Neo-Hookean

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Neo-Hookean

The Neo-Hookean material model is described in terms of the strain energy potential, W, as follows:

where

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

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:

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.