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[Jan Stránský <question285260@xxxxxxxxxxxxxxxxxxxxx>]

Question #285260 on Yade changed:
https://answers.launchpad.net/yade/+question/285260

Jan Stránský proposed the following answer:
Hello Behzad,

if the model is unstable, it is usually a problem of time step. What
happens if you decrease the time step?

With the "stiffness" approach, would you get different forces / moments
then in "viscoelastic" approach? If so, why not to change the computation
directly in the "viscoelastic" approach?

cheers
Jan


2016-03-02 21:47 GMT+01:00 behzad <question285260@xxxxxxxxxxxxxxxxxxxxx>:

> Question #285260 on Yade changed:
> https://answers.launchpad.net/yade/+question/285260
>
> behzad posted a new comment:
>
> The intended model is Burger's model. I have already derived CohBurgersMat
> from CohFrictMat and CohBurgersPhys from CohFrictPhys. This model seems to
> be working very well.
>
> However, I just noticed that there's a problem in shear/rotational
> forces. This makes the model unstable. I worked on it but I couldn't
> find the problem. Then, I decided to work on CohFrictMat to get the
> Burger's embedded on it. So, that's the reason!
>
> I can share my model files with you. Actually I already did. I wanted to
> make it public, so everybody can see and modify it. I wasn't able to
> commit my changes with my account.
>
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