Simple models for granular force networks

Details Simple models for granular force networks Simple models for granular force networks

2006-03-11

arxiv.org/abs/cond-mat/0603314v4

Physics

Condensed Matter

Soft Condensed Matter

10 pages, 18 figures. Revised version

Scientific paper

A remarkable feature of static granular matter is the distribution of force along intricate networks. Even regular inter-particle contact networks produce wildly inhomogeneous force networks where certain "chains" of particles carry forces far larger than the mean. In this paper, we briefly review past theoretical approaches to understanding the geometry of force networks. We then investigate the structure of experimentally-obtained granular force networks using a simple algorithm to obtain corresponding graphs. We compare our observations with the results of geometric models, including random bond percolation, which show similar spatial distributions without enforcing vector force balance. Our findings suggest that some aspects of the mean geometry of granular force networks may be captured by these simple descriptions.

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