Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: L'approche energetique en mecanique des materiaux granulaires   This communication establishes first, that basis of discontinuous granular
materials mechanics, are the explicit result of a new approach of the physics
of energy dissipation by friction, and second, that these mechanics of
discontinua, transposed to the equivalent continuous media, as used in
geomechanics, is directly responsible for a large set of practical properties
of these materials, part of the fundamentals of Soil Mechanics. These physics
of energy dissipation are developped on the original concept of energy rate
tensor of internal actions.

25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
2
The categories of this paper are: math
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin