Abstract

A residually stressed aluminum fiber metal laminate (Glare) with delaminations, caused by co-existence of normal cracks in aluminum layers and transverse interfacial cracks between aluminum and fiber layers, is theoretically and numerically investigated under monotonic and cyclic loads of constant amplitude. Double and multiple delaminations, governed by various types of debonding curves, are modeled with the help of cohesive elements. Role of fibers in load or fiber bridging over the cracks leading to enhanced fracture and fatigue properties of the laminate is demonstrated and validated. Magnitude of shielding effect at normal crack tip is quantified by stress intensity parameter and J integral values. Influence of delamination growth parameters on fiber bridging and stress state in aluminum layers is also examined. Theoretical and numerical results support each other well.

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