Particle breakage

Hi,

There is also Law2_ScGeom_JCFpmPhys_JointedCohesiveFrictionalPM which considers cohesive contacts ("bonds" to use a classical word in rock discrete modelling - which is the purpose of this law). Possible bonds failure in tension or shear are brittle, I would say.

Jerome

I don't understand what you are looking for. Could you clarify the question?
Law2_ScGeom6D_CohFrictPhys_CohesionMoment does not impose anything. It can give brittle or ductile behavior in both tension and shear, it just depends on what you decide.

It is exactly my question.
If Law2_ScGeom6D_CohFrictPhys_CohesionMoment can simulate both brittle and ductile or if is necessary use other contact law.
After some simulations using Law2_ScGeom6D_CohFrictPhys_CohesionMoment, I got only ductile behaviour.
In [1] I tried set fragile(=true), but nothing changed.

[1] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.CohFrictPhys

fragile=true is the default, so ...
Dif you try fragile=false? It should be different.
Besides, I don't believe fragile=true gives a ductile behavior in traction.

On 10 June 2015 at 21:16, Luis Barbosa <<email address hidden>
> wrote:

> Question #267964 on Yade changed:
> https://answers.launchpad.net/yade/+question/267964
>
> Luis Barbosa posted a new comment:
> It is exactly my question.
> If Law2_ScGeom6D_CohFrictPhys_CohesionMoment can simulate both brittle and
> ductile or if is necessary use other contact law.
> After some simulations using Law2_ScGeom6D_CohFrictPhys_CohesionMoment, I
> got only ductile behaviour.
> In [1] I tried set fragile(=true), but nothing changed.
>
> [1] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.CohFrictPhys
>
> --
> You received this question notification because you are a member of
> yade-users, which is an answer contact for Yade.
>
> _______________________________________________
> Mailing list: https://launchpad.net/~yade-users
> Post to : <email address hidden>
> Unsubscribe : https://launchpad.net/~yade-users
> More help : https://help.launchpad.net/ListHelp
>
>

Ok! The behaviour between 2 particles is fragile, the force increases linearly up to the maximum and then becomes zero.
But the bulk behaviour is ductile. There are particle movement before break.

In [1] it is possible see a brittle behaviour of sphere agglomerate (bulk).
[1] https://www.youtube.com/watch?v=w3kFwHrPKL4

Thanks Chareyre, that solved my question.