ZHANG Jin-qi, LI Jian-mei, LU Chang-hou, FANG Xin-xin, MA Zhuo

(College of Mechanical Engineering, Shandong University, Jinan 250061, China)

 

Abstract: Aiming at solving the difficulty in measuring the transient laser thermal effects with the test method because of the quick processing, the numerical simulation was used in the research of the physical mechanisms of laser processing and the optimal processing parameters for the actual laser processing was provided. Based on the analysis and summary of the research achievements on numerical simulation method, the physical phenomena and its related laser energy density were analyzed. The numerical simulation methods of thermal effects were reviewed, including analytical method, finite differential method(FDM), finite volume method(FVM) and finite element method (FEM). And their advantages, disadvantages and applicable conditions were analyzed. The choice of the multiphysics, such as heat transfer field, fluid field and force field were discussed. The influences of material and laser properties on laser thermal effect were listed. The results show that numerical simulation developed towards complexity, comprehensiveness and diversity. Finally, it present some suggestions for the future of the numerical simulation of laser thermal effects.

Key words: laser technique; thermal effects; numerical simulation; physics