Revisiting the Deshpande-Fleck Foam Model

Abstract:

The self-similar isotropic hardening model developed by Deshpande and Fleck has been widely used. An important issue in this model is to determine the value of ellipticity. The ellipticity was treated as a constant in the subsequent yield, but different values were suggested in the literature. In this paper a cell-based finite element model based on the 3D Voronoi technique is used to verify the Deshpande-Fleck foam model. It is found that the ellipticity determined from uniaxial and hydrostatic compressions varies with the equivalent plastic strain.

• Periodical: Key Engineering Materials (Volume 803)
• Pages: 134-139
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.803.134
• Online since: May 2019
• Authors: Chang Feng Zhu, Zhi Jun Zheng*, Shi Long Wang, Kai Zhao, Ji Lin Yu
• Keywords: Constitutive Relation, Ellipticity, Finite Element Analysis, Metal Foam

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