@inproceedings{20852, author = {{Unruh, Eduard and Hein, David and Meschut, Gerson}}, booktitle = {{10. Fügetechnisches Gemeinschaftskolloquium}}, title = {{{Analytische Auslegung der Schwingfestigkeit geclinchter Verbindungen}}}, year = {{2020}}, } @inproceedings{20853, author = {{Bähr, Philipp and Sommer, Silke and Unruh, Eduard and Hein, David and Meschut, Gerson}}, title = {{{Charakterisierung und Modellierung von Kerbeffekten durch Mischverbindungen in Karosseriebauteilen aus höchstfesten Stählen}}}, year = {{2020}}, } @article{20354, author = {{Wiesenmayer, Sebastian and Heyser, Per and Nehls, Thomas and Frey, Philipp and Flügge, Wilko and Meschut, Gerson and Merklein, Marion}}, journal = {{Werkstattstechnik Online}}, number = {{10}}, pages = {{677--683}}, publisher = {{Springer-VDI-Verlag GmbH & Co. KG}}, title = {{{Berücksichtigung der Herstellungshistorie von Blechbauteilen beim Fügen durch Umformen}}}, doi = {{http://dx.doi.org/10.37544/1436-4980-2020-10-33}}, volume = {{110}}, year = {{2020}}, } @article{20678, author = {{Bielak, Christian Roman and Böhnke, Max and Beck, Robert and Bobbert, Mathias and Meschut, Gerson}}, journal = {{Journal of Advanced Joining Processes. }}, keywords = {{Clinching, process simulation, FEM, pre-straining, sensitivity analysis}}, publisher = {{Elsevier}}, title = {{{Numerical analysis of the robustness of clinching process considering the pre-forming of the parts }}}, doi = {{https://doi.org/10.1016/j.jajp.2020.100038}}, year = {{2020}}, } @article{20143, author = {{Otroshi, Mortaza and Rossel, Moritz and Meschut, Gerson}}, journal = {{Journal of Advanced Joining Processes}}, keywords = {{Self-pierce riveting, Ductile fracture, Damage modeling, GISSMO damage model}}, publisher = {{Elsevier}}, title = {{{Stress state dependent damage modeling of self-pierce riveting process simulation using GISSMO damage model}}}, doi = {{10.1016/j.jajp.2020.100015}}, volume = {{1}}, year = {{2020}}, } @misc{20119, booktitle = {{Applied Sciences}}, editor = {{Troschitz, Juliane and Vorderbrüggen, Julian and Kupfer, Robert and Gude, Maik and Meschut, Gerson}}, publisher = {{MDPI}}, title = {{{Joining of Thermoplastic Composites with Metals Using Resistance Element Welding}}}, doi = {{10.3390/app10207251}}, year = {{2020}}, } @inproceedings{20344, author = {{Bielak, Christian Roman and Böhnke, Max and Bobbert, Mathias and Meschut, Gerson}}, location = {{Darmstadt}}, title = {{{Development of a numerical method for analyzing the robustness of clinching in versatile process chains}}}, year = {{2020}}, } @book{20655, author = {{Kowatz, Jannik and Teutenberg, Dominik and Meschut, Gerson}}, isbn = {{978-3-96780-063-0}}, publisher = {{Forschungsvereinigung Stahlanwendung e. V.}}, title = {{{P 1221 - Auslegungsmethode für zyklisch beanspruchte Stahl/CFK-Klebverbindungen unter besonderer Berücksichtigung des Rissfortschritts}}}, volume = {{P 1221}}, year = {{2020}}, } @inproceedings{21626, author = {{Haak, Viktor and Meschut, Gerson and Lotte, Jens and Reisgen, Uwe}}, booktitle = {{10. Fügetechnisches Gemeinschaftskolloquium}}, location = {{Rostock}}, title = {{{Einseitiges Widerstandselementschweißen für die stahlintensive Mischbauweise}}}, year = {{2020}}, } @book{36835, author = {{Neumann, Stefan and Meschut, Gerson and Fromm, Andreas and Maier, Hans Jürgen}}, isbn = {{978-3-86776-593-0}}, title = {{{Innovative Mischbauweisen mit dünnwandigen Aluminiumdruckguss-Strukturen mittels Bolzensetzen und fließlochformenden Schrauben}}}, year = {{2020}}, } @book{36836, author = {{Neumann, Stefan and Meschut, Gerson and Schmatz, Frederik and Flüge, Wilko}}, isbn = {{978-3-86776-601-2}}, title = {{{Robotergestütztes manuelles mechanisches Fügen}}}, doi = {{Robotergestütztes manuelles mechanisches Fügen}}, year = {{2020}}, } @inproceedings{20680, author = {{Kappe, Fabian and Wituschek, Simon and Lechner, Michael and Bobbert, Mathias and Meschut, Gerson and Merklein, Marion}}, location = {{Darmstadt }}, title = {{{Investigation of influencing parameters on the joint formation of the self-piercing riveting process}}}, year = {{2020}}, } @proceedings{19976, abstract = {{The aim to reduce pollutant emission has led to a trend towards lightweight construction in car body development during the last years. As a consequence of the resulting need for multi-material design, mechanical joining technologies become increasingly important. Mechanical joining allows for the combination of dissimilar materials, while thermic joining techniques reach their limits. Self-piercing riveting enables the joining of dissimilar materials by using semi-tubular rivets as mechanical fasteners. The rivet production, however, is costly and time-consuming, as the rivets generally have to be hardened, tempered and coated after forming, in order to achieve an adequate strength and corrosion resistance. A promising approach to improve the efficiency of the rivet manufacturing is the use of high-strength high nitrogen steel as rivet material because these additional process steps would not be necessary anymore. As a result of the comparatively high nitrogen content, such steels have various beneficial properties like higher strength, good ductility and improved corrosion resistance. By cold bulk forming of high nitrogen steels high-strength parts can be manufactured due to the strengthening which is caused by the high strain hardening. However, high tool loads thereby have to be expected and are a major challenge during the production process. Consequently, there is a need for appropriate forming strategies. This paper presents key aspects concerning the process design for the manufacturing of semi-tubular self-piercing rivets made of high-strength steel. The aim is to produce the rivets in several forming stages without intermediate heat treatment between the single stages. Due to the high strain hardening of the material, a two stage forming concept will be investigated. Cup-backward extrusion is chosen as the first process step in order to form the rivet shank without forming the rivet foot. Thus, the strain hardening effects in the area of the rivet foot are minimized and the tool loads during the following process step can be reduced. During the second and final forming stage the detailed geometry of the rivet foot and the rivet head is formed. In this context, the effect of different variations, for example concerning the final geometry of the rivet foot, on the tool load is investigated using multistage numerical analysis. Furthermore, the influence of the process temperature on occurring stresses is analysed. Based on the results of the investigations, an adequate forming strategy and a tool concept for the manufacturing of semi-tubular self-piercing rivets made of high-strength steel are presented.}}, editor = {{Kuball, Clara-Maria and Uhe, Benedikt and Meschut, Gerson and Merklein, Marion}}, keywords = {{high nitrogen steel, self-piercing riveting, joining by forming, bulk forming, tool design}}, pages = {{280--285}}, title = {{{Process design for the forming of semi-tubular self-piercing rivets made of high nitrogen steel}}}, doi = {{10.1016/j.promfg.2020.08.052}}, volume = {{50}}, year = {{2020}}, } @article{19973, abstract = {{As a result of lightweight design, increased use is being made of high-strength steel and aluminium in car bodies. Self-piercing riveting is an established technique for joining these materials. The dissimilar properties of the two materials have led to a number of different rivet geometries in the past. Each rivet geometry fulfils the requirements of the materials within a limited range. In the present investigation, an improved rivet geometry is developed, which permits the reliable joining of two material combinations that could only be joined by two different rivet geometries up until now. Material combination 1 consists of high-strength steel on both sides, while material combination 2 comprises aluminium on the punch side and high-strength steel on the die side. The material flow and the stress and strain conditions prevailing during the joining process are analysed by means of numerical simulation. The rivet geometry is then improved step-by-step on the basis of this analysis. Finally, the improved rivet geometry is manufactured and the findings of the investigation are verified in experimental joining tests.}}, author = {{Uhe, Benedikt and Kuball, Clara-Maria and Merklein, Marion and Meschut, Gerson}}, journal = {{Production Engineering}}, keywords = {{Self-piercing riveting, Joining technology, Rivet geometry, Multi-material design, High-strength steel, Aluminium}}, pages = {{417--423}}, title = {{{Improvement of a rivet geometry for the self-piercing riveting of high-strength steel and multi-material joints}}}, doi = {{10.1007/s11740-020-00973-w}}, volume = {{14}}, year = {{2020}}, } @proceedings{19974, abstract = {{Due to the trend towards lightweight design in car body development mechanical joining technologies become increasingly important. These techniques allow for the joining of dissimilar materials and thus enable multi-material design, while thermic joining methods reach their limits. Semi-tubular self-piercing riveting is an important mechanical joining technology. The rivet production, however, is costly and time-consuming, as the process consists of several process steps including the heat treatment and coating of the rivets in order to achieve an adequate strength and corrosion resistance. The use of high nitrogen steel as rivet material leads to the possibility of reducing process steps and hence increasing the efficiency of the process. However, the high tool loads being expected due to the high strain hardening of the material are a major challenge during the rivet production. Thus, there is a need for appropriate forming strategies, such as the manufacturing of the rivets at elevated temperatures. Prior investigations led to the conclusion that forming already at 200 °C results in a distinct reduction of the yield strength. To create a deeper understanding of the forming behaviour of high nitrogen steel at elevated temperatures, compression tests were conducted in a temperature range between room temperature and 200 °C. The determined true stress – true strain curves are the basis for the further process and tool design of the rivet production. Another key factor for the rivet manufacturing at elevated temperatures is the influence of the process temperature on the tribological conditions. For this reason, ring compression tests at room temperature and 200 °C are carried out. The friction factors are determined on the basis of calibration curves resulting from the numerical analysis of the ring compression process. The investigations indicate that the friction factor at 200 °C is significantly higher compared to room temperature. This essential fact has to be taken into account for the process and tool design for the rivet production using high nitrogen steel.}}, editor = {{Kuball, Clara-Maria and Jung, R and Uhe, Benedikt and Meschut, Gerson and Merklein, Marion}}, keywords = {{High nitrogen steel, Self-piercing riveting, Joining by forming, Bulk forming, Strain hardening}}, title = {{{Influence of the process temperature on the forming behaviour and the friction during bulk forming of high nitrogen steel}}}, doi = {{10.1016/j.jajp.2020.100023}}, volume = {{1}}, year = {{2020}}, } @article{19748, author = {{Ditter, Jan and Meschut, Gerson and Wibbeke, Tim Michael}}, journal = {{adhesion ADHESIVES + SEALANTS}}, number = {{3}}, pages = {{12--16}}, title = {{{Joining and Disjoining Concepts for Adhesive Bonded Lightweight Structures}}}, year = {{2019}}, } @article{19749, author = {{Meschut, Gerson and Meyer, Sebastian and Ditter, Jan and Schmal, Christopher }}, journal = {{lightweight.design }}, number = {{3}}, title = {{{Fügetechniken für die Herstellung von Hybridbauteilen }}}, year = {{2019}}, } @article{19750, author = {{Meschut, Gerson and Meyer, Sebastian and Ditter, Jan and Schmal, Christopher}}, journal = {{lightweight.design worldwide}}, number = {{3}}, title = {{{Joining Technologies for the Production of Hybrid Components}}}, year = {{2019}}, } @article{19751, author = {{Ditter, Jan and Meschut, Gerson and Wibbeke, Tim Michael}}, journal = {{Schweißen und Schneiden}}, number = {{6}}, title = {{{Analyse von Reparaturschweißverfahren für pressgehärtete Stähle in der Karosserieinstandsetzung }}}, volume = {{71}}, year = {{2019}}, } @article{19752, author = {{Ditter, Jan and Aubel, Tobias and Teutenberg, Dominik and Meschut, Gerson}}, journal = {{Adhäsion Kleben&Dichten}}, number = {{1-2}}, title = {{{Einfache Ermittlung von Schnellhärtungsparametern für elementar geklebte Strukturen }}}, year = {{2019}}, }