To investigate the mechanical properties of pipeline subjected to plastic deformation, tensile tests and crack-tip-opening displacement (CTOD) tests were conducted on X60, X65, and X80 line pipe steels with uniaxial tensile or compressive prestrain, . The tensile tests revealed that the Bauschinger effect and work hardening were dependent on the yield-to-tensile ratio of the steels; the change in yield stress due to prestrain linearly depended on the of the base metal. A critical CTOD for crack initiation decreased with increasing . Compressive prestrain had a larger effect on the reduction of the critical CTOD than tensile prestrain. The test results showed that the reduction in the critical CTOD due to tensile prestrain was predictable with a simplified theoretical model employing a critical fracture strain of the base metal.
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e-mail: nhagi@tokyo-gas.co.jp
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August 2005
Technical Papers
Effect of Prestrain on Tensile and Fracture Toughness Properties of Line Pipes
Naoki Fukuda,
Naoki Fukuda
Pipeline Technology Center,
Tokyo Gas Co.
, Ltd., 1-7-7, Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan Tel: 81-45-505-7309 Fax: 81-45-521-1451
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Naoto Hagiwara,
Naoto Hagiwara
Pipeline Technology Center,
e-mail: nhagi@tokyo-gas.co.jp
Tokyo Gas Co.
, Ltd., 1-7-7, Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan Tel: 81-45-505-7309 Fax: 81-45-521-1451
Search for other works by this author on:
Tomoki Masuda
Tomoki Masuda
Pipeline Technology Center,
Tokyo Gas Co.
, Ltd., 1-7-7, Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan Tel: 81-45-505-7309 Fax: 81-45-521-1451
Search for other works by this author on:
Naoki Fukuda
Pipeline Technology Center,
Tokyo Gas Co.
, Ltd., 1-7-7, Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan Tel: 81-45-505-7309 Fax: 81-45-521-1451
Naoto Hagiwara
Pipeline Technology Center,
Tokyo Gas Co.
, Ltd., 1-7-7, Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan Tel: 81-45-505-7309 Fax: 81-45-521-1451e-mail: nhagi@tokyo-gas.co.jp
Tomoki Masuda
Pipeline Technology Center,
Tokyo Gas Co.
, Ltd., 1-7-7, Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan Tel: 81-45-505-7309 Fax: 81-45-521-1451J. Offshore Mech. Arct. Eng. Aug 2005, 127(3): 263-268 (6 pages)
Published Online: January 30, 2005
Article history
Received:
February 12, 2004
Revised:
January 30, 2005
Citation
Fukuda, N., Hagiwara, N., and Masuda, T. (January 30, 2005). "Effect of Prestrain on Tensile and Fracture Toughness Properties of Line Pipes." ASME. J. Offshore Mech. Arct. Eng. August 2005; 127(3): 263–268. https://doi.org/10.1115/1.1894405
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