Study on arall failure behaviour under tensile loading

This paper studies the failure behaviour of ARALL (Aramid Aluminum Laminate) under tensile loading by means of acoustic emission (AE), optical metallography (OM) and scanning electronic microscope (SEM), and analyzes the fracture appearance of ARALL and its fracture characteristics. The damage models of ARALL are concluded in this paper. The results show that ARALL will yield under tensile loading, and its strength will decrease as the content of resin increases. During fracture process, AE amplitude distribution curves show that there are three obvious peaks, which respectively correspond to separation of the interface between fibers and resin, local delamination damage and fracture of a small quantity of fibers, and delamination damage of large area and final fracture of a large numbers of fibers. Dynamic damage and fracture process of ARALL can be detected by AE.