Re: [Yade-users] [Question #562171]: Why I can't get stress？
Question #562171 on Yade changed: https://answers.launchpad.net/yade/+question/562171 Robert Caulk posted a new comment: I am unsure what you mean by "it is still the same". I have run your script, including O.run(), and it runs without error. triax.stress returns stresses. Can you provide more details about your setup? -which version of yade are you using? -what distribution of linux are you using? -details about the behavior of yade and your specific interactions with it when the behavior seems abnormal? Here is your code, including O.run(). O.dt=PWaveTimeStep() O.run() def controlporosity(): targateporosity=0.36 a=utils.porosity() print 'stress tensor ', triax.stress if ahttps://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 #556907]: Apply cohesive interaction on JCFpmMat
Question #556907 on Yade changed: https://answers.launchpad.net/yade/+question/556907 weijy posted a new comment: Hi Luc, here is my script: from yade import pack,export compFricDegree = 30 confiningPressure = 1e4 O.materials.append(JCFpmMat(young=5e6, poisson=0.5, frictionAngle = radians(compFricDegree), cohesion = 1e3, tensileStrength = 1e2, density=2770, label='spheres')) O.materials.append(FrictMat(young=5e6, poisson=0.5, frictionAngle = 0, density=0, label='walls')) walls=aabbWalls([Vector3(0,0,0),Vector3(0.10,0.2,0.10)],thickness=0,material='walls') wallIds=O.bodies.append(walls) sp=pack.SpherePack() sp.makeCloud(Vector3(0,0,0),Vector3(0.10,0.2,0.10),rRelFuzz = 0.2,num = 500,porosity = 0.95,seed = 1) O.bodies.append([sphere(center,rad,material='spheres') for center,rad in sp]) triax=TriaxialStressController(maxMultiplier=1.+5e-4,finalMaxMultiplier=1.+3e-5,thickness = 0,stressMask = 7,internalCompaction = True) triax.goal1=triax.goal2=triax.goal3=-confiningPressure O.engines=[ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(label = 'bo1s'),Bo1_Box_Aabb()]), InteractionLoop( [Ig2_Sphere_Sphere_ScGeom(label = 'ig2ss'),Ig2_Box_Sphere_ScGeom()], [Ip2_FrictMat_FrictMat_FrictPhys(),Ip2_JCFpmMat_JCFpmMat_JCFpmPhys(label = 'ip2jj')], [Law2_ScGeom_FrictPhys_CundallStrack(),Law2_ScGeom_JCFpmPhys_JointedCohesiveFrictionalPM()] ), GlobalStiffnessTimeStepper(active=1,timeStepUpdateInterval=100,timestepSafetyCoefficient=0.8), triax, NewtonIntegrator(), PyRunner(command = 'set_friction()', iterPeriod = 1000, label = 'checker'), ] def set_friction(): global compFricDegree print '*' print 'current step is ',O.iter print 'unbalanced force:',unbalancedForce(),' mean stress: ',triax.meanStress if unbalancedForce()<0.01 and abs(-confiningPressure-triax.meanStress)/confiningPressure<0.001: checker.command = 'set_interaction()' checker.ietrPeriod = 1 def set_interaction(): num_intr = 0 bo1s.aabbEnlargeFactor = 1.2 ig2ss.interactionDetectionFactor = 1.2 for i in O.interactions: num_intr = num_intr + 1 print '*' print 'current step is ',O.iter print 'total interactions before setting intR is ', num_intr ip2jj.cohesiveTresholdIteration = O.iter + 1 checker.iterPeriod = 1 checker.command = 'check_cohesion()' def check_cohesion(): num_intr = 0 num_coh = 0 bo1s.aabbEnlargeFactor = -1 ig2ss.interactionDetectionFactor = -1 for i in O.interactions: if isinstance(O.bodies[i.id1].shape,Sphere) and isinstance(O.bodies[i.id2].shape,Sphere): num_intr += 1 if i.phys.FnMax > 0: num_coh +=1 print '*' print 'current step is ',O.iter print 'total interactions after setting intR is ', num_intr print 'number of cohesive interactions is ',num_coh O.pause() -- 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 #562171]: Why I can't get stress？
Question #562171 on Yade changed: https://answers.launchpad.net/yade/+question/562171 Status: Answered => Solved 张文卿 confirmed that the question is solved: Hello，what do you mean？I have added O.run() to my script.It is still the same. -- 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 #562190]: Change about Ig2_Facet_Sphere_ScGeom.cpp
Question #562190 on Yade changed: https://answers.launchpad.net/yade/+question/562190 Status: Answered => Open Gastbye Liu is still having a problem: Thanks for your reply! After your advise, I made some output on datafile, which contains O.iterations.id1 and O.iterations.id2. I compared the version output on the same condition. On the first time step, the difference is clear. The two version's output data is same but the order changed. ( The first step don't use my Ig2_Facet_Sphere_ScGeom.cpp. ) When I use my new.cpp do calculation, then the second step has wrong data and the wrong data is more and more as the timestep grows. What should I do? Make change on my new.cpp ? -- 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 #562190]: Change about Ig2_Facet_Sphere_ScGeom.cpp
Question #562190 on Yade changed: https://answers.launchpad.net/yade/+question/562190 Gastbye Liu posted a new comment: Thanks for your reply! After your advise, I made some output on datafile, which contains O.iterations.id1 and O.iterations.id2. I compared the version output on the same condition. On the first time step, the difference is clear. The two version's output data is same but the order changed. ( The first step don't use my Ig2_Facet_Sphere_ScGeom.cpp. ) When I use my new.cpp do calculation, then the second step has wrong data and the wrong data is more and more as the timestep grows. What should I do? Make change on my new.cpp ? -- 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 #562171]: Why I can't get stress？
Question #562171 on Yade changed: https://answers.launchpad.net/yade/+question/562171 Status: Open => Answered Robert Caulk proposed the following answer: Hello, Looks like you need to add the O.run() command to start your simulation. Robert -- 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 #562190]: Change about Ig2_Facet_Sphere_ScGeom.cpp
Question #562190 on Yade changed: https://answers.launchpad.net/yade/+question/562190 Status: Open => Answered Bruno Chareyre proposed the following answer: You generate a diff by comparing two source folders (original vs. the one you modified). It gives a text file you can send to us. If you reach the point where you have a clean code, no excessive side effects and you can explain to us what is changed and why, then we can go in more details into how to generate such a patch. Bruno -- 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 #562190]: Change about Ig2_Facet_Sphere_ScGeom.cpp
Question #562190 on Yade changed: https://answers.launchpad.net/yade/+question/562190 Status: Answered => Open Gastbye Liu is still having a problem: How cound I use the patch to be applied on trunk? -- 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 #562184]: I want to know the the proper constitute law for rock
Question #562184 on Yade changed: https://answers.launchpad.net/yade/+question/562184 Status: Answered => Solved JIPEIQI confirmed that the question is solved: Thanks Luc Scholtès, 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
Re: [Yade-users] [Question #562190]: Change about Ig2_Facet_Sphere_ScGeom.cpp
Question #562190 on Yade changed: https://answers.launchpad.net/yade/+question/562190 Status: Open => Answered Bruno Chareyre proposed the following answer: Hello, it is not surprising that a in-house source code does not survive multiple versions, unfortunatlely. The only backward compatibility we can hope is for python script. We can't tell what the problem is based on your explanation, but my advice would be to start from the current Ig2_Facet_Sphere_ScGeom and modify it to your needs. And possibly, suggest a patch to be applied on trunk so that in the future you don't have the same problem again. Bruno -- 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 #562190]: Change about Ig2_Facet_Sphere_ScGeom.cpp
New question #562190 on Yade: https://answers.launchpad.net/yade/+question/562190 Because I want to do FEM*DEM coupling project, I have to add functions about the geo-information for the contact between facet and sphere. My senior had made a new cpp named Ig2_Facet_Sphere_ScGeom_new.cpp, it worked on the version Yade-1.07. Just put the new.cpp on the folder of pkg/dem/, then compile it and make. But now I use the new version Yade-2017.01a and in the same way compile it and make and make install. It seems that there is no strange thing happened. But when I use that to calculate, I found problem. After initialization and O.engine started working, the vtk-output said some data are "nan" . In other words, the sphere's position are not right. But I don't use the new.cpp, it works fine. I tried but it also don't work. I am wondering that it need another change (in other file) beacause of the version changing. Please help me. Hope your reply. Many Thanks. -- 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 #562184]: I want to know the the proper constitute law for rock
Question #562184 on Yade changed: https://answers.launchpad.net/yade/+question/562184 Status: Open => Answered Luc Scholtès proposed the following answer: Hi, Have a look at the JCFPM class which has been used for modelling of rock like materials: See for instance: - http://www.sciencedirect.com/science/article/pii/S1365160912000391 - http://www.sciencedirect.com/science/article/pii/S0022509612002268 - http://www.sciencedirect.com/science/article/pii/S0013794415007225 Luc -- 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 #562184]: I want to know the the proper constitute law for rock
Question #562184 on Yade changed: https://answers.launchpad.net/yade/+question/562184 Description changed to: Hey I am the new comer here. I am trying to simulate the rock behavior. I checked the help manual and I'm totally confused. So I wonder if there are any mature rock model or bond model in Yade. Is the CPMat a proper choice for rock? Thanks a lot. -- 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 #562184]: I want to know the the proper constitute law for rock
New question #562184 on Yade: https://answers.launchpad.net/yade/+question/562184 Hey I am the new comer here. I am trying to simulate the rock behavior. I checked the help manual and I'm totally confused. So I wonder if there are any mature rock model or bond model in Yade. Thanks a lot. -- 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 #562171]: Why I can't get stress？
New question #562171 on Yade: https://answers.launchpad.net/yade/+question/562171 I’m using PeriTriaxController to get packing with desired porosity.But when I used ‘triax.stress' to get average stresses ,it showed (0,0,0).And it's weird this script can work.So where should I change?Here is my script: r=1.75e-05 O.periodic=True O.cell.hSize=Matrix3(41*r,0,0, 0,41*r,0, 0,0,41*r) O.materials.append(FrictMat(young=1.1e11,poisson=0.3,density=8900e12,frictionAngle=0,label='sphere')) sp=pack.SpherePack() sp.makeCloud((0,0,0),(40*r,40*r,40*r),r,0,4000,False) O.bodies.append([sphere(center,rad,material='sphere') for center,rad in sp]) triax triax=PeriTriaxController(goal=(-2e4,-2e4,-2e4),stressMask=7) Engine### O.engines=[ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb()],verletDist=0.05*r), InteractionLoop( [Ig2_Sphere_Sphere_ScGeom()], [Ip2_FrictMat_FrictMat_MindlinPhys()], [Law2_ScGeom_MindlinPhys_HertzWithLinearShear()] ), PyRunner(command='controlporosity()',iterPeriod=1), triax, NewtonIntegrator(damping=.2) ] O.dt=PWaveTimeStep() def controlporosity(): targateporosity=0.36 a=utils.porosity() if ahttps://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 #556997]: How to compute average contact radius
Question #556997 on Yade changed: https://answers.launchpad.net/yade/+question/556997 张文卿 confirmed that the question is solved: Thanks Jérôme Duriez, 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
Re: [Yade-users] [Question #556997]: How to compute average contact radius
Question #556997 on Yade changed: https://answers.launchpad.net/yade/+question/556997 Status: Answered => Solved 张文卿 confirmed that the question is solved: Thanks,Bruno,Jan.I have understood where I was wrong. That helps a lot: ) -- 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
