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Two basic features of continuum description of nanocomposite materials are discussed in the framework of structural mechanics of materials and construction units. First, a continuum as a basic notion in mechanics of materials is considered, where the principle of continualization is stated and the notion of representative volume is introduced. Then, some facts from the theory of composite materials are shown and commented. Here, the principle of homogenization is stated and two basic models of theory of composite materials (homogeneous body and piecewise homogeneous body) are described. The first feature is formulated as an invalidity of the principle of continualization in some types of nanoformations used as fillers in nanocomposite materials. The second feature is stated as a necessity of transition from the two-component structure to the three-component structure of nanosized composite materials. Also, the kind of nanocomposites is considered, which needs the four-component models. Both features are commented and accompanied by examples.

On Features of Continuum Description of Nanocomposite Materials