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RESEARCH PAPERS

Fatigue Crack Growth in Mixed Mode Loading

[+] Author and Article Information
Wei-Ren Chen, L. M. Keer

Department of Mechanical Engineering, The Technological Institute, Northwestern University, Evanston, Ill. 60208

J. Eng. Mater. Technol 113(2), 222-227 (Apr 01, 1991) (6 pages) doi:10.1115/1.2903396 History: Revised October 01, 1989; Revised May 01, 1990; Online April 29, 2008

Abstract

In this paper, a direct approach based on the mixed mode Dugdale model, the accumulated plastic displacement criterion for crack propagation and the cyclic J-integral concept is used to develop equations to predict the mixed mode fatigue crack growth. A fourth-power stress intensity factor crack growth equation and a second-power cyclic J-integral equation are developed under conditions of mixed mode loading and small-scale yielding. By comparing the present analysis with the experimental results, the proposed fatigue crack growth rate equations lead to results that appear to yield reasonable magnitudes for various loading conditions.

Copyright © 1991 by The American Society of Mechanical Engineers
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