Introduction to mcalibration "Stress relaxation Check"

Your image seems to indicate stress relaxation. Can you explain more about the problem?

/Jorgen

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?

Best regards.

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.

/Jorgen

I send you a link to the archive, .wbpz are not allowed in "Attach Files".

https://drive.google.com/file/d/1a-ttG1HkZlRbj4j68O9Q7r5xgEjyuA9e/view?usp=sharing

Also I add the Mcalibration file.

https://drive.google.com/file/d/1_d7VpDi-xdC2ubswBU1YlPdUnRSjjdqG/view?usp=sharing

The data used for the TN model is from.

https://polymerfem.com/introduction-to-mcalibration/

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.