Modelling of splitting and delamination in notched cross-ply laminates

A finite-element approach has been developed for modelling the detailed damage development in notched composites. Separate elements are used for each ply, connected together with interface elements to allow delamination between the plies. Interface elements are also used to model splitting at the notch. The approach is applied to a cross-ply laminate with a centre crack loaded in tension, and the results compared with experimental measurements. The model accurately predicts the development of a narrow triangular delamination zone, and the extent of splitting as a function of applied tensile stress. The approach offers scope for improved simulation and understanding of the complex failure processes in notched composites.