Reference problem
=====================


Geometry
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Material properties
-----------------------

Linear elasticity: :math:`E=1.\mathrm{MPa}` :math:`\nu =0.3`


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Boundary conditions and loads
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* Blocked on face :math:`1-4` next :math:`X` - node :math:`1` stuck next :math:`Y`.


* In single pull on the :math:`2\mathrm{-}3` side.


* Loading :math:`F(t)` jagged (based on the article by Downing and Society 1982) [:ref:`bib1 <bib1>`].


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Initial conditions
--------------------

Zero stresses and deformations.