2005/07/07 by P. Evesque
Physics and Astronomy · #cond-mat.soft
published as Poudres & Grains 12, 11-16, (2001), ISSN 1257-3957 · 6 pages + 1 page, 1 figure
arxiv created 2005/07/07 · arxiv updated 2009/12/01
Experimental data from axially symmetric compression test at constant mean pressure p on Hostun sand from Bouvard experiments are used to study the validity of an "isotropic" modelling as a function of the density .The isotropic assumption is found to be quite good for loose samples and/or in the range of large pressure. For smaller mean pressure, anisotropic response is observed at few percents of axial deformation. Relation with anisotropic distribution of local force is made. Pacs # : 5.40 ; 45.70 ; 62.20 ; 83.70.Fn