Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dilatancy and Friction in sheared granular media   We introduce a simple model to describe the frictional properties of granular
media under shear. We model the friction force in term of the horizontal
velocity v and the vertical position z of the slider, interpreting z as a
constitutive variable characterizing the contact. Dilatancy is shown to play an
essential role in the dynamic, inducing a stick-slip instability at low
velocity. We compute the phase diagram, analyze numerically the model for a
wide range of parameters and compare our results with experiments on dry and
wet granular media, obtaining a good agreement. In particular, we reproduce the
hysteretic velocity dependence of the frictional force.

30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ