Frictional indeterminancy of forces in hard-disk packings

被引：4
|
作者：
Unger, T [1 ]
Kertész, J [1 ]
机构：
[1] Budapest Univ Technol & Econ, Dept Theoret Phys, H-1111 Budapest, Hungary
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2003年 / 17卷 / 29期
关键词：
friction; isostatic; hyperstatic;
D O I：
10.1142/S021797920302329X
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We study the statical indeterminacy of contact, forces in 2D random frictional packings of perfectly rigid disks. Based on contact dynamics simulations we perform a random walk in the force space in order to explore the equilibrium force-states for a fixed packing structure. Our measurement is in agreement with the isostaticity of frictionless hard particles, in that case forces are fully determined. For non-zeio friction coefficient the problem gets undetermined, the possible force fluctuations. are growing with increasing friction up to a maximum at friction coefficient around 0.1. Further increase of friction reduces the force fluctuations on the average.
引用
收藏
页码：5623 / 5630
页数：8
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