@inproceedings{24439, author = {{Gräßler, Iris and Hesse, Philipp}}, location = {{Valletta, Malta}}, pages = {{37--41}}, publisher = {{The University of Malta}}, title = {{{Decision Support for Product Specific Recycling}}}, year = {{2021}}, } @inproceedings{24017, abstract = {{In developing complex technical systems, requirements are subject to continuous change. Systematic and holistic change impact analysis and proactive measures are required for reducing the number of requirement changes and their negative impact. There is no method to analyse the holistic impact of a requirement change in the context of developing complex technical systems. Holistic analysis requires to consider the local effects of requirement changes as well as effects from change propagation. To develop an approach for holistic change propagation and impact analysis, twelve performance goals are defined. Those are derived from a state of research analysis as well as an industry workshop. A three-step method is proposed. Firstly, requirement dependencies that cause change propagation are detected. Secondly, critical requirements are automatically identified based on a Page Rank algorithm. Thirdly, change impact of critical requirements is analysed based on a guideline. Validation proves that ten goals are fulfilled and two are partly fulfilled. The method addresses major shortcomings of preceding research and enables sound decision making for development engineers both before a change occurs and during decision process on a change request. This helps to reduce negative change impact in development projects and the risk of project failure.}}, author = {{Gräßler, Iris and Oleff, Christian and Preuß, Daniel}}, editor = {{Wagner, Beverly and Wilson, Juliette}}, location = {{Strathclyde/Glasgow}}, title = {{{Holistic change propagation and impact analysis in requirements management}}}, year = {{2021}}, } @inproceedings{27128, author = {{Gräßler, Iris and Hillebrand, Stefan and Roesmann, Daniel}}, isbn = {{978-9-492-85916-7}}, location = {{Valletta, Malta }}, pages = {{29--36}}, title = {{{Design Review of Assembly Workstations using Virtual Prototypes}}}, year = {{2021}}, } @phdthesis{34274, author = {{Eichwald, Paul}}, isbn = {{ 978-3-8440-7812-1}}, pages = {{144}}, publisher = {{Shaker}}, title = {{{Prozessgerechte Gestaltung von Werkzeugen auf Basis von Verschleißsimulationen am Beispiel des Ultraschallbondens}}}, volume = {{11}}, year = {{2021}}, } @article{30649, abstract = {{Nowadays, the production of modern lightweight structures, like a body in white structure requires a wide variety of mechanical joining processes. To fulfill the various demands, mechanical joining processes and joining elements (JE) are used. Very often, they are adapted to the application, which leads in turn to a numerous of different variants, high costs, and loss of the process chain versatility. To overcome this drawback, an innovative approach is the usage of individually produced and task-adapted JE, the so-called friction spun joint connectors (FSJC). These connectors can be modified in shape as well as in material properties. This flexibility offers high potential for lightweight design but also increases the necessary analytical effort regarding the forming process as well as the manufactured joint's properties. Therefore, a new analysis strategy based on the Finite-Element-Method (FEM) is proposed, which numerically determines the local load bearing capacity within a given joint in order to identify the critical regions for load transfer. The process of joining element manufacturing and the analysis strategy will be described in detail and optimization results of the joints are shown. Numerical results are discussed and possible recommendations for joint manufacturing are derived.}}, author = {{Wischer, Christian and Steinfelder, Christian and Homberg, Werner and Brosius, Alexander}}, journal = {{IOP Conference Series: Materials Science and Engineering}}, pages = {{012007}}, title = {{{Joining with Friction Spun Joint Connectors – Manufacturing and Analysis}}}, doi = {{10.1088/1757-899x/1157/1/012007}}, volume = {{1157}}, year = {{2021}}, } @article{30702, author = {{Wischer, Christian and Homberg, Werner}}, journal = {{Production Engineering}}, title = {{{A contribution on versatile process chains: joining with adaptive joining elements, formed by friction spinning}}}, doi = {{10.1007/s11740-021-01094-8}}, year = {{2021}}, } @inproceedings{21802, author = {{Sander, Sascha and Teutenberg, Dominik and Meschut, Gerson and Matzenmiller, Anton}}, booktitle = {{21. Kolloquium Gemeinsame Forschung in der Klebtechnik}}, location = {{Online Konferenz}}, title = {{{Methodenentwicklung zur Langzeitprognose von Klebverbindungen bei kombinierter Temperatur- und Medieneinwirkung}}}, year = {{2021}}, } @article{26854, author = {{Moritzer, Elmar and Flachmann, Felix}}, journal = {{Kunststoffe}}, pages = {{42--44}}, title = {{{Die Fließfront darf nicht brechen}}}, volume = {{12}}, year = {{2021}}, } @inproceedings{31221, author = {{Mügge, Nils and Kronberg, Alexander and Glushenkov, Maxim and Kenig, Eugeny}}, booktitle = {{Jahrestreffen der ProcessNet-Fachgruppen Fluidverfahrenstechnik und Wärme- und Stoffübertragung}}, keywords = {{IEM, isobaric expansion, dense fluids}}, location = {{Online-Konferenz}}, title = {{{Grenzen des Wärmetransports im isobaren Expansionsmotor}}}, year = {{2021}}, } @inproceedings{31499, author = {{Olfert, Viktoria and Meschut, Gerson and Hein, David and Rochel, Philip and Sommer, Silke}}, location = {{Dresden}}, title = {{{Einfluss fertigungsbedingter Toleranzen auf das Versagens- und Verformungsverhalten mechanisch gefügter Verbindungen unter Crashbelastung}}}, year = {{2021}}, } @misc{31707, author = {{Moritzer, Elmar and Hillemeyer, J. and Kramer, M. and Hopmann, C. }}, booktitle = {{Plastverarbeiter}}, issn = {{0032-1338}}, number = {{71}}, pages = {{56--60}}, title = {{{Direktverschraubung von Duroplasten Eine wirtschaftliche Lösung}}}, year = {{2021}}, } @misc{31725, author = {{Moritzer, Elmar and Wortmann, Martin and Viertel, Klaus and Welle, Alexander and Keil, Waldemar and Frese, Natalie and Hachmann, Wiebke and Krieger, Philipp and Brikmann, Johannes and Schmidt, Claudia and Hüsgen, Bruno}}, booktitle = {{International Journal of Heat and Mass Transfer}}, title = {{{Anomalous bulk diffusion of methylene diphenyl diisocyanate in silicone elastomer}}}, year = {{2021}}, } @inproceedings{31719, author = {{Schöppner, Volker and Vogtschmidt, Sascha}}, booktitle = {{ DVS CONGRESS}}, isbn = {{978-3-96144-147-1}}, location = {{digital}}, title = {{{ Analyse des Erwärm- und Umstellverhaltens beim Schweißen von hochtemperaturbeständigen Kunststoffen}}}, year = {{2021}}, } @inproceedings{31730, author = {{Schöppner, Volker and Vogtschmidt, Sascha}}, booktitle = {{Technomer}}, location = {{Deutschland (digital)}}, title = {{{ Anwendungsorientiertes Schweißen von hochtemperaturbeständigen Kunststoffen}}}, year = {{2021}}, } @inproceedings{32799, abstract = {{The advantages of Additive Manufacturing (AM) highlight the capability to become an inherent part within the product development process. However, process specific challenges harm its further currency for industrial applications, for instance the high geometrical deviations. Different process factors influence the manufacturing accuracy and lead to large dimensional, form and positional deviations. Published research relative to deviations is difficult to compare, because it is based on several specimens that were manufactured with different processes, materials and machine settings. This fact emphasizes that reliable tolerance values for AM are hard to define in standards. Within this investigation, a universally applicable method was developed to examine geometrical deviations for AM processes. The main aim is the derivation of achievable tolerance values considering important influencing factors. Furthermore, due to the locally varying surface roughness of additively manufactured parts several tactile measurements were compared.}}, author = {{Lieneke, Tobias and Lammers, Stefan and Zimmer, Detmar}}, booktitle = {{32nd Annual International Virtual Solid Freeform Fabrication (SFF) Symposium }}, location = {{Austin, Texas, USA}}, title = {{{Geometrical Deviations In Additive Manufacturing -- Influences On The Manufacturing Accuracy}}}, doi = {{http://dx.doi.org/10.26153/tsw/17565}}, year = {{2021}}, } @inproceedings{21726, author = {{Triebus, Marcel and Tröster, Thomas}}, booktitle = {{9th NRW Nano Conference - Innovations in Materials and Applications}}, location = {{Web}}, title = {{{HyOpt - Optimization-Based Development of Hybrid Materials}}}, year = {{2021}}, } @inproceedings{25265, abstract = {{Waveguide-based methods can be used for the non-destructive determination of acoustic material parameters. One of these methods is based on transmission measurements of cylindrical polymeric specimens. Here, the experimental setup consists of two transducers, which excite and receive the waveguide modes at the faces of the cylinder. The measurement, as well as a forward model, are used to determine material parameters of the polymeric specimen in an inverse approach. 1-3 piezoelectric composites are used as an active element because they can be approximated by a thickness vibration only. This allows an easy identification of Mason model parameters to characterise the transducers’ vibration behaviour. However, sensitivity analysis shows a high uncertainty in the determination of the mechanical shear parameters due to the uniform excitation. To increase the sensitivity to these shear motions, arbitrary excitations were investigated by means of numerical simulation. In order to be able to realise the determined optimal excitation, new transducer prototypes were designed. By subdividing the electrodes of the active element, for example, ring-shaped excitation is feasible. Furthermore, it can be shown that modelling these transducers with a one-dimensional Mason model is sufficient.}}, author = {{Dreiling, Dmitrij and Itner, Dominik and Feldmann, Nadine and Scheidemann, Claus and Gravenkamp, Hauke and Henning, Bernd}}, booktitle = {{Fortschritte der Akustik - DAGA 2021}}, location = {{Wien}}, publisher = {{Deutsche Gesellschaft für Akustik e.V. (DEGA)}}, title = {{{Application and modelling of ultrasonic transducers using 1-3 piezoelectric composites with structured electrodes}}}, year = {{2021}}, } @inproceedings{24229, author = {{Buckmann, Felix and Kenig, Eugeny}}, location = {{online}}, title = {{{Experimentelle Untersuchungen zum Kondensationsverhalten von Wasserdampf im Spalt zwischen Kissenplatten}}}, year = {{2021}}, } @inproceedings{24230, author = {{Buckmann, Felix and Kenig, Eugeny}}, location = {{online}}, title = {{{Condensation in pillow-plate heat exchangers: Experiments with pure substances}}}, year = {{2021}}, } @misc{24202, author = {{Pawelczyk, Sebastian and Jesinghausen, Steffen and Schmid, Hans-Joachim}}, title = {{{Charakterisierung des Fließverhaltens von Frischbeton – Entwicklung eines adaptiven Rheometers (ACCR) und Einfluss von Maßnahmen zur Sedimentationsprävention}}}, year = {{2021}}, }