| Issue |
EPL
Volume 78, Number 4, May 2007
|
|
|---|---|---|
| Article Number | 44004 | |
| Number of page(s) | 4 | |
| Section | Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics | |
| DOI | https://doi.org/10.1209/0295-5075/78/44004 | |
| Published online | 10 May 2007 | |
Phase transition in a static granular system
1
Physics Department and Center for Nonlinear Dynamics, University of Texas at Austin - Austin, TX 78712, USA
2
Mathematics Department, University of Texas at Austin - Austin, TX 78712, USA
Corresponding authors: schroeter@chaos.utexas.edu radin@math.utexas.edu
Received:
3
February
2007
Accepted:
11
April
2007
We find that a column of glass beads exhibits a well-defined transition between two phases that differ in their resistance to shear. Pulses of fluidization are used to prepare static sedimented states with well-defined particle volume fractions 
in the range 0.57
0.63. The resistance to shear is determined by slowly inserting a rod into the column of beads. Force measurements and bed height measurements both indicate that the transition occurs at 
for a range of speeds of the rod.
PACS: 45.70.Cc – Static sandpiles; granular compaction / 81.05.Rm – Porous materials; granular materials / 45.70.-n – Granular systems
© Europhysics Letters Association, 2007
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