Inf-sup stable finite-element pairs based on dual meshes and bases for nearly incompressible elasticity

Bishnu P. Lamichhane

Research output: Contribution to journalArticle

Abstract

We consider finite-element methods based on simplices to solve the problem of nearly incompressible elasticity. Two different approaches based, respectively, on dual meshes and dual bases are presented, where in both approaches pressure is discontinuous and can be statically condensed out from the system. These novel approaches lead to displacement-based low-order finite-element methods for nearly incompressible elasticity based on rigorous mathematical framework. Numerical results are provided to demonstrate the efficiency of the approach.

Original languageEnglish
Pages (from-to)404-420
Number of pages17
JournalIMA Journal of Numerical Analysis
Volume29
Issue number2
DOIs
Publication statusPublished - 9 May 2009

Keywords

  • dual bases
  • dual meshes
  • mixed finite elements
  • nearly incompressible elasticity
  • nodal average pressure

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