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

• Authors: Sagar Chandra , M. K. Samal , V. M. Chavan , R. J. Patel
• Languages of publication: EN

Abstracts

EN

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.

Keywords

EN

Multiscale modeling; Dislocations; Crystalplasticity; Finite elementGrid

• Publisher: De Gruyter Open
• Journal: Plasticity and Mechanics of Defects
• Year: 2015
• Volume: 1
• Issue: 1

Dates

online

1 - 9 - 2015

received

16 - 2 - 2015

accepted

25 - 6 - 2015

Contributors

author

Sagar Chandra

• Refueling Technology
  Division, Bhabha Atomic Research Centre, Mumbai - 400 085, India

author

M. K. Samal

• Reactor Safety Division,
  Bhabha Atomic Research Centre, Mumbai - 400 085, India

author

V. M. Chavan

• Refueling Technology
  Division, Bhabha Atomic Research Centre, Mumbai - 400 085, India

author

R. J. Patel

• Refueling Technology
  Division, Bhabha Atomic Research Centre, Mumbai - 400 085, India

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Identifiers

DOI

10.1515/pmd-2015-0001