Finite element analysis and formulae for stress concentration factors of diamond bird-beak SHS T-joints

Le Wei Tong, Guowen Xu, Yongqiang Liu, Dongqiang Yan, Xiao Ling Zhao

Research output: Contribution to journalArticleResearchpeer-review

32 Citations (Scopus)

Abstract

A diamond bird-beak T-joint is similar to a conventional T-joint except that the brace member and chord member both rotates 45º. Previous research demonstrated that the diamond bird-beak joint has better static and fatigue behaviour than a conventional joint. Experimental testing has been reported by the authors to determine the stress concentration factors (SCFs) of diamond bird-beak SHS T-joints. This paper fills the knowledge gap through FE analysis, parametric study and proposed SCF formulae for such joints. Three-dimensional finite element (FE) models were developed and validated by experimental data. The FE model was utilized for parametric study on SCFs for diamond bird-beak SHS T-joints to investigate the influence of key non-dimensional geometric parameters β (ratio of brace width to chord width), 2γ (ratio of chord width to chord thickness) and τ (ratio of brace thickness to chord thickness). Finally SCF formulae were proposed for diamond bird-beak SHS T-joints under four loading cases, namely axial force and in-plane bending in the brace, as well as axial force and in-plane bending in the chord.
Original languageEnglish
Pages (from-to)108 - 120
Number of pages13
JournalThin-Walled Structures
Volume86
DOIs
Publication statusPublished - Jan 2015

Keywords

  • Square hollow section (SHS)
  • Diamond bird-beak T-joint
  • Stress concentration factor (SCF)
  • Finite element analysis
  • SCF formulae

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