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Induced electromagnetic stirring behavior in a resistance spot weld nugget

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Abstract

A multi-physics hybrid numerical model, which couples electric, magnetic, thermal and flow fields, was used to investigate electromagnetic stirring behavior in a resistance spot weld nugget. The differences of two kinds of different excitation inputs, i.e., a sinusoidal current and its root-mean-square (RMS) value, were studied to examine if they could produce equivalent electromagnetic stirring effects in the weld nugget. Research showed that the two types of current inputs could produce almost identical fluid flow and heat transfer patterns and consistent evolution of flow and thermal fields in the nugget. At the end of the welding cycles, the maximum flow velocity and temperature between the two inputs differed by 11.6% and 0.3%, respectively. Therefore, the RMS current can be assumed to produce an approximately equivalent electromagnetic stirring effect with the sinusoidal current, and can be used in the future research to greatly improve the solution efficiency of the electromagnetic stirring behavior in the resistance spot weld nugget.

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Authors and Affiliations

  1. Shanghai Key Laboratory of Digital Autobody Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

    YongBing Li, ZhongQin Lin, XinMin Lai & GuanLong Chen

  2. State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, 200240, China

    ZhongQin Lin, XinMin Lai & GuanLong Chen

  3. Welding Engineering Institute, Shanghai Jiao Tong University, Shanghai, 200240, China

    Ke Zhang

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  1. YongBing Li
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  2. ZhongQin Lin
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  3. XinMin Lai
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  5. Ke Zhang
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Correspondence to YongBing Li.

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Li, Y., Lin, Z., Lai, X. et al. Induced electromagnetic stirring behavior in a resistance spot weld nugget. Sci. China Technol. Sci. 53, 1271–1277 (2010). https://doi.org/10.1007/s11431-010-0086-4

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  • DOI: https://doi.org/10.1007/s11431-010-0086-4

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