Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Micromechanical approach for the analysis of wave propagation in
  particulate composites   Laser ultrasonic non-destructive testing is widely used for the inspection of
mechanical structures. This method uses the propagation of ultrasonic guided
waves (UGW) in the media. For this purpose, it has been demonstrated that the
addition of a thin composite layer between the laser source and the structure
for inspection is necessary. Consequently, this composite is an optoacoustic
transducer composed of an absorption material such as carbon for inclusions and
an expanding material such as an elastomer for the matrix. Thus, optimal
fabrication of this composite should enable the amplification of the signal for
inspection. Indeed, experimental research has demonstrated that variation in
the volume fraction of carbon inclusions, their shape, and the nature of the
matrix, affect the amplification of the signal directly. The aim of this study
is to analyse the wave propagation in particulate viscoelastic composites by a
dynamic self-consistent approach.

35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn