New question #700596 on Yade:
https://answers.launchpad.net/yade/+question/700596
Hello,
When I run my script,the prompt as shown in the title appears.
Actually,I search the forum and found [1] [2].But I see different solutions in
these two links, which makes me very confused.
In [1],the solution is to use DFNFlowEngine instead of FlowEngine.In [2],the
solution is to reduce the time step.
These are obviously two completely different solutions, and I don't know which
one applies to me.
Following is my script:
-
from yade import pack, ymport, plot, utils, export, timing
from builtins import range
import numpy as np
#from __future__ import print_function
import sys
rate=-0.01
damp=0.4
stabilityThreshold=0.001
key='_triax_base_'
young=20e9
name='JCFPM_triax'
#targetPorosity=0.43
compFricDegree=30
poisson=0.1
mn,mx=Vector3(0,0,0),Vector3(0.05,0.05,0.05)
O.materials.append(JCFpmMat(type=1,density=2640,young=young,poisson=poisson,tensileStrength=15e6,cohesion=30e6,frictionAngle=radians(60),label='sphere'))
O.materials.append(JCFpmMat(type=1,frictionAngle=0,density=0,label='wall'))
walls=aabbWalls([mn,mx],thickness=0,material='wall')
wallIds=O.bodies.append(walls)
O.bodies.append(ymport.text('packing-JCFPM.spheres',scale=1,shift=Vector3(0,0,0),material='sphere',color=(0.6,0.5,0.15)))
triax=TriaxialStressController(
maxMultiplier=1.+4e8/young,
finalMaxMultiplier=1.+4e7/young,
thickness = 0,
stressMask = 7,
internalCompaction=True,
)
newton=NewtonIntegrator(damping=damp)
O.timingEnabled=True
def recorder():
yade.plot.addData(
i=O.iter,
e11=-triax.strain[0],e22=-triax.strain[1],e33=-triax.strain[2],
s11=-triax.stress(triax.wall_right_id)[0],#0+边界id为right
s22=-triax.stress(triax.wall_top_id)[1],#1+边界id为top
s33=-triax.stress(triax.wall_front_id)[2],#2+边界id为front
P=triax.porosity,
#meanS=-triax.meanStress[2]
ev=triax.volumetricStrain,
numberTc=interactionLaw.nbTensCracks,
numberSc=interactionLaw.nbShearCracks,
unb=unbalancedForce()
)
plot.saveDataTxt('triax_JCFPM_HM_Wy=10.0Mpa,Sy=2.0MPa')
def stop_condition():
if abs(triax.strain[2]) > 0.01:
O.pause()
presentcohesive_count = 0
for i in O.interactions:
if hasattr(i.phys, 'isCohesive'):
if i.phys.isCohesive == 1:
presentcohesive_count+=1
print('the number of cohesive bond now
is:',presentcohesive_count)
O.engines=[
ForceResetter(),
InsertionSortCollider([Bo1_Sphere_Aabb(aabbEnlargeFactor=1.3,label='is2aabb'),Bo1_Box_Aabb()]),
InteractionLoop(
[Ig2_Sphere_Sphere_ScGeom(interactionDetectionFactor=1.3,label='ss2sc'),Ig2_Box_Sphere_ScGeom()],
[Ip2_JCFpmMat_JCFpmMat_JCFpmPhys()],
[Law2_ScGeom_JCFpmPhys_JointedCohesiveFrictionalPM(recordCracks=True,Key='triax_JCFPM_HM',label='interactionLaw')]
),
GlobalStiffnessTimeStepper(active=1,timeStepUpdateInterval=100,timestepSafetyCoefficient=0.8),
triax,
#TriaxialStateRecorder(iterPeriod=100,file='WallStresses'+key),
FlowEngine(dead=1,label='flow'),
PyRunner(iterPeriod=int(1000),initRun=True,command='recorder()',label='data',dead=0),
PyRunner(iterPeriod=1000,command='stop_condition()',dead=0),
newton,
]
O.step()
ss2sc.interactionDetectionFactor=-1
is2aabb.aabbEnlargeFactor=-1
triax.goal1=triax.goal2=triax.goal3=-10e6
yade.timing.reset()
while 1:
O.run(1000,1)
unb=unbalancedForce()
print('unbalanced force:',unb,'mean stres:',triax.meanStress)
if unbhttps://answers.launchpad.net/yade/+question/690716
[2]https://answers.launchpad.net/yade/+question/670765
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