Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Experimental and numerical study of the effect of surface patterning on
  the frictional properties of polymer surfaces   We describe benchmark experiments to evaluate the frictional properties of
laser patterned low-density polyethylene as a function of sliding velocity,
normal force and humidity. The pattern is a square lattice of square cavities
with sub-mm spacing. We find that dynamic friction decreases compared to
non-patterned surfaces, since stress concentrations lead to anticipated
detachment, and that stick-slip behavior is also affected. Friction increases
with humidity, and the onset of stick-slip events occurs in the high humidity
regime. Experimental results are compared with numerical simulations of a
simplified 2-D spring-block model. A good qualitative agreement can be obtained
by introducing a deviation from the linear behavior of the Amontons-Coulomb law
with the load, due to a saturation in the effective contact area with pressure.
This also leads also to the improvement of the quantitative results of the
spring-block model by reducing the discrepancy with the experimental results,
indicating the robustness of the adopted simplified approach, which could be
adopted to design patterned surfaces with controlled friction properties.

0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys