Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Steady state cyclic behaviour of a half-plane contact in partial slip
  subject to varying normal load, moment, shear load, and moderate differential
  bulk tension   A new solution for a general half-plane contact in the steady state is
presented. The contacting bodies are subject to a set of constant loads -
normal force, shear force and bulk tension parallel with the interface -
together with an oscillatory set of the same quantities. Partial slip
conditions are expected to ensue for a range of these quantities. In addition,
the line of action of the normal load component does not necessarily need to
pass the centre-line of the contact, thereby introducing a moment and asymmetry
in the contact extent. This advancement enables a mapping to be formalised
between the normal and tangential problem. An exact and easy to apply recipe is
defined.

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The categories of this paper are: nucl-th
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The categories of this paper are: econ
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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
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The categories of this paper are: physics
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The categories of this paper are: stat
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The categories of this paper are: q-bio
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The categories of this paper are: dg-ga
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The categories of this paper are: atom-ph
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The categories of this paper are: adap-org
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The categories of this paper are: supr-con
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The categories of this paper are: q-alg
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The categories of this paper are: comp-gas
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The categories of this paper are: chem-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: mtrl-th