It is important to determine the bending capacity of linepipes for strain-based design. Several empirical formulas have been proposed in order to evaluate the bending capacity of linepipes, which are presented in terms of the D/t ratio, the internal pressure, the yield ratio and the material strength. FEAs considering these parameters have been performed, however, it has been reported that the results do not always agree with experimental results. It has already been clarified that the geometric imperfections must be considered so that two types of results agree. This paper presents the results of a parametric study examining the effect of geometric imperfections on the bending capacity of linepipes. In addition, the effect of combining two or all of three types of geometric imperfections on the bending capacity was also investigated. When a single imperfection was taken into consideration in the FE models, it was quantitatively clarified that the bending capacity of linepipes improves with a decreasing geometric imperfection. Moreover, when combined geometric imperfections were taken into consideration in the FE models, it was also clarified that the largest imperfection tends to dominate the results and the smallest imperfection does not necessarily affect the bending capacity of the linepipes.
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2008 7th International Pipeline Conference
September 29–October 3, 2008
Calgary, Alberta, Canada
Conference Sponsors:
- International Petroleum Technology Institute and the Pipeline Division
ISBN:
978-0-7918-4859-3
PROCEEDINGS PAPER
Parametric Study on the Effect of Geometric Imperfections on the Bending Capacity of High-Strength Linepipes
Takashi Sato,
Takashi Sato
Osaka University, Suita, Osaka, Japan
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Yoshiki Mikami,
Yoshiki Mikami
Osaka University, Suita, Osaka, Japan
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Masahito Mochizuki,
Masahito Mochizuki
Osaka University, Suita, Osaka, Japan
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Nobuhisa Suzuki,
Nobuhisa Suzuki
Osaka University, Suita, Osaka, Japan
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Masao Toyoda
Masao Toyoda
Osaka University, Suita, Osaka, Japan
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Takashi Sato
Osaka University, Suita, Osaka, Japan
Yoshiki Mikami
Osaka University, Suita, Osaka, Japan
Masahito Mochizuki
Osaka University, Suita, Osaka, Japan
Nobuhisa Suzuki
Osaka University, Suita, Osaka, Japan
Masao Toyoda
Osaka University, Suita, Osaka, Japan
Paper No:
IPC2008-64544, pp. 745-753; 9 pages
Published Online:
June 29, 2009
Citation
Sato, T, Mikami, Y, Mochizuki, M, Suzuki, N, & Toyoda, M. "Parametric Study on the Effect of Geometric Imperfections on the Bending Capacity of High-Strength Linepipes." Proceedings of the 2008 7th International Pipeline Conference. 2008 7th International Pipeline Conference, Volume 3. Calgary, Alberta, Canada. September 29–October 3, 2008. pp. 745-753. ASME. https://doi.org/10.1115/IPC2008-64544
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