Modeling Constitutive Behavior of Mg Alloy Sheets for the Prediction of Sheet Springback

마그네슘 합금 판재의 구성식 개발: 스프링백에의 응용

  • 이명규 (한국기계연구원 부설 재료연구소) ;
  • 김성준 (한국기계연구원 부설 재료연구소) ;
  • 김헌영 (강원대학교 기계 메카트로닉스 공학부)
  • Published : 2007.10.11

Abstract

Unusual mechanical constitutive behavior of magnesium alloy sheets has been implemented into the finite element program ABAQUS via user material subroutine. For the verification purpose, the springback of AZ31B magnesium alloy sheet was measured using the unconstrained cylindrical bending test of Numisheet'2002. In addition to the developed constitutive models, the other two models based on isotropic constitutive equations with tensile and compressive properties were also considered. Preliminary comparisons have been made between simulated results by the finite element analysis and corresponding experiments and the newly proposed model showed enhanced prediction capability in springback prediction.

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