It appears that there are some problems in the current viscoelastic model (ANSYS v.61-v8.1), that could be confusing to ANSYS users. (1) For TB,Prony input, the data can be entered at different temperatures. I believe that the Prony constants are a function of reference temperature instead of temperature. Because, under each reference, the Prony pairs are obtained based on the master curve which is generated by time-temperature superposition based on modulus-frequency curves at different temperature. Therefore, Prony pairs has already considered different temperature. Why does the design of the Prony Table include different temperature again? I believe that will certainly confuse users. (2) For the Shift function, there should be only one group C1, C2 and Tref input. However, if you use a different Tref, the C1, C2 should be different and should generate a shift factor A(T) that is quite different. What is the significance of a different Tref?

Material Properties