Feature/oduran/test fem stress consistency #3957

OmarDuran · 2026-02-02T19:00:02Z

This PR adds a new integration test, to verify the consistency of the Finite Element Method implementation in GEOS. The test focuses on stress transmission across fractured domains using the SurfaceGenerator class.

The test ensures that the mechanical solvers preserve stress equilibrium and correctly handle contact/interface conditions across different mesh types and fracture configurations.

The physical setup is a pure compression case with no shear induced by the boundary conditions. As a result, the stress field is constant, which allows for direct verification: for volume elements, the averaged computed stress tensor is checked against the applied boundary tractions, and for fracture surfaces, the traction vector 𝑡 = 𝜎⋅𝑛 is projected from neighboring volume cells onto fracture faces, is computed and verified on both fracture sides against the expected traction.

The figures show (top-left) a structured hexahedral mesh, (top-right) a structured tetrahedral mesh, (bottom-left) a hexahedral mesh with curved fractures, and (bottom-right) a tetrahedral mesh with curved fractures.

Fracture leading orientations:
f1: normal aligned with the x-axis
f2: normal aligned with the y-axis
f3: normal aligned with the z-axis

The test covers all combinations of fractures:

f1 -meshes:

f2 -meshes:

f3 -meshes:

f1-f2 -meshes:

f2-f3 -meshes:

f1-f3 -meshes:

f1-f2-f3 -meshes:

…l surfaceGenerator

Update SolidMechanicsAugmentedLagrangianContact.cpp Update SolidMechanicsAugmentedLagrangianContact.cpp Update SolidMechanicsAugmentedLagrangianContact.cpp Update SolidMechanicsAugmentedLagrangianContact.cpp Update SolidMechanicsAugmentedLagrangianContact.cpp Update SolidMechanicsAugmentedLagrangianContact.cpp Update SolidMechanicsAugmentedLagrangianContact.cpp Update SolidMechanicsAugmentedLagrangianContact.cpp Update SolidMechanicsAugmentedLagrangianContact.cpp wip: solution Update SolidMechanicsAugmentedLagrangianContact.cpp

…event

…allel.

* split out SurfaceElementRegion set update to post split * try to reserve maps in node manager * update LvArray submodule hash

OmarDuran added 25 commits January 15, 2026 15:37

wip: adding initial case

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wip: adding all the combination out of 6 fractures

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wip: update meshes

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Update rc_hex01_norm_nf_lagr_contact.xml

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wip: add meshes

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wip: adding mechanics, fluid and poromechanics cases

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wip: adding cases discussed with RS

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wip: delete old cases

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wip: add non trivial case

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wip: adding initialization for pure mechanical problems using interna…

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…l surfaceGenerator

Merge branch 'develop' into feature/oduran/test_stress_consistency

ff3e12f

test: consistency of constant fluxes (linear displacement solution)

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Update testFEMConsistency.cpp

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Update testFEMConsistency.cpp

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wip: make test faster

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wip: make test faster

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Update testFEMConsistency.cpp

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Update testFEMConsistency.cpp

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Update testFEMConsistency.cpp

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Update testFEMConsistency.cpp

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Update testFEMConsistency.cpp

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Update testFEMConsistency.cpp

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wip: testing distorted meshes

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wip: adding distorted meshes

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Update testFEMConsistency.cpp

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OmarDuran self-assigned this Feb 2, 2026

OmarDuran added 4 commits February 2, 2026 11:01

wip: remove input xml files

a969057

Update GeosxOptions.cmake

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Update testFEMConsistency.cpp

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Update testFEMConsistency.cpp

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OmarDuran added 3 commits February 4, 2026 19:52

Update testMixedDimSinglePhaseFlow.cpp

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Update testMixedDimSinglePhaseFlow.cpp

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Update CMakeLists.txt

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This was linked to issues Feb 6, 2026

Initial Pressure in the Fracture #3909

Open

Adding check and warning message for fracture pressure #2959

Open

OmarDuran and others added 25 commits February 6, 2026 02:01

Update SolidMechanicsAugmentedLagrangianContact.cpp

211d3c7

Update testFEMConsistency.cpp

2ef921d

wip: clean up code part I

c77f5b2

wip: add option to replace displacements

eed9343

Synchronize bubble displacement and add reset_displacements option

1ebb36a

test traction on generated fractures

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testing fracture stress in all the configurations

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wip initialize traction from matrix elements

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wip: refactor traction initialization from bulk stresses.

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wip: report completion for SG.

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update from develop

882eb94

delete duplicated code

eaf5ce4

Parametrization for multiple mpi ranks

d72e2af

balancing test load

e83528d

fix typo in the xml block

d824379

Ensuring stick mode

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add print statements

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add print statements

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adjusting mesh modification stamps for SurfaceGenerator steps as solo…

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…event

remove print statements

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test failure is caused by a race condition when running tests in par…

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…allel.

test failure is caused by a race condition when running tests in par…

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…allel.

run test with direct solver

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fix: address surface generator performance issues (#3968)

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* split out SurfaceElementRegion set update to post split * try to reserve maps in node manager * update LvArray submodule hash