Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Prediction of Springback by Using Constitutive Equations of Mg Alloy Sheets

마그네슘 합금 구성식을 이용한 스프링백 예측

  • 이명규 (한국기계연구원 부설 재료연구소) ;
  • 정관수 (서울대학교 재료공학부) ;
  • 김성준 (한국기계연구원 부설 재료연구소) ;
  • 김헌영 (강원대학교 기계 메카드로닉스 공학부)
  • Published : 2008.04.01
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Abstract

Unique constitutive behavior of magnesium alloys as one of hexagonal close packed(hcp) metals has been implemented into the commercial finite element program ABAQUS. The constitutive equations can represent asymmetry in tension-compression yield stresses and flow curves. For the verification purpose, the springback of AZ31B magnesium alloy sheet was measured using the unconstrained cylindrical bending test proposed in Numisheet'2002 benchmark committee. Besides the developed constitutive models, the isotropic models based on tensile and compressive properties were also considered for comparison purpose. The predicted results by the finite element analysis and corresponding experiments showed enhanced prediction capability in springback analysis.

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References

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