OK, I get it now, thanks for clarification. The code in SimpleElasticRelationships is a little confusing, though correct; I was veryfying those formulas accidentally this morning. It needs some comment in the code.
v > It is used in that sense, in the code I thougt the initial question was > reffering to. > Sorry if the joke was obscure, I meant this naming was misleading. > > One example in SimpleElasticRelationShip l.38 : > > Real Va = mat1->poisson; > Real Vb = mat2->poisson; > > Real Kn = 2*Ea*Da*Eb*Db/(Ea*Da+Eb*Db); > Real Ks = 2*Ea*Da*Va*Eb*Db*Vb/(Ea*Da*Va+Eb*Db*Va) > > Which means : > kna = Ea/Da, knb = Eb/Db > ksa = poisson*kna, ksb = poisson*knb // ks = kn*nu > > In short, if E, nu, and sizes are the same, it gives : > > Kn = E/D, Ks=nu*Kn. > > So, in the default triaxial test, what you put in the variable > "spherePoissonRatio", is used to define ks/kn. > There is nothing wrong in the equations, for me at least, but I think > I'll rename this parameter "alpha" in the TT interface, so we don't have > confusion. I hope it clarifies the previous mail when I wrote this : > > "For Poisson, the name is only due to the fact that Poisson's ratio > depends mostly on ks/kn. But there is no constant - not even linear - > relation between the micro and the macro in that case." > > It means I named ks/kn "poisson" because it is the only variable (in the > contact law) that can modify nu. There is no proportionality between > ks/kn and nu, however. > > I hope it clarifies. Sorry if I type too fast sometimes (I know I do it > a lot). I'm not asking anybody to change this name, I'm saying I could > change it. > > Bruno > _______________________________________________ Mailing list: https://launchpad.net/~yade-users Post to : [email protected] Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
