Question #693640 on Yade changed: https://answers.launchpad.net/yade/+question/693640
xxxea proposed the following answer: > Isn't fixing the pfacets, such that they do not fall, a better approach? ! how to fix them!! i tried but found nothing... > Then please open a new question for the problem (this thread should reamain wall- specific, related to the original question) i will. thanks!!! zhanghanying 邮箱：[email protected] 签名由 网易邮箱大师 定制 On 10/27/2020 16:20, Jan Stránský wrote: Your question #693640 on Yade changed: https://answers.launchpad.net/yade/+question/693640 Status: Open => Answered Jan Stránský proposed the following answer: > ### > O.materials.append(FrictMat(young=4.0e6,... > ... > O.materials.append(FrictMat(young=1.0e12,... > ### the interaction stiffness is given by harmonic mean E=2/(1/E1+1/E2), i.e. it is "determined" by the lower stiffness. In the case E2=inf, E=2/(1/E1+1/inf)=2E1. This is the case, the overall stiffness is basically the same as in your air-wall example. > NewtonIntegrator(damping=0.01,gravity=[0,0,-1e2]), > in wall.py i posted above the sphere falls then settles down quickly. what does "quickly" mean? In my case, the sphere bounces "many times" before settling. Settling is the effect of numerical damping. Setting damping=0, it bounces "forever". Law2_ScGeom_FrictPhys_CundallStrack, theoretically, should have no "settling" effect (for damping=0 of course). For better control of coefficient of restitution, you have to use a more advanced constitutive law. > what i want to simulate is a 2D rectangular made of pfacets Then please open a new question for the problem (this thread should reamain wall-specific, related to the original question) > the problem is that the pfacets fall down too...which is not what i want. so i guess a wall under pfacet would help Isn't fixing the pfacets, such that they do not fall, a better approach? cheers Jan -- If this answers your question, please go to the following page to let us know that it is solved: https://answers.launchpad.net/yade/+question/693640/+confirm?answer_id=6 If you still need help, you can reply to this email or go to the following page to enter your feedback: https://answers.launchpad.net/yade/+question/693640 You received this question notification because you asked the 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 : [email protected] Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
