It is shown by molecular dynamics method using the chain model that the transverse compression of a multilayer packing of identical parallel single-walled carbon nanotubes on a flat substrate can be elastic only for their diameter D 2.5 nm, a multilayer packing is a multistable system with a large number of stationary states, which are characterized by the portion of collapsed nanotubes (the packing thickness decreases monotonically with increasing fraction of such nanotubes). For nanotubes with a chirality index (60, 0) (D = 4.69 nm), the thickness of 11-layer packing can change from 12 to 36 nm depending on the fraction of collapsed nanotubes. The transverse compression of such a packing leads to plastic deformations. Such a compression transforms the packing from one stationary state to another with a smaller thickness only due to collapse of a part of nanotubes. Simulation of dynamics shows that all stationary states of the packing are stable to thermal vibrations.
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