混杂纤维增韧SiC基复合材料的强度分布  

Strength distribution of hybrid fibers reinforced SiC matrix composite

作　　者：刘善华[1] 张立同[1] 刘永胜[1] 殷小玮[1] 成来飞[1] 李辉[1] 孟志新[1] 

机构地区：[1]西北工业大学超高温结构复合材料重点实验室,西安710072

出　　处：《固体火箭技术》2012年第3期410-413,共4页Journal of Solid Rocket Technology

基　　金：国家自然基金项目(50972119;50902112)

摘　　要：以采用化学气相渗透法(CVI)制备的SiC纤维和C纤维混杂增韧SiC基复合材料((SiC-C)/SiC)的弯曲强度数据为依据,以Weibull分布为假设,采用图解法结合逐步回归优选法进行参数估计,并采用Kolmogorov-Smirnov法对(SiC-C)/SiC复合材料的强度分布进行假设检验。结果表明,(SiC-C)/SiC复合材料的强度统计服从Weibull分布。依据获得Weibull分布函数预测(SiC-C)/SiC的强度值与实验值偏差仅为0.19%,复合材料强度可靠性较好。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.

关 键 词：(SiC-C)/SiC复合材料 弯曲强度 WEIBULL分布 Kolmogorov检验 

分 类 号：V258[一般工业技术—材料科学与工程]