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compute_plasticity_atom.txt
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.. index:: compute plasticity/atom
compute plasticity/atom command
===============================
Syntax
""""""
.. parsed-literal::
compute ID group-ID plasticity/atom
* ID, group-ID are documented in compute command
* plasticity/atom = style name of this compute command
Examples
""""""""
.. parsed-literal::
compute 1 all plasticity/atom
Description
"""""""""""
Define a computation that calculates the per-atom plasticity for each
atom in a group. This is a quantity relevant for :doc:`Peridynamics models <pair_peri>`. See `this document <PDF/PDLammps_overview.pdf>`_
for an overview of LAMMPS commands for Peridynamics modeling.
The plasticity for a Peridynamic particle is the so-called consistency
parameter (lambda). For elastic deformation lambda = 0, otherwise
lambda > 0 for plastic deformation. For details, see
:ref:`(Mitchell) <Mitchell>` and the PDF doc included in the LAMMPS
distro in `doc/PDF/PDLammps_EPS.pdf <PDF/PDLammps_EPS.pdf>`_.
This command can be invoked for one of the Peridynamic :doc:`pair styles <pair_peri>`: peri/eps.
The plasticity value will be 0.0 for atoms not in the specified
compute group.
**Output info:**
This compute calculates a per-atom vector, which can be accessed by
any command that uses per-atom values from a compute as input. See
Section_howto 15 for an overview of LAMMPS output options.
The per-atom vector values are unitlesss numbers (lambda) >= 0.0.
Restrictions
""""""""""""
This compute is part of the PERI package. It is only enabled if
LAMMPS was built with that package. See the :ref:`Making LAMMPS <start_3>` section for more info.
Related commands
""""""""""""""""
:doc:`compute damage <compute_damage>`, :doc:`compute dilatation <compute_dilatation>`
**Default:** none
----------
.. _Mitchell:
**(Mitchell)** Mitchell, "A non-local, ordinary-state-based
viscoelasticity model for peridynamics", Sandia National Lab Report,
8064:1-28 (2011).
.. _lws: http://lammps.sandia.gov
.. _ld: Manual.html
.. _lc: Section_commands.html#comm
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