Meaning of parameters for "Generalized Maxwell Model" in Ansys 1

[oij]

Can anybody help me. I am not able to figure out what values should I put for the table of constants in Generalized Maxwell Model of Viscoelasticity in Ansys.

It goes like this:
C11 ... C22
.
.
.
What do all those C's mean????
Thanks.

 

[Drej]

Which viscoelastic model are you using? Is it the TB,PRONY TB,HYPER or TB,SHIFT? What material/behaviour are you trying to model? C11, C22... Cnn are the "constants" used in the equations of viscoelastic behaviour - used in the curve fitting of the experimental data.