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Vol.24, No.1, 2024, pp. 105–110 |
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NUMERICAL SIMULATION OF FRICTION STIR WELDING - THE PLUNGE STAGE IN T-JOINT Darko Veljić1*, Walid Musrati2, Bojan Međo3, Aleksandar Sedmak4, Nenad Radović3 1) University of Belgrade, Innovation Centre of the Faculty of Technology and Metallurgy, Belgrade, SERBIA *email: dveljic@tmf.bg.ac.rs 2) University of El Mergib, Faculty of Engineering, Khoms, LIBYA 3) University of Belgrade, Faculty of Technology and Metallurgy, Belgrade, SERBIA 4) University of Belgrade, Faculty of Mechanical Engineering, Belgrade, SERBIA
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Abstract This paper deals with the tool plunge stage of friction stir welding which precedes the formation of the T-joint. A three-dimensional numerical model, developed in software package Simulia Abaqus® is applied for numerical analysis. The material of the welding plates is high strength aluminium alloy 2024-T3 of 3 mm thickness. The change of thermomechanical conditions in the welding zones has been analysed, as well as the conditions for eliminating the joining line in the weld root. The tool rotation speed and shoulder plunge depth are varied. Two tools are used for analysis with different tool pin lengths: 2.6 mm and 3 mm. Increase in tool rotation speed raises the temperature in the welding zone and creates conditions for eliminating the joining line in the weld root. In addition, the increased tool pin length is also beneficial. It is obtained that the tool rotation speed exceeding 500 min–1 is necessary for this joint and tool geometries. Keywords: friction stir welding, numerical simulation, temperature field, tool pin |
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