Driving Forces and Boundary Conditions in Continuum Dislocation Mechanics

Preprint

20 May 2002

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0205402

Abstract

As a guide to constitutive specification, driving forces for dislocation velocity and nucleation rates are derived for a field theory of dislocation mechanics. A condition of closure for the theory in the form of a boundary condition for dislocation density is also derived. Kinematical features of dislocation evolution like initiation of bowing of a pinned screw segment, and initiation of cross-slip of a screw segment are discussed. An exact solution for the expansion of a polygonal loop as well as representation within the theory of dislocation level Schmid and non-Schmid behavior, and unloaded stress-free and steady microstructures are also discussed.

Keywords

CONTINUUM DISLOCATION
DISLOCATION MECHANICS
BOUNDARY CONDITION
MICROSTRUCTURES
SCREW SEGMENT
NUCLEATION
EVOLUTION
SEGMENT
SCHMID

All Related Versions

Version 1, 2002-05-20, ArXiv

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