激光焊接过程多尺度数值模拟研究现状与展望OACSTPCD

As an advanced welding technology,laser welding technology has been widely used in high-end manufacturing industries,while the complex thermodynamic behaviors of the keyhole and the molten pool determines the quality of the joint,which has influences on the further development and the applications of laser welding technology.Numerical simula-tion methods have been widely used in basic theoretical research of welding such as multi-physical filed behaviors of weld-ing process because of its their low cost and high efficiency.At present,numerical simulation methods with different scales had been developed in the multi-physics field research of laser welding.Based on the research achievements at home and abroad,the main methods and research contents used in the numerical simulation of laser welding at the atomic scale,micro-scale,macro-scale,and multi-scale coupling were summarized in this paper,and their characteristics were analyzed.Finally,the prospect of the development of multi-scale numerical simulation of laser welding was discussed.