Resistance spot welding (RSW) is a very complicated process involving electromagnetic, thermal, fluid flow, mechanical, and metallurgical variables. Since weld nugget area is closed and unobservable using experimental means, numerical methods are generally used to reveal the nugget formation mechanism. Traditional RSW models focus on the electrothermal 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 multiphysics 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 and their evolutions. Results showed that strong and complicated mass transport appears in the weld nugget and substantially changed the heat transport laws and, therefore, would be able to substantially affect the hardening, segregation, and residual stress of the weld. Compared with the traditional models which could not consider the mass transport, the multiphysics model proposed in this paper could simulate the RSW process with higher accuracy and more realities.
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June 2011
Research Papers
Numerical Analysis of Transport Phenomena in Resistance Spot Welding Process
Qi Shen,
Qi Shen
Ph.D. Candidate
Shanghai Key Laboratory of Digital Autobody Engineering, School of Mechanical Engineering, Shanghai Jiao Tong University
, Shanghai 200240, PR China
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XinMin Lai
XinMin Lai
Professor
State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University
, Shanghai 200240, PR China
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YongBing Li
Associate Professor e-mail:
ZhongQin Lin
Professor
Qi Shen
Ph.D. Candidate
Shanghai Key Laboratory of Digital Autobody Engineering, School of Mechanical Engineering, Shanghai Jiao Tong University
, Shanghai 200240, PR China
XinMin Lai
Professor
State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University
, Shanghai 200240, PR China
J. Manuf. Sci. Eng. Jun 2011, 133(3): 031019 (8 pages)
Published Online: July 1, 2011
Article history
Received:
March 31, 2010
Revised:
May 5, 2011
Online:
July 1, 2011
Published:
July 1, 2011
Citation
Li, Y., Lin, Z., Shen, Q., and Lai, X. (July 1, 2011). "Numerical Analysis of Transport Phenomena in Resistance Spot Welding Process." ASME. J. Manuf. Sci. Eng. June 2011; 133(3): 031019. https://doi.org/10.1115/1.4004319
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