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Analysis of Shape Change of a Surface Crack during Stable Fatigue Growth

안정피로성장 중인 표면균열 형상변화의 해석

  • Chu, Seok-Jae (Dept.of Mechanical Engineering, University of Ulsan)
  • 주석재 (울산대학교 기계공학과)
  • Published : 1996.09.01

Abstract

The multi-point procedure is developed to predict the shape change of a semi-elliptical surface crack during stable fatigue crack growth. 3-D stress intensity factors along a crack front are calculated using the simplified 3-D J-intergral. Crack growth rate coefficient in the Paris law is assumed to be constant along the crack growth. Crack growth rate is set to be the distance between the two parallel tangent lines on the two semi-elliptic crack fronts before and after crack growth.

Keywords

Stress Intensity Factor;J-Integral;Finite Element Method;Semi-Elliptical Surface Crack;Aspect Ratio;Multipoint Procedure