> in fact I am not yet dealing with cohesive laws. Actually if one wants > to test the shear direction it is not as straightforward as for the > normal part. I managed to do that having viscous damping at contacts > (so that, in a sphere-sphere interaction, you first apply a force in > the normal direction till you reach equilibrium having a damped > solution and then you apply the shear force and look at the problem as > it is in the normal direction, the incremental formulation eventually > being the only difference). But if I take another law, say the Mindlin > one, I do not know how to repeat the test not having damping for > normal/shear direction. Depends what you expect from pure shear test as output.
For instance, to see plasticity "surface", you could apply normal displacement at the beginning so that maxFs>0, then turn one sphere so that you reach maxFs; then progressively go with normal deformation to zero. That should make shearForce follow maxFs(Fn(t)), eventually approaching zero. I don't really see the relationship to damping, either. Sorry. Oh, perhaps there is misunderstanding about applying force and displacement. In one-one.py, both spheres are non-dynamic (will not move because of forces), and using JumpChangeSe3 (weird name, I know) will enforce exact positions, and, by that token, also exact deformations of the contact. Then you don't have to care about damping. v _______________________________________________ Mailing list: https://launchpad.net/~yade-users Post to : [email protected] Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
