Question #293790 on Yade changed:
https://answers.launchpad.net/yade/+question/293790
Status: Answered => Open
Alejandro Jiménez is still having a problem:
Thank you both for your answers and I am sorry I didn't provide any
example before, this is my first question in the forum. Here it is now,
to better clarify my point, you can see that there is no contact and
therefore no load transfer between the lateral boxfacets and the
spheres:
###Import libraries
from yade import geom,pack,plot
###Materials definition
mat_bri = O.materials.append(CpmMat(young=9.792e9, #[Pa]
frictionAngle=radians(30), #[rad]
*hint ---> radians(degrees value)
poisson=.17, #[-]
density=2000*1.91, #[kg/m3]
sigmaT=2e6, #Initial cohesion
[Pa]
relDuctility=100, #Ductility of
bonds in normal direction
epsCrackOnset=2.38e-4))
##Facet material
mat_fac = O.materials.append(FrictMat(young=210e9, poisson=.15, density=3000,
frictionAngle=1))
##Box material
kwBoxes = {'color':[1,1,0],'wire':False,'dynamic':False, 'material':1}
###Geometry definition
##Wall geometry parameters
r=.0025
pComp = 1e6 #Pre-compression in Pa
spheres=[]
for i in range(0, trunc(.2*10000-r*10000), trunc(r*20000)):
for k in range(0, trunc(.3*10000-r*10000),trunc(r*20000)):
O.bodies.append(sphere([r+i/10000.,0.0,r+k/10000.],radius=r,
material=mat_bri))
left_load = O.bodies.append(utils.geom.facetBox((.225,0,.15),
Vector3(.025,r/2.,.15), orientation=Quaternion((1,0,0),0), wallMask=63,
**kwBoxes))
right_load = O.bodies.append(utils.geom.facetBox((-.025,0,.15),
Vector3(.025,r/2.,.15), orientation=Quaternion((1,0,0),0), wallMask=63,
**kwBoxes))
dis_ele_1 = O.bodies.append(utils.geom.facetBox((.1,0,.325),
Vector3(.025,r/2.,.025), orientation=Quaternion((1,0,0),0), wallMask=63,
**kwBoxes))
fix_ele_1 = O.bodies.append(utils.geom.facetBox((.025,0,-.025),
Vector3(.025,r/2.,.025), orientation=Quaternion((1,0,0),0), wallMask=63,
**kwBoxes))
fix_ele_1 = O.bodies.append(utils.geom.facetBox((.175,0,-.025),
Vector3(.025,r/2.,.025), orientation=Quaternion((1,0,0),0), wallMask=63,
**kwBoxes))
###Engines definition
O.engines = [ForceResetter(),
InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Facet_Aabb()]),
InteractionLoop([Ig2_Sphere_Sphere_ScGeom(interactionDetectionFactor =
1.1),Ig2_Facet_Sphere_ScGeom()],
[Ip2_CpmMat_CpmMat_CpmPhys(),
Ip2_FrictMat_CpmMat_FrictPhys(), Ip2_FrictMat_FrictMat_FrictPhys()],
[Law2_ScGeom_CpmPhys_Cpm(),
Law2_ScGeom_FrictPhys_CundallStrack()]),
ForceEngine(dead = False,
force = [pComp * r * .01,0,0],
ids = left_load,
label = 'precompre_left'),
ForceEngine(dead = False,
force = [-pComp * r * .01 ,0,0],
ids = right_load,
label = 'precompre_right'),
NewtonIntegrator(damping=.4,gravity=[0,0,-9.81]),
CpmStateUpdater(realPeriod=.5),
TranslationEngine(translationAxis=[0,0,1],
velocity = -7.e-3,
ids = dis_ele_1,
dead = False,
label='translat'),
PyRunner(command='CallForce()', iterPeriod=500)
]
O.dt = 1e-6
##Ploting Force against displacement
def CallForce():
fc=0
for b in dis_ele_1:
fc += O.forces.f(b)[2]
dt = O.time
disp = dt*7.e-6*1000
plot.addData(force=fc, displacement=disp)
plot.plots = {'displacement':('force')}
plot.plot()
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