Journal Published Online: 01 March 1974
Volume 2, Issue 2

A Test Procedure for Determining the Influence of Stress Ratio on Fatigue Crack Growth



A test procedure is outlined by which the rate of fatigue crack growth over a range of stress ratios and stress intensities can be determined expeditiously using a small number of specimens. This procedure was developed to avoid or circumvent the effects of load interactions on fatigue crack growth, and was used to develop data on a mill annealed Ti-6Al-4V alloy plate. Experimental data suggest that the rates of fatigue crack growth among the various stress ratios may be correlated in terms of an effective stress intensity range, Δ Keff, at given values of Kmax.

This procedure is not to be used, however, for determining the corrosion fatigue crack growth characteristics of alloys when non-steady-state effects are significant.

Author Information

FitzGerald, JH
Northrop Corp., Hawthorne, Calif.
Wei, RP
Lehigh University, Bethlehem, Pa.
Pages: 4
Price: $25.00
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Stock #: JTE10076J
ISSN: 0090-3973
DOI: 10.1520/JTE10076J