Modeling Damage Modes in 3-D Woven Armor Composite Systems; Conference paper

摘要

In this paper a computationally intensive, multi-scale model exhibiting progressive damage in a 3D-woven composite is considered. It is based on evolving some fundamental damage modes in a representative volume element (RVE) of the composite's actual woven architecture. The evolving damage modes affect the local stresses in the composite micro-structure and eventually the overall stresses in the composite. This effect is considered in the RVE via a transformation field analysis (TFA). Since the model is computationally intensive, its numerical requirements in modeling the local microstructure, e.g. the mesh size, are to be understood before it can successfully be used in armor lay-up design studies or in conjunction with Lagrangian impact codes such as DYNA3D. This is a convergence issue which has not been studied before in RVE- TFA theories which use separate meshes at local and global levels. This paper examines the effect of the local micro-mesh size on modeling the weave-level damage progression in the 3D woven composites.