The objective of this study was to better understand and predict fatigue crack initiation and growth from stress concentrations subjected to complex service loading histories. A wide variety of deformation and fatigue tests were performed using tubular and plate specimens made from 2024-T3 aluminum alloy, with and without the inclusion of a circular through-thickness hole. It is shown that equivalent stress- and strain-based analysis approaches lack a general robustness and offer little room for improvement. More advanced analysis techniques, however, provide an opportunity to more accurately account for various aspects of the fatigue failure process under both constant and variable amplitude loading conditions.
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