Frontiers of Structural and Civil Engineering
>> 2013,
Volume 7,
Issue 3
doi:
10.1007/s11709-013-0213-y
RESEARCH ARTICLE
Two-scale modeling of granular materials: A FEM-FEM approach
Building Engineering Department, College of Civil Engineering, Tongji University, Shanghai 200092, China
Available online: 2013-09-05
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Abstract
In the present paper, a homogenization-based two-scale FEM-FEM model is developed to simulate compactions of visco-plastic granular assemblies. The granular structure consisting of two-dimensional grains is modeled by the microscopic finite element method at the small-scale level, and the homogenized viscous assembly is analyzed by the macroscopic finite element method at large-scale level. The link between scales is made using a computational homogenization method. The two-scale FEM-FEM model is developed in which each particle is treated individually with the appropriate constitutive relations obtained from a representative volume element, kinematic conditions, contact constraints, and elimination of overlap satisfied for every particle. The method could be used in a variety of problems that can be represented using granular media.
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