Strength distribution of hybrid fibers reinforced SiC matrix composite

Based on the flexural strength of 3D (SiC-C)/SiC composite in which SiC matrix was reinforced by hybrid SiC fiber and carbon fiber fabricated by chemical vapor deposition process (CVI), assumed by the Weibull distribution, the strength distribution of (SiC-C)/SiC composite was studied by a graphical method and stepwise regression method to optimize the estimated parameters, The Kolmogorov-Smirnov test method was used to examine the supposed distribution. The results show that the strength of (SiC-C)/SiC obeys Weibull distribution. The deviation was only 0.19% between the test value and predicated date obtained by function of Weibull distribution, which indicate that the composite possesses perfect strength reliability.