@inproceedings{59878,
  abstract     = {{<jats:p>Abstract. In the development of advanced lightweight automotive solutions, self-piercing riveting (SPR) offers the possibility of joining multi-material structures to fulfil a wide variety of requirements. With regard to the entire process chain, production-related pre-deformations of the parts to be joined can influence the geometric shape and load capacity of SPR joints. Various studies have investigated the influence of pre-stretched sheet materials, in the sense of pre-drawing processes, on the formation of SPR joints. The impact of pre-stretching sheet metals on the formation of their geometrical characteristics and the shear-tensile strength of SPR processes was observed [1]. Pre-rolled semi-finished products are also joined together in mixed material automotive structures, e.g. tailor rolled blanks. This work aims to investigate the influence of pre-rolled joining parts on the geometric formation and load-carrying capacity of SPR joints. For this purpose, sheets of metal are cold-formed using a rolling process to induce a defined strain-hardening state in the material and then joined in various combinations. As the degree of deformation increases, the rolling of samples can lead to minimal accumulation of damage in the sheet materials, which can influence the joint behaviour. The rolling process, as well as the subsequent joining process, are also investigated by FEM. The influence of pre-rolled semi-finished products on the strength of the SPR joints is investigated.</jats:p>}},
  author       = {{Schlichter, Malte Christian and Harabati, Özcan and Ludwig, Jean-Patrick and Böhnke, Max and Bielak, Christian Roman and Bobbert, Mathias and Meschut, Gerson}},
  booktitle    = {{Materials Research Proceedings}},
  issn         = {{2474-395X}},
  publisher    = {{Materials Research Forum LLC}},
  title        = {{{Experimental and numerical investigation of the influence of rolling-induced sheet metal deformation on SPR joints}}},
  doi          = {{10.21741/9781644903599-148}},
  volume       = {{54}},
  year         = {{2025}},
}

@book{66427,
  author       = {{Beule, Felix}},
  isbn         = {{9783819103308}},
  publisher    = {{Shaker Verlag}},
  title        = {{{Methodenentwicklung zur Prognose der richtungsabhängigen Eigenschaftsänderungen von Klebverbindungen aufgrund von Relativverschiebungen während der Aushärtung}}},
  volume       = {{175}},
  year         = {{2025}},
}

@article{52201,
  author       = {{Han, Daxin and Kappe, Fabian and Vorderbrüggen, Julian and Jendrny, Jörg and Gorr, Eugen and Meschut, Gerson}},
  issn         = {{1526-6125}},
  journal      = {{Journal of Manufacturing Processes}},
  keywords     = {{Industrial and Manufacturing Engineering, Management Science and Operations Research, Strategy and Management}},
  pages        = {{92--108}},
  publisher    = {{Elsevier BV}},
  title        = {{{Single-step self-punching lockbolt process for aluminum sheets without pre-hole}}},
  doi          = {{10.1016/j.jmapro.2024.02.043}},
  volume       = {{116}},
  year         = {{2024}},
}

@inproceedings{52215,
  author       = {{Carillo Beber, Vinicius and Fernandes, Pedro and Nagel, Christof and Köster, Christian and Matzenmiller, Anton and Hecht, Mathias and Baumgartner, Jörg and Melz, Tobias and Tews, Karina and Çavdar, Serkan and Meschut, Gerson}},
  booktitle    = {{24. Kolloquium: Gemeinsame Forschung in der Klebtechnik}},
  location     = {{Köln}},
  title        = {{{Lebensdauerprognose für Stahlklebverbindungen bei multiaxialer Belastung mit Phasenverschiebung, veränderlicher Mittelspannung und variablen Amplituden}}},
  year         = {{2024}},
}

@inproceedings{52212,
  author       = {{Tews, Karina and Teutenberg, Dominik and Meschut, Gerson and Buczek, Moritz and Duffe, Tobias and Kullmer, Gunter}},
  booktitle    = {{24. Kolloquium: Gemeinsame Forschung in der Klebtechnik}},
  location     = {{Köln}},
  title        = {{{Bruchmechanisches Schnittebenenkonzept zur lebensdauergerechten Auslegung von hyperelastischen Klebverbindungen bei multiaxialen und variablen Belastungsamplituden}}},
  year         = {{2024}},
}

@inproceedings{52359,
  author       = {{Chudalla, Nick and Schmolke, Tobias and Meschut, Gerson and Spohr, Sebastian and Eckstein, Lutz and Brunner-Schwer, Christian and Rethmeier, Michael and Nothelfer-Richter, Rolf and Hilt, MIchael}},
  booktitle    = {{24. Kolloquium: Gemeinsame Forschung in der Klebtechnik}},
  location     = {{Köln}},
  title        = {{{Konzeptentwicklung für ein Stahlbatteriegehäuse unter besonderer Berücksichtigung der Fügetechnik und des Korrosionsschutzes}}},
  year         = {{2024}},
}

@article{50726,
  abstract     = {{<jats:p>Resistance spot‐welded joints containing press‐hardened steels are seen to exhibit a fracture mode called total dome failure, where the weld nugget completely separates from one steel sheet along the weld nugget edge. The effect of weld nugget shape and material property gradients is studied based on damage mechanics modeling and experimental validation to shed light on the underlying influencing factors. For a three‐steel‐sheet spot‐welded joint combining DP600 (1.5 mm)–CR1900T (1.0 mm)–CR1900T (1.0 mm), experiments under shear loading reveal that fracture occurs in the DP600 sheet along the weld nugget edge. In subsequent numerical simulation studies with damage mechanics models whose parameters are independently calibrated for every involved material configuration, three variations of the geometrical joint configuration are considered—an approximation of the real joint, one variation with a steeper weld nugget shape, and one variation with a less pronounced gradient between weld nugget material and heat‐affected zone material properties. The results of the finite‐element simulations show that a shallower weld nugget and a more pronounced material gradient lead to a faster increase of plastic strain at the edge of the weld nugget and promote the occurrence of total dome failure.</jats:p>}},
  author       = {{Schuster, Lilia and Olfert, Viktoria and Sherepenko, Oleksii and Fehrenbach, Clemens and Song, Shiyuan and Hein, David and Meschut, Gerson and Biro, Elliot and Münstermann, Sebastian}},
  issn         = {{1611-3683}},
  journal      = {{steel research international}},
  keywords     = {{Materials Chemistry, Metals and Alloys, Physical and Theoretical Chemistry, Condensed Matter Physics}},
  publisher    = {{Wiley}},
  title        = {{{Influences of Weld Nugget Shape and Material Gradient on the Shear Strength of Resistance Spot‐Welded Joints}}},
  doi          = {{10.1002/srin.202300530}},
  year         = {{2024}},
}

@inproceedings{54142,
  author       = {{Beule, Felix and Al Trjman, Mohamad and Teutenberg, Dominik and Meschut, Gerson}},
  location     = {{Shanghai}},
  title        = {{{Method development (modelling, simulation, characterisation) in adhesive bonding technology}}},
  year         = {{2024}},
}

@inproceedings{54240,
  author       = {{Gilich, Julian and Meschut, Gerson and Gröger, Benjamin and Wiebicke, Felix and Koch, Ilja and Gude, Maik}},
  booktitle    = {{14. Doktorandenseminar Klebtechnik}},
  location     = {{Kassel}},
  title        = {{{Experimentelle und numerische Analyse des Fließverhaltens von hochviskosen Wärmeleitstoffen im Fertigungsprozess}}},
  year         = {{2024}},
}

@inproceedings{56087,
  author       = {{Beule, Felix and Teutenberg, Dominik and Meschut, Gerson}},
  booktitle    = {{The 16th International Conference on the Science and Technology of Adhesion and Adhesives}},
  location     = {{Oxford, UK}},
  title        = {{{Numerical modelling of the influence of viscous fingering on the mechanical properties of structural adhesive joints}}},
  year         = {{2024}},
}

@article{54847,
  abstract     = {{The widespread adoption of ultra-high strength steels, due to their high bulk resistivity, intensifies expulsion issues in resistance spot welding (RSW), deteriorating both the spot weld and surface quality. This study presents a novel approach to prevent expulsion by employing a preheating current. Through characteristic analysis of joint formation under critical welding current, the importance of plastic material encapsulation around the weld nugget (plastic shell) at high temperatures in preventing expulsion is highlighted. To evaluate the effect of preheating on the plastic shell and understand its mechanism in expulsion prevention, a two-dimensional welding simulation model for dissimilar ultra-high strength steel joints was established. The results showed that optimal preheating enhances the thickness of the plastic shell, improving its ability to encapsulate the weld nugget during the primary welding phase, thereby diminishing expulsion risks. Experimental validation confirmed that by employing the optimal preheating current, the maximum nugget diameter was enhanced to 9.42 mm, marking an increase of 13.4 % and extending the weldable current range by 27.5 %. Under quasi-static cross-tensile loading, joints with preheating demonstrated a 7.9 % enhancement in maximum load-bearing capacity compared to joints without preheating, showing a reproducible and complete pull-out failure mode within the heat-affected zone. This study offers a prevention method based on underlying mechanisms, providing a new perspective for future research on welding parameter optimization with the aim of expulsion prevention.}},
  author       = {{Yang, Keke and El-Sari, Bassel and Olfert, Viktoria and Wang, Zhuoqun and Biegler, Max and Rethmeier, Michael and Meschut, Gerson}},
  issn         = {{1526-6125}},
  journal      = {{Journal of Manufacturing Processes}},
  keywords     = {{Expulsion Resistance spot welding Finite element modelling Preheating Weldable current range Ultra-high strength steel}},
  pages        = {{489--502}},
  publisher    = {{Elsevier BV}},
  title        = {{{Expulsion prevention in resistance spot welding of dissimilar joints with ultra-high strength steel: An analysis of the mechanism and effect of preheating current}}},
  doi          = {{10.1016/j.jmapro.2024.06.034}},
  volume       = {{124}},
  year         = {{2024}},
}

@inproceedings{56682,
  author       = {{Einwag, Jonathan-Markus and Goetz, Stefan and Wartzack, Sandro}},
  booktitle    = {{DS 133: Proceedings of the 35th Symposium Design for X (DFX2024)}},
  publisher    = {{The Design Society}},
  title        = {{{Approach for the Reliable and Virtual Design of Mechanical Joints in an Uncertain Environment}}},
  doi          = {{10.35199/dfx2024.23}},
  year         = {{2024}},
}

@article{58348,
  abstract     = {{<jats:p> Clinching is a mechanical joining technology, in which a mainly form-fit joint is created by means of local cold forming. To characterize the load-bearing behavior of such joints, they are typically analyzed destructively, for example by tensile-shear tests in combination with metallographic sections. However, both the initiation and progress of failure can only be described to a limited extent by this method. Furthermore, these tests allow only limited conclusions about clinch points under in-service loading. More purposefully, clinch points can be analyzed nondestructively by combining in-situ computed tomography (CT) and transient dynamic analysis (TDA). The TDA continuously measures the dynamic behavior of the specimen and indicates failure events like crack initiation, which then can be evaluated thoroughly by stopping the test and performing a CT scan. To qualify the TDA for this task, it is necessary to link the observed damage behavior with specific dynamic characteristics. In this work, the complementation of in-situ CT and TDA is investigated by testing a clinched single-lap tensile-shear specimen made of aluminum. The testing procedure is stepwise: at certain displacement levels, the specimen is investigated by in-situ CT and TDA. While the in-situ CT provides the location, extent, and development of the failure phenomena, the TDA uses this information to evaluate the dynamic signal and detect relevant frequency ranges, which indicate damage events. The results demonstrate, that failure initiation and progression can be analyzed efficiently by combining both measuring systems. The TDA reliably detects relevant signal changes in the monitored frequency band. By means of in-situ computed tomography, the corresponding failure phenomena can be described in detail, enhancing the understanding of the load-bearing and deformation behavior of clinch points. The concatenation of characteristic signal changes and observed failure phenomena can henceforth be transferred to analyze complex structures during operation nondestructively by TDA. </jats:p>}},
  author       = {{Reschke, Gregor and Köhler, Daniel and Kupfer, Robert and Troschitz, Juliane and Gude, Maik and Brosius, Alexander}},
  issn         = {{0954-4089}},
  journal      = {{Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering}},
  keywords     = {{Clinching, Non-destructive testing, Transient Dynamic Analysis}},
  publisher    = {{SAGE Publications}},
  title        = {{{In-situ computed tomography and transient dynamic analysis – failure analysis of a single-lap tensile-shear test with clinch points}}},
  doi          = {{10.1177/09544089241251646}},
  year         = {{2024}},
}

@inproceedings{58382,
  author       = {{Striewe, Marius and Bähr, Philipp and Meschut, Gerson and Hein, David and Sommer, Silke}},
  booktitle    = {{14. Kolloquium: Gemeinsame Forschung in der Mechanischen Fügetechnik}},
  title        = {{{Ersatzmodellentwicklung zur Berücksichtigung der lokalen Fügeelementkinematik in mechanisch gefügten Verbindungen für die Bauteilauslegung im stahlintensiven Karosseriebau}}},
  year         = {{2024}},
}

@book{58403,
  author       = {{Mayer, Bernd and Nagel, Christof and Fernandes, Pedro Henrique Evangelista and Matzenmiller, Anton and Köster, Christian and Melz, Tobias and Baumgartner, Jörg and Hecht, Matthias and Tews, Karina and Çavdar, Serkan and Meschut, Gerson}},
  publisher    = {{Forschungsvereinigung Stahlanwendung e.V.}},
  title        = {{{Lebensdauerprognose für Stahlklebverbindungen bei multiaxialer Belastung mit Phasenverschiebung, veränderlicher Mittelspannung und variablen Amplituden}}},
  volume       = {{1427}},
  year         = {{2024}},
}

@inproceedings{52216,
  author       = {{Tews, Karina and Teutenberg, Dominik and Meschut, Gerson}},
  booktitle    = {{DECHEMA Workshop für Klebstoffanwender: Simulation von Klebverbindungen}},
  location     = {{Köln}},
  title        = {{{Mechanisches Verhalten: Charakterisierung von Klebstoffen}}},
  year         = {{2024}},
}

@unpublished{58441,
  abstract     = {{This study presents a numerical approach using a 3D finite element model to quantify the remaining clamp load of a plastic nut joint after a specific time. The viscoelastic relaxation of a thermoplastic nut, which is predominantly screwed on a welding stud, is described by a material card using Prony Series. Prony Series are derived from experimental Dynamical Mechanical Analysis with different moisture and fiber contents of the thermoplastic. Since plastic nuts usually do not have preformed threads, the increased temperatures and resulting stresses from the thread-forming process are considered in the simulation. Firstly, the FE model is verified by substrate stress relaxation tests. Subsequently, experimental clamp load measurements with miniature compression load cells verify the clamp load prediction. Finally, the developed model is used to analyze the clamp load distribution within the threads}},
  author       = {{Wippermann, Jan and Meschut, Gerson}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Numerical modeling of clamp load relaxation of plastic nuts under varying moisture and fiber content}}},
  year         = {{2024}},
}

@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}},
}