.. _U3.14.01:

**u3.14.01** Mechanical 3D and 3D_SI models
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**Summary:**

This document describes for 3D and 3D_SI mechanical models:


* the degrees of freedom carried by the finite elements that support modeling,


* the related support meshes,


* the loads supported,


* non-linear possibilities,


* test cases implementing modeling.

3D and 3D_SI models (phenomenon MECANIQUE) correspond to finite elements whose support meshes are volume.

The suffix _SI stands for Sub-Integrated: the integration of terms relating to the laws of behavior is done in a reduced way (Gauss point scheme of lower order than full integration modeling).


.. toctree::
    :hidden:

    self

.. toctree::
    :maxdepth: 2
    :numbered:

    Discr_tisation
    Chargements_support_s
    Possibilit_s_non-lin_aires
    Exemples_de_mise_en__uvre___cas-tests