Abstract
Correlation of contact problems is discussed in a detailed manner with focus on spherical contact. The finite element method is used to determine appropriate stress quantities, representative stresses, aiming at a general description of contact quantities such as mean contact pressure, and the size of the contact area. It is shown that the mean contact pressure can be well described by a single master curve, while this is not so for the size of the contact area. The latter feature is explained partly by a pronounced effect from elastic deformation, but is also shown that large deformation effects can have a substantial influence on correlation attempts. The analysis is restricted to classical Mises elastoplasticity, but the results can also serve as a guideline for similar attempts when using more advanced constitutive modeling. An obvious application of the present results concerns material characterization by indentation testing.
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Olsson, E., Larsson, PL. On the Appropriate Use of Representative Stress Quantities at Correlation of Spherical Contact Problems. Tribol Lett 50, 221–232 (2013). https://doi.org/10.1007/s11249-013-0114-1
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DOI: https://doi.org/10.1007/s11249-013-0114-1