What is the correct way to evaluate flow stress on a fully defined in_profile?

[GRPlan]

I would have assumed that
Rod.flow_stress_function(.1 , 1 , 1473)
would return the flow stress value for the given triple (strain, strain_rate, temperature)...

But I get an AttributeError: Hook call for 'flow_stress_function' on 'BoxProfile' could not provide a value.

Rod.flow_stress(Rod.freiberg_flow_stress_coefficients, .1,1,1473) also yields an
AttributeError: Hook call for 'flow_stress' on 'BoxProfile' could not provide a value.

What is it that I do not understand correctly?

What is the correct way to evaluate the defined flow stress?

Kind regards

[ChRen95]

Hi @GRPlan,

So, flow_stress as well as flow_stress_function are defined as hooks for Deformation.Profile.
A DeformationUnit is a RollPass or a DiskElement so the correct way to use it, is to either solve a sequence and then use the function on e.g. sequence[0].out_profile.flow_stress_function or to directly import the function from pyroll-freiberg-flow-stress and then use it. Since I don't know your use case I can't tell you what's best.

[GRPlan]

Thank you for answering my question.

I still think that it would be more intuitive to evaluate the flow stress as a property of the in_profile once it is properly defined.
But let's discuss this some other time...