Forcing Eigenstrain Materials to Ignore Initial Order Parameter Value.

[Supernova963]

Hello,

For my model I need to include volumetric strain between a substrate and its oxide which is controlled via an order parameter. Currently I have an initial oxide thickness that should have 0 volumetric strain in terms of the simulations initial condition. When I use the ComputeVolumetricEigenstrain material, at the first timestep the strain explodes as the oxide rapidly expands to match its order parameter value.

Is there a built in method having the material ignore the initial value of the order parameter and only have it affect the strain as the oxide grows?

Thank you.

[GiudGiud]

@tophmatthews would you know?