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Publications
Cheng, Y.S., Dong, Y., Chen, H.L., Liu, X. and Garbatov, Y. (2025), Fatigue reliability of epoxy-based coatings on offshore pipeline welded joints under thermal cycles, Innovations in the Analysis and Design of Marine Structures, Garbatov, Y. & Guedes Soares C. (Eds.), Taylor & Francis, London, UK, 683-689.
Offshore pipelines are vulnerable to corrosion, which can cause catastrophic failure. Coating is an essential corrosion protection for offshore pipelines. Thermal cycles have been demonstrated to cause considerable cyclic stress in the coating, which ultimately leads to fatigue failure. This study aims to assess the fatigue reliability of internal epoxy-based coatings on welded joints in offshore pipelines under thermal cycles. The finite element method is used to analyse the thermal strain of the coating surrounding the weld toe. Establish the response surface model for the local strain of the coating. The impact of different parameters on the coating’s local strain is examined. The first-order reliability method and strain-life curves are then used to evaluate the coating’s fatigue reliability. For coating system maintenance planning, fatigue reliability is analysed as a function of the number of pipeline start-up and shut-down cycles.
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