@article{35754, author = {{Stutz, Bianca and Buyken, Anette and Schadow, A.M. and Jankovic, N. and Alexy, U. and Krueger, B.}}, issn = {{0195-6663}}, journal = {{Appetite}}, keywords = {{Nutrition and Dietetics, General Psychology}}, publisher = {{Elsevier BV}}, title = {{{Associations of chronotype and social jetlag with eating jetlag and their changes among German students during the first COVID-19 lockdown. The Chronotype and Nutrition study}}}, doi = {{10.1016/j.appet.2022.106333}}, volume = {{180}}, year = {{2022}}, } @article{35310, author = {{Goletzke, J and Weber, KS and Kössler, T and Zaharia, OP and Bódis, K and Müssig, K and Szendroedi, J and Burkart, V and Stutz, Bianca and Nöthlings, U and Buyken, Anette and Roden, M and Group, GDS}}, issn = {{0939-4753}}, journal = {{Nutr Metab Cardiovasc Dis}}, number = {{10}}, pages = {{2310--2320}}, title = {{{Relative validity of a glycemic index extended food-frequency questionnaire.}}}, volume = {{32}}, year = {{2022}}, } @inproceedings{40267, author = {{Depenbusch, Sarah and Schürmann, Mirko and Schaper, Niclas and Seifert, Andreas and Schumacher, Jan-Philip and Straatmann, Tammo}}, location = {{Glasgow}}, title = {{{Effects of Digital Transformation on Job Satisfaction and Employee Retention: An Integrative Framework}}}, year = {{2022}}, } @inproceedings{29853, author = {{Tews, Karina and Aubel, Tobias and Teutenberg, Dominik and Meschut, Gerson and Duffe, Tobias and Kullmer, Gunter}}, booktitle = {{22. Kolloquium: Gemeinsame Forschung in der Klebtechnik}}, title = {{{Methodenentwicklung zur numerischen Lebensdauerprognose von hyperelastischen Klebverbindungen infolge zyklischer Beanspruchung mittels bruchmechanischer Ansätze }}}, year = {{2022}}, } @inproceedings{32305, author = {{Karakaya, Kadiray and Yigitbas, Enes and Engels, Gregor}}, booktitle = {{Proceedings of the 9th International Working Conference on Human-Centered Software Engineering (HCSE'22)}}, publisher = {{Springer}}, title = {{{Automated UX Evaluation for User-Centered Design of VR Interfaces}}}, year = {{2022}}, } @inproceedings{30153, author = {{Schmolke, Tobias and Teutenberg, Dominik and Meschut, Gerson and Meinderink, Dennis and Golebiowska, Sandra and Rieker, Florian and Ebbert, Christoph and Grundmeier, Guido}}, location = {{Online}}, title = {{{Entwicklung einer Methode zur Bewertung einer stahlintensiven Mischbau-Klebverbindung eines Batteriegehäuses gegenüber mechanischer und medialer Belastung unter Berücksichtigung der Interphasenstruktur}}}, year = {{2022}}, } @inproceedings{32309, abstract = {{Due to the increasing influences of a VUCA world, design thinking workshops have been established as a standard technique to build solutions according to uncertain customer needs. Concerning the ongoing pandemic and rising development of solutions across organizations, more and more workshops were conducted online with software support. However, existing software tools insufficiently address the different workshop situations in terms of the process (i.e., fixed tasks to conduct), the place (e.g., static online whiteboards), and people (i.e., synchronous working of all stakeholders). Therefore, we propose a design science study to develop a situation-specific software support that can be configured with flexible development processes, different places, and task-related people. Based on practical experience in existing research projects, we derive the initial design requirements and map them to a set of design principles. Out of that, we design a concept with its implementation as a software tool and point out open challenges. }}, author = {{Gottschalk, Sebastian and Yigitbas, Enes and Nowosad, Alexander and Engels, Gregor}}, booktitle = {{Proceedings of the 5th International Workshop on Software-intensive Business (IWSiB'22) }}, keywords = {{design thinking, situation-specific, cross-organizational, software support}}, publisher = {{ACM}}, title = {{{Towards Situation-specific Software Support for Cross-organizational Design Thinking Processes}}}, year = {{2022}}, } @inproceedings{32308, author = {{Yigitbas, Enes and Krois, Sebastian and Renzelmann, Timo and Engels, Gregor}}, booktitle = {{Proceedings of the 10th International Conference on Serious Games and Applications for Health (SeGAH'22) }}, publisher = {{IEEE}}, title = {{{Comparative Evaluation of AR-based, VR-based, and Traditional Basic Life Support Training}}}, year = {{2022}}, } @article{34224, abstract = {{Crack growth in structures depends on the cyclic loads applied on it, such as mechanical, thermal and contact, as well as residual stresses, etc. To provide an accurate simulation of crack growth in structures, it is of high importance to integrate all kinds of loading situations in the simulations. Adapcrack3D is a simulation program that can accurately predict the propagation of cracks in real structures. However, until now, this three-dimensional program has only considered mechanical loads and static thermal loads. Therefore, the features of Adapcrack3D have been extended by including contact loading in crack growth simulations. The numerical simulation of crack propagation with Adapcrack3D is generally carried out using FE models of structures provided by the user. For simulating models with contact loading situations, Adapcrack3D has been updated to work with FE models containing multiple parts and necessary features such as coupling and surface interactions. Because Adapcrack3D uses the submodel technique for fracture mechanical evaluations, the architecture of the submodel is also modified to simulate models with contact definitions between the crack surfaces. This paper discusses the newly implemented attribute of the program with the help of illustrative examples. The results confirm that the contact simulation in Adapcrack3D is a major step in improving the functionality of the program.}}, author = {{Joy, Tintu David and Weiß, Deborah and Schramm, Britta and Kullmer, Gunter}}, issn = {{2076-3417}}, journal = {{Applied Sciences}}, keywords = {{Fluid Flow and Transfer Processes, Computer Science Applications, Process Chemistry and Technology, General Engineering, Instrumentation, General Materials Science}}, number = {{15}}, publisher = {{MDPI AG}}, title = {{{Further Development of 3D Crack Growth Simulation Program to Include Contact Loading Situations}}}, doi = {{10.3390/app12157557}}, volume = {{12}}, year = {{2022}}, } @inproceedings{42874, author = {{Göddecke, Johannes and Meschut, Gerson and Göhrs, Tim and Große Gehling, Manfred}}, location = {{Webkonferenz}}, title = {{{Methodenentwicklung zur Auslegung geklebter Verbindungen aus hochfestem Stahl unter Berücksichtigung betriebsrelevanter Beanspruchungen im Landmaschinen- und Anlagenbau}}}, year = {{2022}}, } @inproceedings{33515, author = {{Buschek, Daniel and Hauptmann, Hanna and Heuer, Hendrik and Loepp, Benedikt and Riener, Andreas and Yigitbas, Enes}}, booktitle = {{Proceedings of the Mensch Und Computer 2022 (MuC ’22) }}, title = {{{UCAI 2022 - 3rd International Workshop on User-Centered Artificial Intelligence}}}, year = {{2022}}, } @inproceedings{39372, author = {{Lange, Sven and Hedayat, Christian and Kuhn, Harald and Hilleringmann, Ulrich}}, booktitle = {{2022 Smart Systems Integration (SSI)}}, publisher = {{IEEE}}, title = {{{Modeling and Characterization of a 3D Environment for the Design of an Inductively Based Locating Method by Coil Couplings}}}, doi = {{10.1109/ssi56489.2022.9901416}}, year = {{2022}}, } @inproceedings{39373, author = {{Lange, Sven and Hedayat, Christian and Kuhn, Harald and Hilleringmann, Ulrich}}, booktitle = {{2022 Smart Systems Integration (SSI)}}, publisher = {{IEEE}}, title = {{{Modeling and Characterization of a 3D Environment for the Design of an Inductively Based Locating Method by Coil Couplings}}}, doi = {{10.1109/ssi56489.2022.9901416}}, year = {{2022}}, } @inproceedings{39375, author = {{Lange, Sven and Hedayat, Christian and Kuhn, Harald and Hilleringmann, Ulrich}}, booktitle = {{2022 Smart Systems Integration (SSI)}}, publisher = {{IEEE}}, title = {{{Modeling and Characterization of a 3D Environment for the Design of an Inductively Based Locating Method by Coil Couplings}}}, doi = {{10.1109/ssi56489.2022.9901416}}, year = {{2022}}, } @inproceedings{44164, author = {{Rehlaender, Philipp and Korthauer, Bastian and Schafmeister, Frank and Böcker, Joachim}}, booktitle = {{2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)}}, location = {{Hannover, Germany}}, pages = {{P.1--P.11}}, title = {{{Experimental Demonstration of a 2.2kW Active-Clamp Converter for High-Current Wide-Voltage-Transfer Ratio Applications}}}, year = {{2022}}, } @inproceedings{44161, author = {{Rehlaender, Philipp and Schafmeister, Frank and Böcker, Joachim}}, booktitle = {{2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)}}, location = {{Hannover, Germany}}, pages = {{1--9}}, title = {{{Phase-Shift Modulation for Flying-Capacitor DC-DC Converters}}}, year = {{2022}}, } @inbook{34210, abstract = {{The application of the mechanical joining process clinching enables the joining of sheet metals with a wide range of material-thickness configurations, which is of interest in lightweight construction of multi-material structures. Each material-thickness combination results in a joint with its own property profile that is affected differently by variations. Manufacturing process-related effects from preforming steps influence the geometric shape of a clinched joint as well as its load-bearing capacity. During the clinching process high degrees of plastic strain, increased temperatures and high strain rates occur. In this context, a 3D numerical model was developed which can represent the material-specific behaviour during the process chain steps sheet metal forming, joining, and loading phase in order to achieve a high predictive accuracy of the simulation. Besides to the investigation of the prediction accuracy, the extent of the influence of individual modelling aspects such as temperature and strain rate dependency is examined.}}, author = {{Bielak, Christian Roman and Böhnke, Max and Bobbert, Mathias and Meschut, Gerson}}, booktitle = {{The Minerals, Metals & Materials Series}}, isbn = {{9783031062117}}, issn = {{2367-1181}}, publisher = {{Springer International Publishing}}, title = {{{Development of a Numerical 3D Model for Analyzing Clinched Joints in Versatile Process Chains}}}, doi = {{10.1007/978-3-031-06212-4_15}}, year = {{2022}}, } @inproceedings{30265, abstract = {{Due to increasing globalization and rising quality requirements, the steel and metal processing industry is facing growing cost and innovation pressure. Not least because of their high lightweight potential, high-strength steel materials are meeting the growing material requirements of steel and metal processing in areas such as aerospace and medical technology. In particular, the tight tolerance limits of applicable shape and dimensional accuracies pose a challenge in the processing of high-strength steel strip materials. Improving the processability of high-strength steel materials through the use of straighteners with set-up assistance systems significantly increases the potential for competing with other materials such as aluminum or magnesium alloys. }}, author = {{Bader, Fabian and Bathelt, Lukas and Djakow, Eugen and Henke, Christian and Homberg, Werner and Trächtler, Ansgar}}, location = {{Braga / Portugal}}, title = {{{An approach for an innovative 3d steel strip straightening machine for curvature and saber compensation}}}, doi = {{https://doi.org/10.4028/p-87wvu0}}, year = {{2022}}, } @article{30962, abstract = {{ Clinching as a mechanical joining process has become established in many areas of car body. In order to predict relevant properties of clinched joints and to ensure the reliability of the process, it is numerically simulated during the product development process. The prediction accuracy of the simulated process depends on the implemented friction model. Therefore, a new method for determining friction coefficients in sheet metal materials was developed and tested. The aim of this study is the numerical investigation of this experimental method by means of FE simulation. The experimental setup is modelled in a 3D numerical simulation taking into account the process parameters varying in the experiment, such as geometric properties, contact pressure and contact velocity. Furthermore, the contact description of the model is calibrated via the experimentally determined friction coefficients according to clinch-relevant parameter space. It is shown that the assumptions made in the determination of the experimental data in preliminary work are valid. In addition, it is investigated to what extent the standard Coulomb friction model in the FEM can reproduce the results of the experimental method. }}, author = {{Bielak, Christian Roman and Böhnke, Max and Bobbert, Mathias and Meschut, Gerson}}, issn = {{1464-4207}}, journal = {{Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications}}, keywords = {{Mechanical Engineering, General Materials Science}}, publisher = {{SAGE Publications}}, title = {{{Numerical investigation of a friction test to determine the friction coefficients for the clinching process}}}, doi = {{10.1177/14644207221093468}}, year = {{2022}}, } @article{29951, abstract = {{The components of a body in white consist of many individual thin-walled sheet metal parts, which usually are manufactured in deep-drawing processes. In general, the conditions in a deep-drawing process change due to changing tribology conditions, varying degrees of spring back, or scattering material properties in the sheet blanks, which affects the resulting pre-strain. Mechanical joining processes, especially clinching, are influenced by these process-related pre-strains. The final geometric shape of a clinched joint is affected to a significant level by the prior material deformation when joining with constant process parameters. That leads to a change in the stiffness and force transmission in the clinched joint due to the different geometric dimensions, such as interlock, neck thickness and bottom thickness, which directly affect the load bearing capacity. Here, the influence of the pre-straining in the deep drawing process on the force distribution in clinch points in an automotive assembly is investigated by finite-element models numerically. In further studies, the results are implemented in an optimization tool for designing clinched components. The methodology starts with a pre-straining of metal sheets. This step is followed by 2D rotationally symmetric forming simulations of the joining process. The resulting mesh of each forming simulation is rotated and 3D models are obtained. The clinched joint solid model with pre-strains is used further to determine the joint stiffnesses. With the simulation of the same test set-up with an equivalent point-connector model, the equivalent stiffness for each pre-strain combination is determined. Simulations are performed on a clinched component to assess the influence of pre-strain and sheet thinning on the clinched joint loadings by using the equivalent stiffnesses. The investigations clearly show that for the selected component, the loadings at the clinch points are dependent on the sheet thinning and the stiffnesses due to pre-strain. The magnitude of the influence varies depending on the quantity considered. For example, the shear force is more sensitive to the joint stiffness than to the sheet thinning.}}, author = {{Martin, Sven and Bielak, Christian Roman and Bobbert, Mathias and Tröster, Thomas and Meschut, Gerson}}, issn = {{0944-6524}}, journal = {{Production Engineering}}, keywords = {{Industrial and Manufacturing Engineering, Mechanical Engineering}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Numerical investigation of the clinched joint loadings considering the initial pre-strain in the joining area}}}, doi = {{10.1007/s11740-021-01103-w}}, year = {{2022}}, }