Structure Formation and Force Networks in Shear Jammed Sphere Packings

by Prof. Srikanth Sastry (Jawaharlal Nehru Centre for Advanced Scientific Research,INDIA)

Thursday 6 Jul 2017, 15:00 → 17:00 Europe/Rome

Aula 3 (Dipartimento di Fisica - Ed. G.Marconi)

The jamming transition has been widely investigated with hard and soft sphere packings as model systems, both in the presence of friction and for frictionless spheres. Various geometric aspects of jammed packings have received considerable attention in the context of the jamming point for frictionless spheres. Less attention has been paid to geometric aspects associated with jamming that may arise at densities lower than the isotropic frictionless jamming or random close packing density. I will show that sheared steady state configurations of frictionless spheres, when friction is turned on, will jam with no structural reorganization. I will also show that rigidity percolation precedes the shear jamming transition, but the percolation of over-constrained regions coincides with shear jamming.