Statistical Evaluation of Fatigue Lives at and Near Fatigue Limit for Notched Specimens of Steel and Their Life Distributions

摘要

The initiation and the propagation of the fatigue cracks as well as the shape of distribution of cracks near the fatigue limit are studied for a CR-MO steel. Fatigue cracks are observed using an electronmagnescope. The relations between the distribution of fatigue lives and the propagation and distribution of fatigue cracks are investigated. A statistical distribution function lives at and near the fatigue limit is proposed.