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Bending Analysis of a Flexible Pipe With Broken Tensile Armor Wires

[+] Author Affiliations
José Renato M. de Sousa, Carlos Magluta, Ney Roitman

Federal University of Rio de Janeiro, Rio de Janeiro, Brazil

George C. Campello

Petrobras, Rio de Janeiro, Brazil

Paper No. OMAE2015-41436, pp. V05AT04A038; 14 pages
doi:10.1115/OMAE2015-41436
From:
  • ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 5A: Pipeline and Riser Technology
  • St. John’s, Newfoundland, Canada, May 31–June 5, 2015
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-5651-2
  • Copyright © 2015 by ASME

abstract

In this work, the mechanical response of a damaged 2.5″ flexible pipe under combined tensile and bending loads is studied. A set of experimental tests was carried out either considering the pipe intact or with one up to four broken wires in its outer tensile armor. In these tests, the deflections along the pipe as well as the strains in its outer tensile armor wires were measured thus allowing estimating the bending stiffness of the pipe and the force distribution among the wires, respectively. The results obtained are compared to those provided by a previously presented finite element (FE) model and analytical models. The numerical and analytical predictions agreed well with the experimental measurements pointing to a negligible decrease in the stiffness of the pipe with the increasing number of broken wires and, furthermore, a redistribution of forces among the intact wires of the damaged layer with high stress concentration in the wires close to the damaged ones.

Copyright © 2015 by ASME
Topics: Wire , Pipes , Armor

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