| 疲劳裂纹扩展的随机模型 |
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| 引用本文： | 赵华,秦子增.疲劳裂纹扩展的随机模型[J].应用力学学报,1990,7(1):98-102. |
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| 作者姓名： | 赵华 秦子增 |
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| 作者单位： | [1]西安交通大学 [2]国防科技大学 |
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| 摘 要： | 本文从J.L.Bogdanoff提出的一种新的疲劳裂纹扩展模型出发，假定在裂纹扩展过程中存在不同的等概率均匀扩展区间，采用Z变换和其复数反演理论，推导出疲劳裂纹经任意次载荷循环后的失效概率计算的解析公式，计算结果与实验值符合较好、偏保守。
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| 关 键 词： | 疲劳裂纹扩展 等概率均匀扩展区间Markoff链 Z变换 随机模型 |
A STOCHASTIC MODEL OF FATIGUE CRACK GROWTH |
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| Zhao hua.A STOCHASTIC MODEL OF FATIGUE CRACK GROWTH[J].Chinese Journal of Applied Mechanics,1990,7(1):98-102. |
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| Authors: | Zhao hua |
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| Institution: | Zhao hua (xi'an Jiaotong University) Qin Zi-zeng (National University of Defence Technology) |
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| Abstract: | Base on J. L. Bogdanoff model of fatigue crack growth, it is assumed in the paper that during the process of fatigue crack growth, different uniform growth zones of equal probablity exist, By using Z-transform technique and its theory of inversion in complex function, a general analytic formula calculating tile failure probability of fatigue crack after any loading cycles, has been derived. The computed results is well corresponding to the experimental results and keeps safer. |
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| Keywords: | Stochastic model fatigue crack growth Z-transform |
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