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International Journal of Automotive Technology

, Volume 20, Issue 6, pp 1183–1193 | Cite as

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

  • Yongheon Lee
  • Seungyoon Jung
  • Hansung Baek
  • Jinwoo Lee
  • Moon-Seok Choi
  • Myoung-Gyu LeeEmail author
Article
  • 14 Downloads

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.

Key Words

Mg alloy Finite element analysis Warm forming Anisotropy Hardening Formability 

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Notes

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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Copyright information

© KSAE/ 111-11 2019

Authors and Affiliations

  • Yongheon Lee
    • 1
  • Seungyoon Jung
    • 2
  • Hansung Baek
    • 2
  • Jinwoo Lee
    • 3
  • Moon-Seok Choi
    • 4
  • Myoung-Gyu Lee
    • 5
    Email author
  1. 1.Advanced Technology Strategy Team, Ssangyong Motor Co.GyeonggiKorea
  2. 2.Q&C TECH, #A-823SeoulKorea
  3. 3.Materials Deformation DepartmentKorea Institute of Materials ScienceGyeongnamKorea
  4. 4.Innovative Engineering Team, Eum CreativeBusanKorea
  5. 5.Department of Materials Science and Engineering & RIAMSeoul National UniversitySeoulKorea

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