Thermo-Mechanical Modelling of Laser Welding Process on Aluminium Alloy EN AW 6082-T6
Keywords:laser welding, modelling, finite element, aluminium alloy
In present work, finite element method (FEM) is implemented to investigate the temperature distribution in laser welding of 5mm thick aluminium alloy EN AW 6082- T6. The Gaussian heat source model was used to analyse the influence of peak temperature to the radial distance from the center of the heat source and the thickness of the plate. Temperature-dependent thermal properties of aluminium alloy and the convective-radiative boundary conditions were included in the model. The finite element code, ANSYS along with APDL command subroutines was employed to obtain the numerical results. The effect of heat input and welding speed on the weld pool shape and temperature distribution were investigated. Finally, the predicted temperature distribution and the size of heat-affected zone were compared with the experimental results. The comparison shows that they are in good agreement.