R modeling
==============

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

**Mixed Mode** :math:`I` **,** :math:`\mathrm{II}` **,** :math:`\mathrm{III}`

We only do non-regression tests, by mixing the loading modes. The same load is applied as in P modeling, but the load in the third direction is added.