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Numerical Simulation of Forming Limit Test for AZ31 at 200°C

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Abstract:

This work is concerned with numerical analyses of the forming behavior of magnesium at elevated temperature. For that purpose, a thermodynamically consistent, rate-dependent, finite-strain elasto-plastic constitutive model is presented. This model captures the stress differential effect as well as the anisotropy of magnesium. Furthermore, the change in shape of the yield locus (distortional hardening) is also taken into account. This constitutive law, together with its parameter calibration based on uni-axial tensile tests, is finally combined with the localization criterion originally proposed by Marciniak and Kuczynski and applied to the simulation of forming limit test. Comparisons to experiments show the excellent predictive capabilities of the model.

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Periodical:

Key Engineering Materials (Volume 473)

Pages:

468-473

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.473.468

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Online since:

March 2011

Authors:

M. Nebebe, Jan Bohlen, Dirk Steglich, Jörn Mosler

Keywords:

Constitutive Model, Mg Alloy, Sheet Forming Limit

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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