Re: [Yade-users] [Question #699705]: Empirical value of rolling stiffness (Krot)
Question #699705 on Yade changed: https://answers.launchpad.net/yade/+question/699705 Status: Answered => Open Zhicheng Gao is still having a problem: Dear Duriez I want to use Hertz-Mindlin contact law, the sphere is rough with rolling resistance, and the wall is smooth without friction. In Yade, the Ip2_FrictMat_FrictMat_MindlinPhys[1] use the Hertz-Mindlin contact law, and the LawFunctor is Law2_ScGeom_MindlinPhys_Mindlin[2]. How should I assign different FrictMat instances to spheres or walls? In the FrictMat[3], there are no rolling resistance and rolling stiffness parameters. Only in the Ip2_FrictMat_FrictMat_MindlinPhys the parameters 'eta' and 'krot' are used to set the rolling resistance and rolling stiffness. https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.Ip2_FrictMat_FrictMat_MindlinPhys https://yade-dem.org/doc/yade.wrapper.html?highlight=includemoment#yade.wrapper.Law2_ScGeom_MindlinPhys_Mindlin https://yade-dem.org/doc/yade.wrapper.html?highlight=frictmat#yade.wrapper.FrictMat -- 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
[Yade-users] [Question #699741]: How to fix boundary walls
New question #699741 on Yade: https://answers.launchpad.net/yade/+question/699741 Hi, I'm carrying out triaxial tests using the script from [1], which uses rigid walls as boundary. The whole process contains: (a) making sample with target confining pressure and porosity, (b) deviatoric loading. I'd like to introduce another step for stress relaxation between step (a) and step (b). In this new step, I want to close the triaxial engine and fix all the six walls, and just let the simulation run for some steps with a higher damping coefficient. The way how I fix the walls is by blocking all the degrees of walls, as well as triax.dead=True: triax.wall_bottom_activated=False triax.wall_top_activated=False triax.wall_front_activated=False triax.wall_back_activated=False triax.wall_left_activated=False triax.wall_right_activated=False triax.dead=True for i in range(6): O.bodies[i].state.blockedDOFs='xyzXYZ' ### However, I found that in some cases, the size of the sample changes a lot after running for a long time, which means the boundary walls are actually not fully fixed. Do you have any idea about why this happened? Thanks Leonard [1]https://gitlab.com/yade-dev/trunk/blob/master/examples/triax-tutorial/script-session1.py -- 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
Re: [Yade-users] [Question #699428]: Cannot simulate periodic box with walls
Question #699428 on Yade changed: https://answers.launchpad.net/yade/+question/699428 Danny (Dingeman) van der Haven confirmed that the question is solved: Thanks Jan Stránský, that solved my question. -- 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
