The Statistical Nature of Fatigue Crack Propagation
- 1 April 1979
- journal article
- Published by ASME International in Journal of Engineering Materials and Technology
- Vol. 101 (2) , 148-153
- https://doi.org/10.1115/1.3443666
Abstract
A statistical investigation of the fatigue crack propagation process was conducted. Sixty-eight replicate constant amplitude crack propagation tests were conducted on 2024-T3 aluminum alloy. From the experimental data, the distribution of N was found to be represented best by the 3-parameter log-normal distribution. Six growth rate calculation methods were investigated and a modified secant method was found to introduce the least amount of error into the growth rate data. No one single distribution was found to describe the distribution of da/dN. A prediction scheme using the distribution parameters of da/dN was partially successful.Keywords
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