Residual Stress Fields and Fatigue Crack Growth Retardation Induced by Ring-Indentation

균열선단에 링압인 부가에 의한 잔류응력장분포와 피로균열성장지연

A method for the retardation of fatigue crack growth using ring indentation at the vicinity of a crack is examined. Residual stresses near crack tip are evaluated using fracture mechanics approach. The motivation is to develop a simple and effective method for obtaining an increase in fatigue lives to total failure of materials with crack. Fatigue testing of aluminum specimen showed that the retardation effects are observed after the application of the method.