@techreport{33070, author = {{Fuhrmann, Anika and Schoch, Rebecca and Rusam, Alexander and Bosse, Michael and Flachmann, Felix and Moritzer, Elmar and Hochrein, Thomas and Bastian, Martin}}, publisher = {{Shaker}}, title = {{{Verbessertes Füllverhalten im Spritzgießprozess durch Schäumen von WPC: Bewertung des Fließverhaltens treibmittelbeladener Polymerschmelzen}}}, year = {{2022}}, } @inproceedings{33288, author = {{Moritzer, Elmar and Bürenhaus, Franziska Isabelle}}, booktitle = {{37th International Conference of the Polymer Processing Society (PPS)}}, location = {{Fukuoka (Japan)}}, title = {{{Influence of Screw Design on Fiber Breakage of Glass Fiber Reinforced Polypropylene in the Injection Molding Process}}}, year = {{2022}}, } @misc{33286, author = {{Hopp, Matthias and Tölle, Lisa and Monsé, C. and Rosenkranz, N. and Haibel, N. and Walter, D. and Bünger, J. and Westphal, G.}}, booktitle = {{Journal of Material Science and Chemical Engineering}}, issn = {{2327-6053}}, title = {{{Characterization of Fiber Dust Resulting from Recycling of Carbon Fiber-Reinforced Thermoplastics (CFRP) and Their Cell Toxicity}}}, year = {{2022}}, } @inproceedings{33290, author = {{Moritzer, Elmar and Scheiermann, Denis and Bellusova, Denisa and Klie, Benjamin and Giese, Ulrich}}, booktitle = {{ScienceBG}}, location = {{Burgas (Bulgaria)}}, title = {{{Multimaterial Injection Moulding of Thermosets and Elastomers}}}, year = {{2022}}, } @misc{33292, author = {{Moritzer, Elmar and Scheiermann, Denis and Bellusova, Denisa and Klie, Benjamin and Giese, Ulrich}}, booktitle = {{Kunststoffland NRW}}, pages = {{34--35}}, title = {{{Spritzgießen hochtemperaturbeständiger Baugruppen aus Duromeren und Elastomeren}}}, year = {{2022}}, } @inproceedings{33296, author = {{Moritzer, Elmar and Netzband, Dennis and Ujma, Andreas }}, title = {{{Messtechnische Ermittlung der Strukurintensität bei spritzgegossenen, faserverstärkten Kunststoffen}}}, year = {{2022}}, } @inproceedings{33355, author = {{Klippstein, Sven Helge}}, location = {{Berlin}}, publisher = {{7. AM Forum Berlin}}, title = {{{Neue Polymerwerkstoffe - Der Schlüssel für die Industrialisierung}}}, year = {{2022}}, } @article{6579, abstract = {{An explicit approach using symplectic time integration in conjunction with traditional finite difference spatial derivatives to solve the wave equation in moving media is presented. A simple operator split of this second order wave equation into two coupled first order equations is performed, allowing these split equations to be solved symplectically. Orders of symplectic time integration ranging from first to fourth along with orders of spatial derivatives ranging from second to sixth are explored. The case of cylindrical acoustic spreading in air under a constant velocity in a 2D square structured domain is considered. The variation of the computed time-of-flight, frequency, and wave length are studied with varying grid resolution and the deviations from the analytical solutions are determined. It was found that symplectic time integration interferes with finite difference spatial derivatives higher than second order causing unexpected results. This is actually beneficial for unstructured finite volume tools like OpenFOAM where second order spatial operators are the state-of-the art. Cylindrical acoustic spreading is simulated on an unstructured 2D triangle mesh showing that symplectic time integration is not limited to the spatial discretization paradigm and overcomes the numerical diffusion arising with the in-built numerical methods which hinder wave propagation.}}, author = {{Inguva, Venkatesh and Feldmann, Nadine and Claes, Leander and Koturbash, Taras and Hahn-Jose, Thomas and Koutcherov, Vladimir and Kenig, Eugeny}}, journal = {{Engineering Reports}}, title = {{{An explicit symplectic approach to solving the wave equation in moving media}}}, doi = {{10.1002/eng2.12573}}, year = {{2022}}, } @inproceedings{31070, author = {{Bothe, Mike and Lutters, Nicole and Kenig, Eugeny Y.}}, location = {{Frankfurt am Main}}, title = {{{Untersuchung von Gefahrensituationen bei industriellen Absorption/Desorption-Prozessen mittels dynamischer Simulation}}}, year = {{2022}}, } @article{33497, author = {{Krüger, Jan Tobias}}, journal = {{crystals}}, title = {{{Adjustment of AgCaLa Phases in a FeMn Matrix via LBM for Implants with Adapted Degradation}}}, doi = {{https://doi.org/10.3390/cryst12081146}}, volume = {{12}}, year = {{2022}}, } @inbook{33500, abstract = {{This article is dedicated to piezoelectric ultrasonic power transducers that differ to well known medical ultrasonic diagnostic apparatus or non destructive testing devices by the level of power in use; typically several tens of up to more than thousand watts are used in a multitude of different applications. After a short introduction including historical development, the first focus is on theoretical background of the operating principle, design and mechanical modeling. As piezoelectric elements transform electrical to mechanical energy and vice versa, equivalent circuit modeling is also described. After that, sample applications are delineated by the matter wherein ultrasound generates unique effects: incredible high pressure level as well in air as in water, micro-bubbles generating temperature peaks for very short time instances in fluids, acoustoplastic effect, enhancement of diffusion and recrystallization in solids, friction manipulation, incremental deformation and micro-cracking of surfaces, or even generation of macroscopic movements in motors. At the end, some future directions ranging from novel modeling approaches to advanced control and new materials are addressed.}}, author = {{Hemsel, Tobias and Twiefel, Jens}}, booktitle = {{Reference Module in Materials Science and Materials Engineering}}, isbn = {{978-0-12-803581-8}}, keywords = {{Equivalent circuit model, Langevin transducer, Lumped parameter model, Piezoelectric transducer, Ultrasonic processes, Ultrasound}}, publisher = {{Elsevier}}, title = {{{Piezoelectric Ultrasonic Power Transducers}}}, doi = {{10.1016/b978-0-12-819728-8.00047-4}}, year = {{2022}}, } @inproceedings{33522, author = {{Bernemann, Sören Antonius and Maćkowiak, Jan and Maćkowiak, Jerzy and Bertling, René and Lutters, Nicole and Kenig, Eugeny}}, keywords = {{CFD, simulation, agricultural waste, multiphase}}, location = {{Frankfurt am Main}}, title = {{{Development of an innovative separation unit for nitrogen recovery from agricultural waste}}}, year = {{2022}}, } @article{33523, abstract = {{Die thermisch verursachte, plastische Verformung an statischen Druckplatten von Lamellenbremsen kann das Betriebsverhalten von Bremsen nachhaltig stören und sollte daher vermieden werden. So kann die plastische Verformung der Druckplatte beispielsweise zu einer Verkleinerung des Luftspalts führen und ungewollte Veränderung der Reibverhältnisse verursachen. Während des Bremsvorgangs dehnen sich hoch erwärmte Bereiche nah der Reibfläche aus und werden von den Zonen geringerer Temperatur an ihrer Ausdehnung gehindert. Überschreiten die daraus resultierenden Spannungen die Dehngrenze des Materials, kommt es zu plastischer Verformung. Dieser Artikel erläutert den physikalischen Verformungsprozess detailliert und darauf aufbauend, welche Maßnahmen zu einer Verringerung der Verformung ergriffen werden können. Dazu werden im Rahmen theoretischer Vorüberlegungen drei Ansätze identifiziert, die sowohl die Geometrie als auch die Werkstoffe der Druckplatten betreffen. Radiale Schlitze sollen die Behinderung der thermischen Dehnung verhindern und dadurch Spannungen reduzieren; die Werkstoffauswahl auf Basis der Thermoschockempfindlichkeit reduziert die plastische Verformung. Anhand einer kombinierten Simulation der Thermik und der Mechanik einer Druckplatte wird der Effekt dieser Ansätze an vier Varianten der Druckplatte überprüft. Experimentelle Untersuchungen an realen Prototypen der Druckplattenvarianten bestätigen die Ergebnisse der Simulation und weisen die Wirksamkeit der vorgeschlagenen Maßnahmen zur Reduzierung der plastischen Verformung nach.}}, author = {{Schadomsky, Magnus and Blumenthal, Lars Martin and Zimmer, Detmar and Peter, Simon and Boros, Laszlo}}, issn = {{0015-7899}}, journal = {{Forschung im Ingenieurwesen}}, keywords = {{General Engineering, Bremsen, Bremsscheiben, thermoplastische Verformung}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Maßnahmen zur Reduzierung von plastischer Verformung an statischen Druckplatten von Lammellenbremsen infolge einseitig eingebrachter hoher Reibleistung}}}, doi = {{10.1007/s10010-022-00601-2}}, year = {{2022}}, } @phdthesis{33499, author = {{Otroshi, Mortaza}}, isbn = {{978-3-8440-8777-2}}, issn = {{1434-6915}}, pages = {{128}}, publisher = {{Shaker Verlag}}, title = {{{Damage modeling in the numerical simulation of mechanical joining processes}}}, doi = {{https://doi.org/10.2370/9783844087772}}, year = {{2022}}, } @inproceedings{30123, author = {{Otroshi, Mortaza and Meschut, Gerson}}, location = {{Pittsburg, Pennsylvania, USA}}, title = {{{Investigation of the three-dimensional stress state during loading of self-piercing riveted joints}}}, year = {{2022}}, } @inproceedings{33561, author = {{Tews, Karina and Teutenberg, Dominik and Meschut, Gerson}}, location = {{Blankenburg (Harz)}}, title = {{{Experimentelle Untersuchung des Ermüdungsverhaltens und Berechnung der Lebensdauer von Stahlklebverbindungen bei multiaxialer Belastung}}}, year = {{2022}}, } @inbook{33728, author = {{Bielak, C. R. and Böhnke, M. and Bobbert, M. and Meschut, G.}}, 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}}, } @article{33859, author = {{Moritzer, Elmar and Elsner, Christian Lennart}}, journal = {{Macromolecular Symposia}}, location = {{Bukarest}}, number = {{1}}, publisher = {{Wiley}}, title = {{{Investigation and Improvement of Processing Parameters of a Copper-Filled Polymer Filament in Fused Filament Fabrication as a Basis for the Fabrication of Low-Porosity Metal Parts}}}, doi = {{https://doi.org/10.1002/masy.202100390}}, volume = {{404}}, year = {{2022}}, } @article{33861, author = {{Moritzer, Elmar and Wächter, Julian}}, journal = {{Macromolecular Symposia}}, location = {{Bukarest}}, number = {{1}}, publisher = {{Wiley}}, title = {{{Development of a Procedure for the Assessment of Material Potentials under Consideration of the Weld Seam Quality for Multi-Material Applications in the FDM Process}}}, doi = {{https://doi.org/10.1002/masy.202100389}}, volume = {{404}}, year = {{2022}}, } @book{33865, abstract = {{Lightweight materials such as aluminium and ultra-high-strength steel are increasingly being used in modern material mixed design in car body construction. As a fixing method for hybrid joining with structural adhesive, clinching has the advantage over other mechanical joining technologies that different materials can be joined without an auxiliary joining part and pre-hole. Due to the large degree of deformation in the joining partners, strong in-plane and out-of-plane material flows occur during the setting process, which can lead to plastic deformation. The aim of this work is the further development of shear-clinching for low-deformation of aluminium-steel joints. To gain a basic understanding of the joint deformation, the deformation of the joint partners during the setting process is identified step by step. Based on the knowledge gained, the deformation-related influencing factors are investigated experimentally. Thus, optimisation approaches as well as suggested handling methods for the production of a low-deformation shear-clinching joint are derived. For the realisation of the common narrow flange, which is to be characterised as deformation-sensitive due to a small edge distance, a numerically supported tool modification is carried out and subsequently experimentally validated. }}, author = {{Han, Daxin}}, title = {{{Deformationsarme Fügeverbindungen mittels prozessoptimiertem Schneidclinchen}}}, year = {{2022}}, }