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Mean stress in a granular medium in dynamics

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2002
auteur(s) Fortin Jérôme; Millet Olivier; De Saxce Géry
journal Mechanics Research Communication
volume (numéro) 29 (4)
  
pages 235 – 240
résumé In this paper we propose to construct a mean stress tensor for a granular medium, valid in static and in dynamics, wich 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.
mots clés Granular medium; Mean stress; Non-smooth contact dynamics
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