Re: [Yade-users] [Question #676609]: problem with createInteraction() command
Question #676609 on Yade changed: https://answers.launchpad.net/yade/+question/676609 Son Pham Thai posted a new comment: Hi Bruno, Thank you very much for the new commit ;) Cheers, Son. -- 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 #676609]: problem with createInteraction() command
Question #676609 on Yade changed: https://answers.launchpad.net/yade/+question/676609 Bruno Chareyre posted a new comment: Son, You script runs smoothly after a change [1] in the source code. yadedaily should be updated soon. Bruno [1] https://github.com/yade/trunk/commit/20f4cf79ed7c4a92659e423ddbc775af7ee1394d -- 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 #676609]: problem with createInteraction() command
Question #676609 on Yade changed: https://answers.launchpad.net/yade/+question/676609 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi Son, As Jerome suggests the apparent contradiction is because the interaction exists in a virtual state: detected by collider, not activated by contact model. It is more likely to happen with enlarged bounds ,but it can happen in the general case to. How to create an interaction when it is already in a virtual state is actually a good question. I'm not sure how to solve it yet. I'll check if it can be fixed in the code. 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 #676609]: problem with createInteraction() command
Question #676609 on Yade changed: https://answers.launchpad.net/yade/+question/676609 Son Pham Thai confirmed that the question is solved: Thanks Bruno Chareyre, 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 #676609]: problem with createInteraction() command
Question #676609 on Yade changed: https://answers.launchpad.net/yade/+question/676609 Status: Answered => Solved Son Pham Thai confirmed that the question is solved: Hi Jérôme, Thank you for your response. O.interactions[39,18] returns this: I am reading about this real and not-real-yet interaction in Yade documentation now. Cheers, Thai-Son -- 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 #676609]: problem with createInteraction() command
Question #676609 on Yade changed: https://answers.launchpad.net/yade/+question/676609 Jérôme Duriez posted a new comment: Hi, Computers are always right: if YADE says "Interaction already exists", the interaction most certainly exists. A possible scenario explaining why you can not detect this interaction could be that this interaction is not real yet (b.intrs() gives real interactions only, for instance). Could you check what O.interactions.has(39,18) says ? (this would be True for a not real interaction as well) -- 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 #676609]: problem with createInteraction() command
New question #676609 on Yade: https://answers.launchpad.net/yade/+question/676609 Hi all, When I used createInteraction() command to manually create intrs between 2 spheres, I got an error: RuntimeError: Interaction #39+#18 already exists. I have then check these 2 spheres #39 and #18: Sphere #39 has no intrs, len(O.bodies[39].intrs()) = 0, while sphere #18 has 7 intrs but #39 is not in the neighboring list of sphere #18. Please see the MWE (Minimal Working Example™) generating this error down below. Please let me know why I have this RuntimeError error? Best regards, Thai-Son PS: I have also tried aabbEnlargeFactor and interactionDetectionFactor but I could not obtain what I want, that's why I have to try doing this createInteraction manually. To be more specified, what I want is that all spheres in the packing has at least 1 intrs. #-- MWE --# # encoding: utf-8 # -- # ### ### INPUT PARAMETERs ### ### seed0=1 # = 1 -> same packing everytime distributeMass0=False # True -> Mass fraction, False -> PARTICLE COUNT fraction num_spheres0=200 mx=Vector3(.4e-2,.6e-2,.4e-2) # size of aggregate mn=Vector3(0,0,0) porosity0=0.4 rRelFuzz0=0.7 # for the case of polydisperse compFricDegree = 15.0 # initial contact friction during the confining phase (will be decreased during the REFD compaction process) confiningS=-1e5 surfaceTension=0.07274 # [N/m] young0= 50e9 # 50 GPa poisson0= 0.2 density0 = 2530 # 2.53 g/cm3 = 2530 kg/m3 tensileStrength = 3.3e9 # 3.3 GPa shearStrength = 3.3e9 # 3.3 GPa ## GENERATING PARTICLE PACKING ### from yade import pack import pylab O.materials.append(CohFrictMat(young=young0,poisson=poisson0,density=density0,frictionAngle=radians(compFricDegree), normalCohesion=tensileStrength, shearCohesion=shearStrength, momentRotationLaw=True,etaRoll=0.1,label='spheres')) O.materials.append(FrictMat(young=young0,poisson=poisson0,frictionAngle=0,density=0,label='frictionlessWalls')) walls=aabbWalls((mn,mx),thickness=0,material='frictionlessWalls') wallIds=O.bodies.append(walls) ### Aggregate generation ### num_spheres1D=int(round(num_spheres0**(1./3))) # for calculation of rMean0 sp=pack.SpherePack() rMean0=(1-rRelFuzz0) * ((mx[0]/num_spheres1D)/2) # Irregular case, in order to obtain: num_spheres_real not less than num_spheres sp.makeCloud(minCorner=mn,maxCorner=mx,rMean=rMean0,rRelFuzz=rRelFuzz0,porosity=porosity0,num=num_spheres0,distributeMass=distributeMass0,seed=seed0) O.bodies.append([utils.sphere(center,rad,material='spheres') for center,rad in sp]) ### mechanical loading To confer a solid-like nature to the packing triax=TriaxialStressController( internalCompaction=True, goal1=confiningS, goal2=confiningS, goal3=confiningS, max_vel=10, label="triax" ) newton=NewtonIntegrator(damping=0.4) unsat=UnsaturatedEngine(dead=1,label="unsat") # --- O.engines=[ ForceResetter(), ### Collsion detector InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Box_Aabb()]), ### Interaction handling InteractionLoop( [Ig2_Sphere_Sphere_ScGeom6D(),Ig2_Box_Sphere_ScGeom()], [Ip2_FrictMat_FrictMat_FrictPhys(),Ip2_CohFrictMat_CohFrictMat_CohFrictPhys(label="cohesiveIp")], [Law2_ScGeom_FrictPhys_CundallStrack(),Law2_ScGeom6D_CohFrictPhys_CohesionMoment( useIncrementalForm=True, #useIncrementalForm is turned on as we want plasticity on the contact moments always_use_moment_law=False, #if we want "rolling" friction even if the contact is not cohesive (or cohesion is broken), we will have to turn this true somewhere label='cohesiveLaw')] ), GlobalStiffnessTimeStepper(active=1,timeStepUpdateInterval=1,timestepSafetyCoefficient=0.5), triax, newton ] # --- numDEMiter1stDEMloop=3000 numDEMiter2ndDEMloop=2000 numDEMiter3rdDEMloop=500 numDEMiterPerDryIter=250 while 1: O.run(numDEMiter1stDEMloop,True) unb=unbalancedForce() if unb<0.01 and abs(triax.goal1-triax.meanStress)/abs(triax.goal1)<0.001: break ## REACH NEW EQU. STATE ### finalFricDegree = 30 # contact friction during the deviatoric loading # We move to deviatoric loading, let us turn internal compaction off to keep particles sizes constant triax.internalCompaction=False # Change contact friction (remember that decreasing it would generate instantaneous instabilities) setContactFriction(radians(finalFricDegree))
