Collapse Mechanisms of Composite Pipelines under External Pressure

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Author(s)
Wei, Z
Karampour, H
Guan, H
Rasheed, H
Lin, H
Griffith University Author(s)
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Date
2022
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Shanghai, China

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Abstract

This study investigates the effect of wrapping carbon fiber reinforced polymer (CFRP) over conventional steel offshore pipelines on improving their capacity under external hydrostatic pressure. Buckling performance of bare steel pipelines (conventional) and composite pipes (CFRP-strengthened) subjected to external pressure are examined analytically and numerically. In composite pipelines, the cylindrical steel tubes are wrapped with CFRP in 0/90° and ±45° fiber orientations. The finite element analysis (FEA) results are validated against analytical solutions on buckling of bare and composite pipelines. A parametric study is also carried out to investigate the effect of D/t ratio, the ratio of the thickness of the FRP to the steel-wall thickness, and the fiber orientation on the buckling capacity of composite pipelines. A good agreement between the current FEA and theoretical results are observed for pipelines with D/t > 30. Results also show that wrapping 0/90° cross-ply CFRP on the conventional steel pipes is more efficient in bucking resistance than the ±45° one. Using 0/90° orientation wrapping, the collapse pressure of a thin pipelines (D/t=100) can be enhanced by a factor of 15.

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Proceedings of the Thirty-second (2022) International Ocean and Polar Engineering Conference

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2

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© 2022 ISOPE. The attached file is reproduced here in accordance with the copyright policy of the publisher. Please refer to the conference's website for access to the definitive, published version.

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Ocean engineering

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Wei, Z; Karampour, H; Guan, H; Rasheed, H; Lin, H, Collapse Mechanisms of Composite Pipelines under External Pressure, Proceedings of the International Offshore and Polar Engineering Conference, 2022, 2, pp. 1590-1597