응집영역모델을 이용한 다공질 재료의 파괴 거동 연구

다국어 초록 (Multilingual Abstract)

The effect of porosity on the crack propagation is studied by using the cohesive zone model. Standard mode Ⅰ fracture test were done by using compact tension specimens with various porosities. Load-load line displacement curves and δ5-crack resistance curves for various porosities were obtained from experiments. The cohesive zone model proposed by Xu and Needleman was employed to describe the crack propagation in porous media, and the Gurson model is used for constitutive relation of porous materials. These models were implemented into user subroutines of a finite element program ABAQUS. The fracture mode changes from ductile fracture to brittle fracture as the porosity increases. Numerical calculations agree well with experimental results.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 이론적 배경
• 3. 실험
• 4. 유한요소해석
• 5. 결과 및 고찰
• 6. 결론
• 참고문헌

참고문헌 (Reference)

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