A multiscale phenomenological constitutive model for strain rate dependent tensile ductility in nanocrystalline metals

M. Amir Siddiq*, Tamer El Sayed

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Citations (Scopus)
5 Downloads (Pure)

Abstract

A variational multiscale constitutive model that accounts for strain rate dependent ductility of nanocrystalline materials during intergranular failure has been presented. The presented model is an extension of the previous work [1], in which a nanocrystalline material is modelled as two-phase with grain interior being modelled using crystal plasticity theory while grain boundary affected zone using porous plasticity model which accounts for ductile damage due to void growth and coalescence. The model capability of capturing the strain rate dependent deformation and failure has been demonstrated through validations against uniaxial test data taken from literature. The validated results show a good agreement between experimental and simulated response.

Original languageEnglish
Pages (from-to)60-63
Number of pages4
JournalMaterials Letters
Volume142
Early online date29 Nov 2014
DOIs
Publication statusPublished - 1 Mar 2015

Keywords

  • Crystal plasticity theory
  • Intergranular failure
  • Nanocrystalline materials
  • Strain rate sensitivity
  • Variational updates

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

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