Modelling Damage Growth Using a Physically-Based and Finite Deformation Model

Abstract

A mesoscale model for fibre kinking [2] is merged with a model for matrix fracture [1]. The fibre kinking behaviour is based on fibre kinking theory and finite deformation. The nonlin-ear behaviour is pressure dependent and is modelled by combining damage and friction on the fracture plane. The damage and fibre rotation due to kinking growth affects the transverse behaviour and vice-versa. The model shows efficiency considering the high complexity mech-anisms involved. For verification the model is tested against micro-mechanical FE simulations with multi-axial stress states such as σ 22 − σ 11 and τ 12 − σ 11 and against selected component tests. The combination of both models results in a high definition and physically-based 3D constitutive model for damage growth and crash of composite materials.