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Multiscale modeling of plasticity in a copper single crystal deformed at high strain rates

Multiscale modeling of plasticity in a copper single crystal deformed at high strain rates Abstract A hierarchical multiscale modeling approach is presented to predict the mechanical response of dynamically deformed (1100 s−1−4500 s−1) copper single crystal in two different crystallographic orientations.Anattempt has been made to bridge the gap between nano-, micro- and meso- scales. In view of this, Molecular Dynamics (MD) simulations at nanoscale are performed to quantify the drag coefficient for dislocations which has been exploited in Dislocation Dynamics (DD) regime at the microscale. Discrete dislocation dynamics simulations are then performed to calculate the hardening parameters required by the physics based Crystal Plasticity (CP) model at the mesoscale. The crystal plasticity model employed is based on thermally activated theory for plastic flow. Crystal plasticity simulations are performed to quantify the mechanical response of the copper single crystal in terms of stressstrain curves and shape changes under dynamic loading. The deformation response obtained from CP simulations is in good agreement with the experimental data. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Plasticity and Mechanics of Defects de Gruyter

Multiscale modeling of plasticity in a copper single crystal deformed at high strain rates

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References (66)

Publisher
de Gruyter
Copyright
Copyright © 2015 by the
ISSN
2299-1166
eISSN
2299-1166
DOI
10.1515/pmd-2015-0001
Publisher site
See Article on Publisher Site

Abstract

Abstract A hierarchical multiscale modeling approach is presented to predict the mechanical response of dynamically deformed (1100 s−1−4500 s−1) copper single crystal in two different crystallographic orientations.Anattempt has been made to bridge the gap between nano-, micro- and meso- scales. In view of this, Molecular Dynamics (MD) simulations at nanoscale are performed to quantify the drag coefficient for dislocations which has been exploited in Dislocation Dynamics (DD) regime at the microscale. Discrete dislocation dynamics simulations are then performed to calculate the hardening parameters required by the physics based Crystal Plasticity (CP) model at the mesoscale. The crystal plasticity model employed is based on thermally activated theory for plastic flow. Crystal plasticity simulations are performed to quantify the mechanical response of the copper single crystal in terms of stressstrain curves and shape changes under dynamic loading. The deformation response obtained from CP simulations is in good agreement with the experimental data.

Journal

Plasticity and Mechanics of Defectsde Gruyter

Published: Sep 1, 2015

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