The present paper addresses aspects related to local buckling and instability of tensile armors in flexible pipes. Analytical models for evaluating the tensile armor buckling capacity in both transverse (radial and lateral) directions are presented based on formulating the linearized differential equation describing transverse stability of the thin curved wire assuming no friction. Then analytical models for the ultimate capacity of the outer sheath and antibuckling tape are formulated and a combined criterion for radial instability is proposed based on considering radial buckling of the tensile armor, wire yield failure, and the ultimate capacity of the outer sheath and tape. Thereafter, a study is performed comparing the proposed models with test data and alternative models available in the literature.
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August 2017
Research-Article
An Analytical Treatment of Buckling and Instability of Tensile Armors in Flexible Pipes
Svein Sævik,
Svein Sævik
Professor
Department of Marine Technology,
Norwegian University of
Science and Technology,
Trondheim 7491, Norway
e-mail: svein.savik@ntnu.no
Department of Marine Technology,
Norwegian University of
Science and Technology,
Trondheim 7491, Norway
e-mail: svein.savik@ntnu.no
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Mats J. Thorsen
Mats J. Thorsen
Department of Marine Technology,
Norwegian University of
Science and Technology,
Trondheim 7491, Norway
e-mail: mats.j.thorsen@ntnu.no
Norwegian University of
Science and Technology,
Trondheim 7491, Norway
e-mail: mats.j.thorsen@ntnu.no
Search for other works by this author on:
Svein Sævik
Professor
Department of Marine Technology,
Norwegian University of
Science and Technology,
Trondheim 7491, Norway
e-mail: svein.savik@ntnu.no
Department of Marine Technology,
Norwegian University of
Science and Technology,
Trondheim 7491, Norway
e-mail: svein.savik@ntnu.no
Mats J. Thorsen
Department of Marine Technology,
Norwegian University of
Science and Technology,
Trondheim 7491, Norway
e-mail: mats.j.thorsen@ntnu.no
Norwegian University of
Science and Technology,
Trondheim 7491, Norway
e-mail: mats.j.thorsen@ntnu.no
1Corresponding author.
Contributed by the Ocean, Offshore, and Arctic Engineering Division of ASME for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received November 4, 2014; final manuscript received February 20, 2017; published online May 5, 2017. Assoc. Editor: Myung Hyun Kim.
J. Offshore Mech. Arct. Eng. Aug 2017, 139(4): 041701 (6 pages)
Published Online: May 5, 2017
Article history
Received:
November 4, 2014
Revised:
February 20, 2017
Citation
Sævik, S., and Thorsen, M. J. (May 5, 2017). "An Analytical Treatment of Buckling and Instability of Tensile Armors in Flexible Pipes." ASME. J. Offshore Mech. Arct. Eng. August 2017; 139(4): 041701. https://doi.org/10.1115/1.4036205
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