Effect of grains roughness on waves velocities in granular packings

Mohammad Sharifipour (1) , Christophe Dano (1)

1 GeM - Institut de Recherche en Génie Civil et Mécanique

The effect of particles roughness on wave velocities is investigated in granular materials using bender-extender elements. The roughness of the particles was modified by a chemical degradation process of initially smooth beads. Wave velocities were calculated along isotropic stress paths from 100 to 500 kN/m 2 in order to compare these experimental results to theoretical predictions by Hertz or previous results presented in the literature. Our results show a little effect of the surface roughness on the longitudinal wave velocities but a notable effect on the shear wave velocities.

Mots clés: elastic properties; glass beads; bender-extender elements; wave propagation; grains roughness; Hertz's theory

Domaines: Mécanique [physics.med-ph]; Matériaux

Mohammad Sharifipour, Christophe Dano. Effect of grains roughness on waves velocities in granular packings. 1st Euro-Mediterranean Symposium in Advances on Geomaterials and Structures, May 2006, Hammamet, Tunisia. ⟨hal-01008097⟩