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Numerical-Analytical Prediction of the Collapse of Flexible Pipes Under Bending and External Pressure

[+] Author Affiliations
Walter C. Loureiro, Jr.

Petrobras, Rio de Janeiro, RJ, Brazil

Ilson P. Pasqualino

COPPE/Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil

Paper No. OMAE2012-83476, pp. 353-359; 7 pages
  • ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 3: Pipeline and Riser Technology
  • Rio de Janeiro, Brazil, July 1–6, 2012
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-4490-8
  • Copyright © 2012 by ASME


This work gathers the phenomena indicated through the available literature and industry standards as determinant in the evaluation of the collapse of flexible pipes under combined bending and external pressure. It also proposes a complete analytical formulation to assess the collapse strength. The effects of dimensional variations and added ovalization due to bending are combined to evaluate the final collapse pressure. Numerical models are generated for comparison purposes and experimental results are used to validate the formulation proposed. The good agreement obtained between numerical and analytical predictions show that is possible to determine the curve collapse of flexible pipes through analytical approaches.

Copyright © 2012 by ASME



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