Question #698303 on Yade changed:
https://answers.launchpad.net/yade/+question/698303
ibraheem khan posted a new comment:
sorry Robert....
my script is here .
from yade import pack, export, ymport
nRead=readParamsFromTable(
num_spheres=1000,
compFricDegree = 25,
key='_triax_base_'
unknownOk=True
)
from yade.params import table
num_spheres=table.num_spheres
key=table.key
targetPorosity = 0.45
compFricDegree = table.compFricDegree
finalFricDegree =25
rate=-0.02
damp=0.2
stabilityThreshold=0.01
young=150e9
mn,mx=Vector3(0,0,0),Vector3(1,1,1)
cohesion=50e6
sigmaT=40e6
density=2650
poisson=0.25
confiningP=-1e6
O.materials.append(JCFpmMat(young=young,poisson=0.5,frictionAngle=0,density=0,label='walls',cohesion=0,tensileStrength=0))
O.materials.append(JCFpmMat(young=young, cohesion=cohesion, density=density,
frictionAngle=radians(finalFricDegree), tensileStrength=sigmaT,
poisson=poisson, label='spheres'))
walls=aabbWalls([mn,mx],thickness=0,material='walls')
wallIds=O.bodies.append(walls)
sp=pack.SpherePack()
sp.makeCloud(mn,mx,-1,0.3333,num_spheres,False, 0.95,seed=1)
O.bodies.append([sphere(center,rad,material='spheres') for center,rad in sp])
### DEFINING ENGINES ###
triax=TriaxialStressController(
thickness = 0,
stressMask = 7,
internalCompaction=True,
)
newton=NewtonIntegrator(damping=damp)
O.engines=[
ForceResetter(),
InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Box_Aabb()]),
InteractionLoop(
[Ig2_Sphere_Sphere_ScGeom(),Ig2_Box_Sphere_ScGeom()],
[Ip2_FrictMat_FrictMat_FrictPhys(),Ip2_JCFpmMat_JCFpmMat_JCFpmPhys(cohesiveTresholdIteration=0,
label='JCFpm')],
[Law2_ScGeom_JCFpmPhys_JointedCohesiveFrictionalPM(smoothJoint=False,neverErase=True,
recordCracks=True ),Law2_ScGeom_FrictPhys_CundallStrack()]
),
GlobalStiffnessTimeStepper(active=1,timeStepUpdateInterval=100,timestepSafetyCoefficient=0.6,defaultDt=0.5*utils.PWaveTimeStep()),
triax,
newton,
]
Gl1_Sphere.stripes=0
if nRead==0: yade.qt.Controller(), yade.qt.View()
### APPLYING CONFINING PRESSURE ###
triax.goal1=triax.goal2=triax.goal3=confiningP
while 1:
O.run(2000, True)
unb=unbalancedForce()
print ('unbalanced force:',unb,' mean stress: ',triax.meanStress)
if unb<stabilityThreshold and
abs((confiningP-triax.meanStress)/(-confiningP))<0.001:
break
### REACHING A SPECIFIED POROSITY PRECISELY ###
import sys
while triax.porosity>targetPorosity:
compFricDegree = 0.95*compFricDegree
setContactFriction(radians(compFricDegree))
print ("\r Friction: ",compFricDegree," porosity:",triax.porosity,)
sys.stdout.flush()
O.run(500,1)
export.textExt('densepacking.spheres','x_y_z_r')
for JCFpm cohesion , i run it directly in the below script that every new
contact should be cohesive
from yade import pack, export, ymport
import numpy as np
nRead=readParamsFromTable(
num_spheres=1000,# number of spheres
compFricDegree = 25,
key='_triax_base_'
unknownOk=True
)
from yade.params import table
num_spheres=table.num_spheres
key=table.key
targetPorosity = 0.46
compFricDegree = table.compFricDegree
finalFricDegree = 25
rate=-0.02 # loading rate (strain rate)
damp=0.2 # damping coefficient
stabilityThreshold=0.01
young=150e9
mn,mx=Vector3(0,0,0),Vector3(1,1,1)
confiningP=-10e6
cohesion=50e6
poisson=0.2
sigmaT=40e6
density=2650
intRadius=1.25
O.materials.append(JCFpmMat(young=young,poisson=0.5,frictionAngle=0,density=0,label='walls',cohesion=0,tensileStrength=0))
O.materials.append(JCFpmMat(young=young, cohesion=cohesion, density=density,
frictionAngle=radians(finalFricDegree), tensileStrength=sigmaT,
poisson=poisson, label='spheres'))
walls=aabbWalls([mn,mx],thickness=0,material='walls')
wallIds=O.bodies.append(walls)
pack = O.bodies.append(ymport.textExt('densepacking.spheres',
'x_y_z_r',color=(0,0.2,0.7), material='spheres'))
### DEFINING ENGINES ###
triax=TriaxialStressController(
thickness = 0,
stressMask = 7,
internalCompaction=True, # If true the confining pressure is generated
by growing particles
)
newton=NewtonIntegrator(damping=damp)
O.engines=[
ForceResetter(),
InsertionSortCollider([Bo1_Sphere_Aabb(aabbEnlargeFactor=intRadius),Bo1_Box_Aabb()]),
InteractionLoop(
[Ig2_Sphere_Sphere_ScGeom(interactionDetectionFactor=intRadius),Ig2_Box_Sphere_ScGeom()],
[Ip2_JCFpmMat_JCFpmMat_JCFpmPhys(cohesiveTresholdIteration=-1,
label='JCFPm')],
[Law2_ScGeom_JCFpmPhys_JointedCohesiveFrictionalPM(recordCracks=True,smoothJoint=False,neverErase=True,
recordMoments=True,Key=identifier+'/output.txt',label='interactionLaw'),Law2_ScGeom_FrictPhys_CundallStrack()]
),
GlobalStiffnessTimeStepper(active=1,timeStepUpdateInterval=100,timestepSafetyCoefficient=0.6,defaultDt=0.5*utils.PWaveTimeStep()),
triax,
newton,
]
Gl1_Sphere.stripes=0
if nRead==0: yade.qt.Controller(), yade.qt.View()
### APPLYING CONFINING PRESSURE ###
triax.goal1=triax.goal2=triax.goal3=confiningP
while 1:
O.run(2000, True)
unb=unbalancedForce()
print ('unbalanced force:',unb,' mean stress: ',triax.meanStress)
if unb<stabilityThreshold and
abs(confiningP-triax.meanStress)/(-confiningP)<0.001:
break
### REACHING A SPECIFIED POROSITY PRECISELY ###
import sys
while triax.porosity>targetPorosity:
compFricDegree = 0.95*compFricDegree
setContactFriction(radians(compFricDegree))
print ("\r Friction: ",compFricDegree," porosity:",triax.porosity,)
sys.stdout.flush()
O.run(500,1)
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