Mean stress in a granular medium in dynamics |
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Authors: | J r me Fortin, Olivier Millet,G ry de Saxc |
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Affiliation: | a Laboratoire de Mécanique et CAO, Université de Picardie Jules Verne, IUT, 48 rue d'Ostende, 02100, Saint-Quentin, France;b Laboratoire de Mécanique de Lille, URA CNRS 1441––Université de Lille-I, Bd. Paul Langevin, 59655, Villeneuve d'Ascq cedex, France |
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Abstract: | In this paper we propose to construct a mean stress tensor for a granular medium, valid in static and in dynamics, which takes into account the contact reactions and the body forces acting at the grain level. A simple analytical example shows that taking account of inertia forces is essential to insure the symmetry of the mean stress tensor in dynamics. Finally, numerical simulations illustrating this definition of the mean stress tensor are presented for a granular medium ensiled. |
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Keywords: | Granular medium Mean stress Non-smooth contact dynamics |
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