Isotropic hardening leads to a very large elastic region, on reversed loading, whihc is often not what would be seaen in experiments. in fact. a much smaller elastic region is expected and this results from what is often called Baushinger effect, and kinematic hardening. in Kinematic hardening, the yield surface translates in stress space, rather than expanding (isotrpic hardening model).
Baushinger effect
Isotropic hardening leads to a very large elastic region, on reversed loading, whihc is often not what would be seaen in experiments. in fact. a much smaller elastic region is expected and this results from what is often called Baushinger effect, and kinematic hardening. in Kinematic hardening, the yield surface translates in stress space, rather than expanding (isotrpic hardening model).
Regards,
MHH