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[Ziyu Wang <question700285@xxxxxxxxxxxxxxxxxxxxx>]

New question #700285 on Yade:
https://answers.launchpad.net/yade/+question/700285

Hello,

I want to study the change law of rock strength under triaxial compression under osmotic pressure.Then I write the following script.But When I run it,the running speed is very very slow(iter:3.0/s).Where is the problem?

Thanks for help!

######################################
from yade import pack, ymport, plot, utils, export, timing
from builtins import range 
import numpy as np

rate=-0.01
damp=0.4
stabilityThreshold=0.001
key='_triax_base_'
young=20e9
name='JCFPM_triax'
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=1e7,cohesion=2e7,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)))
### (The model imported here is a cube of about 5000 particles generated by Randomdensepack)

triax=TriaxialStressController(
	maxMultiplier=1.+2e7/young, 
	finalMaxMultiplier=1.+2e6/young, 
	thickness = 0,
	stressMask = 7,
	internalCompaction=True, 
)
newton=NewtonIntegrator(damping=damp)
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]) > 0.015:
		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),
	newton,
	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),

]

O.step()
ss2sc.interactionDetectionFactor=-1
is2aabb.aabbEnlargeFactor=-1

triax.goal1=triax.goal2=triax.goal3=-10e6
while 1:
	O.run(1000,1)
	unb=unbalancedForce()
	print('unbalanced force:',unb,'mean stres:',triax.meanStress)
	if unb<stabilityThreshold and abs(-10000000-triax.meanStress)/10000000<0.001:
		break

flow.dead=0
flow.meshUpdateInterval=2
flow.useSolver=4
flow.permeabilityFactor=1
flow.viscosity=1
flow.bndCondIsPressure=[0,0,0,0,1,1]
flow.bndCondValue=[0,0,0,0,2e6,0]

triax.internalCompaction=False
triax.stressMask=3
triax.goal1=-1e7
triax.goal2=-1e7
triax.goal3=rate


plot.plots={'e33':('s33',None,'unb'),'i':('numberTc','numberSc',None,'s33')}
plot.plot()
O.run()
################################################
Best wishes!



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