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General questions


Hello all,

Hope everybody had a great time during this Christmas period.

Few general questions on Yade for users:

1) I would like to know why Yade performs the calculation of the contact stiffnesses using the Poisson’s ratio and the Young’s modulus, instead of just assigning ks and kn for each particle. If I say it correctly, the latter was the case in SDEC (that in practise implies having the same contact stiffness for each particle). So, why in Yade did you choose to specify the Young’s modulus and the Poisson’s ratio? Actually I see that in this way we obtain different contact stiffnesses for each particle, but which is the advantage? Just to know..

2) Concerning the display of the force network between bodies.. Has anybody implemented the possibility to display also the intensity of the force network, I mean different thicknesses according to the amount of the contact forces? Probably someone else have already asked this question but I don’t remember whether he received or not any answer..

3) Again according to the display of the force network, is this visualization referred to the real contacts, is not it? Are also the virtual contacts somehow visualized?

4) I have to start to implement my own engine for a new contact law.. Which release of Yade do you suggest me to start with? Putting it better, I know that the implementation of Yade is a work in progress, but for example I see you have recently changed the names of many variables.. For me it is not so simple to follow every release and if I need to add something I suppose I have to start with a specific one. I know this fact depends on the purpose I have, but is there a quite “stable” version of Yade according to the last changes?

Many thanks for your answers.


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