Residual-based a posteriori error analysis for symmetric mixed Arnold–Winther FEM

Carsten Carstensen, Dietmar Gallistl, J. Gedicke*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)
18 Downloads (Pure)

Abstract

This paper introduces an explicit residual-based a posteriori error analysis for the symmetric mixed finite element method in linear elasticity after Arnold–Winther with pointwise symmetric and 퐻(div)-conforming stress approximation. The residual-based a posteriori error estimator of this paper is reliable and efficient and truly explicit in that it solely depends on the symmetric stress and does neither need any additional information of some skew symmetric part of the gradient nor any efficient approximation thereof. Hence, it is straightforward to implement an adaptive mesh-refining algorithm. Numerical experiments verify the proven reliability and efficiency of the new a posteriori error estimator and illustrate the improved convergence rate in comparison to uniform mesh-refining. A higher convergence rate for piecewise affine data is observed in the 퐿2 stress error and reproduced in non-smooth situations by the adaptive mesh-refining strategy.
Original languageEnglish
Pages (from-to)205-234
Number of pages30
JournalNumerische Mathematik
Volume142
Early online date28 Feb 2019
DOIs
Publication statusPublished - 1 Jun 2019

Keywords

  • UT-Hybrid-D

Fingerprint Dive into the research topics of 'Residual-based a posteriori error analysis for symmetric mixed Arnold–Winther FEM'. Together they form a unique fingerprint.

Cite this