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On Lateral Buckling Failure of Armour Wires in Flexible Pipes

[+] Author Affiliations
Niels H. O̸stergaard

NKT-Flexibles; Aalborg University, Aalborg, Denmark

Anders Lyckegaard

NKT-Flexibles, Aalborg, Denmark

Jens H. Andreasen

Aalborg University, Aalborg, Denmark

Paper No. OMAE2011-49358, pp. 289-298; 10 pages
  • ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 4: Pipeline and Riser Technology
  • Rotterdam, The Netherlands, June 19–24, 2011
  • ISBN: 978-0-7918-4436-6
  • Copyright © 2011 by ASME


This paper introduces the concept of lateral buckling of tensile armour wires in flexible pipes as a failure mode. This phenomenon is governed by large deflections and is therefore highly non-linear. A model for prediction of the wire equilibrium state within the pipe wall based on force equilibrium in curved beams and curvature expressions derived from differential geometry is presented. On this basis, a model of the global equilibrium state of the armour layers in flexible pipes is proposed. Furthermore, it is demonstrated how this model can be used for lateral buckling prediction. Obtained results are compared with experiments.

Copyright © 2011 by ASME
Topics: Wire , Pipes , Buckling , Failure , Armor



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