--- _id: '30696' author: - first_name: C. full_name: Zirngibl, C. last_name: Zirngibl - first_name: B. full_name: Schleich, B. last_name: Schleich - first_name: S. full_name: Wartzack, S. last_name: Wartzack citation: ama: Zirngibl C, Schleich B, Wartzack S. Approach for the automated and data-based design of mechanical joints. Proceedings of the Design Society. 2021;1:521. doi:10.1017/pds.2021.52 apa: Zirngibl, C., Schleich, B., & Wartzack, S. (2021). Approach for the automated and data-based design of mechanical joints. Proceedings of the Design Society, 1, 521. https://doi.org/10.1017/pds.2021.52 bibtex: '@article{Zirngibl_Schleich_Wartzack_2021, title={Approach for the automated and data-based design of mechanical joints}, volume={1}, DOI={10.1017/pds.2021.52}, journal={Proceedings of the Design Society}, author={Zirngibl, C. and Schleich, B. and Wartzack, S.}, year={2021}, pages={521} }' chicago: 'Zirngibl, C., B. Schleich, and S. Wartzack. “Approach for the Automated and Data-Based Design of Mechanical Joints.” Proceedings of the Design Society 1 (2021): 521. https://doi.org/10.1017/pds.2021.52.' ieee: 'C. Zirngibl, B. Schleich, and S. Wartzack, “Approach for the automated and data-based design of mechanical joints,” Proceedings of the Design Society, vol. 1, p. 521, 2021, doi: 10.1017/pds.2021.52.' mla: Zirngibl, C., et al. “Approach for the Automated and Data-Based Design of Mechanical Joints.” Proceedings of the Design Society, vol. 1, 2021, p. 521, doi:10.1017/pds.2021.52. short: C. Zirngibl, B. Schleich, S. Wartzack, Proceedings of the Design Society 1 (2021) 521. date_created: 2022-03-29T09:12:58Z date_updated: 2023-01-02T11:19:35Z department: - _id: '630' doi: 10.1017/pds.2021.52 intvolume: ' 1' language: - iso: eng page: '521' project: - _id: '130' grant_number: '418701707' name: 'TRR 285: TRR 285' - _id: '132' name: 'TRR 285 - B: TRR 285 - Project Area B' - _id: '144' name: 'TRR 285 – B05: TRR 285 - Subproject B05' publication: Proceedings of the Design Society status: public title: Approach for the automated and data-based design of mechanical joints type: journal_article user_id: '14931' volume: 1 year: '2021' ... --- _id: '30700' author: - first_name: C. full_name: Zirngibl, C. last_name: Zirngibl - first_name: F. full_name: Dworschak, F. last_name: Dworschak - first_name: B. full_name: Schleich, B. last_name: Schleich - first_name: S. full_name: Wartzack, S. last_name: Wartzack citation: ama: Zirngibl C, Dworschak F, Schleich B, Wartzack S. Application of reinforcement learning for the optimization of clinch joint characteristics. Production Engineering. Published online 2021. doi:10.1007/s11740-021-01098-4 apa: Zirngibl, C., Dworschak, F., Schleich, B., & Wartzack, S. (2021). Application of reinforcement learning for the optimization of clinch joint characteristics. Production Engineering. https://doi.org/10.1007/s11740-021-01098-4 bibtex: '@article{Zirngibl_Dworschak_Schleich_Wartzack_2021, title={Application of reinforcement learning for the optimization of clinch joint characteristics}, DOI={10.1007/s11740-021-01098-4}, journal={Production Engineering}, author={Zirngibl, C. and Dworschak, F. and Schleich, B. and Wartzack, S.}, year={2021} }' chicago: Zirngibl, C., F. Dworschak, B. Schleich, and S. Wartzack. “Application of Reinforcement Learning for the Optimization of Clinch Joint Characteristics.” Production Engineering, 2021. https://doi.org/10.1007/s11740-021-01098-4. ieee: 'C. Zirngibl, F. Dworschak, B. Schleich, and S. Wartzack, “Application of reinforcement learning for the optimization of clinch joint characteristics,” Production Engineering, 2021, doi: 10.1007/s11740-021-01098-4.' mla: Zirngibl, C., et al. “Application of Reinforcement Learning for the Optimization of Clinch Joint Characteristics.” Production Engineering, 2021, doi:10.1007/s11740-021-01098-4. short: C. Zirngibl, F. Dworschak, B. Schleich, S. Wartzack, Production Engineering (2021). date_created: 2022-03-29T09:19:07Z date_updated: 2023-01-02T11:19:55Z department: - _id: '630' doi: 10.1007/s11740-021-01098-4 language: - iso: eng project: - _id: '130' grant_number: '418701707' name: 'TRR 285: TRR 285' - _id: '132' name: 'TRR 285 - B: TRR 285 - Project Area B' - _id: '144' name: 'TRR 285 – B05: TRR 285 - Subproject B05' publication: Production Engineering status: public title: Application of reinforcement learning for the optimization of clinch joint characteristics type: journal_article user_id: '14931' year: '2021' ... --- _id: '30701' author: - first_name: D. full_name: Römisch, D. last_name: Römisch - first_name: J. full_name: Popp, J. last_name: Popp - first_name: D. full_name: Drummer, D. last_name: Drummer - first_name: M. full_name: Merklein, M. last_name: Merklein citation: ama: Römisch D, Popp J, Drummer D, Merklein M. Joining of CFRT-steel hybrid parts via hole-forming and subsequent pin caulking. Production Engineering. Published online 2021. doi:10.1007/s11740-021-01093-9 apa: Römisch, D., Popp, J., Drummer, D., & Merklein, M. (2021). Joining of CFRT-steel hybrid parts via hole-forming and subsequent pin caulking. Production Engineering. https://doi.org/10.1007/s11740-021-01093-9 bibtex: '@article{Römisch_Popp_Drummer_Merklein_2021, title={Joining of CFRT-steel hybrid parts via hole-forming and subsequent pin caulking}, DOI={10.1007/s11740-021-01093-9}, journal={Production Engineering}, author={Römisch, D. and Popp, J. and Drummer, D. and Merklein, M.}, year={2021} }' chicago: Römisch, D., J. Popp, D. Drummer, and M. Merklein. “Joining of CFRT-Steel Hybrid Parts via Hole-Forming and Subsequent Pin Caulking.” Production Engineering, 2021. https://doi.org/10.1007/s11740-021-01093-9. ieee: 'D. Römisch, J. Popp, D. Drummer, and M. Merklein, “Joining of CFRT-steel hybrid parts via hole-forming and subsequent pin caulking,” Production Engineering, 2021, doi: 10.1007/s11740-021-01093-9.' mla: Römisch, D., et al. “Joining of CFRT-Steel Hybrid Parts via Hole-Forming and Subsequent Pin Caulking.” Production Engineering, 2021, doi:10.1007/s11740-021-01093-9. short: D. Römisch, J. Popp, D. Drummer, M. Merklein, Production Engineering (2021). date_created: 2022-03-29T09:21:36Z date_updated: 2023-01-02T11:20:14Z department: - _id: '630' doi: 10.1007/s11740-021-01093-9 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: '145' name: 'TRR 285 – C01: TRR 285 - Subproject C01' publication: Production Engineering status: public title: Joining of CFRT-steel hybrid parts via hole-forming and subsequent pin caulking type: journal_article user_id: '14931' year: '2021' ... --- _id: '30697' author: - first_name: R. full_name: Lafarge, R. last_name: Lafarge - first_name: A. full_name: Wolf, A. last_name: Wolf - first_name: C. full_name: Guilleaume, C. last_name: Guilleaume - first_name: A. full_name: Brosius, A. last_name: Brosius citation: ama: Lafarge R, Wolf A, Guilleaume C, Brosius A. A New Non-destructive Testing Method Applied to Clinching. Minerals, Metals and Materials Series. Published online 2021:1461. doi:10.1007/978-3-030-75381-8_121 apa: Lafarge, R., Wolf, A., Guilleaume, C., & Brosius, A. (2021). A New Non-destructive Testing Method Applied to Clinching. Minerals, Metals and Materials Series, 1461. https://doi.org/10.1007/978-3-030-75381-8_121 bibtex: '@article{Lafarge_Wolf_Guilleaume_Brosius_2021, title={A New Non-destructive Testing Method Applied to Clinching}, DOI={10.1007/978-3-030-75381-8_121}, journal={Minerals, Metals and Materials Series}, author={Lafarge, R. and Wolf, A. and Guilleaume, C. and Brosius, A.}, year={2021}, pages={1461} }' chicago: Lafarge, R., A. Wolf, C. Guilleaume, and A. Brosius. “A New Non-Destructive Testing Method Applied to Clinching.” Minerals, Metals and Materials Series, 2021, 1461. https://doi.org/10.1007/978-3-030-75381-8_121. ieee: 'R. Lafarge, A. Wolf, C. Guilleaume, and A. Brosius, “A New Non-destructive Testing Method Applied to Clinching,” Minerals, Metals and Materials Series, p. 1461, 2021, doi: 10.1007/978-3-030-75381-8_121.' mla: Lafarge, R., et al. “A New Non-Destructive Testing Method Applied to Clinching.” Minerals, Metals and Materials Series, 2021, p. 1461, doi:10.1007/978-3-030-75381-8_121. short: R. Lafarge, A. Wolf, C. Guilleaume, A. Brosius, Minerals, Metals and Materials Series (2021) 1461. date_created: 2022-03-29T09:14:12Z date_updated: 2023-01-02T11:20:45Z department: - _id: '630' doi: 10.1007/978-3-030-75381-8_121 language: - iso: eng page: '1461' project: - _id: '130' grant_number: '418701707' name: 'TRR 285: TRR 285' - _id: '133' name: 'TRR 285 - C: TRR 285 - Project Area C' - _id: '148' name: 'TRR 285 – C04: TRR 285 - Subproject C04' publication: Minerals, Metals and Materials Series status: public title: A New Non-destructive Testing Method Applied to Clinching type: journal_article user_id: '14931' year: '2021' ... --- _id: '30684' abstract: - lang: eng text: Due to stricter emission targets in the mobility sector and the resulting trend towards lightweight construction in order to reduce weight and consequently emissions, multi-material systems that allow a material to be placed in the right quantity and in the right place are becoming increasingly important. One major challenge that is holding back the rapid and widespread use of multi-material systems is the lack of adequate joining processes that are suitable for joining dissimilar materials. Joining processes without auxiliary elements have the advantage of a reduced assembly effort and no additional added weight. Conventional joining processes without auxiliary elements, such as welding, clinching, or the use of adhesives, reach their limits due to different mechanical properties and chemical incompatibilities. A process with potential in the field of joining dissimilar materials is joining without an auxiliary element using pin structures. However, current pin manufacturing processes are mostly time-consuming or can only be integrated barely into existing industrial manufacturing processes due to their specific properties. For this reason, the present work investigates the production of single- and multi-pin structures from high-strength dual-phase steel HCT590X + Z (DP600, t0 = 1.5 mm) by cold extrusion directly out of the sheet metal. These structures are subsequently joined with an aluminium sheet (EN AW-6014-T4, t0 = 1.5 mm) by direct pin pressing. For a quantitative evaluation of the joint quality, tensile shear tests are carried out and the influence of different pin heights, pin number, and pin arrangements, as well as different joining strategies on the joint strength is experimentally evaluated. It is proven that a single pin structure with a diameter of 1.5 mm and an average height of 1.86 mm achieves a maximum tensile shear force of 1025 N. The results reveal that the formation of a form-fit during direct pin pressing is essential for the joint strength. By increasing the number of pins, a linear increase in force could be demonstrated, which is independent of the arrangement of the pin structures. author: - first_name: D. full_name: Römisch, D. last_name: Römisch - first_name: M. full_name: Kraus, M. last_name: Kraus - first_name: M. full_name: Merklein, M. last_name: Merklein citation: ama: Römisch D, Kraus M, Merklein M. Experimental study on joining by forming of hct590x + z and en-aw 6014 sheets using cold extruded pin structures. Journal of Manufacturing and Materials Processing. 2021;5:25. doi:10.3390/jmmp5010025 apa: Römisch, D., Kraus, M., & Merklein, M. (2021). Experimental study on joining by forming of hct590x + z and en-aw 6014 sheets using cold extruded pin structures. Journal of Manufacturing and Materials Processing, 5, 25. https://doi.org/10.3390/jmmp5010025 bibtex: '@article{Römisch_Kraus_Merklein_2021, title={Experimental study on joining by forming of hct590x + z and en-aw 6014 sheets using cold extruded pin structures}, volume={5}, DOI={10.3390/jmmp5010025}, journal={Journal of Manufacturing and Materials Processing}, author={Römisch, D. and Kraus, M. and Merklein, M.}, year={2021}, pages={25} }' chicago: 'Römisch, D., M. Kraus, and M. Merklein. “Experimental Study on Joining by Forming of Hct590x + z and En-Aw 6014 Sheets Using Cold Extruded Pin Structures.” Journal of Manufacturing and Materials Processing 5 (2021): 25. https://doi.org/10.3390/jmmp5010025.' ieee: 'D. Römisch, M. Kraus, and M. Merklein, “Experimental study on joining by forming of hct590x + z and en-aw 6014 sheets using cold extruded pin structures,” Journal of Manufacturing and Materials Processing, vol. 5, p. 25, 2021, doi: 10.3390/jmmp5010025.' mla: Römisch, D., et al. “Experimental Study on Joining by Forming of Hct590x + z and En-Aw 6014 Sheets Using Cold Extruded Pin Structures.” Journal of Manufacturing and Materials Processing, vol. 5, 2021, p. 25, doi:10.3390/jmmp5010025. short: D. Römisch, M. Kraus, M. Merklein, Journal of Manufacturing and Materials Processing 5 (2021) 25. date_created: 2022-03-29T08:48:14Z date_updated: 2023-01-02T11:47:27Z department: - _id: '630' doi: 10.3390/jmmp5010025 intvolume: ' 5' language: - iso: eng page: '25' 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: Journal of Manufacturing and Materials Processing status: public title: Experimental study on joining by forming of hct590x + z and en-aw 6014 sheets using cold extruded pin structures type: journal_article user_id: '14931' volume: 5 year: '2021' ... --- _id: '30682' abstract: - lang: eng text: 'Lightweight constructions become more and more important, especially in the mobility sector. In this industry, the increasingly strict regulations regarding the emissions of carbon dioxide can be achieved to a certain extent by reducing the vehicle weight. Thus, multi-material systems are used. Conventional joining techniques reach their limits when joining different materials due to different thermal expansion, unequal stiffness or chemical incompatibilities. This is why additional joining elements or adhesives are used. These must be viewed critically regarding a lightweight and resource-efficient production, since they add weight or complicate the recycling process of these components. Consequently, there is a great and growing need for new versatile joining technologies in order to overcome these challenges and to be able to react to changing process parameters and boundary conditions. Joining without an auxiliary element using pin structures formed directly from the sheet metal plane is one approach to meet these challenges. These pin structures are then joined by direct pressing into the joining partner. This is possible with a variety of material combinations, but is advantageous with regard to continuous fibre-reinforced thermoplastic composites (CFRTP), as the fibres do not have to be cut when joining CFRTP using pin structures. In this paper, the formability of pin structures made of a dual-phase steel DP600 (HCT590X + Z) is investigated. The extruded pin structures are joined by direct pin pressing with an EN AW-6014 to form tensile shear specimens. Different joining strategies are investigated to compare their influence on the joint strength. The results have shown that it is feasible to form suitable pins from a DP600 dual-phase steel to produce reliable connections with an aluminium sheet joined by direct pin pressing. ' author: - first_name: D. full_name: Römisch, D. last_name: Römisch - first_name: M. full_name: Kraus, M. last_name: Kraus - first_name: M. full_name: Merklein, M. last_name: Merklein citation: ama: Römisch D, Kraus M, Merklein M. Investigation of Different Joining by Forming Strategies when Connecting Different Metals without Auxiliary Elements. Key Engineering Materials. 2021;883:19-26. doi:10.4028/www.scientific.net/kem.883.19 apa: Römisch, D., Kraus, M., & Merklein, M. (2021). Investigation of Different Joining by Forming Strategies when Connecting Different Metals without Auxiliary Elements. Key Engineering Materials, 883, 19–26. https://doi.org/10.4028/www.scientific.net/kem.883.19 bibtex: '@article{Römisch_Kraus_Merklein_2021, title={Investigation of Different Joining by Forming Strategies when Connecting Different Metals without Auxiliary Elements}, volume={883}, DOI={10.4028/www.scientific.net/kem.883.19}, journal={Key Engineering Materials}, author={Römisch, D. and Kraus, M. and Merklein, M.}, year={2021}, pages={19–26} }' chicago: 'Römisch, D., M. Kraus, and M. Merklein. “Investigation of Different Joining by Forming Strategies When Connecting Different Metals without Auxiliary Elements.” Key Engineering Materials 883 (2021): 19–26. https://doi.org/10.4028/www.scientific.net/kem.883.19.' ieee: 'D. Römisch, M. Kraus, and M. Merklein, “Investigation of Different Joining by Forming Strategies when Connecting Different Metals without Auxiliary Elements,” Key Engineering Materials, vol. 883, pp. 19–26, 2021, doi: 10.4028/www.scientific.net/kem.883.19.' mla: Römisch, D., et al. “Investigation of Different Joining by Forming Strategies When Connecting Different Metals without Auxiliary Elements.” Key Engineering Materials, vol. 883, 2021, pp. 19–26, doi:10.4028/www.scientific.net/kem.883.19. short: D. Römisch, M. Kraus, M. Merklein, Key Engineering Materials 883 (2021) 19–26. date_created: 2022-03-29T08:45:16Z date_updated: 2023-01-02T11:47:47Z department: - _id: '630' doi: 10.4028/www.scientific.net/kem.883.19 intvolume: ' 883' language: - iso: eng page: 19-26 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: Key Engineering Materials status: public title: Investigation of Different Joining by Forming Strategies when Connecting Different Metals without Auxiliary Elements type: journal_article user_id: '14931' volume: 883 year: '2021' ... --- _id: '30718' abstract: - lang: eng text: The growing demands of resource-saving processes and products are leading to increasing importance of lightweight construction for the automotive industry. One approach is multi-material design, which uses high-strength steels and aluminium alloys in the production of vehicle bodies. Therefore, reliable processes for joining components with different mechanical properties and geometries are necessary. As conventional joining processes reach their limits, new versatile processes and methods are required which can adapt to different process conditions and disturbance variables. A widely used joining process to join different materials is self-piercing riveting as a joining by forming method, however it is characterised as inflexible to changing process conditions due to a linear process kinematic and rigid dies. An approach to extend the process limits is the application of a tumbling kinematic for the punch. Thus, an adapted tumbling strategy can be used to influence the joining process and to achieve a controlled material flow in order to manufacture tailored joints. For the fundamental investigation of the process, numerical investigations are necessary. In order to achieve high model quality a precise material modelling is crucial. Therefore, a characterisation of the materials HCT590X+Z and EN AW-6014 as typical materials of multi-material mixes and the rivet material 38B2 is performed. Due to the different stress conditions during tumbling self-piercing riveting suitable characterisation methods are selected and carried out. author: - first_name: S. full_name: Wituschek, S. last_name: Wituschek - first_name: M. full_name: Lechner, M. last_name: Lechner citation: ama: Wituschek S, Lechner M. Material characterisation methods for a tumbling self-piercing riveting process. ESAFORM 2021. Published online 2021. doi:10.25518/esaform21.398 apa: Wituschek, S., & Lechner, M. (2021). Material characterisation methods for a tumbling self-piercing riveting process. ESAFORM 2021. https://doi.org/10.25518/esaform21.398 bibtex: '@article{Wituschek_Lechner_2021, title={Material characterisation methods for a tumbling self-piercing riveting process}, DOI={10.25518/esaform21.398}, journal={ESAFORM 2021}, author={Wituschek, S. and Lechner, M.}, year={2021} }' chicago: Wituschek, S., and M. Lechner. “Material Characterisation Methods for a Tumbling Self-Piercing Riveting Process.” ESAFORM 2021, 2021. https://doi.org/10.25518/esaform21.398. ieee: 'S. Wituschek and M. Lechner, “Material characterisation methods for a tumbling self-piercing riveting process,” ESAFORM 2021, 2021, doi: 10.25518/esaform21.398.' mla: Wituschek, S., and M. Lechner. “Material Characterisation Methods for a Tumbling Self-Piercing Riveting Process.” ESAFORM 2021, 2021, doi:10.25518/esaform21.398. short: S. Wituschek, M. Lechner, ESAFORM 2021 (2021). date_created: 2022-03-29T10:34:25Z date_updated: 2023-01-02T11:47:03Z department: - _id: '630' doi: 10.25518/esaform21.398 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: ESAFORM 2021 status: public title: Material characterisation methods for a tumbling self-piercing riveting process type: journal_article user_id: '14931' year: '2021' ... --- _id: '30683' abstract: - lang: eng text: 'When joining lightweight parts of various materials, clinching is a cost efficient solution. In a production line, the quality of a clinch point is primarily controlled by measurement of dimensions, which are accessible from outside. However, methods such as visual testing and measuring the bottom thickness as well as the outer diameter are not able to deliver any information about the most significant geometrical characteristic of the clinch point, neck thickness and undercut. Furthermore, ex-situ destructive methods such as microsectioning cannot detect elastic deformations and cracks that close after unloading. In order to exceed the current limits, a new non-destructive in-situ testing method for the clinching process is necessary. This work proposes a concept to characterize clinch points in-situ by combining two complementary non-destructive methods, namely, computed tomography (CT) and ultrasonic testing. Firstly, clinch points with different geometrical characteristics are analysed experimentally using ex-situ CT to get a highly spatially resolved 3D-image of the object. In this context, highly X-ray attenuating materials enhancing the visibility of the sheet-sheet interface are investigated. Secondly, the test specimens are modelled using finite element method (FEM) and a transient dynamic analysis (TDA) is conducted to study the effect of the geometrical differences on the deformation energy and to qualify the TDA as a fast in-situ non-destructive method for characterizing clinch points at high temporal resolution. ' author: - first_name: D. full_name: Köhler, D. last_name: Köhler - first_name: B. full_name: Sadeghian, B. last_name: Sadeghian - first_name: R. full_name: Kupfer, R. last_name: Kupfer - first_name: J. full_name: Troschitz, J. last_name: Troschitz - first_name: M. full_name: Gude, M. last_name: Gude - first_name: A. full_name: Brosius, A. last_name: Brosius citation: ama: Köhler D, Sadeghian B, Kupfer R, Troschitz J, Gude M, Brosius A. A Method for Characterization of Geometric Deviations in Clinch Points with Computed Tomography and Transient Dynamic Analysis. Key Engineering Materials. 2021;883:89-96. doi:10.4028/www.scientific.net/kem.883.89 apa: Köhler, D., Sadeghian, B., Kupfer, R., Troschitz, J., Gude, M., & Brosius, A. (2021). A Method for Characterization of Geometric Deviations in Clinch Points with Computed Tomography and Transient Dynamic Analysis. Key Engineering Materials, 883, 89–96. https://doi.org/10.4028/www.scientific.net/kem.883.89 bibtex: '@article{Köhler_Sadeghian_Kupfer_Troschitz_Gude_Brosius_2021, title={A Method for Characterization of Geometric Deviations in Clinch Points with Computed Tomography and Transient Dynamic Analysis}, volume={883}, DOI={10.4028/www.scientific.net/kem.883.89}, journal={Key Engineering Materials}, author={Köhler, D. and Sadeghian, B. and Kupfer, R. and Troschitz, J. and Gude, M. and Brosius, A.}, year={2021}, pages={89–96} }' chicago: 'Köhler, D., B. Sadeghian, R. Kupfer, J. Troschitz, M. Gude, and A. Brosius. “A Method for Characterization of Geometric Deviations in Clinch Points with Computed Tomography and Transient Dynamic Analysis.” Key Engineering Materials 883 (2021): 89–96. https://doi.org/10.4028/www.scientific.net/kem.883.89.' ieee: 'D. Köhler, B. Sadeghian, R. Kupfer, J. Troschitz, M. Gude, and A. Brosius, “A Method for Characterization of Geometric Deviations in Clinch Points with Computed Tomography and Transient Dynamic Analysis,” Key Engineering Materials, vol. 883, pp. 89–96, 2021, doi: 10.4028/www.scientific.net/kem.883.89.' mla: Köhler, D., et al. “A Method for Characterization of Geometric Deviations in Clinch Points with Computed Tomography and Transient Dynamic Analysis.” Key Engineering Materials, vol. 883, 2021, pp. 89–96, doi:10.4028/www.scientific.net/kem.883.89. short: D. Köhler, B. Sadeghian, R. Kupfer, J. Troschitz, M. Gude, A. Brosius, Key Engineering Materials 883 (2021) 89–96. date_created: 2022-03-29T08:46:40Z date_updated: 2023-01-02T11:48:16Z department: - _id: '630' doi: 10.4028/www.scientific.net/kem.883.89 intvolume: ' 883' language: - iso: eng page: 89-96 project: - _id: '130' grant_number: '418701707' name: 'TRR 285: TRR 285' - _id: '133' name: 'TRR 285 - C: TRR 285 - Project Area C' - _id: '148' name: 'TRR 285 – C04: TRR 285 - Subproject C04' publication: Key Engineering Materials status: public title: A Method for Characterization of Geometric Deviations in Clinch Points with Computed Tomography and Transient Dynamic Analysis type: journal_article user_id: '14931' volume: 883 year: '2021' ... --- _id: '30663' abstract: - lang: eng text: 'The use of clinch joints, e.g. vehicle structures, is determined by the reliability of the joint and its strength properties - in particular the fatigue strength. Clinch connections offer the advantage over form-closure and force-closure processes that they can also be used for hybrid material combinations. In order to be able to evaluate the influence of the geometry parameters such as e.g. undercut, neck thickness or also base thickness on the fatigue behavior, three clinch connections (in optimum and compromise design) with different tool parameters were designed and examined using the example of a joining task with aluminum sheet material. For this purpose, fatigue curves (F-N curves) in the range of high to very high numbers of load cycles (N = 105 to 107) were determined. In this load cycle range, a so-called "neck fracture" is mainly to be expected as the type of failure, whereas for quasi-static tests, a “buckling” is more likely to occur. The tests were carried out on single-cut overlapping shear tensile specimens. Metallographic and scanning electron microscopic examinations of the joints and the fracture surfaces served to identify the crack initiation site and to clarify the respective type of failure. Significant differences in the damage behaviour of the three clinching variants could be shown. This observation enables one step into the direction of fully understanding the relationship along the causal chain "joint requirements - joining process - fatigue strength". Thus the adaptability of the clinching process can be improved. ' author: - first_name: L. full_name: Ewenz, L. last_name: Ewenz - first_name: J. full_name: Kalich, J. last_name: Kalich - first_name: M. full_name: Zimmermann, M. last_name: Zimmermann - first_name: U. full_name: Füssel, U. last_name: Füssel citation: ama: Ewenz L, Kalich J, Zimmermann M, Füssel U. Effect of Different Tool Geometries on the Mechanical Properties of Al-Al Clinch Joints. Key Engineering Materials. 2021;883:65-72. doi:10.4028/www.scientific.net/kem.883.65 apa: Ewenz, L., Kalich, J., Zimmermann, M., & Füssel, U. (2021). Effect of Different Tool Geometries on the Mechanical Properties of Al-Al Clinch Joints. Key Engineering Materials, 883, 65–72. https://doi.org/10.4028/www.scientific.net/kem.883.65 bibtex: '@article{Ewenz_Kalich_Zimmermann_Füssel_2021, title={Effect of Different Tool Geometries on the Mechanical Properties of Al-Al Clinch Joints}, volume={883}, DOI={10.4028/www.scientific.net/kem.883.65}, journal={Key Engineering Materials}, author={Ewenz, L. and Kalich, J. and Zimmermann, M. and Füssel, U.}, year={2021}, pages={65–72} }' chicago: 'Ewenz, L., J. Kalich, M. Zimmermann, and U. Füssel. “Effect of Different Tool Geometries on the Mechanical Properties of Al-Al Clinch Joints.” Key Engineering Materials 883 (2021): 65–72. https://doi.org/10.4028/www.scientific.net/kem.883.65.' ieee: 'L. Ewenz, J. Kalich, M. Zimmermann, and U. Füssel, “Effect of Different Tool Geometries on the Mechanical Properties of Al-Al Clinch Joints,” Key Engineering Materials, vol. 883, pp. 65–72, 2021, doi: 10.4028/www.scientific.net/kem.883.65.' mla: Ewenz, L., et al. “Effect of Different Tool Geometries on the Mechanical Properties of Al-Al Clinch Joints.” Key Engineering Materials, vol. 883, 2021, pp. 65–72, doi:10.4028/www.scientific.net/kem.883.65. short: L. Ewenz, J. Kalich, M. Zimmermann, U. Füssel, Key Engineering Materials 883 (2021) 65–72. date_created: 2022-03-28T14:00:19Z date_updated: 2023-01-02T11:49:08Z department: - _id: '630' doi: 10.4028/www.scientific.net/kem.883.65 intvolume: ' 883' language: - iso: eng page: 65-72 project: - _id: '130' grant_number: '418701707' name: 'TRR 285: TRR 285' - _id: '132' name: 'TRR 285 - B: TRR 285 - Project Area B' - _id: '141' name: 'TRR 285 – B02: TRR 285 - Subproject B02' - _id: '138' name: 'TRR 285 – A04: TRR 285 - Subproject A04' - _id: '131' name: 'TRR 285 - A: TRR 285 - Project Area A' publication: Key Engineering Materials status: public title: Effect of Different Tool Geometries on the Mechanical Properties of Al-Al Clinch Joints type: journal_article user_id: '14931' volume: 883 year: '2021' ... --- _id: '30688' abstract: - lang: eng text: 'Thermally supported clinching (Hotclinch) is a novel promising process to join dissimilar materials. Here, metal and fibre-reinforced thermoplastics (FRTP) are used within this single step joining process and without the usage of auxiliary parts like screws or rivets. For this purpose, heat is applied to improve the formability of the reinforced thermoplastic. This enables joining of the materials using conventional clinching-tools. Focus of this work is the modelling on mesoscopic scale for the numerical simulation of this process. The FTRP-model takes the material behaviour both of matrix and the fabric reinforced organo-sheet under process temperatures into account. For describing the experimentally observed phenomena such as large deformations, fibre failure and the interactions between matrix and fibres as well as between fibres themselves, the usage of conventional, purely Lagrangian based FEM methods is limited. Therefore, the combination of contact-models with advanced modelling approaches like Arbitrary-Lagrangian-Eulerian (ALE), Coupled-Eulerian-Lagrangian (CEL) and Smooth-ParticleHydrodynamics (SPH) for the numerical simulation of the clinching process are employed. The different approaches are compared with regard to simulation feasibility, robustness and results accuracy. It is shown, that the CEL approach represents the most promising approach to describe the clinching process. ' author: - first_name: B. full_name: Gröger, B. last_name: Gröger - first_name: A. full_name: Hornig, A. last_name: Hornig - first_name: A. full_name: Hoog, A. last_name: Hoog - first_name: M. full_name: Gude, M. last_name: Gude citation: ama: 'Gröger B, Hornig A, Hoog A, Gude M. Modelling of thermally supported clinching of fibre-reinforced thermoplastics: Approaches on mesoscale considering large deformations and fibre failure. ESAFORM 2021 - 24th International Conference on Material Forming. Published online 2021. doi:10.25518/esaform21.4293' apa: 'Gröger, B., Hornig, A., Hoog, A., & Gude, M. (2021). Modelling of thermally supported clinching of fibre-reinforced thermoplastics: Approaches on mesoscale considering large deformations and fibre failure. ESAFORM 2021 - 24th International Conference on Material Forming. https://doi.org/10.25518/esaform21.4293' bibtex: '@article{Gröger_Hornig_Hoog_Gude_2021, title={Modelling of thermally supported clinching of fibre-reinforced thermoplastics: Approaches on mesoscale considering large deformations and fibre failure}, DOI={10.25518/esaform21.4293}, journal={ESAFORM 2021 - 24th International Conference on Material Forming}, author={Gröger, B. and Hornig, A. and Hoog, A. and Gude, M.}, year={2021} }' chicago: 'Gröger, B., A. Hornig, A. Hoog, and M. Gude. “Modelling of Thermally Supported Clinching of Fibre-Reinforced Thermoplastics: Approaches on Mesoscale Considering Large Deformations and Fibre Failure.” ESAFORM 2021 - 24th International Conference on Material Forming, 2021. https://doi.org/10.25518/esaform21.4293.' ieee: 'B. Gröger, A. Hornig, A. Hoog, and M. Gude, “Modelling of thermally supported clinching of fibre-reinforced thermoplastics: Approaches on mesoscale considering large deformations and fibre failure,” ESAFORM 2021 - 24th International Conference on Material Forming, 2021, doi: 10.25518/esaform21.4293.' mla: 'Gröger, B., et al. “Modelling of Thermally Supported Clinching of Fibre-Reinforced Thermoplastics: Approaches on Mesoscale Considering Large Deformations and Fibre Failure.” ESAFORM 2021 - 24th International Conference on Material Forming, 2021, doi:10.25518/esaform21.4293.' short: B. Gröger, A. Hornig, A. Hoog, M. Gude, ESAFORM 2021 - 24th International Conference on Material Forming (2021). date_created: 2022-03-29T08:52:57Z date_updated: 2023-01-02T11:50:35Z department: - _id: '630' doi: 10.25518/esaform21.4293 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: '137' name: 'TRR 285 – A03: TRR 285 - Subproject A03' publication: ESAFORM 2021 - 24th International Conference on Material Forming status: public title: 'Modelling of thermally supported clinching of fibre-reinforced thermoplastics: Approaches on mesoscale considering large deformations and fibre failure' type: journal_article user_id: '14931' year: '2021' ...