N modeling
==============

Validation of joint :math:`\mathrm{3D}` in quadratic with the JOINT_MECA_RUPT law


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

3D modeling for the elastic element.

3D modeling_ JOINT for the joint element


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

Number of knots: 32

The elastic element is a HEXA20.

The joint element is a degenerate HEXA20 (knots combined).


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

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

Identical to the M modeling.

**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.