Open AccessA STUDY ON MOVING SCREW DISLOCATION BY THE METHOD OF GAUGE FIELD THEORY FOR CRYSTAL DEFECTS
Author(s) -
Fei Gao,
Suling Yang
Publication year - 1990
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.39.81
Subject(s) - dislocation , peierls stress , dislocation creep , crystal (programming language) , stress field , materials science , gauge (firearms) , field (mathematics) , stress (linguistics) , condensed matter physics , constant (computer programming) , zero (linguistics) , gauge theory , classical mechanics , physics , mechanics , quantum mechanics , mathematics , thermodynamics , computer science , linguistics , philosophy , finite element method , pure mathematics , metallurgy , programming language
In this paper, the gauge field theory of crystal defects is applied to analyse the characteristics of moving screw dislocation. The dynamic equations of screw dislocation are solved under certain gauge condition and the stress fields of uniformly moving screw dislocation are obtained. When K = μ/s (x is the coupling constant) approaches zero, the form of stress fields tends to be the same as that of uniformlymoving Volterra dislocation, but the limiting velocity happens to be 21/2c. When the velocity of this dislocation is zero, the stress are the same as that of Volterra dislocation at rest. Finally, the results are discussed in brief.