@inbook{58440, author = {{Wippermann, Jan and Meschut, Gerson}}, booktitle = {{Proceedings of the Munich Symposium on Lightweight Design 2023}}, isbn = {{9783031646683}}, publisher = {{Springer Nature Switzerland}}, title = {{{Effect of Water Absorption on the Clamp Load of Plastic Nuts}}}, doi = {{10.1007/978-3-031-64669-0_5}}, year = {{2024}}, } @article{58442, author = {{Wippermann, Jan and Meschut, Gerson}}, journal = {{JOINING PLASTICS}}, title = {{{Analyse des Ein- und Überdrehmoments von Kunststoffmuttern in Abhängigkeit von der Luftfeuchtigkeit}}}, volume = {{18}}, year = {{2024}}, } @inproceedings{58446, author = {{Wippermann, Jan and Meschut, Gerson}}, booktitle = {{14 Gemeinsames Kolloquium Zur Mechanischen Fügetechnik}}, title = {{{Entwicklung einer Methode zur Prognose der Verschraubungsparameter von Kunststoffmuttern}}}, year = {{2024}}, } @inproceedings{58458, author = {{Gilich, Julian and Teutenberg, Dominik and Meschut, Gerson and Gröger, Benjamin and Wiebicke, Felix and Koch, Ilja and Gude, Maik}}, booktitle = {{77th IIW Annual Assembly and International Conference on Welding and Joining}}, location = {{Rhodos, Griechenland}}, title = {{{Influences on the Material Displacement and Compression Stresses in the Joining Process of Highly Viscous Thermal Interface Materials}}}, year = {{2024}}, } @inproceedings{59237, abstract = {{Batch and process fluctuations during the fabrication of sheet metal components result in discrepancies in the resulting component properties, affecting subsequent process steps and potentially leading to production rejects. Consequently, the identification of deviations and knowledge of the effects of fluctuations are crucial for achieving consistently high product quality, reducing waste and thus increasing resource efficiency of production processes through countermeasures derived from this. The approach presented to address this is the use of data-driven metamodeling to map entire process chains and predict process parameters in order to compensate for process and batch fluctuation. The investigated process chain consists of the sub-processes deep drawing, clamping and clinching. For each process step, relevant input and output variables are identified, numerical simulation models are created, and subsequently validated. Variant simulations of the sub-processes are conducted and evaluated to generate a database for the metamodeling of the individual process steps. Machine learning techniques are utilized for the automated selection and optimization of learning methods to create models that depict the relationships between input and output variables. Finally, the models for the sub-processes are linked together to form a superordinate metamodel for the entire process chain, with the aim to make inline-process adaptations possible.2) emissions significantly. As the mobility sector is a major contributor to CO2, various strategies are being pursued to achieve the climate targets set. An increasingly applied lightweight design method is the use of multi-material constructions. To join these structures, mechanical joining technologies such as self-pierce riveting are being used. As a result of the currently rigid tool systems, which cannot react to changing boundary conditions, a large number of rivet–die combinations is required to join the rising number of materials as well as material thickness combinations. Thus, new, versatile joining technologies are needed that can react to the described changes. The versatile self-piercing riveting (V-SPR) process is one possible approach. In this process, different material thicknesses can be joined by using a multi-range capable rivet which is set by a joining system with extended actuator technology. In this study, the V-SPR joining process is analysed numerically according to the influence of the geometrical rivet parameters on the joints characteristics as well as the resulting material flow. The investigations showed that the shank geometry has a decisive influence on the expansion of the rivet. Furthermore, the rivet length could be proven to be an influencing factor. By changing the head radii and the protrusion height, the forming behaviour of the rivet head onto the punch-sided joining part could be improved and thus the formation of air pockets was prevented. Based on the numerical investigations, a novel rivet geometry was developed and produced by machining. Subsequently, experimentally produced joints were analysed according to their joint formation and load-bearing capacity.}}, author = {{Kappe, Fabian and Bobbert, Mathias and Meschut, Gerson}}, issn = {{0954-4089}}, journal = {{Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering}}, publisher = {{SAGE Publications}}, title = {{{Investigation of the influence of the rivet geometry on joint formation for a versatile self-piercing riveting process}}}, doi = {{10.1177/09544089241263141}}, year = {{2024}}, } @article{61416, abstract = {{Abstract An efficient lightweight construction method is the combination of different materials in order to adapt the structure to the applied load. To join these multi-material structures mechanical joining technologies are applied. However, the rigid tooling systems cannot be adjusted to changing boundary conditions which is why new, versatile joining technologies are required. In the versatile self-piercing riveting (V-SPR) process presented in [1] different material combination are joined by using a multi-range capable rivet. The rivet head is formed onto the respective thickness of the joint by an outer punch. In order to punch thru the upper sheet a great rivet hardness is required whereas a lower hardness is required for the subsequent forming of the rivet head. To achieve a combination of these requirements, this study investigates a local heat treatment of the rivet. The aim is to determine the feasibility of such a heat treatment as well as to investigate the influence on the joint formation.}}, author = {{Kappe, Fabian and Bobbert, Mathias and Meschut, Gerson}}, issn = {{1757-8981}}, journal = {{IOP Conference Series: Materials Science and Engineering}}, number = {{1}}, publisher = {{IOP Publishing}}, title = {{{Influence of local heat treatment of rivets on the joint formation of a versatile joining process}}}, doi = {{10.1088/1757-899x/1307/1/012009}}, volume = {{1307}}, year = {{2024}}, } @article{57311, author = {{Yang, Keke and Sowada, Matthias and Olfert, Viktoria and Seitz, Georg and Schreiber, Vincent and Heitmann, Marcel and Hein, David and Biegler, Max and Jüttner, Sven and Rethmeier, Michael and Meschut, Gerson}}, issn = {{2238-7854}}, journal = {{Journal of Materials Research and Technology}}, publisher = {{Elsevier BV}}, title = {{{Influence of liquid metal embrittlement on the failure behavior of dissimilar spot welds with advanced high-strength steel: A component study}}}, doi = {{10.1016/j.jmrt.2024.11.166}}, year = {{2024}}, } @article{57575, author = {{Beule, Felix and Teutenberg, Dominik and Meschut, Gerson}}, issn = {{0169-4243}}, journal = {{Journal of Adhesion Science and Technology}}, pages = {{1--20}}, publisher = {{Informa UK Limited}}, title = {{{Analysis of the anisotropic mechanical properties of structural adhesive joints with curing-induced pre-deformations}}}, doi = {{10.1080/01694243.2024.2427799}}, year = {{2024}}, } @article{56677, abstract = {{The rapid advancement in the electrification of modern vehicles has led to a continuous increase in electrical consumers for various comfort and safety functions. Ground studs serve as the electrical interface between the conductive vehicle body and the onboard network. Drawn arc stud welding is an economical and established joining process for producing ground stud joints. The circuits in the onboard network are increasingly subject to greater demands regarding current-carrying capacity and long-term stability. Reliable signal and power transmission require minimal contact resistance at the electrical connection points of the ground stud system and must withstand various operating and environmental conditions over the entire service life. In this study, a ground stud made of AlMg5, with a ZnNi-coated steel cap nut was used on a 2.0 mm thick sheet of AlMg3. The electrical connection of the ground studs was made using tinned copper cable lugs and 35 mm² cables. To analyze the electrical resistance behavior in an accelerated test, the ground studs were subjected to a superimposed load with a cyclic current profile for 1008 hours under changing climatic conditions. The results show that under the chosen operational and environmental conditions, accelerated aging and intermittent resistance behavior occur. A characteristic drop in resistance during the test indicates the failure point of the electrical connection. The cause of failure can be attributed to media penetration into the electrical contact zone. A failure of the electrical connection was observed after 512 hours.}}, author = {{Haak, Viktor and Yang, Keke and Meschut, Gerson}}, issn = {{2666-3309}}, journal = {{Journal of Advanced Joining Processes}}, keywords = {{Stud welding, aluminum grounding connection, electrical resistance, superimposed load}}, publisher = {{Elsevier BV}}, title = {{{Investigation of the electrical quality and long-term stability of aluminum ground stud connections in automotive applications}}}, doi = {{10.1016/j.jajp.2024.100262}}, volume = {{10}}, year = {{2024}}, } @inproceedings{52213, author = {{Beule, Felix and Sander, Sascha and Meschut, Gerson and Damm, Jannis and Kasper, Yann and Albiez, Matthias and Kötz, Fabian and Matzenmiller, Anton}}, booktitle = {{24. Kolloquium: Gemeinsame Forschung in der Klebtechnik}}, location = {{Köln}}, title = {{{Methodenentwicklung zur rechnerischen Auslegung geklebter Stahlverbindungen unter Alterungsbeanspruchung im Stahl- und Anlagenbau}}}, year = {{2024}}, } @inproceedings{60617, author = {{Hermelingmeier, Lucas and Aßmuth, Verena and Teutenberg, Dominik and Meschut, Gerson}}, booktitle = {{77th IIW Annual Assembly and International Conference on Welding and Joining}}, location = {{Rhodos, Greece}}, title = {{{The influence of embedded fiber optic sensors on the global mechanical behavior of adhesively bonded joints}}}, year = {{2024}}, } @article{57742, author = {{Böhnke, Max and Bielak, Christian Roman and Beck, Robert and Bobbert, Mathias and Meschut, Gerson}}, issn = {{2223-7690}}, journal = {{Friction}}, publisher = {{Tsinghua University Press}}, title = {{{Development of a friction model for the numerical simulation of clinching processes}}}, doi = {{10.26599/frict.2025.9441052}}, year = {{2024}}, } @article{59585, abstract = {{Similar to bulk metal forming, clinch joining is characterised by large plastic deformations and a variety of different 3D stress states, including severe compression. However, inherent to plastic forming is the nucleation and growth of defects, whose detrimental effects on the material behaviour can be described by continuum damage models and eventually lead to material failure. As the damage evolution strongly depends on the stress state, a stress-state-dependent model is utilised to correctly track the accumulation. To formulate and parameterise this model, besides classical experiments, so-called modified punch tests are also integrated herein to enhance the calibration of the failure model by capturing a larger range of stress states and metal-forming-specific loading conditions. Moreover, when highly ductile materials are considered, such as the dual-phase steel HCT590X and the aluminium alloy EN AW-6014 T4 investigated here, strong necking and localisation might occur prior to fracture. This can alter the stress state and affect the actual strain at failure. This influence is captured by coupling plasticity and damage to incorporate the damage-induced softening effect. Its relative importance is shown by conducting inverse parameter identifications to determine damage and failure parameters for both mentioned ductile metals based on up to 12 different experiments.}}, author = {{Friedlein, Johannes and Böhnke, Max and Schlichter, Malte Christian and Bobbert, Mathias and Meschut, Gerson and Mergheim, Julia and Steinmann, Paul}}, issn = {{2504-4494}}, journal = {{Journal of Manufacturing and Materials Processing}}, number = {{4}}, publisher = {{MDPI AG}}, title = {{{Material Parameter Identification for a Stress-State-Dependent Ductile Damage and Failure Model Applied to Clinch Joining}}}, doi = {{10.3390/jmmp8040157}}, volume = {{8}}, year = {{2024}}, } @article{46295, author = {{Bartley, Aurélie and Chudalla, Nick and Meschut, Gerson and Wibbeke, Tim Michael}}, journal = {{International Journal of Adhesion and Adhesives}}, title = {{{Low temperature debonding of toughened structural adhesive joints: A new approach to repairs in the automotive industry}}}, doi = {{https://doi.org/10.1016/j.ijadhadh.2023.103486}}, volume = {{126}}, year = {{2023}}, }