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Mixed finite element methods for unilateral problems: Convergence analysis and numerical studies. (English) Zbl 1013.74062
Summary: We propose and study different mixed variational methods in order to approximate with finite elements unilateral problems arising in contact mechanics. The discretized unilateral conditions at the candidate contact interface are expressed by using either continuous piecewise linear or piecewise constant Lagrange multipliers in the saddle-point formulation. A priori error estimates are established, and several numerical studies corresponding to different choices of discretized unilateral conditions are achieved.

##### MSC:
 74S05 Finite element methods applied to problems in solid mechanics 74M15 Contact in solid mechanics
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##### References:
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