Thermoelastic vibration analysis of functionally graded wavy carbon nanotube‐reinforced cylinders

Abstract

In this study, free vibration behavior of functionally graded carbon nanotube‐reinforced composite (FG‐CNTRC) cylinders subjected to uniform temperature environment or thermal gradient loading is investigated by a mesh‐free method. The nanocomposite cylinders are made of a polymer matrix and wavy single‐walled carbon nanotubes (SWCNTs). The volume fraction of carbon nanotubes (CNTs) are assumed variable along the radial direction of the axisymmetric cylinder. Also, material properties of the polymer and CNT are assumed temperature‐dependent and mechanical properties of the nanocomposite are estimated by a micromechanical model in volume fraction form. In the mesh‐free analysis, moving least squares shape functions are used to approximate displacement field in the weak form of motion equation and the transformation method is used to impose essential boundary conditions. The material properties and natural frequency of the nanocomposite cylinders are derived after the derivation of cylinder temperature and by considering of the temperature and location. Effects of CNT distribution pattern and volume fraction, thermal, cylinder dimensions and CNT aspect ratio and waviness are investigated on the vibration behavior of the nanocomposite cylinders. POLYM. COMPOS., 39:E826–E834, 2018. © 2017 Society of Plastics Engineers

Mechanical characterization of polycarbonate reinforced with nanoclay and graphene oxide

“…Moradi‐Dastjerdi et al investigated the thermo‐elastic behavior of poly(methyl methacrylate) (PMMA) reinforced with functionally graded carbon nanotubes (FG‐CNT) under thermal and mechanical loadings in an analytical way and using mesh‐free technique. They showed that fillers led to the improvement of thermal and mechanical properties.…”

Low-velocity impact response of nanotube-reinforced composite sandwich curved panels

“…The material properties of PMMA are listed in table 1 [24]. The material properties of the sandwich panel core are listed in table 2 [28]. The material properties of CNTs mentioned in this paper are presented in table 3 [24] with G cn 13 ¼ G cn 12 .…”

“…Since FG-CNTRC's impact response analysis gradually matured recently, scholars have researched lots of FG-CNTRC structures' impact response [25][26][27][28]. Wang et al [29] discussed FG-CNTRC plates' low-velocity impact response on the basis of von Kármán nonlinearity as well as a high-order shear deformation theory.…”

Graphene and CNT impact on heat transfer response of nanocomposite cylinders

“…Shokri-Oojghaz [24] stud-ied the effect of reinforcing with aggregated CNT on the stress distributions of nanocomposite sandwich cylinders based on finite element method. Temperature effect on the static and dynamic responses of nanocomposite cylinders reinforced with wavy CNT were studied by Moradi-Dastjerdi et al [25][26][27]. Safaei et al [28] analyzed the free vibration of nanocomposite plates with CNTs embedded in amorphous polyethylene.…”