3D Hi-Nicalon/SiC复合材料室温三点弯曲强度分布

根据3D Hi-Nicalon/SiC复合材料室温三点弯曲强度实验数据,以Weibull分布为假设分布,采用图解法结合逐步回归优选法进行参数估计,探讨了该复合材料的弯曲强度分布。并根据Kolmogorov非参数检验,对假设分布进行了检验。结果表明:该3D Hi-Nicalon/SiC复合材料室温三点弯曲强度可以采用σ_u＝0,Weibull模数m=8. 1545的两参数Weibull分布表征,能够采用求解的Weibull分布很好地预测该3D Hi-Nicalon/SiC复合材料的室温弯曲强度。 

FLEXURAL STRENGTH DISTRIBUTION OF 3D HI-NICALON/SiC IN THREE POINT BENDING TEST AT ROOM TEMPERATURE

The flexural strength of a 3D Hi-Nicalon/SiC composite was tested using the three point bending method at room temperature and the strength distribution was studied based on Weibull distribution. A graphical method and the stepwise regression were applied to optimizing the estimated parameters. Furthermore, the validity of the assumed distribution was examined by the Kolmogorov test. The results indicate that the statistical distribution of 3D Hi-Nicalon/SiC is in agreement with a two-parameter Weibull distribution characterized by σu＝0 and the Weibull modulus, m=8. 1545. The strength distribution of the 3D Hi-Nicalon/SiC composite in the three point bending test can be accurately predicted using the gained two-parameter Weibull distribution.