Using MCalibration to get BB model constants

[h_sadeghy]

Hi,

I am using MCalibration software to calibrate the BB model for our elastomer. I have two sets of uniaxial compression test data with different strain rates for this purpose. The calibration, as I was expecting, depends on the initial values of constant. I have tried changing the parameters manually to get the prediction closer to the test data, however the software calibration does not give me a good fit for the manually manipulated initial values.

I would like to know if there is any rule of thumb for initial values for the uniaxial tests.

Thank you,

[Jorgen]

In my experience, MCalibration is very good at find the necessary parameter for the BB-model.

I am happy to share some rules of thumb about what the parameters typically are, but I think it might be even more useful if I could demonstrate the calibration procedure for you.
Can you post your two experimental data files?

-Jorgen

[h_sadeghy]

Hello Jorgen,

I sent you an email a couple days ago and attached the data files. Let me know how they look!

Thank you,
Hossein

[newbeetle]

Hello Jorgen,

I sent you an email a couple days ago and attached the data files. Let me know how they look!

Thank you,
Hossein

Dear Hossein,
did you solve your issue? I have a similar problem. Would you please share with us how you solved it?
Berkan