Question #691785 on Yade changed: https://answers.launchpad.net/yade/+question/691785
Jérôme Duriez posted a new comment: > the normal stiffness coefficient "kn" in "PolyhedraPhys" can have a variety of different units Indeed, I missed this point.. This would greatly affect (and not positively) the measure of packing-wall stiffness and stress servo control by the engine.. TriaxialStressController needs true spring force/displacement stiffness to work.. [*] Maybe a simple solution could be to use bodies of Polyhedra shape, but stick with a classical FrictMat material (I do not know how much built-in functions for bodies creation, like utils.polyhedron or polyhedra_utils.polyhedra accommodate this behavior, but you can always create yourself the correct Body) and FrictPhys interactions physics Using classical ScGeom through Ig2_Polyhedra_Polyhedra_ScGeom might be necessary as well in the end (for picking an existing Law2) As for the boundary bodies, I did not get whether you intend to use Box-shaped or Wall-shaped ones (both are possible with TriaxialStressController, just assign yourself TriaxialStressController.thickness = 0 if you want Wall s). But note that Wall-Polyhedra interaction has recently been updated / corrected [**] (from a personal point of view, I can share I'm sometimes trying to play with Polyhedra shapes at the moment, but never ran a triaxial test myself. And I'm looking forward to feedback from other Polyhedra users..) [*] https://gitlab.com/yade-dev/trunk/-/blob/master/pkg/dem/TriaxialStressController.cpp#L73 and https://gitlab.com/yade-dev/trunk/-/blob/master/pkg/dem/TriaxialStressController.cpp#L99 [**] see the history at https://gitlab.com/yade-dev/trunk/-/merge_requests/502 -- 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
