forked from lijiext/lammps
74 lines
2.3 KiB
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74 lines
2.3 KiB
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<CENTER><A HREF = "http://lammps.sandia.gov">LAMMPS WWW Site</A> - <A HREF = "Manual.html">LAMMPS Documentation</A> - <A HREF = "Section_commands.html#comm">LAMMPS Commands</A>
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<H3>compute plasticity/atom command
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</H3>
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<P><B>Syntax:</B>
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</P>
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<PRE>compute ID group-ID plasticity/atom
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</PRE>
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<UL><LI>ID, group-ID are documented in compute command
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<LI>plasticity/atom = style name of this compute command
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</UL>
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<P><B>Examples:</B>
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</P>
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<PRE>compute 1 all plasticity/atom
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</PRE>
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<P><B>Description:</B>
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</P>
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<P>Define a computation that calculates the per-atom plasticity for each
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atom in a group. This is a quantity relevant for <A HREF = "pair_peri.html">Peridynamics
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models</A>. See <A HREF = "PDF/PDLammps_overview.pdf">this document</A>
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for an overview of LAMMPS commands for Peridynamics modeling.
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</P>
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<P>The plasticity for a Peridynamic particle is the so-called consistency
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parameter (lambda). For elastic deformation lambda = 0, otherwise
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lambda > 0 for plastic deformation. For details, see
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<A HREF = "#Mitchell">(Mitchell)</A> and the PDF doc included in the LAMMPS
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distro in <A HREF = "PDF/PDLammps_EPS.pdf">doc/PDF/PDLammps_EPS.pdf</A>.
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</P>
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<P>This command can be invoked for one of the Peridynamic <A HREF = "pair_peri.html">pair
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styles</A>: peri/eps.
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</P>
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<P>The plasticity value will be 0.0 for atoms not in the specified
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compute group.
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</P>
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<P><B>Output info:</B>
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</P>
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<P>This compute calculates a per-atom vector, which can be accessed by
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any command that uses per-atom values from a compute as input. See
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Section_howto 15 for an overview of LAMMPS output options.
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</P>
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<P>The per-atom vector values are unitlesss numbers (lambda) >= 0.0.
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</P>
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<P><B>Restrictions:</B>
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</P>
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<P>This compute is part of the PERI package. It is only enabled if
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LAMMPS was built with that package. See the <A HREF = "Section_start.html#start_3">Making
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LAMMPS</A> section for more info.
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</P>
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<P><B>Related commands:</B>
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</P>
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<P><A HREF = "compute_damage.html">compute damage</A>, <A HREF = "compute_dilatation.html">compute
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dilatation</A>
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</P>
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<P><B>Default:</B> none
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</P>
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<HR>
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<A NAME = "Mitchell"></A>
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<P><B>(Mitchell)</B> Mitchell, "A non-local, ordinary-state-based
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viscoelasticity model for peridynamics", Sandia National Lab Report,
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8064:1-28 (2011).
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</P>
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</HTML>
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