Superconvergence analysis of the stable conforming rectangular mixed finite elements for the linear elasticity problem

Abstract

In this paper, we consider the linear elasticity problem based on the Hellinger-Reissner variational principle. An Οh2) order superclose property for the stress and displacement and a global superconvergence result of the displacement are established by employing a Clement interpolation, an integral identity and appropriate postprocessing techniques. Copyright 2014 by AMSS, Chinese Academy of Sciences.