Development and analysis of a joining strategy for FPC/metal mixed joints on the basis of the CMT pin welding technology
Authors: M. Sc. Oleg Shapovalov, M. Sc. Lucas Ost, Dipl.-Ing. Felix Kuke, Dr.-Ing. Nikolay Doynov, M. Sc. Marcello Ambrosio, Prof. Dr.-Ing. Holger Seidlitz, Prof. Dr.-Ing. Vesselin Michailov
This article portrays the development, adjustment and investigation of the innovative pin welding technology for the joining of thermoplastic fibre/ plastic composites with metallic joining members. In comparison with other procedures, the investigated joining technology offers not only accessibility from one side but also a high lightweight construction potential. Multimaterial single-pin joints served to characterise the CMT pin weldability and to test and evaluate different joining strategies. The investigated assessment criteria were the weld deposit as well as the fibre and matrix retention depending on the welding parameters. The mechanical stress-bearing capacities of the joints executed with the developed procedure were established in tensile shear tests. Multipin joints were subsequently used in order to investigate the influence of the pin arrangement and to analyse the designing of the joining zone. The joining process was validated on functional specimens (which, in turn, were validated in three-point bending tests) and compared with adhesive bonding.
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