Mullins effect for Abaqus

[miguel_roque]

Hello,

I'm trying to model a rubber with the Mullins effect on Abaqus, but i can´t find in the hyperelastic edit material window, the option for the Mullins effect, i find only an option for the hysteresis model.

Can anyone help me with this issue? Thanks in advance!

Best Regards.

[ashu28]

There are two things you can do that I know of:

1. In the input file, use *MULLINS EFFECT,TEST DATA INPUT (or USER) along with *HYPERELASTIC option
2. Write the user subroutine UMULLIN

Hope it helps,

Ashu

[miguel_roque]

Thank you for your reply Ashu.

I've tried to understand how to work with the input file, using the abaqus help, but it's not very explicit. Could you or anyone explain how can i do that, so i can use the Mullin effect? Some guidelines would be helpful.

Best Regards

[miguel_roque]

Thank you Ashu, i've been searching the net and now i understand how to use the input file and the *MULLINS EFFECT parameter :D

Best Regards

[miguel_roque]

Hello to all,

I have a question related to the abaqus fit for the Mullins effect. The test data input are 3 consecutive load/unload cycles, each cycle for a diferent strain level. After the fit, Abaqus gives one curve for each cycle. I have read the discussion at "Analisys of a solid disc with Mullins Effect" at section 3.1.7 of the abaqus example problems manual, but i can't quite understand the meaning of the fit.

My question is the meaning of this curve fit, is this fit for the unload or an average of the entire cycle, or is it something else?

Thank you in advance.
Best regards.

[fcapela]

Hi Miguel!

I would like to configure the mullins effect parameter but I'm facing some problems. Could you please explain me how you did it? Some steps or guidelines?

Thank you very much.
Regards.

[Jorgen]

The MCalibration (http://polymerfem.com/content.php?9-MCalibration)software makes calibrating the Mullins effect parameters a breeze. All you need is load-unload-reload, or cyclic data. The software then automatically find the Mullins parameters.

-Jorgen