Experimental
Test of the "Isotropic"
Approximation for Granular Materials using p=constant Compression
Abstract: Experimental data from axially symmetric
compression test at constant mean pressure p=(s1+s2+s3)/3 on
Hostun sand from Bouvard experiments are used to study the validity of an
"isotropic" modelling as a function of 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
poudres &
grains 12 (1), 11-16 (février 2001)