Dry collapse is one of the possible failure modes of flexible pipes. It refers to the situation in which no damage occurs in the flexible pipe external sheath. In this scenario, all layers of the pipe withstand the external pressure loading in a deep-water application. Such a situation is addressed in this work, which proposes some simplified modeling techniques to represent straight and curved flexible pipes subjected to external pressure, undergoing dry collapse during simulation procedure. The results of the proposed models are compared to other reference results, from a fully three-dimensional (3D) finite element model. Good agreement has been got, even with the proposed simplifications with a large reduction in computational cost when compared to full 3D model.
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April 2016
Research-Article
Simplified Finite Element Models to Study the Dry Collapse of Straight and Curved Flexible Pipes
Alfredo Gay Neto,
Alfredo Gay Neto
Department of Structural and
Geotechnical Engineering,
University of São Paulo,
São Paulo, SP 05508-010, Brazil
email: alfredo.gay@usp.br
Geotechnical Engineering,
University of São Paulo,
São Paulo, SP 05508-010, Brazil
email: alfredo.gay@usp.br
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Clóvis de Arruda Martins,
Clóvis de Arruda Martins
Department of Mechanical Engineering,
University of São Paulo,
São Paulo, SP 05508-010, Brazil
University of São Paulo,
São Paulo, SP 05508-010, Brazil
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Eduardo Ribeiro Malta,
Eduardo Ribeiro Malta
Department of Naval Architecture and
Ocean Engineering,
University of São Paulo,
São Paulo, SP 05508-010, Brazil
Ocean Engineering,
University of São Paulo,
São Paulo, SP 05508-010, Brazil
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Rafael Loureiro Tanaka,
Rafael Loureiro Tanaka
Prysmian Cables and Systems,
Santo André, SP 09110-900, Brazil
Santo André, SP 09110-900, Brazil
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Carlos Alberto Ferreira Godinho
Carlos Alberto Ferreira Godinho
Prysmian Cables and Systems,
Santo André, SP 09110-900, Brazil
Santo André, SP 09110-900, Brazil
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Alfredo Gay Neto
Department of Structural and
Geotechnical Engineering,
University of São Paulo,
São Paulo, SP 05508-010, Brazil
email: alfredo.gay@usp.br
Geotechnical Engineering,
University of São Paulo,
São Paulo, SP 05508-010, Brazil
email: alfredo.gay@usp.br
Clóvis de Arruda Martins
Department of Mechanical Engineering,
University of São Paulo,
São Paulo, SP 05508-010, Brazil
University of São Paulo,
São Paulo, SP 05508-010, Brazil
Eduardo Ribeiro Malta
Department of Naval Architecture and
Ocean Engineering,
University of São Paulo,
São Paulo, SP 05508-010, Brazil
Ocean Engineering,
University of São Paulo,
São Paulo, SP 05508-010, Brazil
Rafael Loureiro Tanaka
Prysmian Cables and Systems,
Santo André, SP 09110-900, Brazil
Santo André, SP 09110-900, Brazil
Carlos Alberto Ferreira Godinho
Prysmian Cables and Systems,
Santo André, SP 09110-900, Brazil
Santo André, SP 09110-900, Brazil
1Corresponding author.
2Annulus is the region of the flexible pipe located between internal and external polymeric layers.
Contributed by the Ocean, Offshore, and Arctic Engineering Division of ASME for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received January 5, 2015; final manuscript received November 13, 2015; published online January 21, 2016. Assoc. Editor: Myung Hyun Kim.
J. Offshore Mech. Arct. Eng. Apr 2016, 138(2): 021701 (9 pages)
Published Online: January 21, 2016
Article history
Received:
January 5, 2015
Revised:
November 13, 2015
Citation
Neto, A. G., Martins, C. D. A., Malta, E. R., Tanaka, R. L., and Godinho, C. A. F. (January 21, 2016). "Simplified Finite Element Models to Study the Dry Collapse of Straight and Curved Flexible Pipes." ASME. J. Offshore Mech. Arct. Eng. April 2016; 138(2): 021701. https://doi.org/10.1115/1.4032156
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