  This paper presents an application of Canonical duality theory to the
solution of contact problems with Coulomb friction. The contact problem is
formulated as a quasi-variational inequality which solution is found by solving
its Karush-Kunt-Tucker system of equations. The complementarity conditions are
reformulated by using the Fischer-Burmeister complementarity function,
obtaining a non-convex global optimization problem. Then canonical duality
theory is applied to reformulate the non-convex global optimization problem and
define its optimality conditions, finding a solution of the original
quasi-variational inequality. We also propose a methodology for finding the
solutions of the new formulation, and report the results on well known
instances from literature.
