In this paper, quasi-statical boundary contact problems of couple-stress
viscoelasticity for inhomogeneous anisotropic bodies with regard to friction are investigated.
We prove the uniqueness theorem of weak solutions
using the corresponding Green’s formulas and positive definiteness of the potential energy.
To analyze the existence of solutions, we equivalently reduce the problem
under consideration to a spatial variational inequality.
We consider a special parameter-dependent regularization of this variational inequality
which is equivalent to the relevant regularized variational equation
depending on a real parameter, and study its solvability by the Galerkin approximate method.
Some a priori estimates for solutions of the regularized variational
equation are established and with the help of an appropriate
limiting procedure, the existence theorem for the original
contact problem with friction is proved.