Bimaterial laminates may produce enhanced fracture resistance in brittle and semibrittle materials. The purpose of the present work was to investigate crack stabilisation in a discontinuously reinforced aluminium (DRA) material via lamination with a ductile aluminium alloy. In particular, the crack growth behaviour of the individual DRA layers in the laminate was compared with that of an equivalent thickness DRA material tested separately. In contrast to the DRA material, the DRA laminate exhibited R curve behaviour in which stable crack growth occurred concurrent with an increased load carrying capacity after fracture initiation, producing both an increase in the toughness and the work of rupture.
MST/3520
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