Dual finite element method in friction problems

The application of the equilibrium model in terms of the finite element method to plane stress and plane strain problems is considered in the paper. The influence of friction of Coulomb type is taken into account. The problem is set in the form of quasi-variational inequality. The Airy stress function is used for calculation of the statically admissible solution. The iterative method of solving of the problem and some numerical results are presented in the paper.