Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Understanding cooperative loading in carbon nanotube fibres through
  in-situ structural studies during stretching   Carbon nanotube (CNT) fibres are firmly established as a new high-performance
fibre, but their tensile mechanical properties remain a relatively small
fraction of those of the constituent CNTs. Clear structure-property relations
and accurate mechanical models are pressing requirements to bridge this gap. In
this work we analyse the structural evolution and molecular stress transfer in
CNT fibres by performing in-situ synchrotron wide- and small-angle X-ray
scattering and Raman spectroscopy during tensile deformation. The results show
that CNT fibres can be accurately described as network of bundles that slide
progressively according to the initial orientation distribution function of the
material following a Weibull distribution. This model decouples the effects of
CNT alignment and degree of cooperative loading, as demonstrated for fibres
produced at different draw ratios. It also helps explain the unusually high
toughness (fracture energy) of CNT fibres produced by the direct spinning
method, a key property for impact resistance in structural materials, for
example.

28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an