Continuum dislocation dynamics: Towards a physical theory of crystal plasticity

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Hochrainer T, Sandfeld S, Zaiser M, Gumbsch P
Zeitschrift: Journal of the Mechanics and Physics of Solids
Verlag: Elsevier
Jahr der Veröffentlichung: 2014
Band: 63
Heftnummer: 1
Seitenbereich: 167-178
ISSN: 0022-5096


Abstract


The plastic deformation of metals is the result of the motion and interaction of dislocations, line defects of the crystalline structure. Continuum models of plasticity, however, remain largely phenomenological to date, usually do not consider dislocation motion, and fail when materials behavior becomes size dependent. In this work we present a novel plasticity theory based on systematic physical averages of the kinematics and dynamics of dislocation systems. We demonstrate that this theory can predict microstructure evolution and size effects in accordance with experiments and discrete dislocation simulations. The theory is based on only four internal variables per slip system and features physical boundary conditions, dislocation pile ups, dislocation curvature, dislocation multiplication and dislocation loss. The presented theory therefore marks a major step towards a physically based theory of crystal plasticity. © 2013 Elsevier Ltd.



FAU-Autoren / FAU-Herausgeber

Sandfeld, Stefan Dr.
Lehrstuhl für Werkstoffsimulation
Zaiser, Michael Prof. Dr.
Lehrstuhl für Werkstoffsimulation


Autor(en) der externen Einrichtung(en)
Karlsruhe Institute of Technology (KIT)
Technische Universität Graz


Zitierweisen

APA:
Hochrainer, T., Sandfeld, S., Zaiser, M., & Gumbsch, P. (2014). Continuum dislocation dynamics: Towards a physical theory of crystal plasticity. Journal of the Mechanics and Physics of Solids, 63(1), 167-178. https://dx.doi.org/10.1016/j.jmps.2013.09.012

MLA:
Hochrainer, Thomas, et al. "Continuum dislocation dynamics: Towards a physical theory of crystal plasticity." Journal of the Mechanics and Physics of Solids 63.1 (2014): 167-178.

BibTeX: 

Zuletzt aktualisiert 2018-02-12 um 13:50