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Prediction of Growth Behavior of Initially Semicircular Surface Cracks under Axial Loading

축하중을 받는 초기 반원 표면피로균열의 진전거동 예측

  • Published : 1992.08.01

Abstract

A relatively simple prediction method is proposed for initially semicircular surface crack growth under axial loading. The method takes into account the difference in surface crack closure behavior at the depth point and at the surface intersection point, and also the relationship of crack closure for surface crack and through-thickness crack. The prediction method provides conservative estimation for fatigue life within factor of two, and the predicted crack geometry variations agree well with the observed results. As a result, the prediction method proposed here is considered to be useful for engineering application.