.. _v3.05.104-probleme_reference:


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

Geometry A
-----------

| The geometry is along the axis:math: `X`.
| The coordinates of the nodes, in the global coordinate system:

.. csv-table::
   :width: 75%
 :align: center

   **Node**, **X**, **Y**, **Z**
   **A**, :math:`0.0`, :math:`0.0`, :math:`0.0`
   **B**, :math:`L`, :math:`0.0`, :math:`0.0`
   **C**, :math:`L.cos(\beta).cos(\alpha)`, :math:`L.cos(\beta).sin(\alpha)`, :math:`L.sin(\beta)`

The modeling consists of:

* "POUTA": it is a "SEG2" between the nodes :math:`A` and :math:`B` with a "POU_D_E" pattern.
* "POUTB": it is a "SEG2" between the nodes :math:`A` and :math:`C` with a "POU_D_E" pattern.
* "DISCA": it is a "SEG2" between the nodes :math:`A` and :math:`B` with a "DIS_TR" pattern.
* "DISCB": it is a "SEG2" between the nodes :math:`A` and :math:`C` with a "DIS_TR" pattern.


Loads
-----------

Boundary conditions
^^^^^^^^^^^^^^^^^^^^^^^^^

The node :math:`A` is embedded and on the nodes :math:`B` and :math:`C` an effort is imposed along the axis of the element.