Numerical analysis on the SIF of internal surface cracks in steel pipes reinforced with CRS subjected to bending

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Abstract

In this paper, Composite Repair System (CRS) is applied to repair the circumferential internal surface cracked steel pipes subjected to bending. The Stress Intensity Factor (SIF) is quantitatively analysed by means of numerical simulations, and the crack growth rate is predicted by using the Paris’ law. First, the three-dimensional finite element (FE) model is developed, and its reliability of evaluating SIF of internal surface crack in CRS reinforced pipe is validated. Then based on the FE method and combined with Paris’ law, a case study is deployed to predict the internal surface crack growth in steel pipes reinforced with CRS. The results show that CRS have significantly reduced the SIF of the internal surface crack and decrease the crack growth rate, while unchanging the variation trend of the crack aspect ratio. Afterwards, a parametric study is performed in order to guide the optimisation design of CRS reinforcement.

Original languageEnglish
Pages (from-to)1070-1083
JournalShips and Offshore Structures
Volume15 (2020)
Issue number10
DOIs
Publication statusPublished - 2019

Keywords

  • composite repair system
  • finite element method
  • steel pipes
  • stress intensity factor
  • Surface crack growth

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