12. G modeling#

12.1. 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 \({\mathrm{\sigma }}_{0}=5\mathit{MPa}\); the maximum axial deformation is equal to \({\mathrm{ϵ}}_{\mathit{zz}}^{\mathit{max}}=2\text{\%}\). 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

12.2. 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.

\(t=30\mathit{sec}\)

NLH_CSRM

SIG_AXI (\({\mathrm{\sigma }}_{\mathit{zz}}\), Pa)

5.0e6

SIG_LAT (\({\mathrm{\sigma }}_{\mathit{xx}}={\mathrm{\sigma }}_{\mathit{yy}}\), Pa)

27433365.80434943

Table 12.2-1: Validation of results for G modeling