A coupled micro–meso-scale study on the damage mechanism of 2D SiC/SiC ceramic matrix composites

Abstract

A coupled micro–meso-scale modeling strategy is proposed to investigate the damage mechanism of 2D SiC/SiC ceramic matrix composites. The multi-scale modeling begins with microstructure construction using the representative volume elements (RVE). The effective properties of the SiC/SiC yarn are computed using the micro-scale RVE model. At meso-scale, the Tsai-Wu and Mohr’s failure criteria are used to describe the different failure modes of yarn and matrix. A satisfied agreement with experimental results obtained by uniaxial tension tests validates the proposed multi-scale modeling strategy. The damage behavior of 2D SiC/SiC composites under in-plane shear loading is further investigated.

Keywords:

• SiC/SiC composites
• damage mechanism
• progressive damage
• microstructure modeling
• representative volume element
• finite element method

Additional information

Funding

This work was supported by the National Key Research and Development Program of China (2017YFB1102800) and the National Natural Science Foundation of China (11872310, 51761145111, and 51821091).