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Published in:
2017 | OriginalPaper | Chapter
Instability Analysis of Granular Media via a Purely Micromechanical Constitutive Model
Authors : Mehdi Pouragha, Richard Wan, Xu Gong
Published in: Bifurcation and Degradation of Geomaterials with Engineering Applications
Publisher: Springer International Publishing
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Abstract
In this paper, we develop a rate independent, incrementally linear constitutive model for 2D granular materials within a robust multiscale framework where micromechanical interactions and microstructural rearrangements between particles are being described statistically. The model when implemented into a finite element code allows us to explore the different microscopic states both inside and outside of the strain localization zone that develops during shearing in a biaxial test. A major finding is the discovery of similarities in microstructural characteristics inside a shear band during localized failure and critical state in diffuse failure.