Jamming phase diagram for frictional particles

被引：71
作者：
Ciamarra, Massimo Pica [1 ]
Pastore, Raffaele [1 ]
Nicodemi, Mario [1 ,2 ]
Coniglio, Antonio [1 ,2 ]
机构：
[1] Univ Naples Federico II, Dipartimento Sci Fis, CNR SPIN, I-80126 Naples, Italy
[2] Ist Nazl Fis Nucl, I-80126 Naples, Italy
来源：
PHYSICAL REVIEW E | 2011年 / 84卷 / 04期
关键词：
STRESS FLUCTUATIONS; GRANULAR-MATERIALS; HARD-SPHERES; PACKING; SHEAR;
D O I：
10.1103/PhysRevE.84.041308
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
We investigate the jamming transition of frictional particulate systems via discrete element simulations, reporting the existence of new regimes, which are conveniently described in a jamming phase diagram with axes density, shear stress, and friction coefficient. The resulting jammed states are characterized by different mechanical and structural properties and appear not to be "fragile" as speculated. In particular, we find a regime, characterized by extremely long processes, with a diverging time scale, whereby a suspension first flows but then suddenly jams. We link this sudden jamming transition to the presence of impeded dilatancy.
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页数：10
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