The damage evolution of 2D-Woven-C/SiC composite under tension loading

A meso-numerical model is set up to investigate the damage evolution of 2D woven C/SiC based on RVE(representative volume element) because the woven composite has a periodic in-plane structure. Periodic boundary conditions are imposed to the model. Three material models for the fibers, the matrix, and the yarn/matrix interface are considered. Basic damage modes and their evolutions are observed in the simulation. Firstly, the matrix is damaged at the global applied stress around 50Mpa, which agrees well with the tests. The stress/strain relation obtained from the meso-numerical model can represent the behavior of the 2D woven C/SiC under tension loading. Secondly, the void in the matrix plays an important role. The bundle/matrix interface is essential to investigate the interface debonding.