NUMERICAL ANALYSIS OF TRANSPORT PHENOMENA IN RESISTANCE SPOT WELDING PROCESS

被引:0
|
作者
Li, Yong Bing [1 ]
Lin, Zhong Qin [1 ]
Li, Li
Chen, Guan Long [1 ]
机构
[1] Shanghai Jiao Tong Univ, Shanghai Key Lab Digital Autobody Engn, Shanghai 200030, Peoples R China
来源
PROCEEDINGS OF THE ASME FLUIDS ENGINEERING DIVISION SUMMER CONFERENCE, VOL 1, PTS A-C | 2009年
关键词
PHASE-CHANGE PROBLEMS; HEAT-TRANSFER; MUSHY REGION; HYBRID MODEL; METHODOLOGY; ELECTRODES; CONVECTION;
D O I
暂无
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Resistance Spot Welding (RSW) is a very complicated process involving electro-magnetic, thermal, fluid flow, mechanical and metallurgical variables. Since weld nugget area is close and unobservable with experimental means, numerical methods are mainly used to reveal the nugget formation mechanism. Traditional RSW models focus on the electro-thermal behaviors in the nugget, and do not have the ability to model mass transport caused by induced magnetic forces in the molten nugget. In this paper, a multi-physics model, which comprehensively considers the coupling of electric, magnetic, thermal and flow fields during RSW, temperature-dependent physical properties and phase transformation, is used to investigate the heat and mass transport laws in the weld nugget and to reveal the interaction of the heat and mass transports. Results show that the heat transport behaviors in the weld nugget, the profile of the nugget, and the thermal field evolution are significantly changed when the mass transport is considered. At the same time, a good agreement is also found between experimental and numerically calculated nugget sizes. As a result, when predicting crystal growth process, the effects of the mass transport should be considered in order to obtain a more accurate prediction results.
引用
收藏
页码:1173 / 1181
页数:9
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