Microscopic Origin of Nonlocal Rheology in Dense Granular Materials

被引：27

作者：

Gaume, Johan ^{[1
,3
]}

Chambon, Guillaume ^{[2
]}

Naaim, Mohamed ^{[2
]}

机构：

[1] Ecole Polytech Fed Lausanne EPFL, CH-1015 Lausanne, Switzerland

[2] Univ Grenoble Alpes, INRAE, UR ETNA, F-38402 St Martin Dheres, France

[3] WSL Inst Snow & Avalanche Res SLF, Fluelastr 11, CH-7260 Davos, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2020年 / 125卷 / 18期

基金：

瑞士国家科学基金会;

关键词：

MODEL;

D O I：

10.1103/PhysRevLett.125.188001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the microscopic origin of nonlocality in dense granular media. Discrete element simulations reveal that macroscopic shear results from a balance between microscopic elementary rearrangements occurring in opposite directions. The effective macroscopic fluidity of the material is controlled by these velocity fluctuations, which are responsible for nonlocal effects in quasistatic regions. We define a new micromechanically based unified constitutive law describing both quasistatic and inertial regimes, valid for different system configurations.

引用

页数：5

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