Abstract

The specimen materials used in this research are isotropic epoxy resins. The static photoelastic experiment was applied to them. And then the specimens used in photoelastic experiment were fractured under static load. The static photoelastic experimental hybrid method 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 (r) from the crack-tip is 0.01mm in order to get the initial angle of crack propagation of isotropic epoxy resin.

Keywords

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

• 등방성체;
• 정적 광탄성 실험 하이브리드 법;
• 균열전파 이론;
• 최소 변형률 에너지 밀도 이론;
• 최대 접선응력 이론;
• 모드 혼합도;

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References

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