TY - JOUR
AB - 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.
AU - Steinfelder, Christian
AU - Martin, Sven
AU - Brosius, Alexander
AU - Tröster, Thomas
ID - 24541
JF - Key Engineering Materials
SN - 1662-9795
TI - Load Path Transmission in Joining Elements
ER -
TY - JOUR
AU - Martin, Sven
AU - Tröster, Thomas
ID - 24548
JF - ESAFORM 2021
TI - Joint point loadings in car bodies – the influence of manufacturing tolerances and scatter in material properties
ER -
TY - CONF
AU - Stallmeister, Tim
AU - Martin, Sven
AU - Marten, Thorsten
AU - Tröster, Thomas
ID - 26994
TI - Experimental investigation on lightweight potentials of fiber-metal-laminates for automotive battery cases
ER -
TY - CONF
AU - Dörner, Marius
AU - Schöppner, Volker
ID - 23835
T2 - ANTEC 21
TI - Development of an Analytical Mathematical Modelling Approach for a More Precise Description of Disperse Melting in Solid Bed Breaking Screw Concepts
ER -
TY - JOUR
AU - Moritzer, Elmar
AU - Richters, Maximilian
ID - 31769
IS - 12
JF - Journal of Composites Science
SN - 2504-477X
TI - Injection Molding of Wood-Filled Thermoplastic Polyurethane
ER -
TY - JOUR
AU - Moritzer, Elmar
AU - Krassmann, Dimitri
ID - 31757
JF - Welding in the World
TI - Development of a new joining technology for hybrid joints of sheet metal and continuous fiber-reinforced thermoplastics
ER -
TY - CONF
AU - Rozo Vasquez, Julian
AU - Arian, Bahman
AU - Riepold, Markus
AU - Walther, Frank
AU - Homberg, Werner
AU - Trächtler, Ansgar
ID - 30297
T2 - Proceedings of the 11th International Workshop NDT in Progress
TI - Magnetic Barkhausen noise analysis for microstructural effects separation during flow forming of metastable austenite 304L.
ER -
TY - CONF
AB - 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.
AU - Arian, Bahman
AU - Homberg, Werner
AU - Riepold, Markus
AU - Trächtler, Ansgar
AU - Rozo Vasquez, Julian
AU - Walther, Frank
ID - 23465
KW - Flow-forming
KW - Spinning
KW - Process Strategy
KW - Martensite Content
KW - Property Control
KW - Micromagnetic Measurement
KW - Metastable Austenitic Stainless Steel
SN - 978-2-87019-302-0
TI - Forming of metastable austenitic stainless steel tubes with axially graded martensite content by flow-forming
ER -
TY - CHAP
AU - Ahrens, Stephan
ED - Jakob, Reinhard
ID - 44367
T2 - Lichtspiele. Kino und Film im Brucker Land von den Anfängen bis zum Siegeszug des Fernsehens.
TI - Francesco (Franz) Stefani - Ein Regisseur mit barocken Anklägen.
ER -
TY - JOUR
AB - AbstractIn child–robot interaction (cHRI) research, many studies pursue the goal to develop interactive systems that can be applied in everyday settings. For early education, increasingly, the setting of a kindergarten is targeted. However, when cHRI and research are brought into a kindergarten, a range of ethical and related procedural aspects have to be considered and dealt with. While ethical models elaborated within other human–robot interaction settings, e.g., assisted living contexts, can provide some important indicators for relevant issues, we argue that it is important to start developing a systematic approach to identify and tackle those ethical issues which rise with cHRI in kindergarten settings on a more global level and address the impact of the technology from a macroperspective beyond the effects on the individual. Based on our experience in conducting studies with children in general and pedagogical considerations on the role of the institution of kindergarten in specific, in this paper, we enfold some relevant aspects that have barely been addressed in an explicit way in current cHRI research. Four areas are analyzed and key ethical issues are identified in each area: (1) the institutional setting of a kindergarten, (2) children as a vulnerable group, (3) the caregivers’ role, and (4) pedagogical concepts. With our considerations, we aim at (i) broadening the methodology of the current studies within the area of cHRI, (ii) revalidate it based on our comprehensive empirical experience with research in kindergarten settings, both laboratory and real-world contexts, and (iii) provide a framework for the development of a more systematic approach to address the ethical issues in cHRI research within kindergarten settings.
AU - Tolksdorf, Nils Frederik
AU - Siebert, Scarlet
AU - Zorn, Isabel
AU - Horwath, Ilona
AU - Rohlfing, Katharina J.
ID - 24901
JF - International Journal of Social Robotics
SN - 1875-4791
TI - Ethical Considerations of Applying Robots in Kindergarten Settings: Towards an Approach from a Macroperspective
ER -