FE modelling of a structurally stitched multilayer composite

Finite-element models are presented for a typical structurally stitched carbonfibre composite. The term 'structural' means that the stitching yarn is thick enough to form a through-the-thickness reinforcement. The influences of different model features are revealed. The stitching, on the one hand, is shown to increase the stiffness, especially its out-plane component. On the other hand, it creates prominent stress-strain concentrators