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Volumn 70, Issue 1 1, 2004, Pages

Packing geometry and statistics of force networks in granular media

Author keywords

[No Author keywords available]

Indexed keywords

APPROXIMATION THEORY; COMPUTER SIMULATION; COOLING; FOAMS; GRANULAR MATERIALS; HIGH ENERGY PHYSICS; MATHEMATICAL MODELS; MOLECULAR DYNAMICS; NUMERICAL METHODS; PHOTOELASTICITY; PROBABILITY DENSITY FUNCTION; SENSORS; STATISTICAL METHODS;

EID: 42749100017     PISSN: 15393755     EISSN: None     Source Type: Journal    
DOI: 10.1103/PhysRevE.70.011301     Document Type: Article
Times cited : (26)

References (40)
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    • There is a slight difference between the packings of "soft" particles (deformation 0.1%) and "hard" particles (deformation 0.1%). The average coordination number of the hard particles is smaller than that of the soft particles, leading to a significant number of rattlers - i.e., particles that feel no force from above. Since the forces carrying these rattlers are of the order mg<(F), they show up as δ peaks at zero force (see also Sec. II B); besides these δ peaks, P(f) in both systems are virtually indistinguishable.
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    • note
    • I by a factor of more than 4. For simplicity we therefore have kept a "cutoff angle" of 0° in the bulk.
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    • The second moments are very sensitive to small changes in the distributions and hence form a good representation of the evolution of the entire distributions P(w) and P(f) as a function of depth. To see what the corresponding distributions look like, we refer to Figs. 2 and 5(a).
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    • note
    • This diffusion in correlation space should not be confused with the diffusion in real space due to a localized force on the top surface. In our case we have homogeneous initial conditions as all weights in the top layer are equal.


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