Browse > Article
http://dx.doi.org/10.5228/KSPP.2007.16.4.234

Constitutive Modeling of AZ31B Magnesium Alloys  

Lee, M.G. (한국기계연구원 재료연구소)
Chung, K. (서울대학교 재료공학부)
Kim, H.Y. (강원대학교 기계.메카트로닉스 공학부)
Publication Information
Transactions of Materials Processing / v.16, no.4, 2007 , pp. 234-238 More about this Journal
Abstract
Magnesium alloy sheets in room temperature have unusual mechanical properties such as high in-plane anisotropy/asymmetry of yield stress and hardening behavior. In this paper, the continuum plasticity models considering the plastic behavior of AZ31B Mg alloy sheet were derived. A new hardening law based on modified two-surface model was developed to consider the general stress-strain response of metals including Bauschinger effect, transient behavior and the unusual asymmetry. Three deformation modes observed during the continuous tension/compression tests were mathematically formulated with simplified relations between the state of deformation and their histories. To include the anisotropy and asymmetry of the initial yield stress, the Drucker-Prager's pressure dependent yield surface was modified by adding anisotropic constants.
Keywords
AZ31B Magnesium Alloy Sheet; Anisotropy; Asymmetry; Two-surface Model; Bauschinger Effect; Transient Behavior; Modified Drucker-Prager Model;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 H. K. Kim, W. R. Lee, S. K. Hong, J. D. Kim, B. K. Han, 2006, Finite-Element Analysis of Warm Square Cup Deep Drawing Process of Magnesium Alloy AZ31 Sheet, Transactions of Materials Processing, Vol.15 No.3, p. 232   과학기술학회마을   DOI   ScienceOn
2 C. S. Roberts, 1960, Magnesium and its alloys, New York: John Wiley
3 X. Y. Lou, M. Li, R. K. Boger, S. R. Agnew, R. H. Wagoner, 2007, Hardening Evolution of AZ31B Mg Sheet, Int. J. Plast. Vol. 23, p. 44   DOI   ScienceOn
4 M. Lee, D. Kim, C. Kim, M. Wenner, R. H. Wagoner, K. Chung, A practical two-surface model and its application to springback prediction, Int. J. Plast. (in press)
5 J. Kim, M. G. Lee, H. Ryou, K. Chung, J. R. Youn, T. J. Kang, Development of nonlinear constitutive laws for anisotropic and asymmetric fiber reinforced composite Polymer Composites(accepted)
6 M. G. Lee, R. H. Wagoner, K. Chung, J. K. Lee, H. Y. Kim, Constitutive Modeling for Anisotropic / Asymmetric Hardening Behavior of Magnesium alloy sheets, 2007, Int. J. Plast.,(submirted)