Vibration of rotating multiscale nanocomposite cantilever beams

Abstract eng:
We studied the linear free vibrations of thin-walled carbon nanotubes/fibre/polymer laminated multiscale composite beams. A set of nonlinear intrinsic equations describing the response of rotating cantilever composite beams undergoing large deformations was discretized by the Galerkin method and solved for natural frequencies and mode shapes. Halpin—Tsai equations and fibre micromechanics were used to predict the bulk material properties of the multiscale nanocomposite. The carbon nanotubes (CNTs) were assumed to be uniformly distributed and randomly oriented through the epoxy resin matrix. The weight percentages of single-walled and multi-walled carbon nanotubes (SWCNTs and MWCNTs) were investigated through a detailed parametric study for their effects on the natural frequencies. It was found that natural frequencies are significantly influenced by a small percentage of CNTs.

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