Defining invariance dependent material properties

[rnpratoori]

Hello,

I am working on a reaction-diffusion model combined with mechanics. I want to define the diffusion or reaction properties as a function of stress invariant. Are there easy ways to extract the invariants and couple them with the material properties?

Here is the current version of the input file I developed which has both reaction-diffusion and mechanics, but decoupled - https://github.com/rnpratoori/phoenix/blob/main/problems/pstvm.i.

[GiudGiud]

Hello

what are the names of the invariants?
If you use

[Debug]
  show_material_props = true

you should see all the names of the properties that are already created and that should be easy to couple to using the material property getters from the MaterialPropertyInteface

[rnpratoori]

Currenty, I am thinking of the first invariant of pk1_stress. I find that pk1_stress is already created from the debug output.
Is there an example or documentation you can point me to where the MaterialPropertyInterface is used? I do not find it in the source index.

[GiudGiud]

you can grep in the code for getMaterialProperty
see the MatDiffusionKernel for example