Response of a noncohesive packing of grains to a localized force: Deviation from continuum elasticity | Zendy

El Hadji Bouya Amar | Zendy; Didier Clamond | Zendy; Nathalie Fraysse | Zendy; Jean Rajchenbach | Zendy

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Response of a noncohesive packing of grains to a localized force: Deviation from continuum elasticity

Author(s) -

El Hadji Bouya Amar,

Didier Clamond,

Nathalie Fraysse,

Jean Rajchenbach

Publication year - 2011

Publication title -

physical review e

Language(s) - English

Resource type - Journals

eISSN - 1550-2376

pISSN - 1539-3755

DOI - 10.1103/physreve.83.021304

Subject(s) - elasticity (physics) , geotechnical engineering , materials science , deformation (meteorology) , linear elasticity , displacement (psychology) , displacement field , mechanics , physics , geology , composite material , thermodynamics , finite element method , psychology , psychotherapist

International audienceIn order to characterize the mechanical behavior of grain piles, we investigate the response of a non-cohesive two-dimensional packing of cylinders submitted to a localized force. By means of image processing, we obtain an accurate measurement of the individual grain displacements in the reversible regime of deformation. The measured displacement field deviates unambiguously from the predictionsof linear elasticity and of other theoretical descriptions commonly used to model the behavior of cohesionless soils in civil engineering or in soil mechanics. Surprisingly, the analysis of the deformation field reveals a tendency to localization in the reversible regime

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