Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tensile properties of all-polymeric syntactic foam composites:
  experimental characterization and mathematical modelling   All-polymer syntactic foams are studied under large strain cyclic and
monotonic tensile loading in order to reveal their tensile stress-strain
behaviour, recoverability, tensile strength, and elongation at break. The
syntactic foam under study here consists of hollow thermoplastic microspheres
(HTMs) of two distinct grades (551 and 920), with distributions of mean-wall
thicknesses and diameters, embedded inside a polyurethane matrix in various
volume fractions. Cyclic loading-unloading curves are recorded, revealing the
level of viscoelasticity exhibited by the materials (which becomes a stronger
effect with increasing volume fractions of HTMs) and indicating the level of
repeatability of loading under large strain. Samples are also subjected to
monotonic tensile loading in order to study their elongation at break. Higher
volume fractions of HTMs increase the stiffness of the material and whilst it
is observed that the materials are highly elastic over a wide range of tensile
strains, damage arises at lower levels of strain for more highly filled
materials. The HTM syntactic foams thus exhibit lower breaking strains compared
to the neat matrix, which is attributed to matrix-microsphere interfacial
debonding. Furthermore, by employing optimization techniques, linear elastic
properties of the microspheres and an average shell thickness of the 551 grade
are inferred by comparing experimental results to predictions from the
Generalized Self-Consistent Method, incorporating polydispersity data on the
size distribution of the microspheres. These results complement previous work
which involved direct experimental measurements of the 920 grade shell
thickness. Results also indicate that the characterization of microsphere
properties is not critically dependent on access to high resolution microsphere
diameter distribution data, provided that an accurate representative mean
diameter is known.

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The categories of this paper are: hep-lat
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: chao-dyn
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The categories of this paper are: adap-org
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The categories of this paper are: gr-qc
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The categories of this paper are: quant-ph
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The categories of this paper are: math-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-ex
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The categories of this paper are: eess
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The categories of this paper are: funct-an
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The categories of this paper are: chem-ph