v6.07.112 COMP012 — Validation of the CALC_ESSAI_GEOMECA macro-command with several laws of behavior#

Summary:

The objective of this test is to validate the macro command CALC_ESSAI_GEOMECA [U4.90.21] which makes it possible to simulate at the hardware point eight types of loading paths characteristic of geomechanical tests:

  • Monotonous drained triaxial test with imposed displacement.

  • Undrained monotonic triaxial test with imposed displacement.

  • Undrained cyclic triaxial test at imposed force.

  • Drained alternating cyclic triaxial test with imposed displacement.

  • Non-alternating cyclic triaxial test drained with imposed displacement.

  • Drained cyclic shear test with imposed deformation.

  • Force-imposed drained cyclic oedometric test.

  • Isotropic cyclic compression test drained at imposed force.

  • Undrained cyclic triaxial test with imposed displacement.

In modeling A, these nine tests are simulated with Hujeux’s law. For the first three tests, the calculated solutions are compared to the results. from Finite Element Code GEFDYN from Centrale Supélec. For the next five tests, the solutions calculated after version 14.2 of the Code_Aster (for which a redesign of the macro-command was carried out) are compared to the solutions calculated before this version. For test ESSAI_ISOT_DR_C_F, the calculated solutions are compared to those of the ssnv204a test case. Finally, for the last test, the solutions are checked by non-regression tests.

In modeling B, a drained monotonic triaxial test with imposed displacement is simulated with law MOHR_COULOMB. The solution is compared to an analytical solution.

In modeling C, an undrained cyclic triaxial test with imposed force is simulated on sand modelled with Hujeux’s law. It makes it possible to validate the detection of the instability specific to this test and the transition of the test to controlled deformation.

In modeling D, a drained cyclic shear test with Iwan’s law is simulated.

In modeling E, a triaxial cyclic non-drained test with imposed force is simulated on the same sand as modeling C and modeled with Hujeux’s law. It makes it possible to test the intersections of the new liquefaction criteria and to illustrate the use of new keywords introduced by the redesign of the macro-command in Code_Aster version 14.2.

In the F modeling, a drained monotonic triaxial test with imposed displacement is simulated with the MohrCoulombas law. The solution is compared to an analytical solution.

In G modeling, a drained monotonic triaxial test with imposed displacement is simulated with law NLH_CSRM. A non-regression test validates the robustness of the model.

In H modeling, a drained monotonic triaxial test with imposed displacement is simulated with law MCC. A non-regression test validates the robustness of the model.

In modeling I, several drained cyclic shear tests with imposed deformations are simulated with law CSSM.