Finite strain discrete dislocation plasticity

VS Deshpande, A Needleman*, E Van der Giessen

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

61 Citaten (Scopus)
395 Downloads (Pure)

Samenvatting

A framework for carrying out finite deformation discrete dislocation plasticity calculations is presented. The discrete dislocations are presumed to be adequately represented by the singular linear elastic fields so that the large deformations near dislocation cores are not modeled. The finite deformation effects accounted for are: (i) finite lattice rotations and (ii) shape changes due to slip. As a consequence of the nonlinearity, an iterative procedure is needed to solve boundary value problems. Elastic anisotropy together with lattice curvature is shown to lead to a polarization stress term in the rate boundary value problem. The general three-dimensional framework is specialized to plane strain. The plane strain specialization is implemented in a conventional finite element code and two numerical examples are given: plane strain tension of a single crystal strip and combined bending and tension of that strip. The capabilities and limitations of a conventional finite element framework for this class of problems are illustrated and discussed. (C) 2003 Elsevier Ltd. All rights reserved.

Originele taal-2English
Pagina's (van-tot)2057-2083
Aantal pagina's27
TijdschriftJournal of the Mechanics and Physics of Solids
Volume51
Nummer van het tijdschrift11-12
DOI's
StatusPublished - 2003
EvenementSymposium on Dynamic Failure and thin Film Mechanics -
Duur: 16-jan.-200318-jan.-2003

Citeer dit