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Faulty material models for shells compared to solid #678

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FabienPean-Virtonomy opened this issue Oct 16, 2024 · 0 comments
Open

Faulty material models for shells compared to solid #678

FabienPean-Virtonomy opened this issue Oct 16, 2024 · 0 comments

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@FabienPean-Virtonomy
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FabienPean-Virtonomy commented Oct 16, 2024

See #676

Material models implementation are incorrect and yielding different results whether used as shell or solid.

For all those material models, we currently have the invariant $\mathbf{F}\mathbf{S}\mathbf{F}^T/J = \boldsymbol\sigma$ violated

[ctest] sphinxsys_upstream/tests/unit_tests_src/shared/test_materials/test_materials.cpp:25: Failure
[ctest] Value of: sanity_check(SPH::LinearElasticSolid{1, E, nu})
[ctest]   Actual: false
[ctest] Expected: true
[ctest] sphinxsys_upstream/tests/unit_tests_src/shared/test_materials/test_materials.cpp:26: Failure
[ctest] Value of: sanity_check(SPH::SaintVenantKirchhoffSolid{1, E, nu})
[ctest]   Actual: false
[ctest] Expected: true
[ctest] sphinxsys_upstream/tests/unit_tests_src/shared/test_materials/test_materials.cpp:27: Failure
[ctest] Value of: sanity_check(SPH::NeoHookeanSolidIncompressible{1, E, nu})
[ctest]   Actual: false
[ctest] Expected: true
[ctest] sphinxsys_upstream/tests/unit_tests_src/shared/test_materials/test_materials.cpp:28: Failure
[ctest] Value of: sanity_check(SPH::NeoHookeanSolid{1, E, nu})
[ctest]   Actual: false
[ctest] Expected: true

Fix for Saint Venant-Kirchhoff model #677

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