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[jasperb <question688458@xxxxxxxxxxxxxxxxxxxxx>]

New question #688458 on Yade:
https://answers.launchpad.net/yade/+question/688458

Hi
I encountered a weird thing..
I was preparing a dense sample(composed of polydisperse spheres initially generated by makeCloud and the friction angle is set to zero) by using PeriTriaxController.

A mini script goes like below:

.............................................................................................................................................................................

triax=PeriTriaxController(
	dynCell=True,
	mass=0.2,
	maxUnbalanced=stabilityThreshold,
	relStressTol=0.005,
	growDamping=0,
	goal=(-1000,-1000,-1000),
	stressMask = 7, #the vertical direction of wall is controlled by rate of strain
	globUpdate=1000,
	maxStrainRate=(0.01,0.01,0.01),
	doneHook='generating1()'
)
newton=NewtonIntegrator(damping=damp) #set non-viscous damping

#set one triaxial loop
O.engines=[
	ForceResetter(),
	InsertionSortCollider([Bo1_Sphere_Aabb()]),
	InteractionLoop(
		[Ig2_Sphere_Sphere_ScGeom()],
		[Ip2_FrictMat_FrictMat_FrictPhys()],
		[Law2_ScGeom_FrictPhys_CundallStrack()]
	),
	GlobalStiffnessTimeStepper(active=True,timeStepUpdateInterval=100,timestepSafetyCoefficient=0.9),
	triax,
	newton,
	PyRunner(iterPeriod = 1000, command = 'history()')
]

def generating1():
	newton.damping = 0.4
	triax.relStressTol=0.005
	triax.goal=(-2000,-2000,-2000)
	triax.doneHook='generating1_1()'

.............................................................................................................................................................................


Things go quite well and the porosity is below 0.4 after 24h's compression. And the visualization is right a compacted sample inside the cell box.
And then I want to export the sphere information about its position and radius.So I typed export.text(filename='').
But when I ymport this sample infomation, i got a cluster of exploded spheres( each far away from the other), which is totally different from what I saw in the sampleGeneration.py.

Could you help me with this? 

Thanks

Japser


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