| 随机因素对疲劳裂纹扩展分散性影响的探讨 |
| |
| 引用本文： | 薛红军,吕国志.随机因素对疲劳裂纹扩展分散性影响的探讨[J].机械强度,2001,23(1):35-37,84. |
| |
| 作者姓名： | 薛红军 吕国志 |
| |
| 作者单位： | 西北工业大学飞机工程系, |
| |
| 摘 要： | 采用概率有限元和可靠性分析相结合的方法，将影响裂纹扩展的主要随机因素作为随机变量处理，研究裂纹扩展失效概率的计算问题。文中采用梯度投影方法，对各种主要随机因素作为随机变量时用于失效概率计算的可靠性指标进行了计算，在此基础上用一阶可靠性方法计算了疲劳裂纹扩展的失效概率。
|
| 关 键 词： | 疲劳裂纹扩展 随机性 可靠性 失效概率 分散性 |
INFLUENCE OF THE RANDOMNESS ON SCATTER OF THE FATIGUE CRACK GROWTH |
| |
| XUE Hongjun,LU Guozhi.INFLUENCE OF THE RANDOMNESS ON SCATTER OF THE FATIGUE CRACK GROWTH[J].Journal of Mechanical Strength,2001,23(1):35-37,84. |
| |
| Authors: | XUE Hongjun LU Guozhi |
| |
| Abstract: | Treating many factors which mainly affect the fatigue crack growth as random variable, the probabilistic finite element method and reliability analysis are combined to study the failure probability for fatigue crack growth. The gradient projection algorithm is used to calculate the reliability index that is used to calculate the probability of fatigue failure. Based on this result the failure probability for fatigue crack growth is obtained by the First Order reliability method. |
| |
| Keywords: | Fatigue crack growth Randomness Reliability Failure probability |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
