@article{32814, author = {{Wu, T. and Degener, S. and Tinkloh, Steffen Rainer and Liehr, A. and Zinn, W. and Nobre, J.P. and Tröster, Thomas and Niendorf, T.}}, issn = {{0263-8223}}, journal = {{Composite Structures}}, keywords = {{Civil and Structural Engineering, Ceramics and Composites}}, publisher = {{Elsevier BV}}, title = {{{Characterization of residual stresses in fiber metal laminate interfaces - A combined approach applying hole-drilling method and energy-dispersive X-ray diffraction}}}, doi = {{10.1016/j.compstruct.2022.116071}}, 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}}, } @article{32813, author = {{Martin, Sven and Kurtusic, Kristijan and Tröster, Thomas}}, journal = {{Key Engineering Materials}}, location = {{Braga}}, title = {{{Influence of the Surrounding Sheet Geometry on a Clinched Joint}}}, doi = {{ https://doi.org/10.4028/p-09md1c}}, volume = {{927}}, year = {{2022}}, } @article{29948, author = {{Brüning, Florian and Schöppner, Volker}}, journal = {{Polymers 14}}, keywords = {{Computing Resources Provided by the Paderborn Center for Parallel Computing}}, title = {{{Numerical Simulation of Solids Conveying in Grooved Feed Sections of Single Screw Extruders}}}, doi = {{https://doi.org/10.3390/polym14020256}}, year = {{2022}}, } @article{34708, author = {{Schöppner, Volker and Gevers, Karina and Tornede, A. and Wever, M. and Hüllermeier, E.}}, journal = {{Welding in the World}}, pages = {{14}}, title = {{{A comparison of heuristic, statistical, and machine learning methods for heated tool butt welding of two different materials}}}, year = {{2022}}, } @article{34739, author = {{Moritzer, Elmar and Held, Christian and Hillemeyer, J.}}, issn = {{0043-2288}}, journal = {{Welding in the World}}, title = {{{Material-specific prediction of the optimal joinig parameters for the screw blind rivet joining process}}}, year = {{2022}}, } @article{32869, abstract = {{The further development of in-mold-assembly (IMA) technologies for structural hybrid components is of great importance for increasing the economic efficiency and thus the application potential. This paper presents an innovative IMA process concept for the manufacturing of bending loaded hybrid components consisting of two outer metal belts and an inner core structure made of glass mat reinforced thermoplastic (GMT). In this process, the core structure, which is provided with stiffening ribs and functional elements, is formed and joined to two metal belts in one single step. For experimental validation of the concept, the development of a prototypic molding tool and the manufacturing of hybrid beams including process parameters are described. Three-point bending tests and optical measurement technologies are used to characterize the failure behavior and mechanical properties of the produced hybrid beams. It was found that the innovative IMA process enables the manufacturing of hybrid components with high energy absorption and low weight in one step. The mass-specific energy absorption is increased by 693 % compared to pure GMT beams.}}, author = {{Stallmeister, Tim and Tröster, Thomas}}, issn = {{1662-9795}}, journal = {{Key Engineering Materials}}, keywords = {{Mechanical Engineering, Mechanics of Materials, General Materials Science}}, pages = {{1457--1467}}, publisher = {{Trans Tech Publications, Ltd.}}, title = {{{In-Mold-Assembly of Hybrid Bending Structures by Compression Molding}}}, doi = {{10.4028/p-5fxp53}}, volume = {{926}}, year = {{2022}}, } @inproceedings{33803, author = {{Hanses, Hendrik and Horwath, Ilona}}, booktitle = {{Conference proceedings 38th Danubia Adria Symposium on Advances in Experimental Mechanics}}, editor = {{Kourkoulis, Stavros K.}}, isbn = {{978-618-86278-0-2}}, location = {{Poros}}, title = {{{OPERATIONAL AND DEMAND-ORIENTED FIREFIGHTING EQUIPMENT }}}, year = {{2022}}, } @inproceedings{32871, author = {{Triebus, Marcel and Ostermann, Moritz and Tröster, Thomas and Horwath, Ilona}}, booktitle = {{Materials in Car Body Engineering - Bad Nauheim}}, location = {{Bad Nauheim}}, title = {{{Advanced Automotive Components by Fiber-Metal-Laminates}}}, year = {{2022}}, } @article{31691, abstract = {{Sustainable product engineering is becoming increasingly important. This includes the development of environmentally friendly products and the design for recycling. In this paper a holistic method for the assessment of solution alternatives is presented, in which the stakeholder perspectives along the generic product lifecycle are taken into account. Finally, a new visualization is presented. By visualizing the results in the integrated sustainability triangle, decision-makers in product development can holistically assess the sustainability of the solution alternatives.}}, author = {{Gräßler, Iris and Hesse, Philipp}}, issn = {{2732-527X}}, journal = {{Proceedings of the Design Society}}, keywords = {{sustainability, decision making, generic product lifecycle, design analysis, ecodesign}}, pages = {{1001--1010}}, publisher = {{Cambridge University Press (CUP)}}, title = {{{Approach to Sustainability-Based Assessment of Solution Alternatives in Early Stages of Product Engineering}}}, doi = {{10.1017/pds.2022.102}}, volume = {{2}}, year = {{2022}}, } @inproceedings{34085, author = {{Ostermann, Moritz and Grenz, Julian and Triebus, Marcel and Cerdas, Felipe and Marten, Thorsten and Tröster, Thomas and Herrmann, Christoph}}, booktitle = {{Proceedings of the 17th Conference on Sustainable Development of Energy, Water and Environment Systems}}, location = {{Paphos, Cyprus}}, title = {{{Integrating Future Energy, Material and Production Scenarios in Life Cycle Engineering of Automotive Lightweight Structures}}}, year = {{2022}}, } @article{30510, abstract = {{The corrosion behavior of a hybrid material consisting of intrinsically bonded carbon fiber-reinforced epoxy resin with laser-structured EN AW 6082 metal was investigated. Particular attention was paid to the effects of the laser-structuring, surface topography and the contacting. Pristine and hybridized specimens were corroded in aqueous NaCl electrolyte (0.1 mol/l) using a potentiodynamic polarization technique and subsequently analyzed using computed tomography, scanning electron-, light- and laser scanning microscopy. The results show that the corrosive reaction arises mainly from the aluminum component. Surface pretreatment of the aluminum resulted in increasing corrosion rates, but showed no influence on the hybrids corrosion properties. Optical micrographs suggest that the epoxy resin acts as a sealant preventing galvanic corrosion between the aluminum and carbon fibers by hindering the diffusion of the electrolyte into the joints. While corrosion effects were observed locally at the aluminum surface, they were, contrary to expectations, not enhanced on the hybrid interfaces.}}, author = {{Delp, Alexander and Freund, Jonathan and Wu, Shuang and Scholz, Ronja and Löbbecke, Miriam and Haubrich, Jan and Tröster, Thomas and Walther, Frank}}, issn = {{0263-8223}}, journal = {{Composite Structures}}, keywords = {{Civil and Structural Engineering, Ceramics and Composites}}, publisher = {{Elsevier BV}}, title = {{{Influence of laser-generated surface micro-structuring on the intrinsically bonded hybrid system CFRP-EN AW 6082-T6 on its corrosion properties}}}, doi = {{10.1016/j.compstruct.2022.115238}}, volume = {{285}}, year = {{2022}}, } @inproceedings{49424, abstract = {{Der Beitrag liefert einen Überblick über die Möglichkeiten der gekoppelten multiphysikalischen numerischen Simulation mit dem Finite Elemente-Löser LS-DYNA. Am Beispiel der resistiven Schnellerwärmung einer Titanlegierung im Forschungsprojekt TISTRAQ erfolgt die Beschreibung der Vorgehensweise, der Eingangs- und Ergebnisgrößen sowie der weiteren Anwendung der Simulation im Forschungsprojekt. Im Fokus steht dabei die Ermittlung der lokalen Temperaturverläufe, deren Kenntnis eine Grundvoraussetzung für die Berechnung prozessabhängiger Materialkennwerte darstellt.}}, author = {{Merten, Mathias and Klöppel, Thomas and Haufe, André and Kaiser, Maximilian Alexander and Wesendahl, Jan-Niklas and Konrad, Stefan}}, booktitle = {{Workshop Warmblechumformung}}, editor = {{Merklein, Marion}}, location = {{Fürth}}, publisher = {{Lehrstuhl für Fertigungstechnologie}}, title = {{{Gekoppelte Simulation des resistiven Schnellerwärmens für Fertigungsprozesse mit integrierter Wärmebehandlung am Beispiel der Titanlegierung Ti-6Al-4V}}}, volume = {{17}}, year = {{2022}}, } @inproceedings{49433, author = {{Kaiser, Maximilian Alexander and Rockicki, Pawel and Höschen, Fabian and Wesendahl, Jan-Niklas and Konrad, Stefan and Meyer, Thomas and Marten, Thorsten and Tröster, Thomas}}, keywords = {{Ti-6Al-4V, heat transfer coefficient}}, location = {{Orlando}}, title = {{{ Heat transfer coefficient investigation for hot die quenching process of Ti-6Al-4V alloy}}}, year = {{2022}}, } @inproceedings{49435, author = {{Kaiser, Maximilian Alexander and Wesendahl, Jan-Niklas and Meyer, Thomas}}, location = {{Berlin}}, title = {{{Isothermal hot forming of Titanium sheet metal - From parameter identification to custom parts}}}, year = {{2022}}, } @article{58571, author = {{Dogan, Deniz and Ruthmann, Simon and Seewald, Oliver and Bremser, Wolfgang}}, issn = {{0300-9440}}, journal = {{Progress in Organic Coatings}}, publisher = {{Elsevier BV}}, title = {{{Tuning of antifouling active PDMS domains tethered to epoxy/amine surface}}}, doi = {{10.1016/j.porgcoat.2022.106977}}, volume = {{170}}, year = {{2022}}, } @inproceedings{50744, abstract = {{The manufacturing industry contributes immensely to the global emissions and therefore is a key factor that has to be addressed when a more sustainable production is desired. Laser Powder Bed Fusion (LPBF) is an AM technique that offers the possibility to manufacture metal parts in a more material efficient way due to the layer-by-layer build-up. Nevertheless, the processing chain for parts from LPBF contains additional steps like powder atomization, which also influence the ecological footprint of the production chain. Within this work, a life-cycle model for the production step of parts from AlSi10Mg powder material is developed. The model is supplied with data from the powder atomization up to the production step, either by literature, database or experimental measurements during production. The footprint in terms of CO2 emissions is then analyzed and emission-intense steps are identified. Two manufacturing scenarios are considered to evaluate the sensitivity on the emissions.}}, author = {{Bödger, Christian and Weiss, Christian and Schiefer, Ekkehard and Heussen, Daniel and Haefner, Constantin}}, booktitle = {{Proceedings of the 33rd Annual International Solid Freeform Fabrication Symposium – An Additive Manufacturing Conference}}, location = {{Austin}}, title = {{{Evaluation of the Ecological Footprint for Parts from AlSi10Mg manufactured by Laser Powder Bed Fusion}}}, year = {{2022}}, } @inbook{52409, author = {{Scionti, Eugenio and Genovese, Matteo and Pellinger, Christoph and Fragiacomo, Petronilla and Schlüter, Alexander}}, booktitle = {{Sustainable and Smart Energy Systems for Europe´s Cities and Rural Areas}}, editor = {{Schlüter, Alexander and Bernabé-Moreno, Juan}}, publisher = {{Hanser-Verlag }}, title = {{{Using More Hydrogen and Green Fuels}}}, year = {{2022}}, } @book{52353, editor = {{Schlüter, Alexander and Bernabé-Moreno, Juan}}, isbn = {{978-3-446-47294-5}}, pages = {{384}}, publisher = {{Hanser}}, title = {{{Sustainable and Smart Energy Systems for Europe's Cities and Rural Areas}}}, doi = {{https://www.hanser-elibrary.com/doi/book/10.3139/9783446471757}}, year = {{2022}}, } @inproceedings{32875, author = {{Ostermann, Moritz and Behm, Jonathan and Marten, Thorsten and Tröster, Thomas and Weyer, Johannes and Cepera, Kay and Adelt, Fabian}}, booktitle = {{14. Wissenschaftsforum Mobilität}}, location = {{Duisburg}}, title = {{{Individualisierung des ÖPNV - Integration technischer und sozialer Dimensionen nachhaltiger Mobilität}}}, year = {{2022}}, }