G modeling
==============


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

Simulation at the hardware point. The objective is to validate the compatibility of CALC_ESSAI_GEOMECA with the NLH_CSRM law. To do this, a monotonous drained triaxial test with imposed displacement ESSAI_TRIA_DR_M_D is carried out. The number of time steps is 200; the confinement pressure is :math:`{\mathrm{\sigma }}_{0}=5\mathit{MPa}`; the maximum axial deformation is equal to :math:`{\mathrm{ϵ}}_{\mathit{zz}}^{\mathit{max}}=2\text{\%}`. The convergence criterion is 10-10.

The material parameters, given in the International System, are:


* youngModulus=7.0e9


* Fish ratio = 0.3


* Isocomplaslim=50.0E6


* Isotenselaslim=0.1E6


* MCCSlopeCSL =0.5


* NLHIndex =1.0


* mbigocritCoef=10.0


* abigocritCoef=0.75


* incompIndex=15.0


* Rau=2.0e2


* PerzynaExpo=2.0


* NLHModulusP =7.0e9/2.5


*NLHModulusV =0.01*7.0e9


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

Two non-regression tests are carried out at the end of the test on components SIG_LAT (lateral stress, SIXX or SIYY) and SIG_AXI (axial stress, SIZZ) components.


.. csv-table::

    ":math:`t=30\mathit{sec}` "," NLH_CSRM"
    "SIG_AXI (:math:`{\mathrm{\sigma }}_{\mathit{zz}}`, Pa)", "5.0e6"
    "SIG_LAT (:math:`{\mathrm{\sigma }}_{\mathit{xx}}={\mathrm{\sigma }}_{\mathit{yy}}`, Pa)", "27433365.80434943"


Table 12.2-1: Validation of results for G modeling