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


Characteristics of modeling
-----------------------------------

MEC3QU9H (degenerate 3D shell)


.. image:: images/Object_6.svg
    :width: 328
    :height: 97


.. _RefImage_Object_6.svg:

modeling COQUE_3D - regular mesh.


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

Number of knots: 33

Number of meshes and type: 10 QUAD9


Tested features
-----------------------


* The geometric nonlinear element COQUE_3D,


* The static algorithm for updating large rotations GROT_GDEP from STAT_NON_LINE,


* The use of a follower pressure.


Results of modeling A
------------------------------

History of horizontal displacement :math:`\mathit{DX}` (:math:`m`) in the middle of :math:`\mathit{P1P2}`


.. csv-table::

    "**Moment**", "**Press**
    :math:`p` ", "**Reference**
    **(Samcef)**"



.. csv-table::

    "13. ", "13. ", "—9.03743E+00"
    "26. ", "26. ", "—1.41513E+01"


Story of vertical displacement :math:`\mathit{DZ}` (m) in the middle of :math:`\mathit{P1P2}`


.. csv-table::

    "**Moment**", "**Press**
    :math:`P` ", "**Reference**
    **(Samcef)**"



.. csv-table::

    "13. ", "13. ", "—8.42753E+00"
    "26. ", "26. ", "—4.43375E+00"


History of the horizontal rotation :math:`\mathit{DRY}` in the middle of :math:`\mathit{P1P2}`


.. csv-table::

    "**Moment**", "**Press**
    :math:`p` ", "**Reference**
    **(Samcef)**"



.. csv-table::

    "13. ", "13. ", "1.94328E+00"
    "26. ", "26. ", "3.09814E+00"



notes
---------

The number of cells in the reference solution is 2 times greater than that of the modeling A solution.

We use the value of COEF_RIGI_DRZ = 0.001.

The following figures illustrate the solution obtained with a non-follower and follower pressure. These are the translation components of the middle of the free end.


+-------------------------------------------------------------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------+
|                                                                                                                                                       |                                                                                                                                                   |
+ .. image:: images/1000000000000316000003FE219CEEDF612F363D.png                                                                                        + .. image:: images/1000000000000316000003FEA7044F10381634B8.png                                                                                    +
|    :width: 3.5382in                                                                                                                                   |    :width: 4.0319in                                                                                                                               |
+    :height: 3.0756in                                                                                                                                  +    :height: 2.9055in                                                                                                                              +
|                                                                                                                                                       |                                                                                                                                                   |
+ **Non-tracking pressure**                                                                                                                             + **Follower pressure**                                                                                                                             +
|                                                                                                                                                       |                                                                                                                                                   |
+-------------------------------------------------------------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------+


We can see that in the case of a subsequent pressure, the displacement :math:`\mathit{DZ}` decreases after reaching a maximum. The beam has a tendency to roll up. This phenomenon cannot be represented with unsteady pressures.