Stress Force-displacement distributions and percolation properties in simulated 2-D grain packings

A.M. VIDALES, I. IPPOLITO AND C. MOUKARZEL

PHYSICA A - STATISTICAL AND THEORETICAL PHYSICS

Año: 2003 vol. 325 p. 297 - 318

0378-4371

The 0rst part of this paper studies the behavior of contact force distributions and displacementdistributions in isostatic 2-D arrays of polydispersed grains as a function of force strengthand displacement strength, respectively. The array is built by pouring disks, one by one, intoa rectangular die. After the array is ready, force and displacement measurements are performedon it. We also introduce a relaxation procedure (rearrangements of disks) in order to study thebehavior of the corresponding distributions as a function of the number of relaxations performedon the system.In the secondpart, we characterize the percolation of small particles through this 2-D packingsas a function of the polydispersivity of the disks. We analyze both trapping and non-trappingregimes. Characteristic features of these packings are discussed.