LOCKING-FREE ENRICHED GALERKIN METHOD FOR LINEAR ELASTICITY

Son Young Yi, Sanghyun Lee, Ludmil Zikatanov

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

We propose a new locking-free enriched Galerkin method for solving the linear elasticity problem. The method is based on the discontinuous Galerkin formulation, but its approximation space is a continuous piecewise linear vector-valued function space enriched by some discontinuous piecewise linear functions. An a priori error estimate of optimal order in the energy norm is proved and shown to be independent of a Lam\'e parameter \lambda , hence the proposed method is free of volumetric locking when modeling incompressible materials. Moreover, a uniform preconditioner with respect to the mesh size is established in the operator preconditioning framework. We provide several numerical examples to confirm the accuracy and the robustness of the new method and demonstrate a good performance of the preconditioner.

Original languageEnglish (US)
Pages (from-to)52-75
Number of pages24
JournalSIAM Journal on Numerical Analysis
Volume60
Issue number1
DOIs
StatePublished - 2022

All Science Journal Classification (ASJC) codes

  • Numerical Analysis
  • Computational Mathematics
  • Applied Mathematics

Fingerprint

Dive into the research topics of 'LOCKING-FREE ENRICHED GALERKIN METHOD FOR LINEAR ELASTICITY'. Together they form a unique fingerprint.

Cite this