Q modeling
==============

Validation of the interface element HEXA8 with the cohesive laws CZM_EXP_MIX in open mode.


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

D_ PLAN modeling for the elastic element.

Modeling PLAN_INTERFACE_S for the interface element


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

Number of knots: 12

The elastic element is a HEXA8.

The interface element is a degenerate HEXA8 (nodes combined).


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

The remark on control mentioned for modeling A also applies to this modeling.

We check the analytical expression of the displacement as a function of the force imposed as well as the resulting constraints and internal variables for a percentage of energy dissipated of 0.3

**Fashion** :math:`I`


.. csv-table::

    "**Size tested**", "**Reference**", "**Tolerance (** :math:`\text{\%}` **)**"
    "DXsur Node 2", "1.5D-00", "0.10"
    "SIXX ", "4.89D-01", "0.10"
    "SIGN ", "6.52D-01", "0.10"
    "SITX ", "0.D+00", "0.10"
    "V1", "4.276D-01", "0.10"
    "V4", "7.D-01", "0.10"