Modeling
=============

The objective of this modeling is to model a non-regression calculation for a single relative humidity (HR = 0.805).


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


* Modeling in D_ PLAN_THH2MS and D_ PLAN_THH2MD.


* 700 :math:`\mathit{QUAD}8` elements.


* Discretization in time: 1 time step for a total calculation time of 3600s.


Modeling result
----------------------------

The constraints field 'SIEF_NOEU' is calculated to be able to recover the effective constraint in the X direction ('SIXX') on any node (here the N2 node) and for the final moment.

The values of 'SIXX' are compared to the analytical value :math:`-d{\mathrm{\sigma }}_{p}` for HR=0.805 presented in section 2.2 and are shown in the table below.


.. csv-table::

    "HR tested", ":math:`-d{\mathrm{\sigma }}_{p}` (Mpa)
    (analytics)", "SIXX
    (MPa)", ":math:`(\text{\%})` gap"
    "0.805", "-7.950", "-7.258", "8.7"


Table 2.2-1- Effective stress comparison