Statistical aspects of discrete dislocation plasticity

A Needleman*, E Van der Giessen, VS Deshpande

*Corresponding author for this work

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Abstract

Discrete dislocation calculations suggest that statistical effects are important in the modeling of crystal plasticity. These include: (i) effects of source limited plasticity; (ii) statistical variations of dislocation sources and obstacles in small volumes; and (iii) the sensitivity of the discrete dislocation predictions to small perturbations. Implications of these for phenomenological constitutive models and for statistical theories of the collective behavior of dislocations are discussed. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)729-733
Number of pages5
JournalScripta Materialia
Volume54
Issue number5
DOIs
Publication statusPublished - Mar-2006

Keywords

  • dislocation
  • theory
  • micromechanical modeling
  • HARDENING MECHANISMS
  • SINGLE-CRYSTALS
  • GRADIENT THEORY
  • THIN-FILMS
  • DYNAMICS
  • SCALE
  • FCC
  • SIMULATIONS
  • BEHAVIOR
  • TENSION

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