A new method for stress analysis of tubular joints in offshore platform

Jing Su, Xiao Ling Zhao, Gang Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Fatigue damage in welded tubular joints is almost unavoidable due to combined effect of stress concentration and random stresses. To improve accuracy of fatigue life estimation of welded tubular joints, a new structural stress approach for tubular joints is proposed, where a point below the outer surface along the wall thickness direction is adopted as the fatigue assessment point. The applicability and correctness of the new method for fatigue strength assessment of tubular joints, as well as its effectiveness in considering the stress gradient along the wall thickness, are verified by comparing the numerical results with published experimental data of fatigue tests. Based on finite element analysis, parametric equations are derived for calculating stress concentration factors at all angular positions along the intersection of tubular T-joints. The accuracy of the parametric equations is finally validated.

Original languageEnglish
Pages (from-to)1449-1461
Number of pages13
JournalChuan Bo Li Xue/Journal of Ship Mechanics
Volume20
Issue number11
DOIs
Publication statusPublished - 1 Nov 2016
Externally publishedYes

Keywords

  • Fatigue life
  • Stress concentration
  • Stress gradient
  • Structural stress
  • Welded tubular joints

ASJC Scopus subject areas

  • Ocean Engineering
  • Mechanical Engineering

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