Crack growth rate model under constant cyclic loading and effect of different singularity fields

摘要

The effect of two singularity fields: the Hutchinson-Rice-Rosengren (HRR) fields and the Rice-Kujawski-Ellyin (RKE) fields, is investigated in the present study to discuss a former fatigue crack growth (FCG) model based on energy balance during growth of the crack. A parameter which can demonstrates the effect of different types of singularity fields is included in the crack propagation model which can predict stage-Ⅱ FCG behavior independently from the basic low cycle fatigue properties. Good agreement between experimental and theoretical results is obtained.