The image above is the test data (red dots) and a calibrated response (black line) using the "Combined Exponential" elastic-plastic material model.  Combined means it is a combination of isotropic and kinematic hardening.  The isotropic part is described using the "Exponential" equational form and the kinematic part uses a nonlinear kinematic hardening using 1 back-stress.

Here is the test data in an Excel file. 

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