B modeling
==============


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

**Modeling:** **COQUE_3Dpour test the contact between two plates.**


.. image:: images/1000053E000069D50000353AA18180B0F2382321.svg
    :width: 439
    :height: 220


.. _RefImage_1000053E000069D50000353AA18180B0F2382321.svg:

where :math:`\text{*}` refers to the middle node of the plate.

:math:`A=\mathrm{DR1}` or :math:`\mathrm{DR21}`,

:math:`B=\mathrm{DR2}` or :math:`\mathrm{DR22}`,

:math:`C=\mathrm{DR3}` or :math:`\mathrm{DR23}`,

:math:`D=\mathrm{DR4}` or :math:`\mathrm{DR24}`.

The nodes on which the boundary conditions are applied are the nodes named :math:`\mathrm{cente1}` and :math:`\mathrm{cente2}` located at the center of each plate.


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

Use of meshes QUAD9


Tested values
---------------


.. csv-table::

    "**Central Node Identification**", "**Analytic**"
    ":math:`\mathrm{DZ}` ", "-3.426875 E-01"
    ":math:`{\sigma }_{\mathrm{yy}}` ", "+7.6481 E+09"



Comments
------------

The results obtained with contact are acceptable since an error of the same order of magnitude is obtained as those without contact with a single plate twice as thick.