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A Method for Describing a Flexible Dislocation
Author(s) -
Bacon D. J.
Publication year - 1967
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19670230212
Subject(s) - bowing , dislocation , stacking fault energy , tension (geology) , line (geometry) , stress (linguistics) , orientation (vector space) , geometry , extension (predicate logic) , mechanics , materials science , structural engineering , mathematics , physics , compression (physics) , computer science , condensed matter physics , engineering , composite material , psychology , philosophy , linguistics , communication , programming language
A procedure for determining the equilibrium shape of a dislocation under the influence of both internal and external stress fields is described. The method, which is an extension of that used by Brown to determine the shape of extended nodes, does not require the explicit numerical integration of line integrals to obtain the self‐stress, and line shapes are therefore computed with comparative simplicity. The procedure has been used to study the bowing characteristics and the critical shapes and stresses of Frank‐Read sources of various lengths and orientations, and the results are compared with those of the line tension model. The effects on the critical features of an orientation‐dependent friction stress have also been studied. Similar results on the bowing characteristics of a dissociated dislocation in the f.c.c. structure and their dependence on stacking fault energy are also presented.