Fluage et rupture dans un matériau granulaire

Axelle Amon (1) , van Bau Nguyen (2) , Ary Bruand (3) , Jérôme Crassous (1) , Eric Clément (2)

1 IPR - Institut de Physique de Rennes
2 PMMH - Physique et mécanique des milieux hétérogenes (UMR 7636)
3 ISTO - Institut des Sciences de la Terre d'Orléans

We study experimentally the localization of deformation occuring at slow shear, in a 3D granular packing. We use an original method of measurement of deformation based on Diffusive Wave Spectroscopy. We evidence localized regions of strong deformations spanning a mesoscopic size of about 10 grains. We link the apparition rate of those spots to the concept of fluidity, recently used to describe the local and non-local rheology of soft glassy materials.

Domaines: Science des matériaux [cond-mat.mtrl-sci]; Matière Molle [cond-mat.soft]

Axelle Amon, van Bau Nguyen, Ary Bruand, Jérôme Crassous, Eric Clément. Fluage et rupture dans un matériau granulaire. 15ème Rencontre du Non-linéaire, Mar 2012, Paris, France. pp.19-24, 2012. ⟨hal-00936983⟩