Hi Vaclav, just a curiosity;) I have been reading your paper "Discrete continuum models and their implementation" (good material, btw) and I come over the definition of normal strain once particles overlap. May I ask you if this is a proper definition? Are not we talking about rigid bodies, are we? I can see that the overlap accounts for a sort of deformation, but can we really define a normal or shear strain dealing with rigid bodies?
Thanks for your answer, Chiara
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