Nonlinear Fatigue Damage Accumulation Under Random Loading

[+] Author and Article Information
W. Q. Zhu, M. X. Jiang

Department of Mechanics, Zhejiang University, Hangzhou 310027, People’s Republic of China

J. Pressure Vessel Technol 118(2), 168-173 (May 01, 1996) (6 pages) doi:10.1115/1.2842176 History: Received December 05, 1994; Revised November 20, 1995; Online February 11, 2008


The analytical expressions for the probability densities of the cumulative fatigue damage and fatigue life and for the reliability function are obtained for a mechanical or structural component subject to stationary random stress process on the basis of a stochastic theory of fatigue damage accumulation proposed by the first author and his co-worker and the Morrow’s nonlinear damage rule. The comparison between the results from Morrow’s and Palmgren-Miner’s damage rules for the case when the stress is a narrow-band stationary Gaussian process with zero mean is made and some important conclusions are drawn.

Copyright © 1996 by The American Society of Mechanical Engineers
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