Spectrum Loading and Crack Growth

[+] Author and Article Information
O. E. Wheeler

Convair Aerospace Division, General Dynamics Corp., Fort Worth, Texas

J. Basic Eng 94(1), 181-186 (Mar 01, 1972) (6 pages) doi:10.1115/1.3425362 History: Received May 10, 1971; Online October 27, 2010


An analytical device for improving the accuracy of crack growth predictions in metal subjected to variable amplitude cyclic loading is presented. A modification to the linear cumulative growth idea is proposed which incorporates a consideration of prior load history by taking into account the yield zone ahead of the crack tip. Correlation between analysis and experimental results for six different cases shows that the scheme, even though only a first order improvement on the Miner idea, is sound and can be used with confidence for design and analysis.

Copyright © 1972 by ASME
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