Re: [Yade-users] [Question #706779]: Wall disappearing
Question #706779 on Yade changed: https://answers.launchpad.net/yade/+question/706779 Status: Open => Expired Launchpad Janitor expired the question: This question was expired because it remained in the 'Open' state without activity for the last 15 days. -- 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 #706779]: Wall disappearing
Question #706779 on Yade changed: https://answers.launchpad.net/yade/+question/706779 Jan Stránský posted a new comment: I have no idea myself. I suspect the triax engine to do some division by O.dt for stress controlled walls. You / somebody else can dig into source code if you want or somebody with the knowledge can answer. Cheers Jan -- 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 #706779]: Wall disappearing
Question #706779 on Yade changed: https://answers.launchpad.net/yade/+question/706779 Status: Answered => Open mohsen is still having a problem: Hi Jan That works for me too! but would you please let me know what happen if dt set non-zero? -- 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 #706779]: Wall disappearing
Question #706779 on Yade changed: https://answers.launchpad.net/yade/+question/706779 Status: Open => Answered Jan Stránský proposed the following answer: Hello, If I set non-zero O.dt, the walls remain. > although the walls are added to simulation before the definition of material labeled as 'cube', however when the script is run, their material type is shown as 'cube'. here is the MWE: The MWE shows nothing about materials.. If I check in console or the script for b in O.bodies: print(b.mat.label) I get 6x "wall" and 8x "cube" > the second strange thing please open separate problem for separate question ([1], point 5) Cheers Jan [1] https://www.yade-dem.org/wiki/Howtoask -- 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 #706779]: Wall disappearing
Question #706779 on Yade changed: https://answers.launchpad.net/yade/+question/706779 mohsen posted a new comment: Another thing that happen and may help to solve the problem, is that if the stressMask changed, for example to 4 (loading along z axis), just the walls with the normal vector parallel to z (bodies 4 and 5) disappear. -- 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 #706779]: Wall disappearing
New question #706779 on Yade: https://answers.launchpad.net/yade/+question/706779 In the name of God Hi every one! I encountered an strange problem. when i add some spheres bonded to each other using CohFrictMat in a triaxial box, by the first step the walls disappeared. what is wrong? the second strange thing is that although the walls are added to simulation before the definition of material labeled as 'cube', however when the script is run, their material type is shown as 'cube'. here is the MWE: from yade import pack ### DEFINING VARIABLES AND MATERIALS ### # The following 5 lines will be used later for batch execution ConPre=-10 ConPre1=-5000 key='t_20%_25_100' # put you simulation's name here targetPorosity = 0.38#the porosity we want for the packing compFricDegree = 30 # initial contact friction during the confining phase (will be decreased during the REFD compaction process) finalFricDegree = 30 # contact friction during the deviatoric loading young=1e9 # contact stiffness mn,mx=Vector3(0,0,0),Vector3(.3,.3,.3) # corners of the initial packing O.materials.append(CohFrictMat(young=1e9,poisson=0.2,density=1500,isCohesive=False,frictionAngle=0,label='walls')) ## create walls around the packing walls=aabbWalls([mn,mx],thickness=0) wallIds=O.bodies.append(walls) ## create materials for spheres and plates O.materials.append(CohFrictMat(young=1e6,poisson=0.48,density=1500,label='cube',frictionAngle=radians(compFricDegree), isCohesive=True, normalCohesion=5000, shearCohesion=5000, momentRotationLaw=True )) sp=pack.SpherePack() sp.makeCloud((0,0,0),(.3,.3,.3),rMean=.05,distributeMass=False,seed=1) # ### DEFINING ENGINES ### triax=TriaxialStressController( maxMultiplier=1.+2e4/young, # spheres growing factor (fast growth) finalMaxMultiplier=1.+2e3/young, # spheres growing factor (slow growth) thickness = 0, stressMask = 7, internalCompaction=False, # If true the confining pressure is generated by growing particles ) newton=NewtonIntegrator(damping=.1) O.engines=[ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Box_Aabb()]), InteractionLoop( [Ig2_Sphere_Sphere_ScGeom6D(interactionDetectionFactor=1.12),Ig2_Box_Sphere_ScGeom6D()], [Ip2_CohFrictMat_CohFrictMat_CohFrictPhys( setCohesionNow=True, setCohesionOnNewContacts=False, )], [Law2_ScGeom6D_CohFrictPhys_CohesionMoment(),Law2_ScGeom_FrictPhys_CundallStrack()] ), triax, newton, ] triax.goal1=triax.goal2=ConPre1 triax.goal3=ConPre1 O.dt=0 yade.qt.Controller() for x in [.1,.2]: for y in [.1,.2]: for z in [.1,.2]: s = utils.sphere((x,y,z),.08,material='cube') O.bodies.append(s) ###By adding the following lines to the terminal, the walls disppeared #O.step() -- 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
