Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constitutive Relations of Jammed Frictionless Granular Materials under
  Oscillatory Shear   We numerically investigate the rheological properties of jammed frictionless
granular materials under an oscillatory shear in terms of our simulation of the
distinct element method. It is demonstrated that the constitutive relation
between the shear stress and the shear strain of grains strongly depends on the
amplitude and the frequency of the oscillatory shear. For a small amplitude
region, the granular material behaves as a visco-elastic material characterized
by the Kelvin-Voigt model, while it behaves as a yield stress liquid for a
large amplitude region. We find that the rheology of grains under the large
amplitude oscillatory shear can be described by a phenomenological constitutive
model.

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The categories of this paper are: chem-ph
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The categories of this paper are: econ
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The categories of this paper are: nlin
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The categories of this paper are: q-bio
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The categories of this paper are: nucl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: stat
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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: cmp-lg
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-th
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The categories of this paper are: hep-ex
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-ph