Abstract
This paper describes the fatigue behavior of cracks located at two deep “dovetail” notch geometries. Fadgue tests with transparent polymer models produced changes in crack size and shape as a function of elapsed cycles. Numerical stress intensity factor solutions were determined for both through-cracks (using a finite element code), and corner cracks (using a boundary element code) located at the notch bore. The numerical stress intensity factor solutions were verified by predicting fatigue lives, crack sizes and shapes for the experimental results. These predictions showed that the numerically determined stress intensity factors accurately predict fatigue lives, as well as crack size and shape for the dovetail geometries.
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