Molecular dynamics study of dislocation nucleation from a crack tip

B Hess*, BJ Thijsse, E Van der Giessen, Barend J. Thijsse

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

16 Citaten (Scopus)
231 Downloads (Pure)

Samenvatting

We have performed a systematic molecular dynamics study of the competition between crack growth and dislocation emission from a crack tip. Two types of boundary conditions are adopted: either planar extension or boundary displacements according to the anisotropic mode-I asymptotic continuum solution. The effects of temperature, loading rate, crystal orientation, sharpness of the crack tip, atomic potential, and system size are investigated. Depending on the crystal orientation, dislocation nucleation can be driven either by the strain or by concerted fluctuations at the crack tip. In the latter case, crystal orientation and temperature have the largest influence on the process of dislocation nucleation.

Originele taal-2English
Artikelnummer054111
Pagina's (van-tot)art. - 054111
Aantal pagina's10
TijdschriftPhysical Review. B: Condensed Matter and Materials Physics
Volume71
Nummer van het tijdschrift5
DOI's
StatusPublished - feb-2005

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