[Yade-users] [Question #688324]: rotate to a certain degree
New question #688324 on Yade: https://answers.launchpad.net/yade/+question/688324 Hi all, I want to put a shaft into a soil sample with a vertical velocity and a rotational velocity at the same time. I know that Rotationengine and Helixengine can rotate an object. Right now I can rotate the shaft a full round. I'm wondering if we can rotate the shaft back and forth. for instance, rotate in a clockwise direction for 300 degrees and then 100 degrees in the anticlockwise direction. while keeping the vertical speed all the time. I didn't find any parameters in Rotationengine and Helixengine can set the directions and the degrees. could you please give me some suggestions? thanks! Yong -- 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 #688321]: Not able to apply DOF constraints
New question #688321 on Yade: https://answers.launchpad.net/yade/+question/688321 Hi all, I tried to move a sphere(Cpmmat) using a utilsbox acting as a wall(Frictmat). I want to restrain the degrees of freedom in the other two directions but when I do that, the wall tends to fly away after bouncing on the sphere. Here is a MWE of that phenomenon. Kindly help me to understand where I have gone wrong. from yade import pack, qt, export, ymport, plot O.reset() concrete_material=CpmMat( young = 1e10, density=1400, poisson = 0.25, frictionAngle = radians(40), epsCrackOnset = 1e-4, relDuctility = 10, sigmaT = 1e18, label='concrete_mat' ) mat1=O.materials.append(concrete_material) #O.materials.append(FrictMat(frictionAngle=0,density=0,label='walls')) O.bodies.append([ sphere(center=(0,0,0),radius=.5,fixed=False,material=concrete_material), ]) O.materials.append(FrictMat(frictionAngle=0,density=0,label='walls')) O.engines=[ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(aabbEnlargeFactor=1,label='bo1s'),Bo1_Facet_Aabb(),Bo1_Wall_Aabb(),Bo1_Box_Aabb()]), InteractionLoop( [Ig2_Sphere_Sphere_ScGeom(interactionDetectionFactor=1,label='ig2s'),Ig2_Facet_Sphere_ScGeom(),Ig2_Wall_Sphere_ScGeom(),Ig2_Box_Sphere_ScGeom()], [Ip2_FrictMat_FrictMat_FrictPhys(), Ip2_CpmMat_CpmMat_CpmPhys(cohesiveThresholdIter=1)], [Law2_ScGeom_FrictPhys_CundallStrack(), Law2_ScGeom_CpmPhys_Cpm()] ), NewtonIntegrator(gravity=(0,0,0),damping=0.5), #CpmStateUpdater(iterPeriod=1), GlobalStiffnessTimeStepper(active=True,timeStepUpdateInterval=1,timestepSafetyCoefficient=0.8), ] O.step() U_box= utils.box((.5,1,-.5),(1,0,.5),fixed=True,wire=False,color=(1,0,0)) O.bodies.append(U_box) U_box.state.mass=1 U_box.state.inertia = (1,1,1) U_box.state.blockedDOFs = "xzXYZ" U_box.state.vel=(0,-0.01,0) yade.qt.View() O.saveTmp() ## Many thanks in advance - Arun -- 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 #688195]: permeability model
Question #688195 on Yade changed: https://answers.launchpad.net/yade/+question/688195 Othman Sh posted a new comment: Just following up on this question, any reply? Thank you -- 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 #687413]: sphere packing
Question #687413 on Yade changed: https://answers.launchpad.net/yade/+question/687413 Status: Answered => Solved Othman Sh confirmed that the question is solved: Thanks Robert Caulk, 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 #688280]: How to generate tiny particles in pore space
Question #688280 on Yade changed: https://answers.launchpad.net/yade/+question/688280 Status: Open => Answered Jan Stránský proposed the following answer: if you want non-overlapping particles, use one SpherePack instance, something like (not tested) ### sp=pack.SpherePack() # just one SpherePack sp.makeCloud((0,0,0),(1,1,1),num=900,rMean=0.04,rRelFuzz=0) sp.toSimulation(color=[1,1,1]) doCompaction() # replace by your code sp.fromSimulation() # now sp is according to compacted particles n = len(sp) sp.makeCloud(minCorner,maxCorner,num=3000,rMean=.005,rRelFuzz=.00033) # new particles, guaranteed to be "outside the body of soil particles" = outside already existing particles in sp for i,(c,r) in enumerate(sp): if i < n: # skip already existing particles continue O.bodies.append(sphere(c,r)) ### > rRelFuzz=.00033 rRelFuzz is a relative value, the radii are in the range ((1-rRelFuzz)*rMean, (1+rRelFuzz)*rMean), isn't 0.00033 absolute value? 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 #688280]: How to generate tiny particles in pore space
Question #688280 on Yade changed: https://answers.launchpad.net/yade/+question/688280 Status: Answered => Open Leonard is still having a problem: Many thanks Robert, I am not sure if I got what you mean for using a PSD, could you please give more clues? Following your suggestion, I make an example using makeCloud: ### from yade import pack ## soil particles sp1=pack.SpherePack() sp1.makeCloud((0,0,0),(1,1,1),num=900,rMean=0.04,rRelFuzz=0) sp1.toSimulation(color=[1,1,1]) ## fine particles sp2=pack.SpherePack() sp2.makeCloud((0,0,0),(1,1,1),num=3000,rMean=.005,rRelFuzz=.00033) sp2.toSimulation(color=[0,0.8,0]) Gl1_Sphere.quality=3 # This example is a kind of progress. However, I still have some questions regarding the example above. 1. Some of the tiny particles are inside the body of soil particles. 2. This is for a cloud pack at the beginning, is there any way to generate tiny particles in pore space after the soil particles are compacted. For example, after soil particles are compacted at 100 KPa confining pressure? Thanks, Leonard -- 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 #688275]: Size problem in yade simulation
Question #688275 on Yade changed: https://answers.launchpad.net/yade/+question/688275 Status: Answered => Solved Huang peilun confirmed that the question is solved: Thanks Jan! I tried SoilMat=FrictMat(young=25e9,...) and it works! Now I understand why these spheres go through the cylinder. It's very interesting! -- 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 #688275]: Size problem in yade simulation
Question #688275 on Yade changed: https://answers.launchpad.net/yade/+question/688275 Huang peilun 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
