Question #696515 on Yade changed: https://answers.launchpad.net/yade/+question/696515
Jan Stránský proposed the following answer: >>how to enlarge the polyhedron? > For polyhedron-polyhedron,I found that in > Ig2_Polyhedra_Polyhedra_PolyhedraGeom[6]the rotation matrix is multiplied by > interactionDetectionFactor to enlarge the two polyhedrons.This may be helpful > in my case to enlarge between 2 polyhedrons.But for the interaction between > sphere and polyhedron，how should I deal with it It is up to you and your needs :-) For sphere, I think the only meaningful option is to simply enlarge its radius. For polyhedrons, there more options: - simply enlarge the polyhedron vertices from the polyhedron center - wrap the polyhedron with "equidistant" surface, something like Minkowski sum - surely other meaningful polyhedron enlargement exist The proper choice depends on the problem. >> How to set stiffness of such distant interaction? > The values of kn and Ks depend on crosssection and reflength. For polyhedron > - polyhedron, polyhedron - sphere, is their crosssection calculation still pi > * Rmin ^ 2[8]? If so, is the value of radius should multiplied by > interactiondetectionfactor? I agree with Bruno that multiplication of these values by interactionDetectionFactor does not make much sense (although of course it can be used). In general, the Rmin, cross-section and refLength may be used. Rmin for polyhedron is currently a rough estimation (or even hack), it can be done in a more sophisticated way if needed - e.g. taking into account orientation of the interaction w.r.t polyhedron orientation. Cheers Jan -- You received this question notification because your team yade-users is an answer contact for Yade. _______________________________________________ Mailing list: https://launchpad.net/~yade-users Post to : [email protected] Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
