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[Jan Stránský <question265830@xxxxxxxxxxxxxxxxxxxxx>]

Question #265830 on Yade changed:
https://answers.launchpad.net/yade/+question/265830

Jan Stránský proposed the following answer:
Hi Behzad,
thanks for explanation. I still see no problem there :-) imagine a two
plates and just one sphere. Then this behavior you observe seems completely
ok for me..
cheers
Jan


2015-04-25 1:11 GMT+02:00 behzad <question265830@xxxxxxxxxxxxxxxxxxxxx>:

> Question #265830 on Yade changed:
> https://answers.launchpad.net/yade/+question/265830
>
> behzad posted a new comment:
> Hi Jan,
>
> Thanks for the answer.
> That's good that we can set the stiffness for certain interactions.
>
> What I'm doing is measuring viscoelastic properties of a material. I
> sandwich the material between two plates and then a sinusoidal force (and
> so stress) is applied to the upper plate. The plate goes up and down.
> So, we have the sinusoidal curve of the applied stress and we're looking
> to get the sinusoidal curve of induced displacement(strain).  Thus we can
> calculate the Dynamic modulus of the material.
> E*=Stress_amplitude/Strain_amplitude.
>
> I'd like to have a very stiff contacts of sphere-plate so all the
> deformation to come from the testing material (spheres).
>
> - The loading plates have CohFrictMat as the material
>
> -Spheres have CohBurgersMat as the material which is a cohesive
> viscoelastic material.
>
> -Sphere-Plate contacts are CohFrictPhys and soa tensile and compressive
> sinusoidal force can be applied.
>
> Sphere-sphere interactions are CohBurgersPhys and that's what matters
> for me. I'd like to get the response of these contacts to the dynamic
> straining.
>
> I hope the problem is clear now.
>
> Cheers,
> Behzad
>
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