Discrete dislocation plasticity analysis of single slip tension

VS Deshpande*, A Needleman, E Van der Giessen

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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The effect of loading conditions on the tensile stress versus strain response of micron-sized planar crystals with a single active slip system is investigated via finite and small deformation discrete dislocation plasticity analyses. When rotation of the tensile axis is prevented, lattice curvature is induced in the crystal in both the small and finite strain analyses with the build-up of geometrically necessary dislocations resulting in a hardening response. The hardening rate is higher in the small strain analyses and this is attributed to the assumption of linear kinematics in that analysis. On the other hand, when rotation of the tensile axis is permitted, no lattice curvature is induced in the crystal in the small strain analysis resulting in an ideally plastic response. However, the change in the geometry of the crystal induces bending moments in the crystal in the finite strain analyses giving rise to a mildly hardening tensile stress versus strain response. (c) 2005 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)154-157
Number of pages4
JournalMaterials science and engineering a-Structural materials properties microstructure and processing
Issue number6
Publication statusPublished - 25-Jul-2005
EventIntenational Conference on Fundamentals of Plastic Deformation - , France
Duration: 13-Sept-200417-Sept-2004


  • mechanical properties
  • tension
  • size effects
  • computer simulation

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