{"id":166429,"date":"2023-03-17T13:11:51","date_gmt":"2023-03-17T13:11:51","guid":{"rendered":"\/knowledge\/forums\/topic\/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-tbprony-input-the-data-can-be-entered-at-different-tem\/"},"modified":"2023-07-31T12:31:48","modified_gmt":"2023-07-31T12:31:48","slug":"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-tbprony-input-the-data-can-be-entered-at-different-tem","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/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-tbprony-input-the-data-can-be-entered-at-different-tem\/","title":{"rendered":"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?"},"content":{"rendered":"
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