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The basic aim of this work is to present a method to treat structural mechanics problems dealing with tridimensional contact and large elastic deformations. The formulation presented in this article offers a B-Spline based discretization for the contact surface, which solves the continuity problems presented by the classic Lagrangian contact element formulation. A B-Spline surface is utilized to discretize the contact surface, and the BSpline basis functions are used to distribute the contact forces between the contact surfaces nodes. The finite element utilized is an 8-node hexahedron, and the formulation is continuum mechanics based, written in the current configuration, utilizing a neo-Hookean material model. The contact restrictions are enforced by the augmented Lagrangian method. Key-words Contact mechanics, B-Spline, Surface smoothing, Augmented Lagrangian method, Friction.

Numerical modeling of contact problems with the finite element method utilizing a B-Spline surface for contact surface smoothing