GNDs in nonlocal plasticity theories: lessons from discrete dislocation simulations

E. van der Giessen, A. Needleman

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Abstract

Solutions to simple boundary value problems using discrete dislocation plasticity exhibit key features associated with an accumulation of geometrically necessary dislocations: size effects and long-range stresses. Comparisons of the predictions of nonlocal plasticity theories with the discrete dislocation results provide an assessment of the strengths and weaknesses of various phenomenological theories and also provide a means of identifying appropriate nonlocal boundary conditions. (C) 2002 Published by Elsevier Science Ltd. on behalf of Acta Materialia Inc.

Original languageEnglish
Article numberPII S1359-6462(02)00332-9
Pages (from-to)127-132
Number of pages6
JournalScripta Materialia
Volume48
Issue number2
DOIs
Publication statusPublished - 13-Jan-2003

Keywords

  • dislocation theory
  • mechanical properties
  • plastic deformation
  • micro-mechanical modeling
  • strain gradient plasticity
  • STRAIN GRADIENT PLASTICITY
  • CRYSTAL PLASTICITY
  • DEFORMATION
  • PREDICTIONS
  • COMPOSITE
  • CONTINUUM
  • FLOW

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