Abstract
Two contact models are used to simulate the thermo-mechanical interaction process in friction stir welding. Comparison shows that the classical Coulomb friction model can be accurate enough for the simulation of friction stir welding in lower angular velocity. But in higher angular velocity, the classical Coulomb friction model fails to work due to the increase of the dynamic effect of the welding tool. Because the shear failure of material is considered in modified Coulomb friction model, the increase of the frictional stress on the tool–plate interface is limited by the shear failure. So, this model can keep valid even when the angular velocity of the welding tool is increased to a high level.
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Acknowledgements
This work was supported by the National Natural Science Foundation (Nos. 10302007, 10421202, and 10225212), the National High Technology Research and Development Program of China (2006AA09Z326) and Science Research Foundation of Dalian University of Technology. The author would like to thank Prof. Z.Y. Ma at the Institute of Metal Research in Chinese Academy of Sciences for his valuable discussions and suggestions.
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Zhang, Z. Comparison of two contact models in the simulation of friction stir welding process. J Mater Sci 43, 5867–5877 (2008). https://doi.org/10.1007/s10853-008-2865-x
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DOI: https://doi.org/10.1007/s10853-008-2865-x