Thermal modelling of linear friction welding
Materials & Design
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Shercliff, H., Jedrasiak, P., McAndrew, A., & Colegrove, P. (2018). Thermal modelling of linear friction welding. Materials & Design, 156 362-369. https://doi.org/10.1016/j.matdes.2018.06.043
This paper presents a finite element thermal model for linear friction welding applied to an instrumented weld in Ti6Al4V. The power at the weld interface was estimated fromthemeasured transverse velocity and the cyclic machine load. This was compared with the power history reverse-engineered from thermocouple data. A simple analytical model captured the lateral distribution of heat input at the interface, while geometry changes and heat loss due to the expulsion of flash were included using a sequential step-wise technique, removing interface elements one layer at a time at discrete intervals. Comparison of predicted and experimental power showed a 20% discrepancy, attributed to uncertainty in the power estimate from force and displacement data, and sensitivity to the precision of locating the thermocouples. The thermal model is computationally efficient, and is sufficiently accurate for application to a new thermomechanical modelling approach, developed in a subsequent paper .
linear friction welding, titanium alloys, process modelling, finite element analysis
The work described in this paper was funded by EPSRC through the University of Cambridge Doctoral Training Account, with additional CASE award funding provided by TWI, Granta Park, Cambridge, UK. In addition, funding for the experiments was provided by the Boeing Corporation and EPSRC.
External DOI: https://doi.org/10.1016/j.matdes.2018.06.043
This record's URL: https://www.repository.cam.ac.uk/handle/1810/284571
Attribution 4.0 International
Licence URL: https://creativecommons.org/licenses/by/4.0/