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Ansys - error estimation during hyperelastic curve fit

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Posts: 10
Topic starter
(@weles47)
Active Member
Joined: 12 years ago

Hi all,

I saw in the ansys mechanical technology demonstration, that after doing the curve fitting for a hyperelastic material, they also had an error estimation graph, I tried to figure out how this is done inside Ansys but couldnt find it.

I have experimental data that I am trying to fit, but I have 3 candidate models that I am having trouble to choose from (all look good) and I think maybe the error estimation will give me a better tool to choose from the 3.

Does anyone know how it is done within Ansys?

Thanks.

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Posts: 3998
(@jorgen)
Member
Joined: 5 years ago

I dont recall the steps in Workbench 🙁
I use MCalibration for almost all my material model calibrations. It is a better approach - you should check it out.

What material are you studying?
There is virtually no material that can be accurately modeled using a hyperelastic material model...

-Jorgen

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Posts: 10
Topic starter
(@weles47)
Active Member
Joined: 12 years ago

Hi,

I am studying Viton GFLT 600S.
Why wouldnt the Yeoh, or Ogden model work for this material?

Thanks.

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Posts: 3998
(@jorgen)
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Joined: 5 years ago

You should be able to approximate the response of Viton using the Yeoh or Ogden material models.
The Bergstrom-Boyce model should work better though...

-Jorgen

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Posts: 10
Topic starter
(@weles47)
Active Member
Joined: 12 years ago

Thank you Jorgen

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