forked from lijiext/lammps
71 lines
2.5 KiB
HTML
71 lines
2.5 KiB
HTML
<HTML>
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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>pair_style smd/tlsph command
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</H3>
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<P><B>Syntax:</B>
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</P>
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<PRE>pair_style smd/tlsph args
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</PRE>
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<P><B>Examples:</B>
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</P>
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<P>pair_style smd/tlsph
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</P>
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<P><B>Description:</B>
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</P>
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<P>The <I>smd/tlsph</I> style computes particle interactions according to continuum mechanics constitutive laws and a Total-Lagrangian Smooth-Particle Hydrodynamics algorithm.
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</P>
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<P>This pair style is invoked with the following command:
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</P>
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<PRE>pair_style smd/tlsph
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pair_coeff i j *COMMON rho0 E nu Q1 Q2 hg Cp &
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*END
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</PRE>
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<P>Here, <I>i</I> and <I>j</I> denote the <I>LAMMPS</I> particle types for which this pair style is
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defined. Note that <I>i</I> and <I>j</I> must be equal, i.e., no <I>tlsph</I> cross interactions
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between different particle types are allowed.
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In contrast to the usual <I>LAMMPS</I> <I>pair coeff</I> definitions, which are given solely a
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number of floats and integers, the <I>tlsph</I> <I>pair coeff</I> definition is organised using
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keywords. These keywords mark the beginning of different sets of parameters for particle properties,
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material constitutive models, and damage models. The <I>pair coeff</I> line must be terminated with
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the <I>*END</I> keyword. The use the line continuation operator <I>&</I> is recommended. A typical
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invocation of the <I>tlsph</I> for a solid body would consist of an equation of state for computing
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the pressure (the diagonal components of the stress tensor), and a material model to compute shear
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stresses (the off-diagonal components of the stress tensor). Damage and failure models can also be added.
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</P>
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<P>Please see the <A HREF = "USER/smd/SMD_LAMMPS_userguide.pdf">SMD user guide</A> for a complete listing of the possible keywords and material models.
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</P>
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<HR>
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<P><B>Mixing, shift, table, tail correction, restart, rRESPA info</B>:
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</P>
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<P>No mixing is performed automatically.
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Currently, no part of USER-SMD supports restarting nor minimization.
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rRESPA does not apply to this pair style.
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</P>
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<HR>
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<P><B>Restrictions:</B>
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</P>
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<P>This fix is part of the USER-SMD 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 LAMMPS</A>
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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 = "pair_coeff.html">pair_coeff</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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</HTML>
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