v7.31.129 WTNV129 - Undrained triaxial test with the Hoek-Brown model modified to total stresses

Summary

This test makes it possible to validate the Hoek-Brown elasto-plastic behavior law modified in total stresses, i.e. HOEK_BROWN_TOT with hydraulic coupling. It is a triaxial test under undrained conditions. The undrained aspect is modelled by zero volume deformation of the skeleton and hydraulic coupling is taken into account. The sample is completely saturated, the skeleton and the fluid being assumed to be incompressible.

For reasons of symmetry, only one eighth of a sample subjected to a triaxial test is considered.

The lockdown level applied is \(5\mathit{MPa}\).

It is a non-regression test.

Modeling A is a 3D_HM model with integration at Gauss points.

B modeling is a 3D model_ HMS with integration at Gauss points or at nodes (see doc [R7.01.10]).

• 1. Reference problem
  • 1.1. Geometry
  • 1.2. Material properties
  • 1.3. Initial conditions, limits and loading
• 2. Modeling A
  • 2.1. Characteristics of modeling
  • 2.2. Characteristics of the mesh
  • 2.3. Tested sizes and results
• 3. B modeling
  • 3.1. Characteristics of modeling
  • 3.2. Characteristics of the mesh
  • 3.3. Tested sizes and results
• 4. Summary of results