F modeling
==============


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

The characteristics of the modeling are strictly identical to the modeling :math:`E`. Only the mesh differs.


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

An entirely triangular mesh of the plate is produced, which does not conform to the crack, such that certain intersected edges are non-vital.

Volume elements (:math:`\mathrm{DCB}`): 842 TRI3


Tested sizes and results
------------------------------

The start of the calculation requires a few more subdivisions than modeling :math:`E`. Given this difference in subdivision sequences, the results of models :math:`E` and :math:`F` are slightly different compared moment by moment. On the other hand, we can see in the figure that they are superposable. Having proved this correspondence, we therefore take the non-regression reference value as the reference value for non-regression those from modeling :math:`F`.


.. image:: images/10000000000001F20000013F0B9A79187DF6A3CE.png
    :width: 5.1937in
    :height: 3.3256in


.. _RefImage_10000000000001F20000013F0B9A79187DF6A3CE.png:

**Figure** 7.3-a **: Comparison of triangle meshes/conformal mesh**


.. csv-table::

    "**Size tested**", "**Reference type**", "**Code_Aster**", "**Tolerance (** :math:`\text{\%}` **)**) **"
    ":math:`U` at time 50"," NON_REGRESSION ", "3.34481D-03", "0.10"
    ":math:`F` at time 50"," NON_REGRESSION ", "4.26501D+07", "0.10"
    ":math:`U` at time 100"," NON_REGRESSION ", "2.28519D-03", "0.10"
    ":math:`F` at time 100"," NON_REGRESSION ", "4.85041D+06", "0.10"
    ":math:`U` at the moment 150"," NON_REGRESSION ", "6.83775D-03", "0.10"
    ":math:`F` at the moment 150"," NON_REGRESSION ", "6.86061D+06", "0.10"