Constitutive Modeling of Magnesium Alloys with Distortional Hardening

Abstract:

Anisotropic mechanical behavior is one of the key factors restricting the processing procedure of magnesium alloys. This pronounced anisotropy, however, cannot be characterized by classical isotropic or kinematic hardening due to the constant shape of yield surfaces during plastic deformation. Therefore, the shape evolution of yield surfaces, also known as distortional hardening is the main way to capture the anisotropic behavior. Based on elasto-plasticity theory at finite strain, constitutive model with distortional hardening for Mg alloys is proposed. The thermodynamical consistency is proved. The anisotropic mechanical behavior of AZ31 sheet is demonstrated after material parameters calibration.

• Periodical: Materials Science Forum (Volume 816)
• Pages: 393-398
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.816.393
• Online since: April 2015
• Authors: Bao Dong Shi*, Yan Peng, Fu Sheng Pan
• Keywords: Anisotropy, Distortional Hardening, Magnesium Alloys

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