yade-dev team mailing list archive

[Vincent Richefeu <richefeu@xxxxxxxxxxxxxxx>]

> > Thanks a lot. Now, I understand a bit more...
> > The implanted law is for sphere-sphere contacts.
> > I suggest something (tell me your opinion please): what about
> > computing cn and cs for each contact as a function of the
> > corresponding effective mass?
> > In this way, the parameters would be kn,en,ks, and es.
> What is en, es? Is this a restitution coefficients? Please, give me  
> more
> info.

Yes, en and es are normal and tangential coefficients of restitution  
(ratio of velocities after and before the 'impact': vf/vi).
I wanted to say that the parameters in  
SimpleViscoelasticBodyParameters could be the stiffnesses and  
restitution coefficients. Then, the effective mass together with the  
viscous constants could be determined in  
SimpleViscoelasticRelationships (maybe with the equations you showed  
me).

Note that my aim is NOT to criticism your implantation of the law (I  
think it's correct). I just want to have an opinion.

Vincent