John Doyle
Ansys Employee

If you want to curve fit the ogden model, you should enter your uniaxial tension data as 'Uniaxial Test Data'.  You should convert uniaxial compression data to 'Biaxial Test Data'.  The Shear Test Data should be planar shear, not simple.

Uniaxial Tension, Uniaxial Compression and Simple Shear data are typically used directly with the Response Function (not curve fitting the hyperelastic strain energy density functions).

Refer also to Chapters 4 and 6 of the MAPDL Material Reference Manual for more details on preparing test data for curve fitting hyperelastic models.