Damage tolerance assessment by bend and shear tests of two multilayer composites: Glass fibre reinforced metal laminate and aluminium roll-bonded laminate

摘要

The damage tolerance of an aluminium roll-bonded laminate (ALH19) and a\udglass fibre reinforced laminate (GLARE) (both based in Al 2024-T3) has been studied.\udThe composite laminates have been tested under 3-point bend and shear tests on the\udinterfaces to analyze their fracture behaviour. During the bend tests different fracture\udmechanisms were activated for both laminates, which depend on the constituent\udmaterials and their interfaces. The high intrinsic toughness of the pure Al 1050 layers\udpresent in the aluminium roll-bonded laminate (ALH19), together with extrinsic\udtoughening mechanisms such as crack bridging and interface delamination were\udresponsible for the enhanced toughness of this composite laminate. On the other hand,\udcrack deflection by debonding between the glass fibres and the plastic resin in GLARE,\udwas the main extrinsic toughening mechanism present in this composite laminate