Coupled atomistic-mesoscopic model of polycrystalline plasticity

Fabrizio Cleri, Gregorio D'Agostino, Alessandra Satta, Luciano Colombo

Research output: Contribution to journalArticle

Abstract

We discuss a microstructure evolution framework which couples atomic-level information about extended-defect interactions into a mesoscopic model; the latter, in turn, describes the dy-namic evolution of a statistical population of grain boundaries and dislocations. Atomistic simulations are carried out by means of molecular dynamics simulations on both isolated and interacting dislocations, grain boundaries, triple junctions, microcracks; the reference material for such studies is, at present, Silicon with the Stillinger-Weber potential. The mesoscale model describes the motion of discrete triple junctions (and, consequently, of the continuous network of adjoining grain boundaries) embedded in a continuous medium containing a homogeneous, evolving distribution of dislocations.
Original languageEnglish
Pages (from-to)AA7.6.1 - AA7.6.6
JournalMaterials Research Society Symposium - Proceedings
Volume677
Publication statusPublished - 2001

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All Science Journal Classification (ASJC) codes

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

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