摘要
运用统计学方法,对2D C/SiC复合材料高温拉伸蠕变寿命的分布规律进行研究。通过线性回归分析得到适合表征材料高温拉伸蠕变寿命的正态、对数正态和两参数Weibull三种分布模型的拟合参数;结合失效概率和拟合优度检验,利用信息理论,对三种分布模型进行综合评价,认为三种分布中两参数Weibull分布最适合描述2D C/SiC高温拉伸蠕变寿命的分布规律。
The tensile creep life distribution of 2D C/SiC composites at high temperature was investigated by the methods of statistics. The three kinds of distribution models of normal, lognormal and two-parameter Weibull that suitable for characterizing the tensile creep life distribution of material at high temperature were obtained from linear regression analysis. The comprehensive evaluation to three kinds of distribution models was conducted by information theory combined with failure probability and goodness of fit test. , and the result showed that two-parameter Weibull distribution was the most appropriate to describe the tensile creep life distribution for 2D C/SiC at high temperature.
出处
《机械强度》
CAS
CSCD
北大核心
2013年第6期823-828,共6页
Journal of Mechanical Strength
基金
国家自然科学基金资助项目(11072195)~~
关键词
2D
C
SIC复合材料
蠕变寿命
寿命分布模型
综合评价
2D C/SiC composites materials
Creep life
Life distribution model
Comprehensive evaluation
