Constraint Effects on the Prediction of Fatigue Life of Surface Flaws

[+] Author and Article Information
M. Jolles

Fracture Mechanics Section, Material Science and Technology Division, Naval Research Laboratory, Washington, D.C. 20375

J. Eng. Mater. Technol 105(3), 215-218 (Jul 01, 1983) (4 pages) doi:10.1115/1.3225646 History: Received July 30, 1982; Online September 23, 2009


The effects of the variation of stress field triaxiality on the prediction of the fatigue growth of semielliptic surface flaws are investigated. The concepts of crack closure are used in a fatigue growth analysis to account for constraint variation. The analysis, together with a traditional fatigue crack growth analysis which does not account for constraint variation, is used to predict flaw growth observed in experiments. Significant improvements in predicted fatigue life, as well as predicted crack shape, are obtained by accounting for the variation in constraint.

Copyright © 1983 by ASME
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