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An Interaction Analysis of Two Surface Cracks by the Line Spring Model

선 스프링 모델에 의한 2개 표면균열의 상호간섭 해석

  • 이준성 (육군사관학교 교수부 기계공학과) ;
  • 김영진 (성균관대학교 공대 기계설계학과) ;
  • 양원호 (성균관대학교 공대 기계설계학과) ;
  • 최용식 (성균관대학교 공대 기계공학과)
  • Published : 1990.05.01

Abstract

The fracture mechanics analysis of surface cracks in plates and cylindrical geometries is important in the integrity evaluation of flawed structural components. The objective of this paper is, thus, to numerically investigate an interaction effect of two surface cracks in plate and cylindrical geometries. The effect of crack spacing on the magnitude of the stress intensity factor(K) is investigated using the line-spring model. For the case of a finite plate under uniaxial loading, the effect of crack spacing on the K values is negligible. However, for the case of a cylinder under moderate internal pressure, a significant increase in K values is observed at the deepest point of the surface crack.