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Effect of Local Wall Thinned Location due to Erosion-Corrosion on Fracture Behavior of Pipes  

Ahn, Seok-Hwan (School of Mechanical Engineering, Pukyong National University)
Seok, Kum-Cheol (Department of UR Interdisciplinary Program of Mechanical Engineering Graduate School, Pukyong National University)
Nam, Ki-Woo (Division of Materials Science and Engineering, Pukyong National University)
Publication Information
Journal of Ocean Engineering and Technology / v.21, no.1, 2007 , pp. 51-58 More about this Journal
Abstract
This study on the effects of local wall-thinned location on the fracture behavior of pipes was carried out, and the results were compared with the analytical results. Local wall-thinning for the bending test was machined with various sizes on the outside of pipes, in order to simulate the metal loss, due to erosion/corrosion. In addition, we had carried out FE analysis for the pipes with local wall thinning on the inside, and its results were comparatively studied with that of the outside. Three-dimensional elasto-plastic analyses were able to accurately simulate fracture behaviors of inner or outer wall thinning. Fracture types, obtained from the experiments and analyses, could be classified into ovalization, local buckling and crack initiation, depending on the thinned length and thinned ratio. Based on the results, the fracture behaviors of pipes with the outer wall thinning can be applied to estimate the fracture behaviors of pipes with the inner wall thinning.
Keywords
Fracture behavior; Erosion/Corrosion; Finite element analysis; Pipe; Inner wall thinning; Outer wall thinning; Local wall thinned location;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 안석환, 남기우, 김선진, 김진환, 김현수, 도재윤 (2003). '감육배관의 굽힘하중에 의한 손상모드와 파괴거동 평가' 대한기계학회논문집, 제27권, 제1호, pp 8-17
2 Ahn, S. H., Naill, K. W., Yoo, Y. S., Ando, K., Ji, S. H., Ishiwata, M. and Hasegawa, K. (2002). 'Fracture Behavior of Straight Pipe and Elbow with Local Wall Thinning', Nuclear Engineering and Design 211, pp 91-103   DOI   ScienceOn
3 ASME Boiler and Pressure Vessel Code Section III. (1992)
4 Deardorff, A. F. and Bush, S. H. (1990). 'Development of ASME Section Criteria for Erosion-Corrosion Thinning of Carbon Steel Piping', ASME PVP, , NDE-Vol 7, pp 71-75
5 Miyazaki, K., Nebu, A., Kanno, S., Ishiwata, M. and Hasegawa, K. (2002). 'Study on Fracture Criterion for cabon steel pipes with Local Wall Thinning', J. of High pressure Institute of Japan, Vol 40, No 2, pp 62-72
6 김진원, 박치용 (2005). '직관 배관의 국부 감육결함에 대한 건전성 평가 모델' 대한기계학회논문집, 제29권, 제5호, pp 734-742
7 Ramberg, W. and Osgood, W.R. (1943). 'Description of Stress-Strain Curves by Three', NACA Technical Note, No 902
8 Ahn, S. H., Ando, K., Ishiwata, M. and Hasegawa, K. (1998). 'Plastic Collapse behavior of Pipes with Local Wall Thinning Subjected to Bending Load Allowable limit' , JHPI, Vol 36, No 4, pp 225-234
9 ASME Boiler and Pressure Vessel Code Section XI. (1998)
10 안석환, 남기우 (2005). '굽힘하중을 받는 배관의 파손에 미치는 감육의 영향' 대한기계학회논문집 A권, 제29권, 제4호, pp 606-613
11 Mathonet, J. F., Cherasse, J. M., Leblois, C. L. and Guyette, M. A. (1995). 'Belgian Methodology for Evaluation of Frosion Corrosion Phenomena in Unit 1; 2; 3 & 4 of the DOEL Nuclear Power Plant(NPP)', ASME PVP, PVP-Vol-303, pp 393-399
12 Miyazaki, K., Kanno, S., Ishiwata, M., Hasegawa, K, Ahn, S. H. and Ando, K. (1999). 'Fracture behavior of Carbon Steel Pipe with Local Wall Thinning Subjected to Bending Load', Nuclear Engineering and Design 191, pp 195-204   DOI   ScienceOn
13 Virginia Electric and Power Co. (1987). 'Surry Unit 2 Reactor Trip and Feedwater Pipe Failure Report'
14 Weiss, V. (1972). Proceeding 1st Int. Conf. on Mechanical Behavior of Materials, pp 159
15 안석환, 이수식, 김진욱, 윤자문, 남기우 (2005). '감육배관의 유한요소해석에 의한 변형 및 강도 평가' 한국해양공학회지, 제19권, 제5호, pp 65-70   과학기술학회마을
16 CNN. com (2004). 'Japan to probe nuclear accident'