Re: [Yade-users] [Question #697615]: displacement vs friction graph plotting
Question #697615 on Yade changed:
https://answers.launchpad.net/yade/+question/697615
Status: Needs information => Open
Pawan gave more information on the question:
Sorry for the inconvenience, I am new to this platform.
I have sorted my code till here
from yade import plot
idSteel=O.materials.append(FrictMat(young=210e9,poisson=.25,frictionAngle=.8,label="steel"))
#material
sp=sphere((0,0,0),1,material=idSteel) #sphere
plate=box((0,0,-1),(10,100,0),material=idSteel) #plate
plateID=O.bodies.append(plate) #plateID=0
spID=O.bodies.append(sp) #spID=1
sp.state.blockedDOFs = "xyXYZ" #sphere movement z dir allowed
O.forces.setPermF(1,(0,0,-1)) # 1 mag. force on sphere in -ve z direction
plate.state.blockedDOFs = "xyzXYZ" #plate movement blocked
plate.state.vel =(0,.02,0) #plate given const. velocity in y direction
#engine
O.engines=[ForceResetter(),
InteractionLoop(
[Ig2_Box_Sphere_ScGeom()],
[Ip2_FrictMat_FrictMat_FrictPhys()],
[Law2_ScGeom_FrictPhys_CundallStrack()]
),
NewtonIntegrator(),
PyRunner(iterPeriod=500,command="addPlotData()")
]
def addPlotData():
Dz=plate.state.displ()
Fz=O.forces.f(plateID)
plot.addData(i=O.iter,Fz=Fz,Dz=Dz)
plot.plots={'Dz':('Fz')}
plot.plot()
O.dt=0.5*PWaveTimeStep()
O.saveTmp()
Here what I am trying to do is fixing a sphere particle on a moving plate. A
normal load is applied on the sphere the same thing as we do in the shear
test ..but here with a single particle.
Now I want to record the friction at the interface with the displacement of the
plate.
The problem that I feel is the normal force applied is not getting
transferred to the interface and hence no friction is recorded.
For the friction force, I have taken force on the plateas the only
force on the plate in a moving direction will be friction.
Kindly help me with this .
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Re: [Yade-users] [Question #697642]: Many errors with PeriodicFlowEngine
Question #697642 on Yade changed: https://answers.launchpad.net/yade/+question/697642 Status: Solved => Open Zhicheng Gao is still having a problem: So how to delete the previous FlowEngine? -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
Re: [Yade-users] [Question #697642]: Many errors with PeriodicFlowEngine
Question #697642 on Yade changed: https://answers.launchpad.net/yade/+question/697642 Status: Answered => Solved Zhicheng Gao confirmed that the question is solved: Thanks Bruno Chareyre, that solved my question. -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
Re: [Yade-users] [Question #697548]: Simulating the time-dependent behavior of single grain
Question #697548 on Yade changed: https://answers.launchpad.net/yade/+question/697548 Du Zhang posted a new comment: Thank you for your reply and suggestions. > the biggest problem in "time length" of your problem Yes, a long time is the most important in my topic. I also looked at the tutorial examples and other examples you provided. There are a few concrete examples that look like the one I want to simulate, but unfortunately, they are all short-term as you said. I also read the document, from this I learned about time step and period. > some implicit integration scheme Actually, I don’t understand this very much. > Some "long-time-step" approach for "calm" periods without breakage, skipping > to explicit time integration when breaking occurs until it stabilizes, then > again "long-time-step" approach... It feels like a solution, but I don’t know how good the result will be and actually don't know how to start. > Are new contacts important to your problem? Contacts between grain and steel or grain and grain are important I think. But the contact model can be other. Thanks a lot again! best, Du Zhang -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
Re: [Yade-users] [Question #697642]: Many errors with PeriodicFlowEngine
Question #697642 on Yade changed: https://answers.launchpad.net/yade/+question/697642 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, removing particles is not expected with flow engine. I think the simplest solution is to delete the previous FlowEngine after erasing some particles, and replace it with a fresh one. Probably a good feature would be to let FlowEngine be reset, to avoid such replacement, but the effect is the same. I hope it helps Bruno -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
