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Physica A 339 (2004) 1623 www.elsevier.com/locate/physa

Summary: Physica A 339 (2004) 16­23
Investigating the geometrical structure of
disordered sphere packings
T. Aste, M. Saadatfar, A. Sakellariou, T.J. Senden
Department of Applied Mathematics, Research School of Physical Sciences and Engineering,
Australian National University, Canberra ACT 0200, Australia
Bead packs of up to 150,000 mono-sized spheres with packing densities ranging from 0.58 to
0.64 have been studied by means of X-ray computed tomography. These studies represent the
largest and the most accurate description of the structure of disordered packings at the grain-scale
ever attempted. We investigate the geometrical structure of such packings looking for signatures
of disorder. We discuss ways to characterize and classify these systems and the implications that
local geometry can have on densi˙cation dynamics.
c 2004 Elsevier B.V. All rights reserved.
PACS: 45.70.-n; 45.70.Cc; 45.70.Qj
Keywords: Sphere packing; Granular materials; Complex materials; Microtomography
1. Introduction
For several centuries, the structures generated by tightly packed mono-sized spheres
have been studied by scientists as model systems for understanding the emergence


Source: Aste, Tomaso - Department of Applied Mathematics, Australian National University


Collections: Physics