Simplified Finite Element Models to Study the Wet Collapse of Straight and Curved Flexible Pipes: Fid-Bau Portal

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Simplified Finite Element Models to Study the Wet Collapse of Straight and Curved Flexible Pipes

Gay Neto, Alfredo

When the external sheath of flexible pipes experiences damage, seawater floods the annulus. Then, the external pressure is applied directly on the internal polymeric layer, and the load is transferred to the interlocked carcass, the innermost layer. In this situation, the so-called wet collapse failure of the interlocked carcass can occur. Simplified methodologies to address such a scenario, using restricted three-dimensional (3D) finite element models, are presented in this work. They are compared with full 3D models, studying both straight and curved flexible pipes scenarios. The curvature of the flexible pipe is shown to be important for wet collapse pressure predictions.

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Simplified Finite Element Models to Study the Wet Collapse of Straight and Curved Flexible Pipes

Gay Neto, Alfredo

When the external sheath of flexible pipes experiences damage, seawater floods the annulus. Then, the external pressure is applied directly on the internal polymeric layer, and the load is transferred to the interlocked carcass, the innermost layer. In this situation, the so-called wet collapse failure of the interlocked carcass can occur. Simplified methodologies to address such a scenario, using restricted three-dimensional (3D) finite element models, are presented in this work. They are compared with full 3D models, studying both straight and curved flexible pipes scenarios. The curvature of the flexible pipe is shown to be important for wet collapse pressure predictions.

Simplified Finite Element Models to Study the Wet Collapse of Straight and Curved Flexible Pipes

Gay Neto, Alfredo

When the external sheath of flexible pipes experiences damage, seawater floods the annulus. Then, the external pressure is applied directly on the internal polymeric layer, and the load is transferred to the interlocked carcass, the innermost layer. In this situation, the so-called wet collapse failure of the interlocked carcass can occur. Simplified methodologies to address such a scenario, using restricted three-dimensional (3D) finite element models, are presented in this work. They are compared with full 3D models, studying both straight and curved flexible pipes scenarios. The curvature of the flexible pipe is shown to be important for wet collapse pressure predictions.

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Title:

Simplified Finite Element Models to Study the Wet Collapse of Straight and Curved Flexible Pipes

Contributors:

Gay Neto, Alfredo (author) / de Arruda Martins, Clóvis / Malta, Eduardo Ribeiro / Tanaka, Rafael Loureiro / Godinho, Carlos Alberto Ferreira

Published in:

Journal of offshore mechanics and arctic engineering ; 139

Publication date:

2017

ISSN:

DOI:

https://doi.org/10.1115/1.4037291

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Offshorebauwerk , Meerestechnik , Zeitschrift , Arktis , Technik , Offshore-Technik

Classification:

BKL: 50.92 / 50.99 Technik allgemein: Sonstiges / 56.30 Wasserbau / 50.92 Meerestechnik / 56.30 / 50.99
Local classification TIB: 770/7035

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