Abstract
We consider a mathematical model which describes the sliding frictional contact between a viscoplastic body and an obstacle, the so-called foundation. The process is quasistatic, the material’s behavior is described with a viscoplastic constitutive law with internal state variable and the contact is modelled with normal compliance and unilateral constraint. The wear of the contact surfaces is taken into account, and is modelled with a version of Archard’s law. We derive a mixed variational formulation of the problem which involve implicit history-dependent operators. Then, we prove the unique weak solvability of the contact model. The proof is based on a fixed point argument proved in Sofonea et al. (Commun. Pure Appl. Anal. 7:645–658, 2008), combined with a recent abstract existence and uniqueness result for mixed variational problems, obtained in Sofonea and Matei (J. Glob. Optim. 61:591–614, 2014).
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Acknowledgements
The work of the authors has been partially supported by project LEA Math Mode 2014/2015. The work of the second author has been partially supported by project POSDRU/159/1.5/S/132400: Young successful researchers-professional development in an international and interdisciplinary environment at Babeş-Bolyai University.
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Sofonea, M., Pătrulescu, F. & Ramadan, A. A Mixed Variational Formulation of a Contact Problem with Wear. Acta Appl Math 153, 125–146 (2018). https://doi.org/10.1007/s10440-017-0123-4
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DOI: https://doi.org/10.1007/s10440-017-0123-4
Keywords
- viscoplastic material
- Frictional contact
- Normal compliance
- Unilateral constraint
- Wear
- Mixed variational formulation
- History-dependent operator
- Weak solution