State of the ART Report on Fatigue Life Evaluation of Notched Components and Welded Joints

摘要

The evaluation of the stress intensity factor (KI) of a semieliptical surface crack initiated at a notch is discussed. The state-of-the-art of fatigue life estimates of notched components, and information on semielliptical surface cracks are reviewed. Crack shape development, KI solutions, and fatigue life prediction for smooth specimens using the conventional crack propagation data obtained from through cracks are considered. A KI solution for semielliptical surface cracks in a smooth plate obtained by three-dimensional finite elements analyses for selected crack shapes and depths is presented.