Computational Structural Engineering (전산구조공학)

Computational Structural Engineering Institute of Korea (한국전산구조공학회)
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Boundary Element Analysis of Stress Intensity Factor for Interface Edge Crack in A Unidirectional Composite

단일방향 복합재료의 공유면에 존재하는 모서리 균열의 경계요소해석

  • 이상순 (한국원자력연구소 원자로기계분야) ;
  • 김정규 (한국원자력연구소 원자로기계분야)
  • Published : 1996.03.01
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Abstract

The overall stress intensity factor for edge crack located at the interface between fiber and matrix of a unidirectional graphite/epoxy laminate model subjected to a transverse tensile strain have been computed using the boundary element method. Such crack might be generated due to a stress singularity in the vicinity of the free surface. The amplitude of complex stress intensity factor has the constant value at large crack lengths.

이 논문에서는 경계요소법을 사용하여 횡방향의 인장변형률을 받는 단일방향 graphite/epoxy 복합재료의 섬유와 기지의 공유면에 존재하는 모서리 균열에 대한 응력확대계수를 계산하였다. 그러한 균열은 복합재료의 자유경계면에서 발생하는 특이 응력들에 의해 야기될 수 있다. 응력확대계수의 크기는 균열길이가 작은 경우에는 균열길이에 따라 조금씩 증가되다가, 균열길이가 커지면 일정한 값에 이르게 된다.

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References

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