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

Geometry
---------

Flat square frame with two stays (cables) on both diagonals.


.. image:: images/1000166400002059000017AB4A6EB7C015B95C10.svg
    :width: 417
    :height: 305


.. _RefImage_1000166400002059000017AB4A6EB7C015B95C10.svg:

The cables are not connected in their middle.


Material properties
-----------------------

:math:`E=2.1{10}^{11}\mathrm{Pa}`

:math:`\nu =0.3`


Boundary conditions and loads
-------------------------------------

.. csv-table::

    ":math:`\mathrm{DZ}=0.` ", "knots 1, 2, 3, 4"
    ":math:`\mathrm{DY}=0.` ", "knots 1, 4"
    ":math:`\mathrm{DX}=0.` ", "node 1"
    ":math:`\mathrm{FX}=1000.N` ", "node 3"