Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Finite Element Method for Solving 2D Contact Problems with Coulomb
  Friction and Bilateral Constraints   Based on the plenty method, this paper describes a numerical method for 2D
non-smooth contact problems with Coulomb friction and bilateral constraints and
its application to the simulation of statics and dynamics for a frictional
translational joint. Comparison is made with results obtained using a finite
element program, ANSYS.

5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat