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Comportement d'interface des matériaux granulaires

Abstract : . In this thesis, we analyze the interface behavior of granular materials, and particularly the phenomenon of shear strain localization in the vicinity of a wall. Using an annular geometry with imposed shear velocity and confining pressure, we compare experimental and numerical approaches to describe this behavior. The experimental approach is composed of experiments with model materials in two annular simple shear devices (ACSA and mini-ACSA). We connect measurements of shear strain of the granular medium, obtained by correlation imaging velocimetry (ACSA) and by magnetic resonance imaging (mini-ACSA) to global measurements of the stress and volume variations. The numerical approach consists of two-dimensional discrete simulations (molecular dynamics). We study the influence of the geometry and the surface roughness on the behaviour of the granular interfaces. In simulation, we complete the study with the analysis of inertial effects.
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Submitted on : Monday, September 29, 2008 - 8:00:00 AM
Last modification on : Saturday, January 15, 2022 - 3:51:56 AM
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  • HAL Id : pastel-00004192, version 1


Georg Koval Junior. Comportement d'interface des matériaux granulaires. Sciences de l'ingénieur [physics]. Ecole des Ponts ParisTech, 2008. Français. ⟨pastel-00004192⟩



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