yade-users team mailing list archive

[luc scholtes <lscholtes63@xxxxxxxxx>]

Just for information, have a look to CohesiveFrictionalPM which should suit
your wishes (tension with possible softening, cohesion and moment rotation
law which should hopefully provide bending and torsion). I tested it for
rock type materials (coal and concrete) and it seems to give good results (
BTW, every kind of external feedback is welcome!).

Cheers

  Luc

2010/3/31 Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx>

> <http://www.springerlink.com/content/412t27w5955643jl/>Hello
>
>  I saw the files of yade but I don't underestand how the Kn , Ks are
>> calculated,
>>
> In the frictional model, there is no tension, that is true. I think you
> need Cpm (or CohesiveFrictionalLaw) if you want tension.
> I all cases, kn/ks are user-defined constants, function of modulus, size of
> elements, and ration ks/kn. In Ip2_FrictMat_FrictMat_FrictPhys or in
> CohesiveFrictionalRelationShips, it will give Kn=E*d, in Cpm it will be
> Kn=pi/2*E*d (right?). In both cases, you can just invert the relations to
> define which "E" corresponds to your desired Kn.
>
>  I know that Cpm is for Concrete but in the other law it seems that  there
>> is no tension,
>> the model in the above papers is not for particular material and Kn, Ks is
>> only depend
>> E, poisson' ratio and sphere radius.
>>
> Cpm being for concrete should not be a problem, you don't need to write any
> code as long as you want the same simple laws as in your papers. Besides, in
> Alonso's paper, Kn/Ks depend not only on E, Poisson and size, they also
> depend on the considered packing arrangement. Which one do you choose?
>
>
> Bruno
>
>
>
> _______________________________________________
> Mailing list: https://launchpad.net/~yade-users<https://launchpad.net/%7Eyade-users>
> Post to     : yade-users@xxxxxxxxxxxxxxxxxxx
> Unsubscribe : https://launchpad.net/~yade-users<https://launchpad.net/%7Eyade-users>
> More help   : https://help.launchpad.net/ListHelp
>