<spanid="index-0"></span><h1>pair_style peri/pmb command<aclass="headerlink"href="#pair-style-peri-pmb-command"title="Permalink to this headline">¶</a></h1>
<h2>Description<aclass="headerlink"href="#description"title="Permalink to this headline">¶</a></h2>
<p>The peridynamic pair styles implement material models that can be used
at the mescscopic and macroscopic scales. See <aclass="reference external"href="PDF/PDLammps_overview.pdf">this document</a> for an overview of LAMMPS commands
for Peridynamics modeling.</p>
<p>Style <em>peri/pmb</em> implements the Peridynamic bond-based prototype
microelastic brittle (PMB) model.</p>
<p>Style <em>peri/lps</em> implements the Peridynamic state-based linear
peridynamic solid (LPS) model.</p>
<p>Style <em>peri/ves</em> implements the Peridynamic state-based linear
peridynamic viscoelastic solid (VES) model.</p>
<p>Style <em>peri/eps</em> implements the Peridynamic state-based elastic-plastic
solid (EPS) model.</p>
<p>The canonical papers on Peridynamics are <aclass="reference internal"href="#silling2000"><span>(Silling 2000)</span></a>
and <aclass="reference internal"href="#silling2007"><span>(Silling 2007)</span></a>. The implementation of Peridynamics
in LAMMPS is described in <aclass="reference internal"href="#parks"><span>(Parks)</span></a>. Also see the <aclass="reference external"href="http://www.sandia.gov/~mlparks/papers/PDLAMMPS.pdf">PDLAMMPS user guide</a> for
more details about its implementation.</p>
<p>The peridynamic VES and EPS models in PDLAMMPS were implemented by
<aclass="reference internal"href="read_data.html"><em>read_data</em></a> or <aclass="reference internal"href="read_restart.html"><em>read_restart</em></a>
commands, or by mixing as described below.</p>
<p>For the <em>peri/pmb</em> style:</p>
<ulclass="simple">
<li>c (energy/distance/volume^2 units)</li>
<li>horizon (distance units)</li>
<li>s00 (unitless)</li>
<li>alpha (unitless)</li>
</ul>
<p>C is the effectively a spring constant for Peridynamic bonds, the
enabled if LAMMPS was built with those packages. See the <aclass="reference internal"href="Section_start.html#start-3"><span>Making LAMMPS</span></a> section for more info.</p>
<p>You can specify the accelerated styles explicitly in your input script
by including their suffix, or you can use the <aclass="reference internal"href="Section_start.html#start-7"><span>-suffix command-line switch</span></a> when you invoke LAMMPS, or you can
use the <aclass="reference internal"href="suffix.html"><em>suffix</em></a> command in your input script.</p>
<p>See <aclass="reference internal"href="Section_accelerate.html"><em>Section_accelerate</em></a> of the manual for
more instructions on how to use the accelerated styles effectively.</p>
<p>These pair styles do not support mixing. Thus, coefficients for all
I,J pairs must be specified explicitly.</p>
<p>These pair styles do not support the <aclass="reference internal"href="pair_modify.html"><em>pair_modify</em></a>
shift option.</p>
<p>The <aclass="reference internal"href="pair_modify.html"><em>pair_modify</em></a> table and tail options are not
relevant for these pair styles.</p>
<p>These pair styles write their information to <aclass="reference internal"href="restart.html"><em>binary restart files</em></a>, so pair_style and pair_coeff commands do not need
to be specified in an input script that reads a restart file.</p>
<p>These pair styles can only be used via the <em>pair</em> keyword of the
<aclass="reference internal"href="run_style.html"><em>run_style respa</em></a> command. They do not support the
<h2>Restrictions<aclass="headerlink"href="#restrictions"title="Permalink to this headline">¶</a></h2>
<p>All of these styles are part of the PERI package. They are only
enabled if LAMMPS was built with that package. See the <aclass="reference internal"href="Section_start.html#start-3"><span>Making LAMMPS</span></a> section for more info.</p>
</div>
<divclass="section"id="related-commands">
<h2>Related commands<aclass="headerlink"href="#related-commands"title="Permalink to this headline">¶</a></h2>
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