L modeling
==============

Validation of the interface element PENTA15 with the cohesive law for fatigue CZM_FAT_MIX in open mode. The loading here is cyclical (see :ref:`5 <RefHeading__31154616>`) in a jagged pattern. The odd times are the peaks and the even times correspond to the troughs.


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

3D modeling for the elastic element.

3D modeling_ INTERFACE_S for the interface element


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

Number of knots: 24

The elastic element is a PENTA15.

The interface element is a degenerate PENTA15 (nodes combined).


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

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

The quantities tested and the results are identical to those obtained in :math:`\mathrm{2D}` (see modeling J paragraph :ref:`12.3 <12-4>`).


.. csv-table::

    "**Size tested**", "**Reference**", "**Tolerance (** :math:`\text{\%}` **)**"
    "SIXXinst. 3", "6.05826", "0.10"
    "SIGN (SIEF_ELGA) inst.9", "1.45221", "0.10"
    "SIGN (DEPL) inst.9", "1.45221", "0.10"
    "SITX (SIEF_ELGA) inst.7", "0.0", "0.10"
    "V1 inst.3", "2.04959E-02", "0.10"
    "V4 inst.3", "1.94457E-01", "0.10"