Hi, Vaclav!
I want to ask you to look at my script.
I have spent a lot of hours to define what is wrong there, but it seems I am
not be able to do it without your help.
It is a simple press-test. When it starts "at once", at the end of the
pressing specimen explodes. It is not normal for me.
But when I press "reload" button, It works as I await.
Could you not give me an advice, why is it happen? I think it is connected
with distanceFactor and my not clear understanding the issue.
Thank you for your help.
______________________________
[ENG] Best Regards
[GER] Mit freundlichen Grüßen
[RUS] С наилучшими пожеланиями
[UKR] З найкращими побажаннями
Anton Gladkyy
from yade import pack
from yade import utils
from math import *
import yade.plot
utils.readParamsFromTable(intRadiusInput=1.5,noTableOk=True)
#_______________________________________________________________________
PI = 3.14159265;
a = 50 #Size a, [mm] X
b = 50 #Size b, [mm] Y
h = 100 #Size h, [mm] Z
grainSize = 10 #Grain size, [mm]
distBetweenGrains = 0 #Distance between grains, [mm]
rho=2500 #Grain density, [kg/m^3]
poisson = 0.3 #Poisson coefficient
young = 37e9 #Young module
frictionAngle = 0.52 # Friction angle
stressCompressMax = 100e6
Brittleness = 0.07
intRadius = intRadiusInput
boxThick = 3 #Box thickness, [mm]
boxHeight = 10 #Box height, [mm]
boxCoef = 3 #In how many times box larger, than an example
pressCoef = 5 #In how many times press larger, than an example
#_______________________________________________________________________
a = 0.001*a
b = 0.001*b
h = 0.001*h
grainSize = 0.001*grainSize
radiusGrain = grainSize/2
distBetweenGrains = 0.001*distBetweenGrains
boxThick = 0.001*boxThick
boxHeight = 0.001*boxHeight
n2Mpa=PI*((a)**2)/4*1000000
predictedForce = n2Mpa/1000000*stressCompressMax
physClass = 'RpmMat'
#_______________________________________________________________________
kw={'density':rho,'young':young,'poisson':poisson,'frictionAngle':frictionAngle,'physParamsClass':physClass,'stressCompressMax':stressCompressMax,'Brittleness':Brittleness}
kw_facets={'frictionAngle':frictionAngle,'color':[0.98,0.984,0.576],'young':young,'dynamic':False,'physParamsClass':physClass}
kw_press={'frictionAngle':frictionAngle,'color':[0.757,0.278,0.976],'young':young,'dynamic':False,'physParamsClass':physClass, 'wire':False, 'exampleNumber':5}
ids_spheres=O.bodies.append(pack.regularHexa(pack.inCylinder((0,0,-boxHeight/2*boxCoef),(0,0,-boxHeight/2*boxCoef+h),a),radius=radiusGrain,gap=distBetweenGrains,color=(0.282,0.875,1),exampleNumber=1,initCohesive=True,**kw))
#Find the hihghest and the lowest sphere
maxHightSphere=O.bodies[ids_spheres[0]].phys.pos[2]
minHightSphere=O.bodies[ids_spheres[0]].phys.pos[2]
for i in ids_spheres:
if (O.bodies[i].phys.pos[2]>maxHightSphere):
maxHightSphere=O.bodies[i].phys.pos[2]
if (O.bodies[i].phys.pos[2]<minHightSphere):
minHightSphere=O.bodies[i].phys.pos[2]
minHight = minHightSphere-radiusGrain
maxHight = maxHightSphere+radiusGrain
realHight = maxHight-minHight
#box
O.bodies.append(utils.facetBox((0,0,(realHight/2+minHight)),(a*boxCoef,b*boxCoef,realHight/2),wallMask=31,exampleNumber=10,**kw_facets))
#press
id_press=O.bodies.append(utils.facet([[(1.5*a*pressCoef),0,maxHight],[(-a/2*pressCoef),(b*pressCoef),(maxHight)],[(-a/2*pressCoef),(-b*pressCoef),(maxHight)]],**kw_press))
#_______________________________________________________________________
try:
from yade import qt
qt.Controller()
except ImportError: pass
O.engines=[
BexResetter(),
BoundingVolumeMetaEngine([InteractingSphere2AABB(aabbEnlargeFactor=intRadius,label='is2aabb'),InteractingFacet2AABB(),MetaInteractingGeometry2AABB()]),
InsertionSortCollider(),
InteractionDispatchers(
[ef2_Sphere_Sphere_Dem3DofGeom(distanceFactor=intRadius,label='ss2d3dg'),ef2_Facet_Sphere_Dem3DofGeom()],
[Ip2_RpmMat_RpmMat_RpmPhys()],
[Law2_Dem3DofGeom_RockPMPhys_Rpm()]
),
GravityEngine(gravity=[0,0,-9.81]),
NewtonsDampedLaw(damping=0.15),
PressTestEngine(translationAxis=[0,0,1],velocity=-0.1,subscribedBodies=[id_press], numberIterationAfterDestruction=300, predictedForce=predictedForce),
PeriodicPythonRunner(iterPeriod=5,iterLim=10000,command='myAddPlotData()',label='plotDataCollector')
]
#______________________________________________________________________PLOT___________________________________________________
yade.plot.plots={'Eps':('Sigma')}
maxSigma=0
Eps_calcPrev=0
def myAddPlotData():
## store some numbers under some labels
global stressCompressMax
global h
global maxSigma
global startPressRecordHight
global Sigma_calcPrev
global Sigma_calc
global Eps_calc
global Eps_calcPrev
press=O.bodies[id_press]
Sigma_calc=((O.bex.f(id_press)[2])/n2Mpa)
if ((maxSigma==0)&(Sigma_calc>0)):
startPressRecordHight = press.phys.pos[2]
maxSigma=Sigma_calc
if (maxSigma>0):
Eps_calc=(startPressRecordHight-press.phys.pos[2])/h
if (Eps_calc>Eps_calcPrev):
yade.plot.addData(Eps=Eps_calc,Sigma=Sigma_calc)
Sigma_calcPrev = Sigma_calc
Eps_calcPrev = Eps_calc
if (Sigma_calc>maxSigma):
maxSigma=Sigma_calc
#______________________________________________________________________PLOT___________________________________________________
O.dt=utils.PWaveTimeStep()
#O.dt=0.000001
O.saveTmp('init')
from yade import qt
qt.Controller()
# to create initial contacts
O.step()
O.step()
# now reset the interaction radius and go ahead
ss2d3dg['distanceFactor']=1.
is2aabb['aabbEnlargeFactor']=1.
# This is for multi-tasks
O.run()
qt.View()
O.wait()
file('multi.out','a').write('%s %g %g %g %g %g\n'%(O.tags['description'],intRadiusInput, maxSigma, O.iter, O.realtime, (O.iter/O.realtime)))
yade.plot.saveGnuplot(O.tags['description'])
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