The image above is from R2025x. In the R2025x version of the Material Calibration App, it is not possible to select to use a volumetric test dataset for the Marlow model or for the Valanis-Landel model.
A new feature has been added in R2026x FD01 to allow the use of a volumetric test dataset for Marlow and Valanis-Landel models. This new feature is only applicable in Numerical and FE modes.
The image below is from R2026x FD01 and shows the Marlow model in Numerical mode. Notice the plot in the lower right shows that the Marlow model matches the volumetric data exactly.
The image below is from R2026x FD01 an shows the Valanis-Landel model in Numerical mode. Notice the plot in the lower right shows that the Valanis-Landel model matches the volumetric data exactly.
The four elastomer test datasets shown above can be found here:
Elastomer Class Data - hyperelastic+volumetric
