D modeling
====




Characteristics of modeling
----

Identical to C modeling, this modeling uses a follower loading, SUIV_PILO instead of FIXE_PILO (load type: PRES_REP instead of FORCE_CONTOUR).

If FIXE_PILO, the load is always fixed (independent of geometry).

If SUIV_PILO, The load is said to be "follower", that is to say, it depends on the value of the unknowns: for example, pressure, being a loading that applies in the normal direction to a structure, depends on the updated geometry of the structure, and therefore on the displacements.




Characteristics of the mesh
----

We use the same mesh as the C modeling, which includes 315 TRIA6 and 686 nodes.




Tested sizes and results
----

The value of the limit load for the elastoplastic calculation without control is tested, in relation to the analytical solution of the minimum limit:


.. csv-table::

    "**Component**", "**Reference Type**", "**Value**", "**Tolerance**"
    "SIGM_NOEU — :math:`\mathit{SIYY}` in :math:`G` "," ANALYTIQUE "," :math:`243\mathit{MPa}` "," 1.00%"


We test the value of the limit load for the elastoplastic calculation with control (imposed vertical displacement of :math:`\mathrm{6mm}` at the point :math:`G`), compared to the analytical solution of the minimum limit of the solution without control:


.. csv-table::

    "**Component**", "**Reference Type**", "**Value**", "**Tolerance**"
    "SIGM_NOEU — :math:`\mathit{SIYY}` in :math:`G` "," ANALYTIQUE "," :math:`243\mathit{MPa}` "," 1.00%"
    "SIGM_NOEU — :math:`\mathit{SIYY}` in :math:`G` "," AUTRE_ASTER "," :math:`243.05\mathit{MPa}` "," 0.30%"
    "ETA_PILOTAGEen INST =6"," ANALYTIQUE "," :math:`246\mathit{MPa}` "," 1.00%"