STATISTICAL NATURE OF FATIGUE CRACK PROPAGATION.

被引：0
|
作者：
Virkler, D.A.
Hillberry, B.M.
Goel, P.K.
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来源：
| 1978年
关键词：
AIRCRAFT MATERIALS - Fatigue;
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摘要：
A statistical investigation of the fatigue crack propagation process was conducted. Sixty-eight replicate constant amplitude crack propagation tests were conducted on 2034-T3 aluminum alloy. Distribution determination programs were written for the variables DELTA N/ DELTA a, N, da/dN, and dN/da. The following distributions were considered: two-parameter normal distribution, three-parameter log-normal distribution, three-parameter Weibull distribution, two-parameter gamma distribution, three-parameter gamma distribution, the generalized three-parameter gamma distribution, and the generalized four-parameter gamma distribution. From the experimental data, the distribution of N as a function of crack length was best represented by the three-parameter log-normal distribution.
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