Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2007-09-20
J. Stat. Mech. (2006) 07010
Physics
Condensed Matter
Disordered Systems and Neural Networks
10 pages, 6 figures
Scientific paper
10.1088/1742-5468/2006/07/P07010
The topological structure resulting from the network of contacts between grains (\emph{contact network}) is studied for large samples of monosized spheres with densities (fraction of volume occupied by the spheres) ranging from 0.59 to 0.64. We retrieve the coordinates of each bead in the pack and we calculate the average coordination number by using three different methods. We show that, in the range of density investigated, the coordination number is larger than 4 and it increases with the packing fraction. At local level we also observe a positive correlation between local packing fraction and number of neighbors. We discover a dependence between the local densities of configurations with few neighbors in contact and the global sample-denities. This might indicate that local configurations with small number of neighbors are able to deform plastically when the sample is compactifying. PACS: 45.70.-n, Granular Systems; 45.70.Cc, Static sandpiles; Granular Compaction.
Aste Tomaso
Saadatfar Mohammad
Senden Tim J.
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