Coupling the dynamics of statistically distributed and excess dislocations

Satya Varadhan, Armand J. Beaudoin, Claude Fressengeas

Research output: Contribution to journalConference article

Abstract

Modeling the self-organization and collective behavior of dislocation ensembles is of primary concern in this work. Two dislocation species are considered: excess dislocations seen as a manifestation of lattice incompatibility, and statistically distributed dislocations, which induce compatible deformation. Conventional slip-based crystal plasticity is used to model the behavior and dynamics of the latter, while Field Dislocation Mechanics is employed to account for the former. Coupling the dynamics of both species proceeds along two reciprocal ways: spatial gradients in slip produced by mobile statistical dislocations leads to nucleation of excess dislocations, while excess dislocations contribute to forest hardening. Illustration is given to the evolution of mobile and excess dislocation density. Dislocation arrangements resulting from the model are presented.

Original languageEnglish (US)
Article number004
JournalProceedings of Science
Volume23
StatePublished - Jan 1 2005
Event2005 International Conference on Statistical Mechanics of Plasticity and Related Instabilities, SMPRI 2005 - Bangalore, India
Duration: Aug 29 2005Sep 2 2005

ASJC Scopus subject areas

  • General

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