The nature of quasistatic deformation in granular materials

Jean-Noël Roux (1, 2)

1 LMSGC - Laboratoire des matériaux et structures du génie civil
2 navier umr 8205 - Laboratoire Navier

Strain in granular materials in quasistatic conditions under varying stress originate in (I) contact deformation and (II) rearrangements of the contact network. Depending on sample history and applied load, either mechanism might dominate. One may thus define rheological regimes I and II accordingly. Their properties are presented and illustrated here with discrete numerical simulation results on sphere packings. Understanding the microscopic physical origin of strain enables one to clarify such issues as the existence of macroscopic elasticity, the approach to stress-strain relations in the large system limit and the sensitivity to noise.

Mots clés: matériaux granulaires; déformation; simulation discrète

Domaines: Mécanique des matériaux [physics.class-ph]; Mécanique des matériaux [physics.class-ph]

Jean-Noël Roux. The nature of quasistatic deformation in granular materials. Powders and Grains 2005, Jul 2005, Stuttgart, Germany. pp. 261--265. ⟨hal-00353569⟩