On a new extended finite element method for dislocations: Core enrichment and nonlinear formulation

Robert Gracie, Jay Oswald, Ted Belytschko

Research output: Contribution to journalArticle

46 Scopus citations

Abstract

A recently developed finite element method for the modeling of dislocations is improved by adding enrichments in the neighborhood of the dislocation core. In this method, the dislocation is modeled by a line or surface of discontinuity in two or three dimensions. The method is applicable to nonlinear and anisotropic materials, large deformations, and complicated geometries. Two separate enrichments are considered: a discontinuous jump enrichment and a singular enrichment based on the closed-form, infinite-domain solutions for the dislocation core. Several examples are presented for dislocations constrained in layered materials in 2D and 3D to illustrate the applicability of the method to interface problems.

Original languageEnglish (US)
Pages (from-to)200-214
Number of pages15
JournalJournal of the Mechanics and Physics of Solids
Volume56
Issue number1
DOIs
StatePublished - Jan 1 2008
Externally publishedYes

Keywords

  • Dislocations
  • Extended finite element method
  • Interfaces
  • Nonlinear
  • Peach-Koehler force

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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