Bridging atomistic/continuum scales in solids with moving dislocations

Shao Qiang Tang*, Wing K. Liu, Eduard G. Karpov, Thomas Y. Hou

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

We propose a multiscale method for simulating solids with moving dislocations. Away from atomistic subdomains where the atomistic dynamics are fully resolved, a dislocation is represented by a localized jump profile, superposed on a defect-free field. We assign a thin relay zone around an atomistic subdomain to detect the dislocation profile and its propagation speed at a selected relay time. The detection technique utilizes a lattice time history integral treatment. After the relay, an atomistic computation is performed only for the defect-free field. The method allows one to effectively absorb the fine scale fluctuations and the dynamic dislocations at the interface between the atomistic and continuum domains. In the surrounding region, a coarse grid computation is adequate.

Original languageEnglish (US)
Article number044
Pages (from-to)161-164
Number of pages4
JournalChinese Physics Letters
Volume24
Issue number1
DOIs
StatePublished - Jan 1 2007

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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