@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}}, } @phdthesis{42754, author = {{Hader, Christoph}}, isbn = {{978-3-8440-7302-7}}, title = {{{Beitrag zur Steigerung der Qualität von Aluminium-Lichtbogen-Bolzenschweißverbindungen mit Hubzündung}}}, year = {{2020}}, } @phdthesis{42756, author = {{Porsch, Tony}}, isbn = {{978-3-8440-7382-9}}, title = {{{Ersatzmodellentwicklung zur Prognose des kerbinduzierten Fügeteilversagens von Halbhohlstanznietverbindungen unter Crashbelastung}}}, year = {{2020}}, } @phdthesis{42755, author = {{Pietsch, Tommy}}, isbn = {{978-3-8440-7128-3}}, title = {{{Entwicklung des Prägeelementschweißens für Aluminium-Stahl-Verbindungen im Karosseriebau}}}, year = {{2020}}, } @phdthesis{42757, author = {{Sierak, Paulina}}, isbn = {{978-3-8440-7380-5}}, title = {{{Qualifizierung intelligenter Datenanalysemethoden bei vollautomatisierten Klebtechnikanwendungen}}}, year = {{2020}}, } @phdthesis{42758, author = {{Gerkens, Michael}}, isbn = {{978-3-8440-7583-0}}, title = {{{Entwicklung einer Methodik zur numerischen Simulation des Hochgeschwindigkeits-Bolzensetzens}}}, year = {{2020}}, } @article{43160, abstract = {{Refill friction stir spot welding (RFSSW) is a highly flexible and promising solid-state joining method for aluminium alloys. Alternatively, resistance spot welding (RSW) can be stated as an appropriate joining method which can be automated and used within a high-volume production due to short process times. Both processes do not need any additional elements and a flat surface on both sides of the joints can be realised. In order to meet the modern requirements for crash safety and structural stiffness, thermal and mechanical joining methods are mainly combined by using single-component epoxy resin adhesives. Due to an insufficient knowledge about the application of both thermal joining methods for the abovementioned material combinations combined with additional adhesives, deeper investigations were done regarding the interactions of the polymers and the joining processes. Starting with a brief presentation of the boundary conditions of the investigations and the refill friction stir spot welding and resistance spot welding of high-strength aluminium alloys with sheet thicknesses bigger than 5.8 mm, the paper introduces the process-related joint properties of friction-based and resistance-based welded joints. Afterwards, the paper discusses the influences of the process parameter on the metallographic joint formation and load-bearing capacities for a selected two-sheet and four-sheet material combination. When combining the spot welding technologies with adhesives, the process parameters of the RFSSW process have to be adapted for the two-sheet combination by adding a squeeze-out step, while for RSW, just the preholding time has to be increased. Different challenges for both joining methods are shown. For RFSSW, the gap formation has to be considered when welding big total sheet thicknesses, while for RSW, the shape of the weld nugget is more important for an appropriate joint performance. Additionally, process optimisations for less adhesive incineration will be discussed for both joining processes, and the influences of the adhesive on the joint formation will be addressed with the help of load-bearing capacity evaluations. The paper closes with specific recommendations for the realisation of refill friction stir and resistance spot-welded joints with and without adhesive in the field of Al joints with big total sheet thicknesses which meet the quality demands and an outlook for further research steps will be given.}}, author = {{Schmal, Christopher and Meschut, Gerson}}, issn = {{0043-2288}}, journal = {{Welding in the World}}, keywords = {{Metals and Alloys, Mechanical Engineering, Mechanics of Materials}}, number = {{9}}, pages = {{1471--1480}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Refill friction stir spot and resistance spot welding of aluminium joints with large total sheet thicknesses (III-1965-19)}}}, doi = {{10.1007/s40194-020-00922-2}}, volume = {{64}}, year = {{2020}}, } @article{43162, abstract = {{Monitoring systems for machines, plants, materials and equipment are increasingly used in production processes. These online condition monitoring systems can detect damage or excessive loads at an early stage and can drastically reduce or prevent long downtimes of plants and machines as well as high repair and maintenance costs. This paper depicts a method for online crack detection with pattern recognition methods for specimens joined by self-pierce riveting under cyclic load in fatigue tests (laboratory application). A software specially conceived for this application was developed. This software, AnrissMF, uses active acoustic testing with a structure-borne sensor to detect cracks in the joints at a very early stage. It is shown in this paper that this software can detect cracks much earlier than classical failure criteria for joints (i. e. before any drop in stiffness or frequency is observed). Furthermore, the successful application of software AnrissMF for online crack detection during the fatigue strength test is presented.}}, author = {{Gollnick, Maik and Giese, Patrick and Hein, David and Meschut, Gerson and Herfert, Daniel}}, issn = {{2195-8572}}, journal = {{Materials Testing}}, keywords = {{Mechanical Engineering, Mechanics of Materials, General Materials Science}}, number = {{9}}, pages = {{877--882}}, publisher = {{Walter de Gruyter GmbH}}, title = {{{Early stage crack detection in mechanically joined steel/aluminum joints by condition monitoring}}}, doi = {{10.3139/120.111558}}, volume = {{62}}, year = {{2020}}, } @article{43161, author = {{Schmal, Christopher and Meschut, Gerson}}, issn = {{0043-2288}}, journal = {{Welding in the World}}, keywords = {{Metals and Alloys, Mechanical Engineering, Mechanics of Materials}}, number = {{3}}, pages = {{437--448}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Process characteristics and influences of production-related disturbances in resistance element welding of hybrid materials with steel cover sheets and polymer core}}}, doi = {{10.1007/s40194-019-00842-w}}, volume = {{64}}, 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}}, } @article{45072, author = {{Ditter, Jan and Aubel, Tobias and Meschut, Gerson}}, issn = {{2192-2624}}, journal = {{adhesion ADHESIVES + SEALANTS}}, keywords = {{Polymers and Plastics, General Chemical Engineering, General Chemistry}}, number = {{1}}, pages = {{30--35}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Simple Determination of Fast Curing Parameters for Bonded Structures}}}, doi = {{10.1007/s35784-020-0031-2}}, volume = {{17}}, year = {{2020}}, } @article{45077, author = {{Ditter, Jan and Meschut, Gerson and Wibbeke, Tim Michael}}, issn = {{2192-2624}}, journal = {{adhesion ADHESIVES + SEALANTS}}, keywords = {{Polymers and Plastics, General Chemical Engineering, General Chemistry}}, number = {{3}}, pages = {{12--17}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Joining and Disjoining Concepts for Adhesive Bonded Lightweight Structures}}}, doi = {{10.1007/s35784-019-0016-1}}, volume = {{16}}, year = {{2020}}, } @article{51203, author = {{Köhler, Daniel and Kupfer, Robert and Gude, Maik}}, issn = {{2666-3309}}, journal = {{Journal of Advanced Joining Processes}}, keywords = {{Mechanical Engineering, Mechanics of Materials, Engineering (miscellaneous), Chemical Engineering (miscellaneous)}}, publisher = {{Elsevier BV}}, title = {{{Clinching in in-situ CT—A numerical study on suitable tool materials}}}, doi = {{10.1016/j.jajp.2020.100034}}, volume = {{2}}, 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}}, }