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A test procedure for determining the influence of stress ratio on fatigue crack growthA 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 at given values of K max. This procedure is not to be used, however, for determining the corrosion fatigue crack growth characteristics of alloys when nonsteady-state effects are significant.
Document ID
19740042966
Document Type
Reprint (Version printed in journal)
Authors
Fitzgerald, J. H. (Northrop Corp. Northrop Norair, Hawthorne, Calif., United States)
Wei, R. P. (Lehigh University Bethlehem, Pa., United States)
Date Acquired
August 7, 2013
Publication Date
March 1, 1974
Publication Information
Publication: Journal of Testing and Evaluation
Volume: 2
Subject Category
MATERIALS, METALLIC
Funding Number(s)
CONTRACT_GRANT: NGL-39-007-040
Distribution Limits
Public
Copyright
Other