C modeling
==============

Validation of the 3D joint with law JOINT_MECA_RUPT


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

3D modeling for the elastic element.

3D modeling_ JOINT for the joint element


Characteristics of the mesh
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Number of knots: 9

The elastic element is a PENTA6.

The joint element is a degenerate PENTA6 (knots combined).


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

**Modes** :math:`I` **and** :math:`\mathrm{II}`

Identical to modeling A. We just note that :math:`\mathit{FN}\mathrm{=}\mathit{SIGN}\mathrm{/}2`, because the contact area is equal to :math:`1/2`.

**Fashion** :math:`\mathrm{III}`

The joint is opened in :math:`I` mode until partial damage occurs, then it is stressed in :math:`\mathrm{III}` mode. Tangential stiffness slopes are tested at two values of normal apertures.