# American Institute of Mathematical Sciences

December  2013, 6(6): 1587-1598. doi: 10.3934/dcdss.2013.6.1587

## Dual formulation of a viscoplastic contact problem with unilateral constraint

 1 Departement of Mathematics, University of Craiov, A.I. Cuza Street 13, 200585, Craiova 2 Laboratoire de Mathématiques et Physique pour les Systèmes, Université de Perpignan, 52 Avenue Paul Alduy, 66860 Perpignan

Received  June 2012 Revised  September 2012 Published  April 2013

We consider a mathematical model which describes the contact between a viscoplastic body and an obstacle, the so-called foundation. The process is quasistatic, the contact is frictionless and is modelled with unilateral constraint. We derive a variational formulation of the model which leads to a history-dependent quasivariational inequality for stress field, associated to a time-dependent convex. Then we prove the unique weak solvability of the model. The proof is based on an abstract existence and uniqueness result obtained in [11].
Citation: Andaluzia Matei, Mircea Sofonea. Dual formulation of a viscoplastic contact problem with unilateral constraint. Discrete & Continuous Dynamical Systems - S, 2013, 6 (6) : 1587-1598. doi: 10.3934/dcdss.2013.6.1587
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##### References:
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