Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A finite element analysis of rolling of bilayer films to cylindrical and
  conical tubes   With recent developments in nanotechnology, self-assembled structures are
providing convenient, cheaper and more precise ways of manufacturing various
patterns and shapes with less complexity. Of these self-assembled structures,
rolled-up nano-tubes play a vital role in various aspects. The notion is, the
utilization of strain energy developed during epitaxial growth of a bilayer
thin film over a substrate, mediated by a sacrificial layer. While the
sacrificial layer is etched, the bilayer film is subjected to release its own
in-built strain energy in the out-of-plane direction (3D structure) due to a
bending stress induced by biaxial strain through the thickness, in the bilayer.
This paper proposes a new method of fabricating conical self-rolled assembly by
thickness and strain variations along the width of the bilayer and, cylindrical
structure of variable radius due to thickness and strain variations along the
length.

4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga