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Orientation-dependent Pattern Formation in a 1.5D Continuum Model of Curved Dislocations

Published online by Cambridge University Press:  27 February 2015

Stefan Sandfeld ,
Vanessa Verbeke  and
Benoit Devincre
Stefan Sandfeld
Affiliation:
Institute for Materials Simulation (WW8), Friedrich-Alexander-University Erlangen-Nürnberg, Dr.-Mack-Str. 77, 90762 Fürth, Germany
Vanessa Verbeke
Affiliation:
Laboratoire d’Etude des Microstructures, UMR 104 CNRS-ONERA, Chatillon, France
Benoit Devincre
Affiliation:
Laboratoire d’Etude des Microstructures, UMR 104 CNRS-ONERA, Chatillon, France
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Abstract

Dislocation pattern formation is a phenomenon where during significant plastic deformation dislocations organize themselves into (meta)stable structures. Modeling such systems is a non-trivial task, because the number of interacting dislocations is high, bringing discrete simulation models to their computational limits. Continuum models, although more efficient, generally do not contain sufficient information for a physically detailed representation of such systems. In this paper we show how a continuum dislocation dynamics theory can be used to model idealized pattern formation. Furthermore, we show how discrete dislocation dynamics (DD) simulations can be used to provide physical input for our continuum model.

Keywords

simulationcrystaldislocations
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1755: Symposium RR – Scaling Effects on Plasticity—Synergy between Simulations and Experiments , 2015 , mrsf14-1755-rr10-01
Copyright
Copyright © Materials Research Society 2015 

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References

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