--- _id: '58495' abstract: - lang: eng text: To reduce CO2 emissions, the industry, particularly in the mobility sector, focuses on lightweight vehicles with multi-material structures. As thermal joining processes are reaching their limits, mechanical techniques such as self-piercing riveting are being used. One innovative solution is the versatile self-piercing riveting process (V-SPR), which combines different material combinations with a multi-range rivet. 1 The joining process is divided into the piercing process and the forming process of the rivet head to the respective sheet thickness. The rivet shaft requires sufficient strength to punch through the punch-sided sheet, and sufficient ductility of the rivet head is required to form onto the punch-sided sheet. To achieve a combination of these requirements, local inductive heat treatment strategies are used for the rivet. To ensure reproducible rivet hardening, a specialised device has been developed for precise rivet positioning in the induction coil and the subsequent quenching process. The heat treatment differs in terms of hardening times and temperatures. In addition, the heat treatment is combined with a subsequent tempering process. The study aims to determine the resulting hardness distributions and microstructures of the rivet and to investigate the influence of different heat treatment strategies on joint formation and load-bearing capacities. The results show that a graded hardening profile has a positive effect on the spreading behaviour of the rivet foot and the forming behaviour of the rivet head. Furthermore, the load-bearing behaviour of the joints is increased. author: - first_name: Pia Katharina full_name: Holtkamp, Pia Katharina id: '44935' last_name: Holtkamp - first_name: Fabian full_name: Kappe, Fabian id: '66459' last_name: Kappe - first_name: Paula full_name: Probst, Paula last_name: Probst - 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, Kappe F, Probst P, Bobbert M, Meschut G. Investigation of local heat treatment strategies for a multi-range capable rivet and the influence on joint formation and load-bearing capacity. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. Published online 2025. doi:10.1177/14644207241307508' apa: 'Holtkamp, P. K., Kappe, F., Probst, P., Bobbert, M., & Meschut, G. (2025). Investigation of local heat treatment strategies for a multi-range capable rivet and the influence on joint formation and load-bearing capacity. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. https://doi.org/10.1177/14644207241307508' bibtex: '@article{Holtkamp_Kappe_Probst_Bobbert_Meschut_2025, title={Investigation of local heat treatment strategies for a multi-range capable rivet and the influence on joint formation and load-bearing capacity}, DOI={10.1177/14644207241307508}, journal={Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications}, publisher={SAGE Publications}, author={Holtkamp, Pia Katharina and Kappe, Fabian and Probst, Paula and Bobbert, Mathias and Meschut, Gerson}, year={2025} }' chicago: 'Holtkamp, Pia Katharina, Fabian Kappe, Paula Probst, Mathias Bobbert, and Gerson Meschut. “Investigation of Local Heat Treatment Strategies for a Multi-Range Capable Rivet and the Influence on Joint Formation and Load-Bearing Capacity.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 2025. https://doi.org/10.1177/14644207241307508.' ieee: 'P. K. Holtkamp, F. Kappe, P. Probst, M. Bobbert, and G. Meschut, “Investigation of local heat treatment strategies for a multi-range capable rivet and the influence on joint formation and load-bearing capacity,” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 2025, doi: 10.1177/14644207241307508.' mla: 'Holtkamp, Pia Katharina, et al. “Investigation of Local Heat Treatment Strategies for a Multi-Range Capable Rivet and the Influence on Joint Formation and Load-Bearing Capacity.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, SAGE Publications, 2025, doi:10.1177/14644207241307508.' short: 'P.K. Holtkamp, F. Kappe, P. Probst, M. Bobbert, G. Meschut, Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications (2025).' date_created: 2025-02-03T09:26:32Z date_updated: 2025-02-03T09:36:32Z department: - _id: '43' - _id: '157' doi: 10.1177/14644207241307508 language: - iso: eng project: - _id: '133' name: 'TRR 285 - C: TRR 285 - Project Area C' - _id: '130' grant_number: '418701707' name: 'TRR 285: TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' publication: 'Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications' publication_identifier: issn: - 1464-4207 - 2041-3076 publication_status: published publisher: SAGE Publications quality_controlled: '1' status: public title: Investigation of local heat treatment strategies for a multi-range capable rivet and the influence on joint formation and load-bearing capacity type: journal_article user_id: '44935' year: '2025' ... --- _id: '59870' abstract: - lang: eng text: |- One of the most important strategies for reducing CO 2 emissions in the mobility sector is lightweight construction. In particular, the car body offers several opportunities for weight reduction. Multi-material designs are increasingly being applied to select the most suitable material for the respective load and ultimately achieve synergy effects. For example, aluminium castings are used at the nodes of a spaceframe body. Subsequently, these are joined with profiles to form the bodyshell. To join different materials mechanical joining techniques, such as semi-tubular self-piercing riveting, are deployed. According to the current state of the art, cracks occur in the aluminium castings during the mechanical joining process as a result of the high degree of deformation. Although the aluminium casting alloys of the AlSi-system exhibit low ductility, these alloys reveal excellent castability. In particular, the ability to cast thin structural parts is enabled by the low liquidus point of the near eutectic aluminium casting alloys. This study addresses the mechanical joining properties of the near eutectic aluminium casting alloy AlSi12, depending on different microstructures. These are achieved by annealing processes and modifying agents. Through an adapted heat treatment, the previously lamellar morphology can be transformed into a globular morphology, which leads to increased ductility and prevents the formation of cracks during the self-piercing riveting (SPR). The joinability is investigated using different die geometries, whereas the joint formation is analysed regarding crack initiation. To evaluate the increased ductility, microstructural and mechanical tests are performed and finally, a microstructure-joinability correlation is established. author: - first_name: M. full_name: Neuser, M. last_name: Neuser - first_name: P.-K. full_name: Holtkamp, P.-K. last_name: Holtkamp - first_name: K.-P. full_name: Hoyer, K.-P. last_name: Hoyer - first_name: F. full_name: Kappe, F. last_name: Kappe - first_name: S. full_name: Yildiz, S. last_name: Yildiz - first_name: M. full_name: Bobbert, M. last_name: Bobbert - first_name: G. full_name: Meschut, G. last_name: Meschut - first_name: M. full_name: Schaper, M. last_name: Schaper citation: ama: 'Neuser M, Holtkamp P-K, Hoyer K-P, et al. Mechanical properties and joinability of the near-eutectic aluminium casting alloy AlSi12. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. 2025;239(4):801-815. doi:10.1177/14644207251319922' apa: 'Neuser, M., Holtkamp, P.-K., Hoyer, K.-P., Kappe, F., Yildiz, S., Bobbert, M., Meschut, G., & Schaper, M. (2025). Mechanical properties and joinability of the near-eutectic aluminium casting alloy AlSi12. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 239(4), 801–815. https://doi.org/10.1177/14644207251319922' bibtex: '@article{Neuser_Holtkamp_Hoyer_Kappe_Yildiz_Bobbert_Meschut_Schaper_2025, title={Mechanical properties and joinability of the near-eutectic aluminium casting alloy AlSi12}, volume={239}, DOI={10.1177/14644207251319922}, number={4}, journal={Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications}, publisher={SAGE Publications}, author={Neuser, M. and Holtkamp, P.-K. and Hoyer, K.-P. and Kappe, F. and Yildiz, S. and Bobbert, M. and Meschut, G. and Schaper, M.}, year={2025}, pages={801–815} }' chicago: 'Neuser, M., P.-K. Holtkamp, K.-P. Hoyer, F. Kappe, S. Yildiz, M. Bobbert, G. Meschut, and M. Schaper. “Mechanical Properties and Joinability of the Near-Eutectic Aluminium Casting Alloy AlSi12.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 239, no. 4 (2025): 801–15. https://doi.org/10.1177/14644207251319922.' ieee: 'M. Neuser et al., “Mechanical properties and joinability of the near-eutectic aluminium casting alloy AlSi12,” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, vol. 239, no. 4, pp. 801–815, 2025, doi: 10.1177/14644207251319922.' mla: 'Neuser, M., et al. “Mechanical Properties and Joinability of the Near-Eutectic Aluminium Casting Alloy AlSi12.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, vol. 239, no. 4, SAGE Publications, 2025, pp. 801–15, doi:10.1177/14644207251319922.' short: 'M. Neuser, P.-K. Holtkamp, K.-P. Hoyer, F. Kappe, S. Yildiz, M. Bobbert, G. Meschut, M. Schaper, Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 239 (2025) 801–815.' date_created: 2025-05-12T15:10:13Z date_updated: 2025-05-12T15:22:10Z doi: 10.1177/14644207251319922 intvolume: ' 239' issue: '4' language: - iso: eng page: 801-815 publication: 'Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications' publication_identifier: issn: - 1464-4207 - 2041-3076 publication_status: published publisher: SAGE Publications status: public title: Mechanical properties and joinability of the near-eutectic aluminium casting alloy AlSi12 type: journal_article user_id: '32340' volume: 239 year: '2025' ... --- _id: '60105' abstract: - lang: eng text: Lightweight design by using low-density and load-adapted materials can reduce the weight of vehicles and the emissions generated during operation. However, the usage of different materials requires innovative joining technologies with increased versatility. In this investigation, the focus is on describing and characterising the failure behaviour of connections manufactured by an innovative thermomechanical joining process with adaptable auxiliary joining elements in single-lap tensile-shear tests. In order to analyse the failure development in detail, the specimens are investigated using in-situ computed tomography (in-situ CT). Here, the tensile-shear test is interrupted at points of interest and CT scans are conducted under load. In addition, the interrupted in-situ testing procedure is validated by comparing the loading behaviour with conventional continuous tensile-shear tests. The results of the in-situ investigations of joints with varying material combinations clearly describe the cause of failure, allowing conclusions towards an improved joint design. author: - first_name: T full_name: Borgert, T last_name: Borgert - first_name: D full_name: Köhler, D last_name: Köhler - first_name: E. full_name: Wiens, E. last_name: Wiens - first_name: R full_name: Kupfer, R last_name: Kupfer - first_name: J full_name: Troschitz, J last_name: Troschitz - first_name: W full_name: Homberg, W last_name: Homberg - first_name: M full_name: Gude, M last_name: Gude citation: ama: 'Borgert T, Köhler D, Wiens E, et al. In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. 2024;238(12):2299-2306. doi:10.1177/14644207241232233' apa: 'Borgert, T., Köhler, D., Wiens, E., Kupfer, R., Troschitz, J., Homberg, W., & Gude, M. (2024). In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 238(12), 2299–2306. https://doi.org/10.1177/14644207241232233' bibtex: '@article{Borgert_Köhler_Wiens_Kupfer_Troschitz_Homberg_Gude_2024, title={In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element}, volume={238}, DOI={10.1177/14644207241232233}, number={12}, journal={Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications}, publisher={SAGE Publications}, author={Borgert, T and Köhler, D and Wiens, E. and Kupfer, R and Troschitz, J and Homberg, W and Gude, M}, year={2024}, pages={2299–2306} }' chicago: 'Borgert, T, D Köhler, E. Wiens, R Kupfer, J Troschitz, W Homberg, and M Gude. “In-Situ Computed Tomography Analysis of the Failure Mechanisms of Thermomechanically Manufactured Joints with Auxiliary Joining Element.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 238, no. 12 (2024): 2299–2306. https://doi.org/10.1177/14644207241232233.' ieee: 'T. Borgert et al., “In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element,” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, vol. 238, no. 12, pp. 2299–2306, 2024, doi: 10.1177/14644207241232233.' mla: 'Borgert, T., et al. “In-Situ Computed Tomography Analysis of the Failure Mechanisms of Thermomechanically Manufactured Joints with Auxiliary Joining Element.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, vol. 238, no. 12, SAGE Publications, 2024, pp. 2299–306, doi:10.1177/14644207241232233.' short: 'T. Borgert, D. Köhler, E. Wiens, R. Kupfer, J. Troschitz, W. Homberg, M. Gude, Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 238 (2024) 2299–2306.' date_created: 2025-06-02T20:01:39Z date_updated: 2025-06-02T20:18:42Z ddc: - '620' department: - _id: '157' - _id: '43' doi: 10.1177/14644207241232233 has_accepted_license: '1' intvolume: ' 238' issue: '12' language: - iso: eng page: 2299-2306 project: - _id: '130' grant_number: '418701707' name: 'TRR 285: TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' - _id: '133' name: 'TRR 285 - C: TRR 285 - Project Area C' - _id: '148' name: 'TRR 285 – C04: TRR 285 - Subproject C04' - _id: '147' name: 'TRR 285 – C03: TRR 285 - Subproject C03' publication: 'Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications' publication_identifier: issn: - 1464-4207 - 2041-3076 publication_status: published publisher: SAGE Publications status: public title: In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element type: journal_article user_id: '83408' volume: 238 year: '2024' ... --- _id: '62073' abstract: - lang: eng text: A numerical modelling strategy for the direct pin pressing process of metallic pins into continuous fibre-reinforced thermoplastic organosheets is developed. The joining process is performed above the thermoplast’s melting temperature, altering the initial material structure of the composite by fibre rearrangement, which in turn influences the load-bearing capacity of the joint. Therefore, the modelling strategy aims at predicting the resultant material structure after pin pressing. The modelling approach considers both the textile architecture and the process parameters (temperature, tool velocity). A sub-meso modelling framework for the fibres based on a multi-filament approach is used. The interaction between fibres and the thermoplastic melt, as well as the matrix flow, is modelled using the Arbitrary Lagrangian Eulerian method. This allows for the prediction of matrix-rich zones and fibre rearrangement around the pin. The promising results show a good agreement of the resultant material structure in terms of compaction and fibre volume content around the pressed pin. Characteristic parameters show an underestimation of the laminate thickness below the pin. Moreover, an evaluation method for evaluating the orientation changes of the virtual multi-filaments is developed and presented to observe and assess fibre rearrangement and fibre volume content in detail during the numerical process simulation. It can be seen that only fibres around the pin are displaced and not in the whole molten area. Furthermore, it can be observed in detail that the initial position of the fibres in relation to the pin determines whether the fibres are displaced in the in-plane or out-of-plane direction. author: - first_name: B. full_name: Gröger, B. last_name: Gröger - first_name: Johannes full_name: Gerritzen, Johannes id: '105344' last_name: Gerritzen orcid: 0000-0002-0169-8602 - first_name: A. full_name: Hornig, A. last_name: Hornig - first_name: M. full_name: Gude, M. last_name: Gude citation: ama: 'Gröger B, Gerritzen J, Hornig A, Gude M. Developing a numerical modelling strategy for metallic pin pressing processes in fibre reinforced thermoplastics to investigate fibre rearrangement mechanisms during joining. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. 2024;238(12):2286-2298. doi:10.1177/14644207241280035' apa: 'Gröger, B., Gerritzen, J., Hornig, A., & Gude, M. (2024). Developing a numerical modelling strategy for metallic pin pressing processes in fibre reinforced thermoplastics to investigate fibre rearrangement mechanisms during joining. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 238(12), 2286–2298. https://doi.org/10.1177/14644207241280035' bibtex: '@article{Gröger_Gerritzen_Hornig_Gude_2024, title={Developing a numerical modelling strategy for metallic pin pressing processes in fibre reinforced thermoplastics to investigate fibre rearrangement mechanisms during joining}, volume={238}, DOI={10.1177/14644207241280035}, number={12}, journal={Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications}, publisher={SAGE Publications}, author={Gröger, B. and Gerritzen, Johannes and Hornig, A. and Gude, M.}, year={2024}, pages={2286–2298} }' chicago: 'Gröger, B., Johannes Gerritzen, A. Hornig, and M. Gude. “Developing a Numerical Modelling Strategy for Metallic Pin Pressing Processes in Fibre Reinforced Thermoplastics to Investigate Fibre Rearrangement Mechanisms during Joining.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 238, no. 12 (2024): 2286–98. https://doi.org/10.1177/14644207241280035.' ieee: 'B. Gröger, J. Gerritzen, A. Hornig, and M. Gude, “Developing a numerical modelling strategy for metallic pin pressing processes in fibre reinforced thermoplastics to investigate fibre rearrangement mechanisms during joining,” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, vol. 238, no. 12, pp. 2286–2298, 2024, doi: 10.1177/14644207241280035.' mla: 'Gröger, B., et al. “Developing a Numerical Modelling Strategy for Metallic Pin Pressing Processes in Fibre Reinforced Thermoplastics to Investigate Fibre Rearrangement Mechanisms during Joining.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, vol. 238, no. 12, SAGE Publications, 2024, pp. 2286–98, doi:10.1177/14644207241280035.' short: 'B. Gröger, J. Gerritzen, A. Hornig, M. Gude, Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 238 (2024) 2286–2298.' date_created: 2025-11-04T12:34:11Z date_updated: 2026-02-27T06:45:59Z doi: 10.1177/14644207241280035 intvolume: ' 238' issue: '12' language: - iso: eng page: 2286-2298 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: 'Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications' publication_identifier: issn: - 1464-4207 - 2041-3076 publication_status: published publisher: SAGE Publications status: public title: Developing a numerical modelling strategy for metallic pin pressing processes in fibre reinforced thermoplastics to investigate fibre rearrangement mechanisms during joining type: journal_article user_id: '105344' volume: 238 year: '2024' ... --- _id: '63346' abstract: - lang: eng text: Lightweight design by using low-density and load-adapted materials can reduce the weight of vehicles and the emissions generated during operation. However, the usage of different materials requires innovative joining technologies with increased versatility. In this investigation, the focus is on describing and characterising the failure behaviour of connections manufactured by an innovative thermomechanical joining process with adaptable auxiliary joining elements in single-lap tensile-shear tests. In order to analyse the failure development in detail, the specimens are investigated using in-situ computed tomography (in-situ CT). Here, the tensile-shear test is interrupted at points of interest and CT scans are conducted under load. In addition, the interrupted in-situ testing procedure is validated by comparing the loading behaviour with conventional continuous tensile-shear tests. The results of the in-situ investigations of joints with varying material combinations clearly describe the cause of failure, allowing conclusions towards an improved joint design. author: - first_name: Thomas full_name: Borgert, Thomas id: '83141' last_name: Borgert - first_name: D full_name: Köhler, D last_name: Köhler - first_name: Eugen full_name: Wiens, Eugen id: '7888' last_name: Wiens - first_name: R full_name: Kupfer, R last_name: Kupfer - first_name: J full_name: Troschitz, J last_name: Troschitz - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: M full_name: Gude, M last_name: Gude citation: ama: 'Borgert T, Köhler D, Wiens E, et al. In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. 2024;238(12):2299-2306. doi:10.1177/14644207241232233' apa: 'Borgert, T., Köhler, D., Wiens, E., Kupfer, R., Troschitz, J., Homberg, W., & Gude, M. (2024). In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 238(12), 2299–2306. https://doi.org/10.1177/14644207241232233' bibtex: '@article{Borgert_Köhler_Wiens_Kupfer_Troschitz_Homberg_Gude_2024, title={In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element}, volume={238}, DOI={10.1177/14644207241232233}, number={12}, journal={Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications}, publisher={SAGE Publications}, author={Borgert, Thomas and Köhler, D and Wiens, Eugen and Kupfer, R and Troschitz, J and Homberg, Werner and Gude, M}, year={2024}, pages={2299–2306} }' chicago: 'Borgert, Thomas, D Köhler, Eugen Wiens, R Kupfer, J Troschitz, Werner Homberg, and M Gude. “In-Situ Computed Tomography Analysis of the Failure Mechanisms of Thermomechanically Manufactured Joints with Auxiliary Joining Element.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 238, no. 12 (2024): 2299–2306. https://doi.org/10.1177/14644207241232233.' ieee: 'T. Borgert et al., “In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element,” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, vol. 238, no. 12, pp. 2299–2306, 2024, doi: 10.1177/14644207241232233.' mla: 'Borgert, Thomas, et al. “In-Situ Computed Tomography Analysis of the Failure Mechanisms of Thermomechanically Manufactured Joints with Auxiliary Joining Element.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, vol. 238, no. 12, SAGE Publications, 2024, pp. 2299–306, doi:10.1177/14644207241232233.' short: 'T. Borgert, D. Köhler, E. Wiens, R. Kupfer, J. Troschitz, W. Homberg, M. Gude, Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 238 (2024) 2299–2306.' date_created: 2025-12-19T09:13:30Z date_updated: 2025-12-22T10:40:28Z department: - _id: '156' doi: 10.1177/14644207241232233 intvolume: ' 238' issue: '12' language: - iso: eng page: 2299-2306 publication: 'Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications' publication_identifier: issn: - 1464-4207 - 2041-3076 publication_status: published publisher: SAGE Publications quality_controlled: '1' status: public title: In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element type: journal_article user_id: '7888' volume: 238 year: '2024' ... --- _id: '42636' abstract: - lang: eng text: Laser additive manufacturing processes are used for the production of highly complex geometric structures due to their high geometric freedom. Additive manufacturing processes, in particular powder-based selective laser melting, are used to produce metallic additive manufactured components for the automotive and aerospace industries. Different materials are often joined together to realize sustainable lightweight construction. The production of such mixed construction joints is often realized using mechanical joining technology (e.g. self-piercing riveting). However, there is currently very little experience with the mechanical joining of metallic additive manufacturing components. Furthermore, there is insufficient knowledge about the effects that occur during the mechanical joining of additive manufacturing components. In this article, a method is presented to investigate the joinability of additively manufactured components with conventionally manufactured components using a numerical simulation of the self-piercing riveting process. For this purpose, the additive manufacturing materials are characterized experimentally, the simulation model is configured, and the joining process with additive manufacturing materials is represented in the numerical simulation. Furthermore, the influence of the building direction on the mechanical properties is shown using miniature tensile specimens. Besides the configuration of the simulation model, the influence of heat treatment on the self-piercing riveting process is presented. article_number: '146442072311582' author: - first_name: Per full_name: Heyser, Per id: '40450' last_name: Heyser - first_name: Rudolf full_name: Petker, Rudolf last_name: Petker - first_name: Gerson full_name: Meschut, Gerson id: '32056' last_name: Meschut orcid: 0000-0002-2763-1246 citation: ama: 'Heyser P, Petker R, Meschut G. Development of a numerical simulation model for self-piercing riveting of additive manufactured AlSi10Mg. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. Published online 2023. doi:10.1177/14644207231158213' apa: 'Heyser, P., Petker, R., & Meschut, G. (2023). Development of a numerical simulation model for self-piercing riveting of additive manufactured AlSi10Mg. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Article 146442072311582. https://doi.org/10.1177/14644207231158213' bibtex: '@article{Heyser_Petker_Meschut_2023, title={Development of a numerical simulation model for self-piercing riveting of additive manufactured AlSi10Mg}, DOI={10.1177/14644207231158213}, number={146442072311582}, journal={Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications}, publisher={SAGE Publications}, author={Heyser, Per and Petker, Rudolf and Meschut, Gerson}, year={2023} }' chicago: 'Heyser, Per, Rudolf Petker, and Gerson Meschut. “Development of a Numerical Simulation Model for Self-Piercing Riveting of Additive Manufactured AlSi10Mg.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 2023. https://doi.org/10.1177/14644207231158213.' ieee: 'P. Heyser, R. Petker, and G. Meschut, “Development of a numerical simulation model for self-piercing riveting of additive manufactured AlSi10Mg,” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Art. no. 146442072311582, 2023, doi: 10.1177/14644207231158213.' mla: 'Heyser, Per, et al. “Development of a Numerical Simulation Model for Self-Piercing Riveting of Additive Manufactured AlSi10Mg.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 146442072311582, SAGE Publications, 2023, doi:10.1177/14644207231158213.' short: 'P. Heyser, R. Petker, G. Meschut, Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications (2023).' date_created: 2023-02-28T10:52:49Z date_updated: 2023-02-28T10:55:03Z department: - _id: '157' doi: 10.1177/14644207231158213 keyword: - Mechanical Engineering - General Materials Science language: - iso: eng publication: 'Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications' publication_identifier: issn: - 1464-4207 - 2041-3076 publication_status: epub_ahead publisher: SAGE Publications quality_controlled: '1' status: public title: Development of a numerical simulation model for self-piercing riveting of additive manufactured AlSi10Mg type: journal_article user_id: '40450' year: '2023' ... --- _id: '30904' abstract: - lang: eng text: The process chain for the manufacturing of sheet metal components in mass production includes various cutting and forming operations, which influence the resulting properties of the parts and therefore subsequent manufacturing steps, such as clamping and joining. It is shown that clamping of the components leads to superimposed residual stresses and geometry changes. Therefore, the part properties differ from the initial state of the semifinished products, which has to be considered in the design of clinched joints. This paper presents an approach for coupled determination of the properties of semifinished and finished parts during deep drawing and clamping as well as their effects on the joint quality during clinching. One method for the effective and efficient determination of the properties of semifinished products and components during production is using process data from the preceding manufacturing processes, which is concretely presented in this work. In addition to the interconnection of the entire production chain, it is necessary to define relevant process data for each individual manufacturing step and to correlate the data with the material properties reliably. Therefore, the cross-process interactions of different steps of the process chain for the manufacturing of sheet metal components and the effect of process variations on subsequent manufacturing steps are investigated. Consequently, the boundary conditions for a mechanical joining process based on data from preceding process steps can be predicted. article_number: '146442072210775' article_type: review author: - first_name: Per full_name: Heyser, Per id: '40450' last_name: Heyser - first_name: S full_name: Wiesenmayer, S last_name: Wiesenmayer - first_name: P full_name: Frey, P last_name: Frey - first_name: T full_name: Nehls, T last_name: Nehls - first_name: C full_name: Scharr, C last_name: Scharr - first_name: W full_name: Flügge, W last_name: Flügge - first_name: M full_name: Merklein, M last_name: Merklein - first_name: Gerson full_name: Meschut, Gerson id: '32056' last_name: Meschut orcid: 0000-0002-2763-1246 citation: ama: 'Heyser P, Wiesenmayer S, Frey P, et al. Consideration of the manufacturing history of sheet metal components for the adaptation of a clinching process. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. Published online 2022. doi:10.1177/14644207221077560' apa: 'Heyser, P., Wiesenmayer, S., Frey, P., Nehls, T., Scharr, C., Flügge, W., Merklein, M., & Meschut, G. (2022). Consideration of the manufacturing history of sheet metal components for the adaptation of a clinching process. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Article 146442072210775. https://doi.org/10.1177/14644207221077560' bibtex: '@article{Heyser_Wiesenmayer_Frey_Nehls_Scharr_Flügge_Merklein_Meschut_2022, title={Consideration of the manufacturing history of sheet metal components for the adaptation of a clinching process}, DOI={10.1177/14644207221077560}, number={146442072210775}, journal={Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications}, publisher={SAGE Publications}, author={Heyser, Per and Wiesenmayer, S and Frey, P and Nehls, T and Scharr, C and Flügge, W and Merklein, M and Meschut, Gerson}, year={2022} }' chicago: 'Heyser, Per, S Wiesenmayer, P Frey, T Nehls, C Scharr, W Flügge, M Merklein, and Gerson Meschut. “Consideration of the Manufacturing History of Sheet Metal Components for the Adaptation of a Clinching Process.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 2022. https://doi.org/10.1177/14644207221077560.' ieee: 'P. Heyser et al., “Consideration of the manufacturing history of sheet metal components for the adaptation of a clinching process,” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Art. no. 146442072210775, 2022, doi: 10.1177/14644207221077560.' mla: 'Heyser, Per, et al. “Consideration of the Manufacturing History of Sheet Metal Components for the Adaptation of a Clinching Process.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 146442072210775, SAGE Publications, 2022, doi:10.1177/14644207221077560.' short: 'P. Heyser, S. Wiesenmayer, P. Frey, T. Nehls, C. Scharr, W. Flügge, M. Merklein, G. Meschut, Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications (2022).' date_created: 2022-04-14T12:05:59Z date_updated: 2022-04-25T20:01:18Z department: - _id: '157' doi: 10.1177/14644207221077560 keyword: - Mechanical Engineering - General Materials Science language: - iso: eng publication: 'Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications' publication_identifier: issn: - 1464-4207 - 2041-3076 publication_status: published publisher: SAGE Publications quality_controlled: '1' status: public title: Consideration of the manufacturing history of sheet metal components for the adaptation of a clinching process type: journal_article user_id: '40450' year: '2022' ... --- _id: '34219' abstract: - lang: eng text: Resource-saving and sustainable production is becoming increasingly important regarding social, political and economic aspects, thus making the use of lightweight-construction technologies a current trend. For this reason, multi-material-systems made of high-strength steel and aluminium as well as metal and fibre-reinforced plastics gain in importance. However, different material properties, e.g. stiffness, thermal expansion coefficients or chemical incompatibilities, are challenging for conventional joining technologies. Joining by cold formed pin structures has shown to have high potential for joining multi-material-systems. These pins can be joined either by direct pin pressing into an unperforated joining partner or by caulking, where the pins are inserted through a pre-punched joining partner and the pin head is upset, resulting in a form-fit joint. Usually, cylindrical pins are used for joining. However, non-rotationally symmetrical pin geometries offer the possibility of introducing a predetermined breaking point or reinforcing a connection in the principal force direction. In this work, cylindrical pins as well as non-rotationally symmetrical pin geometries, such as polygonal and oval pin structures, are cold extruded from the sheet metal plane of an HCT590X+Z dual phase steel and joined in the next step with an EN AW-6014 aluminium using direct pin pressing. Since the formation of an undercut has an crucial influence on the joint strength, the investigations will be focused on the resulting joint geometry. In addition, the effect of different pin heights will be examined to analyse the joint formation at different levels of compression of the pin structures. Finally, the joints are evaluated regarding their joint strength in tensile shear tests and cross tension tests. Here the flow resistance of the geometry used as well as the pin height and thus the strain hardening of the pin base during the extrusion of the pins play a decisive role for the shear strength. author: - first_name: David full_name: Römisch, David last_name: Römisch - first_name: Martin full_name: Kraus, Martin last_name: Kraus - first_name: Marion full_name: Merklein, Marion last_name: Merklein citation: ama: 'Römisch D, Kraus M, Merklein M. Investigation of the influence of formed, non-rotationally symmetrical pin geometries and their effect on the joint quality of steel and aluminium sheets by direct pin pressing. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. 2022;236(6):1187-1202. doi:10.1177/14644207221081408' apa: 'Römisch, D., Kraus, M., & Merklein, M. (2022). Investigation of the influence of formed, non-rotationally symmetrical pin geometries and their effect on the joint quality of steel and aluminium sheets by direct pin pressing. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 236(6), 1187–1202. https://doi.org/10.1177/14644207221081408' bibtex: '@article{Römisch_Kraus_Merklein_2022, title={Investigation of the influence of formed, non-rotationally symmetrical pin geometries and their effect on the joint quality of steel and aluminium sheets by direct pin pressing}, volume={236}, DOI={10.1177/14644207221081408}, number={6}, journal={Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications}, publisher={SAGE Publications}, author={Römisch, David and Kraus, Martin and Merklein, Marion}, year={2022}, pages={1187–1202} }' chicago: 'Römisch, David, Martin Kraus, and Marion Merklein. “Investigation of the Influence of Formed, Non-Rotationally Symmetrical Pin Geometries and Their Effect on the Joint Quality of Steel and Aluminium Sheets by Direct Pin Pressing.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 236, no. 6 (2022): 1187–1202. https://doi.org/10.1177/14644207221081408.' ieee: 'D. Römisch, M. Kraus, and M. Merklein, “Investigation of the influence of formed, non-rotationally symmetrical pin geometries and their effect on the joint quality of steel and aluminium sheets by direct pin pressing,” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, vol. 236, no. 6, pp. 1187–1202, 2022, doi: 10.1177/14644207221081408.' mla: 'Römisch, David, et al. “Investigation of the Influence of Formed, Non-Rotationally Symmetrical Pin Geometries and Their Effect on the Joint Quality of Steel and Aluminium Sheets by Direct Pin Pressing.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, vol. 236, no. 6, SAGE Publications, 2022, pp. 1187–202, doi:10.1177/14644207221081408.' short: 'D. Römisch, M. Kraus, M. Merklein, Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 236 (2022) 1187–1202.' date_created: 2022-12-05T21:39:38Z date_updated: 2022-12-05T21:41:09Z doi: 10.1177/14644207221081408 intvolume: ' 236' issue: '6' keyword: - Mechanical Engineering - General Materials Science language: - iso: eng page: 1187-1202 project: - _id: '130' grant_number: '418701707' name: 'TRR 285: TRR 285' - _id: '133' name: 'TRR 285 - C: TRR 285 - Project Area C' - _id: '145' name: 'TRR 285 – C01: TRR 285 - Subproject C01' publication: 'Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications' publication_identifier: issn: - 1464-4207 - 2041-3076 publication_status: published publisher: SAGE Publications status: public title: Investigation of the influence of formed, non-rotationally symmetrical pin geometries and their effect on the joint quality of steel and aluminium sheets by direct pin pressing type: journal_article user_id: '7850' volume: 236 year: '2022' ... --- _id: '29724' abstract: - lang: eng text: In many manufacturing areas, multi-material designs are implemented in which individual components are joined together to form complex structures with numerous joints. For example, in the automotive sector, cast components are used at the junctions of the body and joined with different types of sheet metal and extruded profiles. To be able to join structures consisting of different materials, alternative joining technologies have emerged in recent years. This includes clinching, which allows assembling of two or more thin sheet metal and casting parts by solely cold forming the material. Clinching the brittle and usually less ductile cast aluminium alloys remains a challenge because the brittle character of the cast aluminium alloys can cause cracks during the forming of the clinched joint. In this study, the influence of the heat treatment time of an aluminium casting alloy AlSi9 on the joinability in the clinching process is investigated. Specific heat treatment of the naturally hard AlSi9 leads to a modification of the eutectic microstructure, which can increase ductility. Based on this, it will be examined if specific clinching die geometries can be used, which achieve an optimized geometrical formation of the clinched joint. The load-bearing capacities of the clinched joints are determined and compared by shear tensile and head tensile tests. Furthermore, the joints are examined microscopically to investigate the influence of the heat treatment on the failure behaviour during the load-bearing tests as well as crack initiation within the joining process. article_number: '146442072210758' author: - first_name: Moritz full_name: Neuser, Moritz id: '32340' last_name: Neuser - first_name: Max full_name: Böhnke, Max id: '45779' last_name: Böhnke - first_name: Olexandr full_name: Grydin, Olexandr id: '43822' last_name: Grydin - first_name: Mathias full_name: Bobbert, Mathias id: '7850' last_name: Bobbert - first_name: Mirko full_name: Schaper, Mirko id: '43720' last_name: Schaper - first_name: Gerson full_name: Meschut, Gerson id: '32056' last_name: Meschut orcid: 0000-0002-2763-1246 citation: ama: 'Neuser M, Böhnke M, Grydin O, Bobbert M, Schaper M, Meschut G. Influence of heat treatment on the suitability for clinching of the aluminium casting alloy AlSi9. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. Published online 2022. doi:10.1177/14644207221075838' apa: 'Neuser, M., Böhnke, M., Grydin, O., Bobbert, M., Schaper, M., & Meschut, G. (2022). Influence of heat treatment on the suitability for clinching of the aluminium casting alloy AlSi9. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Article 146442072210758. https://doi.org/10.1177/14644207221075838' bibtex: '@article{Neuser_Böhnke_Grydin_Bobbert_Schaper_Meschut_2022, title={Influence of heat treatment on the suitability for clinching of the aluminium casting alloy AlSi9}, DOI={10.1177/14644207221075838}, number={146442072210758}, journal={Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications}, publisher={SAGE Publications}, author={Neuser, Moritz and Böhnke, Max and Grydin, Olexandr and Bobbert, Mathias and Schaper, Mirko and Meschut, Gerson}, year={2022} }' chicago: 'Neuser, Moritz, Max Böhnke, Olexandr Grydin, Mathias Bobbert, Mirko Schaper, and Gerson Meschut. “Influence of Heat Treatment on the Suitability for Clinching of the Aluminium Casting Alloy AlSi9.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 2022. https://doi.org/10.1177/14644207221075838.' ieee: 'M. Neuser, M. Böhnke, O. Grydin, M. Bobbert, M. Schaper, and G. Meschut, “Influence of heat treatment on the suitability for clinching of the aluminium casting alloy AlSi9,” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Art. no. 146442072210758, 2022, doi: 10.1177/14644207221075838.' mla: 'Neuser, Moritz, et al. “Influence of Heat Treatment on the Suitability for Clinching of the Aluminium Casting Alloy AlSi9.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 146442072210758, SAGE Publications, 2022, doi:10.1177/14644207221075838.' short: 'M. Neuser, M. Böhnke, O. Grydin, M. Bobbert, M. Schaper, G. Meschut, Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications (2022).' date_created: 2022-02-02T09:05:45Z date_updated: 2024-03-14T15:20:44Z department: - _id: '630' - _id: '158' - _id: '157' doi: 10.1177/14644207221075838 keyword: - Mechanical Engineering - General Materials Science language: - iso: eng project: - _id: '130' grant_number: '418701707' name: 'TRR 285: TRR 285' - _id: '131' name: 'TRR 285 - A: TRR 285 - Project Area A' - _id: '136' name: 'TRR 285 – A02: TRR 285 - Subproject A02' - _id: '131' name: 'TRR 285 - A: TRR 285 - Project Area A' - _id: '135' name: 'TRR 285 – A01: TRR 285 - Subproject A01' publication: 'Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications' publication_identifier: issn: - 1464-4207 - 2041-3076 publication_status: published publisher: SAGE Publications quality_controlled: '1' status: public title: Influence of heat treatment on the suitability for clinching of the aluminium casting alloy AlSi9 type: journal_article user_id: '32340' year: '2022' ... --- _id: '43158' abstract: - lang: eng text: In view of economic and ecological trends, the concepts for lightweight construction in transport systems are becoming increasingly important. These are frequently applied in the form of multi-material systems, which are characterized by the selective use of materials and geometries. One major challenge in the manufacturing of multi-material systems is the joining of the individual components to form a complete system. Mechanical joining processes such as semi-tubular self-piercing riveting are frequently used for this application but reach their limits concerning the number of combinations of geometry and material. In order to react to the requirements and to increase the versatility of semi-tubular self-pierce riveting, a process combination consisting of a tumbling process and a self-pierce riveting process has been presented previously. This process combination is used in this work to investigate the versatility and to identify the influencing parameters on it. For this purpose, experiments are conducted to identify process-side influence possibilities. The tests are performed with a dual-phase steel aluminum alloy to represent the varying mechanical characteristics of multi-material systems. Furthermore, the initial sheet thicknesses of the joining partners are varied in several steps. In addition to the geometric joint formation used to describe the undercut, the rivet head end position and the residual sheet thickness, the joining process, is also analyzed during the investigations. Further, the innovative joining process is evaluated by comparing it with a conventional self-piercing riveting process. The knowledge obtained represents a basis for the identification and evaluation of the versatility of the process combination. article_number: '146442072211354' author: - first_name: Simon full_name: Wituschek, Simon last_name: Wituschek - first_name: Fabian full_name: Kappe, Fabian last_name: Kappe - first_name: Gerson full_name: Meschut, Gerson last_name: Meschut - first_name: Michael full_name: Lechner, Michael last_name: Lechner citation: ama: 'Wituschek S, Kappe F, Meschut G, Lechner M. Geometric and mechanical joint characterization of conventionally  and tumbled self-piercing riveting joints. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. Published online 2022. doi:10.1177/14644207221135400' apa: 'Wituschek, S., Kappe, F., Meschut, G., & Lechner, M. (2022). Geometric and mechanical joint characterization of conventionally  and tumbled self-piercing riveting joints. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Article 146442072211354. https://doi.org/10.1177/14644207221135400' bibtex: '@article{Wituschek_Kappe_Meschut_Lechner_2022, title={Geometric and mechanical joint characterization of conventionally  and tumbled self-piercing riveting joints}, DOI={10.1177/14644207221135400}, number={146442072211354}, journal={Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications}, publisher={SAGE Publications}, author={Wituschek, Simon and Kappe, Fabian and Meschut, Gerson and Lechner, Michael}, year={2022} }' chicago: 'Wituschek, Simon, Fabian Kappe, Gerson Meschut, and Michael Lechner. “Geometric and Mechanical Joint Characterization of Conventionally  and Tumbled Self-Piercing Riveting Joints.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 2022. https://doi.org/10.1177/14644207221135400.' ieee: 'S. Wituschek, F. Kappe, G. Meschut, and M. Lechner, “Geometric and mechanical joint characterization of conventionally  and tumbled self-piercing riveting joints,” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Art. no. 146442072211354, 2022, doi: 10.1177/14644207221135400.' mla: 'Wituschek, Simon, et al. “Geometric and Mechanical Joint Characterization of Conventionally  and Tumbled Self-Piercing Riveting Joints.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 146442072211354, SAGE Publications, 2022, doi:10.1177/14644207221135400.' short: 'S. Wituschek, F. Kappe, G. Meschut, M. Lechner, Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications (2022).' date_created: 2023-03-29T08:36:26Z date_updated: 2023-03-29T08:36:59Z department: - _id: '157' doi: 10.1177/14644207221135400 keyword: - Mechanical Engineering - General Materials Science language: - iso: eng publication: 'Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications' publication_identifier: issn: - 1464-4207 - 2041-3076 publication_status: published publisher: SAGE Publications status: public title: Geometric and mechanical joint characterization of conventionally and tumbled self-piercing riveting joints type: journal_article user_id: '53912' year: '2022' ... --- _id: '34243' abstract: - lang: eng text: In view of economic and ecological trends, the concepts for lightweight construction in transport systems are becoming increasingly important. These are frequently applied in the form of multi-material systems, which are characterized by the selective use of materials and geometries. One major challenge in the manufacturing of multi-material systems is the joining of the individual components to form a complete system. Mechanical joining processes such as semi-tubular self-piercing riveting are frequently used for this application but reach their limits concerning the number of combinations of geometry and material. In order to react to the requirements and to increase the versatility of semi-tubular self-pierce riveting, a process combination consisting of a tumbling process and a self-pierce riveting process has been presented previously. This process combination is used in this work to investigate the versatility and to identify the influencing parameters on it. For this purpose, experiments are conducted to identify process-side influence possibilities. The tests are performed with a dual-phase steel aluminum alloy to represent the varying mechanical characteristics of multi-material systems. Furthermore, the initial sheet thicknesses of the joining partners are varied in several steps. In addition to the geometric joint formation used to describe the undercut, the rivet head end position and the residual sheet thickness, the joining process, is also analyzed during the investigations. Further, the innovative joining process is evaluated by comparing it with a conventional self-piercing riveting process. The knowledge obtained represents a basis for the identification and evaluation of the versatility of the process combination. article_number: '146442072211354' author: - first_name: Simon full_name: Wituschek, Simon last_name: Wituschek - first_name: Fabian full_name: Kappe, Fabian last_name: Kappe - first_name: Gerson full_name: Meschut, Gerson last_name: Meschut - first_name: Michael full_name: Lechner, Michael last_name: Lechner citation: ama: 'Wituschek S, Kappe F, Meschut G, Lechner M. Geometric and mechanical joint characterization of conventionally  and tumbled self-piercing riveting joints. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. Published online 2022. doi:10.1177/14644207221135400' apa: 'Wituschek, S., Kappe, F., Meschut, G., & Lechner, M. (2022). Geometric and mechanical joint characterization of conventionally  and tumbled self-piercing riveting joints. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Article 146442072211354. https://doi.org/10.1177/14644207221135400' bibtex: '@article{Wituschek_Kappe_Meschut_Lechner_2022, title={Geometric and mechanical joint characterization of conventionally  and tumbled self-piercing riveting joints}, DOI={10.1177/14644207221135400}, number={146442072211354}, journal={Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications}, publisher={SAGE Publications}, author={Wituschek, Simon and Kappe, Fabian and Meschut, Gerson and Lechner, Michael}, year={2022} }' chicago: 'Wituschek, Simon, Fabian Kappe, Gerson Meschut, and Michael Lechner. “Geometric and Mechanical Joint Characterization of Conventionally  and Tumbled Self-Piercing Riveting Joints.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 2022. https://doi.org/10.1177/14644207221135400.' ieee: 'S. Wituschek, F. Kappe, G. Meschut, and M. Lechner, “Geometric and mechanical joint characterization of conventionally  and tumbled self-piercing riveting joints,” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Art. no. 146442072211354, 2022, doi: 10.1177/14644207221135400.' mla: 'Wituschek, Simon, et al. “Geometric and Mechanical Joint Characterization of Conventionally  and Tumbled Self-Piercing Riveting Joints.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 146442072211354, SAGE Publications, 2022, doi:10.1177/14644207221135400.' short: 'S. Wituschek, F. Kappe, G. Meschut, M. Lechner, Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications (2022).' date_created: 2022-12-06T13:51:01Z date_updated: 2023-04-27T08:54:47Z doi: 10.1177/14644207221135400 keyword: - Mechanical Engineering - General Materials Science language: - iso: eng project: - _id: '130' grant_number: '418701707' name: 'TRR 285: TRR 285' - _id: '133' name: 'TRR 285 - C: TRR 285 - Project Area C' - _id: '146' name: 'TRR 285 – C02: TRR 285 - Subproject C02' publication: 'Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications' publication_identifier: issn: - 1464-4207 - 2041-3076 publication_status: published publisher: SAGE Publications quality_controlled: '1' status: public title: Geometric and mechanical joint characterization of conventionally and tumbled self-piercing riveting joints type: journal_article user_id: '66459' year: '2022' ... --- _id: '30736' abstract: - lang: eng text: In this study, an innovative friction model is used to improve the quality of clinching process simulations. Consequently, the future over dimensioning can be reduced. Furthermore, the improved prediction quality of the joining process simulation leads to an improvement in the simulation of load-bearing capacity as well. In this way, the entire sampling process can be performed virtually without any experimental investigations. This will contribute to the advancement of lightweight construction in the automotive industry. In this work, the frictional behavior is studied in dependence on the local joining process parameters. As a reference for the numerical investigations, clinch joints by means of a die with fixed geometry are joined. Additionally, a hardness mapping is performed on the microsection of the clinch joints. It shows the local strain hardening, which correlates with the forming degree in the simulation. Based on the occurring contacts and the local joining process parameters in the joining process simulation, the test matrix for the experimental friction tests is defined. The friction tests are carried out on a compression-torsion-tribometer. This type of tribometer is able to apply high interface pressures above the initial yield stress due to the specimen encapsulation. Besides, the pure joining part contact, the contact between the joining part and joining tool can be tested as well. The experimental test setup offers the possibility to evaluate the influences of temperature, relative velocity, interface pressure, and frictional stroke independently. Based on the results of the experimental friction tests, a friction model is created. The resulting friction model is integrated into the numerical joining process simulation via a subroutine. To validate the quality of the new friction modeling, the results of simulations are compared with the experiments in terms of load-stroke diagrams, joint geometry, and hardness mappings on the microsection. article_number: '146442072210742' author: - first_name: Moritz Sebastian full_name: Rossel, Moritz Sebastian id: '44503' last_name: Rossel - first_name: Gerson full_name: Meschut, Gerson id: '32056' last_name: Meschut orcid: 0000-0002-2763-1246 citation: ama: 'Rossel MS, Meschut G. Increasing the accuracy of clinching process simulations by modeling the friction as a function of local joining process parameters. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. Published online 2022. doi:10.1177/14644207221074290' apa: 'Rossel, M. S., & Meschut, G. (2022). Increasing the accuracy of clinching process simulations by modeling the friction as a function of local joining process parameters. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Article 146442072210742. https://doi.org/10.1177/14644207221074290' bibtex: '@article{Rossel_Meschut_2022, title={Increasing the accuracy of clinching process simulations by modeling the friction as a function of local joining process parameters}, DOI={10.1177/14644207221074290}, number={146442072210742}, journal={Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications}, publisher={SAGE Publications}, author={Rossel, Moritz Sebastian and Meschut, Gerson}, year={2022} }' chicago: 'Rossel, Moritz Sebastian, and Gerson Meschut. “Increasing the Accuracy of Clinching Process Simulations by Modeling the Friction as a Function of Local Joining Process Parameters.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 2022. https://doi.org/10.1177/14644207221074290.' ieee: 'M. S. Rossel and G. Meschut, “Increasing the accuracy of clinching process simulations by modeling the friction as a function of local joining process parameters,” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Art. no. 146442072210742, 2022, doi: 10.1177/14644207221074290.' mla: 'Rossel, Moritz Sebastian, and Gerson Meschut. “Increasing the Accuracy of Clinching Process Simulations by Modeling the Friction as a Function of Local Joining Process Parameters.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 146442072210742, SAGE Publications, 2022, doi:10.1177/14644207221074290.' short: 'M.S. Rossel, G. Meschut, Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications (2022).' date_created: 2022-04-04T10:10:49Z date_updated: 2023-04-28T09:13:12Z department: - _id: '157' doi: 10.1177/14644207221074290 keyword: - Mechanical Engineering - General Materials Science language: - iso: eng publication: 'Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications' publication_identifier: issn: - 1464-4207 - 2041-3076 publication_status: published publisher: SAGE Publications quality_controlled: '1' status: public title: Increasing the accuracy of clinching process simulations by modeling the friction as a function of local joining process parameters type: journal_article user_id: '23175' year: '2022' ... --- _id: '30962' abstract: - lang: eng text: Clinching as a mechanical joining process has become established in many areas of car body. In order to predict relevant properties of clinched joints and to ensure the reliability of the process, it is numerically simulated during the product development process. The prediction accuracy of the simulated process depends on the implemented friction model. Therefore, a new method for determining friction coefficients in sheet metal materials was developed and tested. The aim of this study is the numerical investigation of this experimental method by means of FE simulation. The experimental setup is modelled in a 3D numerical simulation taking into account the process parameters varying in the experiment, such as geometric properties, contact pressure and contact velocity. Furthermore, the contact description of the model is calibrated via the experimentally determined friction coefficients according to clinch-relevant parameter space. It is shown that the assumptions made in the determination of the experimental data in preliminary work are valid. In addition, it is investigated to what extent the standard Coulomb friction model in the FEM can reproduce the results of the experimental method. article_number: '146442072210934' author: - 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: 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: 'Bielak CR, Böhnke M, Bobbert M, Meschut G. Numerical investigation of a friction  test to determine the friction  coefficients for the clinching process. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. Published online 2022. doi:10.1177/14644207221093468' apa: 'Bielak, C. R., Böhnke, M., Bobbert, M., & Meschut, G. (2022). Numerical investigation of a friction  test to determine the friction  coefficients for the clinching process. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Article 146442072210934. https://doi.org/10.1177/14644207221093468' bibtex: '@article{Bielak_Böhnke_Bobbert_Meschut_2022, title={Numerical investigation of a friction  test to determine the friction  coefficients for the clinching process}, DOI={10.1177/14644207221093468}, number={146442072210934}, journal={Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications}, publisher={SAGE Publications}, author={Bielak, Christian Roman and Böhnke, Max and Bobbert, Mathias and Meschut, Gerson}, year={2022} }' chicago: 'Bielak, Christian Roman, Max Böhnke, Mathias Bobbert, and Gerson Meschut. “Numerical Investigation of a Friction  Test to Determine the Friction  Coefficients for the Clinching Process.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 2022. https://doi.org/10.1177/14644207221093468.' ieee: 'C. R. Bielak, M. Böhnke, M. Bobbert, and G. Meschut, “Numerical investigation of a friction  test to determine the friction  coefficients for the clinching process,” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Art. no. 146442072210934, 2022, doi: 10.1177/14644207221093468.' mla: 'Bielak, Christian Roman, et al. “Numerical Investigation of a Friction  Test to Determine the Friction  Coefficients for the Clinching Process.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 146442072210934, SAGE Publications, 2022, doi:10.1177/14644207221093468.' short: 'C.R. Bielak, M. Böhnke, M. Bobbert, G. Meschut, Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications (2022).' date_created: 2022-04-27T08:58:11Z date_updated: 2023-04-28T11:31:35Z department: - _id: '157' - _id: '630' doi: 10.1177/14644207221093468 keyword: - Mechanical Engineering - General Materials Science language: - iso: eng project: - _id: '130' grant_number: '418701707' name: 'TRR 285: TRR 285' - _id: '131' name: 'TRR 285 - A: TRR 285 - Project Area A' - _id: '135' name: 'TRR 285 – A01: TRR 285 - Subproject A01' publication: 'Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications' publication_identifier: issn: - 1464-4207 - 2041-3076 publication_status: published publisher: SAGE Publications quality_controlled: '1' status: public title: Numerical investigation of a friction test to determine the friction coefficients for the clinching process type: journal_article user_id: '34782' year: '2022' ... --- _id: '30847' abstract: - lang: eng text: Mechanical joining technologies like self-piercing riveting are gaining importance with regard to environmental protection, as they enable multi-material design and lightweight construction. A new approach is the use of high nitrogen steel as rivet material, which allows to omit the usually necessary heat treatment and coating and thus leads to a shortening of the process chain. Due to the high strain hardening, however, high tool loads must be expected. Thus, appropriate forming strategies are needed. Within this contribution, the influence of applying different temperatures for each forming stage in a two-stage rivet forming process using the high nitrogen steel 1.3815 is investigated. The findings provide a basic understanding of the influence of the temperature management when forming high nitrogen steel. For this purpose, the rivets are not formed at the same temperature in each stage, but an elevated temperature is applied selectively. Different process routes are investigated. First, cups are manufactured in stage 1 at room temperature, followed by stage 2 at 200°C. Second, cups are formed in stage 1 at 200°C and used for stage 2 at room temperature. By comparing the findings with results when applying the same temperature in both stages, it is shown that the temperature during the first forming operation has an effect on the forming behaviour during the second forming stage. The required forming forces and the resulting rivet hardness can be influenced by process-adapted temperature application. Furthermore, the causes for the temperature impact on the residual cup thickness in stage 1 are evaluated by a cause and effect analysis, which provides a deeper process understanding. The thermal expansion of the tool and the billet as well as the improved forming behaviour at 200°C are identified as the main influencing causes on the achieved residual cup thickness. author: - first_name: Clara-Maria full_name: Kuball, Clara-Maria last_name: Kuball - first_name: Benedikt full_name: Uhe, Benedikt id: '38131' last_name: Uhe - first_name: Gerson full_name: Meschut, Gerson id: '32056' last_name: Meschut orcid: 0000-0002-2763-1246 - first_name: Marion full_name: Merklein, Marion last_name: Merklein citation: ama: Kuball C-M, Uhe B, Meschut G, Merklein M. Process-adapted temperature application within a two-stage rivet forming process for high nitrogen steel. Proceedings of the Institution of Mechanical Engineers Part L-Journal of Materials-Design and Applications. Published online 2022:1-17. doi:10.1177/14644207211068693 apa: Kuball, C.-M., Uhe, B., Meschut, G., & Merklein, M. (2022). Process-adapted temperature application within a two-stage rivet forming process for high nitrogen steel. Proceedings of the Institution of Mechanical Engineers Part L-Journal of Materials-Design and Applications, 1–17. https://doi.org/10.1177/14644207211068693 bibtex: '@article{Kuball_Uhe_Meschut_Merklein_2022, title={Process-adapted temperature application within a two-stage rivet forming process for high nitrogen steel}, DOI={10.1177/14644207211068693}, journal={Proceedings of the Institution of Mechanical Engineers Part L-Journal of Materials-Design and Applications}, author={Kuball, Clara-Maria and Uhe, Benedikt and Meschut, Gerson and Merklein, Marion}, year={2022}, pages={1–17} }' chicago: Kuball, Clara-Maria, Benedikt Uhe, Gerson Meschut, and Marion Merklein. “Process-Adapted Temperature Application within a Two-Stage Rivet Forming Process for High Nitrogen Steel.” Proceedings of the Institution of Mechanical Engineers Part L-Journal of Materials-Design and Applications, 2022, 1–17. https://doi.org/10.1177/14644207211068693. ieee: 'C.-M. Kuball, B. Uhe, G. Meschut, and M. Merklein, “Process-adapted temperature application within a two-stage rivet forming process for high nitrogen steel,” Proceedings of the Institution of Mechanical Engineers Part L-Journal of Materials-Design and Applications, pp. 1–17, 2022, doi: 10.1177/14644207211068693.' mla: Kuball, Clara-Maria, et al. “Process-Adapted Temperature Application within a Two-Stage Rivet Forming Process for High Nitrogen Steel.” Proceedings of the Institution of Mechanical Engineers Part L-Journal of Materials-Design and Applications, 2022, pp. 1–17, doi:10.1177/14644207211068693. short: C.-M. Kuball, B. Uhe, G. Meschut, M. Merklein, Proceedings of the Institution of Mechanical Engineers Part L-Journal of Materials-Design and Applications (2022) 1–17. date_created: 2022-04-07T06:52:04Z date_updated: 2026-02-27T10:21:22Z department: - _id: '157' doi: 10.1177/14644207211068693 language: - iso: eng page: 1-17 publication: Proceedings of the Institution of Mechanical Engineers Part L-Journal of Materials-Design and Applications publication_identifier: issn: - 1464-4207 publication_status: published quality_controlled: '1' status: public title: Process-adapted temperature application within a two-stage rivet forming process for high nitrogen steel type: journal_article user_id: '53912' year: '2022' ...