An analytical model for the prediction of load distribution in highly torqued multi-bolt composite joints

C. T. McCarthy, P. J. Gray

Research output: Contribution to journalArticlepeer-review

Abstract

This paper presents the development of an enhanced analytical approach for modelling the load distribution in multi-bolt composite joints. The model is a closed-form extension of a spring-based method, where bolts and laminates are represented by a series of springs and masses. The enhancement accounts for static friction effects between the laminates, a primary mechanism of load transfer in highly torqued bolted joints. The method is validated against detailed three-dimensional finite element models and where possible, experimental results. The effect of varying bolt-torque and bolt-hole clearance on the load distribution in a three-bolt, single-lap joint is investigated and the method proves to be robust, accurate and highly efficient. Finally, the method is employed in a parameter study, where increasing bolt torque levels can be used for achieving a more even load distribution in multi-bolt joints.

Original languageEnglish
Pages (from-to)287-298
Number of pages12
JournalComposite Structures
Volume93
Issue number2
DOIs
Publication statusPublished - Jan 2011

Keywords

  • Analytical model
  • Bolted joints
  • Clearance
  • Composites
  • Friction

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