Benchmark results
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For model VISC_ISOT_TRAC, which is tested in models A, B and C, validation is carried out by comparison with the results obtained with model ROUSS_VISC, whose parameters were chosen in such a way as to make the evolution of porosity negligible and thus return to the "classical" viscoplastic model.

For model VISC_ISOT_LINE tested in models D, E and F, the solution obtained is compared with VISC_ISOT_TRAC for which linear work hardening has been defined (only the end points of the curve used to validate this model are retained).