Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7172320 | International Journal of Fatigue | 2014 | 11 Pages |
Abstract
This paper presents the results of small- and large-crack-growth-rate tests conducted on the 7075-T651 alloy over a wide range of constant-amplitude loading to establish the baseline crack-growth-rate curves for the fatigue analyses. Crack-growth behavior was found to be different in the thickness and in-plane directions. These test data are compared with results from a NASA/CAE Cooperative Program on small- and large-crack growth in a 7075-T6 thin-sheet alloy. Using inclusion-particle-cluster sizes and shapes, like those that are observed in tests, the fatigue and crack-growth lives are predicted on various specimens used to simulate details in a wing panel under either constant-amplitude or simulated wing spectrum loading. The predicted results compared well with the test data.
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Authors
J.C. Jr., E.L. Anagnostou, D. Rusk,