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[Jan Stránský <question247963@xxxxxxxxxxxxxxxxxxxxx>]

Question #247963 on Yade changed:
https://answers.launchpad.net/yade/+question/247963

    Status: Open => Answered

Jan Stránský proposed the following answer:
Hi Behzad,

please do not add further questions to already closed topic if your new
question is not related.

I tried your script combined from first and last post, but the geometry
seems to be a bit strange.. Could you please open a new question and post a
complete script?

thanks
Jan



2014-05-02 17:06 GMT+02:00 behzad majidi <
question247963@xxxxxxxxxxxxxxxxxxxxx>:

> Question #247963 on Yade changed:
> https://answers.launchpad.net/yade/+question/247963
>
>     Status: Solved => Open
>
> behzad majidi is still having a problem:
> but, there's a little problem here.
> I added to facets with a material with Young's of 100 times bigger than
> the spheres;
>
>
> id_Mat2=O.materials.append(FrictMat(young=1e10,poisson=0.3,density=1000,frictionAngle=1))
> Rigid=O.materials[id_Mat2]
>
> box_1 = O.bodies.append(box((0,0,0),(1,1,.001),fixed=True,material=Rigid))
> box_2 =
> O.bodies.append(box((0,0,4.3),(1,1,.0001),dynamic=False,fixed=False,material=Rigid))
>
> then I set a velocity to the upper facet:
>
> O.bodies[box_2].state.vel=(0,0,-0.001)
>
> and I asked for the unbalanced force on the upper(or lower) ball in z
> direction to be plotted:
>
> def AutoData():
>         plot.addData(t=O.iter,F=O.forces.f(1)[2])
>
>
> plot.plots={'t':('F')}
> plot.plot()
>
>
> The probable is  it does not give a linear response as we expect for
> elastic behavior. I was expecting to obtain a line by which I can calculate
> the Young modulus of the material.
> Is this because of the contact model here? or what?
>
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