Open AccessFatigue behaviour of material-adapted fibre-reinforced polymer/metal joints
Author(s) -
Colin Gerstenberger,
Tomasz Osiecki,
Lothar Kroll
Publication year - 2021
Publication title -
technologies for lightweight structures
Language(s) - English
Resource type - Journals
ISSN - 2512-4587
DOI - 10.21935/tls.v3i1.122
Subject(s) - materials science , composite material , fibre reinforced plastic , shear (geology) , tension (geology) , joint (building) , lap joint , glass fiber , structural engineering , ultimate tensile strength , engineering
By regarding the needs and requirements in modern multi-material joining, the Flow Drill Joining Concept (FDJ) was developed at the Chemnitz University of Technology. The technology allows an efficient and material-adapted joining of thin metal sheets with continuous fibre-reinforced thermoplastics, as required in modern lightweight engineering. For a better understanding of their fatigue behaviour, single-lap FDJ joints were examined in quasi-static and dynamic tests regarding shear loads, cross tension and superimposed shear/cross tension loads. By way of example, joints between micro-alloyed steel with high yield strength for cold forming and a continuous glass/carbon fibre-reinforced polyamide 6 were investigated. The fatigue curves show inclinations between k = 8.01 (shear loads) and k = 5.17 (cross tension loads), depending on the applied load angle. The results of the fatigue testings represent a basis for the enhancement of a failure criterion for FRP/metal joints in highly stressed multi-material designs.