> 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). I do not quite understand the idea. At this point, SimpleViscoelasticBodyParameters contains the viscoelastic parameters of a single body, i.e. its stiffnesses and viscosity. SimpleViscoelasticRelationships defines the effective parameters of interaction between two different viscoelastic bodies (by analogy with the effective Young's modulus).
The idea of this. The viscoelastic parameters of a single body can be defined in various ways including using collision time and restitution coefficient (which are functions of mass, radius and material of collising bodies) for the collision of a pair identical bodies. Then, using the parameters for the bodies from different species, it is possible to calculate the effective parameters of their interaction. _______________________________________________ Mailing list: https://launchpad.net/~yade-dev Post to : [email protected] Unsubscribe : https://launchpad.net/~yade-dev More help : https://help.launchpad.net/ListHelp _______________________________________________ yade-dev mailing list [email protected] https://lists.berlios.de/mailman/listinfo/yade-dev
