Prediction of residual stress within linear friction welds using a computationally efficient modelling approach

Clement Buhr, Bilal Ahmed, Paul A. Colegrove, Anthony R. McAndrew, Hua Guo, Xiang Zhang

Research output: Contribution to journalArticle

14 Citations (Scopus)
51 Downloads (Pure)

Abstract

Modelling the mechanical mixing occurring at the interface of a linear friction weld (LFW) is complex,making it difficult to study the development of residual stresses within real engineering workpieces. To address this, a sequentially coupled
numerical model of a Ti-6Al-4V LFW was developed, bypassing the modelling of the oscillations by applying the heat at the weld interface and sequentially removing rows of elements to account for the burn-off. Increasing the rubbing velocity was found to numerically increase the peak of residual stress while narrowing the distribution. Only small changes arose from increasing the applied pressure or changing the oscillation direction. Predictions suggested a strong correlation between the phase 3 temperature profile and the residual stress field subsequently created. Validation against neutron diffraction and contour method are also presented. This approach provides a computationally efficient technique to study the residual stress development within large 3D structures.
Original languageEnglish
Pages (from-to)222-233
Number of pages12
JournalMaterials & Design
Volume139
Early online date8 Nov 2017
DOIs
Publication statusPublished - 5 Feb 2018

Bibliographical note

This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)

Keywords

  • Linear friction welding
  • Titanium
  • Residual stress
  • Modelling
  • Experiments

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