Mooney-Rivlin material constants

Renovo · September 2017

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 · September 2017

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

Renovo · September 2017

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

DaveStupple · September 2017

The evaluation copy of CurveExpert is pretty useful.

Sergio · September 2017

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 · September 2017

Try GNUPLOT - example

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

Mecway

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Mooney-Rivlin material constants

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