@inproceedings{41158, author = {{Neukötter, Moritz and Jesinghausen, Steffen and Schmid, Hans-Joachim}}, location = {{Sevilla}}, title = {{{Instability analysis of suspensions with a polymer solution matrix (Presentation)}}}, year = {{2022}}, } @inproceedings{33695, author = {{Rüther, Moritz Johannes and Klippstein, Sven Helge and Schmid, Hans-Joachim}}, editor = {{Rüther, Moritz Johannes and Klippstein, Sven Helge and Schmid, Hans-Joachim}}, location = {{Madrid}}, title = {{{Flowability of polymer powders at elevated temperatures for additive manufacturing}}}, year = {{2022}}, } @inproceedings{43238, author = {{Rüther, Torben and Jesinghausen, Steffen and Schmid, Hans-Joachim}}, keywords = {{Couette, Rheology, Correction}}, location = {{Sevilla}}, title = {{{A novel correction method for the shear rate in a couette rheometer (Vortrag)}}}, year = {{2022}}, } @inproceedings{43243, author = {{Rüther, Torben and Schmid, Hans-Joachim}}, location = {{Madrid}}, title = {{{Multidimensional particle characterization: Centrifugal Differential Mobility Analyzer (Poster)}}}, year = {{2022}}, } @inproceedings{43240, author = {{Rüther, Torben and Jesinghausen, Steffen and Schmid, Hans-Joachim}}, title = {{{NEW CORRECTION APPROACHES FOR DETERMINING THE TRUE SHEAR RATE IN A COAXIAL-RHEOMETER (Vortrag)}}}, year = {{2022}}, } @article{30228, abstract = {{Confidence in additive manufacturing technologies is directly related to the predictability of part properties, which is influenced by several factors. To gain confidence, online process monitoring with dedicated and reliable feedback is desirable for every process. In this project, a powder bed monitoring system was developed as a retrofit solution for the EOS P3 laser sintering machines. A high-resolution camera records each layer, which is analyzed by a Region-Based Convolutional Neural Network (Mask R-CNN). Over 2500 images were annotated and classified to train the network in detecting defects in the powder bed at a very high level. Each defect is checked for intersection with exposure areas. To distinguish between acceptable imperfections and critical defects that lead to part rejection, the impact of these imperfections on part properties is investigated.}}, author = {{Klippstein, Sven Helge and Heiny, Florian and Pashikanti,, Nagaraju and Gessler, Monika and Schmid, Hans-Joachim}}, journal = {{JOM - The Journal of The Minerals, Metals & Materials Society (TMS)}}, location = {{Online}}, pages = {{1149–1157}}, publisher = {{Springer}}, title = {{{Powder Spread Process Monitoring in Polymer Laser Sintering and its Influences on Part Properties}}}, doi = {{https://doi.org/10.1007/s11837-021-05042-w }}, volume = {{74}}, year = {{2022}}, } @inproceedings{33356, abstract = {{By monitoring the recoating process within polymer laser sintering production, it was shown that multiple powder-spread-flaws can be detected. Those groove-like flaws are expected to be the result of agglomerates jamming between the recoater and the last powder layer. This work is analyzing the interaction between powder-spread-flaws and part properties, showing the influence of the recoating process on the performance of laser sintering parts. Therefore, artificial powder-spread-flaws are applied to the build jobs of tensile test specimens which are measured and analyzed regarding the elongation at break, strength and fracture position. For the characteristics of the flaws, the artificial grooves are varied in depth and width. Furthermore, the position of the flaw is changed form mid part to close to surface areas. It was shown, that several flaws are visible at the part surface, resulting in stress concentration and reduced performance. But there are as well parts with flaw-layers, which are not visible after the build process on the part. Those parts can have significantly reduced mechanical properties as well.}}, author = {{Klippstein, Sven Helge and Schmid, Hans-Joachim}}, booktitle = {{Proceedings of the 33nd Annual International Solid Freeform Fabrication Symposium}}, keywords = {{Selective Sasersintering, Process Monitoring, Powder Spread}}, title = {{{Powder Spread Flaws in Polymer Laser Sintering and its Influences on Mechanical Performance}}}, year = {{2022}}, } @article{44468, author = {{Schmidt, Stephan and Gräßer, Melanie and Schmid, Hans-Joachim}}, issn = {{1064-8275}}, journal = {{SIAM Journal on Scientific Computing}}, keywords = {{Applied Mathematics, Computational Mathematics}}, number = {{4}}, pages = {{B1175--B1194}}, publisher = {{Society for Industrial & Applied Mathematics (SIAM)}}, title = {{{A Shape Newton Scheme for Deforming Shells with Application to Capillary Bridges}}}, doi = {{10.1137/20m1389054}}, volume = {{44}}, year = {{2022}}, } @article{44469, author = {{Menge, Dennis and Schmid, Hans-Joachim}}, issn = {{1022-1360}}, journal = {{Macromolecular Symposia}}, keywords = {{Materials Chemistry, Polymers and Plastics, Organic Chemistry, Condensed Matter Physics}}, number = {{1}}, publisher = {{Wiley}}, title = {{{Low Temperature Laser Sintering with PA12 and PA6 on a Standard System}}}, doi = {{10.1002/masy.202100397}}, volume = {{404}}, year = {{2022}}, } @misc{43001, author = {{Zhang, Xiandong and Neukötter, Moritz}}, title = {{{Untersuchung essenzieller Eigenschaften wasserlöslicher Polymere für die Anwendung zur Polymerpulverherstellung}}}, year = {{2022}}, } @inproceedings{31871, author = {{Kletetzka, Ivo and Klippstein, Sven Helge}}, booktitle = {{3D-DRUCK HAUTNAH - Der Einfluss einer Zukunftstechnologie auf unser Leben }}, location = {{Paderborn}}, publisher = {{Universität Paderborn}}, title = {{{Pulver im 3D-Druck - von Mascarabürsten bis zum Interieur eines Mini-Coopers (Vortrag)}}}, year = {{2022}}, } @misc{43011, author = {{Hanselle, Felix Paul}}, title = {{{Untersuchung und Modellierung der Materialeigenschaften von glaskugelgefüllten, im Lasersinterprozess verarbeiteten Dry-Blends}}}, year = {{2022}}, } @misc{43010, author = {{Kosanke, Maren}}, title = {{{Oberflächenmodifikation von Glaskugeln zur Verbesserung der Adhäsion im Lasersinterverfahren}}}, year = {{2022}}, } @misc{43007, author = {{Henke, Frederic}}, title = {{{Potenzialanalyse für die Nutzung additiver Fertigungsverfahren bei einem Büromöbelhersteller und Realisierung eines Beispielbauteils (Studienarbeit)}}}, year = {{2022}}, } @misc{46858, author = {{Ostermeier, Jakob}}, title = {{{Einfluss des Lasersinter-Prozesses auf die Recyclingfähigkeit von flammgeschütztem PA12 Pulver}}}, year = {{2022}}, } @misc{43012, author = {{Sural, Ilknur}}, title = {{{Einfluss der Lagerdauer von PA12- Lasersinterpulver auf die Verarbeitungs- und Bauteileigenschaft}}}, year = {{2022}}, } @misc{43002, author = {{Schott, Alicia and Neukötter, Moritz}}, title = {{{Entwicklung einer Anlage zur Pulverabscheidung im Filament Extension Atomization Prozess}}}, year = {{2022}}, } @inproceedings{37436, author = {{Beimdiek, Janis and Prill, Friedrich and König, Mario and Müller, Mirjam and Hartmann, Ingo and Schmid, Hans-Joachim}}, booktitle = {{13th World Filtration Congress Proceedings}}, location = {{San Diego}}, title = {{{Combined filtration process for biomass combustion plants to comply with legal requirements (oral presentation)}}}, year = {{2022}}, } @inproceedings{37426, author = {{Beimdiek, Janis and Schmid, Hans-Joachim}}, booktitle = {{IAC 2022 Book of Abstracts}}, location = {{Athens}}, title = {{{A combined flue gas cleaning system with a novel entrained flow SCR using online synthesized catalyst particles (Poster)}}}, year = {{2022}}, } @inproceedings{37430, author = {{Beimdiek, Janis and Schmid, Hans-Joachim}}, location = {{Zürich}}, title = {{{Novel entrained flow SCR using online synthesized catalyst particles in flue gas cleaning systems (oral presentation)}}}, year = {{2022}}, }