Author(s)

D.S. Li & M.R. Wisnom

Abstract

Modelling damage initiation and propagation in composites using interface elements D.S. Li, M.R. Wisnom Department of Aerospace Engineering, University of Bristol, Bristol, UK ABSTRACT An interface element is presented, which is successfully applied to the modelling of delamination and fibre/matrix debonding in composites. With the aid of the interface element, further insight into the delamination behaviour of tapered glass/epoxy specimens is obtained. The effect of friction between delaminated plies is characterised and a constant value of the fracture energy for the initiation of local delamination is evaluated. INTRODUCTION Delamination and interface debonding are common forms of damage in composites. Interface elements are a powerful tool in modelling the initiation and growth of such internal damage. The use of interface elements in a finite element analysis enables the combination of a fracture mechanics based and stress based failure model. I

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