Abstract
In this paper, the growth behavior of three-dimensional small cracks emanating from a hole under constant-amplitude cyclic loading as well as under constant-amplitude cyclic loading with a single-peak overload cycle has been studied experimentally. The crack growth rates of both cases are correlated to effective stress intensity range ΔK eff = K max − K op , where the crack opening load is calculated by using the crack closure model proposed by Newman. Crack propagation lives are predicted by the above mentioned method. The predictions are in good agreement with test results.
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