Re: [Yade-users] [Question #263634]: MatchMaker use
Question #263634 on Yade changed: https://answers.launchpad.net/yade/+question/263634 Anton Gladky proposed the following answer: It works also with Ip2_FrictMat_FrictMat_FrictPhys::frictAngle == #!/usr/bin/python # -*- coding: utf-8 -*- from yade import pack,timing r1 = 0.002381 r2 = 0.002381 mat1 = O.materials.append(FrictMat(young=50e9,density=6000,poisson=.2,label='shots1')) mat2 = O.materials.append(FrictMat(young=50e9,density=6000,poisson=.2,label='shots2')) mat3 = O.materials.append(FrictMat(young=50e9,density=6000,poisson=.2,label='shots3')) id11 = O.bodies.append(sphere(center=[0,0,0],radius=r1,material=mat1,fixed=True,color=[0,0,1])) id12 = O.bodies.append(sphere(center=[0,0,(r1+r2)],radius=r2,material=mat2,fixed=False,color=[0,0,1])) id21 = O.bodies.append(sphere(center=[3*r1,0,0],radius=r1,material=mat1,fixed=True,color=[0,1,0])) id22 = O.bodies.append(sphere(center=[3*r1,0,(r1+r2)],radius=r2,material=mat3,fixed=False,color=[0,1,0])) id31 = O.bodies.append(sphere(center=[6*r1,0,0],radius=r1,material=mat2,fixed=True,color=[1,0,0])) id32 = O.bodies.append(sphere(center=[6*r1,0,(r1+r2)],radius=r2,material=mat3,fixed=False,color=[1,0,0])) O.engines=[ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Facet_Aabb(),]), InteractionLoop( [Ig2_Sphere_Sphere_ScGeom(),Ig2_Facet_Sphere_ScGeom()], [Ip2_FrictMat_FrictMat_FrictPhys( frictAngle=MatchMaker(matches=((mat1,mat2,.1),(mat1,mat3,.2),(mat2,mat3,.3))), label='damping')], [Law2_ScGeom_FrictPhys_CundallStrack(label='contactLaw')] ), NewtonIntegrator(damping=.3,gravity=(0,0,-1e3)), # gravity artificially high, to make it faster going ;-) ] O.dt=PWaveTimeStep() O.step() print Friction coefficient for id11 and id12 is %g%(math.atan(O.interactions[id11,id12].phys.tangensOfFrictionAngle)) print Friction coefficient for id21 and id22 is %g%(math.atan(O.interactions[id21,id22].phys.tangensOfFrictionAngle)) print Friction coefficient for id31 and id32 is %g%(math.atan(O.interactions[id31,id32].phys.tangensOfFrictionAngle)) from yade import qt qt.Controller() qt.View() = -- You received this question notification because you are a member of yade-users, which 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 #263634]: MatchMaker use
Question #263634 on Yade changed: https://answers.launchpad.net/yade/+question/263634 Andy Torres posted a new comment: Hi Bruno and Anton, @Bruno, (in answer to #3) I have been using the same script without the MatchMaker, changing the values of frictAngle without any trouble, and try changing the material id, etc. so i think the problem is not the script, if needed, i can post the whole script. @Anton, thanks, i will test those modifications and let you know how it goes! -- You received this question notification because you are a member of yade-users, which 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 #263634]: MatchMaker use
Question #263634 on Yade changed: https://answers.launchpad.net/yade/+question/263634 Anton Gladky proposed the following answer: in viscoelastic model MatchMaker is implemented only for en, et and tc [1]. For friction coefficient the minimal for 2 interacting materials is taken [2]. I think, we can implement MatchMaker if needed not causing regressions. [1] https://github.com/yade/trunk/blob/master/pkg/dem/ViscoelasticPM.cpp#L188 [2] https://github.com/yade/trunk/blob/master/pkg/dem/ViscoelasticPM.cpp#L247 -- You received this question notification because you are a member of yade-users, which 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 #263634]: MatchMaker use
Question #263634 on Yade changed: https://answers.launchpad.net/yade/+question/263634 Anton Gladky proposed the following answer: Should be fixed. https://github.com/yade/trunk/commit/cdac2f989e1ef8f0c27919b904cecc8186b22f99 -- You received this question notification because you are a member of yade-users, which 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 #263634]: MatchMaker use
Question #263634 on Yade changed: https://answers.launchpad.net/yade/+question/263634 Status: Open = Answered Bruno Chareyre proposed the following answer: Hello Andy, what you describe sounds like a bug. MatchMakers would be broken? Did you check some example scripts using matchmakers to determine if the problem is in Yade or in your own script (wrong material Id, this kind of thing...)? -- You received this question notification because you are a member of yade-users, which 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 #263634]: MatchMaker use
Question #263634 on Yade changed: https://answers.launchpad.net/yade/+question/263634 Bruno Chareyre posted a new comment: @Anton, Thanks but I think the OP is still a pending issue. Ip2_FrictMat_FrictMat_FrictPhys::frictAngle is already a MatchMaker, so the first attempt of Andy should have work in the first place. -- You received this question notification because you are a member of yade-users, which 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 #263739]: isotropic compression at controled pressure
Question #263739 on Yade changed: https://answers.launchpad.net/yade/+question/263739 Status: Open = Answered Luc Sibille proposed the following answer: Hello Luc, Yes it is possible. You can find a detailed example about how to use TriaxialStresscontroller here: http://bazaar.launchpad.net/~yade-pkg/yade/git-trunk/view/head:/examples/triax-tutorial/script-session1.py to control the pressure on all the walls you have do define the arguments: stressMask = 7 and goal1=goal2=goal3=the pressure that you want to (with a minus sign for a compressive pressure). Cheers, Luc Le Lundi 16 Mars 2015 17:16 CET, Luc OGER question263...@answers.launchpad.net a écrit: New question #263739 on Yade: https://answers.launchpad.net/yade/+question/263739 I am new in the use of Yade and it is not clear for me how to define some parameters for the TriaxialStresscontroller class in order to make a triaxial compression with identical pressures in all the walls. In my understanding of the class I can controled the strain rate and/or the wall displacements but not the pressure on all the walls to have the same value during the isotropic compression. so my question : is it possible ? and if yes how I can do that? thanks in advance. -- You received this question notification because you are a member of yade-users, which 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 -- Luc Sibille Université Joseph Fourier / IUT1 de Grenoble Laboratoire 3SR UMR CNRS Tel lab.: +33 (0)4 76 82 63 48 Tel IUT: +33 (0)4 76 82 53 36 You received this question notification because you are a member of yade-users, which 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 #263739]: isotropic compression at controled pressure
New question #263739 on Yade: https://answers.launchpad.net/yade/+question/263739 I am new in the use of Yade and it is not clear for me how to define some parameters for the TriaxialStresscontroller class in order to make a triaxial compression with identical pressures in all the walls. In my understanding of the class I can controled the strain rate and/or the wall displacements but not the pressure on all the walls to have the same value during the isotropic compression. so my question : is it possible ? and if yes how I can do that? thanks in advance. -- You received this question notification because you are a member of yade-users, which 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 #263739]: isotropic compression at controled pressure
Question #263739 on Yade changed: https://answers.launchpad.net/yade/+question/263739 Status: Answered = Open Luc OGER is still having a problem: Luc Thanks for the fast answer but this example is not exactly that I was expecting : I want to compress by the walls not by growxing the spheres and as the time to get equilibrium when moving the walls is crucial I want to select the rate to this iso-compression. if I understand mask=7 and all goal identical are more linked to final results not to the progressive intermediate steps. Luc -- You received this question notification because you are a member of yade-users, which 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 #263739]: isotropic compression at controled pressure
Question #263739 on Yade changed: https://answers.launchpad.net/yade/+question/263739 Status: Open = Answered Jérôme Duriez proposed the following answer: Performing isotropic compression moving the walls at a constant rate is still possible: you just have to switch internalCompaction to false (*) (it is true by default) As for the rate part, using stressMask = 7, the appropriate attribute to set is max_vel (**). Basically, for stress controlled behavior of TriaxialStressController, this engine tries, moving the walls with internalCompaction=0, to reach the desired stress value in one iteration. But, without exceeding a wall velocity of max_vel... Then, if you want to iso-compress your sample to some pressure significantly different from the initial one, just use stressMask=7, internalCompaction=0, and max_vel=someValue, and you will perform an isotropic compression at a constant strain rate corresponding to someValue From my point of view, there is no reason to consider all these attributes related to final results rather than intermediate steps. (*) https://yade-dem.org/doc/yade.wrapper.html?highlight=triaxialstress#yade.wrapper.TriaxialStressController.internalCompaction (**) https://yade-dem.org/doc/yade.wrapper.html?highlight=triaxialstress#yade.wrapper.TriaxialStressController.max_vel -- You received this question notification because you are a member of yade-users, which 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 #262899]: YADE and FEM model
Question #262899 on Yade changed: https://answers.launchpad.net/yade/+question/262899 Status: Expired = Open Luis Barbosa is still having a problem: ok, no problem! I have a FEM model, that I've created using ABAQUS. What I would like to do now is open this model using YADE, to simulate its interaction with granular material. Are there some documentation or example of this process? Thanks a lot. Luis -- You received this question notification because you are a member of yade-users, which 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
