U modeling
==============

Validation of the implementation of law CZM_LIN_MIX in formulation X- FEM. We are testing the opening mode. This modeling is identical to modeling :math:`T`, but in plane deformations (D_ PLAN) instead of plane stresses (C_ PLAN).


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

Strictly identical to modeling :math:`T`, except that the surface elements are of type D_ PLAN.


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

The square is discretized at the rate of :math:`4` elements per side. Therefore:

Number of elements, type HEXA4: 16

Number of knots: 65.


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

The quantities tested are rigorously the same as in modeling :math:`T`, and are therefore obtained by the same calculations, according to the explanations in part :ref:`2.2 <RefNumPara__4776_1148470081>`.

**Fashion** :math:`I`


.. csv-table::

    "**Size tested**", "**No time**", "**Reference**", "**Tolerance (** :math:`\text{\%}` **)**"
    "DX on node 2", "4", "1.71003596", "0.10"
    "ETA_PILO ", "4", "7.898168291D-01", "0.10"
    "SIXXsur mesh 32", "2", "6.599934D-01", "0.10"
    "LAGS_Csur node 9", "9", "1.099989D-01", "0.10"
    "LAGS_F1sur node 9", "8", "0.D+00", "0.10"