Numerical simulation for temperature filed and stress field in DE-GMAW
DE-GMAW (Double Electrode Gas Metal Arc Welding) is a novel welding technology. Based on the research of physical phenomena of DE-GMAW process, a new hybrid heat source model suitable for DE-GMAW was proposed. The hybrid heat source consisted of a body heat source and a surface heat source, where the body heat source simulated the heat added into workpiece by molten welding wire and surface heat source simulated the heat added into workpiece generated by arc. The simulated results show that the new surface-body hybrid heat source can reflect the characteristics of DE-GMAW accurately. With the increase of bypass current, the temperature of weld center decreased gradually. Compared with the traditional welding method, DE-GMAW can reduce the heat input of base metal effective. The maximum tensile stress and compressive stress near weld had a trend of decline and residual tensile stress of weld after welding decreased obviously.
DE-GMAW heat source model numerical simulation temperature field stress
Yu Shi Rihong Han Jiankang Huang Ding Fan
Key Laboratory of Non-ferrous Metal Alloys and processing,The Ministry of Education,Lanzhou Universi State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology
国际会议
济南
英文
1-7
2012-08-24（万方平台首次上网日期，不代表论文的发表时间）