Mooney-Rivlin material constants

Renovo

I am looking for recommendations for curve fitting software to determine Mooney-Rivlin material constants for incompressible and nearly incompressible materials. I have looked into software called Hyperfit that appears to do everything I need, however it's relatively expensive and the license is only available for a limited time. Any help would be greatly appreciated.

Sergio

Try Optimax, is free and ready to use with CalculiX.

Renovo

Hi Sergio, thank you and I will give that a try.

DaveStupple

The evaluation copy of CurveExpert is pretty useful.

Sergio

In fact Optimax is different from what you ask for, because is not just curve fitting but it will drive CalculiX (or other solvers) to find the adecuate material coeficients to match a reference curve performing several calculations. I have used for rubber (Mooney Rivling and Neo Hooke) and was very usefull.

3rav

Try GNUPLOT - example

Equations from https://www.code-aster.org/forum2/viewtopic.php?id=13908