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Finite Element Analysis of Cyclically-Loaded Steel Pipes During Deep Water Reeling installation

Authors:

G. Chatzopoulou, University of Thessaly, Volos, Greece

S.A. Karamanos, University of Thessaly, Volos, Greece

G.E. Varelis, PDL Solutions (Europe) Ltd, Hexham, United Kingdom

Proceedings of the ASME 2015 Pressure Vessels & Piping Division Conference - PVP 2015, At Boston, MA, USA

Link: http://www.asmeconferences.org/PVP2015/  

Abstract

Thick-walled steel pipes during their installation in deep-water are subjected to combined loading of external pressure and bending, which may trigger structural instability due to excessive pipe ovalization. In the case of reeling method, prior to deep-water installation the pipe is subjected to strong cyclic bending loading resulting in the development of initial ovalitization, and residual stresses, which may affect pipe structural performance. Using advanced material models and finite element tools, the present study examines the effect of cyclic loading due to reeling on the mechanical behavior of thick-walled seamless steel pipes. In particular, it examines the effects of reeling on cross-sectional ovalization and the corresponding material anisotropy and, most importantly on pipe resistance against high external pressure and pressurized bending. The results show that induces the reeling process significant anisotropy and ovalization. It is also shown that, the mechanical resistance of reeled pipes is lower than the resistance of no-reeled pipes mainly because of the cross-sectional ovalization at the end of reeling process.

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Posted: 1st Sep 2015 in 'PDL Research and Collaboration'
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Keywords for: PDL Research and Collaboration | Finite Element Analysis of Cyclically-Loaded Steel Pipes During Deep Water Reeli

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