The shape of jamming arches in two-dimensional deposits of granular materials

Details The shape of jamming arches in two-dimensional deposits of granular materials The shape of jamming arches in two-dimensional deposits of granular materials

2010-05-28

arxiv.org/abs/1005.5246v2

Physics

Condensed Matter

Soft Condensed Matter

8 pages; submitted to Physical Review E

Scientific paper

We present experimental results on the shape of arches that block the outlet of a two dimensional silo. For a range of outlet sizes, we measure some properties of the arches such as the number of particles involved, the span, the aspect ratio, and the angles between mutually stabilizing particles. These measurements shed light on the role of frictional tangential forces in arching. In addition, we find that arches tend to adopt an aspect ratio (the quotient between height and half the span) close to one, suggesting an isotropic load. The comparison of the experimental results with data from numerical models of the arches formed in the bulk of a granular column reveals the similarities of both, as well as some limitations in the few existing models.

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