[{"abstract":[{"lang":"eng","text":"The mechanical joining of continuous fiber-reinforced thermoplastics (cFRTP) and metal sheets represents a promising approach for manufacturing hybrid lightweight structures. To reduce the time and cost associated with extensive experimental investigations, numerical modeling strategies are increasingly applied. In this numerical study, a further step in the modelling strategy for the direct pin-pressing (DPP) process of cFRTP and metal sheets is presented. The study focuses on modeling and simulating the occurring deformation mechanisms of decomposition, compaction, and separation of individual rovings on the mesoscale to analyze the resulting material structure. For this purpose, two simplified models were derived. The textile architecture is represented based on micrographs of cross-sections and discretized using the finite element method. The deformation of individual rovings during joining leads to a deformation of their initial elliptical cross section. To capture this level of resolution, both a cohesive zone and a pure contact approach are applied within the rovings. The highly viscous thermoplastic melt is modeled as a fluid employing the Arbitrary Lagrange–Eulerian (ALE) method. Matrix and roving meshes are coupled to account for fluid–structure interaction (FSI) during process. The study shows that coupling of matrix and rovings is necessary to obtain more accurate predictions of the deformation behaviour. Furthermore, the cohesive zone approach is better suited to simulate the emerging deformation mechanisms."}],"publication":"Key Engineering Materials","type":"journal_article","date_created":"2026-05-07T15:07:34Z","intvolume":" 1050","publication_status":"published","date_updated":"2026-05-07T15:10:16Z","publication_identifier":{"issn":["1662-9795"]},"author":[{"last_name":"Gröger","first_name":"Benjamin","full_name":"Gröger, Benjamin"},{"full_name":"Gerritzen, Johannes","orcid":"0000-0002-0169-8602","last_name":"Gerritzen","first_name":"Johannes","id":"105344"},{"full_name":"Hornig, Andreas","first_name":"Andreas","last_name":"Hornig"},{"full_name":"Gude, Maik","first_name":"Maik","last_name":"Gude"}],"year":"2026","title":"Modelling Deformation Mechanisms Decomposition, Separation and Compaction in Mechanical Joining Processes of Fiber Reinforced Thermoplastics on Meso Scale","doi":"10.4028/p-e8wywr","language":[{"iso":"eng"}],"project":[{"name":"TRR 285 - Subproject A03","_id":"137"},{"name":"TRR 285 - Project Area A","_id":"131"},{"_id":"130","name":"TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten"}],"citation":{"ama":"Gröger B, Gerritzen J, Hornig A, Gude M. Modelling Deformation Mechanisms Decomposition, Separation and Compaction in Mechanical Joining Processes of Fiber Reinforced Thermoplastics on Meso Scale. Key Engineering Materials. 2026;1050:227-234. doi:10.4028/p-e8wywr","bibtex":"@article{Gröger_Gerritzen_Hornig_Gude_2026, title={Modelling Deformation Mechanisms Decomposition, Separation and Compaction in Mechanical Joining Processes of Fiber Reinforced Thermoplastics on Meso Scale}, volume={1050}, DOI={10.4028/p-e8wywr}, journal={Key Engineering Materials}, publisher={Trans Tech Publications, Ltd.}, author={Gröger, Benjamin and Gerritzen, Johannes and Hornig, Andreas and Gude, Maik}, year={2026}, pages={227–234} }","mla":"Gröger, Benjamin, et al. “Modelling Deformation Mechanisms Decomposition, Separation and Compaction in Mechanical Joining Processes of Fiber Reinforced Thermoplastics on Meso Scale.” Key Engineering Materials, vol. 1050, Trans Tech Publications, Ltd., 2026, pp. 227–34, doi:10.4028/p-e8wywr.","chicago":"Gröger, Benjamin, Johannes Gerritzen, Andreas Hornig, and Maik Gude. “Modelling Deformation Mechanisms Decomposition, Separation and Compaction in Mechanical Joining Processes of Fiber Reinforced Thermoplastics on Meso Scale.” Key Engineering Materials 1050 (2026): 227–34. https://doi.org/10.4028/p-e8wywr.","short":"B. Gröger, J. Gerritzen, A. Hornig, M. Gude, Key Engineering Materials 1050 (2026) 227–234.","apa":"Gröger, B., Gerritzen, J., Hornig, A., & Gude, M. (2026). Modelling Deformation Mechanisms Decomposition, Separation and Compaction in Mechanical Joining Processes of Fiber Reinforced Thermoplastics on Meso Scale. Key Engineering Materials, 1050, 227–234. https://doi.org/10.4028/p-e8wywr","ieee":"B. Gröger, J. Gerritzen, A. Hornig, and M. Gude, “Modelling Deformation Mechanisms Decomposition, Separation and Compaction in Mechanical Joining Processes of Fiber Reinforced Thermoplastics on Meso Scale,” Key Engineering Materials, vol. 1050, pp. 227–234, 2026, doi: 10.4028/p-e8wywr."},"status":"public","volume":1050,"user_id":"105344","_id":"65582","publisher":"Trans Tech Publications, Ltd.","page":"227-234"},{"intvolume":" 1051","publication_status":"published","date_updated":"2026-06-04T12:32:31Z","publication_identifier":{"issn":["1662-9795"]},"author":[{"last_name":"Gabsa","first_name":"Steffen","full_name":"Gabsa, Steffen"},{"full_name":"Homberg, Werner","first_name":"Werner","last_name":"Homberg"}],"year":"2026","status":"public","title":"Material Transition by Friction Induced and Continuous Solid-State Recycling of Aluminum Scrap","volume":1051,"user_id":"106786","doi":"10.4028/p-nn14jh","_id":"65704","publisher":"Trans Tech Publications, Ltd.","page":"147-154","abstract":[{"lang":"eng","text":"The utilisation of friction-induced solid-state recycling, methodically adapted to the CoNform process, facilitates the continuous production of semi-finished products. The material intended for recycling is conveyed continuously via a rotating wheel. The volume flow is influenced by fixed surfaces, deflections, and constrictions, thereby creating an asymmetrical flow profile. In order to effect a change in the mechanical properties of the semi-finished product, the material fed into the process can be modified. This enables the amalgamation of two alloys or the direct transition between them. The inhomogeneous flow conditions present within the tool give rise to the mixing of materials, thereby creating a graded multi-material zone. The multi-material zone was divided into different areas and traced back to the process conditions. Within the transitions, the connections between the alloys were examined, as well as the influence on the boundary layer. Material properties were determined for the individual areas and located along the length of the profile."}],"citation":{"bibtex":"@article{Gabsa_Homberg_2026, title={Material Transition by Friction Induced and Continuous Solid-State Recycling of Aluminum Scrap}, volume={1051}, DOI={10.4028/p-nn14jh}, journal={Key Engineering Materials}, publisher={Trans Tech Publications, Ltd.}, author={Gabsa, Steffen and Homberg, Werner}, year={2026}, pages={147–154} }","ama":"Gabsa S, Homberg W. Material Transition by Friction Induced and Continuous Solid-State Recycling of Aluminum Scrap. Key Engineering Materials. 2026;1051:147-154. doi:10.4028/p-nn14jh","mla":"Gabsa, Steffen, and Werner Homberg. “Material Transition by Friction Induced and Continuous Solid-State Recycling of Aluminum Scrap.” Key Engineering Materials, vol. 1051, Trans Tech Publications, Ltd., 2026, pp. 147–54, doi:10.4028/p-nn14jh.","short":"S. Gabsa, W. Homberg, Key Engineering Materials 1051 (2026) 147–154.","chicago":"Gabsa, Steffen, and Werner Homberg. “Material Transition by Friction Induced and Continuous Solid-State Recycling of Aluminum Scrap.” Key Engineering Materials 1051 (2026): 147–54. https://doi.org/10.4028/p-nn14jh.","ieee":"S. Gabsa and W. Homberg, “Material Transition by Friction Induced and Continuous Solid-State Recycling of Aluminum Scrap,” Key Engineering Materials, vol. 1051, pp. 147–154, 2026, doi: 10.4028/p-nn14jh.","apa":"Gabsa, S., & Homberg, W. (2026). Material Transition by Friction Induced and Continuous Solid-State Recycling of Aluminum Scrap. Key Engineering Materials, 1051, 147–154. https://doi.org/10.4028/p-nn14jh"},"publication":"Key Engineering Materials","type":"journal_article","date_created":"2026-05-27T17:43:59Z"},{"abstract":[{"lang":"eng","text":"The further development of in-mold-assembly (IMA) technologies for structural hybrid components is of great importance for increasing the economic efficiency and thus the application potential. This paper presents an innovative IMA process concept for the manufacturing of bending loaded hybrid components consisting of two outer metal belts and an inner core structure made of glass mat reinforced thermoplastic (GMT). In this process, the core structure, which is provided with stiffening ribs and functional elements, is formed and joined to two metal belts in one single step. For experimental validation of the concept, the development of a prototypic molding tool and the manufacturing of hybrid beams including process parameters are described. Three-point bending tests and optical measurement technologies are used to characterize the failure behavior and mechanical properties of the produced hybrid beams. It was found that the innovative IMA process enables the manufacturing of hybrid components with high energy absorption and low weight in one step. The mass-specific energy absorption is increased by 693 % compared to pure GMT beams."}],"publication":"Key Engineering Materials","keyword":["Mechanical Engineering","Mechanics of Materials","General Materials Science"],"type":"journal_article","date_created":"2022-08-17T05:59:05Z","date_updated":"2022-08-17T06:02:07Z","publication_status":"published","intvolume":" 926","year":"2022","title":"In-Mold-Assembly of Hybrid Bending Structures by Compression Molding","publication_identifier":{"issn":["1662-9795"]},"author":[{"first_name":"Tim","last_name":"Stallmeister","full_name":"Stallmeister, Tim"},{"full_name":"Tröster, Thomas","first_name":"Thomas","last_name":"Tröster"}],"doi":"10.4028/p-5fxp53","main_file_link":[{"open_access":"1","url":"https://www.scientific.net/KEM.926.1457"}],"language":[{"iso":"eng"}],"citation":{"mla":"Stallmeister, Tim, and Thomas Tröster. “In-Mold-Assembly of Hybrid Bending Structures by Compression Molding.” Key Engineering Materials, vol. 926, Trans Tech Publications, Ltd., 2022, pp. 1457–67, doi:10.4028/p-5fxp53.","bibtex":"@article{Stallmeister_Tröster_2022, title={In-Mold-Assembly of Hybrid Bending Structures by Compression Molding}, volume={926}, DOI={10.4028/p-5fxp53}, journal={Key Engineering Materials}, publisher={Trans Tech Publications, Ltd.}, author={Stallmeister, Tim and Tröster, Thomas}, year={2022}, pages={1457–1467} }","ama":"Stallmeister T, Tröster T. In-Mold-Assembly of Hybrid Bending Structures by Compression Molding. Key Engineering Materials. 2022;926:1457-1467. doi:10.4028/p-5fxp53","ieee":"T. Stallmeister and T. Tröster, “In-Mold-Assembly of Hybrid Bending Structures by Compression Molding,” Key Engineering Materials, vol. 926, pp. 1457–1467, 2022, doi: 10.4028/p-5fxp53.","apa":"Stallmeister, T., & Tröster, T. (2022). In-Mold-Assembly of Hybrid Bending Structures by Compression Molding. Key Engineering Materials, 926, 1457–1467. https://doi.org/10.4028/p-5fxp53","short":"T. Stallmeister, T. Tröster, Key Engineering Materials 926 (2022) 1457–1467.","chicago":"Stallmeister, Tim, and Thomas Tröster. “In-Mold-Assembly of Hybrid Bending Structures by Compression Molding.” Key Engineering Materials 926 (2022): 1457–67. https://doi.org/10.4028/p-5fxp53."},"oa":"1","status":"public","user_id":"45538","volume":926,"page":"1457-1467","publisher":"Trans Tech Publications, Ltd.","_id":"32864"},{"language":[{"iso":"eng"}],"doi":"10.4028/p-32330d","publication_identifier":{"issn":["1662-9795"]},"author":[{"first_name":"Daniel","last_name":"Köhler","full_name":"Köhler, Daniel"},{"full_name":"Stephan, Richard","first_name":"Richard","last_name":"Stephan"},{"last_name":"Kupfer","first_name":"Robert","full_name":"Kupfer, Robert"},{"last_name":"Troschitz","first_name":"Juliane","full_name":"Troschitz, Juliane"},{"first_name":"Alexander","last_name":"Brosius","full_name":"Brosius, Alexander"},{"first_name":"Maik","last_name":"Gude","full_name":"Gude, Maik"}],"year":"2022","title":"Investigations on Combined in situ CT and Acoustic Analysis during Clinching","intvolume":" 926","publication_status":"published","date_updated":"2023-01-02T11:13:59Z","date_created":"2022-12-07T16:38:44Z","department":[{"_id":"630"}],"type":"conference","keyword":["Mechanical Engineering","Mechanics of Materials","General Materials Science"],"publication":"Key Engineering Materials","abstract":[{"text":"Clinching is a cost efficient method for joining components in series production. To assure the clinch point’s quality, the force displacement curve during clinching or the bottom thickness are monitored. The most significant geometrical characteristics of the clinch point, neck thickness and undercut, are usually tested destructively by microsectioning. However, micrograph preparation goes ahead with a resetting of elastic deformations and crack-closing after unloading. To generate a comprehensive knowledge of the clinch point’s inner geometry under load, in-situ computed tomography (CT) and acoustic testing (TDA) can be combined. While the TDA is highly sensitive to the inner state of the clinch point, it could detect critical events like crack development during loading. If such events are indicated, the loading process is stopped and a stepped in-situ CT of the following crack and deformation development is performed. In this paper, the concept is applied to the process of clinching itself, providing a detailed three-dimensional insight in the development of the joining zone. A test set-up is used which allows a stepwise clinching of two aluminium sheets EN AW 6014. Furthermore, this set-up is positioned within a CT system. In order to minimize X-ray absorption, a beryllium cylinder is used within the set-up frame and clinching tools are made from Si3N4. The actuator and sensor necessary for the TDA are integrated in the set-up. In regular process steps, the clinching process is interrupted in order to perform a TDA and a CT scan. In order to enhance the visibility of the interface, a thin tin layer is positioned between the sheets prior clinching. It is shown, that the test-set up allows a monitoring of the dynamic behaviour of the specimen during clinching while the CT scans visualize the inner geometry and material flow non-destructively.","lang":"eng"}],"publisher":"Trans Tech Publications, Ltd.","_id":"34280","page":"1489-1497","volume":926,"user_id":"14931","status":"public","citation":{"ieee":"D. Köhler, R. Stephan, R. Kupfer, J. Troschitz, A. Brosius, and M. Gude, “Investigations on Combined in situ CT and Acoustic Analysis during Clinching,” in Key Engineering Materials, 2022, vol. 926, pp. 1489–1497, doi: 10.4028/p-32330d.","apa":"Köhler, D., Stephan, R., Kupfer, R., Troschitz, J., Brosius, A., & Gude, M. (2022). Investigations on Combined in situ CT and Acoustic Analysis during Clinching. Key Engineering Materials, 926, 1489–1497. https://doi.org/10.4028/p-32330d","short":"D. Köhler, R. Stephan, R. Kupfer, J. Troschitz, A. Brosius, M. Gude, in: Key Engineering Materials, Trans Tech Publications, Ltd., 2022, pp. 1489–1497.","chicago":"Köhler, Daniel, Richard Stephan, Robert Kupfer, Juliane Troschitz, Alexander Brosius, and Maik Gude. “Investigations on Combined in Situ CT and Acoustic Analysis during Clinching.” In Key Engineering Materials, 926:1489–97. Trans Tech Publications, Ltd., 2022. https://doi.org/10.4028/p-32330d.","mla":"Köhler, Daniel, et al. “Investigations on Combined in Situ CT and Acoustic Analysis during Clinching.” Key Engineering Materials, vol. 926, Trans Tech Publications, Ltd., 2022, pp. 1489–97, doi:10.4028/p-32330d.","bibtex":"@inproceedings{Köhler_Stephan_Kupfer_Troschitz_Brosius_Gude_2022, title={Investigations on Combined in situ CT and Acoustic Analysis during Clinching}, volume={926}, DOI={10.4028/p-32330d}, booktitle={Key Engineering Materials}, publisher={Trans Tech Publications, Ltd.}, author={Köhler, Daniel and Stephan, Richard and Kupfer, Robert and Troschitz, Juliane and Brosius, Alexander and Gude, Maik}, year={2022}, pages={1489–1497} }","ama":"Köhler D, Stephan R, Kupfer R, Troschitz J, Brosius A, Gude M. Investigations on Combined in situ CT and Acoustic Analysis during Clinching. In: Key Engineering Materials. Vol 926. Trans Tech Publications, Ltd.; 2022:1489-1497. doi:10.4028/p-32330d"},"project":[{"name":"TRR 285: TRR 285","_id":"130","grant_number":"418701707"},{"name":"TRR 285 - C: TRR 285 - Project Area C","_id":"133"},{"_id":"148","name":"TRR 285 – C04: TRR 285 - Subproject C04"}]},{"type":"journal_article","keyword":["Mechanical Engineering","Mechanics of Materials","General Materials Science"],"department":[{"_id":"157"}],"date_created":"2022-07-25T11:16:15Z","abstract":[{"text":"Background. Clinching is a conventional cold forming process in which two or more sheets can be joined without auxiliary parts. A pre-forming of the parts to be joined, which is introduced by previous manufacturing steps, has an influence on the joining result. When considering the suitability for joining with regard to the formability of the materials, the influence of the preforming steps must be taken into account. The influences of strain hardening and sheet thickness on the joining properties must be investigated. In this context, a Finite Element Method (FEM) based metamodel analysis of the clinching process was carried out in [1] to investigate the robustness of the clinching process with respect to the different material pre-strains. In [2], the method was extended to the load bearing simulation.Procedure. The metamodel from preliminary work based on various FE models, which predicts the load-bearing capacity of a clinched joint influenced by pre-straining, is compared here with experimental data and the accuracy of the metamodel prediction is discussed. For this purpose an experimental procedure was further develop which allows the preforming of metal sheets from which joining specimens can be separated with a certain degree of unidirectional deformation. In the study, the procedure for preparing the joint specimens and the results of the loading tests are presented. Different possible relevant pre-strain combinations are investigated and compared with the simulation results, to validate the FE models and choose suitable metamodel.","lang":"eng"}],"publication":"Key Engineering Materials","doi":"10.4028/p-5d009y","language":[{"iso":"eng"}],"date_updated":"2023-01-12T14:22:52Z","publication_status":"published","intvolume":" 926","year":"2022","title":"Experimental and Numerical Investigation on Manufacturing-Induced Pre-Strain on the Load-Bearing Capacity of Clinched Joints","author":[{"id":"34782","full_name":"Bielak, Christian Roman","first_name":"Christian Roman","last_name":"Bielak"},{"id":"45779","full_name":"Böhnke, Max","first_name":"Max","last_name":"Böhnke"},{"full_name":"Bobbert, Mathias","last_name":"Bobbert","first_name":"Mathias","id":"7850"},{"full_name":"Meschut, Gerson","first_name":"Gerson","orcid":"0000-0002-2763-1246","last_name":"Meschut","id":"32056"}],"publication_identifier":{"issn":["1662-9795"]},"quality_controlled":"1","citation":{"mla":"Bielak, Christian Roman, et al. “Experimental and Numerical Investigation on Manufacturing-Induced Pre-Strain on the Load-Bearing Capacity of Clinched Joints.” Key Engineering Materials, vol. 926, Trans Tech Publications, Ltd., 2022, pp. 1516–26, doi:10.4028/p-5d009y.","ama":"Bielak CR, Böhnke M, Bobbert M, Meschut G. Experimental and Numerical Investigation on Manufacturing-Induced Pre-Strain on the Load-Bearing Capacity of Clinched Joints. Key Engineering Materials. 2022;926:1516-1526. doi:10.4028/p-5d009y","bibtex":"@article{Bielak_Böhnke_Bobbert_Meschut_2022, title={Experimental and Numerical Investigation on Manufacturing-Induced Pre-Strain on the Load-Bearing Capacity of Clinched Joints}, volume={926}, DOI={10.4028/p-5d009y}, journal={Key Engineering Materials}, publisher={Trans Tech Publications, Ltd.}, author={Bielak, Christian Roman and Böhnke, Max and Bobbert, Mathias and Meschut, Gerson}, year={2022}, pages={1516–1526} }","apa":"Bielak, C. R., Böhnke, M., Bobbert, M., & Meschut, G. (2022). Experimental and Numerical Investigation on Manufacturing-Induced Pre-Strain on the Load-Bearing Capacity of Clinched Joints. Key Engineering Materials, 926, 1516–1526. https://doi.org/10.4028/p-5d009y","ieee":"C. R. Bielak, M. Böhnke, M. Bobbert, and G. Meschut, “Experimental and Numerical Investigation on Manufacturing-Induced Pre-Strain on the Load-Bearing Capacity of Clinched Joints,” Key Engineering Materials, vol. 926, pp. 1516–1526, 2022, doi: 10.4028/p-5d009y.","chicago":"Bielak, Christian Roman, Max Böhnke, Mathias Bobbert, and Gerson Meschut. “Experimental and Numerical Investigation on Manufacturing-Induced Pre-Strain on the Load-Bearing Capacity of Clinched Joints.” Key Engineering Materials 926 (2022): 1516–26. https://doi.org/10.4028/p-5d009y.","short":"C.R. Bielak, M. Böhnke, M. Bobbert, G. Meschut, Key Engineering Materials 926 (2022) 1516–1526."},"user_id":"7850","volume":926,"page":"1516-1526","publisher":"Trans Tech Publications, Ltd.","_id":"32413","status":"public"},{"conference":{"name":"ESAFORM 2022","location":"Braga, Portugal"},"status":"public","volume":926,"user_id":"45779","publisher":"Trans Tech Publications, Ltd.","_id":"33002","page":"1564-1572","project":[{"name":"TRR 285: TRR 285","grant_number":"418701707","_id":"130"},{"name":"TRR 285 - A: TRR 285 - Project Area A","_id":"131"},{"_id":"135","name":"TRR 285 – A01: TRR 285 - Subproject A01"}],"quality_controlled":"1","citation":{"ieee":"M. Böhnke, E. Unruh, S. Sell, M. Bobbert, D. Hein, and G. Meschut, “Functionality Study of an Optical Measurement Concept for Local Force Signal Determination in High Strain Rate Tensile Tests,” Key Engineering Materials, vol. 926, pp. 1564–1572, 2022, doi: 10.4028/p-wpuzyw.","mla":"Böhnke, Max, et al. “Functionality Study of an Optical Measurement Concept for Local Force Signal Determination in High Strain Rate Tensile Tests.” Key Engineering Materials, vol. 926, Trans Tech Publications, Ltd., 2022, pp. 1564–72, doi:10.4028/p-wpuzyw.","apa":"Böhnke, M., Unruh, E., Sell, S., Bobbert, M., Hein, D., & Meschut, G. (2022). Functionality Study of an Optical Measurement Concept for Local Force Signal Determination in High Strain Rate Tensile Tests. Key Engineering Materials, 926, 1564–1572. https://doi.org/10.4028/p-wpuzyw","bibtex":"@article{Böhnke_Unruh_Sell_Bobbert_Hein_Meschut_2022, title={Functionality Study of an Optical Measurement Concept for Local Force Signal Determination in High Strain Rate Tensile Tests}, volume={926}, DOI={10.4028/p-wpuzyw}, journal={Key Engineering Materials}, publisher={Trans Tech Publications, Ltd.}, author={Böhnke, Max and Unruh, Eduard and Sell, Stanislaw and Bobbert, Mathias and Hein, David and Meschut, Gerson}, year={2022}, pages={1564–1572} }","short":"M. Böhnke, E. Unruh, S. Sell, M. Bobbert, D. Hein, G. Meschut, Key Engineering Materials 926 (2022) 1564–1572.","ama":"Böhnke M, Unruh E, Sell S, Bobbert M, Hein D, Meschut G. Functionality Study of an Optical Measurement Concept for Local Force Signal Determination in High Strain Rate Tensile Tests. Key Engineering Materials. 2022;926:1564-1572. doi:10.4028/p-wpuzyw","chicago":"Böhnke, Max, Eduard Unruh, Stanislaw Sell, Mathias Bobbert, David Hein, and Gerson Meschut. “Functionality Study of an Optical Measurement Concept for Local Force Signal Determination in High Strain Rate Tensile Tests.” Key Engineering Materials 926 (2022): 1564–72. https://doi.org/10.4028/p-wpuzyw."},"intvolume":" 926","publication_status":"published","date_updated":"2023-01-17T09:02:59Z","author":[{"id":"45779","full_name":"Böhnke, Max","last_name":"Böhnke","first_name":"Max"},{"full_name":"Unruh, Eduard","first_name":"Eduard","last_name":"Unruh","id":"72763"},{"full_name":"Sell, Stanislaw","last_name":"Sell","first_name":"Stanislaw"},{"id":"7850","last_name":"Bobbert","first_name":"Mathias","full_name":"Bobbert, Mathias"},{"first_name":"David","last_name":"Hein","full_name":"Hein, David","id":"7728"},{"full_name":"Meschut, Gerson","first_name":"Gerson","orcid":"0000-0002-2763-1246","last_name":"Meschut","id":"32056"}],"publication_identifier":{"issn":["1662-9795"]},"year":"2022","title":"Functionality Study of an Optical Measurement Concept for Local Force Signal Determination in High Strain Rate Tensile Tests","doi":"10.4028/p-wpuzyw","language":[{"iso":"eng"}],"abstract":[{"text":"Many mechanical material properties show a dependence on the strain rate, e.g. yield stress or elongation at fracture. The quantitative description of the material behavior under dynamic loading is of major importance for the evaluation of crash safety. This is carried out using numerical methods and requires characteristic values for the materials used. For the standardized determination of dynamic characteristic values in sheet metal materials, tensile tests performed according to the guideline from [1]. A particular challenge in dynamic tensile tests is the force measurement during the test. For this purpose, strain gauges are attached on each specimen, wired to the measuring equipment and calibrated. This is a common way to determine a force signal that is as low in vibration and as free of bending moments as possible. The preparation effort for the used strain gauges are enormous. For these reasons, an optical method to determine the force by strain measurement using DIC is presented. The experiments are carried out on a high speed tensile testing system. In combioantion with a 3D DIC high speed system for optical strain measurement. The elastic deformation of the specimen in the dynamometric section is measured using strain gauges and the optical method. The measured signals are then compared to validate the presented method. The investigations are conducted using the dual phase steel material HCT590X and the aluminum material EN AW-6014 T4. Strain rates of up to 240 s-1 are investigated.","lang":"eng"}],"publication":"Key Engineering Materials","department":[{"_id":"157"},{"_id":"630"}],"keyword":["Mechanical Engineering","Mechanics of Materials","General Materials Science"],"type":"journal_article","date_created":"2022-08-18T09:33:54Z"},{"publisher":"Trans Tech Publications, Ltd.","_id":"32412","page":"683-689","volume":926,"user_id":"64977","conference":{"end_date":"29 April 2022","name":"25th International Conference on Material Forming (ESAFORM 2022)","start_date":"27 April 2022","location":"Braga, Portugal"},"status":"public","citation":{"mla":"Dahms, Frederik, and Werner Homberg. “Manufacture of Defined Residual Stress Distributions in the Friction-Spinning Process: Driven Tool and Subsequent Flow-Forming.” Key Engineering Materials, vol. 926, Trans Tech Publications, Ltd., 2022, pp. 683–89, doi:10.4028/p-3rk19y.","ama":"Dahms F, Homberg W. Manufacture of Defined Residual Stress Distributions in the Friction-Spinning Process: Driven Tool and Subsequent Flow-Forming. Key Engineering Materials. 2022;926:683-689. doi:10.4028/p-3rk19y","bibtex":"@article{Dahms_Homberg_2022, title={Manufacture of Defined Residual Stress Distributions in the Friction-Spinning Process: Driven Tool and Subsequent Flow-Forming}, volume={926}, DOI={10.4028/p-3rk19y}, journal={Key Engineering Materials}, publisher={Trans Tech Publications, Ltd.}, author={Dahms, Frederik and Homberg, Werner}, year={2022}, pages={683–689} }","apa":"Dahms, F., & Homberg, W. (2022). Manufacture of Defined Residual Stress Distributions in the Friction-Spinning Process: Driven Tool and Subsequent Flow-Forming. Key Engineering Materials, 926, 683–689. https://doi.org/10.4028/p-3rk19y","ieee":"F. Dahms and W. Homberg, “Manufacture of Defined Residual Stress Distributions in the Friction-Spinning Process: Driven Tool and Subsequent Flow-Forming,” Key Engineering Materials, vol. 926, pp. 683–689, 2022, doi: 10.4028/p-3rk19y.","chicago":"Dahms, Frederik, and Werner Homberg. “Manufacture of Defined Residual Stress Distributions in the Friction-Spinning Process: Driven Tool and Subsequent Flow-Forming.” Key Engineering Materials 926 (2022): 683–89. https://doi.org/10.4028/p-3rk19y.","short":"F. Dahms, W. Homberg, Key Engineering Materials 926 (2022) 683–689."},"quality_controlled":"1","language":[{"iso":"eng"}],"doi":"10.4028/p-3rk19y","publication_identifier":{"issn":["1662-9795"]},"author":[{"full_name":"Dahms, Frederik","first_name":"Frederik","last_name":"Dahms","id":"64977"},{"first_name":"Werner","last_name":"Homberg","full_name":"Homberg, Werner","id":"233"}],"year":"2022","title":"Manufacture of Defined Residual Stress Distributions in the Friction-Spinning Process: Driven Tool and Subsequent Flow-Forming","intvolume":" 926","publication_status":"published","date_updated":"2023-04-27T10:30:38Z","date_created":"2022-07-25T08:32:43Z","department":[{"_id":"156"}],"type":"journal_article","keyword":["Mechanical Engineering","Mechanics of Materials","General Materials Science"],"publication":"Key Engineering Materials","abstract":[{"text":"Friction-spinning as an innovative incremental forming process enables large degrees of deformation in the field of tube and sheet metal forming due to a self-induced heat generation in the forming zone. This paper presents a new tool and process design with a driven tool for the targeted adjustment of residual stress distributions in the friction-spinning process. Locally adapted residual stress depth distributions are intended to improve the functionality of the friction-spinning workpieces, e.g. by delaying failure or triggering it in a defined way. The new process designs with the driven tool and a subsequent flow-forming operation are investigated regarding the influence on the residual stress depth distributions compared to those of standard friction-spinning process. Residual stress depth distributions are measured with the incremental hole-drilling method. The workpieces (tubular part with a flange) are manufactured using heat-treatable 3.3206 (EN-AW 6060 T6) tubular profiles. It is shown that the residual stress depth distributions change significantly due to the new process designs, which offers new potentials for the targeted adjustment of residual stresses that serve to improve the workpiece properties.","lang":"eng"}]},{"publication":"Key Engineering Materials","abstract":[{"lang":"eng","text":"The production of complex multi-functional, high-strength parts is becoming increasingly important in the industry. Especially with small batch size, the incremental flow forming processes can be advantageous. The production of parts with complex geometry and locally graded material properties currently depicts a great challenge in the flow forming process. At this point, the usage of closed-loop control for the shape and properties could be a feasible new solution. The overall aim in this project is to establish an intelligent closed-loop control system for the wall thickness as well as the α’-martensite content of AISI 304L-workpieces in a flow forming process. To reach this goal, a novel sensor concept for online measurements of the wall thickness reduction and the martensite content during forming process is proposed. It includes the setup of a modified flow forming machine and the integration of the sensor system in the machine control. Additionally, a simulation model for the flow forming process is presented which describes the forming process with regard to the plastic workpiece deformation, the induced α’-martensite fraction, and the sensor behavior. This model was used for designing a closed-loop process control of the wall thickness reduction that was subsequently realized at the real plant including online measured feedback from the sensor system."}],"date_created":"2022-11-04T08:27:33Z","keyword":["Mechanical Engineering","Mechanics of Materials","General Materials Science"],"type":"journal_article","department":[{"_id":"156"},{"_id":"153"},{"_id":"241"}],"title":"Innovative Online Measurement and Modelling Approach for Property-Controlled Flow Forming Processes","year":"2022","author":[{"last_name":"Kersting","first_name":"Lukas","full_name":"Kersting, Lukas"},{"id":"36287","full_name":"Arian, Bahman","first_name":"Bahman","last_name":"Arian"},{"full_name":"Vasquez, Julian Rozo","first_name":"Julian Rozo","last_name":"Vasquez"},{"full_name":"Trächtler, Ansgar","first_name":"Ansgar","last_name":"Trächtler","id":"552"},{"id":"233","first_name":"Werner","last_name":"Homberg","full_name":"Homberg, Werner"},{"full_name":"Walther, Frank","first_name":"Frank","last_name":"Walther"}],"publication_identifier":{"issn":["1662-9795"]},"publication_status":"published","date_updated":"2023-05-02T08:19:13Z","intvolume":" 926","language":[{"iso":"eng"}],"doi":"10.4028/p-yp2hj3","citation":{"mla":"Kersting, Lukas, et al. “Innovative Online Measurement and Modelling Approach for Property-Controlled Flow Forming Processes.” Key Engineering Materials, vol. 926, Trans Tech Publications, Ltd., 2022, pp. 862–74, doi:10.4028/p-yp2hj3.","ama":"Kersting L, Arian B, Vasquez JR, Trächtler A, Homberg W, Walther F. Innovative Online Measurement and Modelling Approach for Property-Controlled Flow Forming Processes. Key Engineering Materials. 2022;926:862-874. doi:10.4028/p-yp2hj3","bibtex":"@article{Kersting_Arian_Vasquez_Trächtler_Homberg_Walther_2022, title={Innovative Online Measurement and Modelling Approach for Property-Controlled Flow Forming Processes}, volume={926}, DOI={10.4028/p-yp2hj3}, journal={Key Engineering Materials}, publisher={Trans Tech Publications, Ltd.}, author={Kersting, Lukas and Arian, Bahman and Vasquez, Julian Rozo and Trächtler, Ansgar and Homberg, Werner and Walther, Frank}, year={2022}, pages={862–874} }","apa":"Kersting, L., Arian, B., Vasquez, J. R., Trächtler, A., Homberg, W., & Walther, F. (2022). Innovative Online Measurement and Modelling Approach for Property-Controlled Flow Forming Processes. Key Engineering Materials, 926, 862–874. https://doi.org/10.4028/p-yp2hj3","ieee":"L. Kersting, B. Arian, J. R. Vasquez, A. Trächtler, W. Homberg, and F. Walther, “Innovative Online Measurement and Modelling Approach for Property-Controlled Flow Forming Processes,” Key Engineering Materials, vol. 926, pp. 862–874, 2022, doi: 10.4028/p-yp2hj3.","chicago":"Kersting, Lukas, Bahman Arian, Julian Rozo Vasquez, Ansgar Trächtler, Werner Homberg, and Frank Walther. “Innovative Online Measurement and Modelling Approach for Property-Controlled Flow Forming Processes.” Key Engineering Materials 926 (2022): 862–74. https://doi.org/10.4028/p-yp2hj3.","short":"L. Kersting, B. Arian, J.R. Vasquez, A. Trächtler, W. Homberg, F. Walther, Key Engineering Materials 926 (2022) 862–874."},"quality_controlled":"1","status":"public","page":"862-874","publisher":"Trans Tech Publications, Ltd.","_id":"33999","user_id":"36287","volume":926},{"status":"public","volume":926,"user_id":"14931","_id":"32869","publisher":"Trans Tech Publications, Ltd.","page":"1457-1467","quality_controlled":"1","citation":{"bibtex":"@article{Stallmeister_Tröster_2022, title={In-Mold-Assembly of Hybrid Bending Structures by Compression Molding}, volume={926}, DOI={10.4028/p-5fxp53}, journal={Key Engineering Materials}, publisher={Trans Tech Publications, Ltd.}, author={Stallmeister, Tim and Tröster, Thomas}, year={2022}, pages={1457–1467} }","ama":"Stallmeister T, Tröster T. In-Mold-Assembly of Hybrid Bending Structures by Compression Molding. Key Engineering Materials. 2022;926:1457-1467. doi:10.4028/p-5fxp53","mla":"Stallmeister, Tim, and Thomas Tröster. “In-Mold-Assembly of Hybrid Bending Structures by Compression Molding.” Key Engineering Materials, vol. 926, Trans Tech Publications, Ltd., 2022, pp. 1457–67, doi:10.4028/p-5fxp53.","chicago":"Stallmeister, Tim, and Thomas Tröster. “In-Mold-Assembly of Hybrid Bending Structures by Compression Molding.” Key Engineering Materials 926 (2022): 1457–67. https://doi.org/10.4028/p-5fxp53.","short":"T. Stallmeister, T. Tröster, Key Engineering Materials 926 (2022) 1457–1467.","ieee":"T. Stallmeister and T. Tröster, “In-Mold-Assembly of Hybrid Bending Structures by Compression Molding,” Key Engineering Materials, vol. 926, pp. 1457–1467, 2022, doi: 10.4028/p-5fxp53.","apa":"Stallmeister, T., & Tröster, T. (2022). In-Mold-Assembly of Hybrid Bending Structures by Compression Molding. Key Engineering Materials, 926, 1457–1467. https://doi.org/10.4028/p-5fxp53"},"intvolume":" 926","publication_status":"published","date_updated":"2023-05-03T07:44:40Z","author":[{"full_name":"Stallmeister, Tim","last_name":"Stallmeister","first_name":"Tim","id":"45538"},{"full_name":"Tröster, Thomas","first_name":"Thomas","last_name":"Tröster","id":"553"}],"publication_identifier":{"issn":["1662-9795"]},"title":"In-Mold-Assembly of Hybrid Bending Structures by Compression Molding","year":"2022","doi":"10.4028/p-5fxp53","language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"The further development of in-mold-assembly (IMA) technologies for structural hybrid components is of great importance for increasing the economic efficiency and thus the application potential. This paper presents an innovative IMA process concept for the manufacturing of bending loaded hybrid components consisting of two outer metal belts and an inner core structure made of glass mat reinforced thermoplastic (GMT). In this process, the core structure, which is provided with stiffening ribs and functional elements, is formed and joined to two metal belts in one single step. For experimental validation of the concept, the development of a prototypic molding tool and the manufacturing of hybrid beams including process parameters are described. Three-point bending tests and optical measurement technologies are used to characterize the failure behavior and mechanical properties of the produced hybrid beams. It was found that the innovative IMA process enables the manufacturing of hybrid components with high energy absorption and low weight in one step. The mass-specific energy absorption is increased by 693 % compared to pure GMT beams."}],"publication":"Key Engineering Materials","department":[{"_id":"9"},{"_id":"149"},{"_id":"321"}],"keyword":["Mechanical Engineering","Mechanics of Materials","General Materials Science"],"type":"journal_article","date_created":"2022-08-17T07:28:31Z"},{"publication_identifier":{"issn":["1662-9795"]},"author":[{"full_name":"Köhler, Daniel","last_name":"Köhler","first_name":"Daniel"},{"last_name":"Stephan","first_name":"Richard","full_name":"Stephan, Richard"},{"full_name":"Kupfer, Robert","last_name":"Kupfer","first_name":"Robert"},{"full_name":"Troschitz, Juliane","last_name":"Troschitz","first_name":"Juliane"},{"full_name":"Brosius, Alexander","first_name":"Alexander","last_name":"Brosius"},{"full_name":"Gude, Maik","first_name":"Maik","last_name":"Gude"}],"title":"Investigations on Combined <i>In Situ</i> CT and Acoustic Analysis during Clinching","year":"2022","intvolume":" 926","date_updated":"2025-06-02T20:21:13Z","publication_status":"published","language":[{"iso":"eng"}],"doi":"10.4028/p-32330d","publication":"Key Engineering Materials","abstract":[{"text":"Clinching is a cost efficient method for joining components in series production. To assure the clinch point’s quality, the force displacement curve during clinching or the bottom thickness are monitored. The most significant geometrical characteristics of the clinch point, neck thickness and undercut, are usually tested destructively by microsectioning. However, micrograph preparation goes ahead with a resetting of elastic deformations and crack-closing after unloading. To generate a comprehensive knowledge of the clinch point’s inner geometry under load, in-situ computed tomography (CT) and acoustic testing (TDA) can be combined. While the TDA is highly sensitive to the inner state of the clinch point, it could detect critical events like crack development during loading. If such events are indicated, the loading process is stopped and a stepped in-situ CT of the following crack and deformation development is performed. In this paper, the concept is applied to the process of clinching itself, providing a detailed three-dimensional insight in the development of the joining zone. A test set-up is used which allows a stepwise clinching of two aluminium sheets EN AW 6014. Furthermore, this set-up is positioned within a CT system. In order to minimize X-ray absorption, a beryllium cylinder is used within the set-up frame and clinching tools are made from Si3N4. The actuator and sensor necessary for the TDA are integrated in the set-up. In regular process steps, the clinching process is interrupted in order to perform a TDA and a CT scan. In order to enhance the visibility of the interface, a thin tin layer is positioned between the sheets prior clinching. It is shown, that the test-set up allows a monitoring of the dynamic behaviour of the specimen during clinching while the CT scans visualize the inner geometry and material flow non-destructively.","lang":"eng"}],"date_created":"2024-02-06T15:04:45Z","department":[{"_id":"157"},{"_id":"43"}],"type":"journal_article","keyword":["Mechanical Engineering","Mechanics of Materials","General Materials Science"],"status":"public","publisher":"Trans Tech Publications, Ltd.","_id":"51197","page":"1489-1497","volume":926,"user_id":"83408","citation":{"mla":"Köhler, Daniel, et al. “Investigations on Combined &lt;I&gt;In Situ&lt;/I&gt; CT and Acoustic Analysis during Clinching.” Key Engineering Materials, vol. 926, Trans Tech Publications, Ltd., 2022, pp. 1489–97, doi:10.4028/p-32330d.","ama":"Köhler D, Stephan R, Kupfer R, Troschitz J, Brosius A, Gude M. Investigations on Combined &lt;i&gt;In Situ&lt;/i&gt; CT and Acoustic Analysis during Clinching. Key Engineering Materials. 2022;926:1489-1497. doi:10.4028/p-32330d","bibtex":"@article{Köhler_Stephan_Kupfer_Troschitz_Brosius_Gude_2022, title={Investigations on Combined &lt;i&gt;In Situ&lt;/i&gt; CT and Acoustic Analysis during Clinching}, volume={926}, DOI={10.4028/p-32330d}, journal={Key Engineering Materials}, publisher={Trans Tech Publications, Ltd.}, author={Köhler, Daniel and Stephan, Richard and Kupfer, Robert and Troschitz, Juliane and Brosius, Alexander and Gude, Maik}, year={2022}, pages={1489–1497} }","apa":"Köhler, D., Stephan, R., Kupfer, R., Troschitz, J., Brosius, A., & Gude, M. (2022). Investigations on Combined &lt;i&gt;In Situ&lt;/i&gt; CT and Acoustic Analysis during Clinching. Key Engineering Materials, 926, 1489–1497. https://doi.org/10.4028/p-32330d","ieee":"D. Köhler, R. Stephan, R. Kupfer, J. Troschitz, A. Brosius, and M. Gude, “Investigations on Combined &lt;i&gt;In Situ&lt;/i&gt; CT and Acoustic Analysis during Clinching,” Key Engineering Materials, vol. 926, pp. 1489–1497, 2022, doi: 10.4028/p-32330d.","chicago":"Köhler, Daniel, Richard Stephan, Robert Kupfer, Juliane Troschitz, Alexander Brosius, and Maik Gude. “Investigations on Combined &lt;I&gt;In Situ&lt;/I&gt; CT and Acoustic Analysis during Clinching.” Key Engineering Materials 926 (2022): 1489–97. https://doi.org/10.4028/p-32330d.","short":"D. Köhler, R. Stephan, R. Kupfer, J. Troschitz, A. Brosius, M. Gude, Key Engineering Materials 926 (2022) 1489–1497."},"project":[{"grant_number":"418701707","_id":"130","name":"TRR 285: TRR 285"},{"name":"TRR 285 - C: TRR 285 - Project Area C","_id":"133"},{"name":"TRR 285 – C04: TRR 285 - Subproject C04","_id":"148"}]},{"status":"public","page":"1468-1478","publisher":"Trans Tech Publications, Ltd.","_id":"37647","user_id":"7850","volume":926,"citation":{"mla":"Wischer, Christian, and Werner Homberg. “Further Development of an Adaptive Joining Technique Based on Friction Spinning to Produce Pre-Hole-Free Joints.” Key Engineering Materials, vol. 926, Trans Tech Publications, Ltd., 2022, pp. 1468–78, doi:10.4028/p-1n6741.","ama":"Wischer C, Homberg W. Further Development of an Adaptive Joining Technique Based on Friction Spinning to Produce Pre-Hole-Free Joints. Key Engineering Materials. 2022;926:1468-1478. doi:10.4028/p-1n6741","bibtex":"@article{Wischer_Homberg_2022, title={Further Development of an Adaptive Joining Technique Based on Friction Spinning to Produce Pre-Hole-Free Joints}, volume={926}, DOI={10.4028/p-1n6741}, journal={Key Engineering Materials}, publisher={Trans Tech Publications, Ltd.}, author={Wischer, Christian and Homberg, Werner}, year={2022}, pages={1468–1478} }","apa":"Wischer, C., & Homberg, W. (2022). Further Development of an Adaptive Joining Technique Based on Friction Spinning to Produce Pre-Hole-Free Joints. Key Engineering Materials, 926, 1468–1478. https://doi.org/10.4028/p-1n6741","ieee":"C. Wischer and W. Homberg, “Further Development of an Adaptive Joining Technique Based on Friction Spinning to Produce Pre-Hole-Free Joints,” Key Engineering Materials, vol. 926, pp. 1468–1478, 2022, doi: 10.4028/p-1n6741.","chicago":"Wischer, Christian, and Werner Homberg. “Further Development of an Adaptive Joining Technique Based on Friction Spinning to Produce Pre-Hole-Free Joints.” Key Engineering Materials 926 (2022): 1468–78. https://doi.org/10.4028/p-1n6741.","short":"C. Wischer, W. Homberg, Key Engineering Materials 926 (2022) 1468–1478."},"quality_controlled":"1","project":[{"_id":"147","name":"TRR 285 – C03: TRR 285 - Subproject C03"},{"name":"TRR 285 - Project Area C","_id":"133"},{"_id":"130","name":"TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten"}],"year":"2022","title":"Further Development of an Adaptive Joining Technique Based on Friction Spinning to Produce Pre-Hole-Free Joints","author":[{"last_name":"Wischer","first_name":"Christian","full_name":"Wischer, Christian"},{"last_name":"Homberg","first_name":"Werner","full_name":"Homberg, Werner"}],"publication_identifier":{"issn":["1662-9795"]},"publication_status":"published","date_updated":"2026-05-12T12:00:20Z","article_type":"original","intvolume":" 926","language":[{"iso":"eng"}],"doi":"10.4028/p-1n6741","publication":"Key Engineering Materials","abstract":[{"text":"Mechanical joining processes are an essential part of modern lightweight construction. They permit materials of different types to be joined in a way that is suitable for the loads involved. These processes reach their limits, however, as soon as the boundary conditions change. In most cases, these elements are specially adapted to the joining point and cannot be used universally. Changes require cost-intensive adaptation of both the element and the process control, thus making production more complex. This results in high costs due to the increased number of auxiliary joining element variants required and reduces the economic efficiency of mechanical joining. One approach to overcoming this issue is the use of adaptive auxiliary joining elements formed by friction spinning. This article presents the current state of research on pre-hole-free joining with adaptive joining elements. The overall process chain is illustrated, explained and analyzed. Special attention is paid to demonstrating the feasibility of pre-hole-free joining with adaptive joining elements. The chosen mechanical parameters are subsequently listed. Finally, a comprehensive outlook of the future development potential is derived.","lang":"eng"}],"date_created":"2023-01-20T07:47:18Z","type":"journal_article","keyword":["Mechanical Engineering","Mechanics of Materials","General Materials Science"],"department":[{"_id":"156"}]},{"publication":"Key Engineering Materials","date_created":"2021-04-27T08:33:03Z","department":[{"_id":"157"}],"type":"journal_article","publication_identifier":{"issn":["1662-9795"]},"author":[{"id":"71269","full_name":"Otroshi, Mortaza","orcid":"0000-0002-8652-9209","first_name":"Mortaza","last_name":"Otroshi"},{"id":"32056","orcid":"0000-0002-2763-1246","first_name":"Gerson","last_name":"Meschut","full_name":"Meschut, Gerson"},{"id":"34782","first_name":"Christian Roman","last_name":"Bielak","full_name":"Bielak, Christian Roman"},{"full_name":"Masendorf, Lukas","first_name":"Lukas","last_name":"Masendorf"},{"full_name":"Esderts, Alfons","first_name":"Alfons","last_name":"Esderts"}],"year":"2021","title":"Modeling of Stiffness Anisotropy in Simulation of Self-Piercing Riveted Components","intvolume":" 883","publication_status":"published","date_updated":"2022-04-25T07:49:04Z","language":[{"iso":"eng"}],"doi":"https://doi.org/10.4028/www.scientific.net/KEM.883.35","citation":{"ama":"Otroshi M, Meschut G, Bielak CR, Masendorf L, Esderts A. Modeling of Stiffness Anisotropy in Simulation of Self-Piercing Riveted Components. Key Engineering Materials. 2021;883:35-40. doi:https://doi.org/10.4028/www.scientific.net/KEM.883.35","bibtex":"@article{Otroshi_Meschut_Bielak_Masendorf_Esderts_2021, title={Modeling of Stiffness Anisotropy in Simulation of Self-Piercing Riveted Components}, volume={883}, DOI={https://doi.org/10.4028/www.scientific.net/KEM.883.35}, journal={Key Engineering Materials}, publisher={Trans Tech Publications Ltd}, author={Otroshi, Mortaza and Meschut, Gerson and Bielak, Christian Roman and Masendorf, Lukas and Esderts, Alfons}, year={2021}, pages={35–40} }","mla":"Otroshi, Mortaza, et al. “Modeling of Stiffness Anisotropy in Simulation of Self-Piercing Riveted Components.” Key Engineering Materials, vol. 883, Trans Tech Publications Ltd, 2021, pp. 35–40, doi:https://doi.org/10.4028/www.scientific.net/KEM.883.35.","chicago":"Otroshi, Mortaza, Gerson Meschut, Christian Roman Bielak, Lukas Masendorf, and Alfons Esderts. “Modeling of Stiffness Anisotropy in Simulation of Self-Piercing Riveted Components.” Key Engineering Materials 883 (2021): 35–40. https://doi.org/10.4028/www.scientific.net/KEM.883.35.","short":"M. Otroshi, G. Meschut, C.R. Bielak, L. Masendorf, A. Esderts, Key Engineering Materials 883 (2021) 35–40.","apa":"Otroshi, M., Meschut, G., Bielak, C. R., Masendorf, L., & Esderts, A. (2021). Modeling of Stiffness Anisotropy in Simulation of Self-Piercing Riveted Components. Key Engineering Materials, 883, 35–40. https://doi.org/10.4028/www.scientific.net/KEM.883.35","ieee":"M. Otroshi, G. Meschut, C. R. Bielak, L. Masendorf, and A. Esderts, “Modeling of Stiffness Anisotropy in Simulation of Self-Piercing Riveted Components,” Key Engineering Materials, vol. 883, pp. 35–40, 2021, doi: https://doi.org/10.4028/www.scientific.net/KEM.883.35."},"quality_controlled":"1","status":"public","_id":"21810","publisher":"Trans Tech Publications Ltd","page":"35-40","volume":883,"user_id":"71269"},{"citation":{"bibtex":"@article{Rossel_Böhnke_Bielak_Bobbert_Meschut_2021, title={Development of a Method for the Identification of Friction Coefficients in Sheet Metal Materials for the Numerical Simulation of Clinching Processes}, volume={883}, DOI={10.4028/www.scientific.net/kem.883.81}, journal={Key Engineering Materials}, publisher={Trans Tech Publications, Ltd.}, author={Rossel, Moritz Sebastian and Böhnke, Max and Bielak, Christian Roman and Bobbert, Mathias and Meschut, Gerson}, year={2021}, pages={81–88} }","ama":"Rossel MS, Böhnke M, Bielak CR, Bobbert M, Meschut G. Development of a Method for the Identification of Friction Coefficients in Sheet Metal Materials for the Numerical Simulation of Clinching Processes. Key Engineering Materials. 2021;883:81-88. doi:10.4028/www.scientific.net/kem.883.81","mla":"Rossel, Moritz Sebastian, et al. “Development of a Method for the Identification of Friction Coefficients in Sheet Metal Materials for the Numerical Simulation of Clinching Processes.” Key Engineering Materials, vol. 883, Trans Tech Publications, Ltd., 2021, pp. 81–88, doi:10.4028/www.scientific.net/kem.883.81.","chicago":"Rossel, Moritz Sebastian, Max Böhnke, Christian Roman Bielak, Mathias Bobbert, and Gerson Meschut. “Development of a Method for the Identification of Friction Coefficients in Sheet Metal Materials for the Numerical Simulation of Clinching Processes.” Key Engineering Materials 883 (2021): 81–88. https://doi.org/10.4028/www.scientific.net/kem.883.81.","short":"M.S. Rossel, M. Böhnke, C.R. Bielak, M. Bobbert, G. Meschut, Key Engineering Materials 883 (2021) 81–88.","ieee":"M. S. Rossel, M. Böhnke, C. R. Bielak, M. Bobbert, and G. Meschut, “Development of a Method for the Identification of Friction Coefficients in Sheet Metal Materials for the Numerical Simulation of Clinching Processes,” Key Engineering Materials, vol. 883, pp. 81–88, 2021, doi: 10.4028/www.scientific.net/kem.883.81.","apa":"Rossel, M. S., Böhnke, M., Bielak, C. R., Bobbert, M., & Meschut, G. (2021). Development of a Method for the Identification of Friction Coefficients in Sheet Metal Materials for the Numerical Simulation of Clinching Processes. Key Engineering Materials, 883, 81–88. https://doi.org/10.4028/www.scientific.net/kem.883.81"},"project":[{"_id":"130","grant_number":"418701707","name":"TRR 285: TRR 285"},{"name":"TRR 285 - A: TRR 285 - Project Area A","_id":"131"},{"name":"TRR 285 – A01: TRR 285 - Subproject A01","_id":"135"}],"quality_controlled":"1","status":"public","_id":"34227","publisher":"Trans Tech Publications, Ltd.","page":"81-88","volume":883,"user_id":"7850","publication":"Key Engineering Materials","abstract":[{"lang":"eng","text":"In order to reduce the fuel consumption and consequently the greenhouse emissions, the automotive industry is implementing lightweight constructions in the body in white production. As a result, the use of aluminum alloys is continuously increasing. Due to poor weldability of aluminum in combination with other materials, mechanical joining technologies like clinching are increasingly used. In order to predict relevant characteristics of clinched joints and to ensure the reliability of the process, it is simulated numerically during product development processes. In this regard the predictive accuracy of the simulated process highly depends on the implemented friction model. In particular, the frictional behavior between the sheet metals affects the geometrical formation of the clinched joint significantly. This paper presents a testing method, which enables to determine the frictional coefficients between sheet metal materials for the simulation of clinching processes. For this purpose, the correlation of interface pressure and the relative velocity between aluminum sheets in clinching processes is investigated using numerical simulation. Furthermore, the developed testing method focuses on the specimen geometry as well as the reproduction of the occurring friction conditions between two sheet metal materials in clinching processes. Based on a methodical approach the test setup is explained and the functionality of the method is proven by experimental tests using sheet metal material EN AW6014."}],"date_created":"2022-12-05T21:57:07Z","department":[{"_id":"630"},{"_id":"157"}],"type":"journal_article","keyword":["Mechanical Engineering","Mechanics of Materials","General Materials Science"],"publication_identifier":{"issn":["1662-9795"]},"author":[{"id":"44503","first_name":"Moritz Sebastian","last_name":"Rossel","full_name":"Rossel, Moritz Sebastian"},{"last_name":"Böhnke","first_name":"Max","full_name":"Böhnke, Max","id":"45779"},{"full_name":"Bielak, Christian Roman","first_name":"Christian Roman","last_name":"Bielak","id":"34782"},{"first_name":"Mathias","last_name":"Bobbert","full_name":"Bobbert, Mathias","id":"7850"},{"id":"32056","last_name":"Meschut","first_name":"Gerson","orcid":"0000-0002-2763-1246","full_name":"Meschut, Gerson"}],"title":"Development of a Method for the Identification of Friction Coefficients in Sheet Metal Materials for the Numerical Simulation of Clinching Processes","year":"2021","intvolume":" 883","publication_status":"published","date_updated":"2023-03-09T11:43:31Z","language":[{"iso":"eng"}],"doi":"10.4028/www.scientific.net/kem.883.81"},{"quality_controlled":"1","citation":{"mla":"Weiß, Deborah, et al. “Numerical and Experimental Fracture Mechanical Investigations of Clinchable Sheet Metals Made of HCT590X.” Key Engineering Materials, vol. 883, Trans Tech Publications, Ltd., 2021, pp. 127–32, doi:10.4028/www.scientific.net/kem.883.127.","ama":"Weiß D, Schramm B, Kullmer G. Numerical and Experimental Fracture Mechanical Investigations of Clinchable Sheet Metals Made of HCT590X. In: Key Engineering Materials. Vol 883. Trans Tech Publications, Ltd.; 2021:127-132. doi:10.4028/www.scientific.net/kem.883.127","bibtex":"@inproceedings{Weiß_Schramm_Kullmer_2021, title={Numerical and Experimental Fracture Mechanical Investigations of Clinchable Sheet Metals Made of HCT590X}, volume={883}, DOI={10.4028/www.scientific.net/kem.883.127}, booktitle={Key Engineering Materials}, publisher={Trans Tech Publications, Ltd.}, author={Weiß, Deborah and Schramm, Britta and Kullmer, Gunter}, year={2021}, pages={127–132} }","apa":"Weiß, D., Schramm, B., & Kullmer, G. (2021). Numerical and Experimental Fracture Mechanical Investigations of Clinchable Sheet Metals Made of HCT590X. Key Engineering Materials, 883, 127–132. https://doi.org/10.4028/www.scientific.net/kem.883.127","ieee":"D. Weiß, B. Schramm, and G. Kullmer, “Numerical and Experimental Fracture Mechanical Investigations of Clinchable Sheet Metals Made of HCT590X,” in Key Engineering Materials, online, 2021, vol. 883, pp. 127–132, doi: 10.4028/www.scientific.net/kem.883.127.","chicago":"Weiß, Deborah, Britta Schramm, and Gunter Kullmer. “Numerical and Experimental Fracture Mechanical Investigations of Clinchable Sheet Metals Made of HCT590X.” In Key Engineering Materials, 883:127–32. Trans Tech Publications, Ltd., 2021. https://doi.org/10.4028/www.scientific.net/kem.883.127.","short":"D. Weiß, B. Schramm, G. Kullmer, in: Key Engineering Materials, Trans Tech Publications, Ltd., 2021, pp. 127–132."},"status":"public","conference":{"end_date":"2021-03-31","location":"online","name":"19th International Conference on Sheet Metal","start_date":"2021-03-29"},"user_id":"45673","volume":883,"page":"127-132","publisher":"Trans Tech Publications, Ltd.","_id":"30675","abstract":[{"text":"In many areas of product manufacturing constructions consist of individual components and metal sheets that are joined together to form complex structures. A simple and industrial common method for joining dissimilar and coated materials is clinching. During the joining process and due to the service load cracks can occur in the area of the joint, propagate due to cyclic loading and consequently lead to structural failure. For the prevention of these damage cases, first of all knowledge about the fracture mechanical material parameters regarding the original material state of the sheet metals used within the clinching process are essential.Within the scope of this paper experimental and numerical preliminary investigations regarding the fracture mechanical behavior of sheet metals used within the clinching process are presented. Due to the low thickness of 1.5 mm of the material sheets, the development of a new specimen is necessary to determine the crack growth rate curve including the fracture mechanical parameters like the threshold against crack growth ΔKI,th and the fracture toughness KIC of the base material HCT590X. For the experimental determination of the crack growth rate curve the numerical calculation of the geometry factor function as well as the calibration function of this special specimen are essential. After the experimental validation of the numerically determined calibration function, crack growth rate curves are determined for the stress ratios R = 0.1 and R = 0.3 to examine the mean stress sensitivity. In addition, the different rolling directions of 0° and 90° in relation to the initial crack are taken into account in order to investigate the influence of the anisotropy due to rolling.","lang":"eng"}],"publication":"Key Engineering Materials","keyword":["Mechanical Engineering","Mechanics of Materials","General Materials Science"],"type":"conference","department":[{"_id":"143"}],"date_created":"2022-03-29T08:09:01Z","publication_status":"published","date_updated":"2023-04-27T10:13:19Z","intvolume":" 883","year":"2021","title":"Numerical and Experimental Fracture Mechanical Investigations of Clinchable Sheet Metals Made of HCT590X","publication_identifier":{"issn":["1662-9795"]},"author":[{"full_name":"Weiß, Deborah","last_name":"Weiß","first_name":"Deborah","id":"45673"},{"full_name":"Schramm, Britta","last_name":"Schramm","first_name":"Britta","id":"4668"},{"last_name":"Kullmer","first_name":"Gunter","full_name":"Kullmer, Gunter","id":"291"}],"doi":"10.4028/www.scientific.net/kem.883.127","language":[{"iso":"eng"}]},{"quality_controlled":"1","project":[{"name":"TRR 285: TRR 285","_id":"130","grant_number":"418701707"},{"name":"TRR 285 - C: TRR 285 - Project Area C","_id":"133"},{"name":"TRR 285 – C02: TRR 285 - Subproject C02","_id":"146"}],"citation":{"short":"F. Kappe, M. Bobbert, G. Meschut, Key Engineering Materials 883 (2021) 3–10.","chicago":"Kappe, Fabian, Mathias Bobbert, and Gerson Meschut. “New Approach for Versatile Self Piercing Riveting: Joining System and Auxiliary Part.” Key Engineering Materials 883 (2021): 3–10. https://doi.org/10.4028/www.scientific.net/kem.883.3.","apa":"Kappe, F., Bobbert, M., & Meschut, G. (2021). New Approach for Versatile Self Piercing Riveting: Joining System and Auxiliary Part. Key Engineering Materials, 883, 3–10. https://doi.org/10.4028/www.scientific.net/kem.883.3","ieee":"F. Kappe, M. Bobbert, and G. Meschut, “New Approach for Versatile Self Piercing Riveting: Joining System and Auxiliary Part,” Key Engineering Materials, vol. 883, pp. 3–10, 2021, doi: 10.4028/www.scientific.net/kem.883.3.","ama":"Kappe F, Bobbert M, Meschut G. New Approach for Versatile Self Piercing Riveting: Joining System and Auxiliary Part. Key Engineering Materials. 2021;883:3-10. doi:10.4028/www.scientific.net/kem.883.3","bibtex":"@article{Kappe_Bobbert_Meschut_2021, title={New Approach for Versatile Self Piercing Riveting: Joining System and Auxiliary Part}, volume={883}, DOI={10.4028/www.scientific.net/kem.883.3}, journal={Key Engineering Materials}, publisher={Trans Tech Publications, Ltd.}, author={Kappe, Fabian and Bobbert, Mathias and Meschut, Gerson}, year={2021}, pages={3–10} }","mla":"Kappe, Fabian, et al. “New Approach for Versatile Self Piercing Riveting: Joining System and Auxiliary Part.” Key Engineering Materials, vol. 883, Trans Tech Publications, Ltd., 2021, pp. 3–10, doi:10.4028/www.scientific.net/kem.883.3."},"status":"public","user_id":"66459","volume":883,"page":"3-10","publisher":"Trans Tech Publications, Ltd.","_id":"34226","abstract":[{"lang":"eng","text":"The increasing use of multi-material constructions lead to a continuous increase in the use of mechanical joining techniques due to the wide range of joining possibilities as well as the high load-bearing capacities of the joints. Nevertheless, the currently rigid tool systems are not able to react to changing boundary conditions, like changing the material-geometry-combination. Therefore research work is crucial with regard to versatile joining systems. In this paper, a new approach for a versatile self-piercing riveting process considering the joining system as well as the auxiliary joining part is presented."}],"publication":"Key Engineering Materials","keyword":["Mechanical Engineering","Mechanics of Materials","General Materials Science"],"type":"journal_article","department":[{"_id":"630"},{"_id":"157"}],"date_created":"2022-12-05T21:54:38Z","publication_status":"published","date_updated":"2023-04-27T08:52:59Z","intvolume":" 883","title":"New Approach for Versatile Self Piercing Riveting: Joining System and Auxiliary Part","year":"2021","author":[{"full_name":"Kappe, Fabian","first_name":"Fabian","last_name":"Kappe","id":"66459"},{"id":"7850","full_name":"Bobbert, Mathias","first_name":"Mathias","last_name":"Bobbert"},{"full_name":"Meschut, Gerson","last_name":"Meschut","first_name":"Gerson","orcid":"0000-0002-2763-1246","id":"32056"}],"publication_identifier":{"issn":["1662-9795"]},"doi":"10.4028/www.scientific.net/kem.883.3","language":[{"iso":"eng"}]},{"date_created":"2021-09-16T08:23:00Z","department":[{"_id":"321"},{"_id":"149"},{"_id":"630"}],"type":"journal_article","citation":{"ieee":"C. Steinfelder, S. Martin, A. Brosius, and T. Tröster, “Load Path Transmission in Joining Elements,” Key Engineering Materials, pp. 73–80, 2021, doi: 10.4028/www.scientific.net/kem.883.73.","apa":"Steinfelder, C., Martin, S., Brosius, A., & Tröster, T. (2021). Load Path Transmission in Joining Elements. Key Engineering Materials, 73–80. https://doi.org/10.4028/www.scientific.net/kem.883.73","chicago":"Steinfelder, Christian, Sven Martin, Alexander Brosius, and Thomas Tröster. “Load Path Transmission in Joining Elements.” Key Engineering Materials, 2021, 73–80. https://doi.org/10.4028/www.scientific.net/kem.883.73.","short":"C. Steinfelder, S. Martin, A. Brosius, T. Tröster, Key Engineering Materials (2021) 73–80.","mla":"Steinfelder, Christian, et al. “Load Path Transmission in Joining Elements.” Key Engineering Materials, 2021, pp. 73–80, doi:10.4028/www.scientific.net/kem.883.73.","bibtex":"@article{Steinfelder_Martin_Brosius_Tröster_2021, title={Load Path Transmission in Joining Elements}, DOI={10.4028/www.scientific.net/kem.883.73}, journal={Key Engineering Materials}, author={Steinfelder, Christian and Martin, Sven and Brosius, Alexander and Tröster, Thomas}, year={2021}, pages={73–80} }","ama":"Steinfelder C, Martin S, Brosius A, Tröster T. Load Path Transmission in Joining Elements. Key Engineering Materials. Published online 2021:73-80. doi:10.4028/www.scientific.net/kem.883.73"},"publication":"Key Engineering Materials","project":[{"name":"TRR 285: TRR 285","grant_number":"418701707","_id":"130"},{"name":"TRR 285 - B: TRR 285 - Project Area B","_id":"132"},{"name":"TRR 285 – B01: TRR 285 - Subproject B01","_id":"140"}],"quality_controlled":"1","abstract":[{"text":"The mechanical properties of joined structures are determined considerably by the chosen joining technology. With the aim of providing a method that enables a faster and more profound decision-making in the spatial distribution of joining points during product development, a new method for the load path analysis of joining points is presented. For an exemplary car body, the load type in the joining elements, i.e. pure tensile, shear and combined tensile-shear loads, is determined using finite element analysis (FEA). Based on the evaluated loads, the resulting load paths in selected joining points are analyzed using a 2D FE-model of a clinching point. State of the art methods for load path analysis are dependent on the selected coordinate system or the existing stress state. Thus, a general statement about the load transmission path is not possible at this time. Here, a novel method for the analysis of load paths is used, which is independent of the alignment of the analyzed geometry. The basic assumption of the new load path analysis method was confirmed by using a simple specimen with a square hole in different orientations. The results presented here show a possibility to display the load transmission path invariantly. In further steps, the method will be extended for 3D analysis and the investigation of more complex assemblies. The primary goal of this methodical approach is an even load distribution over the joining elements and the component. This will provide a basis for future design approaches aimed at reducing the number of joining elements in joined structures.","lang":"eng"}],"_id":"24541","language":[{"iso":"eng"}],"page":"73-80","user_id":"38177","doi":"10.4028/www.scientific.net/kem.883.73","publication_identifier":{"issn":["1662-9795"]},"author":[{"full_name":"Steinfelder, Christian","last_name":"Steinfelder","first_name":"Christian"},{"full_name":"Martin, Sven","last_name":"Martin","first_name":"Sven","id":"38177"},{"full_name":"Brosius, Alexander","first_name":"Alexander","last_name":"Brosius"},{"full_name":"Tröster, Thomas","first_name":"Thomas","last_name":"Tröster"}],"title":"Load Path Transmission in Joining Elements","status":"public","year":"2021","publication_status":"published","date_updated":"2023-04-28T11:57:49Z"},{"doi":"10.4028/www.scientific.net/kem.883.89","language":[{"iso":"eng"}],"intvolume":" 883","publication_status":"published","date_updated":"2025-06-02T20:19:57Z","publication_identifier":{"issn":["1662-9795"]},"author":[{"full_name":"Köhler, Daniel","last_name":"Köhler","first_name":"Daniel"},{"full_name":"Sadeghian, Behdad","last_name":"Sadeghian","first_name":"Behdad"},{"full_name":"Kupfer, Robert","last_name":"Kupfer","first_name":"Robert"},{"full_name":"Troschitz, Juliane","first_name":"Juliane","last_name":"Troschitz"},{"full_name":"Gude, Maik","last_name":"Gude","first_name":"Maik"},{"first_name":"Alexander","last_name":"Brosius","full_name":"Brosius, Alexander"}],"title":"A Method for Characterization of Geometric Deviations in Clinch Points with Computed Tomography and Transient Dynamic Analysis","year":"2021","department":[{"_id":"157"},{"_id":"43"}],"type":"journal_article","keyword":["Mechanical Engineering","Mechanics of Materials","General Materials Science"],"date_created":"2024-02-06T15:06:14Z","abstract":[{"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.","lang":"eng"}],"publication":"Key Engineering Materials","volume":883,"user_id":"83408","_id":"51202","publisher":"Trans Tech Publications, Ltd.","page":"89-96","status":"public","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"}],"citation":{"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","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.","chicago":"Köhler, Daniel, Behdad Sadeghian, Robert Kupfer, Juliane Troschitz, Maik Gude, and Alexander 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.","short":"D. Köhler, B. Sadeghian, R. Kupfer, J. Troschitz, M. Gude, A. Brosius, Key Engineering Materials 883 (2021) 89–96.","mla":"Köhler, Daniel, et al. “A Method for Characterization of Geometric Deviations in Clinch Points with Computed Tomography and Transient Dynamic Analysis.” Key Engineering Materials, vol. 883, Trans Tech Publications, Ltd., 2021, pp. 89–96, doi:10.4028/www.scientific.net/kem.883.89.","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","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}, publisher={Trans Tech Publications, Ltd.}, author={Köhler, Daniel and Sadeghian, Behdad and Kupfer, Robert and Troschitz, Juliane and Gude, Maik and Brosius, Alexander}, year={2021}, pages={89–96} }"}},{"publication":"Key Engineering Materials","citation":{"ama":"Wiesenmayer S, Müller M, Dornberger P, et al. Numerical Investigation of the Tool Load in Joining by Forming of Dissimilar Materials Using Shear-Clinching Technology. Key Engineering Materials. 2018:397-404. doi:10.4028/www.scientific.net/kem.767.397","bibtex":"@article{Wiesenmayer_Müller_Dornberger_Han_Hörhold_Meschut_Merklein_2018, title={Numerical Investigation of the Tool Load in Joining by Forming of Dissimilar Materials Using Shear-Clinching Technology}, DOI={10.4028/www.scientific.net/kem.767.397}, journal={Key Engineering Materials}, author={Wiesenmayer, Sebastian and Müller, Martin and Dornberger, Peter and Han, Daxin and Hörhold, Réjane and Meschut, Gerson and Merklein, Marion}, year={2018}, pages={397–404} }","mla":"Wiesenmayer, Sebastian, et al. “Numerical Investigation of the Tool Load in Joining by Forming of Dissimilar Materials Using Shear-Clinching Technology.” Key Engineering Materials, 2018, pp. 397–404, doi:10.4028/www.scientific.net/kem.767.397.","chicago":"Wiesenmayer, Sebastian, Martin Müller, Peter Dornberger, Daxin Han, Réjane Hörhold, Gerson Meschut, and Marion Merklein. “Numerical Investigation of the Tool Load in Joining by Forming of Dissimilar Materials Using Shear-Clinching Technology.” Key Engineering Materials, 2018, 397–404. https://doi.org/10.4028/www.scientific.net/kem.767.397.","short":"S. Wiesenmayer, M. Müller, P. Dornberger, D. Han, R. Hörhold, G. Meschut, M. Merklein, Key Engineering Materials (2018) 397–404.","apa":"Wiesenmayer, S., Müller, M., Dornberger, P., Han, D., Hörhold, R., Meschut, G., & Merklein, M. (2018). Numerical Investigation of the Tool Load in Joining by Forming of Dissimilar Materials Using Shear-Clinching Technology. Key Engineering Materials, 397–404. https://doi.org/10.4028/www.scientific.net/kem.767.397","ieee":"S. Wiesenmayer et al., “Numerical Investigation of the Tool Load in Joining by Forming of Dissimilar Materials Using Shear-Clinching Technology,” Key Engineering Materials, pp. 397–404, 2018."},"abstract":[{"lang":"eng","text":"Modern developments in the automotive sector are motivated by the objective of lowering the emission of pollutants. In contrast, growing demands for safety and comfort lead to a potential increase of the weight of vehicles. Thus, the consequent use of lightweight design is indispensable. This includes the use of different materials for the construction of car bodies. Because of various material properties, joining of dissimilar materials is challenging and requires often the application of non-thermic processes like riveting or clinching. These processes are limited by the mechanical properties of the joining partners. Especially the increasing use of ultra-high strength alloys, like the hot stamped steel 22MnB5, makes the development of new joining technologies necessary. One of these innovative technologies is shear-clinching. By combining shear-cutting and clinching in one process, this technology produces durable and tight connections of dissimilar materials with high differences regarding strength and formability. In contrast to shear-cutting the die-sided material has no contact with the punch. Since the process of shear-clinching is a combination of cutting and joining using the same tool, the tool loads differ from common shear-cutting. Especially cutting hot stamped steels is a challenge due to their high ultimate strength which leads to high tool loads. Thus, the analysis of the load condition is essential for the dimensioning of durable and wear resistant tools. Hence, the scope of this paper is a numerical investigation of the tool loads during the indirect cutting process and the subsequent step of joining by forming during shear-clinching. Since an experimental investigation of the occurring tool loads in the closed process is not practicable, the finite element method has to be used. Therefore, a damage-based numerical model is set up to enable the coupled simulation of the combined cutting and joining process and the resulting tool loads. This allows the analysis of the loads during the whole process, identifying the influences of materials and sheet thicknesses."}],"date_created":"2020-11-04T14:32:49Z","type":"journal_article","department":[{"_id":"157"}],"status":"public","title":"Numerical Investigation of the Tool Load in Joining by Forming of Dissimilar Materials Using Shear-Clinching Technology","year":"2018","publication_identifier":{"issn":["1662-9795"]},"author":[{"full_name":"Wiesenmayer, Sebastian","first_name":"Sebastian","last_name":"Wiesenmayer"},{"last_name":"Müller","first_name":"Martin","full_name":"Müller, Martin"},{"last_name":"Dornberger","first_name":"Peter","full_name":"Dornberger, Peter"},{"last_name":"Han","first_name":"Daxin","full_name":"Han, Daxin","id":"36544"},{"full_name":"Hörhold, Réjane","first_name":"Réjane","last_name":"Hörhold"},{"id":"32056","full_name":"Meschut, Gerson","orcid":"0000-0002-2763-1246","first_name":"Gerson","last_name":"Meschut"},{"full_name":"Merklein, Marion","last_name":"Merklein","first_name":"Marion"}],"publication_status":"published","date_updated":"2022-01-06T06:54:25Z","article_type":"original","page":"397-404","_id":"20282","language":[{"iso":"eng"}],"user_id":"36544","doi":"10.4028/www.scientific.net/kem.767.397"},{"publication":"Key Engineering Materials","citation":{"ieee":"D. Han, R. Hörhold, M. Müller, S. Wiesenmayer, M. Merklein, and G. Meschut, “Shear-Clinching of Multi-Element Specimens of Aluminium Alloy and Ultra-High-Strength Steel,” Key Engineering Materials, pp. 389–396, 2018, doi: 10.4028/www.scientific.net/kem.767.389.","apa":"Han, D., Hörhold, R., Müller, M., Wiesenmayer, S., Merklein, M., & Meschut, G. (2018). Shear-Clinching of Multi-Element Specimens of Aluminium Alloy and Ultra-High-Strength Steel. Key Engineering Materials, 389–396. https://doi.org/10.4028/www.scientific.net/kem.767.389","chicago":"Han, Daxin, Réjane Hörhold, Martin Müller, Sebastian Wiesenmayer, Marion Merklein, and Gerson Meschut. “Shear-Clinching of Multi-Element Specimens of Aluminium Alloy and Ultra-High-Strength Steel.” Key Engineering Materials, 2018, 389–96. https://doi.org/10.4028/www.scientific.net/kem.767.389.","short":"D. Han, R. Hörhold, M. Müller, S. Wiesenmayer, M. Merklein, G. Meschut, Key Engineering Materials (2018) 389–396.","mla":"Han, Daxin, et al. “Shear-Clinching of Multi-Element Specimens of Aluminium Alloy and Ultra-High-Strength Steel.” Key Engineering Materials, 2018, pp. 389–96, doi:10.4028/www.scientific.net/kem.767.389.","bibtex":"@article{Han_Hörhold_Müller_Wiesenmayer_Merklein_Meschut_2018, title={Shear-Clinching of Multi-Element Specimens of Aluminium Alloy and Ultra-High-Strength Steel}, DOI={10.4028/www.scientific.net/kem.767.389}, journal={Key Engineering Materials}, author={Han, Daxin and Hörhold, Réjane and Müller, Martin and Wiesenmayer, Sebastian and Merklein, Marion and Meschut, Gerson}, year={2018}, pages={389–396} }","ama":"Han D, Hörhold R, Müller M, Wiesenmayer S, Merklein M, Meschut G. Shear-Clinching of Multi-Element Specimens of Aluminium Alloy and Ultra-High-Strength Steel. Key Engineering Materials. Published online 2018:389-396. doi:10.4028/www.scientific.net/kem.767.389"},"abstract":[{"lang":"eng","text":"The newly developed joining-by-forming technology “shear-clinching”, features a potentially single-stage process for joining UHSS without requiring any additional elements. Foundational studies have focused on the functionality of shear-clinching at a one-element sample. To ensure the safety of the industrial application of the shear-clinching technology, an investigation with component-like samples with several joints is required. This paper presents a detailed analysis of the material behaviour during the shear-clinching process with multi-element specimens to evaluate the influence of the neighbouring joints. In order to describe the influence of the neighbouring joints, the deformations resulting from the bending and material displacement are recorded without contact after the joining process: locally around the joining point and globally over the entire sample size. To minimize such bending effects, a tool-sided adaptation is provided. The results show the high potential of shear-clinching joining by UHSS and give further recommendations for future multi-material application."}],"date_created":"2020-11-04T14:28:19Z","type":"journal_article","department":[{"_id":"157"}],"title":"Shear-Clinching of Multi-Element Specimens of Aluminium Alloy and Ultra-High-Strength Steel","year":"2018","status":"public","publication_identifier":{"issn":["1662-9795"]},"author":[{"id":"36544","first_name":"Daxin","last_name":"Han","full_name":"Han, Daxin"},{"full_name":"Hörhold, Réjane","last_name":"Hörhold","first_name":"Réjane"},{"first_name":"Martin","last_name":"Müller","full_name":"Müller, Martin"},{"first_name":"Sebastian","last_name":"Wiesenmayer","full_name":"Wiesenmayer, Sebastian"},{"last_name":"Merklein","first_name":"Marion","full_name":"Merklein, Marion"},{"last_name":"Meschut","first_name":"Gerson","orcid":"0000-0002-2763-1246","full_name":"Meschut, Gerson","id":"32056"}],"date_updated":"2023-06-06T14:27:27Z","publication_status":"published","article_type":"original","page":"389-396","_id":"20281","language":[{"iso":"eng"}],"doi":"10.4028/www.scientific.net/kem.767.389","user_id":"14931"},{"citation":{"ama":"Schweizer S, Becker-Staines A, Tröster T. Separation of Hybrid Structures for the Reclaim of their Single Components. Key Engineering Materials. 2017:568-575. doi:10.4028/www.scientific.net/kem.742.568","bibtex":"@article{Schweizer_Becker-Staines_Tröster_2017, title={Separation of Hybrid Structures for the Reclaim of their Single Components}, DOI={10.4028/www.scientific.net/kem.742.568}, journal={Key Engineering Materials}, author={Schweizer, Swetlana and Becker-Staines, Anna and Tröster, Thomas}, year={2017}, pages={568–575} }","mla":"Schweizer, Swetlana, et al. “Separation of Hybrid Structures for the Reclaim of Their Single Components.” Key Engineering Materials, 2017, pp. 568–75, doi:10.4028/www.scientific.net/kem.742.568.","chicago":"Schweizer, Swetlana, Anna Becker-Staines, and Thomas Tröster. “Separation of Hybrid Structures for the Reclaim of Their Single Components.” Key Engineering Materials, 2017, 568–75. https://doi.org/10.4028/www.scientific.net/kem.742.568.","short":"S. Schweizer, A. Becker-Staines, T. Tröster, Key Engineering Materials (2017) 568–575.","apa":"Schweizer, S., Becker-Staines, A., & Tröster, T. (2017). Separation of Hybrid Structures for the Reclaim of their Single Components. Key Engineering Materials, 568–575. https://doi.org/10.4028/www.scientific.net/kem.742.568","ieee":"S. Schweizer, A. Becker-Staines, and T. Tröster, “Separation of Hybrid Structures for the Reclaim of their Single Components,” Key Engineering Materials, pp. 568–575, 2017."},"publication":"Key Engineering Materials","abstract":[{"lang":"eng","text":"The main objective for an economic and ecological use of raw materials is the achievement of closed raw material cycles. Because of that, not only the manufacturing procedures are important during the development of new materials but also the recycling processes. Within the increased use of lightweight construction in recent years, the application of multi-material or hybrid structures reach high significance for the automotive industry. In this development, especially the carbon fibre reinforced plastics (CFRP) gained its importance. However, currently there are no recycling strategies available for hybrid structures; complete recycling processes for CFRP are still expandable. This work presents methods for separation of hybrid structures made of metal and CFRP, as well as the corresponding process windows and the boundary conditions. The separation is performed by introduction of thermal heat and the behaviour of these bonded compounds is analyzed based on shear tensile tests. The results of these studies are used to develop a complete recycling process for reclamation of hybrid structures."}],"date_created":"2020-02-24T16:32:21Z","department":[{"_id":"9"},{"_id":"321"},{"_id":"149"}],"type":"journal_article","author":[{"full_name":"Schweizer, Swetlana","last_name":"Schweizer","first_name":"Swetlana","id":"8938"},{"full_name":"Becker-Staines, Anna","first_name":"Anna","last_name":"Becker-Staines"},{"id":"553","full_name":"Tröster, Thomas","first_name":"Thomas","last_name":"Tröster"}],"publication_identifier":{"issn":["1662-9795"]},"status":"public","year":"2017","title":"Separation of Hybrid Structures for the Reclaim of their Single Components","publication_status":"published","date_updated":"2022-01-06T06:52:42Z","_id":"16062","language":[{"iso":"eng"}],"page":"568-575","user_id":"72008","doi":"10.4028/www.scientific.net/kem.742.568"}]