한국해양공학회:학술대회논문집 (Proceedings of the Korea Committee for Ocean Resources and Engineering Conference)
- 한국해양공학회 2006년 창립20주년기념 정기학술대회 및 국제워크샵
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- Pages.230-232
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- 2006
부식된 얇은 원통 압력용기의 파손 거동 해석
Analysis of Failure Behavior for Thin Cylinder Pressure Vessel with Corrosion
- Yoon, Ja-Moon (Yokohama National University) ;
- Choi, Moon-Oh (Busan Fire Services) ;
- Ahn, Seok-Hwan (Mechanical Engineering, Pukyong National University) ;
- Nam, Ki-Woo (Materials Science and Engineering, Pukyong National University) ;
- Ando, Katoji (Yokohama National University)
- 발행 : 2006.11.16
초록
Failure behaviors of thin cylinder with corrosion are very important for the integrity of boiler and pressure vessel system. In this study, FEM with internal pressure are conducted on 1000 mm diameter (length 3000 mm and thickness, 5.9 mm) SS400 carbon steel. Failure behaviors of locally wall thinned cylinders were calculated by elasto-plastic analysis using finite element method. The elasto-plastic analysis was performed by FE code ANSYS. We simulated various types of local wall thinning that can be occurred at cylinder surface due to corrosion. Locally wall thinned shapes were machined to be different in size along the circumferential or axial direction of straight cylinder. In case of local wall thinned length 30 mm, internal pressure, when the crack initiation and the plastic collapse occur, didn't decrease dramatically even though local wall thinned depth was deep. In 400 mm, the more local wall thinned depth is deep, the more internal pressure decreased dramatically. In degraded materials, crack is easily initiation but plastic collapse was difficult.
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