yade-users team mailing list archive

[ceguo <question189913@xxxxxxxxxxxxxxxxxxxxx>]

Question #189913 on Yade changed:
https://answers.launchpad.net/yade/+question/189913

    Status: Answered => Open

ceguo is still having a problem:
Thanks,

I notice the missing of brackets for a function. Regarding to the last problem, I use the example script just with modification from Dem3DofGeom to ScGeom (Dem3DofGeom works, but as I read the doc which suggest us using ScGeom instead.)
#============================================================
"Test and demonstrate use of PeriTriaxController."
from yade import *
from yade import pack,log,qt
log.setLevel('PeriTriaxController',log.TRACE)
O.periodic=True
O.cell.refSize=Vector3(.1,.1,.1)
#O.cell.Hsize=Matrix3(0.1,0,0, 0,0.1,0, 0,0,0.1)
sp=pack.SpherePack()
radius=5e-3
num=sp.makeCloud(Vector3().Zero,O.cell.refSize,radius,.2,500,periodic=True) # min,max,radius,rRelFuzz,spheresInCell,periodic
O.bodies.append([utils.sphere(s[0],s[1]) for s in sp])

O.engines=[
	ForceResetter(),
	InsertionSortCollider([Bo1_Sphere_Aabb()],nBins=5,sweepLength=.05*radius),
	InteractionLoop(
		[Ig2_Sphere_Sphere_ScGeom()],
		[Ip2_FrictMat_FrictMat_FrictPhys()],
		[Law2_ScGeom_FrictPhys_CundallStrack()]
	),
	PeriTriaxController(dynCell=True,mass=0.2,maxUnbalanced=0.01,relStressTol=0.02,goal=(-1e4,-1e4,0),stressMask=3,globUpdate=5,maxStrainRate=(1.,1.,1.),doneHook='triaxDone()',label='triax'),
	NewtonIntegrator(damping=.2),
]
O.dt=utils.PWaveTimeStep()
O.run();
qt.View()

phase=0
def triaxDone():
	global phase
	if phase==0:
		print 'Here we are: stress',triax.stress,'strain',triax.strain,'stiffness',triax.stiff
		print 'Now 蔚z will go from 0 to .2 while 蟽x and 蟽y will be kept the same.'
		print 'Porosity',utils.porosity
		triax.goal=(-1e4,-1e4,-0.2)
		phase+=1
	elif phase==1:
		print 'Here we are: stress',triax.stress,'strain',triax.strain,'stiffness',triax.stiff
		print 'Porosity',utils.porosity
		print 'Done, pausing now.'
		O.pause()
		
The problem is the compression will go on endlessly as there is no stress generated to reach the goal.

Ning

-- 
You received this question notification because you are a member of
yade-users, which is an answer contact for Yade.