On 21 April 2010 14:53, Bruno Chareyre <[email protected]> wrote:
> > >> My simplest explanation is actually in the documentation of the class, > let me know if it is not clear enough : > > /"The compliance of one sphere under symetric point loads is defined here > as 1/(E.D), with E the stiffness of the sphere and D its diameter, and > corresponds to a compliance 1/(2.E.D) from each contact point. The > compliance of the contact itself will be the sum of compliances from each > sphere, i.e. 1/(2.E.D1)+1/(2.E.D1) in the general case, or 1/(E.D) in the > special case of equal sizes. Note that summing compliances corresponds to an > harmonic average of stiffnesss, which is how kn is actually computed in the > :yref:`Ip2_FrictMat_FrictMat_FrictPhys` functor." > / > > Hi Bruno, in your explanation you reference the particles diameters, in fact in Yade we use the radii so that if particles have same geometry k_eq=E.R. I guess it does not really change the substance of the matter. cheers, Chiara
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