Novel statistical analysis method for determining shear strength of C/C composite pin
Novel statistical analysis method for determining shear strength of C/C composite pin
复制标题
确定 C/C 复合销剪切强度的统计分析新方法
DOI：
10.1016/j.ceramint.2019.10.275
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发表时间：
2020-03
影响因子：
5.2
通讯作者：
Jingwei Yu
中科院分区：
文献类型：
--
作者：
Fei Guo;Qingguo Fei;Yanbin Li;Peiwei Zhang;Meng Wang;Jingwei Yu
强度的离散性严重制约了C/C复合材料的广泛应用。用统计分析方法研究了C/C复合材料的强度。本文提出了一种新的统计分析方法--B-分布来检验C/C复合材料销钉的剪切强度。该方法是使用贝叶斯推理方案与马尔可夫链蒙特卡罗采样器。然后，利用B分布和四种传统的统计模型（三参数Weibull、二参数Weibull、对数正态和Gamma）计算了C/C复合材料在不同方向上的剪切强度分布。这些是严格分析的Kolmogorov-Smirnov（K-S）检验和最大似然检验。其次，统计分析了加载方向对C/C复合材料钉剪切强度的影响。结果表明，B分布是最适合实验数据的统计分布。另外，C/C复合材料销钉在30°和45°方向的高可靠性剪切强度相对较高，而在75°和90°方向的高可靠性剪切强度相对较低。
The discreteness of strength seriously restricts the wider use of Carbon/Carbon (C/C) composites. The strength of C/C composites is studied by using statistical analysis methods. Here, a novel statistical analysis method named B-distribution is proposed to examine the shear strength of C/C composite pins. The method is implemented using a Bayesian inference scheme with a Markov Chain Monte Carlo sampler. Then, the shear-strength distributions of the C/C composites in different directions are calculated by the B-distribution and four traditional statistical models (three-parameter Weibull, two-parameter Weibull, log-normal, and gamma). These are critically analysed by a Kolmogorov-Smirnov (K–S) test and a maximum likelihood test. Next, the effect of the loading direction on the shear strength of C/C composite pin is statistically analysed. The results show that the B-distribution is the most appropriate statistical distribution for the experimental data. Additionally, it is found that the high reliability shear strengths of C/C composite pin in the 30° and 45° directions are relatively higher, and the high reliability shear strengths of C/C composite pin are relatively lower in the 75° and 90° directions.
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影响因子：
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作者：
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通讯作者：
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