Neo-Hookean
The Neo-Hookean material model is described in terms of the strain energy potential, W, as follows:
where 
and 
are material constants.
and are material constants.You can use materials constants to calculate the initial shear modulus as follows:
You can also calculate initial bulk modulus for the material as follows:
When you select Neo-Hookean material model to define the hyperelastic material, you must specify values for and .
and .For materials that are nearly incompressible, Creo Simulate uses incompressibility conditions. If the specified value of is less than
, Creo Simulate uses following value of during analysis:
is less than, Creo Simulate uses following value of during analysis:=.where G is the initial shear modulus.
Creo Simulate calculates these constants when you select Neo-Hookean material model on the Hyperelastic Material Definition dialog box.
Return to About Material Models.