feat: Add Young Modulus & Poisson import from VTK mesh

[npillardou]

This feature adds register data fields for Poisson's ratio and Young Modulus directly from VTK mesh, avoiding any external conversion operations.

It also offers the possibility to obtain them as output by adding (according to user needs) :

<Outputs> <VTK name="vtkOutput" fieldNames="{ rock_youngModulus, rock_poissonRatio }" /> </Outputs>

[jhuang2601]

For most common materials, Poisson’s ratio falls within the range of 0 to 0.5.

[npillardou]

I agree with you, but there was some checks already done around line 80-84 that were with this range :

  if( nu > -0.5 && nu < 0.5 )
  {
    ++numConstantsSpecified;
    errorCheck += "nu, ";
  }

So I kept them as it is.

[dkachuma]

My understanding of (nu, E, K and G) is that we need only 2 of these. What combinations are currently supported. Currently you can provide K and G. You're proposing nu and E I suppose, but can we do any other combinations. Maybe just add a note in the documentation. For example what happens if the user tries to load K and E?

[Copilot]

Pull request overview

This PR adds support for importing per-cell Young’s modulus and Poisson’s ratio from an external VTK mesh into the solid constitutive data, converting those imported values into bulk/shear moduli during initialization, and enabling optional output of the imported/derived fields.

Changes:

• Extend the schema to allow youngModulus and poissonRatio fields on multiple solid constitutive model types.
• Add new solid field traits (youngModulus, poissonRatio) and register/initialize them in ElasticIsotropic with per-cell E/ν → K/G conversion.
• Update integrated test baseline references to reflect the new capability.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/coreComponents/schema/schema.xsd.other	Allows youngModulus/poissonRatio attributes for relevant constitutive types in the schema.
src/coreComponents/constitutive/solid/SolidFields.hpp	Defines new solid field traits for youngModulus and poissonRatio.
src/coreComponents/constitutive/solid/ElasticIsotropic.hpp	Declares new per-cell storage and initialization hook for conversion.
src/coreComponents/constitutive/solid/ElasticIsotropic.cpp	Registers new fields and implements MPI-aggregated per-cell conversion logic + back-computation for output.
BASELINE_NOTES.md	Records baseline update rationale for the PR.
.integrated_tests.yaml	Updates the integrated test baseline ID to the PR’s baseline artifact.

[Copilot]

The per-cell conversion treats any in-range poissonRatio value as “imported”. Since the field default is currently 0.0 (a valid Poisson’s ratio), importing only youngModulus (or failing to import poissonRatio for some cells) will silently convert using ν=0.0, producing incorrect bulk/shear moduli. Use an unambiguously invalid sentinel default for poissonRatio (e.g., 0.5 or 1.0), and/or add an explicit check to ensure ν was actually imported before converting.

[Copilot]

New per-cell E/ν import/conversion logic isn’t covered by existing ElasticIsotropic unit tests (they currently validate allocation and constant-K/G stress updates). Adding a unit test that sets per-cell youngModulus/poissonRatio (including invalid/missing values) and verifies the resulting bulk/shear (and back-computed E/ν) would help prevent regressions.