TY - CONF AB - Arburg Plastic Freeforming (APF) is an additive manufacturing process with which three-dimensional, thermoplastic components can be produced layer by layer. Visual and geometrical properties are a major criterion for characterizing the resulting component quality. The aim of this study was to investigate the influences on visual and geometrical properties of APF components depending on process parameters. Initially the focus was on the analysis of the shrinkage behavior of ABS-M30 (Stratasys). On the basis of the results and an existing procedure by the machine manufacturer, an optimized procedure for determining the scaling factors was developed to counteract the shrinkage. With this procedure a higher dimensional accuracy of the components can be achieved. In addition, it was investigated whether an adaption of the form factor based on a mathematical model depending on the component geometry makes sense. The results were transferred into manufacturing guidelines, which allow the user of the APF-technology to optimize process parameters more efficiently. AU - Moritzer, Elmar AU - Hecker, Felix AU - Elsner, Christian Lennart AU - Hirsch, André ED - Bourell, David ID - 24101 T2 - Proceedings: 2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021) TI - Investigations for the Optimization of Visual and Geometrical Properties of Arburg Plastic Freeforming Components ER - TY - CONF AB - The additive manufacturing process Fused Deposition Modeling (FDM) is established in the industry for many years. A new, similar process to FDM is the Arburg Plastic Freeforming (APF). The main differences between both processes are the form of the starting material (FDM: Filaments, APF: Conventional granulate) and the material deposition during the layer formation (FDM: Melt strand, APF: fine molten droplets). Since the two processes can be used in similar applications, the aim of this study is to compare both processes in a holistic way. Furthermore, the advantages and disadvantages of the processes are to be highlighted. The systematic comparison between a Stratasys 400mc and the Freeformer 200-3X is divided into the areas of component properties, design limitations and economic efficiency. The material ABS-M30 (Stratasys) is used in both processes. The results show comparable component properties regarding mechanical and optical properties but also differences in design limitations and cost efficiency. AU - Moritzer, Elmar AU - Hecker, Felix AU - Driediger, Christine AU - Hirsch, André ED - Bourell, David ID - 24099 T2 - Proceedings: 2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021) TI - Comparison of Component Properties and Economic Efficiency of the Arburg Plastic Freeforming and Fused Deposition Modeling ER - TY - CONF AB - The Arburg Plastic Freeforming (APF) is an additive manufacturing process with which three-dimensional, thermoplastic components can be produced layer by layer. One disadvantage of the APF is the long residence time of the molten material in the plasticizing unit compared to conventional injection moulding. The dosing volume is emptied very slowly due to only discharging fine plastic droplets. As a result, long residence times can be expected, which can lead to thermal degradation of the material. The aim of this study was to develop a model for calculating the residence time of the material in the APF. The residence time of the material in the thermally critical dosing volume is predicted using software developed in-house. The accuracy of the model could be verified by experimental investigations. Finally, the thermal degradation of the material was investigated by analyzing the correlation to the mechanical properties of tensile strength specimens. AU - Moritzer, Elmar AU - Hecker, Felix AU - Hirsch, André ED - Bourell, David ID - 24096 T2 - Proceedings: 2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021) TI - Investigation and Modeling of the Residence Time Dependent Material Degradation in the Arburg Plastic Freeforming ER - TY - JOUR AU - Kückmann, Marie-Ann AU - Kundisch, Heike ID - 50363 JF - Didaktisierung des Digitalen: Zur Entwicklung berufs- und wirtschaftspädagogischer Studiengänge TI - Denken mit dem Stift?! – Digitale Visualisierungsprozesse als Zugang zu komplexen wirtschafts- und berufspädagogischen Themenfeldern. ER - TY - CONF AU - Leffrang, Dirk AU - Müller, Oliver ID - 26812 T2 - IEEE Workshop on TRust and EXpertise in Visual Analytics TI - Should I Follow this Model? The Effect of Uncertainty Visualization on the Acceptance of Time Series Forecasts ER - TY - CONF AB - In automotive and other fields of application media-carrying components often have complex, flow-optimized geometries and are made of plastics for reasons of weight and cost. Therefore, the laser sintering technology is predestinated to manufacture these components as it offers a very high degree of design freedom and good mechanical properties. For industrial applications the long-term properties of the SLS material in contact with liquid media are important and were therefore investigated for PA12, PP and PA613. Hereby, different media such as motor oil or Glysantin based coolant were tested with different temperatures and immersion times of up to 26 weeks. The mechanical properties were tested after immersion and compared to injection molded samples. Furthermore, laser sintering design guidelines for media-carrying components were developed. These guidelines for instance include the minimum wall thickness to ensure media tightness and the removal of powder from channels with a high length to diameter ratio. AU - Kletetzka, Ivo AU - Kummert, Christina AU - Schmid, Hans-Joachim ID - 24160 T2 - Proceedings of the 32nd Annual International Solid Freeform Fabrication Symposium TI - Laser Sintering Design Guidelines for media transmitting Components VL - 32 ER - TY - CHAP AB - In diesem Beitrag wird das Konzept des student engagement mit den drei Dimensionen Verhalten, Emotion und Kognition skizziert und in Bezug auf die unterstützenden Faktoren für Lehre auf Distanz in digitalen Lehr-Lernsettings untersucht. Ein Abgleich der theoretischen Grundlagen mit Forschungsergebnissen verschiedener Studien zum Onlinesemester 2020 sowie eine Konkretisierung durch Evaluationen aus Seminaren der englischen Sprachwissenschaft und der Kunstdidaktik gibt Aufschluss darüber, wie ein geeignetes how to engage auch in digitalen Lehr-Lernsettings gelingen kann. Darüber hinaus lassen die Ausführungen erkennen, dass die unterstützenden Faktoren häufig in ähnlich priorisiert werden. Daraus ergibt sich eine Reihenfolge mit dem unterstützenden Umfeld an erster, aktivem und kollaborativem Lernen an zweiter, Erleben von Kompetenz an dritter und akademischer Herausforderung an vierter Stelle. Die Ergebnisse können damit einen Weg aufzeigen, wie auch in ungewohnten Lehr-Lernsettings sukzessive ein geeignetes how to engage entwickelt werden kann, um student engagement zu fördern. AU - Schmidt, Rebekka AU - Mindt, Ilka ED - Neiske, Iris ED - Osthushenrich, Judith ED - Schaper, Niclas ED - Trier, Ulrike ED - Vöing, Nerea ID - 32488 SN - 2749-7623 T2 - Hochschule auf Abstand. Ein multiperspektivischer Zugang zur digitalen Lehre TI - Student engagement in digitalen Lehr-Lern-Szenarien ER - TY - JOUR AU - Spener, Anna Maria ID - 48691 JF - Undercurrents – Forum für linke Literaturwissenschaft TI - "Unsere Rache ist unsere Existenz. Unsere Waffe ist die Sprache." Zum desintegrativen Potenzial von Mirna Funks Roman "Winternähe" VL - 16 ER - TY - JOUR AU - Blank, Andreas ID - 50862 IS - 5 JF - Journal of Modern Philosophy TI - “Mably on Esteem, Republicanism, and the Question of Human Corruption.” VL - 3 ER - TY - JOUR AU - Blank, Andreas ID - 50863 IS - 6 JF - History of European Ideas TI - “The Morality of the Desire for Esteem: Gassendi and the Augustinian Challenge.” VL - 47 ER - TY - JOUR AU - Blank, Andreas ID - 50864 IS - 4 JF - European Journal of Philosophy TI - “Wolff on Duties of Esteem in the Law of Peoples.” VL - 29 ER - TY - CHAP AU - Haker, Christoph AU - Otterspeer, Lukas ED - Sehmer, Julian ED - Simon, Stephanie ED - Ten Elsen, Jennifer ED - Thiele, Felix ID - 51310 SN - 9783658325596 T2 - recht extrem? Dynamiken in zivilgesellschaftlichen Räumen TI - Die epistemische Dimension der Neuen Rechten. Von einer Kritik des Wissenschafts- und Bildungsverständnisses der Neuen Rechten zu einer Selbstkritik ER - TY - JOUR AB - Critique has run out of steam – this diagnosis by Bruno Latour is crucial for the “Manifesto for post-critical education” as well as for the on_education issue “The Fatique of Critique?”. With this essay, we contradict Latour's diagnosis. Latour’s polemic against critique is based firstly on a questionable diagnosis of our time and secondly on a general and programmatic critique of sociology. Against that, we bring out two main points. The first insight highlights that change is initially dependent on variations that can only arise from a negation of the existing. The second insight comes from the sociology of critique, which paradoxically sees success in the failure of critique. AU - Haker, Christoph AU - Otterspeer, Lukas ID - 51315 IS - 9 JF - On Education. Journal for Research and Debate SN - 2571-7855 TI - Against Latour – On the Questionable Foundations of Post-Critical Pedagogy VL - 3 ER - TY - JOUR AU - Haker, Christoph AU - Otterspeer, Lukas ID - 51311 JF - BEHEMOTH. A Journal on Civilisation TI - Die Beweglichkeit der Kritik: zur Wechselbeziehung von Kontextualisierung und Objektivierung im digitalen Zeitalter ER - TY - JOUR AB - To analyze the influence of suspension kinematics on tire wear, detailed simulation models are required. In this study, a non-linear, flexible multibody model of a rear axle system is built up in the simulation software MSC Adams/View. The physical model comprises the suspension kinematics, compliance, and dynamics as well as the non-linear behavior of the tire using the FTire model. FTire is chosen because it has a separate tire tread model to compute the contact pressure and friction force distribution in the tire contact patch. To build up the simulation model, a large amount of data is needed. Bushings, spring, and damper characteristics are modeled based on measurements. For the structural components (e.g., control arms), reverse engineering techniques are used. The components are 3D-scanned, reworked, and included as a modal reduced finite element (FE)-model using component mode synthesis by Craig–Bampton. Finally, the suspension model is validated by comparing the simulated kinematic and compliance characteristics to experimental results. To investigate the interaction of suspension kinematics and tire wear, straight line driving events, such as acceleration, driving with constant velocity, and deceleration, are simulated with different setups of wheel suspension kinematics. The influence of the setups on the resulting friction work between tire and road is examined, and an exemplarily calculation of tire wear based on a validated FTire tire model is carried out. The results demonstrate, on the one hand, that the chosen concept of elasto-kinematic axle leads to a relatively good match with experimental results and, on the other hand, that there are significant possibilities to reduce tire wear by adjusting the suspension kinematics. AU - Schütte, Jan AU - Sextro, Walter ID - 27508 JF - Vehicles SN - 2624-8921 TI - Tire Wear Reduction Based on an Extended Multibody Rear Axle Model ER - TY - JOUR AU - Martin, Sven AU - Schütte, Jan AU - Bäumler, C. AU - Sextro, Walter AU - Tröster, Thomas ID - 29293 JF - Forces in Mechanics SN - 2666-3597 TI - Identification of joints for a load-adapted shape in a body in white using steady state vehicle simulations VL - 6 ER - TY - CHAP AU - Schneider, Jennifer Nicole ED - Beutner, Marc ED - Pechuel, Rasmus ED - Schneider, Jennifer ID - 47962 T2 - Fostering Digitisation and Industry 4.0: Education – Vocation - Industry – Future. New Opportunities and Challenges for European VET. Insights in the DigI-VET Project TI - Digitalisation in the Classroom – Learning Tools ER - TY - BOOK ED - Beutner, Marc ED - Pechuel, Rasmus ED - Schneider, Jennifer Nicole ID - 47978 TI - Fostering Digitisation and Industry 4.0: Education – Vocation – Industry – Future. New Opportunities and Challenges for European VET. Insight in the DigI-VET Project ER - TY - GEN AU - Hilgert, Joachim AU - Weich, Tobias AU - Wolf, L. ID - 51503 TI - Higher-rank quantum-classical correspondence ER - TY - BOOK AU - Degeling, Jasmin ID - 50808 TI - Medien der Sorge, Techniken des Selbst. Praktiken des Über-sich-selbst-Schreibens bei Christoph Schlingensief und Elfriede Jelinek ER -