In-Situ Computed Tomography — Analysis of a Single-Lap Shear Test with Composite-Metal Pin Joints

Abstract Lightweight design in the form of intelligent multi-material structures that combine advantages high strength steel and continuous fibre reinforced thermoplastics (CFRTs) gain increasing relevance. In this context, joining operation is a major challenge as it has to be time cost efficient resulting joint exhibit mechanical durability. One possible approach use cold formed pin structures, which can inserted into CFRT create fitting under avoidance damage commonly case for bolted or riveted joints. The deformation phenomena joints are usually investigated by macrosectioning (ex-situ) computed tomography. However, due resetting elastic deformations cracks close after unloading an inaccurate state inner structure measured. Furthermore, investigation different stages with load progressing failure very consuming, because multiple samples have tested investigated. Alternatively, in-situ tomography (in-situ CT) used investigate testing paper, method CT analysis single-lap shear test composite-metal presented. pins plastically extruded height approx. 1.8 mm from metal sheet (1.5 thick) pressed locally heated glass thermoplastic (FRT) (approx. 2 creating fit. Specimens quasi-unidirectional reinforcement 0° 90° direction tested. With procedure, three-dimensional observed identified each respectively. Thus, also validating numerical simulations.