Abstract
In this paper the mechanical models for nanocomposites are discussed focussing on the main restrictions of the first order models. It is proposed, according to some results for the second order models, to include in the mechanical approach some geometrical parameters to handle the transition from to scale to scale, but also to refer the modelling to an expedient class of functions which naturally describe the scale transition. Keywords: nanocomposites, first order models, second order models, wave propagation, wavelets