Mechanichal Behavior of a Noncohesive Packing at Small Deformations: Deviation From Continuum Elasticity.

Amar El Hadji Bouya (1) , Didier Clamond (2) , Nathalie Fraysse (1) , Jean Rajchenbach (1)

1 LPMC - Laboratoire de physique de la matière condensée
2 JAD - Laboratoire Jean Alexandre Dieudonné

In order to specify the mechanical behavior of grain piles, we investigate the response of a non-cohesive bidimensional packing of cylinders submitted to a point load. By means of image processing, we have an accurate access to the individual grain displacements in the reversible regime. The measured displacement field deviates unambiguously from the predictions of Continuum Elasticity. The data reveal a partial agreement with the diffusive models of Harr (1966) or of Coppersmith et al. (1996).

Mots clés: Mechanics; Granular Materials; Statics; Constitutive relation

Domaines: Autre [cond-mat.other]

Amar El Hadji Bouya, Didier Clamond, Nathalie Fraysse, Jean Rajchenbach. Mechanichal Behavior of a Noncohesive Packing at Small Deformations: Deviation From Continuum Elasticity.. POWDERS AND GRAINS 2009, Jul 2009, Golden, United States. pp.244-247, ⟨10.1063/1.3179903⟩. ⟨hal-00439856⟩