PSI - Issue 13

Hikaru Yamaguchi/ Structural Integrity Procedia 00 (2018) 000 – 000

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Hikaru Yamaguchi et al. / Procedia Structural Integrity 13 (2018) 1183–1188

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Fig.10 Change of CTOA with crack length, burst test.

4. Conclusions

Dynamic measurement of drop-weight tear test (DWTT) and pipe burst test were conducted using high-speed camera. As a result, Crack-Tip Opening Angle (CTOA) resistance value measured both by DWTT and pipe burst test was found somewhat different. A care should be taken when using CTOA resistance value measured by DWTT for analyzing dynamic crack propagation behavior in pipelines. Further experiments and analyses must be necessary for establishing factors controlling CTOA resistance value. References [1] R.J. Eiber, T.A. Bubenic and W.A. Maxey, Fracture control technology for natural gas pipelines, Proj. PR-3-9113, NG-18 Rep. No. 208, 1993. [2] P.E. O’Donoghue, S.T. Green, M.F. Kanninen and P.K. Bowles, The development of a fluid/structure interaction model for fl awed fluid containment boundaries with applications to gas transmission and distribution piping, Computers & Structures, vol.38, No. 5/6, pp.501-513, 1991. [3] A. Fonzo, A. Meleddu, G. Demofonti, M. Tavassi and B. Rothwell, Ductile fracture control for high strength steel pipelines, Proc. 6th Int. Pipeline Conf., Sept. 25-29, 2006, Calgary, Alberta, Canada, IPC2006-10331. [4] Z. Zhuang, X.B. Yang, Y.R. Feng, C.Y. Huo and C.J. Zhuang, The study on crack dynamic propagation in the rich gas transmission pipelines, Proc. PVP2006-ICPVT-11, 2006, ASME Pressure Vessels and Piping Division Conf., July 23-27, 2006, Vancouver, B.C, Canada. [5] F. Yaang, C. Huo, J. Luo, H. Li and Y. Li, Crack propagation and arrest simulation of X90 gas pipe, Int. j. Pressure Vessels and Piping, 149 (2017) 120-131. [6] H. Nakai, K. Shibanuma and S. Aihara, Numerical model for unstable ductile crack propagation and arrest in pipelines using finite difference method, Eng. Fract. Mech. 162 (2016) 179-192. [7] K. Miyamoto, H. Nakai, K. Shibanuma and S. Aihara, Development of numerical simulation model for unstable ductile crack propagation in high-pressure gas pipelines based on CTOA, Proc. 25th (2015) Int. Ocean and Polar Engineering Conf., Kona, Big Island, Hawaii, USA, June 21 26, 2015, p.154-161. [8] Ph.P. Darcis, C.N. McCowan, H. Windhoff, J.D. McColsky and T.A. Siewert, Crack tip opening optical measurement methods in five pipeline steels, Eng. Fract. Mech., 75 (2008) 2453-2468. [9] A. Martinelli and S. Venzi, Tearing modulus, J-integral, CTOA and crack profile shape obtained from the load-displacement curve only, Eng. Fract. Mech. Vol. 53, No. 2, pp.263-277, 1996. [10] A. Shtechman, C. McCowan, R. Reuven, P. Darcis, R. Smith, J. Merritt, T. Siewert and J.D. McColoskey, Dynamic apparatus for CTOA measurement in pipeline steels, Proc. 7th Int. Pipeline Conf., Sept. 29 – Oct. 3, 2008, Calgary, Alberta, Canada, IPC2008-64362. [11] D.L. Rudland, G.M. Wilkowski, Z. Feng, Y.-Y. Wang, D. Horsley and A. Glover, Experimental investigation of CTOA in linepipe steels, Eng. Fracture Mech., 70 (2003) 567-577. [12] A. S. Kobayashi, A.F. Emery, W.J. Love, Y.-H. Chao, et al., Ductile crack bifurcation and arrest in pressurized pipe, Fracture Mechanics: Nineteenth Symp. 1988, pp.441-465, ASTM.