[Yade-users] [Question #696243]: Rotate cylinder
New question #696243 on Yade:
https://answers.launchpad.net/yade/+question/696243
Hi,
I want rotate this half cylinder 90 degrees in y-axis:
#Cylinderpunch
cyl1
=geom.facetCylinder((0,-0.15,0),8*Diameter,0.07,Quaternion((0,0,1),.5*pi),24,wallMask=4)
cyl1 = [f for f in cyl1 if f.state.pos[0] < 0] # "half-cylinder"
cyl1=O.bodies.append(cyl1)
for j in cyl1:
body= O.bodies[j]
body.state.rot=(0,90,0)
I tried this, but it did not move my cylinder.
Here is my code:
#!/usr/bin/env python
#encoding: ascii
# Testing of the Deformation Enginge with Luding Contact Law
# Modified Oedometric Test
from yade import utils, plot, timing
from yade import pack
import pandas as pd
o = Omega()
# Physical parameters
fr= 0.52
rho = 1050 #kg/m3
Diameter = 0.0079 #79 micrometer
r1= Diameter
r2= Diameter
k1= 126000.0
kp= 12.0*k1
kc= k1 * 0.1
ks= k1 * 0.1
DeltaPMax = Diameter/3.0
Chi1 = 0.34
o.dt = 1.0e-5
particleMass = 4.0/3.0*math.pi*r1*r1*r1*rho
Vi1 = math.sqrt(k1/particleMass)*DeltaPMax*Chi1
PhiF1=0.999
#PhiF1 = DeltaPMax*(kp-k1)*(r1+r2)/(kp*2*r1*r2)
#*
# Add material
mat1 = O.materials.append(LudingMat(frictionAngle=fr, density=rho, k1=k1,
kp=kp, ks=ks, kc=kc, PhiF=PhiF1, G0 = 0.0))
# Spheres for compression
# Spheres for compression
sp=pack.SpherePack()
sp.makeCloud((-9.5*Diameter,-9.5*Diameter,-35.0*Diameter),(9.5*Diameter,9.5*Diameter,15.0*Diameter),
rMean=Diameter/2.0)
#Cylinder cloud sphere pack
cyl = pack.inCylinder((0,0,0),(0,0,20*Diameter),8*Diameter-0.006)
sp = pack.filterSpherePack(cyl,sp,True,material=mat1)
sp.toSimulation(material=mat1)
##No of particles
count = 0
for b in O.bodies:
if isinstance(b.shape, Sphere):
count +=1
##Mass of particles
n_p=count
##
walls=O.bodies.append(yade.geom.facetCylinder((0,0,0),radius=8*Diameter,height=0.066,segmentsNumber=20,wallMask=6,material=mat1))
#height=0.067
##Top punch##
#find max Z coordinate of your cloud
max_z = aabbExtrema()[1][2]
min_z = aabbExtrema()[0][2]
#Top_punch=O.bodies.append(wall((0,0,max_z), axis=2, sense=-1, material=mat1))
#O.bodies[Top_punch].state.vel = (0, 0, -0.01)
#Cylinderpunch
cyl1
=geom.facetCylinder((0,-0.15,0),8*Diameter,0.07,Quaternion((0,0,1),.5*pi),24,wallMask=4)
cyl1 = [f for f in cyl1 if f.state.pos[0] < 0] # "half-cylinder"
cyl1=O.bodies.append(cyl1)
for j in cyl1:
body= O.bodies[j]
body.state.rot=(0,180,0)
for i in cyl1:
body= O.bodies[i]
body.state.vel = (0,1,0)
df = pd.DataFrame(columns=['time','Porosity','Maxoverlap','Stress'])
df.to_csv('PH101_Gao_speed_5.csv')
from csv import writer
def append_list_as_row(file_name, list_of_elem):
# Open file in append mode
with open(file_name, 'a+', newline='') as write_obj:
# Create a writer object from csv module
csv_writer = writer(write_obj)
# Add contents of list as last row in the csv file
csv_writer.writerow(list_of_elem)
# Add engines
o.engines = [
ForceResetter(),
InsertionSortCollider([Bo1_Sphere_Aabb(aabbEnlargeFactor=1.05),
Bo1_Wall_Aabb(),
Bo1_Facet_Aabb()
]),
InteractionLoop(
[Ig2_Sphere_Sphere_ScGeom(interactionDetectionFactor=1.05),
Ig2_Facet_Sphere_ScGeom(),
Ig2_Wall_Sphere_ScGeom()],
[Ip2_LudingMat_LudingMat_LudingPhys()],
[Law2_ScGeom_LudingPhys_Basic()]
),
NewtonIntegrator(damping=0.1, gravity=[0, 0, -9.81]),
#VTKRecorder(fileName='vtk-',recorders=['all'],iterPeriod=1),
#PyRunner(command='checkForce()', realPeriod=1, label="fCheck"),
#PyRunner(command='print(voxelPorosity(resolution=600,start=aabbExtrema()[0],end=aabbExtrema()[1]))',
realPeriod=15),
PyRunner(command='checkdata()', realPeriod=3),
PyRunner(command='checkForce()', realPeriod=1, label="fCheck"),
DeformControl(label="DefControl")
]
def checkdata():
if O.iter < 2:
return
else:
time=o.realtime
porosity=voxelPorosity(resolution=600,start=aabbExtrema()[0],end=aabbExtrema()[1])
Maxoverlap=utils.maxOverlapRatio()
stress=getStress().trace()/3.
row_contents = [time,time,porosity,Maxoverlap,stress]
append_list_as_row('PH101_Gao_speed_5.csv', row_contents)
def checkForce():
# at the very start, unbalanced force can be low as there is only few
# contacts, but it does not mean the packing is stable
if O.iter < 2:
return
# the rest will be run only if unbalanced is < .1 (stabilized packing)
timing.reset()
if unbalancedForce() > 0.2:
return
# add plate at upper box side
highSphere = 0.0
for b in O.bodies:
if highSphere < b.state.pos[2] and isinstance(b.shape, Sphere):
highSphere = b.state.pos[2]
else:
pass
Re: [Yade-users] [Question #696243]: Rotate cylinder
Question #696243 on Yade changed:
https://answers.launchpad.net/yade/+question/696243
Description changed to:
Hi,
How can I rotate this half cylinder 90 degrees in y-axis:
#Cylinderpunch
cyl1
=geom.facetCylinder((0,-0.15,0),8*Diameter,0.07,Quaternion((0,0,1),.5*pi),24,wallMask=4)
cyl1 = [f for f in cyl1 if f.state.pos[0] < 0] # "half-cylinder"
cyl1=O.bodies.append(cyl1)
for j in cyl1:
body= O.bodies[j]
body.state.rot=(0,90,0)
I tried this, but it did not move my cylinder.
Here is my code:
#!/usr/bin/env python
#encoding: ascii
# Testing of the Deformation Enginge with Luding Contact Law
# Modified Oedometric Test
from yade import utils, plot, timing
from yade import pack
import pandas as pd
o = Omega()
# Physical parameters
fr= 0.52
rho = 1050 #kg/m3
Diameter = 0.0079 #79 micrometer
r1= Diameter
r2= Diameter
k1= 126000.0
kp= 12.0*k1
kc= k1 * 0.1
ks= k1 * 0.1
DeltaPMax = Diameter/3.0
Chi1 = 0.34
o.dt = 1.0e-5
particleMass = 4.0/3.0*math.pi*r1*r1*r1*rho
Vi1 = math.sqrt(k1/particleMass)*DeltaPMax*Chi1
PhiF1=0.999
#PhiF1 = DeltaPMax*(kp-k1)*(r1+r2)/(kp*2*r1*r2)
#*
# Add material
mat1 = O.materials.append(LudingMat(frictionAngle=fr, density=rho, k1=k1,
kp=kp, ks=ks, kc=kc, PhiF=PhiF1, G0 = 0.0))
# Spheres for compression
# Spheres for compression
sp=pack.SpherePack()
sp.makeCloud((-9.5*Diameter,-9.5*Diameter,-35.0*Diameter),(9.5*Diameter,9.5*Diameter,15.0*Diameter),
rMean=Diameter/2.0)
#Cylinder cloud sphere pack
cyl = pack.inCylinder((0,0,0),(0,0,20*Diameter),8*Diameter-0.006)
sp = pack.filterSpherePack(cyl,sp,True,material=mat1)
sp.toSimulation(material=mat1)
##No of particles
count = 0
for b in O.bodies:
if isinstance(b.shape, Sphere):
count +=1
##Mass of particles
n_p=count
##
walls=O.bodies.append(yade.geom.facetCylinder((0,0,0),radius=8*Diameter,height=0.066,segmentsNumber=20,wallMask=6,material=mat1))
#height=0.067
##Top punch##
#find max Z coordinate of your cloud
max_z = aabbExtrema()[1][2]
min_z = aabbExtrema()[0][2]
#Top_punch=O.bodies.append(wall((0,0,max_z), axis=2, sense=-1, material=mat1))
#O.bodies[Top_punch].state.vel = (0, 0, -0.01)
#Cylinderpunch
cyl1
=geom.facetCylinder((0,-0.15,0),8*Diameter,0.07,Quaternion((0,0,1),.5*pi),24,wallMask=4)
cyl1 = [f for f in cyl1 if f.state.pos[0] < 0] # "half-cylinder"
cyl1=O.bodies.append(cyl1)
for j in cyl1:
body= O.bodies[j]
body.state.rot=(0,180,0)
for i in cyl1:
body= O.bodies[i]
body.state.vel = (0,1,0)
df = pd.DataFrame(columns=['time','Porosity','Maxoverlap','Stress'])
df.to_csv('PH101_Gao_speed_5.csv')
from csv import writer
def append_list_as_row(file_name, list_of_elem):
# Open file in append mode
with open(file_name, 'a+', newline='') as write_obj:
# Create a writer object from csv module
csv_writer = writer(write_obj)
# Add contents of list as last row in the csv file
csv_writer.writerow(list_of_elem)
# Add engines
o.engines = [
ForceResetter(),
InsertionSortCollider([Bo1_Sphere_Aabb(aabbEnlargeFactor=1.05),
Bo1_Wall_Aabb(),
Bo1_Facet_Aabb()
]),
InteractionLoop(
[Ig2_Sphere_Sphere_ScGeom(interactionDetectionFactor=1.05),
Ig2_Facet_Sphere_ScGeom(),
Ig2_Wall_Sphere_ScGeom()],
[Ip2_LudingMat_LudingMat_LudingPhys()],
[Law2_ScGeom_LudingPhys_Basic()]
),
NewtonIntegrator(damping=0.1, gravity=[0, 0, -9.81]),
#VTKRecorder(fileName='vtk-',recorders=['all'],iterPeriod=1),
#PyRunner(command='checkForce()', realPeriod=1, label="fCheck"),
#PyRunner(command='print(voxelPorosity(resolution=600,start=aabbExtrema()[0],end=aabbExtrema()[1]))',
realPeriod=15),
PyRunner(command='checkdata()', realPeriod=3),
PyRunner(command='checkForce()', realPeriod=1, label="fCheck"),
DeformControl(label="DefControl")
]
def checkdata():
if O.iter < 2:
return
else:
time=o.realtime
porosity=voxelPorosity(resolution=600,start=aabbExtrema()[0],end=aabbExtrema()[1])
Maxoverlap=utils.maxOverlapRatio()
stress=getStress().trace()/3.
row_contents = [time,time,porosity,Maxoverlap,stress]
append_list_as_row('PH101_Gao_speed_5.csv', row_contents)
def checkForce():
# at the very start, unbalanced force can be low as there is only few
# contacts, but it does not mean the packing is stable
if O.iter < 2:
return
# the rest will be run only if unbalanced is < .1 (stabilized packing)
timing.reset()
if unbalancedForce() > 0.2:
return
# add plate at upper box side
highSphere = 0.0
for b in O.bodies:
if highSphere < b.state.pos[2] and isinstance(b.shape, Sphere):
highSphere = b.state.pos[2]
Re: [Yade-users] [Question #696243]: Rotate cylinder
Question #696243 on Yade changed:
https://answers.launchpad.net/yade/+question/696243
Status: Open => Answered
Jan Stránský proposed the following answer:
Hello,
> Here is my code:
most of the code is irrelevant to the problem.
Please try to create a MWE [1], M = minimal (unnecessary code removed, focusing
on the problem)
Your "initial" code would be just fine (with "Diamater" variable defined),
showing the entire problem ("I intended to rotate these bodies, but they are
not rotated")
The rest just scares/discourages potential helpers :-)
state.rot is a method to get relative rotation from initial rotation [1],
something like state.displ().
With your code, you just overwritten the method to the (0,90,0) tuple, try this:
###
Diameter = 0.0079 #79 micrometer
cyl1
=geom.facetCylinder((0,-0.15,0),8*Diameter,0.07,Quaternion((0,0,1),.5*pi),24,wallMask=4)
cyl1 = [f for f in cyl1 if f.state.pos[0] < 0] # "half-cylinder"
cyl1=O.bodies.append(cyl1)
for j in cyl1:
body= O.bodies[j]
print(body.state.rot) # https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.State.rot
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Re: [Yade-users] [Question #696243]: Rotate cylinder
Question #696243 on Yade changed: https://answers.launchpad.net/yade/+question/696243 Jérôme Duriez posted a new comment: Depending on your needs (change the default initial orientation by a 90 degrees rotation, or impose a gradual rotation up to 90 degrees), it is a good YADE habit (for the 2nd case) to go through angular velocities, resp. velocities, and not update directly orientation, resp. position. See https://yade-dem.org/doc/user.html#imposed-velocity (the same may apply for angular velocities and orientation) -- 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 #696243]: Rotate cylinder
Question #696243 on Yade changed: https://answers.launchpad.net/yade/+question/696243 Status: Answered => Solved Mithushan Soundaranathan 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
