Re: [Yade-users] [Question #641619]: strain - stress curve of three point bending test
Question #641619 on Yade changed: https://answers.launchpad.net/yade/+question/641619 Status: Answered => Open Tina Asia is still having a problem: Hi Jan, Could you tell me the algorithm of calculating the stress-strain relationship in YADE? I will do that by writing my own code. Thanks in advance, Tina -- 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 #641619]: strain - stress curve of three point bending test
New question #641619 on Yade: https://answers.launchpad.net/yade/+question/641619 Hi, How to calculate the strain-stress curve in a three-point bending test? I have read some similar questions about strain-stress curve, but still have no idea to do this. I created my sample using jcfpmmat. I have got the strain-stress curve when my sample was compressed in a uniaxial compression using UniaxialStrainer (https://yade-dem.org/doc/yade.wrapper.html?highlight=strain#yade.wrapper.UniaxialStrainer). However, in a three-point bending test, I really have no any idea to work out it. Can anyone give me some hints or tips to do this? Thanks in advance, Tina -- 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 #626814]: Calculate the particle size distribution after particle crushing
Question #626814 on Yade changed: https://answers.launchpad.net/yade/+question/626814 Status: Answered => Open Tina Asia is still having a problem: Hi Jan, Sorry for my delay, I can not understand * in your former reply. I have modified your function, but still got the ids of those particles rather than their sizes because of their varied radius. Your reply will be highly apperciated. Many thanks, Tina -- 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 #625502]: How to get the minimum porosity of packing using randomDensePack
Question #625502 on Yade changed: https://answers.launchpad.net/yade/+question/625502 Status: Open => Answered Tina Asia proposed the following answer: Hi Huihuang, I just posted a same question here: https://answers.launchpad.net/yade/+question/630281 https://answers.launchpad.net/yade/+question/628632 Jan answered my two questions, and I have tried Jan's methods. They really work well for my simulations. Cheers, Tina @ Yade -- 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 #630281]: randomDensePack explodes because of penetrationDepth
Question #630281 on Yade changed: https://answers.launchpad.net/yade/+question/630281 Tina Asia 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
Re: [Yade-users] [Question #630281]: randomDensePack explodes because of penetrationDepth
Question #630281 on Yade changed: https://answers.launchpad.net/yade/+question/630281 Status: Answered => Solved Tina Asia confirmed that the question is solved: Thanks Jan, Sorry for my carelessness! Thanks for your patience! Tina -- 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 #630281]: randomDensePack explodes because of penetrationDepth
Question #630281 on Yade changed: https://answers.launchpad.net/yade/+question/630281 Status: Answered => Open Tina Asia is still having a problem: Hi Jan, Thanks for your help, but I still got a explosion. Here is my script: from yade import pack from yade import qt,utils stone=CohFrictMat(young=5.0e10,poisson=0.25,density=2640,frictionAngle=radians(18),isCohesive=True,normalCohesion=4.5e6,shearCohesion=4.5e7,momentRotationLaw=True) O.materials.append(stone) steel=CohFrictMat(young=3.06e11,poisson=0.29,density=7861,frictionAngle=0.545,normalCohesion=0,shearCohesion=0) O.materials.append(steel) pred=pack.inSphere((0,0,0.5),0.25) #sphs=pack.regularHexa(pred,radius=0.01,gap=0,material=stone) sphs=pack.randomDensePack(pred,radius=0.025,rRelFuzz=0,material=stone) O.bodies.append(sphs) for i in sphs: velocity=i.state.vel=(0,0,-25) O.bodies.append(geom.facetBox((0,0,0.2),(0.3,0.3,0.003),material=steel)) O.engines=[ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(aabbEnlargeFactor=1.5),Bo1_Facet_Aabb()]), InteractionLoop( [Ig2_Sphere_Sphere_ScGeom6D(interactionDetectionFactor=1.5),Ig2_Facet_Sphere_ScGeom6D()], [Ip2_CohFrictMat_CohFrictMat_CohFrictPhys(setCohesionNow=True)], [Law2_ScGeom6D_CohFrictPhys_CohesionMoment()] ), #VTKRecorder(fileName='post/0deg-',recorders=['all'],iterPeriod=50), #GlobalStiffnessTimeStepper(active=1,timeStepUpdateInterval=5,timestepSafetyCoefficient=0.8,defaultDt=PWaveTimeStep()), NewtonIntegrator(damping=0.3,gravity=(0,0,-9.81)), ] O.dt = 0 for i in O.interactions: i.phys.unp = i.geom.penetrationDepth O.dt=0.3e-7 qt.Controller() qt.View() Recently, I have tried many methods: As it was posted in https://answers.launchpad.net/yade/+question/266828, I added this code segment into my script, but also failed: O.bodies.dynamic=False O.step() for j in O.interactions: j.phys.unp = j.geom.penetrationDepth O.bodies.dynamic=True O.dt=0.3e-7 I guess the explosion was a consequence of the repulsive force was greater than the bonded strength between contacting particles. Thanks for your patience! Tina @ Yade -- 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 #628632]: Modeling particle breakage in YADE
Question #628632 on Yade changed: https://answers.launchpad.net/yade/+question/628632 Status: Open => Solved Tina Asia confirmed that the question is solved: Thanks Jan, I have got a desired porosity (about 0.27) packing using randomDensePack and growParticles. Thus, there is no need to write a function compressing irregular shapes. But, this packing always ‘explodes’ because of particles' penetrationDepth. I have searched some questions in LaunchPad, but those methods all failed. As my new question was posted here: https://answers.launchpad.net/yade/+question/630281 Thanks for your patience. Regards, Tina @ Yade -- 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 #628632]: Modeling particle breakage in YADE
Question #628632 on Yade changed: https://answers.launchpad.net/yade/+question/628632 Status: Answered => Open Tina Asia is still having a problem: Thanks Jan, I am a new user of Yade, and I have studied yade just over 2 months, but I still have a great passion and interests on Yade. I have studied the source code of randomDensePack, but I have no any idea to write my own code compressing the packing using arbitrary shape. Can you give me some hints. Many thanks! Tina @yade -- 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 #630281]: randomDensePack explodes because of penetrationDepth
New question #630281 on Yade: https://answers.launchpad.net/yade/+question/630281 Hi, I have created a spherical packing using randomDensePack without giving spheresInCell, but when I using this packing in my simulation, this packing explodes. I add i.phys.unp=i.geom.penetrationDepth, but this method also failed. Here is my code: from yade import pack from yade import qt,utils stone=CohFrictMat(young=5.0e10,poisson=0.25,density=2640,frictionAngle=radians(18),isCohesive=True,normalCohesion=4.5e6,shearCohesion=4.5e7,momentRotationLaw=True) O.materials.append(stone) steel=CohFrictMat(young=3.06e11,poisson=0.29,density=7861,frictionAngle=0.545,normalCohesion=0,shearCohesion=0) O.materials.append(steel) pred=pack.inSphere((0,0,0.5),0.25) #sphs=pack.regularHexa(pred,radius=0.01,gap=0,material=stone) sphs=pack.randomDensePack(pred,radius=0.025,rRelFuzz=0,material=stone) O.bodies.append(sphs) for i in sphs: #global velocity velocity=i.state.vel=(0,0,-25) O.bodies.append(geom.facetBox((0,0,0.2),(0.3,0.3,0.003),material=steel)) O.engines=[ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(aabbEnlargeFactor=1.5),Bo1_Facet_Aabb()]), InteractionLoop( [Ig2_Sphere_Sphere_ScGeom6D(interactionDetectionFactor=1.5),Ig2_Facet_Sphere_ScGeom6D()], [Ip2_CohFrictMat_CohFrictMat_CohFrictPhys(setCohesionNow=True)], [Law2_ScGeom6D_CohFrictPhys_CohesionMoment()] ), VTKRecorder(fileName='post/0deg-',recorders=['all'],iterPeriod=50), GlobalStiffnessTimeStepper(active=1,timeStepUpdateInterval=5,timestepSafetyCoefficient=0.8,defaultDt=PWaveTimeStep()), NewtonIntegrator(damping=0.3,gravity=(0,0,-9.81)), ] O.trackEnergy=True O.dt=utils.PWaveTimeStep() O.usesTimeStepper=True qt.Controller() qt.View() O.run(1,True) for i in O.interactions: i.phys.unp=i.geom.penetrationDepth BTW: when i using regularHexa packing, there is no error. Thanks in advances. Tina -- 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 #628632]: Modeling particle breakage in YADE
Question #628632 on Yade changed: https://answers.launchpad.net/yade/+question/628632 Tina Asia gave more information on the question: Hi Jan, Thanks for your reply, I tried randomDensePack withous gives spheresInCell, but I got a very unstable simulation, once it run, all spheres fly around. The simulation just gave some warnings without errors. Here is my code: from yade import pack from yade import qt,utils stone=CohFrictMat(young=5.0e10,poisson=0.25,density=2640,frictionAngle=radians(18),isCohesive=True,normalCohesion=4.5e6,shearCohesion=4.5e7,momentRotationLaw=True) O.materials.append(stone) steel=CohFrictMat(young=3.06e11,poisson=0.29,density=7861,frictionAngle=0.545,normalCohesion=0,shearCohesion=0) O.materials.append(steel) pred=pack.inSphere((0,0,0.5),0.25) #sphs=pack.regularHexa(pred,radius=0.01,gap=0,material=stone) sphs=pack.randomDensePack(pred,radius=0.025,rRelFuzz=0,material=stone) O.bodies.append(sphs) for i in sphs: #global velocity velocity=i.state.vel=(0,0,-25) O.bodies.append(geom.facetBox((0,0,0.2),(0.3,0.3,0.003),material=steel)) O.engines=[ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(aabbEnlargeFactor=1.5),Bo1_Facet_Aabb()]), InteractionLoop( [Ig2_Sphere_Sphere_ScGeom6D(interactionDetectionFactor=1.5),Ig2_Facet_Sphere_ScGeom6D()], [Ip2_CohFrictMat_CohFrictMat_CohFrictPhys(setCohesionNow=True)], [Law2_ScGeom6D_CohFrictPhys_CohesionMoment()] ), VTKRecorder(fileName='post/0deg-',recorders=['all'],iterPeriod=50), GlobalStiffnessTimeStepper(active=1,timeStepUpdateInterval=5,timestepSafetyCoefficient=0.8,defaultDt=PWaveTimeStep()), NewtonIntegrator(damping=0.3,gravity=(0,0,-9.81)), ] O.trackEnergy=True O.step() O.dt=utils.PWaveTimeStep() O.usesTimeStepper=True qt.Controller() qt.View() But when I tried regularHexa packing, I got a very stable simulation. Thanks in advance. -- 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 #628632]: Modeling particle breakage in YADE
Question #628632 on Yade changed: https://answers.launchpad.net/yade/+question/628632 Status: Answered => Open Tina Asia is still having a problem: Hi Tina, Thanks for your reply, I tried randomDensePack withous gives spheresInCell, but I got a very unstable simulation, once it run, all spheres fly around. The simulation just gave some warnings without errors. Here is my code: from yade import pack from yade import qt,utils stone=CohFrictMat(young=5.0e10,poisson=0.25,density=2640,frictionAngle=radians(18),isCohesive=True,normalCohesion=4.5e6,shearCohesion=4.5e7,momentRotationLaw=True) O.materials.append(stone) steel=CohFrictMat(young=3.06e11,poisson=0.29,density=7861,frictionAngle=0.545,normalCohesion=0,shearCohesion=0) O.materials.append(steel) pred=pack.inSphere((0,0,0.5),0.25) #sphs=pack.regularHexa(pred,radius=0.01,gap=0,material=stone) sphs=pack.randomDensePack(pred,radius=0.025,rRelFuzz=0,material=stone) O.bodies.append(sphs) for i in sphs: #global velocity velocity=i.state.vel=(0,0,-25) O.bodies.append(geom.facetBox((0,0,0.2),(0.3,0.3,0.003),material=steel)) O.engines=[ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(aabbEnlargeFactor=1.5),Bo1_Facet_Aabb()]), InteractionLoop( [Ig2_Sphere_Sphere_ScGeom6D(interactionDetectionFactor=1.5),Ig2_Facet_Sphere_ScGeom6D()], [Ip2_CohFrictMat_CohFrictMat_CohFrictPhys(setCohesionNow=True)], [Law2_ScGeom6D_CohFrictPhys_CohesionMoment()] ), VTKRecorder(fileName='post/0deg-',recorders=['all'],iterPeriod=50), GlobalStiffnessTimeStepper(active=1,timeStepUpdateInterval=5,timestepSafetyCoefficient=0.8,defaultDt=PWaveTimeStep()), NewtonIntegrator(damping=0.3,gravity=(0,0,-9.81)), ] O.trackEnergy=True O.step() O.dt=utils.PWaveTimeStep() O.usesTimeStepper=True qt.Controller() qt.View() But when I tried regularHexa packing, I got a very stable simulation. Thanks in advance. -- 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 #628632]: Modeling particle breakage in YADE
New question #628632 on Yade: https://answers.launchpad.net/yade/+question/628632 HI, I created a complex structure in a CAD code and exported it as *.gts. In YADE, I filled this *.gts using cohfrictmat model and randomdensepack. But to my disappointment, the porosity of this packing is greater than 0.7. Actually, I want to model breakage of this brittle material whose porosity is no greater than 0.3. Besides, I also tried regularHexa, but this approach also got a lower solid fraction. Recently, I checked the following questions: https://answers.launchpad.net/yade/+question/473518 and https://answers.launchpad.net/yade/+question/625502, in those questions, triaxial compression was recommanded to get a desired porosity, but ,in my simulations, a irregular boundary was used, triaxial compression also works on irregular packing?? Besides, I tried filterSpherePack function proposed in https://answers.launchpad.net/yade/+question/246971, but after the generation of a compressed cubic packing, I failed filter my irregular packing from the cubic packing and exported my packing. https://answers.launchpad.net/yade/+question/625502 shares a very similar problem with me, but this question has not be solved yet. Thanks in advance, Tina -- 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 #626814]: Calculate the particle size distribution after particle crushing
New question #626814 on Yade: https://answers.launchpad.net/yade/+question/626814 Hello, In my simulation, a cohfrictmat was used to define cohesive bonds between discrete elements which consist of a packing. After this packing crushing under dynamic loads, whether the particle size distribution can be calculated?? https://answers.launchpad.net/yade/+question/292911, gives a reference, but I tried add this function to my code, it only got set[n1,n2], not the particle size distribution. Can you help me solve this problem? Thanks! Tina, NTU -- 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 #432617]: How to plot damage ratio curve
Question #432617 on Yade changed: https://answers.launchpad.net/yade/+question/432617 Status: Answered => Solved Tina Asia 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 #432617]: How to plot damage ratio curve
Question #432617 on Yade changed:
https://answers.launchpad.net/yade/+question/432617
Status: Answered => Open
Tina Asia is still having a problem:
Hi Luc,
Thanks for your patience, I adjusted my code and It goes well, but the
output is wrong,because the number of broken bonds does not grow
gradually with the increase of computation time (number of broken bonds:
1,23,42,32,15...). Here is a segment of my code.
O.step()
# calculate the total intact cohesive bonds
global sumCohBonds
sumCohBonds=0
for b in O.interactions:
if b.phys.cohesionBroken==True:
continue
sumCohBonds+=1
print 'first time:{}'.format(sumCohBonds)
numBroCohBonds=0
def damageRatio():
for br in O.interactions:
if br.phys.cohesionBroken==False:
continue
numBroCohBonds+=1# calculate broken bonds
damageRatio=numBroCohBonds/float(sumCohBonds)
print numBroCohBonds,damageRatio
print 'second time:{}'.format(sumCohBonds)
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Re: [Yade-users] [Question #432617]: How to plot damage ratio curve
Question #432617 on Yade changed:
https://answers.launchpad.net/yade/+question/432617
Status: Answered => Open
Tina Asia is still having a problem:
Thanks Luc,
According to your code, I wrote the following script, but got an error (File
"impact.py", line 104, in
damageRatio=numBroCohBonds/sumCohBonds
ZeroDivisionError: integer division or modulo by zero)
Here is a segment of my code:
#calculate total intact cohesive bonds
global sumCohBonds
sumCohBonds=0
for b in O.interactions:
if b.phys.cohesionBroken==True:
continue
sumCohBonds+=1
#define a function to calculate broken cohesive bonds
global damageRatio
numBroCohBonds=0
def damageRatio():
for b in O.interactions:
if not b.isReal:
continue
if b.phys.cohesionBroken==True:
numBroCohBonds+=1
damageRatio=numBroCohBonds/sumCohBonds
plot.saveDataTxt('data/damageratio.txt')
#define a function to plot damage ratio
def addPlotData():
plot.addData(t=O.time,dr=damageRatio)
plot.plots={'t':('dr')}
plot.plot()
Thanks in advance.
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Re: [Yade-users] [Question #497350]: Export a polyhedron into a *.stl or * .gts file
Question #497350 on Yade changed: https://answers.launchpad.net/yade/+question/497350 Tina Asia posted a new comment: Hi Jan, I have tried this code in Yade 1.20, and It gets a correct result. Anyway, thank you very much. The latest version (2017.01a) may contain a bug. Best regards, Tina -- 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 #497350]: Export a polyhedron into a *.stl or * .gts file
Question #497350 on Yade changed: https://answers.launchpad.net/yade/+question/497350 Status: Answered => Solved Tina Asia 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
Re: [Yade-users] [Question #497350]: Export a polyhedron into a *.stl or * .gts file
Question #497350 on Yade changed: https://answers.launchpad.net/yade/+question/497350 Tina Asia posted a new comment: Thanks Jan, I just ran this code in my yade2017.01a, but it still failed. I guess something wrong happens when I copy the code, please send this code in .py format to my E-mail:1014198...@qq.com Thanks for your patience, Best regards. Tina -- 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 #497350]: Export a polyhedron into a *.stl or * .gts file
Question #497350 on Yade changed:
https://answers.launchpad.net/yade/+question/497350
Status: Answered => Open
Tina Asia is still having a problem:
Jan,
Thanks for your patience, but the error---"Can't open file: tina.st" still
exists. I guess there is something wrong with the code---"poly2stl" ,although
the *.stl can be displayed in Meshlab and looks identical with polyhedron
generated in Yade.
Besides, I converted *.stl to *.gts using stl2gts, and using the following code
to fill this polyhedron, but it got a cuboid package.
I replaced this *.gts with horse.coarse.gts, and this one got correct result.
Thus, I guess the poly2stl outputs something wrong, please check this
code---poly2stl.
Many thanks.
My code was as following:
from yade import ymport
from yade import pack
surface=gts.read(open('poly.gts'))
pred=pack.inGtsSurface(surface)
assembly=pack.randomDensePack(pred,radius=0.001,rRelFuzz=0.3,spheresInCell=500)
O.bodies.append(assembly)
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Re: [Yade-users] [Question #497350]: Export a polyhedron into a *.stl or * .gts file
Question #497350 on Yade changed:
https://answers.launchpad.net/yade/+question/497350
Status: Answered => Open
Tina Asia is still having a problem:
Hi Jan,
Thanks for your patience, but I got an error by importing the *.stl file
generated by the above code. The error and my new code are as follows.
from yade import ymport
from yade import pack
from yade import qt
pred=O.bodies.append(ymport.stl('tina.stl'))
spheres=pack.randomDensePack(pred,radius=0.001,rRelFuzz=0.3,spheresInCell=500,color=(1,0,1))
O.bodies.append(spheres)
qt.View()
qt.Controller()
I got this error:
$ yade fillsphere.pyWelcome to Yade 2017.01a
TCP python prompt on localhost:9000, auth cookie `sdcaek'
XMLRPC info provider on http://localhost:21000
Running script fillsphere.py
ERROR /home/tina/YADE/trunk/pkg/dem/STLImporter.cpp:23 import: Can't open file:
tina.stl
Traceback (most recent call last):
File "/home/tina/YADE/install/bin/yade", line 182, in runScript
execfile(script,globals())
File "fillsphere.py", line 6, in
spheres=pack.randomDensePack(pred,radius=0.001,rRelFuzz=0.3,spheresInCell=500,color=(1,0,1))
File "/home/tina/YADE/install/lib/x86_64-linux-gnu/yade/py/yade/pack.py",
line 490, in randomDensePack
if not dim: dim=predicate.dim()
AttributeError: 'list' object has no attribute 'dim'
[[ ^L clears screen, ^U kills line. F12 controller, F11 3d view (use h-key for
showing help), F10 both, F9 generator, F8 plot. ]]
Besides, I also tried pack.inConvexPolyhedron (https://www.yade-
dem.org/doc/yade.pack.html?highlight=pack.in#yade.pack.inConvexPolyhedron)
to fill a polyhedron with many sub-particles, but this one got error
too:
This is my code:
from yade import polyhedra_utils
rock = PolyhedraMat()
rock.IsSplitable = True
rock.strength = 6e3
poly = polyhedra_utils.polyhedra(rock, size=(0.01,0.02,0.01), seed=1)
O.bodies.append(poly)
pred=pack.inConvexPolyhedron(poly)
aabb=pred.aabb()
dim0=aabb[1][0]-aabb[0][0]
spheres=O.bodies.append(pack.randomDensePack(pred,radius=0.001,rRelFuzz=0.3,spheresInCell=300))
O.bodies.append(spheres)
from yade import qt
qt.View()
qt.Controller()
and this is the error:
~/Desktop/polyhedra$ yade poly.py
Welcome to Yade 2017.01a
TCP python prompt on localhost:9000, auth cookie `yudssc'
XMLRPC info provider on http://localhost:21000
Running script poly.py
Traceback (most recent call last):
File "/home/tina/YADE/install/bin/yade", line 182, in runScript
execfile(script,globals())
File "poly.py", line 10, in
pred=pack.inConvexPolyhedron(poly)
File "/home/tina/YADE/install/lib/x86_64-linux-gnu/yade/py/yade/pack.py",
line 208, in __init__
self._inHalfSpaces = [inHalfSpace(c,d) for c,d in planes]
TypeError: 'Body' object is not iterable
[[ ^L clears screen, ^U kills line. F12 controller, F11 3d view (use h-key for
showing help), F10 both, F9 generator, F8 plot. ]]
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Re: [Yade-users] [Question #497350]: Export a polyhedron into a *.stl or * .gts file
Question #497350 on Yade changed: https://answers.launchpad.net/yade/+question/497350 Status: Answered => Open Tina Asia is still having a problem: Thanks Jan, My goal is to fill this polyhedron with some sub-particles, export *.stl may be an unwise decision. Is there any better method to finish this task?? Tina, NTU -- 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 #497350]: Export a polyhedron into a *.stl or * .gts file
Question #497350 on Yade changed:
https://answers.launchpad.net/yade/+question/497350
Status: Answered => Open
Tina Asia is still having a problem:
Hi,
Jan, I have tried your code, but the *.stl only contains some triangles,
My code is as follows (My YADE is the latest vision):
from yade import polyhedra_utils
from yade import export
from yade import plot
from yade import qt
gravel = PolyhedraMat()
gravel.IsSplitable = True
gravel.strength = 7.9e6
gravel.density = 2678#kg/m^3
gravel.young = 5.98e7 #Pa
gravel.poisson =0.3
gravel.frictionAngle = 0.5 #rad
#create a polyhedron
poly=polyhedra_utils.polyhedra(material=gravel,size=(0.05,0.05,0.05),seed=1)
O.bodies.append(poly)
poly.state.pos=(0,0,0.025)
def polyhedra2stl(stl): # stl is string file name, e.g. 'test.stl'
# get triangles
trisCoords = []
for b in O.bodies:
if not isinstance(b.shape,Polyhedra): # skip non-polyhedra bodies
continue
vs = [b.state.pos + b.state.ori*v for v in b.shape.v] # vertices in
global coords
trisIds = b.shape.GetSurfaceTriangulation() # "triangles" in one array
l = len(trisIds) / 3
trisIds = [trisIds[3*i:3*i+3] for i in range(l)] # triangles as array
of three indices
for t in trisIds:
trisCoords.append([vs[i] for i in t]) # triangles as coords of its
vertices
# generate content of stl file, see [1]
lines = ['solid polyhedra']
for v1,v2,v3 in trisCoords:
n = (v2-v1).cross(v3-v1)
lines.append('facet normal {} {} {}'.format(n[0],n[1],n[2]))
lines.append(' outer loop')
for v in (v1,v2,v3):
lines.append(' vertex {} {} {}'.format(v[0],v[1],v[2]))
lines.append(' endloop')
lines.append('endfacet')
lines.append('endsolid polyhedra')
# write to file
with open(stl,'w') as f:
f.writelines(l+'\n' for l in lines)
polyhedra2stl('tina.stl')
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Re: [Yade-users] [Question #497350]: Export a polyhedron into a *.stl or * .gts file
Question #497350 on Yade changed: https://answers.launchpad.net/yade/+question/497350 Status: Answered => Open Tina Asia is still having a problem: Hi, Thanks Jan, I tried some methods to convert *.txt to *.stl, but all failed, Can you give me a help? Thanks in advance, Tina -- 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 #406774]: Translation engine can not work
Question #406774 on Yade changed: https://answers.launchpad.net/yade/+question/406774 Status: Answered => Solved Tina Asia 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
Re: [Yade-users] [Question #406774]: Translation engine can not work
Question #406774 on Yade changed: https://answers.launchpad.net/yade/+question/406774 Status: Answered => Open Tina Asia is still having a problem: Hello, Thanks Jan, 'can not move' means that the upper platen can not move downwoards with a velocity which is set in the translationEngine. According to your advice, .mesh files were attached as follows. Thanks for your patience. bottom_platen.mesh: MeshVersionFormatted 2 Dimension 3 Vertices 108 0 010 1 44.6841506958015.32229280471810 1 43.741031646729 10.56987190246610 1 42.183883666992 15.66907405853310 1 40.034568786621 20.54831504821810 1 37.32325744628925.1391048431410 1 34.08800506591829.3769950866710 1 30.374235153198 33.20249938964810 1 26.234077453613 36.56190872192410 1 21.725648880005 39.40807342529310 1 16.912240982056 41.70103073120110 1 11.861422538757 43.40859985351610 1 6.6440954208374 44.50680923461910 1 1.333499789238 44.98023605346710 1 -3.9958152770996 44.82224273681610 1 -9.2690382003784 44.03504180908210 1 -14.412143707275 42.62968444824210 1 -19.352933883667 40.62590408325210 1 -24.022052764893 38.05181884765610 1 -28.353952407837 34.94357299804710 1 -32.287826538086 31.34479713439910 1 -35.768451690674 27.30600738525410 1 -38.746963500977 22.88389968872110 1 -41.181552886963 18.14055442810110 1 -43.03804397583 13.14255428314210 1 -44.290374755859 7.960062503814710 1 -44.920967102051 2.665828227996810 1 -44.920967102051 -2.665828227996810 1 -44.290374755859 -7.960062503814710 1 -43.03804397583 -13.14255428314210 1 -41.181552886963 -18.14055442810110 1 -38.746963500977 -22.88389968872110 1 -35.768451690674 -27.30600738525410 1 -32.287826538086 -31.34479713439910 1 -28.353952407837 -34.94357299804710 1 -24.022052764893 -38.05181884765610 1 -19.352933883667 -40.62590408325210 1 -14.412143707275 -42.62968444824210 1 -9.2690382003784 -44.03504180908210 1 -3.9958152770996 -44.82224273681610 1 1.333499789238 -44.98023605346710 1 6.6440954208374 -44.50680923461910 1 11.861422538757 -43.40859985351610 1 16.912240982056 -41.70103073120110 1 21.725648880005 -39.40807342529310 1 26.234077453613 -36.56190872192410 1 30.374235153198 -33.20249938964810 1 34.088005065918 -29.3769950866710 1 37.323257446289 -25.1391048431410 1 40.034568786621 -20.54831504821810 1 42.183883666992 -15.66907405853310 1 43.741031646729 -10.56987190246610 1 44.684150695801 -5.32229280471810 1 45 010 1 45 0 0 1 44.6841506958015.322292804718
Re: [Yade-users] [Question #406774]: Translation engine can not work
Question #406774 on Yade changed:
https://answers.launchpad.net/yade/+question/406774
Status: Answered => Open
Tina Asia is still having a problem:
Hello,
Thanks Jerome and Jan, my code got no error but the upper platen still fixed.
According to Jan's advice, my code got an error and the particle assembly
disintegrated, sub-particles flew here and there. The error is here:
huihuang@huihuang-Aspire-F5-572G:~$ cd Desktop/single_particle
huihuang@huihuang-Aspire-F5-572G:~/Desktop/single_particle$ yade BPM.py
Welcome to Yade 1.20.0
TCP python prompt on localhost:9000, auth cookie `skcsyd'
XMLRPC info provider on http://localhost:21000
Running script BPM.py
No suitable packing in database found, running PERIODIC compression
/usr/lib/x86_64-linux-gnu/yade/py/yade/pack.py:296: FutureWarning: The default
behavior will change; specify returnSpherePack=True for the new behavior, and
False to get rid of this warning (your code will break in the future, however).
The returned SpherePack object can be added to the simulation using
SpherePack.toSimulation()
warnings.warn('The default behavior will change; specify
returnSpherePack=True for the new behavior, and False to get rid of this
warning (your code will break in the future, however). The returned SpherePack
object can be added to the simulation using
SpherePack.toSimulation()',category=FutureWarning)
Traceback (most recent call last):
File "/usr/bin/yade", line 182, in runScript
execfile(script,globals())
File "BPM.py", line 26, in
TranslationEngine(translationAxis=(0,0,-1),velocity=0.09,ids=[upper_platen],label='trans'),
TypeError: No registered converter was able to produce a C++ rvalue of type int
from this Python object of type list
[[ ^L clears screen, ^U kills line. F12 controller, F11 3d view (use h-key for
showing help), F10 both, F9 generator, F8 plot. ]]
Yade [1]:
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[Yade-users] [Question #406774]: Translation engine can not work
New question #406774 on Yade:
https://answers.launchpad.net/yade/+question/406774
Hi,
I am a new user of YADE, and I want to simulate a single particle crushing
under compression. But, the upper platen can not move without any error.my code
is as follows:
please help me to solve this trouble, many thanks.
from yade import ymport
from yade import pack
from yade import qt
# define materials for particles assembly and rigid platen #
rock=O.materials.append(CohFrictMat(young=5.98e7,poisson=0.3,density=2678,frictionAngle=0.5,normalCohesion=7.9e6,shearCohesion=7.9e6,momentRotationLaw=True))
steel=O.materials.append(FrictMat(young=3.06e11,poisson=0.29,density=7861,frictionAngle=0.545))
# create a partcicle assembly in a sphere
pred=pack.inSphere((0,0,0.05),0.035)
spheres=pack.randomDensePack(pred,radius=0.001,spheresInCell=100,rRelFuzz=0.2)
O.bodies.append(spheres)
# import platens for this simulation
bottom_platen=O.bodies.append(ymport.gmsh('Desktop/single_particle/bottom_platen.mesh',scale=0.001,color=(1,1,0),material=steel))
upper_platen=O.bodies.append(ymport.gmsh('Desktop/single_particle/upper_platen.mesh',scale=0.001,color=(1,0,0),material=steel))
# engines #
O.engines=[
ForceResetter(),
InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Facet_Aabb(),Bo1_Wall_Aabb()]),
InteractionLoop(
[Ig2_Sphere_Sphere_ScGeom6D(interactionDetectionFactor=1.1),Ig2_Facet_Sphere_ScGeom(),Ig2_Wall_Sphere_ScGeom()],
[Ip2_FrictMat_FrictMat_FrictPhys(),Ip2_CohFrictMat_CohFrictMat_CohFrictPhys(setCohesionNow=True)],
[Law2_ScGeom_FrictPhys_CundallStrack(),Law2_ScGeom6D_CohFrictPhys_CohesionMoment()]
),
TranslationEngine(translationAxis=(0,0,-1),velocity=0.09,ids=upper_platen,label='trans'),
NewtonIntegrator(gravity=(0,0,-9.81)),
#VTKRecorder(fileName='post/comp-',recorders=['all'],iterPeriod=100)
]
# 3D view & controller
qt.View()
qt.Controller()
# set timestep & run this simulation
O.dt=0.3*PWaveTimeStep()
#O.run()
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