Question #688439 on Yade changed: https://answers.launchpad.net/yade/+question/688439
Luc Sibille proposed the following answer: > But my problem is about the amount of peak friction angle before considering > rolling stiffness (I mean without considering CohesionMomment) and after > that. when I use just FrictPhys_CundallStrack as the contact law, with the > Inter-Particle friction angle of 30 degree, I can't get peak friction angle > of experimental data that is about 40 degree. This is a classical result: with spherical particles and without rolling resistance, internal peak friction angle relatively high (typically 40 deg) cannot be reproduced. > Because of this problem, I tried to model a sample with more stiffness until > getting more peak friction angle. After using CohesionMoment and setting > alpaKr (for example alphaKr=0.5 or 1), I couldn't see any changes. Again, stiffnesses, as normal, tangential or rolling stiffnesses, if their are chosen sufficient high should not affect the failure properties as the peak friction angle. So it may be normal that peak friction angle is not affected by such stiffnesses. Then peak friction angle is more strongly affected by the contact friction angle and plastic rolling moment coefficient (or rolling friction coefficient) etaRoll (and not alphaKr). Besides, be sure that the rolling resistance is activated. It is not because you use Law2_ScGeom6D_CohFrictPhys_CohesionMoment that rolling resistance is necessarily activated: rolling resistance can be enable or disable depending on some arguments in Law2_ScGeom6D_CohFrictPhys_CohesionMoment and/or CohFrictMat Luc -- Luc Sibille Université Grenoble Alpes / IUT1 de Grenoble Laboratoire 3SR: Sols, Solides, Structures, Risques Tel lab.: +33 (0)4 76 82 63 48 Tel IUT: +33 (0)4 76 82 53 36 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 : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
