Abstract
The plasticity-induced crack closure of through-thickness cracks, in CT specimens of 304L austenitic stainless steel, is numerically simulated using finite elements. Crack propagation is achieved through node releasing, by applying constant ΔK amplitude, so as to limit the loading history influence. The calculation of the effective stress intensity factor range, ΔKeff, along different shapes of crack fronts close to real crack fronts, are compared to calculation previously performed for through-thickness straight cracks. The results for the curved crack fronts support that ΔKeff is the driving force of the propagating crack.
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