<p>Define a computation that outputs the rate of the logarithmic strain
tensor for particles interacting via the updated Lagrangian SPH pair
style.</p>
<p>See <aclass="reference external"href="USER/smd/SMD_LAMMPS_userguide.pdf">this PDF guide</a> to using Smooth
Mach Dynamics in LAMMPS.</p>
<p><strong>Output info:</strong></p>
<p>This compute calculates a per-particle vector of vectors (tensors),
which can be accessed by any command that uses per-particle values
from a compute as input. See <aclass="reference internal"href="Section_howto.html#howto-15"><spanclass="std std-ref">Section_howto 15</span></a> for an overview of LAMMPS output
options.</p>
<p>The values will be given in <aclass="reference internal"href="units.html"><spanclass="doc">units</span></a> of one over time.</p>
<p>The per-particle vector has 6 entries, corresponding to the xx, yy,
zz, xy, xz, yz components of the symmetric strain rate tensor.</p>
</div>
<divclass="section"id="restrictions">
<h2>Restrictions</h2>
<p>This compute is part of the USER-SMD package. It is only enabled if
LAMMPS was built with that package. See the <aclass="reference internal"href="Section_start.html#start-2"><spanclass="std std-ref">Making LAMMPS</span></a> section for more info. This compute
can only be used for particles which interact with the updated
Built with <ahref="http://sphinx-doc.org/">Sphinx</a> using a <ahref="https://github.com/snide/sphinx_rtd_theme">theme</a> provided by <ahref="https://readthedocs.org">Read the Docs</a>.