riveting (SPR) offers the possibility of joining multi-material structures to fulfil a wide variety of requirements. With regard to the entire process chain, production-related pre-deformations of the parts to be joined can influence the geometric shape and load capacity of SPR joints. Various studies have investigated the influence of pre-stretched sheet materials, in the sense of pre-drawing processes, on the formation of SPR joints. The impact of pre-stretching sheet metals on the formation of their geometrical characteristics and the shear-tensile strength of SPR processes was observed [1]. Pre-rolled semi-finished products are also joined together in mixed material automotive structures, e.g. tailor rolled blanks. This work aims to investigate the influence of pre-rolled joining parts on the geometric formation and load-carrying capacity of SPR joints. For this purpose, sheets of metal are cold-formed using a rolling process to induce a defined strain-hardening state in the material and then joined in various combinations. As the degree of deformation increases, the rolling of samples can lead to minimal accumulation of damage in the sheet materials, which can influence the joint behaviour. The rolling process, as well as the subsequent joining process, are also investigated by FEM. The influence of pre-rolled semi-finished products on the strength of the SPR joints is investigated. author: - first_name: Malte Christian full_name: Schlichter, Malte Christian id: '61977' last_name: Schlichter - first_name: Özcan full_name: Harabati, Özcan id: '54972' last_name: Harabati - first_name: Jean-Patrick full_name: Ludwig, Jean-Patrick id: '76631' last_name: Ludwig - first_name: Max full_name: Böhnke, Max id: '45779' last_name: Böhnke - first_name: Christian Roman full_name: Bielak, Christian Roman id: '34782' last_name: Bielak - first_name: Mathias full_name: Bobbert, Mathias id: '7850' last_name: Bobbert - first_name: Gerson full_name: Meschut, Gerson id: '32056' last_name: Meschut orcid: 0000-0002-2763-1246 citation: ama: 'Schlichter MC, Harabati Ö, Ludwig J-P, et al. Experimental and numerical investigation of the influence of rolling-induced sheet metal deformation on SPR joints. In: Materials Research Proceedings. Vol 54. Materials Research Forum LLC; 2025. doi:10.21741/9781644903599-148' apa: Schlichter, M. C., Harabati, Ö., Ludwig, J.-P., Böhnke, M., Bielak, C. R., Bobbert, M., & Meschut, G. (2025). Experimental and numerical investigation of the influence of rolling-induced sheet metal deformation on SPR joints. Materials Research Proceedings, 54. https://doi.org/10.21741/9781644903599-148 bibtex: '@inproceedings{Schlichter_Harabati_Ludwig_Böhnke_Bielak_Bobbert_Meschut_2025, title={Experimental and numerical investigation of the influence of rolling-induced sheet metal deformation on SPR joints}, volume={54}, DOI={10.21741/9781644903599-148}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Schlichter, Malte Christian and Harabati, Özcan and Ludwig, Jean-Patrick and Böhnke, Max and Bielak, Christian Roman and Bobbert, Mathias and Meschut, Gerson}, year={2025} }' chicago: Schlichter, Malte Christian, Özcan Harabati, Jean-Patrick Ludwig, Max Böhnke, Christian Roman Bielak, Mathias Bobbert, and Gerson Meschut. “Experimental and Numerical Investigation of the Influence of Rolling-Induced Sheet Metal Deformation on SPR Joints.” In Materials Research Proceedings, Vol. 54. Materials Research Forum LLC, 2025. https://doi.org/10.21741/9781644903599-148. ieee: 'M. C. Schlichter et al., “Experimental and numerical investigation of the influence of rolling-induced sheet metal deformation on SPR joints,” in Materials Research Proceedings, 2025, vol. 54, doi: 10.21741/9781644903599-148.' mla: Schlichter, Malte Christian, et al. “Experimental and Numerical Investigation of the Influence of Rolling-Induced Sheet Metal Deformation on SPR Joints.” Materials Research Proceedings, vol. 54, Materials Research Forum LLC, 2025, doi:10.21741/9781644903599-148. short: 'M.C. Schlichter, Ö. Harabati, J.-P. Ludwig, M. Böhnke, C.R. Bielak, M. Bobbert, G. Meschut, in: Materials Research Proceedings, Materials Research Forum LLC, 2025.' date_created: 2025-08-22T10:20:15Z date_updated: 2026-02-24T14:02:01Z department: - _id: '157' doi: 10.21741/9781644903599-148 intvolume: ' 54' language: - iso: eng project: - _id: '135' name: TRR 285 - Subproject A01 - _id: '131' name: TRR 285 - Project Area A - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' publication: Materials Research Proceedings publication_identifier: issn: - 2474-395X publication_status: published publisher: Materials Research Forum LLC quality_controlled: '1' status: public title: Experimental and numerical investigation of the influence of rolling-induced sheet metal deformation on SPR joints type: conference user_id: '7850' volume: 54 year: '2025' ... --- _id: '60978' abstract: - lang: eng text: The present study is an experimental analysis of the influence of pre-forming on the failure behaviour of clinched specimens under quasi-static and cyclic loading conditions. In this context, the geometric formation of the clinched joints is taken into account, with regard to the loading behaviour. The study also includes a comparison of the failure behaviour of quasi-static and cyclic tested specimen. Testing is done on non-pre-deformed and pre-deformed specimens. For this purpose, experimental investigations are carried out on two material combinations consisting of HCT590X steel sheet and EN AW-6014 T4 aluminium sheet. The focus is on the fatigue analysis of the clinched joints. The aim is to identify the failure modes under cyclic loading and the crack formation with regard to forming operations prior to the joining process. The investigations show that the cyclic load-bearing behaviour of the HCT590X joints is reduced by introducing a plastic pre-deformation of the to be joined parts. author: - first_name: Malte Christian full_name: Schlichter, Malte Christian id: '61977' last_name: Schlichter - first_name: Özcan full_name: Harabati, Özcan id: '54972' last_name: Harabati - first_name: Max full_name: Böhnke, Max id: '45779' last_name: Böhnke - first_name: Christian Roman full_name: Bielak, Christian Roman id: '34782' last_name: Bielak - first_name: Mathias full_name: Bobbert, Mathias id: '7850' last_name: Bobbert - first_name: Gerson full_name: Meschut, Gerson last_name: Meschut citation: ama: 'Schlichter MC, Harabati Ö, Böhnke M, Bielak CR, Bobbert M, Meschut G. Investigation on manufacturing-induced pre-deformation on the fatigue behaviour of clinched joints. In: Materials Research Proceedings. Vol 52. Materials Research Forum LLC; 2025. doi:10.21741/9781644903551-16' apa: Schlichter, M. C., Harabati, Ö., Böhnke, M., Bielak, C. R., Bobbert, M., & Meschut, G. (2025). Investigation on manufacturing-induced pre-deformation on the fatigue behaviour of clinched joints. Materials Research Proceedings, 52. https://doi.org/10.21741/9781644903551-16 bibtex: '@inproceedings{Schlichter_Harabati_Böhnke_Bielak_Bobbert_Meschut_2025, title={Investigation on manufacturing-induced pre-deformation on the fatigue behaviour of clinched joints}, volume={52}, DOI={10.21741/9781644903551-16}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Schlichter, Malte Christian and Harabati, Özcan and Böhnke, Max and Bielak, Christian Roman and Bobbert, Mathias and Meschut, Gerson}, year={2025} }' chicago: Schlichter, Malte Christian, Özcan Harabati, Max Böhnke, Christian Roman Bielak, Mathias Bobbert, and Gerson Meschut. “Investigation on Manufacturing-Induced Pre-Deformation on the Fatigue Behaviour of Clinched Joints.” In Materials Research Proceedings, Vol. 52. Materials Research Forum LLC, 2025. https://doi.org/10.21741/9781644903551-16. ieee: 'M. C. Schlichter, Ö. Harabati, M. Böhnke, C. R. Bielak, M. Bobbert, and G. Meschut, “Investigation on manufacturing-induced pre-deformation on the fatigue behaviour of clinched joints,” in Materials Research Proceedings, 2025, vol. 52, doi: 10.21741/9781644903551-16.' mla: Schlichter, Malte Christian, et al. “Investigation on Manufacturing-Induced Pre-Deformation on the Fatigue Behaviour of Clinched Joints.” Materials Research Proceedings, vol. 52, Materials Research Forum LLC, 2025, doi:10.21741/9781644903551-16. short: 'M.C. Schlichter, Ö. Harabati, M. Böhnke, C.R. Bielak, M. Bobbert, G. Meschut, in: Materials Research Proceedings, Materials Research Forum LLC, 2025.' date_created: 2025-08-22T10:45:56Z date_updated: 2026-02-24T14:02:35Z department: - _id: '157' doi: 10.21741/9781644903551-16 intvolume: ' 52' language: - iso: eng project: - _id: '131' name: TRR 285 - Project Area A - _id: '135' name: TRR 285 - Subproject A01 - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' publication: Materials Research Proceedings publication_identifier: issn: - 2474-395X publication_status: published publisher: Materials Research Forum LLC quality_controlled: '1' status: public title: Investigation on manufacturing-induced pre-deformation on the fatigue behaviour of clinched joints type: conference user_id: '7850' volume: 52 year: '2025' ... --- _id: '59587' abstract: - lang: eng text: Abstract. As a widely used sheet metal in clinched joints within the automotive industry, the aluminum alloy EN AW-6014 has been the focus of numerous studies. High-cycle fatigue (HCF) is a critical aspect when assessing the durability of clinched joints. In the present work, the HCF behavior of EN AW-6014 T4 was explored both experimentally and numerically. To model the fatigue behavior, Lemaitre’s two-scale damage model was used. Two key parameters, damage strength and damage exponent, are necessary for numerical investigations of HCF behavior. These parameters were determined through experiments with flat specimens and subsequently validated within a numerical model of clinched joints. The numerical results for fatigue match the experimental ones of the clinched joints quite well. author: - first_name: Chin full_name: Chen, Chin last_name: Chen - first_name: Malte Christian full_name: Schlichter, Malte Christian id: '61977' last_name: Schlichter - first_name: Sven full_name: Harzheim, Sven last_name: Harzheim - first_name: Martin full_name: Hofmann, Martin last_name: Hofmann - first_name: Mathias full_name: Bobbert, Mathias id: '7850' last_name: Bobbert - first_name: Gerson full_name: Meschut, Gerson id: '32056' last_name: Meschut orcid: 0000-0002-2763-1246 - first_name: Thomas full_name: Wallmersperger, Thomas last_name: Wallmersperger citation: ama: 'Chen C, Schlichter MC, Harzheim S, et al. High-cycle fatigue testing and parameter identification for numerical simulation of aluminum alloy EN AW-6014. In: Materials Research Proceedings. Vol 52. Materials Research Forum LLC; 2025. doi:10.21741/9781644903551-23' apa: Chen, C., Schlichter, M. C., Harzheim, S., Hofmann, M., Bobbert, M., Meschut, G., & Wallmersperger, T. (2025). High-cycle fatigue testing and parameter identification for numerical simulation of aluminum alloy EN AW-6014. Materials Research Proceedings, 52. https://doi.org/10.21741/9781644903551-23 bibtex: '@inproceedings{Chen_Schlichter_Harzheim_Hofmann_Bobbert_Meschut_Wallmersperger_2025, title={High-cycle fatigue testing and parameter identification for numerical simulation of aluminum alloy EN AW-6014}, volume={52}, DOI={10.21741/9781644903551-23}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Chen, Chin and Schlichter, Malte Christian and Harzheim, Sven and Hofmann, Martin and Bobbert, Mathias and Meschut, Gerson and Wallmersperger, Thomas}, year={2025} }' chicago: Chen, Chin, Malte Christian Schlichter, Sven Harzheim, Martin Hofmann, Mathias Bobbert, Gerson Meschut, and Thomas Wallmersperger. “High-Cycle Fatigue Testing and Parameter Identification for Numerical Simulation of Aluminum Alloy EN AW-6014.” In Materials Research Proceedings, Vol. 52. Materials Research Forum LLC, 2025. https://doi.org/10.21741/9781644903551-23. ieee: 'C. Chen et al., “High-cycle fatigue testing and parameter identification for numerical simulation of aluminum alloy EN AW-6014,” in Materials Research Proceedings, 2025, vol. 52, doi: 10.21741/9781644903551-23.' mla: Chen, Chin, et al. “High-Cycle Fatigue Testing and Parameter Identification for Numerical Simulation of Aluminum Alloy EN AW-6014.” Materials Research Proceedings, vol. 52, Materials Research Forum LLC, 2025, doi:10.21741/9781644903551-23. short: 'C. Chen, M.C. Schlichter, S. Harzheim, M. Hofmann, M. Bobbert, G. Meschut, T. Wallmersperger, in: Materials Research Proceedings, Materials Research Forum LLC, 2025.' date_created: 2025-04-15T11:14:53Z date_updated: 2026-02-24T13:43:56Z department: - _id: '157' doi: 10.21741/9781644903551-23 intvolume: ' 52' language: - iso: eng project: - _id: '131' name: 'TRR 285 - A: TRR 285 - Project Area A' - _id: '135' name: 'TRR 285 – A01: TRR 285 - Subproject A01' - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' publication: Materials Research Proceedings publication_identifier: issn: - 2474-395X publication_status: published publisher: Materials Research Forum LLC quality_controlled: '1' status: public title: High-cycle fatigue testing and parameter identification for numerical simulation of aluminum alloy EN AW-6014 type: conference user_id: '7850' volume: 52 year: '2025' ... --- _id: '60002' abstract: - lang: eng text: This study focuses on damage modeling across different mechanical joining processes within a process chain, specifically using clinching and self-pierce riveting (SPR). The aim is to apply a comprehensive model that captures the damage mechanisms and interactions in these technologies, optimizing them for enhanced performance and durability of aluminum joints. A GISSMO damage model was utilized, based on the stress states occurring during the joining process and a newly introduced damage testing method. This model was applied to both clinching and SPR processes. A detailed analysis of the stress states provided insights into their effect on the material. By incorporating these insights into the GISSMO model, improved accuracy in damage prediction was achieved. The model's application to clinching and SPR demonstrated its effectiveness in optimizing aluminum joint performance and durability, ensuring that the processes can be finely tuned to minimize damage and enhance joint quality. author: - first_name: Özcan full_name: Harabati, Özcan id: '54972' last_name: Harabati - first_name: Christian Roman full_name: Bielak, Christian Roman id: '34782' last_name: Bielak - first_name: Max full_name: Böhnke, Max id: '45779' last_name: Böhnke - first_name: Malte Christian full_name: Schlichter, Malte Christian id: '61977' last_name: Schlichter - first_name: Marc full_name: Brockmeier, Marc last_name: Brockmeier - first_name: Mathias full_name: Bobbert, Mathias id: '7850' last_name: Bobbert - first_name: Gerson full_name: Meschut, Gerson id: '32056' last_name: Meschut orcid: 0000-0002-2763-1246 citation: ama: 'Harabati Ö, Bielak CR, Böhnke M, et al. Cross-process damage modeling: A process-chain case study of clinching and self-pierced riveting for aluminum connections. In: Materials Research Proceedings. Vol 52. Materials Research Forum LLC; 2025. doi:10.21741/9781644903551-19' apa: 'Harabati, Ö., Bielak, C. R., Böhnke, M., Schlichter, M. C., Brockmeier, M., Bobbert, M., & Meschut, G. (2025). Cross-process damage modeling: A process-chain case study of clinching and self-pierced riveting for aluminum connections. Materials Research Proceedings, 52. https://doi.org/10.21741/9781644903551-19' bibtex: '@inproceedings{Harabati_Bielak_Böhnke_Schlichter_Brockmeier_Bobbert_Meschut_2025, title={Cross-process damage modeling: A process-chain case study of clinching and self-pierced riveting for aluminum connections}, volume={52}, DOI={10.21741/9781644903551-19}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Harabati, Özcan and Bielak, Christian Roman and Böhnke, Max and Schlichter, Malte Christian and Brockmeier, Marc and Bobbert, Mathias and Meschut, Gerson}, year={2025} }' chicago: 'Harabati, Özcan, Christian Roman Bielak, Max Böhnke, Malte Christian Schlichter, Marc Brockmeier, Mathias Bobbert, and Gerson Meschut. “Cross-Process Damage Modeling: A Process-Chain Case Study of Clinching and Self-Pierced Riveting for Aluminum Connections.” In Materials Research Proceedings, Vol. 52. Materials Research Forum LLC, 2025. https://doi.org/10.21741/9781644903551-19.' ieee: 'Ö. Harabati et al., “Cross-process damage modeling: A process-chain case study of clinching and self-pierced riveting for aluminum connections,” in Materials Research Proceedings, 2025, vol. 52, doi: 10.21741/9781644903551-19.' mla: 'Harabati, Özcan, et al. “Cross-Process Damage Modeling: A Process-Chain Case Study of Clinching and Self-Pierced Riveting for Aluminum Connections.” Materials Research Proceedings, vol. 52, Materials Research Forum LLC, 2025, doi:10.21741/9781644903551-19.' short: 'Ö. Harabati, C.R. Bielak, M. Böhnke, M.C. Schlichter, M. Brockmeier, M. Bobbert, G. Meschut, in: Materials Research Proceedings, Materials Research Forum LLC, 2025.' date_created: 2025-05-20T12:50:34Z date_updated: 2026-02-24T13:59:43Z doi: 10.21741/9781644903551-19 intvolume: ' 52' language: - iso: eng project: - _id: '131' name: 'TRR 285 - A: TRR 285 - Project Area A' - _id: '135' name: 'TRR 285 – A01: TRR 285 - Subproject A01' - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' publication: Materials Research Proceedings publication_identifier: issn: - 2474-395X publication_status: published publisher: Materials Research Forum LLC quality_controlled: '1' status: public title: 'Cross-process damage modeling: A process-chain case study of clinching and self-pierced riveting for aluminum connections' type: conference user_id: '7850' volume: 52 year: '2025' ... --- _id: '59584' article_number: '100299' author: - first_name: Johannes full_name: Friedlein, Johannes last_name: Friedlein - first_name: Stephan full_name: Lüder, Stephan last_name: Lüder - first_name: Jan full_name: Kalich, Jan last_name: Kalich - first_name: Hans Christian full_name: Schmale, Hans Christian last_name: Schmale - first_name: Max full_name: Böhnke, Max id: '45779' last_name: Böhnke - first_name: Malte Christian full_name: Schlichter, Malte Christian id: '61977' last_name: Schlichter - first_name: Mathias full_name: Bobbert, Mathias id: '7850' last_name: Bobbert - first_name: Gerson full_name: Meschut, Gerson id: '32056' last_name: Meschut orcid: 0000-0002-2763-1246 - first_name: Paul full_name: Steinmann, Paul last_name: Steinmann - first_name: Julia full_name: Mergheim, Julia last_name: Mergheim citation: ama: Friedlein J, Lüder S, Kalich J, et al. Application of stress-state-dependent ductile damage and failure model to clinch joining for a wide range of tool and material combinations. Journal of Advanced Joining Processes. 2025;11. doi:10.1016/j.jajp.2025.100299 apa: Friedlein, J., Lüder, S., Kalich, J., Schmale, H. C., Böhnke, M., Schlichter, M. C., Bobbert, M., Meschut, G., Steinmann, P., & Mergheim, J. (2025). Application of stress-state-dependent ductile damage and failure model to clinch joining for a wide range of tool and material combinations. Journal of Advanced Joining Processes, 11, Article 100299. https://doi.org/10.1016/j.jajp.2025.100299 bibtex: '@article{Friedlein_Lüder_Kalich_Schmale_Böhnke_Schlichter_Bobbert_Meschut_Steinmann_Mergheim_2025, title={Application of stress-state-dependent ductile damage and failure model to clinch joining for a wide range of tool and material combinations}, volume={11}, DOI={10.1016/j.jajp.2025.100299}, number={100299}, journal={Journal of Advanced Joining Processes}, publisher={Elsevier BV}, author={Friedlein, Johannes and Lüder, Stephan and Kalich, Jan and Schmale, Hans Christian and Böhnke, Max and Schlichter, Malte Christian and Bobbert, Mathias and Meschut, Gerson and Steinmann, Paul and Mergheim, Julia}, year={2025} }' chicago: Friedlein, Johannes, Stephan Lüder, Jan Kalich, Hans Christian Schmale, Max Böhnke, Malte Christian Schlichter, Mathias Bobbert, Gerson Meschut, Paul Steinmann, and Julia Mergheim. “Application of Stress-State-Dependent Ductile Damage and Failure Model to Clinch Joining for a Wide Range of Tool and Material Combinations.” Journal of Advanced Joining Processes 11 (2025). https://doi.org/10.1016/j.jajp.2025.100299. ieee: 'J. Friedlein et al., “Application of stress-state-dependent ductile damage and failure model to clinch joining for a wide range of tool and material combinations,” Journal of Advanced Joining Processes, vol. 11, Art. no. 100299, 2025, doi: 10.1016/j.jajp.2025.100299.' mla: Friedlein, Johannes, et al. “Application of Stress-State-Dependent Ductile Damage and Failure Model to Clinch Joining for a Wide Range of Tool and Material Combinations.” Journal of Advanced Joining Processes, vol. 11, 100299, Elsevier BV, 2025, doi:10.1016/j.jajp.2025.100299. short: J. Friedlein, S. Lüder, J. Kalich, H.C. Schmale, M. Böhnke, M.C. Schlichter, M. Bobbert, G. Meschut, P. Steinmann, J. Mergheim, Journal of Advanced Joining Processes 11 (2025). date_created: 2025-04-15T11:00:56Z date_updated: 2026-02-24T14:00:55Z doi: 10.1016/j.jajp.2025.100299 intvolume: ' 11' language: - iso: eng project: - _id: '131' name: 'TRR 285 - A: TRR 285 - Project Area A' - _id: '135' name: 'TRR 285 – A01: TRR 285 - Subproject A01' - _id: '138' name: 'TRR 285 – A04: TRR 285 - Subproject A04' - _id: '139' name: 'TRR 285 – A05: TRR 285 - Subproject A05' - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' publication: Journal of Advanced Joining Processes publication_identifier: issn: - 2666-3309 publication_status: published publisher: Elsevier BV quality_controlled: '1' status: public title: Application of stress-state-dependent ductile damage and failure model to clinch joining for a wide range of tool and material combinations type: journal_article user_id: '7850' volume: 11 year: '2025' ... --- _id: '60440' abstract: - lang: eng text: The versatile self-pierce riveting (V-SPR) is a further development of semi-tubular self-pierce riveting. V-SPR enables adaptation to changing boundary conditions, such as a change in the material thickness combination, without varying the rivet die combination due to increased punch actuation and the use of multi-range capable rivets [1]. The inner punch first sets the rivet. The outer punch then forms the rivet head to the respective sheet thickness. For this, the rivet requires a hard shank and a ductile rivet head, which is achieved by an inductive local hardening process [2]. Until now, the joint formation of rivets with graded hardness profile has been challenging to estimate in the FEM simulation due to the inhomogeneous material conditions in the rivet. In this study, a method capable of reproducing the experimentally determined hardness levels of rivets in detail is shown. This FE model enables the realistic modelling of the mechanical properties of the rivet on the basis of the hardness profile in order to predict the correct deformation processes and stresses during the riveting process. First, the detailed experimental hardness mapping of the locally heat-treated rivets is transferred into the FE model. The FEM material model can predict the local strength of the rivet based on hardness by scaling the flow curves. To estimate the predictive capability of the FEM model, the joint formation of rivets with different graded hardness profiles is compared experimentally and simulative. Based on the validated model, the influence of different rivet hardness profiles on the joint formation is analysed numerically. By adapting the material model, a high level of correlation between the experiment's joint formation and the simulation can be achieved. author: - first_name: Pia Katharina full_name: Holtkamp, Pia Katharina id: '44935' last_name: Holtkamp - first_name: Christian Roman full_name: Bielak, Christian Roman id: '34782' last_name: Bielak - first_name: Mathias full_name: Bobbert, Mathias id: '7850' last_name: Bobbert - first_name: Gerson full_name: Meschut, Gerson id: '32056' last_name: Meschut orcid: 0000-0002-2763-1246 citation: ama: 'Holtkamp PK, Bielak CR, Bobbert M, Meschut G. Simulation of the joining process of graded hardened multi-range capable rivets. In: Materials Research Proceedings. Vol 54. Materials Research Forum LLC; 2025. doi:10.21741/9781644903599-153' apa: Holtkamp, P. K., Bielak, C. R., Bobbert, M., & Meschut, G. (2025). Simulation of the joining process of graded hardened multi-range capable rivets. Materials Research Proceedings, 54. https://doi.org/10.21741/9781644903599-153 bibtex: '@inproceedings{Holtkamp_Bielak_Bobbert_Meschut_2025, title={Simulation of the joining process of graded hardened multi-range capable rivets}, volume={54}, DOI={10.21741/9781644903599-153}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Holtkamp, Pia Katharina and Bielak, Christian Roman and Bobbert, Mathias and Meschut, Gerson}, year={2025} }' chicago: Holtkamp, Pia Katharina, Christian Roman Bielak, Mathias Bobbert, and Gerson Meschut. “Simulation of the Joining Process of Graded Hardened Multi-Range Capable Rivets.” In Materials Research Proceedings, Vol. 54. Materials Research Forum LLC, 2025. https://doi.org/10.21741/9781644903599-153. ieee: 'P. K. Holtkamp, C. R. Bielak, M. Bobbert, and G. Meschut, “Simulation of the joining process of graded hardened multi-range capable rivets,” in Materials Research Proceedings, 2025, vol. 54, doi: 10.21741/9781644903599-153.' mla: Holtkamp, Pia Katharina, et al. “Simulation of the Joining Process of Graded Hardened Multi-Range Capable Rivets.” Materials Research Proceedings, vol. 54, Materials Research Forum LLC, 2025, doi:10.21741/9781644903599-153. short: 'P.K. Holtkamp, C.R. Bielak, M. Bobbert, G. Meschut, in: Materials Research Proceedings, Materials Research Forum LLC, 2025.' date_created: 2025-06-27T08:23:00Z date_updated: 2026-02-24T14:12:10Z department: - _id: '43' - _id: '157' doi: 10.21741/9781644903599-153 intvolume: ' 54' language: - iso: eng project: - _id: '130' name: 'TRR 285: TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' - _id: '133' name: 'TRR 285 - C: TRR 285 - Project Area C' - _id: '146' name: 'TRR 285 – C02: TRR 285 - Subproject C02' - _id: '131' name: 'TRR 285 - A: TRR 285 - Project Area A' - _id: '135' name: 'TRR 285 – A01: TRR 285 - Subproject A01' publication: Materials Research Proceedings publication_identifier: issn: - 2474-395X publication_status: published publisher: Materials Research Forum LLC quality_controlled: '1' status: public title: Simulation of the joining process of graded hardened multi-range capable rivets type: conference user_id: '7850' volume: 54 year: '2025' ... --- _id: '64562' abstract: - lang: ger text: Für das Verständnis und die Weiterentwicklung temperaturgestützter mechanischer Fü-geprozesse mit thermoplastischen Faser-Kunststoff-Verbunden (FKV) ist die zerstörungsfreie Analyse der Materialstruktur im Inneren des Fügepunktes während der Entstehung und Belastung erforderlich. Die Kombination aus Prüfung unter Temperatureinfluss und in situ Computertomographie (CT) eröffnet neue Möglichkeiten für die Fügeprozessanalyse. Dazu wurde dazu eine Thermokammer entwickelt und in eine bestehende in situ CT-Anlage integriert. Anwendungsszenarien sind die Herstellung und Prüfung von Fügepunkten unter Temperatur. Die Erwärmung erfolgt über einzeln regelbare Heizzonen, welche eine gezielte Temperaturführung über die gesamte Probengeometrie ermöglichen. Die Temperaturkurve eines Aufheizversuchs, sowie eine Röntgenprojektion einer Probe innerhalb der Thermokammer validie-ren die Konstruktion. author: - first_name: Alrik full_name: Dargel, Alrik id: '114764' last_name: Dargel - first_name: Daniel full_name: Köhler, Daniel id: '83408' last_name: Köhler - first_name: Maik full_name: Gude, Maik last_name: Gude - first_name: Robert full_name: Kupfer, Robert last_name: Kupfer citation: ama: 'Dargel A, Köhler D, Gude M, Kupfer R. In situ CT unter Temperatur: Thermokammer für thermoplastische FKV-Fügeprozesse. In: Zimmermann M, ed. Tagungsband 43. Vortrags- und Diskussionstagung Werkstoffprüfung 2025. Vol 43. Deutsche Gesellschaft für Materialkunde e.V. (DGM); 2025:165-170.' apa: 'Dargel, A., Köhler, D., Gude, M., & Kupfer, R. (2025). In situ CT unter Temperatur: Thermokammer für thermoplastische FKV-Fügeprozesse. In M. Zimmermann (Ed.), Tagungsband 43. Vortrags- und Diskussionstagung Werkstoffprüfung 2025 (Vol. 43, pp. 165–170). Deutsche Gesellschaft für Materialkunde e.V. (DGM).' bibtex: '@inproceedings{Dargel_Köhler_Gude_Kupfer_2025, place={Sankt Augustin}, title={In situ CT unter Temperatur: Thermokammer für thermoplastische FKV-Fügeprozesse}, volume={43}, booktitle={Tagungsband 43. Vortrags- und Diskussionstagung Werkstoffprüfung 2025}, publisher={Deutsche Gesellschaft für Materialkunde e.V. (DGM)}, author={Dargel, Alrik and Köhler, Daniel and Gude, Maik and Kupfer, Robert}, editor={Zimmermann, Martina}, year={2025}, pages={165–170} }' chicago: 'Dargel, Alrik, Daniel Köhler, Maik Gude, and Robert Kupfer. “In situ CT unter Temperatur: Thermokammer für thermoplastische FKV-Fügeprozesse.” In Tagungsband 43. Vortrags- und Diskussionstagung Werkstoffprüfung 2025, edited by Martina Zimmermann, 43:165–70. Sankt Augustin: Deutsche Gesellschaft für Materialkunde e.V. (DGM), 2025.' ieee: 'A. Dargel, D. Köhler, M. Gude, and R. Kupfer, “In situ CT unter Temperatur: Thermokammer für thermoplastische FKV-Fügeprozesse,” in Tagungsband 43. Vortrags- und Diskussionstagung Werkstoffprüfung 2025, Dresden, 2025, vol. 43, pp. 165–170.' mla: 'Dargel, Alrik, et al. “In situ CT unter Temperatur: Thermokammer für thermoplastische FKV-Fügeprozesse.” Tagungsband 43. Vortrags- und Diskussionstagung Werkstoffprüfung 2025, edited by Martina Zimmermann, vol. 43, Deutsche Gesellschaft für Materialkunde e.V. (DGM), 2025, pp. 165–70.' short: 'A. Dargel, D. Köhler, M. Gude, R. Kupfer, in: M. Zimmermann (Ed.), Tagungsband 43. Vortrags- und Diskussionstagung Werkstoffprüfung 2025, Deutsche Gesellschaft für Materialkunde e.V. (DGM), Sankt Augustin, 2025, pp. 165–170.' conference: end_date: 2025-11-28 location: Dresden name: 43. Vortrags- und Diskussionstagung Werkstoffprüfung 2025 start_date: 2025-11-27 date_created: 2026-02-20T14:17:33Z date_updated: 2026-02-24T15:12:59Z ddc: - '620' editor: - first_name: Martina full_name: Zimmermann, Martina last_name: Zimmermann file: - access_level: closed content_type: application/pdf creator: adargel date_created: 2026-02-20T14:14:36Z date_updated: 2026-02-20T14:14:36Z file_id: '64564' file_name: V-31-Dargel_v03.pdf file_size: 398450 relation: main_file success: 1 file_date_updated: 2026-02-20T14:14:36Z has_accepted_license: '1' intvolume: ' 43' keyword: - in situ CT - Thermokammer - Thermoplastische FKV language: - iso: ger page: 165-170 place: Sankt Augustin project: - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' - _id: '148' name: TRR 285 - Subproject C04 publication: Tagungsband 43. Vortrags- und Diskussionstagung Werkstoffprüfung 2025 publication_identifier: isbn: - 978-3-88355-454-9 publication_status: published publisher: Deutsche Gesellschaft für Materialkunde e.V. (DGM) status: public title: 'In situ CT unter Temperatur: Thermokammer für thermoplastische FKV-Fügeprozesse' type: conference user_id: '114764' volume: 43 year: '2025' ... --- _id: '61767' abstract: - lang: eng text: "Abstract\r\n A clinch point’s quality is usually assessed using ex situ destructive testing methods. These, however, are unable to detect phenomena immediately during the joining process. For instance, elastic deformations reverse and cracks close after unloading. In situ methods such as the force-displacement evaluation are used to investigate a clinching process, though deviations in the clinch point geometry cannot be derived with this method. To overcome these limitations, the clinching process can be investigated using in situ computed tomography (in situ CT). When investigating the clinching of aluminum parts in in situ CT, the sheet-sheet interface is hardly visible. Earlier investigations showed that radiopaque materials can be applied between the joining parts to enhance the detectability of the sheet-sheet interface. However, the layers cause strong artefacts, break during the clinching process or change the clinch joint’s properties significantly. In this paper, a minimally invasive method to enhance the interface detectability is presented. First, the aluminum oxide layer is removed by etching. Second, the specimen is electroplated with copper or gold, respectively. In some cases, a mask is applied to create a cross-shaped plating pattern. Then, the plated specimen is clinched with a non-plated counterpart and the interface detectability of the clinch points is assessed in CT scans. It is shown that a copper plating of 2.6–4 μm can visualize some parts of the interface, while 7–9 μm is suitable to enhance the detectability of the sheet-sheet interface almost continuously." article_number: '131' article_type: original author: - first_name: Daniel full_name: Köhler, Daniel id: '83408' last_name: Köhler - first_name: Alrik full_name: Dargel, Alrik id: '114764' last_name: Dargel - first_name: Juliane full_name: Troschitz, Juliane last_name: Troschitz - first_name: Maik full_name: Gude, Maik last_name: Gude - first_name: Robert full_name: Kupfer, Robert last_name: Kupfer citation: ama: Köhler D, Dargel A, Troschitz J, Gude M, Kupfer R. In Situ CT of Clinch Points – Enhancing Interface Detectability Using Electroplated Patterns of Radiopaque Materials. Journal of Nondestructive Evaluation. 2025;44(4). doi:10.1007/s10921-025-01270-1 apa: Köhler, D., Dargel, A., Troschitz, J., Gude, M., & Kupfer, R. (2025). In Situ CT of Clinch Points – Enhancing Interface Detectability Using Electroplated Patterns of Radiopaque Materials. Journal of Nondestructive Evaluation, 44(4), Article 131. https://doi.org/10.1007/s10921-025-01270-1 bibtex: '@article{Köhler_Dargel_Troschitz_Gude_Kupfer_2025, title={In Situ CT of Clinch Points – Enhancing Interface Detectability Using Electroplated Patterns of Radiopaque Materials}, volume={44}, DOI={10.1007/s10921-025-01270-1}, number={4131}, journal={Journal of Nondestructive Evaluation}, publisher={Springer Science and Business Media LLC}, author={Köhler, Daniel and Dargel, Alrik and Troschitz, Juliane and Gude, Maik and Kupfer, Robert}, year={2025} }' chicago: Köhler, Daniel, Alrik Dargel, Juliane Troschitz, Maik Gude, and Robert Kupfer. “In Situ CT of Clinch Points – Enhancing Interface Detectability Using Electroplated Patterns of Radiopaque Materials.” Journal of Nondestructive Evaluation 44, no. 4 (2025). https://doi.org/10.1007/s10921-025-01270-1. ieee: 'D. Köhler, A. Dargel, J. Troschitz, M. Gude, and R. Kupfer, “In Situ CT of Clinch Points – Enhancing Interface Detectability Using Electroplated Patterns of Radiopaque Materials,” Journal of Nondestructive Evaluation, vol. 44, no. 4, Art. no. 131, 2025, doi: 10.1007/s10921-025-01270-1.' mla: Köhler, Daniel, et al. “In Situ CT of Clinch Points – Enhancing Interface Detectability Using Electroplated Patterns of Radiopaque Materials.” Journal of Nondestructive Evaluation, vol. 44, no. 4, 131, Springer Science and Business Media LLC, 2025, doi:10.1007/s10921-025-01270-1. short: D. Köhler, A. Dargel, J. Troschitz, M. Gude, R. Kupfer, Journal of Nondestructive Evaluation 44 (2025). date_created: 2025-10-09T08:27:41Z date_updated: 2026-02-24T15:13:52Z doi: 10.1007/s10921-025-01270-1 intvolume: ' 44' issue: '4' language: - iso: eng project: - _id: '133' name: TRR 285 - Project Area C - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' - _id: '148' name: TRR 285 - Subproject C04 publication: Journal of Nondestructive Evaluation publication_identifier: issn: - 0195-9298 - 1573-4862 publication_status: published publisher: Springer Science and Business Media LLC status: public title: In Situ CT of Clinch Points – Enhancing Interface Detectability Using Electroplated Patterns of Radiopaque Materials type: journal_article user_id: '114764' volume: 44 year: '2025' ... --- _id: '61161' abstract: - lang: eng text: "Abstract\r\n The effects of corrosion on clinched joints are not completely understood yet. Recent research indicates that galvanic corrosion can actually enhance the fatigue life of clinched joints. It is then of significant interest to investigate the effects of another corrosion phenomenon, pitting corrosion, on the fatigue behavior of clinched joints. Pitting corrosion occurs in passive metals and can lead to stress concentrations. In the present study, the effects of pitting corrosion are investigated by using Lemaitre’s two-scale fatigue model with a 2D geometry of clinched joints. A slip condition is applied as a boundary condition to simplify the clinched joint model and reduce the computational cost of solving the contact mechanics problem. Additionally, a method to determine the damage strength and the damage exponent used in the two-scale damage model is introduced. Numerical simulations reveal that pitting corrosion reduces the fatigue life of clinched joints, particularly when it occurs on the internal surface in the neck area." author: - first_name: Chin full_name: Chen, Chin id: '114741' last_name: Chen - first_name: Sven full_name: Harzheim, Sven last_name: Harzheim - first_name: Martin full_name: Hofmann, Martin last_name: Hofmann - first_name: Thomas full_name: Wallmersperger, Thomas last_name: Wallmersperger citation: ama: Chen C, Harzheim S, Hofmann M, Wallmersperger T. Numerical investigation of the effects of pitting corrosion on high-cycle fatigue of clinched joints. Acta Mechanica. Published online 2025. doi:10.1007/s00707-025-04234-8 apa: Chen, C., Harzheim, S., Hofmann, M., & Wallmersperger, T. (2025). Numerical investigation of the effects of pitting corrosion on high-cycle fatigue of clinched joints. Acta Mechanica. https://doi.org/10.1007/s00707-025-04234-8 bibtex: '@article{Chen_Harzheim_Hofmann_Wallmersperger_2025, title={Numerical investigation of the effects of pitting corrosion on high-cycle fatigue of clinched joints}, DOI={10.1007/s00707-025-04234-8}, journal={Acta Mechanica}, publisher={Springer Science and Business Media LLC}, author={Chen, Chin and Harzheim, Sven and Hofmann, Martin and Wallmersperger, Thomas}, year={2025} }' chicago: Chen, Chin, Sven Harzheim, Martin Hofmann, and Thomas Wallmersperger. “Numerical Investigation of the Effects of Pitting Corrosion on High-Cycle Fatigue of Clinched Joints.” Acta Mechanica, 2025. https://doi.org/10.1007/s00707-025-04234-8. ieee: 'C. Chen, S. Harzheim, M. Hofmann, and T. Wallmersperger, “Numerical investigation of the effects of pitting corrosion on high-cycle fatigue of clinched joints,” Acta Mechanica, 2025, doi: 10.1007/s00707-025-04234-8.' mla: Chen, Chin, et al. “Numerical Investigation of the Effects of Pitting Corrosion on High-Cycle Fatigue of Clinched Joints.” Acta Mechanica, Springer Science and Business Media LLC, 2025, doi:10.1007/s00707-025-04234-8. short: C. Chen, S. Harzheim, M. Hofmann, T. Wallmersperger, Acta Mechanica (2025). date_created: 2025-09-10T07:52:43Z date_updated: 2026-02-24T15:11:39Z doi: 10.1007/s00707-025-04234-8 language: - iso: eng project: - _id: '142' name: TRR 285 - Subproject B03 - _id: '132' name: TRR 285 - Project Area B - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' publication: Acta Mechanica publication_identifier: issn: - 0001-5970 - 1619-6937 publication_status: published publisher: Springer Science and Business Media LLC status: public title: Numerical investigation of the effects of pitting corrosion on high-cycle fatigue of clinched joints type: journal_article user_id: '114741' year: '2025' ... --- _id: '61411' abstract: - lang: eng text: "Abstract\r\n The effect of corrosion on mechanically joined components is not well understood. While recent research shows that a brief exposure of clinched specimens to a salt spray environment improves the specimens’ fatigue life, other research shows a decrease in load bearing capabilities with increasing corrosion times. These studies primarily focus on galvanic corrosion. It is not entirely clear how other corrosion phenomena, such as pitting corrosion, affect the fatigue life of clinched joints. In this work, a numerical model is used, which is able to simulate corrosion pit growth in EN AW-6014. The experimental polarization data of EN AW-6014 are used directly in the calculation of the interface kinetics parameter of the model." author: - first_name: Sven full_name: Harzheim, Sven last_name: Harzheim - first_name: Chin full_name: Chen, Chin id: '114741' last_name: Chen - first_name: Katharina full_name: Hollmer, Katharina last_name: Hollmer - first_name: Martin full_name: Hofmann, Martin last_name: Hofmann - first_name: Martina full_name: Zimmermann, Martina last_name: Zimmermann - first_name: Thomas full_name: Wallmersperger, Thomas last_name: Wallmersperger citation: ama: Harzheim S, Chen C, Hollmer K, Hofmann M, Zimmermann M, Wallmersperger T. Numerical investigation of pitting corrosion in clinched joints. Acta Mechanica. Published online 2025. doi:10.1007/s00707-025-04248-2 apa: Harzheim, S., Chen, C., Hollmer, K., Hofmann, M., Zimmermann, M., & Wallmersperger, T. (2025). Numerical investigation of pitting corrosion in clinched joints. Acta Mechanica. https://doi.org/10.1007/s00707-025-04248-2 bibtex: '@article{Harzheim_Chen_Hollmer_Hofmann_Zimmermann_Wallmersperger_2025, title={Numerical investigation of pitting corrosion in clinched joints}, DOI={10.1007/s00707-025-04248-2}, journal={Acta Mechanica}, publisher={Springer Science and Business Media LLC}, author={Harzheim, Sven and Chen, Chin and Hollmer, Katharina and Hofmann, Martin and Zimmermann, Martina and Wallmersperger, Thomas}, year={2025} }' chicago: Harzheim, Sven, Chin Chen, Katharina Hollmer, Martin Hofmann, Martina Zimmermann, and Thomas Wallmersperger. “Numerical Investigation of Pitting Corrosion in Clinched Joints.” Acta Mechanica, 2025. https://doi.org/10.1007/s00707-025-04248-2. ieee: 'S. Harzheim, C. Chen, K. Hollmer, M. Hofmann, M. Zimmermann, and T. Wallmersperger, “Numerical investigation of pitting corrosion in clinched joints,” Acta Mechanica, 2025, doi: 10.1007/s00707-025-04248-2.' mla: Harzheim, Sven, et al. “Numerical Investigation of Pitting Corrosion in Clinched Joints.” Acta Mechanica, Springer Science and Business Media LLC, 2025, doi:10.1007/s00707-025-04248-2. short: S. Harzheim, C. Chen, K. Hollmer, M. Hofmann, M. Zimmermann, T. Wallmersperger, Acta Mechanica (2025). date_created: 2025-09-23T11:58:18Z date_updated: 2026-02-24T15:12:17Z doi: 10.1007/s00707-025-04248-2 language: - iso: eng project: - _id: '132' name: TRR 285 - Project Area B - _id: '142' name: TRR 285 - Subproject B03 - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' publication: Acta Mechanica publication_identifier: issn: - 0001-5970 - 1619-6937 publication_status: published publisher: Springer Science and Business Media LLC status: public title: Numerical investigation of pitting corrosion in clinched joints type: journal_article user_id: '114741' year: '2025' ... --- _id: '62079' abstract: - lang: eng text: This paper investigates two modeling approaches for the simulation of the deformation and decomposition behavior of preconsolidated rovings above the thermoplastic matrix{\textquoteright} melting temperature. This is crucial for capturing the local material structure after processes introducing highly localized deformation such as mechanical joining processes between metal and fiber reinforced thermoplastics (FRTP). A generic finite element (FE) model is developed, incorporating interfaces discretized through either cohesive zone (CZ) elements or Coulomb friction-based contacts. The material parameters for the FE elements are derived from the initial stiffness of a statistical volume element (SVE) at micro scale modelled with an Arbitrary-Lagrange-Eulerian method for three load cases. The CZ properties calculated are based on the shear viscosity of the composite. The CZ and contact modelling approaches are evaluated using three load cases of the SVE, comparing force-displacement curves. Under simple loading conditions, such as normal pressure tension and bending, both methods produce similar results; however, in complex load cases, the CZ approach shows clear advantages in handling interface interactions and shows robust simulations. The CZ approach thus presents a promising method for simulating roving decomposition in FRTP-metal joining applications above the matrix{\textquoteright} melting temperature. author: - first_name: Benjamin full_name: Gröger, Benjamin last_name: Gröger - first_name: Johannes full_name: Gerritzen, Johannes id: '105344' last_name: Gerritzen orcid: 0000-0002-0169-8602 - first_name: Andreas full_name: Hornig, Andreas last_name: Hornig - first_name: Maik full_name: Gude, Maik last_name: Gude citation: ama: 'Gröger B, Gerritzen J, Hornig A, Gude M. Modeling approaches for the decomposition behavior of preconsolidated rovings throughout local deformation processes. In: Meschut G, Bobbert M, Duflou J, et al., eds. Sheet Metal 2025. Materials Research Proceedings. Materials Research Forum LLC, Materials Research Foundations; 2025:268–275. doi:10.21741/9781644903551-33' apa: Gröger, B., Gerritzen, J., Hornig, A., & Gude, M. (2025). Modeling approaches for the decomposition behavior of preconsolidated rovings throughout local deformation processes. In G. Meschut, M. Bobbert, J. Duflou, L. Fratini, H. Hagenah, P. Martins, M. Merklein, & F. Micari (Eds.), Sheet Metal 2025 (pp. 268–275). Materials Research Forum LLC, Materials Research Foundations. https://doi.org/10.21741/9781644903551-33 bibtex: '@inproceedings{Gröger_Gerritzen_Hornig_Gude_2025, series={Materials Research Proceedings}, title={Modeling approaches for the decomposition behavior of preconsolidated rovings throughout local deformation processes}, DOI={10.21741/9781644903551-33}, booktitle={Sheet Metal 2025}, publisher={Materials Research Forum LLC, Materials Research Foundations}, author={Gröger, Benjamin and Gerritzen, Johannes and Hornig, Andreas and Gude, Maik}, editor={Meschut, G. and Bobbert, M. and Duflou, J. and Fratini, L. and Hagenah, H. and Martins, P. and Merklein, M. and Micari, F.}, year={2025}, pages={268–275}, collection={Materials Research Proceedings} }' chicago: Gröger, Benjamin, Johannes Gerritzen, Andreas Hornig, and Maik Gude. “Modeling Approaches for the Decomposition Behavior of Preconsolidated Rovings throughout Local Deformation Processes.” In Sheet Metal 2025, edited by G. Meschut, M. Bobbert, J. Duflou, L. Fratini, H. Hagenah, P. Martins, M. Merklein, and F. Micari, 268–275. Materials Research Proceedings. Materials Research Forum LLC, Materials Research Foundations, 2025. https://doi.org/10.21741/9781644903551-33. ieee: 'B. Gröger, J. Gerritzen, A. Hornig, and M. Gude, “Modeling approaches for the decomposition behavior of preconsolidated rovings throughout local deformation processes,” in Sheet Metal 2025, 2025, pp. 268–275, doi: 10.21741/9781644903551-33.' mla: Gröger, Benjamin, et al. “Modeling Approaches for the Decomposition Behavior of Preconsolidated Rovings throughout Local Deformation Processes.” Sheet Metal 2025, edited by G. Meschut et al., Materials Research Forum LLC, Materials Research Foundations, 2025, pp. 268–275, doi:10.21741/9781644903551-33. short: 'B. Gröger, J. Gerritzen, A. Hornig, M. Gude, in: G. Meschut, M. Bobbert, J. Duflou, L. Fratini, H. Hagenah, P. Martins, M. Merklein, F. Micari (Eds.), Sheet Metal 2025, Materials Research Forum LLC, Materials Research Foundations, 2025, pp. 268–275.' date_created: 2025-11-04T12:48:21Z date_updated: 2026-02-27T06:43:19Z doi: 10.21741/9781644903551-33 editor: - first_name: G. full_name: Meschut, G. last_name: Meschut - first_name: M. full_name: Bobbert, M. last_name: Bobbert - first_name: J. full_name: Duflou, J. last_name: Duflou - first_name: L. full_name: Fratini, L. last_name: Fratini - first_name: H. full_name: Hagenah, H. last_name: Hagenah - first_name: P. full_name: Martins, P. last_name: Martins - first_name: M. full_name: Merklein, M. last_name: Merklein - first_name: F. full_name: Micari, F. last_name: Micari keyword: - Finite Element Method (FEM) - Process - Thermoplastic Fiber Reinforced Plastic language: - iso: eng page: 268–275 project: - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' - _id: '137' name: TRR 285 - Subproject A03 - _id: '131' name: TRR 285 - Project Area A publication: Sheet Metal 2025 publication_identifier: isbn: - 978-1-64490-354-4 publisher: Materials Research Forum LLC, Materials Research Foundations series_title: Materials Research Proceedings status: public title: Modeling approaches for the decomposition behavior of preconsolidated rovings throughout local deformation processes type: conference user_id: '105344' year: '2025' ... --- _id: '62080' abstract: - lang: eng text: The failure behavior of fiber reinforced polymers (FRP) is strongly influenced by their microstructure, i.e. fiber arrangement or local fiber volume content. However, this information cannot be directly used for structural analyses, since it requires a discretization on micrometer level. Therefore, current failure theories do not directly account for such effects, but describe the behavior averaged over an entire specimen. This foundation in experimentally accessible loading conditions leads to purely theory based extension to more complex stress states without direct validation possibilities. This work aims at leveraging micro-scale simulations to obtain failure information under arbitrary loading conditions. The results are propagated to the meso-scale, enabling efficient structural analyses, by means of machine learning (ML). It is shown that the ML model is capable of correctly assessing previously unseen stress states and therefore poses an efficient tool of exploiting information from the micro-scale in larger simulations. author: - first_name: Johannes full_name: Gerritzen, Johannes id: '105344' last_name: Gerritzen orcid: 0000-0002-0169-8602 - first_name: Andreas full_name: Hornig, Andreas last_name: Hornig - first_name: Maik full_name: Gude, Maik last_name: Gude citation: ama: 'Gerritzen J, Hornig A, Gude M. Efficient failure information propagation under complex stress states in fiber reinforced polymers: From micro- to meso-scale using machine learning. In: Meschut G, Bobbert M, Duflou J, et al., eds. Sheet Metal 2025. Materials Research Proceedings. Materials Research Forum LLC, Materials Research Foundations; 2025:260–267. doi:10.21741/9781644903551-32' apa: 'Gerritzen, J., Hornig, A., & Gude, M. (2025). Efficient failure information propagation under complex stress states in fiber reinforced polymers: From micro- to meso-scale using machine learning. In G. Meschut, M. Bobbert, J. Duflou, L. Fratini, H. Hagenah, P. Martins, M. Merklein, & F. Micari (Eds.), Sheet Metal 2025 (pp. 260–267). Materials Research Forum LLC, Materials Research Foundations. https://doi.org/10.21741/9781644903551-32' bibtex: '@inproceedings{Gerritzen_Hornig_Gude_2025, series={Materials Research Proceedings}, title={Efficient failure information propagation under complex stress states in fiber reinforced polymers: From micro- to meso-scale using machine learning}, DOI={10.21741/9781644903551-32}, booktitle={Sheet Metal 2025}, publisher={Materials Research Forum LLC, Materials Research Foundations}, author={Gerritzen, Johannes and Hornig, Andreas and Gude, Maik}, editor={Meschut, G. and Bobbert, M. and Duflou, J. and Fratini, L. and Hagenah, H. and Martins, P. and Merklein, M. and Micari, F.}, year={2025}, pages={260–267}, collection={Materials Research Proceedings} }' chicago: 'Gerritzen, Johannes, Andreas Hornig, and Maik Gude. “Efficient Failure Information Propagation under Complex Stress States in Fiber Reinforced Polymers: From Micro- to Meso-Scale Using Machine Learning.” In Sheet Metal 2025, edited by G. Meschut, M. Bobbert, J. Duflou, L. Fratini, H. Hagenah, P. Martins, M. Merklein, and F. Micari, 260–267. Materials Research Proceedings. Materials Research Forum LLC, Materials Research Foundations, 2025. https://doi.org/10.21741/9781644903551-32.' ieee: 'J. Gerritzen, A. Hornig, and M. Gude, “Efficient failure information propagation under complex stress states in fiber reinforced polymers: From micro- to meso-scale using machine learning,” in Sheet Metal 2025, 2025, pp. 260–267, doi: 10.21741/9781644903551-32.' mla: 'Gerritzen, Johannes, et al. “Efficient Failure Information Propagation under Complex Stress States in Fiber Reinforced Polymers: From Micro- to Meso-Scale Using Machine Learning.” Sheet Metal 2025, edited by G. Meschut et al., Materials Research Forum LLC, Materials Research Foundations, 2025, pp. 260–267, doi:10.21741/9781644903551-32.' short: 'J. Gerritzen, A. Hornig, M. Gude, in: G. Meschut, M. Bobbert, J. Duflou, L. Fratini, H. Hagenah, P. Martins, M. Merklein, F. Micari (Eds.), Sheet Metal 2025, Materials Research Forum LLC, Materials Research Foundations, 2025, pp. 260–267.' date_created: 2025-11-04T12:48:37Z date_updated: 2026-02-27T06:43:37Z doi: 10.21741/9781644903551-32 editor: - first_name: G. full_name: Meschut, G. last_name: Meschut - first_name: M. full_name: Bobbert, M. last_name: Bobbert - first_name: J. full_name: Duflou, J. last_name: Duflou - first_name: L. full_name: Fratini, L. last_name: Fratini - first_name: H. full_name: Hagenah, H. last_name: Hagenah - first_name: P. full_name: Martins, P. last_name: Martins - first_name: M. full_name: Merklein, M. last_name: Merklein - first_name: F. full_name: Micari, F. last_name: Micari keyword: - Failure - Fiber Reinforced Plastic - Machine Learning language: - iso: eng page: 260–267 project: - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' - _id: '137' name: TRR 285 - Subproject A03 - _id: '131' name: TRR 285 - Project Area A publication: Sheet Metal 2025 publication_identifier: isbn: - 978-1-64490-354-4 publisher: Materials Research Forum LLC, Materials Research Foundations series_title: Materials Research Proceedings status: public title: 'Efficient failure information propagation under complex stress states in fiber reinforced polymers: From micro- to meso-scale using machine learning' type: conference user_id: '105344' year: '2025' ... --- _id: '62081' article_number: '114969' author: - first_name: Johannes full_name: Gerritzen, Johannes id: '105344' last_name: Gerritzen orcid: 0000-0002-0169-8602 - first_name: Benjamin full_name: Gröger, Benjamin last_name: Gröger - first_name: Matthias full_name: Zscheyge, Matthias last_name: Zscheyge - first_name: Andreas full_name: Hornig, Andreas last_name: Hornig - first_name: Maik full_name: Gude, Maik last_name: Gude citation: ama: Gerritzen J, Gröger B, Zscheyge M, Hornig A, Gude M. 3D viscoelastic plastic model coupled with a continuum damage formulation for fiber reinforced polymers. Materials &amp; Design. 2025;260. doi:10.1016/j.matdes.2025.114969 apa: Gerritzen, J., Gröger, B., Zscheyge, M., Hornig, A., & Gude, M. (2025). 3D viscoelastic plastic model coupled with a continuum damage formulation for fiber reinforced polymers. Materials &amp; Design, 260, Article 114969. https://doi.org/10.1016/j.matdes.2025.114969 bibtex: '@article{Gerritzen_Gröger_Zscheyge_Hornig_Gude_2025, title={3D viscoelastic plastic model coupled with a continuum damage formulation for fiber reinforced polymers}, volume={260}, DOI={10.1016/j.matdes.2025.114969}, number={114969}, journal={Materials &amp; Design}, publisher={Elsevier BV}, author={Gerritzen, Johannes and Gröger, Benjamin and Zscheyge, Matthias and Hornig, Andreas and Gude, Maik}, year={2025} }' chicago: Gerritzen, Johannes, Benjamin Gröger, Matthias Zscheyge, Andreas Hornig, and Maik Gude. “3D Viscoelastic Plastic Model Coupled with a Continuum Damage Formulation for Fiber Reinforced Polymers.” Materials &amp; Design 260 (2025). https://doi.org/10.1016/j.matdes.2025.114969. ieee: 'J. Gerritzen, B. Gröger, M. Zscheyge, A. Hornig, and M. Gude, “3D viscoelastic plastic model coupled with a continuum damage formulation for fiber reinforced polymers,” Materials &amp; Design, vol. 260, Art. no. 114969, 2025, doi: 10.1016/j.matdes.2025.114969.' mla: Gerritzen, Johannes, et al. “3D Viscoelastic Plastic Model Coupled with a Continuum Damage Formulation for Fiber Reinforced Polymers.” Materials &amp; Design, vol. 260, 114969, Elsevier BV, 2025, doi:10.1016/j.matdes.2025.114969. short: J. Gerritzen, B. Gröger, M. Zscheyge, A. Hornig, M. Gude, Materials &amp; Design 260 (2025). date_created: 2025-11-04T12:49:13Z date_updated: 2026-02-27T06:43:55Z doi: 10.1016/j.matdes.2025.114969 intvolume: ' 260' language: - iso: eng project: - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' - _id: '137' name: TRR 285 - Subproject A03 - _id: '131' name: TRR 285 - Project Area A publication: Materials & Design publication_identifier: issn: - 0264-1275 publication_status: published publisher: Elsevier BV status: public title: 3D viscoelastic plastic model coupled with a continuum damage formulation for fiber reinforced polymers type: journal_article user_id: '105344' volume: 260 year: '2025' ... --- _id: '63828' article_number: '100368' author: - first_name: Johannes full_name: Gerritzen, Johannes id: '105344' last_name: Gerritzen orcid: 0000-0002-0169-8602 - first_name: Kunal full_name: Chopra, Kunal last_name: Chopra - first_name: Gregor full_name: Reschke, Gregor id: '98812' last_name: Reschke - first_name: Andreas full_name: Hornig, Andreas last_name: Hornig - first_name: Alexander full_name: Brosius, Alexander last_name: Brosius - first_name: Maik full_name: Gude, Maik last_name: Gude citation: ama: Gerritzen J, Chopra K, Reschke G, Hornig A, Brosius A, Gude M. Quality assurance of clinched joints using explainable machine learning. Journal of Advanced Joining Processes. 2025;13. doi:10.1016/j.jajp.2025.100368 apa: Gerritzen, J., Chopra, K., Reschke, G., Hornig, A., Brosius, A., & Gude, M. (2025). Quality assurance of clinched joints using explainable machine learning. Journal of Advanced Joining Processes, 13, Article 100368. https://doi.org/10.1016/j.jajp.2025.100368 bibtex: '@article{Gerritzen_Chopra_Reschke_Hornig_Brosius_Gude_2025, title={Quality assurance of clinched joints using explainable machine learning}, volume={13}, DOI={10.1016/j.jajp.2025.100368}, number={100368}, journal={Journal of Advanced Joining Processes}, publisher={Elsevier BV}, author={Gerritzen, Johannes and Chopra, Kunal and Reschke, Gregor and Hornig, Andreas and Brosius, Alexander and Gude, Maik}, year={2025} }' chicago: Gerritzen, Johannes, Kunal Chopra, Gregor Reschke, Andreas Hornig, Alexander Brosius, and Maik Gude. “Quality Assurance of Clinched Joints Using Explainable Machine Learning.” Journal of Advanced Joining Processes 13 (2025). https://doi.org/10.1016/j.jajp.2025.100368. ieee: 'J. Gerritzen, K. Chopra, G. Reschke, A. Hornig, A. Brosius, and M. Gude, “Quality assurance of clinched joints using explainable machine learning,” Journal of Advanced Joining Processes, vol. 13, Art. no. 100368, 2025, doi: 10.1016/j.jajp.2025.100368.' mla: Gerritzen, Johannes, et al. “Quality Assurance of Clinched Joints Using Explainable Machine Learning.” Journal of Advanced Joining Processes, vol. 13, 100368, Elsevier BV, 2025, doi:10.1016/j.jajp.2025.100368. short: J. Gerritzen, K. Chopra, G. Reschke, A. Hornig, A. Brosius, M. Gude, Journal of Advanced Joining Processes 13 (2025). date_created: 2026-02-02T08:32:04Z date_updated: 2026-02-27T06:45:47Z doi: 10.1016/j.jajp.2025.100368 intvolume: ' 13' language: - iso: eng project: - _id: '137' name: TRR 285 - Subproject A03 - _id: '131' name: TRR 285 - Project Area A - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' - _id: '133' name: TRR 285 - Project Area C - _id: '148' name: TRR 285 - Subproject C04 publication: Journal of Advanced Joining Processes publication_identifier: issn: - 2666-3309 publication_status: published publisher: Elsevier BV status: public title: Quality assurance of clinched joints using explainable machine learning type: journal_article user_id: '105344' volume: 13 year: '2025' ... --- _id: '59441' abstract: - lang: eng text: 'Abstract. Accurate Finite Element Modeling (FEM) of joints is essential in the design of complex mechanical systems such as automotive body-in-white (BIW) structures, as it plays a critical role in evaluating their performance. Although well-established techniques exist for modeling rotationally symmetric joints, there remains a significant gap in effectively modeling non-rotationally symmetric joints. These joints are particularly relevant in the automotive BIW, where they can better accommodate anisotropic loading conditions. In this study, strategies for modeling non-rotationally symmetric joints were explored using finite element simulations in LS-DYNA. The findings demonstrate that discrete beam elements can capture the anisotropic characteristics of such joints. Two models were tested: a single-beam model for stiffness periodicity every 90°, and a three-beam model for stiffness periodicity every 120°. Force responses, stress distribution, and sheet bending behaviors were analyzed, confirming that discrete beam elements can accurately represent direction-dependent stiffness. These results establish a foundation for developing advanced joint modeling strategies in complex mechanical systems.' author: - first_name: Deekshith Reddy full_name: Devulapally, Deekshith Reddy id: '76837' last_name: Devulapally - first_name: Thomas full_name: Tröster, Thomas id: '553' last_name: Tröster citation: ama: 'Devulapally DR, Tröster T. Modelling strategies for non-rotationally symmetric joints. In: Materials Research Proceedings. Vol 52. Materials Research Forum LLC; 2025. doi:10.21741/9781644903551-21' apa: Devulapally, D. R., & Tröster, T. (2025). Modelling strategies for non-rotationally symmetric joints. Materials Research Proceedings, 52. https://doi.org/10.21741/9781644903551-21 bibtex: '@inproceedings{Devulapally_Tröster_2025, title={Modelling strategies for non-rotationally symmetric joints}, volume={52}, DOI={10.21741/9781644903551-21}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Devulapally, Deekshith Reddy and Tröster, Thomas}, year={2025} }' chicago: Devulapally, Deekshith Reddy, and Thomas Tröster. “Modelling Strategies for Non-Rotationally Symmetric Joints.” In Materials Research Proceedings, Vol. 52. Materials Research Forum LLC, 2025. https://doi.org/10.21741/9781644903551-21. ieee: 'D. R. Devulapally and T. Tröster, “Modelling strategies for non-rotationally symmetric joints,” in Materials Research Proceedings, Paderborn, 2025, vol. 52, doi: 10.21741/9781644903551-21.' mla: Devulapally, Deekshith Reddy, and Thomas Tröster. “Modelling Strategies for Non-Rotationally Symmetric Joints.” Materials Research Proceedings, vol. 52, Materials Research Forum LLC, 2025, doi:10.21741/9781644903551-21. short: 'D.R. Devulapally, T. Tröster, in: Materials Research Proceedings, Materials Research Forum LLC, 2025.' conference: end_date: 2025-04-03 location: Paderborn name: '21st International conference on sheet metal ' start_date: 2025-04-01 date_created: 2025-04-08T14:57:51Z date_updated: 2026-02-27T10:50:10Z department: - _id: '149' - _id: '9' - _id: '321' doi: 10.21741/9781644903551-21 intvolume: ' 52' language: - iso: eng project: - _id: '140' name: 'TRR 285 – B01: TRR 285 - Subproject B01' - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' publication: Materials Research Proceedings publication_identifier: issn: - 2474-395X publication_status: published publisher: Materials Research Forum LLC status: public title: Modelling strategies for non-rotationally symmetric joints type: conference user_id: '76837' volume: 52 year: '2025' ... --- _id: '61524' author: - first_name: Jonathan-Markus full_name: Einwag, Jonathan-Markus last_name: Einwag - first_name: Christian full_name: Steinfelder, Christian last_name: Steinfelder - first_name: Sandro full_name: Wartzack, Sandro last_name: Wartzack - first_name: Alexander full_name: Brosius, Alexander last_name: Brosius - first_name: Stefan full_name: Goetz, Stefan last_name: Goetz citation: ama: 'Einwag J-M, Steinfelder C, Wartzack S, Brosius A, Goetz S. From simulation to metamodel to experiment: Evaluating the prediction accuracy of polynomial regression models for clinch joint properties. Journal of Manufacturing Processes. 2025;154:179-191. doi:10.1016/j.jmapro.2025.09.059' apa: 'Einwag, J.-M., Steinfelder, C., Wartzack, S., Brosius, A., & Goetz, S. (2025). From simulation to metamodel to experiment: Evaluating the prediction accuracy of polynomial regression models for clinch joint properties. Journal of Manufacturing Processes, 154, 179–191. https://doi.org/10.1016/j.jmapro.2025.09.059' bibtex: '@article{Einwag_Steinfelder_Wartzack_Brosius_Goetz_2025, title={From simulation to metamodel to experiment: Evaluating the prediction accuracy of polynomial regression models for clinch joint properties}, volume={154}, DOI={10.1016/j.jmapro.2025.09.059}, journal={Journal of Manufacturing Processes}, publisher={Elsevier BV}, author={Einwag, Jonathan-Markus and Steinfelder, Christian and Wartzack, Sandro and Brosius, Alexander and Goetz, Stefan}, year={2025}, pages={179–191} }' chicago: 'Einwag, Jonathan-Markus, Christian Steinfelder, Sandro Wartzack, Alexander Brosius, and Stefan Goetz. “From Simulation to Metamodel to Experiment: Evaluating the Prediction Accuracy of Polynomial Regression Models for Clinch Joint Properties.” Journal of Manufacturing Processes 154 (2025): 179–91. https://doi.org/10.1016/j.jmapro.2025.09.059.' ieee: 'J.-M. Einwag, C. Steinfelder, S. Wartzack, A. Brosius, and S. Goetz, “From simulation to metamodel to experiment: Evaluating the prediction accuracy of polynomial regression models for clinch joint properties,” Journal of Manufacturing Processes, vol. 154, pp. 179–191, 2025, doi: 10.1016/j.jmapro.2025.09.059.' mla: 'Einwag, Jonathan-Markus, et al. “From Simulation to Metamodel to Experiment: Evaluating the Prediction Accuracy of Polynomial Regression Models for Clinch Joint Properties.” Journal of Manufacturing Processes, vol. 154, Elsevier BV, 2025, pp. 179–91, doi:10.1016/j.jmapro.2025.09.059.' short: J.-M. Einwag, C. Steinfelder, S. Wartzack, A. Brosius, S. Goetz, Journal of Manufacturing Processes 154 (2025) 179–191. date_created: 2025-10-06T07:37:24Z date_updated: 2025-11-12T08:35:35Z department: - _id: '43' - _id: '157' doi: 10.1016/j.jmapro.2025.09.059 intvolume: ' 154' language: - iso: eng page: 179-191 project: - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' - _id: '132' name: TRR 285 - Project Area B - _id: '140' name: TRR 285 - Subproject B01 - _id: '144' name: TRR 285 - Subproject B05 publication: Journal of Manufacturing Processes publication_identifier: issn: - 1526-6125 publication_status: published publisher: Elsevier BV status: public title: 'From simulation to metamodel to experiment: Evaluating the prediction accuracy of polynomial regression models for clinch joint properties' type: journal_article user_id: '107109' volume: 154 year: '2025' ... --- _id: '62725' abstract: - lang: ger text: "Aluminium-Silizium-Legierungen (AlSi) werden insbesondere bei der gießtechnischen\r\nHerstellung von Leichtbaukomponenten für Fahrzeuge verwendet. Dieses Legierungssystem hat hervorragende\r\nGießeigenschaften bei gleichzeitig akzeptablen mechanischen Eigenschaften. Aufgrund des hohen\r\nSilizium-(Si)-Gehaltes, wodurch die Volumenkontraktion im Phasenübergang von flüssig-fest nahezu\r\nunterbunden wird, neigen AlSi-Legierungen dazu, feinere oder gröbere Si-Platten bei unterschiedlichen\r\nErstarrungsgeschwindigkeiten zu bilden. Um die mechanischen Eigenschaften zu verbessern, werden\r\ndem Legierungssystem in der Schmelzphase entweder Natrium (Na) oder Strontium (Sr) zugesetzt. Dies\r\nhat zur Folge, dass sich eine fein lamellare Si-Morphologie bei der Erstarrung ausbildet; dies kann ebenfalls\r\ndurch hohe Erstarrungsgeschwindigkeiten erreicht werden. Ein nachfolgendes Lösungsglühen bewirkt\r\neine Sphäroidisierung der Si-Partikel und dient der Steigerung der Duktilität. Aktuell fehlen fundierte\r\nErkenntnisse zur Ausprägung der Si-Morphologie in Abhängigkeit der Erstarrungsgeschwindigkeit oder\r\ninfolge einer Wärmebehandlung. Vor diesem Hintergrund werden in dieser Studie verschiedene Behandlungsparameter\r\nin Bezug auf das Einformverhalten der Si-Partikel mit einem bildauswertenden Verfahren\r\nevaluiert sowie unter Bezug auf verschiedene chemische Zusammensetzungen miteinander korreliert." - lang: eng text: "Aluminium-silicon alloys (AlSi) are used in the casting of lightweight vehicle components. This\r\nalloy system has excellent casting properties accompanied by acceptable mechanical properties. Due to\r\nthe high silicon (Si) content, which almost completely prevents volume contraction during the liquid-solid\r\nphase transition, AlSi alloys tend to form finer or coarser Si plates at different solidification rates. To\r\nimprove the mechanical properties, either sodium (Na) or strontium (Sr) is added to the alloy system in\r\nthe melting phase. This results in the formation of a fine lamellar Si morphology during solidification, which\r\ncan also be achieved by high solidification rates. Subsequent solution annealing causes spheroidisation\r\nof the Si particles and increases ductility. Currently, there is a lack in scientific knowledge regarding the\r\nSi-morphology as a function of solidification rate or as a result of heat treatment. Therefore, this study\r\nevaluates various treatment parameters in relation to the shaping behaviour of Si particles using an image\r\nanalysis method and correlates them with different chemical compositions." alternative_title: - Image analysis method for evaluating the microstructure of AlSi-alloys author: - first_name: Moritz full_name: Neuser, Moritz id: '32340' last_name: Neuser - first_name: Gerrit full_name: Cichon, Gerrit last_name: Cichon - first_name: Kay-Peter full_name: Hoyer, Kay-Peter id: '48411' last_name: Hoyer - first_name: Mirko full_name: Schaper, Mirko id: '43720' last_name: Schaper citation: ama: 'Neuser M, Cichon G, Hoyer K-P, Schaper M. Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen. In: Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen. Vol 43. Deutsche Gesellschaft für Materialkunde (DGM); 2025:454-459.' apa: Neuser, M., Cichon, G., Hoyer, K.-P., & Schaper, M. (2025). Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen. Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen, 43, 454–459. bibtex: '@inproceedings{Neuser_Cichon_Hoyer_Schaper_2025, place={Sankt Augustin}, title={Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen}, volume={43}, booktitle={Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen}, publisher={Deutsche Gesellschaft für Materialkunde (DGM)}, author={Neuser, Moritz and Cichon, Gerrit and Hoyer, Kay-Peter and Schaper, Mirko}, year={2025}, pages={454–459} }' chicago: 'Neuser, Moritz, Gerrit Cichon, Kay-Peter Hoyer, and Mirko Schaper. “Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen.” In Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen, 43:454–59. Sankt Augustin: Deutsche Gesellschaft für Materialkunde (DGM), 2025.' ieee: M. Neuser, G. Cichon, K.-P. Hoyer, and M. Schaper, “Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen,” in Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen, Dresden, 2025, vol. 43, pp. 454–459. mla: Neuser, Moritz, et al. “Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen.” Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen, vol. 43, Deutsche Gesellschaft für Materialkunde (DGM), 2025, pp. 454–59. short: 'M. Neuser, G. Cichon, K.-P. Hoyer, M. Schaper, in: Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen, Deutsche Gesellschaft für Materialkunde (DGM), Sankt Augustin, 2025, pp. 454–459.' conference: end_date: 2025-11-28 location: Dresden name: Werkstoffprüfung - 43. Vortrags- und Diskussionstagung Werkstoffprüfung 2025 start_date: 2025-11-27 date_created: 2025-12-01T13:46:42Z date_updated: 2025-12-01T13:46:53Z department: - _id: '43' - _id: '9' - _id: '158' - _id: '321' intvolume: ' 43' keyword: - Bildauswertendes Verfahren - Mikrostrukturanalyse - AlSi-System - Si-Morphologie language: - iso: ger page: 454 - 459 place: Sankt Augustin project: - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' - _id: '131' name: TRR 285 - Project Area A - _id: '136' name: TRR 285 - Subproject A02 publication: Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen publication_identifier: isbn: - 978-3-88355-454-9 publication_status: published publisher: Deutsche Gesellschaft für Materialkunde (DGM) quality_controlled: '1' status: public title: Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen type: conference user_id: '32340' volume: 43 year: '2025' ...