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feat: Add FIM coupling for single phase fracture ALM#3961

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feature/npillardou/SinglePhasePoromechanicsConformingFracturesALM-FullyImplicit
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feat: Add FIM coupling for single phase fracture ALM#3961
npillardou wants to merge 1 commit intodevelopfrom
feature/npillardou/SinglePhasePoromechanicsConformingFracturesALM-FullyImplicit

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@npillardou npillardou commented Feb 4, 2026

This PR tries to draft the fully implicit coupling approach for single phase with ALM fracture feature.

Some tests have been performed with this implementation on the inclined fault case with analytical solutions and compared to the sequential iterative method:

Effective stress:
image

A small deviation appears in the displacement X:
image

For hexahedral grid:
Simulation_Results_hexa_fim_seq

For tetrahedral grid:
Simulation_Results_tetra_fim_seq

Further checks and tests are necessary to see the consistency of the method.

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