Probing Weak Forces in Granular Media through Nonlinear Dynamic Dilatancy:

Experiments with acoustic waves guided along the mechanically free surface of an unconsolidated granular packed structure provide information on the elasticity of granular media

In our numerical experiments, we can check these corre- lations as a function of j in the complementary network to the j-network. At large values of j, say j. 2)F*, strong contacts

For all times and slopes, the maximum thickness is higher (smaller) for initially dense (loose) packing than without dilatancy (K = 0). These results are in very good agreement

As a conclusion, at low shearing rate, the friction co- efficient µ of dense and immersed granular materials de- pends neither on the grain size nor on the viscosity of the

To summarize, the new instability presented in this paper leads to a vortices formation during compaction of anisotropic granular media at relatively low tapping intensity. Below

In [17], it is stated that if the initial random variable is symmetrical, then the limiting probability is the unique symmetrical invariant probability.. Furthermore, if the

on the important observation that granular materials do not conserve energy while the entropy S is well defined they proposed to consider the volume V to replace the internal energy

However the way the material reaches the "critical" state depends on the initial density.. ~ Three typical results obtained with a triaxial cell on the same sand compacted