Structural integrity of deepwater composite pipes under combined thermal and mechanical loading

James C. Hastie*, Igor A. Guz, Maria Kashtalyan

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

9 Citations (Scopus)
4 Downloads (Pure)


Thermoplastic composite pipe (TCP) is an ideal candidate to replace traditional steel pipes in deepwater applications where high specific strengths and moduli and corrosion resistance are desirable. TCP consists of three layers: an inner thermoplastic liner; structural fibre-reinforced multi-ply laminate; and an outer thermoplastic liner. During deepwater operation the pipe is subjected to thermal gradient, arising from the mismatch between internal fluid and external ocean temperatures, in combination with mechanical loads. In the present work, a 3D finite element (FE) model is used to investigate structural integrity of TCP under combined pressures, tension and thermal gradient by considering yielding of isotropic liners and failure of the laminate at ply-level according to existing stress-based criteria. Different orientations of reinforcing fibres are investigated.

Original languageEnglish
Pages (from-to)850-863
Number of pages14
JournalProcedia Structural Integrity
Early online date1 Dec 2020
Publication statusPublished - 2020
Event1st Virtual European Conference on Fracture, VECF 2020 - Virtual, Online
Duration: 29 Jun 20201 Jul 2020

Bibliographical note

Publisher Copyright:
© 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (


  • Offshore riser
  • Thermomechanical analysis
  • Thermoplastic composite pipe


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