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Collapse Mechanism of Unbounded Metal-Composite Pipes Under Hydrostatic Pressure

[+] Author Affiliations
Ilson Paranhos Pasqualino, Theodoro Antoun Netto

COPPE/UFRJ, Rio de Janeiro, RJ, Brazil

Flavio Antoun Netto

Brazilian Navy, Rio de Janeiro, RJ, Brazil

Paper No. OMAE2008-57457, pp. 399-404; 6 pages
doi:10.1115/OMAE2008-57457
From:
  • ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering
  • Volume 3: Pipeline and Riser Technology; Ocean Space Utilization
  • Estoril, Portugal, June 15–20, 2008
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-4820-3 | eISBN: 0-7918-3821-8
  • Copyright © 2008 by ASME

abstract

Metal-composite pipes are feasible alternatives for deepwater applications where thermal insulation and structural behavior requirements must be met. They are composed of an inner metal pipe and an outer structural composite layer which act in combination to provide excellent structural strength and additional thermal insulation. In this work, the mechanical behavior of such pipes under external pressure is investigated through numerical analyses and experimental tests. Small scale models were tested under external pressure to calibrate a finite element based numerical model. The FE model incorporates nonlinear kinematics, progressive failure analyses of the composite layer, and metal elastic-plastic behavior. Unbounded interface between metal and composite was assumed through frictionless surface-based contact model in other to obtain a conservative estimate of the metal-composite pipe performance under external pressure.

Copyright © 2008 by ASME

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