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Statistics of the contact network in frictional and frictionless granular packings
Simulated granular packings with different particle friction coefficient $\ensuremath{\mu}$ are examined. The distribution of the particle-particle and particle-wall normal and tangential contact forces $P(f)$ are computed and compared with existing experimental data. Here $f\ensuremath{\equiv}F/\overline{F}$ is the contact force F normalized by the average value $\overline{F}.$ $P(f)$ exhibits exponential-like decay at …