Abstract
Since the deformation region involves the interaction of electric-thermal-force coupling in electric hot incremental sheet forming, the numerical simulation of the forming process is unusually difficult. Currently, the thermal-force coupling method is adopted to simulate approximately the whole forming process, and the Joule heating effect is often ignored. Therefore, the numerical simulation of the Joule heating effect is especially significant for the prediction accuracy of forming process. In this paper, a novel numerical simulation method considering electric-thermal-force parameters was proposed to update the thermal-force condition of the forming region instantly. Meanwhile, the model of contact thermal conductance was established, combining geometrical and electric-thermal parameters. Then a high-precision finite element model was obtained to predict the Joule heating effect of the forming region. In addition to this, the impact of thermal superposition on forming temperature was further analyzed, and a modified model of contact thermal conductance was established in electric hot incremental sheet forming.
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Funding
This work was supported by the National Natural Science Foundation of China (Grant No. 51175257), the Scientific and Technological Research Program of Chongqing Science and Technology Bureau (Grant No. cstc2021jcyj-msxmX1047), and the Talent Introduction Project of Kunming University (Grant No. XJ20210033).
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Zhengfang Li: conceptualization, investigation, formal analysis, writing — original draft. Songlin He: investigation, formal analysis. Yuhang Zhang: formal analysis, investigation. Zhiguo An: investigation, funding acquisition, writing — review and editing. Zhengyuan Gao: investigation, writing — review and editing. Shihong Lu: formal analysis, funding acquisition.
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Li, Z., He, S., Zhang, Y. et al. Numerical prediction of Joule heating effect in electric hot incremental sheet forming. Int J Adv Manuf Technol 121, 8221–8230 (2022). https://doi.org/10.1007/s00170-022-09888-5
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DOI: https://doi.org/10.1007/s00170-022-09888-5