How can I check plastic deformation angle of the member?

[gookki]

It's a matter of my lack of knowledge... I don't know how to check the plastic deformation angle through the analysis results.
I used rectangular fiber section. I thought about looking at theta of section deformation, but the value seems to be too small compared to the generated displacement, so I'm worried about what to check the angle.

[marafini.f]

You can try and use the custom record in the recorder called plasticDeformation
We have never used it in an application, we tried to test it but the results are a bit weird.
You can have a try and see if you can interpret them straightforwardly.

Let us know how it goes.
Francesca