von Mises effective stress
==========================

Overview
--------

This is the standard von Mises effective stress defined by

.. math::
   \sigma_e = \sqrt{\frac{3}{2}\bm{s}:\bm{s}}

with :math:`\bm{s}` the deviatoric stress.

Parameters
----------

None.

Class description
-----------------

.. doxygenclass:: neml::VonMisesEffectiveStress
   :members:
   :undoc-members: