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A Study on the Crack Propagation Criterion of Orthotropic Material by the Static Photoelastic Experimental Hybrid Method

정적 광탄성 실험 하이브리드법에 의한 직교이방성체의 균열전파 기준에 관한 연구

  • 신동철 (영남대학교 기계공학부) ;
  • 황재석 (영남대학교 기계공학부) ;
  • 남성수 (영남대학교 대학원 기계공학부) ;
  • 권오성 (영남대학교 대학원 기계공학부)
  • Published : 2004.11.01

Abstract

The static photoelastic experiment was applied to orthotropic materials. And then the specimens used in photoelastic experiment were fractured under static load. The static photoelastic experimental hybrid method for orthotropic material was introduced and its validity had been assured. Crack propagation criterion used the stress components, which are considered the higher order terms, obtained from the static photoelastic experimental hybrid method was introduced and it was applied to the minimum strain energy density criterion, the maximum tangential stress criterion and mode mixity. Comparing the actual initial angle of crack propagation with the theoretical initial angle of crack propagation obtained from the above failure criterions, the validities of the above two criterions are assured and the optimal distance (${\gamma}$) from the crack-tip is 0.01mm in order to get the initial angle of crack propagation of orthotropic material(C.F.E.C.).

Keywords

Crack Propagation Criterion;Static Photoelastic Experimental Hybrid Method;Minimum Strain Energy Density Criterion;Maximum Tangential Stress Criterion;Orthotropic Material;Mode Mixity

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