A Simple Incremental Modelling of Granular-Media Mechanics


P. Evesque: Lab MSSM, UMR 8579 CNRS, Ecole Centrale Paris, 92295 Châtenay-Malabry, France, evesque@mssmat.ecp.fr


Abstract: It is proposed a simple non linear incremental modelling of the compression of granular materials and powders. It describes the main features of undrained compression and of oedometric compression using the results of compression tests at constant s2=s3 . It  generalises the concept of characteristic state. It shows that trajectories arriving at a given critical state shall pertain to a single surface in the (v,q,p) space, which confirms the recent result demonstrating that Hvorslev's and Roscoe's surfaces are part of the same surface. Effects of induced anisotropy are discussed; comparison with classical camclay model is performed.


poudres & grains 9, 1-12 (15 novembre 1999)