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입계기공의 확산성장 모델을 이용한 고온 기기의 크립균열전파 해석 (2)

  • 전재영 (삼성항공(주) 항공우주연구소)
  • Published : 1996.04.01

Abstract

The analytic solution of the stress field at creep crack in the presence of grain boundary caviation is to be obtained by solving the governing equation which was derived through the previous paper. The complex integral technique is used to slove the singular integral equation. under the help of the information about stress behaviors at the ends of integral region know by numerical solution. The resultant stress disstribution obtained shows the relaxed crack-tip singularity of $r^{1/2+\theta}$ due to the intervention of cavitation effect, otherwise, it should assumed to be $r^{1/2}$ singularity of linear elastic fracture mechanics with no cavitation.

Keywords

Singular Integral Equation;Stress Field;Grain Boundary Cavity;Complex Integral