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

Date

2017-11-08

Supervisor/s

Journal Title

Journal ISSN

Volume Title

Publisher

Elsevier

Department

Type

Article

ISSN

0264-1275

Format

Citation

Clément Bühr, Bilal Ahmad, Paul A. Colegrove, et. al., Prediction of residual stress within linear friction welds using a computationally efficient modelling approach. Materials & Design, Volume 139, 2018, Pages 222-233

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.

Description

Software Description

Software Language

Github

Keywords

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

DOI

Rights

Attribution 4.0 International

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