Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Wave steering effects in anisotropic composite structures: Direct
  calculation of the energy skew angle through a finite element scheme   A systematic expression quantifying the wave energy skewing phenomenon as a
function of the mechanical characteristics of a non-isotropic structure is
derived in this study. A structure of arbitrary anisotropy, layering and
geometric complexity is modelled through Finite Elements (FEs) coupled to a
periodic structure wave scheme. A generic approach for efficiently computing
the angular sensitivity of the wave slowness for each wave type, direction and
frequency is presented. The approach does not involve any finite
differentiation scheme and is therefore computationally efficient and not prone
to the associated numerical errors.

37
The categories of this paper are: supr-con
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol