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 <[email protected]> > <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 : [email protected] > Unsubscribe : > https://launchpad.net/~yade-users<https://launchpad.net/%7Eyade-users> > More help : https://help.launchpad.net/ListHelp >
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