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- W3011646869 abstract "Granular packings display the remarkable phenomenon of dilatancy [1], wherein their volume increases upon shear deformation. Conventional wisdom and previous results suggest that dilatancy, as also the related phenomenon of shear-induced jamming, requires frictional interactions [2, 3]. Here, we investigate the occurrence of dilatancy and shear jamming in frictionless packings. We show that the existence of isotropic jamming densities {phi}j above the minimal density, the J-point density {phi}J [4, 5], leads both to the emergence of shear-induced jamming and dilatancy. Packings at {phi}J form a significant threshold state into which systems evolve in the limit of vanishing pressure under constant pressure shear, irrespective of the initial jamming density {phi}j. While packings for different {phi}j display equivalent scaling properties under compression [6], they exhibit striking differences in rheological behaviour under shear. The yield stress under constant volume shear increases discontinuously with density when {phi}j > {phi}J, contrary to the continuous behavior in generic packings that jam at {phi}J [4, 7]." @default.
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- W3011646869 date "2020-03-19" @default.
- W3011646869 modified "2023-10-16" @default.
- W3011646869 title "Is friction essential for dilatancy and shear jamming in granular matter" @default.
- W3011646869 hasPublicationYear "2020" @default.
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