I am working on my bachelor`s thesis, in which I need to develop a material model for a fiber-reinforced composite. Since the project uses only UD-Prepregs, I have adopted a transversely isotropic elastic formulation. In order to characterize not only the initial (time-independent) material properties but also the elastic response in the dynamic range, I would like to augment this model with a viscoelastic contribution.

Specifically, I plan to determine the complex moduli E1* E2* and G12* over a range of frequencies and then represent them via a Prony-series expansion. My question is: What options are available for implementing a transversely isotropic viscoelastic material model in 3DEXPERIENCE?

I am using 3DEXPERIENCE on Cloud as a student, and within the SIMULIA Material Definition App I have not found a direct way to extend a transversely isotropic elastic model with viscoelastic behavior. Perhaps I have overlooked something. Any guidance or pointers would be greatly appreciated.