A COUPLED THERMO-MECHANICAL MODEL OF FRICTION STIR WELDING

Abstract

A coupled thermo-mechanical model was developed to study the temperature fields, the plunge orce and the plastic deformations of Al alloy 2024-T351 under different rotating speed: 350, 400 nd 450 rpm, during the friction stir welding (FSW) process. Three-dimensional FE model has een developed in ABAQUS/Explicit using the arbitrary Lagrangian-Eulerian formulation, the ohnson-Cook material law and the Coulomb's Law of friction. Numerical results indicate that he maximum temperature in the FSW process is lower than the melting point of the welding aterial. The temperature filed is approximately symmetrical along the welding line. A lower lastic strain region can be found near the welding tool in the trailing side on the bottom surface. ith increasing rotation speed, the low plastic strain region is reduced. When the rotational speed s increased, the plunge force can be reduced. Regions with high equivalent plastic strains are bserved which correspond to the nugget and the flow arm.

Keywords

Dates

  • Submission Date2011-07-29
  • Revision Date2011-12-12
  • Acceptance Date2012-01-06

DOI Reference

10.2298/TSCI110729012V

References

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