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Vol.11, No2, 2011, pp.131-134 |
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NUMERICAL SIMULATION OF THE PLUNGE STAGE IN FRICTION STIR WELDING Darko Veljić1, Milenko Perović2, Aleksandar Sedmak3, Marko Rakin4, Nikola Bajić1, Bojan Medjo4, Horia Dascau5 1) IHIS Science & Technology Park Zemun, Belgrade, Serbia 2) Chamber of Economy of Montenegro, Podgorica, Montenegro 3) University of Belgrade, Faculty of Mechanical Engineering 4) University of Belgrade, Faculty of Technology and Metallurgy 5) National R&D Institute for Welding and Material Testing, Timisoara, Romania |
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Abstract This paper investigates the plunge stage using numerical modelling. A three-dimensional finite element model (FEM) of the plunge stage is developed using the commercial code ABAQUS to study the thermo-mechanical processes involved during the plunge stage. A coupled thermo-mechanical 3D FE model uses the arbitrary Lagrangian-Eulerian formulation, the Johnson-Cook material law and Coulomb’s Law of friction. The model is developed to study the temperature fields of alloy Al2024-T351 under different process parameters (rotating speed) during the friction stir welding (FSW) process. Numerical results indicate that the maximal temperature of the FSW process can be increased with the increase of rotational speed and that temperature is lower than the melting point of the welding material. In this analysis, temperature, displacement, and mechanical responses are determined simultaneously. The heat generation in FSW can be divided into three parts: frictional heat generated by the tool shoulder, frictional heat generated by the tool pin, and heat generated by material deformation near the pin region. Keywords: numerical simulation, friction stir welding, plunge stage, temperature fields |
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