The bowing of a dislocation segment
- 1 May 1967
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine
- Vol. 15 (137) , 1011-1021
- https://doi.org/10.1080/14786436708221645
Abstract
The bowing under stress of a segment of an otherwise straight dislocation line has been determined for an isotropic solid. A digital computer is used to relax the dislocation to its equilibrium shape, using a variant of the Brown self-stress method. The critical stress required to make the dislocation become unstable has been determined for a wide range of segment lengths, and is in fair agreement with the predictions of the line tension model. The results are relevant to a Frank-Read source, since the elevation of the side-arms is shown to have a relatively minor effect on the critical bowing. The bowing of a screw dislocation between several attractive forest screw dislocations has also been considered.Keywords
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