Energy law preserving continuous finite element schemes for a gas metal arc welding system  

作　　者：Yanhai Lin Yongyue Jiang 

机构地区：[1]Fujian Province University Key Laboratory of Computation Science and School of Mathematical Sciences,Huaqiao University,Quanzhou 362021,China [2]School of Mathematics and Physics,University of Science and Technology Beijing,Beijing 00083,China

出　　处：《Communications in Theoretical Physics》2021年第2期30-40,共11页理论物理通讯（英文版）

基　　金：Yanhai Lin was supported by the National Natural Science Foundation of China(Grant No.11702101);the Fundamental Research Funds for the Central Universities and the Promo-tion Program for Young and Middle aged Teacher in Science and Technology Research of Huaqiao University(Grant No.ZQN-PY502);the Natural Science Foundation of Fujian Province(Grant No.2019105093);Quanzhou High-Level Talents Support Plan.

摘　　要：In this paper a modifed continuous energy law was explored to investigate transport behavior in a gas metal arc welding(GMAW)system.The energy law equality at a discrete level for the GMAW system was derived by using the finite element scheme.The mass conservation and current density continuous equation with the penalty scheme was applied 10 improve the stability.According to the phase-field model coupled with the energy law preserving method,the GMAW model was discretized and a metal transfer process with a pulse current was simulated.It was found that the numerical solution agrees well with the data of the metal transfer process obtained by high-speed photography.Compared with the numerical solution of the volume of fuid model,which was widely studied in the GMAW system based on the finite element method Euler scheme,the energy law preserving method can provide better accuracy in predicting the shape evolution of the droplet and with a greater computing efficiency.

关 键 词：phase field gas metal arc welding(GMAW) metal transfer discrete energy law finite element method numerical solution 

分 类 号：TG444.72[金属学及工艺—焊接]