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Neo-Hookean Hyperelasticity constants

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Posts: 3
Topic starter
(@Rincewind8)
New Member
Joined: 15 years ago

I want to use your given material parameter for linear viscoelaticity model based on Neo-Hookean Hyperelasticity and a 3-term Prony series in Abaqus, but i have no idea about their units and names for eleven numbers (1.855,500,....,1e-3).

please have some extended notes about them and explain where i must use these constant in software.

tnx

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Posts: 3998
(@jorgen)
Member
Joined: 4 years ago

Can you provide a more detailed explanation and link to what parameter set you are interested in?

-Jorgen

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Posts: 3
Topic starter
(@Rincewind8)
New Member
Joined: 15 years ago

tanks for your consideration.

[url] https://polymerfem.com/index.php?pageid=mat_mod&material=1 [/url]

please see the third model: Predictions from a linear viscoelaticity model based on Neo-Hookean Hyperelasticity and a 3-term Prony series.

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Posts: 3998
(@jorgen)
Member
Joined: 4 years ago

The order of the parameters is:

1. mu (shear modulus of neo-hookean model)
2. kappa (bulk modulus of neo-hookean model)
3. tau0 (relaxation time 0)
4. g_shear0 (normalized shear relaxation 0)
5. g_vol0 (normalized volume relaxation 0)
6. tau1 (Prony series terms 2)
7. g_shear1
8. g_vol1
9. tau2 (Prony series terms 3)
10. g_shear2
11. g_vol2

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Posts: 16
(@Baldwin)
Active Member
Joined: 9 years ago

Hi every body....
I have a simple doubt. Can you say what is alpha here? I know gi, ki and tau (to fed in Abaqus viscoelastic property). But what is alpha hera? Please relate them with the three parameters.
This equation is for one term prony series shear modulus.
Thanks and Regards

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