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Effect of Anisotropic Plasticity on the Prediction of Formability of E-Form Magnesium Alloy Sheet

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Abstract

In this paper, the formability of E-FORM magnesium alloy sheet (as one of recent alloys for automotive magnesium sheets) is analyzed based on the comparison between the results of actual magnesium (Mg) roof forming and those of finite element (FE) simulations. The FE model considers anisotropic mechanical properties and forming limit diagram (FLD) of the investigated magnesium alloy sheet. Through the coupled experimental and numerical procedure, the dominating factors for improving the accuracy of the numerical simulations are further studied. A commercial finite element analysis program, AUTOFORM®, is used for the simulations, in which identified mechanical properties and forming limit criteria are implemented as functions of temperature and strain rate. The improvement in the prediction of formability during the warm forming of the E-FORM magnesium alloy sheet can be obtained by considering a modified hardening law at large strain region, sheet anisotropy, and the properly measured forming limit curve.

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Acknowledgement

This work was supported by Research Resettlement Fund for the new faculty of Seoul National University (Grant No. 0668-20180066). MGL and YHL also appreciate the support from National Research Foundation of Korea (NRF2012R1A5A1051500).

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Authors and Affiliations

  1. Advanced Technology Strategy Team, Ssangyong Motor Co., 455-12 Dongsak-ro, Pyeongtaek-si, Gyeonggi, 17749, Korea

    Yongheon Lee

  2. Q&C TECH, #A-823, 167 Songpa-daero, Songpa-gu, Seoul, 05855, Korea

    Seungyoon Jung & Hansung Baek

  3. Materials Deformation Department, Korea Institute of Materials Science, 797 Changwon-daero, Seongsan-gu, Changwon-si, Gyeongnam, 51508, Korea

    Jinwoo Lee

  4. Innovative Engineering Team, Eum Creative, Rm.201, 49 Sincheon-daero 71beon-gil, Busanjin-gu, Busan, 47352, Korea

    Moon-Seok Choi

  5. Department of Materials Science and Engineering & RIAM, Seoul National University, Seoul, 08826, Korea

    Myoung-Gyu Lee

Authors
  1. Yongheon Lee
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  2. Seungyoon Jung
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  3. Hansung Baek
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  4. Jinwoo Lee
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  5. Moon-Seok Choi
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  6. Myoung-Gyu Lee
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Correspondence to Myoung-Gyu Lee.

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Lee, Y., Jung, S., Baek, H. et al. Effect of Anisotropic Plasticity on the Prediction of Formability of E-Form Magnesium Alloy Sheet. Int.J Automot. Technol. 20, 1183–1193 (2019). https://doi.org/10.1007/s12239-019-0111-y

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  • DOI: https://doi.org/10.1007/s12239-019-0111-y

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