engleski

Equivalent beam model of SWNT and DWNT with imperfections

The influence of the carbon nanotube’s characteristics on the mechanical properties of nanocomposites has been, and still is the subject of a large number of scientific papers. The numerical method approach for modelling the carbon nanotubes and nanocomposite materials is proven and effective, but nevertheless has some disadvantages. Also, different defects within carbon nanotubes structure, like vacancies, as well as the waviness of the nanotubes, considerably influence the mechanical properties of the nanotubes and thus deteriorate the final mechanical properties of the nanocomposites. The paper at hand presents and examines the equivalent beam finite element model of single and double walled carbon nanotubes of different patterns, based on the data obtained by structural mechanics FEM model from authors’ previous works. Several examples of armchair and zig-zag pattern for single walled carbon nanotube and armchair, zig – zag and two chiral patterns for double walled carbon nanotubes, with different vacancies and waviness ratio, are prepared and examined.

carbon nanotubes, finite element method, imperfections, equivalent beam model, mechanical properties

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