@inproceedings{30221, author = {{Neukötter, Moritz and Jesinghausen, Steffen and Schmid, Hans-Joachim}}, location = {{Online}}, title = {{{Filament Extension Atomization – A novel Process for Powder Production? (Presentation)}}}, year = {{2021}}, } @inproceedings{26390, author = {{Moritzer, Elmar and Flachmann, Felix}}, booktitle = {{PPS-36 Proceedings}}, location = {{Montreal}}, title = {{{Process-reliable Injection Molding of Highly Filled Wood-Plastic-Composites (WPC)}}}, year = {{2021}}, } @article{22265, author = {{Grabo, Matti and Acar, Emre and Kenig, Eugeny}}, issn = {{0960-1481}}, journal = {{Renewable Energy}}, pages = {{1087--1097}}, title = {{{Modeling and improvement of a packed bed latent heat storage filled with non-spherical encapsulated PCM-Elements}}}, doi = {{10.1016/j.renene.2021.04.022}}, volume = {{173}}, year = {{2021}}, } @inproceedings{21477, author = {{Rostek, Tim and Makeieva, Hanna and Homberg, Werner}}, booktitle = {{Proceedings of the 13th International Conference on the Technology of Plasticity}}, editor = {{Daehn, G. and Cao, J. and Kinsey, B. and Tekkaya, A. E. and Vivek, A. and Yoshida, Y}}, isbn = {{978-3-030-75380-1}}, location = {{Columbus}}, pages = {{2115--2125}}, publisher = {{Springer, Cham}}, title = {{{Cutting Blades for Food Processing Applications Manufactured Using Innovative Spin Forming}}}, doi = {{10.1007/978-3-030-75381-8_178}}, year = {{2021}}, } @article{22798, abstract = {{The predictive quality of numerical simulations for mechanical joining processes depends on the implemented material model, especially regarding the plasticity of the joining parts. Therefore, experimental material characterization processes are conducted to determine the material properties of sheet metal and generate flow curves. In this regard, there are a number of procedures which are accompanied by varying experimental efforts. This paper presents various methods of determining flow curves for HCT590X as well as EN AW-6014, including varying specimen geometries and diverse hardening laws for extrapolation procedures. The flow curves thus generated are compared considering the variety of plastic strains occurring in mechanical joining processes. The material data generated are implemented in simulation models for the joining technologies, clinching and self-piercing riveting. The influence of the varied methods on the predictive accuracy of the simulation model is analysed. The evaluation of the differing flow curves is achieved by comparing the geometric formation of the joints and the required joining forces of the processes with experimentally investigated joints.}}, author = {{Böhnke, Max and Kappe, Fabian and Bobbert, Mathias and Meschut, Gerson}}, issn = {{2195-8572}}, journal = {{Materials Testing}}, number = {{6}}, pages = {{493--500}}, publisher = {{De Gruyter}}, title = {{{Influence of various procedures for the determination of flow curves on the predictive accuracy of numerical simulations for mechanical joining processes}}}, doi = {{10.1515/mt-2020-0082}}, volume = {{63}}, year = {{2021}}, } @article{34226, abstract = {{The increasing use of multi-material constructions lead to a continuous increase in the use of mechanical joining techniques due to the wide range of joining possibilities as well as the high load-bearing capacities of the joints. Nevertheless, the currently rigid tool systems are not able to react to changing boundary conditions, like changing the material-geometry-combination. Therefore research work is crucial with regard to versatile joining systems. In this paper, a new approach for a versatile self-piercing riveting process considering the joining system as well as the auxiliary joining part is presented.}}, author = {{Kappe, Fabian and Bobbert, Mathias and Meschut, Gerson}}, issn = {{1662-9795}}, journal = {{Key Engineering Materials}}, keywords = {{Mechanical Engineering, Mechanics of Materials, General Materials Science}}, pages = {{3--10}}, publisher = {{Trans Tech Publications, Ltd.}}, title = {{{New Approach for Versatile Self Piercing Riveting: Joining System and Auxiliary Part}}}, doi = {{10.4028/www.scientific.net/kem.883.3}}, volume = {{883}}, year = {{2021}}, } @inbook{22766, author = {{Dahms, Frederik and Homberg, Werner}}, booktitle = {{Forming the Future}}, issn = {{2367-1181}}, location = {{Ohio, USA, VIRTUAL EVENT}}, pages = {{2249--2259}}, publisher = {{Springer, Cham}}, title = {{{Investigations and Improvements in 3D-DIC Optical Residual Stress Analysis—A New Temperature Compensation Method}}}, doi = {{10.1007/978-3-030-75381-8_189}}, year = {{2021}}, } @article{20921, abstract = {{The increase of the thermal conductivity of PUR foam in the insulation of the cabinet is an important cause for aging processes of household refrigerating appliances. To determine the influence of the PUR foam aging on energy consumption, the development of a new measurement method is necessary be- cause current methods influence the aging behavior of household refrigerators and are therefore not applicable in general. Based on a latent heat sink, constructed as an ice water bucket, a new measure- ment method is developed to determine the k ·A value over time. With this method, the k ·A value of four household refrigerating appliances was determined over an interval of 14 months. The k ·A value increased between 3.6% and 11.5% during this period.}}, author = {{Paul, Andreas and Baumhögger, Elmar and Elsner, Andreas and Moczarski, Lukas and Reineke, Michael and Sonnenrein, Gerrit and Hueppe, Christian and Stamminger, Rainer and Hoelscher, Heike and Wagner, Hendrik and Gries, Ulrich and Freiberger, Alfred and Becker, Wolfgang and Vrabec, Jadran}}, issn = {{0140-7007}}, journal = {{International Journal of Refrigeration}}, pages = {{235--242}}, title = {{{Determining the heat flow through the cabinet walls of household refrigerating appliances}}}, doi = {{10.1016/j.ijrefrig.2020.10.007}}, year = {{2021}}, } @article{27290, abstract = {{Domestic refrigeration appliances are standard household commodities. Although policies, such as the energy labelling, prompted technical improvements and decreased appliance energy consumption throughout recent decades, important parameters were disregarded. These refer to the efficiency loss over time and the consumer behaviour. The objective of this contribution was to develop a dynamic energy model to determine the power consumption of refrigeration appliances considering degradation factors and behaviour. These were included by model parameters for direct consumer interactions, such as the storage behaviour, door openings and temperature setting, as well as indirect actions, e.g. exposing an appliance to specific temperature conditions at an installation site. For this, an online-survey was conducted to evaluate the consumer behaviour. A total of 706 consumers participated in the national questionnaire, serving as input for the dynamic energy model. It was found that the efficiency loss increases the power consumption by at least 1% annually, leading to an excess of 10% after 10 years of usage. Another important finding was that 32.5% of appliance’s power consumption results from consumer behaviour, whereas the promotion of behavioural changes leads to a significant decrease of the consumer-induced consumption. Consequently, this study provides a tool to evaluate the impact of policies targeting refrigeration appliances, stressing that efficiency loss and behaviour should be integrated into future policy approaches.}}, author = {{Hueppe, Christian and Geppert, Jasmin and Moenninghoff-Juessen, Julia and Wolff, Lena and Stamminger, Rainer and Paul, Andreas and Elsner, Andreas and Vrabec, Jadran and Wagner, Hendrik and Hoelscher, Heike and Becker, Wolfgang and Gries, Ulrich and Freiberger, Alfred}}, issn = {{0301-4215}}, journal = {{Energy Policy}}, title = {{{Investigating the real life energy consumption of refrigeration appliances in Germany: Are present policies sufficient?}}}, doi = {{10.1016/j.enpol.2021.112275}}, year = {{2021}}, } @inproceedings{22264, author = {{Göddecke, Johannes and Meschut, Gerson}}, booktitle = {{11. Doktorandenseminar Klebtechnik}}, location = {{Aachen}}, publisher = {{DVS Media GmbH}}, title = {{{Experimentelle Untersuchung der Dämpfungseigenschaften geklebter Strukturen unter dynamischer Beanspruchung}}}, year = {{2021}}, } @article{24541, abstract = {{The mechanical properties of joined structures are determined considerably by the chosen joining technology. With the aim of providing a method that enables a faster and more profound decision-making in the spatial distribution of joining points during product development, a new method for the load path analysis of joining points is presented. For an exemplary car body, the load type in the joining elements, i.e. pure tensile, shear and combined tensile-shear loads, is determined using finite element analysis (FEA). Based on the evaluated loads, the resulting load paths in selected joining points are analyzed using a 2D FE-model of a clinching point. State of the art methods for load path analysis are dependent on the selected coordinate system or the existing stress state. Thus, a general statement about the load transmission path is not possible at this time. Here, a novel method for the analysis of load paths is used, which is independent of the alignment of the analyzed geometry. The basic assumption of the new load path analysis method was confirmed by using a simple specimen with a square hole in different orientations. The results presented here show a possibility to display the load transmission path invariantly. In further steps, the method will be extended for 3D analysis and the investigation of more complex assemblies. The primary goal of this methodical approach is an even load distribution over the joining elements and the component. This will provide a basis for future design approaches aimed at reducing the number of joining elements in joined structures.}}, author = {{Steinfelder, Christian and Martin, Sven and Brosius, Alexander and Tröster, Thomas}}, issn = {{1662-9795}}, journal = {{Key Engineering Materials}}, pages = {{73--80}}, title = {{{Load Path Transmission in Joining Elements}}}, doi = {{10.4028/www.scientific.net/kem.883.73}}, year = {{2021}}, } @article{24548, author = {{Martin, Sven and Tröster, Thomas}}, journal = {{ESAFORM 2021}}, title = {{{Joint point loadings in car bodies – the influence of manufacturing tolerances and scatter in material properties}}}, doi = {{10.25518/esaform21.3801}}, year = {{2021}}, } @inproceedings{26994, author = {{Stallmeister, Tim and Martin, Sven and Marten, Thorsten and Tröster, Thomas}}, location = {{Bad Nauheim}}, title = {{{Experimental investigation on lightweight potentials of fiber-metal-laminates for automotive battery cases}}}, year = {{2021}}, } @inproceedings{23835, author = {{Dörner, Marius and Schöppner, Volker}}, booktitle = {{ANTEC 21}}, title = {{{Development of an Analytical Mathematical Modelling Approach for a More Precise Description of Disperse Melting in Solid Bed Breaking Screw Concepts}}}, year = {{2021}}, } @article{31769, author = {{Moritzer, Elmar and Richters, Maximilian}}, issn = {{2504-477X}}, journal = {{ Journal of Composites Science}}, number = {{12}}, title = {{{Injection Molding of Wood-Filled Thermoplastic Polyurethane}}}, year = {{2021}}, } @article{31757, author = {{Moritzer, Elmar and Krassmann, Dimitri}}, journal = {{Welding in the World}}, title = {{{Development of a new joining technology for hybrid joints of sheet metal and continuous fiber-reinforced thermoplastics}}}, year = {{2021}}, } @inproceedings{30297, author = {{Rozo Vasquez, Julian and Arian, Bahman and Riepold, Markus and Walther, Frank and Homberg, Werner and Trächtler, Ansgar}}, booktitle = {{Proceedings of the 11th International Work­shop NDT in Progress}}, location = {{Prague}}, title = {{{Magnetic Barkhausen noise analysis for microstructural effects separation during flow forming of metastable austenite 304L.}}}, year = {{2021}}, } @inproceedings{23465, abstract = {{One of the main objectives of production engineering is to reproducibly manufacture (complex) defect-free parts. To achieve this, it is necessary to employ an appropriate process or tool design. While this will generally prove successful, it cannot, however, offset stochastic defects with local variations in material properties. Closed-loop process control represents a promising approach for a solution in this context. The state of the art involves using this approach to control geometric parameters such as a length. So far, no research or applications have been conducted with closed-loop control for microstructure and product properties. In the project on which this paper is based, the local martensite content of parts is to be adjusted in a highly precise and reproducible manner. The forming process employed is a special, property-controlled flow-forming process. A model-based controller is thus to generate corresponding correction values for the tool-path geometry and tool-path velocity on the basis of online martensite content measurements. For the controller model, it is planned to use a special process or microstructure (correlation) model. The planned paper not only describes the experimental setup but also presents results of initial experimental investigations for subsequent use in the closed-loop control of α’-martensite content during flow-forming.}}, author = {{Arian, Bahman and Homberg, Werner and Riepold, Markus and Trächtler, Ansgar and Rozo Vasquez, Julian and Walther, Frank}}, isbn = {{978-2-87019-302-0}}, keywords = {{Flow-forming, Spinning, Process Strategy, Martensite Content, Property Control, Micromagnetic Measurement, Metastable Austenitic Stainless Steel}}, location = {{Liège, Belgium}}, publisher = {{ULiège Library}}, title = {{{Forming of metastable austenitic stainless steel tubes with axially graded martensite content by flow-forming}}}, year = {{2021}}, } @article{24383, author = {{Wübbeke, Andrea and Schöppner, Volker and Arndt, Theresa and Maras, Jan-Ole and Fitze, Marcus and Moltzahn, Christian and Wu, Tao and Niendorf, Thomas}}, journal = {{Polymers}}, publisher = {{MDPI}}, title = {{{Effect of nucleating additives on short- and long-term tensile strength and residual stresses of welded polypropylene samples }}}, year = {{2021}}, } @phdthesis{37632, author = {{Wübbeke, Andrea}}, title = {{{Prozess-Struktur-Eigenschaftsbeziehung beim Heizelementschweißen von Polypropylen}}}, year = {{2021}}, }