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Re: General questions
> For me ("advantage" depends on your goals), the main advantage was to
> get a constant ratio between local stiffness parameters and stiffness of
> the packing. Changing particles sizes will not affect this ratio. If you
> like non-dimensional problems, you should like this.
> Another advantage is, the Y. modulus of the dense packing will be of the
> same order of magnitude as the modulus you give in the beginnng. You
> have an a-priori estimate.
> For Poisson, the name is only due to the fact that Poisson's ratio
> depends mostly on ks/kn. But there is no constant - not even linear -
> relation between the micro and the macro in that case.
There is if spheres have constant radii (ν=(1-kt/kn)/(4+kt/kn)). For
Young, macro modulus is proportional to (1-2ν)kn, depending on packing
density. (not yet published)
> Last bzr snapshot is probably the best option. It will be totaly stable
> as long as you don't update it. ;)
> The best is to try and update frequently however, always keep backups of
> working code before any update. In the worst case (i.e. you realize
> after a few weeks that you spent more time solving conflicts, filling
> bug reports, or negotiating changes in somebody else's code, than
> actually writing your law), you can always resume working offline.
As long as you work on your own piece of code, you will typically have
no interference with others.