Numerische Mathematik

, Volume 53, Issue 5, pp 513–538

A family of mixed finite elements for the elasticity problem

  • Rolf Stenberg
Article

DOI: 10.1007/BF01397550

Cite this article as:
Stenberg, R. Numer. Math. (1988) 53: 513. doi:10.1007/BF01397550

Summary

A new mixed finite element formulation for the equations of linear elasticity is considered. In the formulation the variables approximated are the displacement, the unsymmetric stress tensor and the rotation. The rotation act as a Lagrange multiplier introduced in order to enforce the symmetry of the stress tensor. Based on this formulation a new family of both two-and three-dimensional mixed methods is defined. Optimal error estimates, which are valid uniformly with respect to the Poisson ratio, are derived. Finally, a new postprocessing scheme for improving the displacement is introduced and analyzed.

Subject Classifications

AMS(MOS): 65 N 30CR: G 1.8

Copyright information

© Springer-Verlag 1988

Authors and Affiliations

  • Rolf Stenberg
    • 1
  1. 1.Institute of MathematicsHelsinki University of TechnologyEspooFinland