Failure analysis of thermoplastic composite pipe (TCP) under combined pressure, tension and thermal gradient for an offshore riser application

James C. Hastie* (Corresponding Author), Maria Kashtalyan, Igor Guz

*Corresponding author for this work

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1 Citation (Scopus)


Useful characteristics of fibre-reinforced thermoplastics, including high specific strengths and moduli and excellent corrosion resistance, make them ideal candidates for offshore riser pipe applications. When in operation, risers are subjected to combined mechanical and thermal loading. In the present paper, a 3D finite element (FE) model is used to analyse stress state in a section of thermoplastic composite pipe (TCP), consisting of a fibre-reinforced thermoplastic laminate fully bonded between inner and outer thermoplastic liners, under conditions illustrative of a deepwater riser application. The effects of varying combinations of pressure and thermal differentials on the distribution of stress-based failure coefficient are examined. Failure responses under different axial tensions at low/high pressures and temperatures are assessed for configurations with different laminate ply stacking sequences. Temperature-dependent material properties are considered in the thermomechanical analysis.
Original languageEnglish
Article number103998
JournalInternational Journal of Pressure Vessels and Piping
Early online date24 Oct 2019
Publication statusPublished - Dec 2019



  • Thermoplastic composite pipe
  • Composite riser pipe
  • Pressure gradient
  • Thermal gradient

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