@inproceedings{21593, author = {{Yigitbas, Enes and Jovanovikj, Ivan and Engels, Gregor}}, booktitle = {{Proceedings of the 18th IFIP TC13 International Conference on Human-Computer Interaction (INTERACT 2021) }}, publisher = {{Springer}}, title = {{{Simplifying Robot Programming using Augmented Reality and End-User Development}}}, year = {{2021}}, } @inproceedings{21707, author = {{Yigitbas, Enes and Sauer, Stefan and Engels, Gregor}}, booktitle = {{Proceedings of the 13th ACM SIGCHI Symposium on Engineering Interactive Computing Systems (EICS 2021)}}, publisher = {{ACM}}, title = {{{Using Augmented Reality for Enhancing Planning and Measurements in the Scaffolding Business}}}, year = {{2021}}, } @inproceedings{22706, author = {{Yigitbas, Enes and Gorissen, Simon and Weidmann, Nils and Engels, Gregor}}, booktitle = {{Proceedings of the 24th International Conference on Model Driven Engineering Languages and Systems (MODELS'21) }}, publisher = {{ACM/IEEE}}, title = {{{Collaborative Software Modeling in Virtual Reality}}}, year = {{2021}}, } @unpublished{30866, abstract = {{Automated machine learning (AutoML) strives for the automatic configuration of machine learning algorithms and their composition into an overall (software) solution - a machine learning pipeline - tailored to the learning task (dataset) at hand. Over the last decade, AutoML has developed into an independent research field with hundreds of contributions. While AutoML offers many prospects, it is also known to be quite resource-intensive, which is one of its major points of criticism. The primary cause for a high resource consumption is that many approaches rely on the (costly) evaluation of many machine learning pipelines while searching for good candidates. This problem is amplified in the context of research on AutoML methods, due to large scale experiments conducted with many datasets and approaches, each of them being run with several repetitions to rule out random effects. In the spirit of recent work on Green AI, this paper is written in an attempt to raise the awareness of AutoML researchers for the problem and to elaborate on possible remedies. To this end, we identify four categories of actions the community may take towards more sustainable research on AutoML, i.e. Green AutoML: design of AutoML systems, benchmarking, transparency and research incentives.}}, author = {{Tornede, Tanja and Tornede, Alexander and Hanselle, Jonas Manuel and Wever, Marcel Dominik and Mohr, Felix and Hüllermeier, Eyke}}, booktitle = {{arXiv:2111.05850}}, title = {{{Towards Green Automated Machine Learning: Status Quo and Future Directions}}}, year = {{2021}}, } @article{23944, author = {{Moritzer, Elmar and Richters, Maximilian}}, journal = {{Journal of Applied Polymer Science}}, publisher = {{Wiley }}, title = {{{Characterization of wood-filled thermoplastic polyurethane for the injection modling process}}}, year = {{2021}}, } @article{23948, author = {{Moritzer, Elmar and Richters, Maximilian and Hillemeyer, Johannes and Krassmann, Dimitri}}, journal = {{Joining Plastics}}, title = {{{Mit dem Schraubblind-Durchsetznieten Metallteile mit Composites bei einseitiger Zugänglichkeit verbinden}}}, year = {{2021}}, } @book{22032, abstract = {{The Arburg Plastic Freeforming (APF) is an additive manufacturing process which allows the production of three-dimensional thermoplastic components in layers. The components are produced by depositing fine, molten plastic droplets. The main advantage of the APF is the open-parameter control of the associated machine system. Thus, the process parameters can be optimized for individual applications. A special and new application of the APF is the production of interconnecting porous structures. As this is a novel approach with this manufacturing process, the general producibility and reproducibility must first be proven. Therefore, the relevant process parameters with an influence on the open-pored structures are identified. The volume of the individual plastic droplets, the distance between the droplets and the layer thickness are the three decisive influencing factors. With the use of analysis methods, the free spaces created in the structure are described by a uniformly constructed, interconnected pore structure. This means that the pores are interconnected in three dimensions. Reproducibility is evaluated by repeated production and thru the changed conditions during the manufacturing process. In addition, the multiplication and a change of geometry are evaluated in such a way that there is no influence on the pore size. Irregularities when depositing the first layer are caused by unevenness of the building platform. A suitable test arrangement is set up to determine the liquid permeability. A characteristic value is determined to describe the permeability to liquids.}}, author = {{Moritzer, Elmar and Hirsch, André and Dalmer, C.}}, isbn = {{978-3-030-54333-4}}, pages = {{112--129}}, publisher = {{Springer}}, title = {{{Investigation of Plastic Freeformed, Open-Pored Structures with Regard to Producibility, Reproducibility and Liquid Permeability}}}, doi = {{10.1007/978-3-030-54334-1}}, year = {{2021}}, } @article{24162, author = {{Moritzer, Elmar and Wächter, Julian and Elsner, Christian Lennart}}, journal = {{Macromolecular Symposia}}, number = {{1}}, publisher = {{Wiley}}, title = {{{Investigation of Specific FDM Process Parameters to Optimize the Polymer Discharge of Carbon Fiber Reinforced PEEK}}}, doi = {{10.1002/masy.202000269}}, volume = {{395}}, year = {{2021}}, } @article{24681, author = {{Moritzer, Elmar and Schumacher, Christian}}, issn = {{1022-1360}}, journal = {{Macromolecular Symposia}}, number = {{1}}, title = {{{Stainless Steel Parts Produced by Fused Deposition Modeling and a Sintering Process Compared to Components Manufactured in Selective Laser Melting}}}, doi = {{10.1002/masy.202000275}}, volume = {{395}}, year = {{2021}}, } @inproceedings{24554, author = {{Moritzer, Elmar and Elsner, Christian Lennart and Wächter, Julian and Knoop, Frederick}}, booktitle = {{79th Annual Technical Conference of the Society of Plastics Engineers (ANTEC)}}, title = {{{Investigation and Realization of Watertight FDM Structures Made of Ultem 9085 in Pressurized Systems}}}, year = {{2021}}, } @article{23867, abstract = {{The joining of plastics is required because component geometries are severely restricted in conventional manufacturing processes such as injection molding or extrusion. In addition to established processes such as hot plate welding, infrared welding, or vibration welding, hot gas butt welding is becoming more and more important industrially due to its advantages. The main benefits are the contactless heating process, the suitability for glass fiber reinforced, and high-temperature plastics as well as complex component geometries. However, various degradation phenomena can occur during the heating process used for economic reasons, due to the presence of oxygen in the air and to the high gas temperatures. In addition, the current patent situation suggests that welding with an oxidizing gas is not permissible depending on the material. On the other hand, however, there is experience from extrusion welding, with which long-term resistant weld seams can be produced using air. Investigations have shown that the same weld seam properties can be achieved with polypropylene using either air or nitrogen as the process gas. Experimental investigations have now been carried out on the suitability of different gases with regard to the weld seam quality when welding polyamides, which are generally regarded as more prone to oxidation. The results show that weld strengths are higher when nitrogen is used as process gas. However, equal weld strengths can be achieved with air and nitrogen when the material contains heat stabilizers.}}, author = {{Bialaschik, Max and Schöppner, Volker and Albrecht, Mirko and Gehde, Michael}}, issn = {{0043-2288}}, journal = {{Welding in the World}}, pages = {{1161--1169}}, title = {{{Influence of material degradation on weld seam quality in hot gas butt welding of polyamides}}}, doi = {{10.1007/s40194-021-01108-0}}, year = {{2021}}, } @article{24555, author = {{Moritzer, Elmar and Elsner, Christian Lennart and Schumacher, Christian}}, issn = {{0272-8397}}, journal = {{Polymer Composites}}, number = {{11}}, pages = {{6065--6079}}, title = {{{Investigation of Metal‐Polymer Composites Manufactured by Fused Deposition Modeling with Regard to Process Parameters}}}, doi = {{10.1002/pc.26285}}, volume = {{42}}, year = {{2021}}, } @article{24131, abstract = {{Glass/carbon fiber reinforced plastic (GFRP/CFRP) and hybrid components have attracted increasing attention in lightweight applications. However, residual stresses induced in the manufacturing process of these components can result in warpage and, eventually, negatively affect the mechanical performance of the composite structures. In the present work, GFRP, CFRP, GFRP/steel and CFRP/steel hybrid components were manufactured through the prepreg-press-technology always employing the same process parameters. The residual stresses of these components were measured through the hole drilling method (HDM), based on an adequate formalism to evaluate the residual stresses for orthotropic materials including the calculation of the calibration coefficients via finite element analysis (FEA). In FEA, the real material lay-up and mechanical properties of the samples were considered. The warpage induced by residual stresses was measured after the samples were removed from the tool. The measured residual stresses and warpage of four different types of samples were compared and results were analyzed in depth. The results obtained can be extended to other hybrid materials and even could be used for designing multi-stable laminates for application in adaptive structures. Moreover, the effects of the drilling process parameters of HDM, e.g., the drilling speed, the drilling increment and the zero-depth setting, on the resulting residual stresses of GFRP were investigated. The reliability of residual stress measurements in GFRP using HDM was validated through mechanical bending tests. The conclusions concerning the choice of optimal drilling parameters for GFRP could be directly applied for other types of samples considered in the present work.}}, author = {{Wu, Tao and Tinkloh, Steffen Rainer and Tröster, Thomas and Zinn, Wolfgang and Niendorf, Thomas}}, issn = {{2075-4701}}, journal = {{Metals}}, title = {{{Measurement and Analysis of Residual Stresses and Warpage in Fiber Reinforced Plastic and Hybrid Components}}}, doi = {{10.3390/met11020335}}, year = {{2021}}, } @article{21064, author = {{Tinkloh, Steffen Rainer and Wu, Tao and Tröster, Thomas and Niendorf, Thomas}}, issn = {{2075-4701}}, journal = {{Metals}}, title = {{{The Effect of Fiber Waviness on the Residual Stress State and Its Prediction by the Hole Drilling Method in Fiber Metal Laminates: A Global-Local Finite Element Analysis}}}, doi = {{10.3390/met11010156}}, year = {{2021}}, } @inproceedings{21093, abstract = {{Requirements for energy distribution networks are changing fast due to the growing share of renewable energy, increasing electrification, and novel consumer and asset technologies. Since uncertainties about future developments increase planning difficulty, flexibility potentials such as synergies between the electricity, gas, heat, and transport sector often remain unused. In this paper, we therefore present a novel module-based concept for a decision support system that helps distribution network planners to identify cross-sectoral synergies and to select optimal network assets such as transformers, cables, pipes, energy storage systems or energy conversion technology. The concept enables long-term transformation plans and supports distribution network planners in designing reliable, sustainable and cost-efficient distribution networks for future demands.}}, author = {{Kirchhoff, Jonas and Burmeister, Sascha Christian and Weskamp, Christoph and Engels, Gregor}}, booktitle = {{Energy Informatics and Electro Mobility ICT}}, editor = {{Breitner, Michael H. and Lehnhoff, Sebastian and Nieße, Astrid and Staudt, Philipp and Weinhardt, Christof and Werth, Oliver}}, title = {{{Towards a Decision Support System for Cross-Sectoral Energy Distribution Network Planning}}}, year = {{2021}}, } @misc{31744, author = {{Moritzer, Elmar and Hillemeyer, Johannes and Kramer, M. and Hopmann, C.}}, booktitle = {{Joining Plastics}}, issn = {{1864-3450}}, pages = {{94--103}}, title = {{{Designing of thermosetting plastic components for direct screwing - Auslegung von Duroplastbauteilen zur Direktverschraubung}}}, year = {{2021}}, } @misc{31740, author = {{Moritzer, Elmar and Richters, Maximilian}}, booktitle = {{Journal of Applied Polymer Science}}, number = {{38}}, title = {{{ Characterization of wood-filled thermoplastic polyurethanes for the injection molding process}}}, volume = {{138}}, year = {{2021}}, } @inproceedings{31760, author = {{Moritzer, Elmar and Krassmann, Dimitri and Brikmann, Johannes}}, booktitle = {{11. Fügetechnisches Gemeinschaftskolloquium}}, location = {{Dresden}}, title = {{{Entwicklung der Spritzniettechnik als werkstoffgerechtes Fügeverfahren für hybride Strukturen}}}, year = {{2021}}, } @misc{31762, author = {{Moritzer, Elmar and Jilg, J. and Rücker, Tobias}}, booktitle = {{Kunststoffe}}, pages = {{24--27}}, title = {{{Er kommt auf die Korngröße an, Mikrogranulat verbessert die Verteilung feindisperser Füllstoffe in der Direktcompoundierung}}}, year = {{2021}}, } @misc{31758, author = {{Schöppner, Volker and Martens, Jan Hendrik}}, booktitle = {{Kunststoffe}}, issn = {{0023- 5563}}, pages = {{91--93}}, title = {{{Eine runde Sache}}}, year = {{2021}}, }