한국해양공학회:학술대회논문집 (Proceedings of the Korea Committee for Ocean Resources and Engineering Conference)

한국해양공학회 (Korean Society of Ocean Engineers)
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유한요소법을 이용한 피로하중을 받는 균열선단의 소성영역크기에 대한 연구

A Study on Plastic Zone at the Crack Tip under Cyclic Loading by FEM

  • Kim, Kyung-Su (Dept. of Naval Architecture & Ocean Engineering, Inha University) ;
  • Shim, Chun-Sik (Dept. of Naval Architecture & Ocean Engineering, Inha University) ;
  • Lee, Wook-Jae (Dept. of Naval Architecture & Ocean Engineering, Inha University) ;
  • Cho, Hyung-Min (Dept. of Naval Architecture & Ocean Engineering, Inha University)
  • 발행 : 2002.05.17
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초록

In this paper, the effect of the crack growth length on the plastic zone size at the crack tip and the crack growth lives of the DENT specimen under constant amplitude cyclic loading were studied. The plastic zone size was calculated by nonlinear static method in commercial finite element analysis program, MSC/NASTRAN and the crack growth lives were also calculated by using compliance function considering geometric shape in MSC/FATIGUE. The calculated plastic zone size increased proportional to the crack length. And comparison of calculated plastic zone size and crack growth lives with the experimental results shows a good agreement.

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