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

Geometry
---------


.. image:: images/100000000000040D000003F01AEAAF805DBE3678.png
    :width: 4.7244in
    :height: 4.5902in


.. _RefImage_100000000000040D000003F01AEAAF805DBE3678.png:

The truss consists of beams with sections:

• for the **----------**, ring fingers :math:`R=0.05`, :math:`\mathrm{ep}=0.02`

• for **----------**, circulars :math:`R=0.05`

• for **----------**, circulars :math:`R\mathrm{=}0.07`

Point :math:`A` is in the middle of the final stem.


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

Isotropic linear elastic material:

:math:`E\mathrm{=}1.962\mathit{E11}\mathit{Pa}`; :math:`\nu \mathrm{=}0.3`


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

The base of the mesh is embedded.

**Loading**

.. csv-table::

    "Vertical nodal force in :math:`A`:", ":math:`{F}_{y}\mathrm{=}–20E6N`"
    "Gravity field **(next** :math:`x` **)**", ":math:`g\mathrm{=}–9.81m\mathrm{/}{s}^{2}`"