Abstract
This article focused on further investigation of passive vibration damping of a cantilever plate using carbon nanotube/epoxy nanocomposite. A damping ratio depends on many factors, for example carbon nanotube content, type of carbon nanotubes, and frequency, so the epoxy composite reinforced with 0.2 wt. % multi-wall carbon nanotubes has been used with structural damping. Dynamic analysis for an aluminum cantilever plate has been studied to determine the effect of the epoxy nanocomposite material on the plate vibration. The main goal of the study was to minimize the frequency response function amplitude and shift the resonant frequency of the plate as high as possible, especially for the fundamental frequency. An finite element model exhibited an increase in the resonant frequency by 10.6% and 1.2% in addition to a reduction in the frequency response function amplitude by 79.5% and 43.26% at the first and second bending modes, respectively, when using 0.2 wt. % multi-wall carbon nanotubes/epoxy circular patches at an optimal position compared with the bare plate. In case of using a stiffener below the plate, the results exposed an increase in resonant frequency by 154.6% and 181.7%, whereas the frequency response function amplitude showed reduction by 95.9% and 98.2% at the first and second bending modes, respectively, when using three stiffeners of multi-wall carbon nanotubes/epoxy nanocomposite with the same mass of circular patches compared also with the bare plate.
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