Effect of orientation of CNTs and piezoelectric fibers on the damping performance of multiscale composite plate

Abstract

The present work deals with the study of active constrained layer damping treatment of multiscale carbon nanotube-based hybrid carbon fiber-reinforced composite plates. The distinctive feature of novel multiscale hybrid carbon fiber-reinforced composites is that the wavy/straight carbon nanotubes are distributed uniformly in the matrix phase of hybrid carbon fiber-reinforced composites, and the waviness of carbon nanotubes is considered to be coplanar with two mutually orthogonal planes. Firstly, the effective elastic properties of hybrid carbon fiber-reinforced composites are estimated using the Mori-Tanaka method. The outcomes of the Mori-Tanaka method suggest that the transverse effective elastic properties of hybrid carbon fiber-reinforced composites containing wavy carbon nanotubes are better than those of hybrid carbon fiber-reinforced composites with straight carbon nanotubes. Secondly, a finite element model using the layer-wise first-order shear deformation theory is developed to study the damping performance of hybrid carbon fiber-reinforced composite plates integrated with the active constrained layer damping treatment. The constraining layer of active constrained layer damping treatment is a 1–3 piezoelectric composite layer with vertically/obliquely-oriented piezo-fibers. The piezo-fibers make an angle [Formula: see text] with the vertical plane of a layer coplanar with the xz- or yz-plane. The effect of the orientation of piezo-fibers angle on the control authority of active constrained layer damping treatment patches is investigated. Our results reveal that the performance of multiscale hybrid carbon fiber-reinforced composite plates has improved due to the incorporation of wavy carbon nanotubes, and the orientation angle of piezo-fibers has a major impact on the control authority of active constrained layer damping patches. The proposed multiscale composite with the combination of wavy carbon nanotubes and active constrained layer damping patches can be actively used in the aerospace and transport industries to control the mechanical vibrations of structures.

Conductive polymer nanocomposite incorporated with carbon nanotubes for effective electromagnetic interference shielding: A numerical study

“…In terms of reinforcement, typical CPCs composed of carbon fibers and stainless steel fibers have been used as shielding materials, although to a lesser extent, due to the high filler concentration required to achieve adequate shielding 26,27 . When compared to polymers filled with micro‐sized carbon filler, those filled with nano‐sized carbon filler showed higher EMI SE at the same filler loading 28–30 . CNTs are commonly used in CPC fabrication because of their higher electrical conductivity, higher thermal conductivity, 31 and larger surface area compared to other conductive nanofillers, such as graphene, carbon nanofiber, and carbon black 32 .…”

“…26,27 When compared to polymers filled with micro-sized carbon filler, those filled with nano-sized carbon filler showed higher EMI SE at the same filler loading. [28][29][30] CNTs are commonly used in CPC fabrication because of their higher electrical conductivity, higher thermal conductivity, 31 and larger surface area compared to other conductive nanofillers, such as graphene, carbon nanofiber, and carbon black. 32 Consequently, the incorporation of CNTs in polymers can achieve high EMI SE with lesser content of CNTs.…”