Abstract
In this paper, we apply EQ 1 rot nonconforming finite element to approximate Signorini problem. If the exact solution u ∈ H 5/2 (Ω), the error estimate of order O ( h ) about the broken energy norm is obtained for quadrilateral meshes satisfying regularity assumption and bi-section condition. Furthermore, the superconvergence results of order O ( h 3/2 ) are derived for rectangular meshes. Numerical results are presented to confirm the considered theory.
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