Modeling A
==============


Geometry
---------

This two-dimensional case is a square with a unit side.

It is divided into two parts according to the equation diagonal *x + y = 1*.


.. image:: images/10000718000069D500004E087A238AF63325F0CC.svg
    :width: 413
    :height: 315


.. _RefImage_10000718000069D500004E087A238AF63325F0CC.svg:


Boundary conditions and changes
-------------------------------------

The piece is stuck in translation on the left side:

.. code-block:: text

    Segment BORD_GAU: DNOR = 0

    It is locked in rotation around the origin: DY = 0

Pressure is applied to the upper edge.

Segment BORD_SUP: PRES = 1000.

The other edges have zero stress.


Characteristics of the mesh
----------------------------


.. image:: images/10000C18000069D5000052FECA52BBF3828B5A9C.svg
    :width: 413
    :height: 315


.. _RefImage_10000C18000069D5000052FECA52BBF3828B5A9C.svg:

The structure is meshed in a "British flag", with TRIA6 elements. The edges are meshed in SEG3. The sketch shows the sub-domain number assigned to each triangle.


Benchmark results
----------------------

The displacement is tested on the node opposite to the origin.


.. csv-table::

    "", "**After adaptation 4**", "**After adaptation 5**"
    "XX", "5,1236224 10—3", "5,1284749 10—3"
    "DY", "—2,7452157 10—2", "—3,1219320 10—2"



notes
---------

It can be seen that the overall quantities (masses, center of gravity,...) are well preserved by the adaptation process.