I am trying to implement the Yoshida-Uemori kinematic hardening model in Abaqus. Unfortunately, I cannot figure out how to handle the the non-isotropic hardening surface in the stress-integration. Does anybody know where I could find an algorithm for the integration of this model?
Ghaei and Green have written articles on the explicit and implicit integration of this model, but the papers are not very clear about the non-IH surface.
I do not know this model, but you can see the following references for the integration of an elastoplastic model with isotropic and kinematic hardening
Oh, I was just informed by a colleague that the doctoral thesis of Abbas Ghaei contains an algorithm for the integration of this model. I have attached the two pages.
The algorithm is less sophisticated than what I expected. It looks like basic backward-Euler, there is just one extra loop that switches the isotropic hardening of the bounding surface on/off.
Ashtonishing. I was expecting something more elaborate.
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