PREDICTING SAND BEHAVIOUR USING A STATE PARAMETER MODEL

Abstract

In this paper a comparison between predicted and

experimental stress-strain behavior and

volumetric strains of sand are studied using a

simple constitutive model. The model used a state

parameter, that combines the influence of density

and stress level with reference to a steady state; a

hyperbolic hardening rule for representing the

global stress-strain behavior and fina/~v a link

between volumetric and deviatory plastic strain

increments through a simple militancy rule.

The calibration and the comparison of the

simulations with experimental results show that the

model is sufficient to reproduce with a ve(V good

accuracy the drained behaviour of sand over a

wide range of density and confining pressure.

using simple variations o.fmodel constants