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<title>pair_style smd/tlsph command &mdash; LAMMPS documentation</title>
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<li class="toctree-l1"><a class="reference internal" href="Section_intro.html">1. Introduction</a></li>
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<div class="section" id="pair-style-smd-tlsph-command">
<span id="index-0"></span><h1>pair_style smd/tlsph command<a class="headerlink" href="#pair-style-smd-tlsph-command" title="Permalink to this headline"></a></h1>
<div class="section" id="syntax">
<h2>Syntax<a class="headerlink" href="#syntax" title="Permalink to this headline"></a></h2>
<div class="highlight-python"><div class="highlight"><pre>pair_style smd/tlsph args
</pre></div>
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<div class="section" id="examples">
<h2>Examples<a class="headerlink" href="#examples" title="Permalink to this headline"></a></h2>
<p>pair_style smd/tlsph</p>
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<div class="section" id="description">
<h2>Description<a class="headerlink" href="#description" title="Permalink to this headline"></a></h2>
<p>The <em>smd/tlsph</em> style computes particle interactions according to continuum mechanics constitutive laws and a Total-Lagrangian Smooth-Particle Hydrodynamics algorithm.</p>
<p>This pair style is invoked with the following command:</p>
<div class="highlight-python"><div class="highlight"><pre>pair_style smd/tlsph
pair_coeff i j *COMMON rho0 E nu Q1 Q2 hg Cp &amp;
*END
</pre></div>
</div>
<p>Here, <em>i</em> and <em>j</em> denote the <em>LAMMPS</em> particle types for which this pair style is
defined. Note that <em>i</em> and <em>j</em> must be equal, i.e., no <em>tlsph</em> cross interactions
between different particle types are allowed.
In contrast to the usual <em>LAMMPS</em> <em>pair coeff</em> definitions, which are given solely a
number of floats and integers, the <em>tlsph</em> <em>pair coeff</em> definition is organised using
keywords. These keywords mark the beginning of different sets of parameters for particle properties,
material constitutive models, and damage models. The <em>pair coeff</em> line must be terminated with
the <a href="#id5"><span class="problematic" id="id6">**</span></a>END* keyword. The use the line continuation operator <em>&amp;</em> is recommended. A typical
invocation of the <em>tlsph</em> for a solid body would consist of an equation of state for computing
the pressure (the diagonal components of the stress tensor), and a material model to compute shear
stresses (the off-diagonal components of the stress tensor). Damage and failure models can also be added.</p>
<p>Please see the <a class="reference external" href="USER/smd/SMD_LAMMPS_userguide.pdf">SMD user guide</a> for a complete listing of the possible keywords and material models.</p>
<hr class="docutils" />
<p><strong>Mixing, shift, table, tail correction, restart, rRESPA info</strong>:</p>
<p>No mixing is performed automatically.
Currently, no part of USER-SMD supports restarting nor minimization.
rRESPA does not apply to this pair style.</p>
</div>
<hr class="docutils" />
<div class="section" id="restrictions">
<h2>Restrictions<a class="headerlink" href="#restrictions" title="Permalink to this headline"></a></h2>
<p>This fix is part of the USER-SMD package. It is only enabled if
LAMMPS was built with that package. See the <a class="reference internal" href="Section_start.html#start-3"><span>Making LAMMPS</span></a>
section for more info.</p>
</div>
<div class="section" id="related-commands">
<h2>Related commands<a class="headerlink" href="#related-commands" title="Permalink to this headline"></a></h2>
<p><a class="reference internal" href="pair_coeff.html"><em>pair_coeff</em></a></p>
<p><strong>Default:</strong> none</p>
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