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<li class="toctree-l1"><a class="reference internal" href="Section_accelerate.html">5. Accelerating LAMMPS performance</a></li>
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<li>compute smd/tlsph/stress command</li>
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<div class="section" id="compute-smd-tlsph-stress-command">
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<span id="index-0"></span><h1>compute smd/tlsph/stress command</h1>
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<div class="section" id="syntax">
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<h2>Syntax</h2>
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<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">compute</span> <span class="n">ID</span> <span class="n">group</span><span class="o">-</span><span class="n">ID</span> <span class="n">smd</span><span class="o">/</span><span class="n">tlsph</span><span class="o">/</span><span class="n">stress</span>
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</pre></div>
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<ul class="simple">
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<li>ID, group-ID are documented in <a class="reference internal" href="compute.html"><span class="doc">compute</span></a> command</li>
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<li>smd/tlsph/stress = style name of this compute command</li>
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</ul>
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</div>
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<div class="section" id="examples">
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<h2>Examples</h2>
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<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">compute</span> <span class="mi">1</span> <span class="nb">all</span> <span class="n">smd</span><span class="o">/</span><span class="n">tlsph</span><span class="o">/</span><span class="n">stress</span>
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</pre></div>
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</div>
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</div>
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<div class="section" id="description">
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<h2>Description</h2>
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<p>Define a computation that outputs the Cauchy stress tensor for
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particles interacting via the Total-Lagrangian SPH pair style.</p>
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<p>See <a class="reference external" href="USER/smd/SMD_LAMMPS_userguide.pdf">this PDF guide</a> to using Smooth
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Mach Dynamics in LAMMPS.</p>
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<p><strong>Output info:</strong></p>
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<p>This compute calculates a per-particle vector of vectors (tensors), which can be
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accessed by any command that uses per-particle values from a compute
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as input. See
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<a class="reference internal" href="Section_howto.html#howto-15"><span class="std std-ref">How-to discussions, section 6.15</span></a>
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for an overview of LAMMPS output options.</p>
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<p>The values will be given in <a class="reference internal" href="units.html"><span class="doc">units</span></a> of pressure.</p>
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<p>The per-particle vector has 7 entries. The first six entries
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correspond to the xx, yy, zz, xy, xz and yz components of the
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symmetric Cauchy stress tensor. The seventh entry is the second
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invariant of the stress tensor, i.e., the von Mises equivalent stress.</p>
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</div>
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<div class="section" id="restrictions">
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<h2>Restrictions</h2>
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<p>This compute 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 class="reference internal" href="Section_start.html#start-3"><span class="std std-ref">Making LAMMPS</span></a> section for more info.</p>
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<p>This quantity will be computed only for particles which interact with
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the Total-Lagrangian SPH pair style.</p>
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</div>
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<div class="section" id="related-commands">
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<h2>Related commands</h2>
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<p><a class="reference internal" href="compute_smd_tlsph_strain.html"><span class="doc">compute smd/tlsph/strain</span></a>, <a class="reference internal" href="compute_smd_tlsph_strain_rate.html"><span class="doc">cmopute smd/tlsph/strain/rate</span></a></p>
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<p><strong>Default:</strong> none</p>
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