Finite Element Analysis of Interfacial Debonding Damage in Fiber-Reinforced Ceramic Matrix Composites

Abstract

In this paper the composite fracture process has been simulated via the finite element method. A micromechanics model was developed to predict the stress-strain response of a SiO2f/ SiO2 composite explicitly accounting for the local damage mechanisms such as fiber fracture and interfacial debonding. The effects of interfacial strength and fiber volume fraction on the toughness of fiber-reinforced ceramic matrix composites were investigated. The results showed that the composite failure behaviors correlated with the interface strength, which could achieve an optimum value for the elevation of the composite toughness. The increase of fiber volume fraction can make more toughening contributions.

Optimal Design for Mechanical Properties of Composite with Combination of Genetic Algorithm and Artificial Neural Network

“…The relationships (as showed in Fig. 2) between optimal parameters and objective properties are given by previous works [4,[7][8].…”

“…Two-and-a-half-dimensional (2.5D) braided composite is a special textile composite, in which the characteristics of the weave technique make the fabric perform particularly suitable for conforming to the mould surface of dome-shaped components, and allow net or near-net shaping [1]. Microstructure, elastic moduli [1][2][3][4], interface feature [5][6] and fracture behavior [7] of 2.5D braided composites have been widely researched through experimental and theoretical methods. However, mechanical properties of 2.5D composites are so complicated that the optimization design of such materials is still of great necessity.…”