New question #696604 on Yade:
https://answers.launchpad.net/yade/+question/696604
I want to study cohesive interactions between clumps during a cone penetration
test. I have a code creating clumps from several spheres. At the creation of
clumps (initial state), there is no interaction between the spheres for a given
clump. But as soon as the simulation is running, interactions between spheres
of a same clump are created. Therefore my simulations are taking longer time
than it should.
I have tried 2 technics for the clump creation but it does not change the
behaviour:
1- yade.O.bodies.appendClumped([list of sphere([x,y,z],radius,material)])
2- yade.O.bodies.append(sphere((x,y,z),radius,material))
yade.O.bodies.clump([list of sphere])
My material is defined as following:
material = yade.CohFrictMat(young=1e8,
poisson=0.3,
density=917,
frictionAngle=0.2,
normalCohesion=1e6,
shearCohesion=1e6,
momentRotationLaw=True,
etaRoll=-1,
alphaKr=2,
alphaKtw=2,
label='cohesive')
yade.O.materials.append(material)
My engines are defined as following:
Igeom_s = [yade.Ig2_Sphere_Sphere_ScGeom6D(),
yade.Ig2_Facet_Sphere_ScGeom6D()]
Iphys_s =
[yade.Ip2_CohFrictMat_CohFrictMat_CohFrictPhys(setCohesionNow=False)]
Law2_s =
[yade.Law2_ScGeom6D_CohFrictPhys_CohesionMoment(useIncrementalForm=True,
always_use_moment_law=False)]
yade.O.engines = [yade.ForceResetter(),
yade.InsertionSortCollider([yade.Bo1_Sphere_Aabb(),
yade.Bo1_Facet_Aabb()]),
yade.InteractionLoop(Igeom_s, Iphys_s, Law2_s),
yade.NewtonIntegrator(damping=damping,
gravity=yade.Vector3(0, 0, -9.81 / mass_factor), label='Newton')
]
I first define my material, then engines and then I create clumps.
I am very confused with this issue as from what I have read/been told, yade is
not computing sphere-sphere interactions within clump. Do you have any idea of
what is causing this? I don't know if it matters but I am using yade 2018.02b.
Thanks for your help
Clémence
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