Numerical investigation of residual ultimate strength of dented metallic pipes subjected to pure bending

Jie Cai, Xiaoli Jiang, Gabriel Lodewijks

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)
71 Downloads (Pure)

Abstract

A dent is one of the main structural damages that may affect ultimate strength. In this paper, the residual ultimate strength of dented metallic pipes subjected to a bending moment is quantitatively investigated. The numerical model is developed accounting for the variation of the dent length (ld), dent depth (dd), dent width (wd), dent rotation angle (θd) and dent location based on ABAQUS Python. The numerical model is validated by test results from a four-point bending test. Subsequently, a parametric investigation is performed on the effects of wave-type initial imperfection, D/t and dent geometrical parameters. It is found that both ld and dd have a significant effect on the residual ultimate strength of dented metallic pipes, while the effect of wd is slight. Finally, an empirical formula with respect to ld and dd has been proposed for the prediction of bending moment, which can be deployed for practical purposes.

Original languageEnglish
Pages (from-to)519-531
JournalShips and Offshore Structures
Volume13
Issue number5
DOIs
Publication statusPublished - 2018

Keywords

  • bending moment
  • dent
  • empirical formula
  • metallic pipe
  • nonlinear FEM
  • Residual ultimate strength

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