Plasticity and dislocation dynamics in a phase field crystal model

Pak Yuen Chan, Georgios Tsekenis, Jonathan Dantzig, Karin A. Dahmen, Nigel Goldenfeld

Research output: Contribution to journalArticle

Abstract

The critical dynamics of dislocation avalanches in plastic flow is examined using a phase field crystal model. In the model, dislocations are naturally created, without any ad hoc creation rules, by applying a shearing force to the perfectly periodic ground state. These dislocations diffuse, interact and annihilate with one another, forming avalanche events. By data collapsing the event energy probability density function for different shearing rates, a connection to interface depinning dynamics is confirmed. The relevant critical exponents agree with mean field theory predictions.

Original languageEnglish (US)
Article number015502
JournalPhysical review letters
Volume105
Issue number1
DOIs
StatePublished - Jun 28 2010

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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