def setUp(self):
woo.master.reset()
woo.master.scene = S = Scene(fields=[DemField()])
r1, r2, p0, p1 = 1, .5, Vector3.Zero, Vector3(0, 0, 3)
S.dem.par.addClumped([utils.sphere(p0, r1), utils.sphere(p1, r2)])
for n in (S.dem.par[0].shape.nodes[0], S.dem.par[1].shape.nodes[0]):
S.dem.nodesAppend(n)
self.bC, self.b1, self.b2 = S.dem.nodes
def setUp(self): woo.master.reset() woo.master.scene=S=Scene(fields=[DemField()]) r1,r2,p0,p1=1,.5,Vector3.Zero,Vector3(0,0,3) S.dem.par.addClumped([ utils.sphere(p0,r1), utils.sphere(p1,r2) ]) for n in (S.dem.par[0].shape.nodes[0],S.dem.par[1].shape.nodes[0]): S.dem.nodesAppend(n); self.bC,self.b1,self.b2=S.dem.nodes
def setUp(self):
woo.master.reset()
woo.master.scene.fields=[DemField()]
S=woo.master.scene
self.count=100
S.dem.par.add([utils.sphere([random.random(),random.random(),random.random()],random.random()) for i in range(0,self.count)])
random.seed()
def randomPeriPack(radius,initSize,rRelFuzz=0.0,memoizeDb=None):
"""Generate periodic dense packing.
A cell of initSize is stuffed with as many spheres as possible, then we run periodic compression with PeriIsoCompressor, just like with randomDensePack.
:param radius: mean sphere radius
:param rRelFuzz: relative fuzz of sphere radius (equal distribution); see the same param for randomDensePack.
:param initSize: initial size of the periodic cell.
:return: SpherePack object, which also contains periodicity information.
"""
from math import pi
from woo import core, dem
sp=_getMemoizedPacking(memoizeDb,radius,rRelFuzz,initSize[0],initSize[1],initSize[2],fullDim=Vector3(0,0,0),wantPeri=True,fillPeriodic=False,spheresInCell=-1,memoDbg=True)
if sp: return sp
#oldScene=O.scene
S=core.Scene(fields=[dem.DemField()])
sp=SpherePack()
S.periodic=True
S.cell.setBox(initSize)
sp.makeCloud(Vector3().Zero,S.cell.size0,radius,rRelFuzz,-1,True)
from woo import log
log.setLevel('PeriIsoCompressor',log.DEBUG)
S.engines=[dem.ForceResetter(),dem.InsertionSortCollider([dem.Bo1_Sphere_Aabb()],verletDist=.05*radius),dem.ContactLoop([dem.Cg2_Sphere_Sphere_L6Geom()],[dem.Cp2_FrictMat_FrictPhys()],[dem.Law2_L6Geom_FrictPhys_IdealElPl()],applyForces=True),dem.PeriIsoCompressor(charLen=2*radius,stresses=[-100e9,-1e8],maxUnbalanced=1e-2,doneHook='print "done"; S.stop();',globalUpdateInt=20,keepProportions=True),dem.Leapfrog(damping=.8)]
mat=dem.FrictMat(young=30e9,tanPhi=.1,ktDivKn=.3,density=1e3)
for s in sp: S.dem.par.add(utils.sphere(s[0],s[1],mat=mat))
S.dt=utils.pWaveDt(S)
#O.timingEnabled=True
S.run(); S.wait()
ret=SpherePack()
ret.fromDem(S,S.dem)
_memoizePacking(memoizeDb,ret,radius,rRelFuzz,wantPeri=True,fullDim=Vector3(0,0,0)) # fullDim unused
return ret
def setUp(self): woo.master.scene=S=Scene(fields=[DemField()]) S.periodic=True; S.cell.setBox(2.5,2.5,3) self.cellDist=Vector3i(0,0,10) # how many cells away we go self.relDist=Vector3(0,.999999999999999999,0) # rel position of the 2nd ball within the cell self.initVel=Vector3(0,0,5) S.dem.par.add(utils.sphere((1,1,1),.5)) self.initPos=Vector3([S.dem.par[0].pos[i]+self.relDist[i]+self.cellDist[i]*S.cell.hSize0.col(i).norm() for i in (0,1,2)]) S.dem.par.add(utils.sphere(self.initPos,.5)) S.dem.par[1].vel=self.initVel S.engines=[Leapfrog(reset=True)] S.cell.nextGradV=Matrix3(0,0,0, 0,0,0, 0,0,-1) S.cell.homoDeform=Cell.HomoVel2 S.dem.collectNodes() # avoid msg from Leapfrog S.dt=0 # do not change positions with dt=0 in NewtonIntegrator, but still update velocities from velGrad
def setUp(self):
woo.master.reset()
woo.master.scene.fields=[DemField()]
S=woo.master.scene
self.count=100
S.dem.par.add([utils.sphere([random.random(),random.random(),random.random()],random.random()) for i in range(0,self.count)])
random.seed()
def regularOrtho(predicate,radius,gap,**kw):
"""Return set of spheres in regular orthogonal grid, clipped inside solid given by predicate.
Created spheres will have given radius and will be separated by gap space."""
ret=[]
mn,mx=predicate.aabb()
if(max([mx[i]-mn[i] for i in 0,1,2])==float('inf')): raise ValueError("Aabb of the predicate must not be infinite (didn't you use union | instead of intersection & for unbounded predicate such as notInNotch?");
xx,yy,zz=[arange(mn[i]+radius,mx[i]-radius,2*radius+gap) for i in 0,1,2]
for xyz in itertools.product(xx,yy,zz):
if predicate(xyz,radius): ret+=[utils.sphere(xyz,radius=radius,**kw)]
return ret
def testNoCollide(self):
"Clump: particles inside one clump don't collide with each other"
# use a new scene, with a different clump in this test
S=Scene(fields=[DemField()])
S.dem.par.addClumped([utils.sphere(c,r) for c,r in [((1,0,0),1),((0,1,0),1),((0,0,1),1)]])
S.engines=[InsertionSortCollider([Bo1_Sphere_Aabb()])]
S.one()
for i,j in [(0,1),(1,2),(0,2)]:
self.assertTrue(not woo.dem.Collider.mayCollide(S.dem,S.dem.par[i],S.dem.par[j]))
self.assertTrue(len(S.dem.con)==0)
def testNoCollide(self): "Clump: particles inside one clump don't collide with each other" # use a new scene, with a different clump in this test S=Scene(fields=[DemField()]) S.dem.par.addClumped([utils.sphere(c,r) for c,r in [((1,0,0),1),((0,1,0),1),((0,0,1),1)]]) S.engines=[InsertionSortCollider([Bo1_Sphere_Aabb()])] S.one() for i,j in [(0,1),(1,2),(0,2)]: self.assert_(not woo.dem.Collider.mayCollide(S.dem,S.dem.par[i],S.dem.par[j])) self.assert_(len(S.dem.con)==0)
def fill_cylinder_with_spheres(sphereRadius,cylinderRadius,cylinderHeight,cylinderOrigin,cylinderSlope):
spheresCount=0
for h in range(0,cylinderHeight/sphereRadius/2):
for r in range(1,cylinderRadius/sphereRadius/2):
dfi = asin(0.5/r)*2
for a in range(0,6.28/dfi):
x = cylinderOrigin[0]+2*r*sphereRadius*cos(dfi*a)
y = cylinderOrigin[1]+2*r*sphereRadius*sin(dfi*a)
z = cylinderOrigin[2]+h*2*sphereRadius
o.bodies.append(utils.sphere([x,y*cos(cylinderSlope)+z*sin(cylinderSlope),z*cos(cylinderSlope)-y*sin(cylinderSlope)],sphereRadius))
spheresCount+=1
return spheresCount
def setUp(self):
woo.master.scene=S=Scene(fields=[DemField()])
S.periodic=True;
S.cell.setBox(2.5,2.5,3)
self.cellDist=Vector3i(0,0,10) # how many cells away we go
self.relDist=Vector3(0,.999999999999999999,0) # rel position of the 2nd ball within the cell
self.initVel=Vector3(0,0,5)
S.dem.par.add(Sphere.make((1,1,1),.5))
self.initPos=Vector3([S.dem.par[0].pos[i]+self.relDist[i]+self.cellDist[i]*S.cell.hSize0.col(i).norm() for i in (0,1,2)])
S.dem.par.add(utils.sphere(self.initPos,.5))
S.dem.par[1].vel=self.initVel
S.engines=[Leapfrog(reset=True)]
S.cell.nextGradV=Matrix3(0,0,0, 0,0,0, 0,0,-1)
S.cell.homoDeform='vel2'
S.dt=0 # do not change positions with dt=0 in NewtonIntegrator, but still update velocities from velGrad
def fill_cylinder_with_spheres(sphereRadius, cylinderRadius, cylinderHeight,
cylinderOrigin, cylinderSlope):
spheresCount = 0
for h in range(0, cylinderHeight / sphereRadius / 2):
for r in range(1, cylinderRadius / sphereRadius / 2):
dfi = asin(0.5 / r) * 2
for a in range(0, 6.28 / dfi):
x = cylinderOrigin[0] + 2 * r * sphereRadius * cos(dfi * a)
y = cylinderOrigin[1] + 2 * r * sphereRadius * sin(dfi * a)
z = cylinderOrigin[2] + h * 2 * sphereRadius
o.bodies.append(
utils.sphere([
x, y * cos(cylinderSlope) + z * sin(cylinderSlope),
z * cos(cylinderSlope) - y * sin(cylinderSlope)
], sphereRadius))
spheresCount += 1
return spheresCount
def regularHexa(predicate,radius,gap,**kw): """Return set of spheres in regular hexagonal grid, clipped inside solid given by predicate. Created spheres will have given radius and will be separated by gap space.""" ret=[] a=2*radius+gap # thanks to Nasibeh Moradi for finding bug here: # http://www.mail-archive.com/[email protected]/msg01424.html hy,hz=a*sqrt(3)/2.,a*sqrt(6)/3. mn,mx=predicate.aabb() dim=mx-mn if(max(dim)==float('inf')): raise ValueError("Aabb of the predicate must not be infinite (didn't you use union | instead of intersection & for unbounded predicate such as notInNotch?"); ii,jj,kk=[range(0,int(dim[0]/a)+1),range(0,int(dim[1]/hy)+1),range(0,int(dim[2]/hz)+1)] for i,j,k in itertools.product(ii,jj,kk): x,y,z=mn[0]+radius+i*a,mn[1]+radius+j*hy,mn[2]+radius+k*hz if j%2==0: x+= a/2. if k%2==0 else -a/2. if k%2!=0: x+=a/2.; y+=hy/2. if predicate((x,y,z),radius): ret+=[utils.sphere((x,y,z),radius=radius,**kw)] return ret
from woo.core import *
from woo.dem import *
import woo.gl
from woo import utils
S = woo.master.scene = Scene(fields=[DemField(gravity=(0, 0, -10))])
S.dem.par.add(
[utils.wall((0, 0, 0), axis=2, sense=1),
utils.sphere((0, 0, 1), .2)])
S.dem.par[1].vel = (0, 1, 0)
S.dt = .7 * utils.pWaveDt()
S.engines = utils.defaultEngines() + [
woo.dem.Tracer(num=512, compress=2, stepPeriod=10, compSkip=1)
]
S.saveTmp()
import woo.qt
woo.qt.View()
S.run(2000)
#### material definition
netMat = O.materials.append(
WireMat(young=young,
poisson=poisson,
density=density,
isDoubleTwist=False,
diameter=d,
strainStressValues=strainStressValues,
lambdaEps=0.4,
lambdak=0.21))
#### create boddies, default: dynamic=True
O.bodies.append(
utils.sphere([0, 0, 0],
radius,
wire=False,
color=[1, 0, 0],
highlight=False,
material=netMat))
O.bodies.append(
utils.sphere([0, a, 0],
radius,
wire=False,
color=[0, 1, 0],
highlight=False,
material=netMat))
FixedSphere = O.bodies[0]
MovingSphere = O.bodies[1]
FixedSphere.dynamic = False
MovingSphere.dynamic = False
# default spheres material dfltSpheresMat=O.materials.append(ViscElMat(density=density,frictionAngle=frictionAngle)) O.dt=.01*tc # time step Rs=0.1 # particle radius # Create geometry plnSurf = pack.sweptPolylines2gtsSurface([[Vector3(-.5,0,0),Vector3(.5,0,0),Vector3(.5, 0, -.5),Vector3(-.5, 0, -.5)]],capStart=True,capEnd=True) plnIds=O.bodies.append(pack.gtsSurface2Facets(plnSurf.faces(),material=facetMat,color=(0,1,0))) plnSurf1 = pack.sweptPolylines2gtsSurface([[Vector3(-.5,-.5,-.5),Vector3(.5,-.5,-.5),Vector3(.5, 1.5, -.5),Vector3(-.5, 1.5, -.5)]],capStart=True,capEnd=True) plnIds1=O.bodies.append(pack.gtsSurface2Facets(plnSurf1.faces(),material=facetMat,color=(0,1,0))) # Create clumps clpId,sphId=O.bodies.appendClumped([utils.sphere(Vector3(0,Rs*2*i,Rs*2),Rs,material=dfltSpheresMat) for i in xrange(4)]) for id in sphId: s=O.bodies[id] p=utils.getViscoelasticFromSpheresInteraction(s.state['mass'],tc,en,es) s.mat['kn'],s.mat['cn'],s.mat['ks'],s.mat['cs']=p['kn'],p['cn'],p['ks'],p['cs'] # Create engines O.engines=[ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Facet_Aabb()]), InteractionLoop( [Ig2_Sphere_Sphere_ScGeom(), Ig2_Facet_Sphere_ScGeom()], [Ip2_ViscElMat_ViscElMat_ViscElPhys()], [Law2_ScGeom_ViscElPhys_Basic()], ), GravityEngine(gravity=[0,0,-9.81]),
plnSurf1 = pack.sweptPolylines2gtsSurface([[
Vector3(-.5, -.5, -.5),
Vector3(.5, -.5, -.5),
Vector3(.5, 1.5, -.5),
Vector3(-.5, 1.5, -.5)
]],
capStart=True,
capEnd=True)
plnIds1 = O.bodies.append(
pack.gtsSurface2Facets(plnSurf1.faces(),
material=facetMat,
color=(0, 1, 0)))
# Create clumps
clpId, sphId = O.bodies.appendClumped([
utils.sphere(Vector3(0, Rs * 2 * i, Rs * 2), Rs, material=dfltSpheresMat)
for i in range(4)
])
for id in sphId:
s = O.bodies[id]
p = utils.getViscoelasticFromSpheresInteraction(s.state['mass'], tc, en,
es)
s.mat['kn'], s.mat['cn'], s.mat['ks'], s.mat['cs'] = p['kn'], p['cn'], p[
'ks'], p['cs']
# Create engines
O.engines = [
ForceResetter(),
InsertionSortCollider([Bo1_Sphere_Aabb(),
Bo1_Facet_Aabb()]),
InteractionLoop(
n = 5.
s = 1. / n
for i in range(0, n):
for j in range(0, n):
O.bodies.append([
utils.facet([(i * s, j * s, 0.1), (i * s, (j + 1) * s, 0.1),
((i + 1) * s, (j + 1) * s, 0.1)],
material=facetMat),
utils.facet([(i * s, j * s, 0.1), ((i + 1) * s, j * s, 0.1),
((i + 1) * s, (j + 1) * s, 0.1)],
material=facetMat),
])
# Spheres
sphId = O.bodies.append([
utils.sphere((0.5, 0.5, 0.2), 0.1, material=sphereMat),
])
O.bodies[sphId[-1]].state.vel = (0.5, 0, 0)
## Engines
O.engines = [
ForceResetter(),
InsertionSortCollider([Bo1_Sphere_Aabb(),
Bo1_Facet_Aabb()]),
InteractionLoop(
[Ig2_Facet_Sphere_ScGeom()],
[Ip2_ViscElMat_ViscElMat_ViscElPhys()],
[Law2_ScGeom_ViscElPhys_Basic()],
),
GravityEngine(gravity=[0, 0, -9.81]),
NewtonIntegrator(damping=0),
# define piecewise lineare stress-strain curve strainStressValues=[(0.0019230769,2.5e8),(0.0192,3.2195e8),(0.05,3.8292e8),(0.15,5.1219e8),(0.25,5.5854e8),(0.3,5.6585e8),(0.35,5.6585e8)] # elastic material properties particleVolume = 4./3.*pow(radius,3)*pi particleMass = 3.9/1000. density = particleMass/particleVolume young = strainStressValues[0][1] / strainStressValues[0][0] poisson = 0.3 #### material definition netMat = O.materials.append(WireMat(young=young,poisson=poisson,density=density,isDoubleTwist=False,diameter=d,strainStressValues=strainStressValues,lambdaEps=0.4,lambdak=0.21)) #### create boddies, default: dynamic=True O.bodies.append( utils.sphere([0,0,0], radius, wire=False, color=[1,0,0], highlight=False, material=netMat) ) O.bodies.append( utils.sphere([0,a,0], radius, wire=False, color=[0,1,0], highlight=False, material=netMat) ) FixedSphere=O.bodies[0] MovingSphere=O.bodies[1] FixedSphere.dynamic=True MovingSphere.dynamic=True #### initialize values for UniaxialStrainer bb = utils.uniaxialTestFeatures(axis=1) negIds,posIds,axis,crossSectionArea=bb['negIds'],bb['posIds'],bb['axis'],bb['area'] strainRateTension = 1./a setSpeeds = True
pack.gtsSurface2Facets(pln.faces(), material=facetMat, color=(0, 1, 0)))
fct = Plane((-.25, -.25, .5), (.25, -.25, .5), (.25, .25, .5), (-.25, .25, .5))
fctIds = O.bodies.append(
pack.gtsSurface2Facets(fct.faces(),
material=facetMat,
color=(1, 0, 0),
noBound=True))
# Create spheres
sp = pack.SpherePack()
sp.makeCloud(Vector3(-.5, -.5, 0), Vector3(.5, .5, .2), Rs, Rf, int(nSpheres),
False)
spheres = O.bodies.append([
utils.sphere(s[0],
s[1],
color=(0.929, 0.412, 0.412),
material=dfltSpheresMat) for s in sp
])
for id in spheres:
s = O.bodies[id]
p = utils.getViscoelasticFromSpheresInteraction(s.state['mass'], tc, en,
es)
s.mat['kn'], s.mat['cn'], s.mat['ks'], s.mat['cs'] = p['kn'], p['cn'], p[
'ks'], p['cs']
# Create engines
O.engines = [
ForceResetter(),
InsertionSortCollider([Bo1_Sphere_Aabb(),
Bo1_Facet_Aabb()]),
InteractionLoop(
pickle.dump(dd,open(packingFile,'w'))
#
# load the packing (again);
#
import pickle as pickle
concreteId=O.materials.append(CpmMat(young=young,frictionAngle=frictionAngle,poisson=poisson,density=4800,sigmaT=sigmaT,relDuctility=relDuctility,epsCrackOnset=epsCrackOnset,G_over_E=G_over_E,isoPrestress=isoPrestress))
sphDict=pickle.load(open(packingFile))
from woo import pack
sp=pack.SpherePack()
sp.fromList(sphDict['spheres'])
sp.cellSize=sphDict['cell']
import numpy
avgRadius=numpy.average([r for c,r in sp])
O.bodies.append([utils.sphere(c,r,color=utils.randomColor()) for c,r in sp])
O.periodic=True
O.cell.refSize=sp.cellSize
axis=2
ax1=(axis+1)%3
ax2=(axis+2)%3
O.dt=dtSafety*utils.PWaveTimeStep()
import woo.log
#woo.log.setLevel('PeriTriaxController',woo.log.TRACE)
import woo.plot as yp
O.engines=[
ForceResetter(),
InsertionSortCollider([Bo1_Sphere_Aabb(aabbEnlargeFactor=intRadius,label='is2aabb'),],sweepLength=.05*avgRadius,nBins=5,binCoeff=5),
InteractionLoop(
from woo.core import* from woo.dem import * import woo.gl from woo import utils S=woo.master.scene=Scene(fields=[DemField(gravity=(0,0,-10))]) S.dem.par.add([ utils.wall((0,0,0),axis=2,sense=1), utils.sphere((0,0,1),.2) ]) S.dem.par[1].vel=(0,1,0) S.dt=.7*utils.pWaveDt() S.engines=utils.defaultEngines()+[woo.dem.Tracer(num=512,compress=2,stepPeriod=10,compSkip=1)] S.saveTmp() import woo.qt woo.qt.View() S.run(2000)
from woo.core import *
from numpy import linspace
from woo import pack,qt,utils
from minieigen import *
from math import *
S=woo.master.scene=Scene(fields=[DemField(gravity=(0,0,-9.81))])
thetas=linspace(0,2*pi,num=16,endpoint=True)
meridians=pack.revolutionSurfaceMeridians([[Vector2(3+rad*sin(th),10*rad+rad*cos(th)) for th in thetas] for rad in linspace(1,2,num=10)],angles=linspace(0,pi,num=10))
surf=pack.sweptPolylines2gtsSurface(meridians+[[Vector3(5*sin(-th),-10+5*cos(-th),30) for th in thetas]])
S.dem.par.add(pack.gtsSurface2Facets(surf))
S.dem.par.add(InfCylinder.make((0,0,0),axis=0,radius=2,glAB=(-10,10)))
# edgy helix from contiguous rods
nPrev=None
for i in range(25):
nNext=Node(pos=(3+3*sin(i),3*cos(i),3+.3*i))
if nPrev: S.dem.par.add(Rod.make(vertices=[nPrev,nNext],radius=.5,wire=False,fixed=True))
nPrev=nNext
sp=pack.SpherePack()
sp.makeCloud(Vector3(-1,-9,30),Vector3(1,-13,32),.2,rRelFuzz=.3)
S.dem.par.add([utils.sphere(c,r) for c,r in sp])
S.engines=DemField.minimalEngines(damping=.2)+[VtkExport(stepPeriod=100,what=VtkExport.spheres|VtkExport.mesh,out='/tmp/p1-'),PyRunner(initRun=False,stepPeriod=0,virtPeriod=13,nDo=1,command='import woo.paraviewscript; woo.paraviewscript.fromEngines(S,launch=True); S.stop()')]
qt.Controller()
qt.View()
S.saveTmp()
sp = pack.SpherePack()
#cohesive spheres crash because sphere-cylnder functor geneteragets ScGeom3D
#O.materials.append(CohFrictMat(young=1.0e5,poisson=0.03,density=2.60e2,frictionAngle=frictionAngle,label='spheremat'))
if os.path.exists("cloud4cylinders" + ` Ns `):
print "loading spheres from file"
sp.load("cloud4cylinders" + ` Ns `)
else:
print "generating spheres"
Ns = sp.makeCloud(Vector3(-0.3, 0.2, -1.0), Vector3(+0.3, +0.5, +1.0), -1,
.2, Ns, False, 0.8)
sp.save("cloud4cylinders" + ` Ns `)
O.bodies.append(
[utils.sphere(center, rad, material='spheremat') for center, rad in sp])
walls = utils.aabbWalls((Vector3(-0.3, -0.15, -1), Vector3(+0.3, +1.0, +1)),
thickness=.1,
material='walllmat')
wallIds = O.bodies.append(walls)
O.initializers = [
BoundDispatcher(
[Bo1_Sphere_Aabb(),
Bo1_ChainedCylinder_Aabb(),
Bo1_Box_Aabb()])
]
O.engines = [
ForceResetter(),
InsertionSortCollider(
right = pack.sweptPolylines2gtsSurface([[Vector3(x1b,y0b,zb),Vector3(x1t,y0t,zt),Vector3(x1t,y1t,zt),Vector3(x1b,y1b,zb)]],capStart=True,capEnd=True)
rgtIds=O.bodies.append(pack.gtsSurface2Facets(right.faces(),material=facetMat,color=(0,1,0)))
near = pack.sweptPolylines2gtsSurface([[Vector3(x0b,y0b,zb),Vector3(x0t,y0t,zt),Vector3(x1t,y0t,zt),Vector3(x1b,y0b,zb)]],capStart=True,capEnd=True)
nearIds=O.bodies.append(pack.gtsSurface2Facets(near.faces(),material=facetMat,color=(0,1,0)))
far = pack.sweptPolylines2gtsSurface([[Vector3(x0b,y1b,zb),Vector3(x0t,y1t,zt),Vector3(x1t,y1t,zt),Vector3(x1b,y1b,zb)]],capStart=True,capEnd=True)
farIds=O.bodies.append(pack.gtsSurface2Facets(far.faces(),material=facetMat,color=(0,1,0)))
table = pack.sweptPolylines2gtsSurface([[Vector3(x0l,y0l,zl),Vector3(x0l,y1l,zl),Vector3(x1l,y1l,zl),Vector3(x1l,y0l,zl)]],capStart=True,capEnd=True)
tblIds=O.bodies.append(pack.gtsSurface2Facets(table.faces(),material=facetMat,color=(0,1,0)))
# Create clumps...
clumpColor=(0.0, 0.5, 0.5)
for k,l in itertools.product(arange(0,10),arange(0,10)):
clpId,sphId=O.bodies.appendClumped([utils.sphere(Vector3(x0t+Rs*(k*4+2),y0t+Rs*(l*4+2),i*Rs*2+zt),Rs,color=clumpColor,material=dfltSpheresMat) for i in range(4)])
# ... and spheres
#spheresColor=(0.4, 0.4, 0.4)
#for k,l in itertools.product(arange(0,9),arange(0,9)):
#sphAloneId=O.bodies.append( [utils.sphere( Vector3(x0t+Rs*(k*4+4),y0t+Rs*(l*4+4),i*Rs*2.3+zt),Rs,color=spheresColor,material=dfltSpheresMat) for i in xrange(4) ] )
# Create engines
O.engines=[
ForceResetter(),
InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Facet_Aabb()]),
InteractionLoop(
[Ig2_Sphere_Sphere_ScGeom(), Ig2_Facet_Sphere_ScGeom()],
[Ip2_ViscElMat_ViscElMat_ViscElPhys()],
[Law2_ScGeom_ViscElPhys_Basic()],
),
from woo import pack, qt, utils
from minieigen import *
from math import *
S = woo.master.scene = Scene(fields=[DemField(gravity=(0, 0, -9.81))])
thetas = linspace(0, 2 * pi, num=16, endpoint=True)
meridians = pack.revolutionSurfaceMeridians(
[[Vector2(3 + rad * sin(th), 10 * rad + rad * cos(th)) for th in thetas]
for rad in linspace(1, 2, num=10)],
angles=linspace(0, pi, num=10))
surf = pack.sweptPolylines2gtsSurface(
meridians +
[[Vector3(5 * sin(-th), -10 + 5 * cos(-th), 30) for th in thetas]])
S.dem.par.add(pack.gtsSurface2Facets(surf))
sp = pack.SpherePack()
sp.makeCloud(Vector3(-1, -9, 30), Vector3(1, -13, 32), .2, rRelFuzz=.3)
S.dem.par.add([utils.sphere(c, r) for c, r in sp])
S.engines = DemField.minimalEngines(damping=.2) + [
VtkExport(stepPeriod=100,
what=VtkExport.spheres | VtkExport.mesh,
out='/tmp/p1-')
]
qt.Controller()
qt.View()
S.stopAtTime = 13.
S.saveTmp()
from woo import utils
from woo.core import *
from woo.dem import *
from woo import plot
from woo import *
import woo.log
woo.log.setLevel('LawTester',woo.log.INFO)
m=utils.defaultMaterial()
S=woo.master.scene=Scene(fields=[DemField()])
S.dem.par.add([
utils.sphere((0,0,0),.5,fixed=False,wire=True,mat=m),
utils.sphere((0,1.01,0),.5,fixed=False,wire=True,mat=m)
])
S.dem.collectNodes()
S.engines=utils.defaultEngines(damping=.01)+[
LawTester(ids=(0,1),abWeight=.3,smooth=1e-4,stages=[
LawTesterStage(values=(-1,0,0,0,0,0),whats='v.....',until='bool(C)',done='print "Stage finished, at step",stage.step,", contact is",C'),
LawTesterStage(values=(-.01,0,0,0,0,0),whats='v.....',until='C and C.geom.uN<-1e-2',done='print "Compressed to",C.geom.uN'),
LawTesterStage(values=(.01,0,0,0,0,0),whats='v.....',until=('not C'),done='print "Contact broken",S.step;'),
LawTesterStage(values=(-1e5,0,0,0,0,0),whats='fvv...',until=('C and tester.fErrRel[0]<1e-1'),done='print "Force-loaded contact stabilized";'),
LawTesterStage(values=(-1e5,-.01,0,0,0,0),whats='fvvvvv',until=('"plast" in E and E["plast"]>0'),done='print "Plastic sliding reached";'),
LawTesterStage(values=(0,-.01,0,0,0,0),whats=('vvvvvv'),until='stage.step>5000',done='print "5000 steps sliding done";'),
LawTesterStage(values=(0,0,0,0,0,0),whats='vvvvvv',until='stage.step>100',done='E["plast"]=0.'),
LawTesterStage(values=(0,0,-.01,0,0,0),whats='vvvvvv',until=('E["plast"]>1000'),done='print "sliding in the z-direction reached"'),
LawTesterStage(values=(0,0,0,.1,0,0),whats='vvvvvv',until='stage.step>10000',done='print "Twist done"'),
LawTesterStage(values=(0,0,0,0,.1,0),whats='vvvvvv',until='stage.step>10000',done='print "Bending done"'),
LawTesterStage(values=(0,0,0,0,-.1,0),whats='vvvvvv',until='stage.step>10000',done='print "Bending back"'),
],
done='tester.dead=True; S.stop(); print "Everything done, making myself dead and pausing."',
label='tester'
),
x = (i * 2 - nbSpheres[0]
) * sphereRadius * 1.1 + sphereRadius * random.uniform(
-0.1, 0.1)
y = -j * sphereRadius * 2.2 - 0.01
z = (k * 2 - nbSpheres[2]
) * sphereRadius * 1.1 + sphereRadius * random.uniform(
-0.1, 0.1)
r = random.uniform(sphereRadius, sphereRadius * 0.9)
dynamic = True
color = [0.51, 0.52, 0.4]
if (i == 0 or i == nbSpheres[0] - 1 or j == nbSpheres[1] - 1
or k == 0 or k == nbSpheres[2] - 1):
dynamic = False
color = [0.21, 0.22, 0.1]
O.bodies.append(
utils.sphere([x, y, z], r, color=color, dynamic=dynamic))
print("done\n")
## Estimate time step
#O.dt=utils.PWaveTimeStep()
O.dt = 0.0001
## Engines
O.engines = [
## Resets forces and momenta the act on bodies
ForceResetter(),
## Using bounding boxes find possible body collisions.
InsertionSortCollider([
Bo1_Sphere_Aabb(),
Bo1_Facet_Aabb(),
from woo import utils, plot
import random, woo.log
random.seed()
#woo.log.setLevel('LawTester',woo.log.TRACE)
# sphere's radii
r1, r2 = .1, .2
# place sphere 1 at the origin
pt1 = Vector3(0, 0, 0)
# random orientation of the interaction
normal = Vector3(random.random() - .5,
random.random() - .5,
random.random() - .5)
normal = Vector3.UnitX
O.bodies.append([
utils.sphere(pt1, r1, wire=True, color=(.7, .7, .7)),
utils.sphere(pt1 + .999999 * (r1 + r2) * normal.normalized(),
r2,
wire=True,
color=(0, 0, 0))
])
O.engines = [
ForceResetter(),
PyRunner(iterPeriod=1, command='import time; time.sleep(.05)'),
InsertionSortCollider([Bo1_Sphere_Aabb()]),
InteractionLoop(
#[Ig2_Sphere_Sphere_ScGeom()], [Ip2_FrictMat_FrictMat_FrictPhys()], [Law2_ScGeom_FrictPhys_CundallStrack()] # ScGeom
#[Ig2_Sphere_Sphere_L3Geom(approxMask=63)],[Ip2_FrictMat_FrictMat_FrictPhys()],[Law2_L3Geom_FrictPhys_ElPerfPl(noBreak=True,noSlip=False)] # L3Geom
[Ig2_Sphere_Sphere_L6Geom(approxMask=63)],
[Ip2_FrictMat_FrictMat_FrictPhys()],
Vector3(x0l, y1l, zl),
Vector3(x1l, y1l, zl),
Vector3(x1l, y0l, zl)
]],
capStart=True,
capEnd=True)
tblIds = O.bodies.append(
pack.gtsSurface2Facets(table.faces(), material=facetMat, color=(0, 1, 0)))
# Create clumps...
clumpColor = (0.0, 0.5, 0.5)
for k, l in itertools.product(arange(0, 10), arange(0, 10)):
clpId, sphId = O.bodies.appendClumped([
utils.sphere(Vector3(x0t + Rs * (k * 4 + 2), y0t + Rs * (l * 4 + 2),
i * Rs * 2 + zt),
Rs,
color=clumpColor,
material=dfltSpheresMat) for i in range(4)
])
# ... and spheres
#spheresColor=(0.4, 0.4, 0.4)
#for k,l in itertools.product(arange(0,9),arange(0,9)):
#sphAloneId=O.bodies.append( [utils.sphere( Vector3(x0t+Rs*(k*4+4),y0t+Rs*(l*4+4),i*Rs*2.3+zt),Rs,color=spheresColor,material=dfltSpheresMat) for i in xrange(4) ] )
# Create engines
O.engines = [
ForceResetter(),
InsertionSortCollider([Bo1_Sphere_Aabb(),
Bo1_Facet_Aabb()]),
InteractionLoop(
left = pack.sweptPolylines2gtsSurface([[Vector3(-1,-1,-1),Vector3(1,-1,-1),Vector3(1, -1, 1),Vector3(-1, -1, 1)]],capStart=True,capEnd=True)
lftIds=O.bodies.append(pack.gtsSurface2Facets(left.faces(),material=facetMat,color=(0,1,0)))
right = pack.sweptPolylines2gtsSurface([[Vector3(-1,1,-1),Vector3(1,1,-1),Vector3(1, 1, 1),Vector3(-1, 1, 1)]],capStart=True,capEnd=True)
rgtIds=O.bodies.append(pack.gtsSurface2Facets(right.faces(),material=facetMat,color=(0,1,0)))
near = pack.sweptPolylines2gtsSurface([[Vector3(1,-1,-1),Vector3(1,1,-1),Vector3(1, 1, 1),Vector3(1, -1, 1)]],capStart=True,capEnd=True)
nearIds=O.bodies.append(pack.gtsSurface2Facets(near.faces(),material=facetMat,color=(0,1,0)))
far = pack.sweptPolylines2gtsSurface([[Vector3(-1,-1,-1),Vector3(-1,1,-1),Vector3(-1, 1, 1),Vector3(-1, -1, 1)]],capStart=True,capEnd=True)
farIds=O.bodies.append(pack.gtsSurface2Facets(far.faces(),material=facetMat,color=(0,1,0)))
# Create clumps...
for j in range(10):
clpId,sphId=O.bodies.appendClumped([utils.sphere(Vector3(0,Rs*2*i,(j+1)*Rs*2),Rs,material=dfltSpheresMat) for i in range(4)])
for id in sphId:
s=O.bodies[id]
p=utils.getViscoelasticFromSpheresInteraction(s.state.mass,tc,en,es)
s.mat.kn,s.mat.cn,s.mat.ks,s.mat.cs=p['kn'],p['cn'],p['ks'],p['cs']
# ... and spheres
sphAloneId=O.bodies.append( [utils.sphere( Vector3(0.5,Rs*2*i,(j+1)*Rs*2), Rs, material=dfltSpheresMat) for i in range(4) ] )
for id in sphAloneId:
s=O.bodies[id]
p=utils.getViscoelasticFromSpheresInteraction(s.state.mass,tc,en,es)
s.mat.kn,s.mat.cn,s.mat.ks,s.mat.cs=p['kn'],p['cn'],p['ks'],p['cs']
# Create engines
O.engines=[
ForceResetter(),
def SpherePack_toSimulation(self,scene,rot=Matrix3.Identity,**kw): ur"""Append spheres directly to the simulation. In addition calling :obj:`woo.dem.ParticleContainer.add`, this method also appropriately sets periodic cell information of the simulation. >>> from woo import pack; from math import *; from woo.dem import *; from woo.core import * >>> sp=pack.SpherePack() Create random periodic packing with 20 spheres: >>> sp.makeCloud((0,0,0),(5,5,5),rMean=.5,rRelFuzz=.5,periodic=True,num=20) 20 Virgin simulation is aperiodic: >>> scene=Scene(fields=[DemField()]) >>> scene.periodic False Add generated packing to the simulation, rotated by 45° along +z >>> sp.toSimulation(scene,rot=Quaternion((0,0,1),pi/4),color=0) [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19] Periodic properties are transferred to the simulation correctly, including rotation: >>> scene.periodic True >>> scene.cell.size Vector3(5,5,5) >>> scene.cell.hSize Matrix3(3.5355339059327373,-3.5355339059327378,0, 3.5355339059327378,3.5355339059327373,0, 0,0,5) The current state (even if rotated) is taken as mechanically undeformed, i.e. with identity transformation: >>> scene.cell.trsf Matrix3(1,0,0, 0,1,0, 0,0,1) :param Quaternion/Matrix3 rot: rotation of the packing, which will be applied on spheres and will be used to set :obj:`woo.core.Cell.trsf` as well. :param kw: passed to :obj:`woo.utils.sphere` :return: list of body ids added (like :obj:`woo.dem.ParticleContainer.add`) """ if isinstance(rot,Quaternion): rot=rot.toRotationMatrix() assert(isinstance(rot,Matrix3)) if self.cellSize!=Vector3.Zero: scene.periodic=True scene.cell.hSize=rot*Matrix3(self.cellSize[0],0,0, 0,self.cellSize[1],0, 0,0,self.cellSize[2]) scene.cell.trsf=Matrix3.Identity from woo.dem import DemField if not self.hasClumps(): if 'mat' not in kw.keys(): kw['mat']=utils.defaultMaterial() return scene.dem.par.add([woo.dem.Sphere.make(rot*c,r,**kw) for c,r in self]) else: standalone,clumps=self.getClumps() # add standalone ids=scene.dem.par.add([woo.dem.Sphere.make(rot*self[i][0],self[i][1],**kw) for i in standalone]) # add clumps clumpIds=[] for clump in clumps: clumpNode=scene.dem.par.addClumped([utils.sphere(rot*(self[i][0]),self[i][1],**kw) for i in clump]) # make all particles within one clump same color (as the first particle), # unless color was already user-specified clumpIds=[n.dem.parRef[0].id for n in clumpNode.dem.nodes] if not 'color' in kw: c0=clumpNode.dem.nodes[0].dem.parRef[0].shape.color for n in clumpNode.dem.nodes[1:]: n.dem.parRef[0].shape.color=c0 return ids+clumpIds
import woo
from woo import utils,pack,plot
from woo.dem import *
from woo.core import *
woo.master.scene=S=Scene(fields=[DemField(gravity=(0,0,-10))])
mat=woo.dem.PelletMat(young=1e6,tanPhi=.5,ktDivKn=.2,density=1000)
if 1:
sp=pack.SpherePack()
sp.makeCloud((0,0,0),(10,10,10),.4,rRelFuzz=.5)
sp.toSimulation(S,mat=mat)
else:
S.dem.par.add(utils.sphere((0,0,1),.5,mat=mat))
S.dem.par.add(utils.wall(0,axis=2,sense=1,mat=mat))
S.engines=utils.defaultEngines(damping=0.,cp2=Cp2_PelletMat_PelletPhys(),law=Law2_L6Geom_PelletPhys_Pellet(plastSplit=True))+[
PyRunner(1,'S.plot.addData(i=S.step,t=S.time,Eerr=(S.energy.relErr() if S.step>100 else 0),**S.energy)'),
]
S.dt=.3*utils.pWaveDt(S)
S.dem.collectNodes()
S.trackEnergy=True
S.saveTmp()
S.plot.plots={'i':(S.energy,None,('Eerr','g--'))}
S.plot.plot()
S.run(500)
#from woo import gl
#gl.Gl1_Wall.div=10
#gl.Gl1_InfCylinder.wire=True
Rs=0.02 # mean particle radius Rf=0.01 # dispersion (Rs±Rf*Rs) nSpheres=1000# number of particles # Create geometry pln=Plane( (-.5, -.5, 0), (.5, -.5, -.05), (.5, .5, 0), (-.5, .5, -.05) ); plnIds=O.bodies.append(pack.gtsSurface2Facets(pln.faces(),material=facetMat,color=(0,1,0))) fct=Plane( (-.25, -.25, .5), (.25, -.25, .5), (.25, .25, .5), (-.25, .25, .5) ); fctIds=O.bodies.append(pack.gtsSurface2Facets(fct.faces(),material=facetMat,color=(1,0,0),noBound=True)) # Create spheres sp=pack.SpherePack(); sp.makeCloud(Vector3(-.5, -.5, 0),Vector3(.5, .5, .2), Rs, Rf, int(nSpheres), False) spheres=O.bodies.append([utils.sphere(s[0],s[1],color=(0.929,0.412,0.412),material=dfltSpheresMat) for s in sp]) for id in spheres: s=O.bodies[id] p=utils.getViscoelasticFromSpheresInteraction(s.state['mass'],tc,en,es) s.mat['kn'],s.mat['cn'],s.mat['ks'],s.mat['cs']=p['kn'],p['cn'],p['ks'],p['cs'] # Create engines O.engines=[ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Facet_Aabb()]), InteractionLoop( [Ig2_Sphere_Sphere_ScGeom(), Ig2_Facet_Sphere_ScGeom()], [Ip2_ViscElMat_ViscElMat_ViscElPhys()], [Law2_ScGeom_ViscElPhys_Basic()], ), GravityEngine(gravity=[0,0,-9.81]),
import sys
sys.path.append('.')
import clDem
from minieigen import *
from woo import utils
m = utils.defaultMaterial()
O.dem.par.append([
utils.wall((0, 0, 0), axis=2, material=m, fixed=True),
utils.sphere((0, 0, 1.3), radius=1, material=m)
])
O.dem.par[-1].vel = (-1., 0, 0)
O.dem.par[-1].angVel = (0, 1, 0)
# O.dem.par[-1].material.tanPhi=0. # no friction
O.scene.dt = .003 * utils.pWaveDt()
O.scene.trackEnergy = True
from woo.dem import *
from woo.core import *
O.scene.engines = [
#PyRunner('if len(O.dem.con)>0 and O.dem.con[0].real: O.pause()'),
Gravity(gravity=(0, 0, -10)),
Leapfrog(damping=.05, reset=True),
InsertionSortCollider([Bo1_Sphere_Aabb(),
Bo1_Wall_Aabb()]),
ContactLoop([Cg2_Sphere_Sphere_L6Geom(),
Cg2_Wall_Sphere_L6Geom()], [Cp2_FrictMat_FrictPhys()],
[Law2_L6Geom_FrictPhys_IdealElPl()],
applyForces=True),
]
import woo.qt
def hexaNet( radius, cornerCoord=[0,0,0], xLength=1., yLength=0.5, mos=0.08, a=0.04, b=0.04, startAtCorner=True, isSymmetric=False, **kw ):
"""Definition of the particles for a hexagonal wire net in the x-y-plane for the WireMatPM.
:param radius: radius of the particle
:param cornerCoord: coordinates of the lower left corner of the net
:param xLenght: net length in x-direction
:param yLenght: net length in y-direction
:param mos: mesh opening size
:param a: length of double-twist
:param b: height of single wire section
:param startAtCorner: if true the generation starts with a double-twist at the lower left corner
:param isSymmetric: defines if the net is symmetric with respect to the y-axis
:return: set of spheres which defines the net (net) and exact dimensions of the net (lx,ly).
note::
This packing works for the WireMatPM only. The particles at the corner are always generated first.
"""
# check input dimension
if(xLength<mos): raise ValueError("xLength must be greather than mos!");
if(yLength<2*a+b): raise ValueError("yLength must be greather than 2*a+b!");
xstart = cornerCoord[0]
ystart = cornerCoord[1]
z = cornerCoord[2]
ab = a+b
# number of double twisted sections in y-direction and real length ly
ny = int( (yLength-a)/ab ) + 1
ly = ny*a+(ny-1)*b
jump=0
# number of sections in x-direction and real length lx
if isSymmetric:
nx = int( xLength/mos ) + 1
lx = (nx-1)*mos
if not startAtCorner:
nx+=-1
else:
nx = int( (xLength-0.5*mos)/mos ) + 1
lx = (nx-1)*mos+0.5*mos
net = []
# generate corner particles
if startAtCorner:
if (ny%2==0): # if ny even no symmetry in y-direction
net+=[utils.sphere((xstart,ystart+ly,z),radius=radius,**kw)] # upper left corner
if isSymmetric:
net+=[utils.sphere((xstart+lx,ystart+ly,z),radius=radius,**kw)] # upper right corner
else:
net+=[utils.sphere((xstart+lx,ystart,z),radius=radius,**kw)] # lower right corner
else: # if ny odd symmetry in y-direction
if not isSymmetric:
net+=[utils.sphere((xstart+lx,ystart,z),radius=radius,**kw)] # lower right corner
net+=[utils.sphere((xstart+lx,ystart+ly,z),radius=radius,**kw)] # upper right corner
jump=1
else: # do not start at corner
if (ny%2==0): # if ny even no symmetry in y-direction
net+=[utils.sphere((xstart,ystart,z),radius=radius,**kw)] # lower left corner
if isSymmetric:
net+=[utils.sphere((xstart+lx,ystart,z),radius=radius,**kw)] # lower right corner
else:
net+=[utils.sphere((xstart+lx,ystart+ly,z),radius=radius,**kw)] # upper right corner
else: # if ny odd symmetry in y-direction
net+=[utils.sphere((xstart,ystart,z),radius=radius,**kw)] # lower left corner
net+=[utils.sphere((xstart,ystart+ly,z),radius=radius,**kw)] # upper left corner
if isSymmetric:
net+=[utils.sphere((xstart+lx,ystart,z),radius=radius,**kw)] # lower right corner
net+=[utils.sphere((xstart+lx,ystart+ly,z),radius=radius,**kw)] # upper right corner
xstart+=0.5*mos
# generate other particles
if isSymmetric:
for i in range(ny):
y = ystart + i*ab
for j in range(nx):
x = xstart + j*mos
# add two particles of one vertical section (double-twist)
net+=[utils.sphere((x,y,z),radius=radius,**kw)]
net+=[utils.sphere((x,y+a,z),radius=radius,**kw)]
# set values for next section
xstart = xstart - 0.5*mos*pow(-1,i+jump)
nx = int(nx + 1*pow(-1,i+jump))
else:
for i in range(ny):
y = ystart + i*ab
for j in range(nx):
x = xstart + j*mos
# add two particles of one vertical section (double-twist)
net+=[utils.sphere((x,y,z),radius=radius,**kw)]
net+=[utils.sphere((x,y+a,z),radius=radius,**kw)]
# set values for next section
xstart = xstart - 0.5*mos*pow(-1,i+jump)
return [net,lx,ly]
NewtonIntegrator(damping=0.0),
###
### NOTE this extra engine:
###
### You want snapshot to be taken every 1 sec (realTimeLim) or every 50 iterations (iterLim),
### whichever comes soones. virtTimeLim attribute is unset, hence virtual time period is not taken into account.
PyRunner(iterPeriod=1,command='myAddPlotData()')
]
## define and append material
mat=FrictMat(young=600.0e6,poisson=0.6,density=2.60e3,frictionAngle=26,label='Friction')
O.materials.append(mat)
## create two spheres (one will be fixed) and append them
from woo import utils
s0=utils.sphere([0,0,0],1,color=[0,1,0],fixed=False,wire=True,material='Friction')
s1=utils.sphere([2,0,0],1,color=[0,2,0],fixed=True,wire=True,material='Friction')
O.bodies.append(s0)
O.bodies.append(s1)
## time step
O.dt=.2*utils.PWaveTimeStep()
O.saveTmp('Mindlin')
from woo import qt
qt.View()
qt.Controller()
############################################
##### now the part pertaining to plots #####
############################################
#!/usr/local/bin/woo-trunk -x
# -*- coding: utf-8 -*-
o=Omega()
o.engines=[
ForceResetter(),
InsertionSortCollider([Bo1_Sphere_Aabb(),]),
IGeomDispatcher([Ig2_Sphere_Sphere_Dem3DofGeom()]),
IPhysDispatcher([Ip2_2xFrictMat_CSPhys()]),
LawDispatcher([Law2_Dem3Dof_CSPhys_CundallStrack()]),
GravityEngine(gravity=[0,0,-9.81]),
NewtonIntegrator(damping = 0.01)
]
from woo import utils
o.bodies.append(utils.sphere([0,0,6],1,dynamic=True, color=[0,1,0]))
o.bodies.append(utils.sphere([0,0,0],1,dynamic = False, color=[0,0,1]))
o.dt=.2*utils.PWaveTimeStep()
from woo import qt
qt.Controller()
qt.View()
def setUp(self):
woo.master.scene=S=Scene(fields=[DemField()])
S.engines=utils.defaultEngines()
S.dem.par.add(utils.sphere((0,0,0),radius=1))
facetMat=O.materials.append(ViscElMat(frictionAngle=frictionAngle,**params)) sphereMat=O.materials.append(ViscElMat(density=density,frictionAngle=frictionAngle,**params)) #floor n=5. s=1./n for i in range(0,n): for j in range(0,n): O.bodies.append([ utils.facet( [(i*s,j*s,0.1),(i*s,(j+1)*s,0.1),((i+1)*s,(j+1)*s,0.1)],material=facetMat), utils.facet( [(i*s,j*s,0.1),((i+1)*s,j*s,0.1),((i+1)*s,(j+1)*s,0.1)],material=facetMat), ]) # Spheres sphId=O.bodies.append([ utils.sphere( (0.5,0.5,0.2), 0.1, material=sphereMat), ]) O.bodies[sphId[-1]].state.vel=(0.5,0,0) ## Engines O.engines=[ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Facet_Aabb()]), InteractionLoop( [Ig2_Facet_Sphere_ScGeom()], [Ip2_ViscElMat_ViscElMat_ViscElPhys()], [Law2_ScGeom_ViscElPhys_Basic()], ), GravityEngine(gravity=[0,0,-9.81]), NewtonIntegrator(damping=0), ]
sphereRadius = 0.01
nbSpheres = (32, 11, 32)
print("Creating %d spheres..." % (nbSpheres[0] * nbSpheres[1] * nbSpheres[2]), end=" ")
for i in range(nbSpheres[0]):
for j in range(nbSpheres[1]):
for k in range(nbSpheres[2]):
x = (i * 2 - nbSpheres[0]) * sphereRadius * 1.1 + sphereRadius * random.uniform(-0.1, 0.1)
y = -j * sphereRadius * 2.2 - 0.01
z = (k * 2 - nbSpheres[2]) * sphereRadius * 1.1 + sphereRadius * random.uniform(-0.1, 0.1)
r = random.uniform(sphereRadius, sphereRadius * 0.9)
dynamic = True
color = [0.51, 0.52, 0.4]
if i == 0 or i == nbSpheres[0] - 1 or j == nbSpheres[1] - 1 or k == 0 or k == nbSpheres[2] - 1:
dynamic = False
color = [0.21, 0.22, 0.1]
O.bodies.append(utils.sphere([x, y, z], r, color=color, dynamic=dynamic))
print("done\n")
## Estimate time step
# O.dt=utils.PWaveTimeStep()
O.dt = 0.0001
## Engines
O.engines = [
## Resets forces and momenta the act on bodies
ForceResetter(),
## Using bounding boxes find possible body collisions.
InsertionSortCollider([Bo1_Sphere_Aabb(), Bo1_Facet_Aabb()]),
InteractionLoop(
# [Ig2_Sphere_Sphere_Dem3DofGeom(),Ig2_Facet_Sphere_Dem3DofGeom()],
"""
Show basic wall functionality (infinite axis-aligned planes).
"""
from woo import utils
O.materials.append(FrictMat(young=30e9,density=1000,poisson=.2,frictionAngle=.5)
O.bodies.append([
utils.wall(1,axis=2,sense=-1),
utils.wall(-5,axis=0,sense=1),
utils.wall(1,axis=1),
utils.wall((1,0,0),0),
utils.sphere([0,0,0],.5),
utils.sphere([-5,-4,-3],.5)
])
Gl1_Wall(div=10)
from woo import qt
qt.Controller()
qt.View()
O.engines=[
ForceResetter(),
InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Facet_Aabb(),Bo1_Wall_Aabb()]),
InteractionLoop(
[Ig2_Sphere_Sphere_Dem3DofGeom(),Ig2_Facet_Sphere_Dem3DofGeom(),Ig2_Wall_Sphere_Dem3DofGeom()],
[Ip2_FrictMat_FrictMat_FrictPhys()],
[Law2_Dem3DofGeom_FrictPhys_CundallStrack()],
),
GravityEngine(gravity=[1e2,1e2,1e2]),
NewtonIntegrator(damping=0.01),
]
from woo import utils sphereRadius=0.1 tc=0.001# collision time en=1 # normal restitution coefficient es=1 # tangential restitution coefficient density=2700 frictionAngle=radians(35)# params=utils.getViscoelasticFromSpheresInteraction(tc,en,es) sphereMat=O.materials.append(ViscElMat(density=density,frictionAngle=frictionAngle,**params)) # Spheres sphId=O.bodies.append([ utils.sphere( (0.4,0.5,0.5), 0.1, material=sphereMat), utils.sphere( (0.6,0.5,0.5), 0.1, material=sphereMat) ]) O.bodies[sphId[-1]].state.vel=(0.5,0,0) O.bodies[sphId[0]].state.vel=(-0.5,0,0) ## Engines O.engines=[ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Facet_Aabb()]), InteractionLoop( [Ig2_Sphere_Sphere_ScGeom()], [Ip2_ViscElMat_ViscElMat_ViscElPhys()], [Law2_ScGeom_ViscElPhys_Basic()], ), NewtonIntegrator(damping=0),
# define piecewise lineare stress-strain curve
strainStressValues=[(0.0019230769,2.5e8),(0.0192,3.2195e8),(0.05,3.8292e8),(0.15,5.1219e8),(0.25,5.5854e8),(0.3,5.6585e8),(0.35,5.6585e8)]
# elastic material properties
particleVolume = 4./3.*pow(radius,3)*pi
particleMass = 3.9/1000.
density = particleMass/particleVolume
young = strainStressValues[0][1] / strainStressValues[0][0]
poisson = 0.3
#### material definition
netMat = O.materials.append(WireMat(young=young,poisson=poisson,density=density,isDoubleTwist=False,diameter=d,strainStressValues=strainStressValues,lambdaEps=0.4,lambdak=0.21))
#### create boddies, default: dynamic=True
O.bodies.append( utils.sphere([0,0,0], radius, wire=False, color=[1,0,0], highlight=False, material=netMat) )
O.bodies.append( utils.sphere([0,a,0], radius, wire=False, color=[0,1,0], highlight=False, material=netMat) )
FixedSphere=O.bodies[0]
MovingSphere=O.bodies[1]
FixedSphere.dynamic=False
MovingSphere.dynamic=False
def addPlotData():
if O.iter < 1:
plot.addData( Fn=0., un=0. )
#plot.saveGnuplot('net-2part-displ-unloading')
else:
try:
i=O.interactions[FixedSphere.id,MovingSphere.id]
from woo import utils
sphereRadius = 0.1
tc = 0.001 # collision time
en = 1 # normal restitution coefficient
es = 1 # tangential restitution coefficient
density = 2700
frictionAngle = radians(35) #
params = utils.getViscoelasticFromSpheresInteraction(tc, en, es)
sphereMat = O.materials.append(
ViscElMat(density=density, frictionAngle=frictionAngle, **params))
# Spheres
sphId = O.bodies.append([
utils.sphere((0.4, 0.5, 0.5), 0.1, material=sphereMat),
utils.sphere((0.6, 0.5, 0.5), 0.1, material=sphereMat)
])
O.bodies[sphId[-1]].state.vel = (0.5, 0, 0)
O.bodies[sphId[0]].state.vel = (-0.5, 0, 0)
## Engines
O.engines = [
ForceResetter(),
InsertionSortCollider([Bo1_Sphere_Aabb(),
Bo1_Facet_Aabb()]),
InteractionLoop(
[Ig2_Sphere_Sphere_ScGeom()],
[Ip2_ViscElMat_ViscElMat_ViscElPhys()],
[Law2_ScGeom_ViscElPhys_Basic()],
),
def setUp(self):
woo.master.scene=S=Scene(fields=[DemField()])
S.engines=utils.defaultEngines()
S.dem.par.add(utils.sphere((0,0,0),radius=1))
poisson=poisson,
density=4800,
sigmaT=sigmaT,
relDuctility=relDuctility,
epsCrackOnset=epsCrackOnset,
G_over_E=G_over_E,
isoPrestress=isoPrestress))
sphDict = pickle.load(open(packingFile))
from woo import pack
sp = pack.SpherePack()
sp.fromList(sphDict['spheres'])
sp.cellSize = sphDict['cell']
import numpy
avgRadius = numpy.average([r for c, r in sp])
O.bodies.append([utils.sphere(c, r, color=utils.randomColor()) for c, r in sp])
O.periodic = True
O.cell.refSize = sp.cellSize
axis = 2
ax1 = (axis + 1) % 3
ax2 = (axis + 2) % 3
O.dt = dtSafety * utils.PWaveTimeStep()
import woo.log
#woo.log.setLevel('PeriTriaxController',woo.log.TRACE)
import woo.plot as yp
O.engines = [
ForceResetter(),
InsertionSortCollider([
Bo1_Sphere_Aabb(aabbEnlargeFactor=intRadius, label='is2aabb'),
far = pack.sweptPolylines2gtsSurface([[
Vector3(-1, -1, -1),
Vector3(-1, 1, -1),
Vector3(-1, 1, 1),
Vector3(-1, -1, 1)
]],
capStart=True,
capEnd=True)
farIds = O.bodies.append(
pack.gtsSurface2Facets(far.faces(), material=facetMat, color=(0, 1, 0)))
# Create clumps...
for j in xrange(10):
clpId, sphId = O.bodies.appendClumped([
utils.sphere(Vector3(0, Rs * 2 * i, (j + 1) * Rs * 2),
Rs,
material=dfltSpheresMat) for i in xrange(4)
])
for id in sphId:
s = O.bodies[id]
p = utils.getViscoelasticFromSpheresInteraction(
s.state.mass, tc, en, es)
s.mat.kn, s.mat.cn, s.mat.ks, s.mat.cs = p['kn'], p['cn'], p['ks'], p[
'cs']
# ... and spheres
sphAloneId = O.bodies.append([
utils.sphere(Vector3(0.5, Rs * 2 * i, (j + 1) * Rs * 2),
Rs,
material=dfltSpheresMat) for i in xrange(4)
])
#!/usr/local/bin/woo-trunk -x
# -*- coding: utf-8 -*-
o = Omega()
o.engines = [
ForceResetter(),
InsertionSortCollider([
Bo1_Sphere_Aabb(),
]),
IGeomDispatcher([Ig2_Sphere_Sphere_Dem3DofGeom()]),
IPhysDispatcher([Ip2_2xFrictMat_CSPhys()]),
LawDispatcher([Law2_Dem3Dof_CSPhys_CundallStrack()]),
GravityEngine(gravity=[0, 0, -9.81]),
NewtonIntegrator(damping=0.01)
]
from woo import utils
o.bodies.append(utils.sphere([0, 0, 6], 1, dynamic=True, color=[0, 1, 0]))
o.bodies.append(utils.sphere([0, 0, 0], 1, dynamic=False, color=[0, 0, 1]))
o.dt = .2 * utils.PWaveTimeStep()
from woo import qt
qt.Controller()
qt.View()
import sys
sys.path.append('.')
import clDem
from minieigen import *
from woo import utils
m=utils.defaultMaterial()
O.dem.par.append([
utils.wall((0,0,0),axis=2,material=m,fixed=True),
utils.sphere((0,0,1.3),radius=1,material=m)
])
O.dem.par[-1].vel=(-1.,0,0)
O.dem.par[-1].angVel=(0,1,0)
# O.dem.par[-1].material.tanPhi=0. # no friction
O.scene.dt=.003*utils.pWaveDt()
O.scene.trackEnergy=True
from woo.dem import *
from woo.core import*
O.scene.engines=[
#PyRunner('if len(O.dem.con)>0 and O.dem.con[0].real: O.pause()'),
Gravity(gravity=(0,0,-10)),
Leapfrog(damping=.05,reset=True),
InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Wall_Aabb()]),
ContactLoop([Cg2_Sphere_Sphere_L6Geom(),Cg2_Wall_Sphere_L6Geom()],[Cp2_FrictMat_FrictPhys()],[Law2_L6Geom_FrictPhys_IdealElPl()],applyForces=True),
]
import woo.qt
woo.qt.View()
O.scene.clDev=(1,0) # intel
sim=woo.cld.CLDemField.wooToClDem(O.scene,stepPeriod=1,relTol=-1)
# The sphere couple is oriented randomly, but the result should always be the same.
#
from woo import utils,plot
import random, woo.log
random.seed()
#woo.log.setLevel('LawTester',woo.log.TRACE)
# sphere's radii
r1,r2=.1,.2
# place sphere 1 at the origin
pt1=Vector3(0,0,0)
# random orientation of the interaction
normal=Vector3(random.random()-.5,random.random()-.5,random.random()-.5)
normal=Vector3.UnitX
O.bodies.append([
utils.sphere(pt1,r1,wire=True,color=(.7,.7,.7)),
utils.sphere(pt1+.999999*(r1+r2)*normal.normalized(),r2,wire=True,color=(0,0,0))
])
O.engines=[
ForceResetter(),
PyRunner(iterPeriod=1,command='import time; time.sleep(.05)'),
InsertionSortCollider([Bo1_Sphere_Aabb()]),
InteractionLoop(
#[Ig2_Sphere_Sphere_ScGeom()], [Ip2_FrictMat_FrictMat_FrictPhys()], [Law2_ScGeom_FrictPhys_CundallStrack()] # ScGeom
#[Ig2_Sphere_Sphere_L3Geom(approxMask=63)],[Ip2_FrictMat_FrictMat_FrictPhys()],[Law2_L3Geom_FrictPhys_ElPerfPl(noBreak=True,noSlip=False)] # L3Geom
[Ig2_Sphere_Sphere_L6Geom(approxMask=63)],[Ip2_FrictMat_FrictMat_FrictPhys()],[Law2_L6Geom_FrictPhys_Linear(charLen=1)] # L6Geom
),
LawTester(ids=[0,1],disPath=[(0,0,0)]*7+[(-1e-5,0,0),(-1e-5,.1,.1)],rotPath=[(0,.2,0),(0,0,0),(0,0,.2),(0,0,0),(.2,0,0),(-.2,0,0),(0,0,0)],pathSteps=[10],doneHook='tester.dead=True; O.pause();',label='tester',rotWeight=0),
#LawTester(ids=[0,1],path=[
# (-1e-5,0,0),(-.1,0,0),(-.1,.1,0),(-1e-5,.1,0), # towards, shear, back to intial normal distance
sp.rotate(*orientation.toAxisAngle())
return filterSpherePack(predicate,sp,mat=mat)
else: print "No suitable packing in database found, running",'PERIODIC compression' if wantPeri else 'triaxial'
sys.stdout.flush()
S=core.Scene(fields=[dem.DemField()])
if wantPeri:
# x1,y1,z1 already computed above
sp=SpherePack()
S.periodic=True
S.cell.setBox(x1,y1,z1)
#print cloudPorosity,beta,gamma,N100,x1,y1,z1,S.cell.refSize
#print x1,y1,z1,radius,rRelFuzz
S.engines=[dem.ForceResetter(),dem.InsertionSortCollider([dem.Bo1_Sphere_Aabb()],verletDist=.05*radius),dem.ContactLoop([dem.Cg2_Sphere_Sphere_L6Geom()],[dem.Cp2_FrictMat_FrictPhys()],[dem.Law2_L6Geom_FrictPhys_IdealElPl()],applyForces=True),dem.Leapfrog(damping=.7,reset=False),dem.PeriIsoCompressor(charLen=2*radius,stresses=[-100e9,-1e8],maxUnbalanced=1e-2,doneHook='print "DONE"; S.stop();',globalUpdateInt=5,keepProportions=True,label='compressor')]
num=sp.makeCloud(Vector3().Zero,S.cell.size0,radius,rRelFuzz,spheresInCell,True)
mat=dem.FrictMat(young=30e9,tanPhi=.5,density=1e3,ktDivKn=.2)
for s in sp: S.dem.par.add(utils.sphere(s[0],s[1],mat=mat))
S.dem.collectNodes()
S.dt=.5*utils.pWaveDt(S)
S.run(); S.wait()
sp=SpherePack(); sp.fromDem(S,S.dem)
#print 'Resulting cellSize',sp.cellSize,'proportions',sp.cellSize[1]/sp.cellSize[0],sp.cellSize[2]/sp.cellSize[0]
# repetition to the required cell size will be done below, after memoizing the result
else:
raise RuntimError("Aperiodic compression not implemented.")
assumedFinalDensity=0.6
V=(4/3)*pi*radius**3; N=assumedFinalDensity*fullDim[0]*fullDim[1]*fullDim[2]/V;
TriaxialTest(
numberOfGrains=int(N),radiusMean=radius,radiusStdDev=rRelFuzz,
# upperCorner is just size ratio, if radiusMean is specified
upperCorner=fullDim,
## no need to touch any the following
import woo
from woo import utils
from woo.core import *
from woo.dem import *
from woo import plot
from woo import *
import woo.log
woo.log.setLevel('LawTester',woo.log.INFO)
woo.log.setLevel('Law2_L6Geom_PelletPhys_Pellet',woo.log.TRACE)
m=FrictMat(density=1e3,young=1e7,ktDivKn=.2,tanPhi=.5)
S=woo.master.scene=Scene(fields=[DemField(gravity=(0,0,0))])
S.dtSafety=0.01
S.dem.par.add([
utils.sphere((0,0,0),.05,fixed=False,wire=True,mat=m),
utils.sphere((0,.10001,0),.05,fixed=False,wire=True,mat=m)
])
S.dem.collectNodes()
# S.engines=utils.defaultEngines(damping=.0,cp2=Cp2_FrictMat_FrictPhys(),law=Law2_L6Geom_FrictPhys_IdealElPl())+[
S.engines=utils.defaultEngines(damping=.0,cp2=Cp2_FrictMat_HertzPhys(gamma=10,en=1.,alpha=.6,label='cp2'),law=Law2_L6Geom_HertzPhys_DMT(),dynDtPeriod=10)+[
LawTester(ids=(0,1),abWeight=.5,smooth=1e-4,stages=[
# LawTesterStage(values=(-1e-0,0,0,0,0,0),whats='ivv...',until='stage.rebound',done='print "Rebound with v0=1e-0m/s"'),LawTesterStage(values=(1e-2,0,0,0,0,0),whats='vvv...',until='not C',done='print "Contact broken."'),
LawTesterStage(values=(-1e-1,0,0,0,0,0),whats='ivv...',until='stage.rebound',done='print "Rebound with v0=1e-1m/s"'),LawTesterStage(values=(1e-2,0,0,0,0,0),whats='vvv...',until='not C',done='print "Contact broken."'),
LawTesterStage(values=(-1e-2,0,0,0,0,0),whats='ivv...',until='stage.rebound',done='print "Rebound with v0=1e-2m/s"'),LawTesterStage(values=(1e-2,0,0,0,0,0),whats='vvv...',until='not C',done='print "Contact broken."'),
#LawTesterStage(values=(-1e-3,0,0,0,0,0),whats='ivv...',until='stage.rebound',done='print "Rebound with v0=1e-3m/s"'),LawTesterStage(values=(1e-3,0,0,0,0,0),whats='vvv...',until='not C',done='print "Contact broken."'),
#LawTesterStage(values=(-1e-4,0,0,0,0,0),whats='ivv...',until='stage.rebound',done='print "Rebound with v0=1e-4m/s"'),LawTesterStage(values=(1e-4,0,0,0,0,0),whats='vvv...',until='not C',done='print "Contact broken."'),
],
done='tester.dead=True; S.stop(); print "Everything done, making myself dead and pausing."',
label='tester'
),
PyRunner(10,'import woo; dd={}; dd.update(**S.lab.tester.fuv()); dd.update(**S.energy); S.plot.addData(i=S.step,dist=(S.dem.par[0].pos-S.dem.par[1].pos).norm(),v1=S.dem.par[0].vel.norm(),v2=S.dem.par[1].vel.norm(),t=S.time,bounces=S.lab.tester.stages[S.lab.tester.stage].bounces,dt=S.dt,**dd)'),
]
