13권 6호 63-69 2005 [한국자동차공학회 논문집 ]
| 제목 | 분포 크랙들 사이에서의 상호 간섭에 대한 연구 |
|---|---|
| 분야 | 차체 및 구조 안전 |
| 언어 | Korean |
| 저자 | 한문식(계명대학교), 조재웅(공주대학교) |
| Key Words | Normalized stress intensity factor(등응력확대계수), Plastic zone(소성영역), Center crack (중앙크랙), Small crack(작은 크랙), Crack tip(크랙선단), Distributed cracks(분포크랙들) |
| 초록 | For the case that center crack is surrounded by four small cracks which are symmetrically distributed around center crack, the same values of normalized stress intensity factor of center crack according to the position of the tip of small cracks are located on the smooth curve. And the stress intensity factor according to any position of small cracks can be sufficiently obtained from this curve. The plastic zones between distributed cracks are also investigated by changing the positions of nearly small cracks. The occurrence of plastic zone due to the interaction between center crack and small cracks are analyzed by finite element method. The mechanical behavior at the vicinity of crack tips is investigated by plastic areas. The changes of plastic zones according to positions of distributed cracks are drawn schematically. The safety of materials is also analyzed. |
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