Internal states of model isotropic granular packings. I. Assembling process, geometry and contact networks

Details Internal states of model isotropic granular packings. I. Assembling process, geometry and contact networks Internal states of model isotropic granular packings. I. Assembling process, geometry and contact networks

2007-05-22

arxiv.org/abs/0705.3194v3

Physical Review E: Statistical, Nonlinear, and Soft Matter Physics 76, 6 (2007) 061302

Physics

Condensed Matter

Disordered Systems and Neural Networks

29 pages. Published in Physical Review E

Scientific paper

10.1103/PhysRevE.76.061302

This is the first paper of a series of three, reporting on numerical simulation studies of geometric and mechanical properties of static assemblies of spherical beads under an isotropic pressure. Frictionless systems assemble in the unique random close packing (RCP) state in the low pressure limit if the compression process is fast enough, slower processes inducing traces of crystallization, and exhibit specific properties directly related to isostaticity of the force-carrying structure. The different structures of frictional packings assembled by various methods cannot be classified by the sole density. While lubricated systems approach RCP densities and coordination number z^*~=6 on the backbone in the rigid limit, an idealized "vibration" procedure results in equally dense configurations with z^*~=4.5. Near neighbor correlations on various scales are computed and compared to available laboratory data, although z^* values remain experimentally inaccessible. Low coordination packings have many rattlers (more than 10% of the grains carry no force), which should be accounted for on studying position correlations, and a small proportion of harmless "floppy modes" associated with divalent grains. Frictional packings, however slowly assembled under low pressure, retain a finite level of force indeterminacy, except in the limit of infinite friction.

Affiliated with

Also associated with

No associations

Rating

Internal states of model isotropic granular packings. I. Assembling process, geometry and contact networks does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Internal states of model isotropic granular packings. I. Assembling process, geometry and contact networks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Internal states of model isotropic granular packings. I. Assembling process, geometry and contact networks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-416239