Numerical simulation research of friction stir welding based on SPH method
Smoothed particle hydrodynamics(SPH)is a meshless method based on Lagrangian.ABAQUS software was used to simulate the friction stir welding of AZ31B magnesium alloy based on the SPH method.By changing the rotation speed of the stirring too,the distributions of residual stress and temperature were studied.The results show that the distribution of residual stress on both sides of the weld is asymmetrical,and the stress on the retreating side is greater than that on the advancing side;the stress curve has bimodal characteristics,showing tensile stress in the welding area;as the rotational speed increases,the stress distribution of the workpiece becomes more uniform;the temperature distribution on both sides of the weld is asymmetrical,and the advancing side is higher than the retreating side,and the temperature rises with the increase of the rotational speed;the longitudinal temperature curve presents an M-shaped distribution.The simulation results have certain reference significance for the selection of welding parameters in the actual welding process.
NETL
NSTL
万方数据
维普
