The evolution of voids (damage) in friction stir welding processes was simulated using a void growth model that incorporates viscoplastic flow and strain hardening of incompressible materials during plastic deformation. The void growth rate is expressed as a function of the void volume fraction, the effective deformation rate, and the ratio of the mean stress to the strength of the material. A steady-state Eulerian finite element formulation was employed to calculate the flow and thermal fields in three dimensions, and the evolution of the strength and damage was evaluated by integrating the evolution equations along the streamlines obtained in the Eulerian configuration. The distribution of internal voids within the material was qualitatively compared with experimental results, and a good agreement was observed in terms of the spatial location of voids. The effects of pin geometry and operational parameters such as tool rotational and travel speeds on the evolution of damage were also examined.
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April 2008
Research Papers
Modeling Damage Evolution in Friction Stir Welding Process
Youliang He,
Youliang He
Sibley School of Mechanical and Aerospace Engineering,
Cornell University
, Ithaca, NY 14853
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Paul R. Dawson,
Paul R. Dawson
Sibley School of Mechanical and Aerospace Engineering,
Cornell University
, Ithaca, NY 14853
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Donald E. Boyce
Donald E. Boyce
Sibley School of Mechanical and Aerospace Engineering,
Cornell University
, Ithaca, NY 14853
Search for other works by this author on:
Youliang He
Sibley School of Mechanical and Aerospace Engineering,
Cornell University
, Ithaca, NY 14853
Paul R. Dawson
Sibley School of Mechanical and Aerospace Engineering,
Cornell University
, Ithaca, NY 14853
Donald E. Boyce
Sibley School of Mechanical and Aerospace Engineering,
Cornell University
, Ithaca, NY 14853J. Eng. Mater. Technol. Apr 2008, 130(2): 021006 (10 pages)
Published Online: March 12, 2008
Article history
Received:
July 26, 2007
Revised:
December 19, 2007
Published:
March 12, 2008
Citation
He, Y., Dawson, P. R., and Boyce, D. E. (March 12, 2008). "Modeling Damage Evolution in Friction Stir Welding Process." ASME. J. Eng. Mater. Technol. April 2008; 130(2): 021006. https://doi.org/10.1115/1.2840963
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