Journal of Solid Mechanics and Materials Engineering
Online ISSN : 1880-9871
Papers(Special Issue)
Atomistic Simulations of Dislocation - Crack Interaction
Erik BITZEKPeter GUMBSCH
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2008 Volume 2 Issue 10 Pages 1348-1359

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Abstract

The interaction of dislocations with a static mode I crack is studied by large scale molecular dynamics simulations. The model consists of a blunted [001](110) crack in nickel, to which after relaxation at K < KIc the displacement field of a dislocation is added. The response of the system is monitored during its evolution in the micro-canonical ensemble. The simulations allowed to identify different characteristic processes during the interaction of the impinging dislocation with the crack. In particular, stimulated dislocation emission and cross slip processes are observed to be important for the development of a plastic zone.

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© 2008 by The Japan Society of Mechanical Engineers
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