ar X iv : 1 50 6 . 02 71 4 v 2 [ co nd - m at . s of t ] 2 0 Ju n 20 15 Free volume under shear
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چکیده
Using an athermal quasistatic simulation protocol, we study the distribution of free volumes in sheared hard-particle packings close to, but below, the random-close packing threshold. We show that under shear, and independent of volume fraction, the free volumes develop features similar to close-packed systems – particles self-organize in a manner as to mimick the isotropically jammed state. We compare athermally sheared packings with thermalized packings and show that thermalization leads to an erasure of these structural features. The temporal evolution, in particular the opening-up and the closing of free-volume patches is associated with the singleparticle dynamics, showing a crossover from ballistic to diffusive behavior.
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تاریخ انتشار 2015