A multi-scale stochastic model for damage analysis and performance dispersion study of a 2.5D fiber-reinforced ceramic matrix composites

• DOI: 10.1016/j.compstruct.2020.112549
• Publication Date: 2020-05-30T23:36:50Z
• Authors: Duoqi Shi; Xuefeng Teng; Xin Jing; Shuangqi Lyu; Xiaoguang Yang
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract This paper presents a stochastic approach to study the damage evolution and performance dispersion of a 2.5D woven fiber-reinforced ceramic matrix composite in a multi-scale framework. The mechanical behavior of the composite depends on the constituent properties, fiber volume fraction, weave architecture and loading conditions. The dispersion behavior of the material was investigated with: i) a full-thickness meso-scale representative volume element (RVE) model which is established based on the weave architecture of the material, and ii) the Monte-Carlo method to obtain the effective mechanical properties of the material which are influenced by the dispersion in its constituents. The simulations reveal the damage initiation and propagation process of the material at micro/meso-scale. The results show that there are significant relationships between the constituent properties and the effective mechanical properties; the effective properties of material can be predicted with small errors, which would guide the design and optimization of composite materials.