✦ LIBER ✦

On fatigue crack growth under random loading

✍ Scribed by W.Q. Zhu; Y.K. Lin; Y. Lei

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 822 KB
Volume: 43
Category: Article
ISSN: 0013-7944
DOI: 10.1016/0013-7944(92)90307-z

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✦ Synopsis

A probabilistic analysis of the fatigue crack growth, fatigue life and reliability of a structural or mechanical component is presented on the basis of fracture mechanics and theory of random processes. The material resistance to fatigue crack growth and the time-history of the stress are assumed to be random. Analytical expressions are obtained for the special case in which the random stress is a stationary narrow-band Gaussian random process, and a randomized Paris-Erdogan law is applicable. As an example, the analytical method is applied to a plate with a central crack, and the results are compared with those obtained from digital Monte Carlo simulations.

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