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Jamming Transition In Non-Spherical Particle Systems: Pentagons Versus Disks, Y. Zhao, J. Barés, H. Zheng, Cacey Stevens Bester, Y. Xu, J. E. S. Socolar, R. P. Behringer
Jamming Transition In Non-Spherical Particle Systems: Pentagons Versus Disks, Y. Zhao, J. Barés, H. Zheng, Cacey Stevens Bester, Y. Xu, J. E. S. Socolar, R. P. Behringer
Physics & Astronomy Faculty Works
We investigate the jamming transition in a quasi-2D granular material composed of regular pentagons or disks subjected to quasistatic uniaxial compression. We report six major findings based on experiments with monodisperse photoelastic particles with static friction coefficient μ≈1. (1) For both pentagons and disks, the onset of rigidity occurs when the average coordination number of non-rattlers, Znr, reaches 3, and the dependence of Znr on the packing fraction ϕ changes again when Znr reaches 4. (2) Though the packing fractions ϕc1 and ϕc2 at these transitions differ from run to run, for both shapes the data from all runs with …