Material Design for High Strength of Continuous Fiber-Reinforced and Reaction-Sintered SiC Matrix Composites by Paying Attention to Fiber-Pullout Behavior.

Abstract

Interfacial debonding behaviors between fiber and matrix in continuous fiber-reinforced reaction-sintered SiC matrix composites have been analyzed in terms of strain energy release rate using a finite element method. In particular, the effects of Young's modulus ratio, Em/Ef, and fiber volume fraction, Vf, on the strain energy release rate have been investigated. As a result, it was confirmed that the steady-state strain release rate increased with increasing the Young's modulus ratio and decreasing the fiber volume fraction. Also, it was clarified that the quasi-yield state like carbon steels observed in stress-strain curve was explainable by the strain energy release rate of interfacial debonding between fiber and matrix.