Introduction to mcalibration "Stress relaxation Check"
Hello, I performed the introduction to mcalibration calibrating a TN model following the instructions from the link.
I saw the prediction for stress relaxation and wanted to check it performing an Ansys simulation, I didnt get the Stress relaxation response of the material in the simulation. Maybe I made a mistake, so I tried replacing the TN material data for an hiperelastic + prony series to check the stress relaxation of the element, getting the desired response for H+P but not for TN model.
i tried performing the TN model with t = 60 and t = 120 simulations but saw 0 relaxation response.
Your image seems to indicate stress relaxation. Can you explain more about the problem?
Yes, the image predicts stress relaxation, I tried to check it with an Ansys simulation, exported the material as xml and asigned the material to a geometry to test it. It didnt show any relaxation. To check if everything else was ok, I tried with a hiperelastic + prony series and got the expected stress relaxation. So the only diference between the 2 simulations was the material.
I know it is a vague way to ask, but any clue of what could be wrong?
I downloaded the archive "Ansys_Seal_RigidSteel.wbpz"from https://polymerfem.com/how-to-simulate-a-teflon-seal-using-ansys/ and first tried the Hiperelastic + prony from Ansys and got positive stress relaxation.
then I tried a TN model with the following parameters
but no stress relaxation was apreciable.
Is that the same TN model that I used? If not, and you want me to investigate, send the wbpz file.
I send you a link to the archive, .wbpz are not allowed in "Attach Files".
Also I add the Mcalibration file.
The data used for the TN model is from.
Thank you for your time.
I solved the problem.
I just downloaded the PolyUmod library and install it. Then all the simulations started working showing the viscoelastic response.
In conclusion, Mcalibration doesnt work as a standalone.