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[FAQ]

The issue is that TNM is unlike other conventional material models that use an Additive Decomposition formulation (elastic + plastic + creep). With TNM, viscoelastic and plastic components are tightly coupled. Hence, there is actually no distinct elastic or plastic strain that can be post processed. In Section 4.6.12.1.3 of the R2021-R2 Material Reference Guide, we document that for TNM, true total strain is stored as elastic strain EPEL and accumulated viscoplastic strain is stored as accumulated plastic strain EPEQ. Elastic and Viscoplastic dissipated energies are stored as elastic and plastic strain energies, respectively.