Dislocation Dynamics for Plasticity Boundary Value Problems

Erik van der Giessen, Alan Needleman

Research output: Chapter in Book/Report/Conference proceedingEntry for encyclopedia/dictionaryAcademicpeer-review

3 Citations (Scopus)

Abstract

Plastic deformation of crystalline metals mainly takes place by the nucleation and motion of dislocations, line defects in the atomic lattice. At a length scales of micrometers, dislocations can conveniently be idealized as discrete line defects in an elastic continuum and plastic deformation can be represented by the evolution of the dislocation structure. This mesoscopic description is commonly referred to as discrete dislocation plasticity. The focus in the present article is on the solution of initial/boundary value problems using discrete dislocation plasticity. A brief summary of the underlying dislocation dynamics is given, methods used to describe plasticity in terms of evolving dislocation structures are described, some results are presented that illustrate unique capabilities of discrete dislocation plasticity, and needs as well as opportunities for future development are indicated.
Original languageEnglish
Title of host publicationEncyclopedia of Materials
Subtitle of host publicationMetals and Alloys
Place of PublicationOxford
PublisherElsevier
Pages541-551
Number of pages11
Volume4
ISBN (Electronic)9780128197264
ISBN (Print)9780128197332
DOIs
Publication statusPublished - 2022

Keywords

  • crystal plasticity
  • Discrete dislocation plasticity
  • Fatigue
  • Finite element method
  • Fracture
  • Size effects
  • Thin films

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