14. Summary of results

These are non-regression tests developed to validate the LETK model in pure mechanics. The comparison between the two integration schemes makes it possible to identify certain trends in convergence profiles.

An explicit integration diagram allows for a fine discretization of the load to guarantee converged results and less machine execution time than the implicit schema. On the other hand, it is difficult to quantify the level of fineness of the load to be applied in order to guarantee the convergence of studies with an explicit integration scheme.

The implicit integration schema guarantees a higher level of precision than the explicit schema for the same load discretization. It also makes it possible to have a consistent local tangent operator. These advantages thus ensure convergence on the results obtained with the implicit schema over a wide range of load discretizations.

The following figures illustrate the previous arguments.

Figure 1: Maximum lateral displacement of the laboratory sample during a triaxial compression test as a function of the loading discretization level

Figure 2: Cumulative time CPU for the triaxial compression test as a function of the load discretization level