CNCS Seminar
Tuesday, November 13, 2018, 3:00pm, 119 Physics
Peter Morse (Syracuse University, Physics)
Generic failure in granular packings: finding the relationship between shear and random forces
Abstract:- Under shear, a jammed packing of particles will break in
characteristic ways and transition between mechanically stable states. One
can then ask whether the signatures of failure are specific to shear, or
whether they are the same in more generic perturbations. Interestingly,
recent mean-field calculations suggest that in infinite dimensions, the
response of a system to global shear and random forces may be equivalent.
Whether or not this is true in 2D or 3D systems remains an open question.
Therefore, I've developed a method for driving 2D jammed packings of disks
by quasti-static persistent random forces to demonstrate that the response
is similar to what is observed in athermal quasi-static shear simulations. I
will also comment on how we expect the similarities to break in finite
dimensions and what these results might imply for active matter systems. [video]
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