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Finite element analysis on electromagnetic forming of DP780 high-strength steel sheets

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Abstract

In this paper, the effects of strain rate on the mechanical properties of DP780 were analyzed by quasi-static tensile test and Hopkinson bar test; Johnson-Cook constitutive model with high strain rate was established. Based on ANSYS/LS-DYNA finite element program, the finite element simulation of electromagnetic forming process of high-strength steel sheet under the action of driving plate was realized, and the influence of various process parameters on the forming height was studied. The results showed that the yield strength and ultimate tensile strength of the material increased with high strain rate, and DP780 high-strength steel had certain strain rate sensitivity. The drive sheet receives the maximum magnetic field force near the outermost two-turn coil. The deformation of high-strength steel plate mainly occurs under the action of impact inertia. The peak forming height increases with the rise of discharge frequency. The increase of the thickness of the drive sheet can reduce the forming efficiency.

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Funding

This work was supported by the National Natural Science Foundation of China.(Award Number: 51465041) and Natural Science Foundation of Jiangxi Provice. (Award Number: 2018ACB21019 and 20192BCBL23002).

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Authors and Affiliations

  1. School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University, No. 696, Fenghe South Avenue, Nanchang, 330063, Jiangxi Province, China

    Dahai Liu, Bo Li, Zhenghua Guo & Zengxin Huang

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  1. Dahai Liu
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  2. Bo Li
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  3. Zhenghua Guo
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  4. Zengxin Huang
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The first author Dahai Liu did the experiment and wrote the paper, the second author Bo Li assisted the first author to complete the paper, and other authors edited and corrected the paper.

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Correspondence to Dahai Liu.

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Liu, D., Li, B., Guo, Z. et al. Finite element analysis on electromagnetic forming of DP780 high-strength steel sheets. Int J Adv Manuf Technol 112, 1617–1629 (2021). https://doi.org/10.1007/s00170-020-06537-7

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  • DOI: https://doi.org/10.1007/s00170-020-06537-7

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