Abstract
With von Mises yield criterion, the loading range of Net Section Collapse (NSC) Criteria is extended from combined tension and bending loadings to combined bending, torsion and internal pressure loadings. A new theoretical analyzing method of plastic limit load for pressure pipe with incomplete welding defects based on the extended NSC Criteria is presented and the correlative formulas are deduced, the influences of pipe curvature, circumferential length and depth of incomplete welding defects on the plastic limit load of pressure pipe are considered as well in this method. Meanwhile, according to the orthogonal experimental design method, the plastic limit loads are calculated by the finite element method and compared with the theoretical values. The results show that the expressions of plastic limit load of pressure pipe with incomplete welding defects under bending, torsion and internal pressure based on extended NSC criteria are reliable. The study provides an important theoretical basis for the establishment of safety assessment measure towards pressure pipe with incomplete welding defects.
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References
Ahn, S.H., Nam, K.W., Yoo, Y.S., Ando, K., Ji, S.H., Ishiwata, M., Hasegawa, K., 2002. Fracture behavior of straight pipe and elbow with local wall thinning. Nuclear Engineering and Design, 211(2–3):91–103. [doi:10.1016/S2009-5493(01)00447-2]
Chen, J., Lou, Y.Q., Bao, S.Y., Wen, X.H., 2000. Study on expertise of expert system for safety assessment of in-service pressure pipelines containing defects. Journal of Zhejiang University of Technology, 28(1):1–10 (in Chinese).
Choi, J.B., Goo, B.K., Kim, J.C., Kim, Y.J., Kim, W.S., 2003. Development of limit load solutions for corroded gas pipelines. International Journal of Pressure Vessels and Piping, 80(2):121–128. [doi:10.1016/S0308-0161(03)00005-X]
GB/T 19624-2004. Safety Assessment for In-service Pressure Vessels Containing Defects, Standardization Administration of the People’s Republic of China. General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China. Standards Press of China, Beijing (in Chinese).
Han, S.X., Zhen, X.Y., Jin, Z.J., Xia, F.Y., Wei, X.H., Wan, X.F., 2008. Safety test research of pressure pipes containing incomplete welding defects. Light Industry Machinery, 26(4):103–106 (in Chinese).
Hasegawa, K., Saito, K., Iwamatsu, F., Miyazaki, K., 2009. Prediction of fully plastic collapse stresses for pipe with two circumferential flaws. Journal of Pressure Vessel Technology, 131(2):021209. [doi:10.1115/1.3066967]
Hu, Z.J., Yan, H.J., Xu, H., Li, P.N., 1998. Plastic limit load analysis based on the Net Section Collapse Criteria for circumferentially cracked pipes. Pressure Vessel Technology, 1:1–9 (in Chinese).
Kaninen, M.F., Broek, D., Hahn, G.T., 1978. Toward on elastic fracture mechanics predictive capability for reactor piping. Nuclear Engineering and Design, 48:117–134.
Kim, Y.J., Oh, C.K., Park, C.Y., Hasegawa, K., 2006. Net-section limit load approach for failure strength estimates of pipes with local wall thinning. International Journal of Pressure Vessels and Piping, 83(7):546–555. [doi:10.1016/j.ijpvp.2006.03.001]
Kamaya, M., Suzuki, T., Meshii, T., 2008. Failure pressure of straight pipe with wall thinning under internal pressure. International Journal of Pressure Vessels and Piping, 85(9):628–634. [doi:10.1016/j.ijpvp.2007.11.005]
Rahman, S., 1998. Net-section-collapse analysis of circumferentially cracked cylinders—part II: idealized cracks and closed-form solutions. Engineering Fracture Mechanics, 61(2):213–230. [doi:10.1016/S0013-7944(98)00061-7]
Rahman, S., Wilkowski, G., 1998. Net-section-collapse analysis of circumferentially cracked cylinders—part I: arbitrary-shaped cracks and generalized equations. Engineering Fracture Mechanics, 61(2):191–211. [doi:10.1016/S0013-7944(98)00060-5]
Shim, D., Choi, J., Kim, Y., 2004. Failure strength assessment of pipes with local wall thinning under combined loading based on finite element analysis. Journal of Pressure Vessel Technology, 126(2):179–183. [doi:10.1115/1.1687382]
Smith, A.J., Dwivedy, K.K., 2007. An Improvement in the Code Evaluation of Flawed Pipes. ASME Pressure Vessels and Piping Conference (PVP), San Antonio, Texas, USA, p.23–29. [doi:10.1115/PVP2007-26205]
Zheng, M., Luo, J.H., Zhao, X.W., Zhou, G., Li, H.L., 2004. Modified expression for estimating the limit bending moment of local corroded pipeling. International Journal of Pressure Vessels and Piping, 81(9):725–729. [doi:10.1016/j.ijpvp.2004.05.005]
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Project (No. X106871) supported by the Natural Science Foundation of Zhejiang Province, China
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Jin, Zj., Jiang, Ch., Wan, Xp. et al. Plastic limit load analysis for pressure pipe with incomplete welding defects based on the extended Net Section Collapse Criteria. J. Zhejiang Univ. Sci. A 11, 440–448 (2010). https://doi.org/10.1631/jzus.A0900459
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DOI: https://doi.org/10.1631/jzus.A0900459
Keywords
- Net Section Collapse (NSC) Criteria
- Incomplete welding defects
- Pressure pipe
- Plastic limit load
- Finite element