Mechanical properties of nanocomposite laminated structure and its sensibility to modal analysis procedure

Abstract

In this work, tensile and shear modulus, as well as Poisson's ratio of a woven orthotropic nanocomposite plate were determined from vibration data. Plates used in the experiment were 16 layers S2-glass/epoxy composite manufactured by vacuum assisted wet layup. The nanocomposite plate was obtained by adding 0%, 1%, 2%, 5% and 10% nanoclays in weight to the epoxy matrix. A Finite Element model of the composite plate combined with a gradient method was applied to obtain an approximate numerical solution to experimental data in order to estimate the mechanical properties. Two different modal procedures were employed: the Laser Anemometry and Hammer test. A modal analysis was made in both cases to determine structural mode shape and associated frequencies, modal and mechanical properties for different nanoclay composite plates, as well as assessing its sensitivity to Modal Analysis.

Nano-Modified Epoxy Based Adhesive Testings: An Investigation into Apparent Shear Strength, Failure Modes, Chemical Functionals, and Microstructural Failure

“…The results reported by Leão et al [20] are consistent with the ones described by Avila et al [21] for nanoclay/epoxy systems, where vibration modes were affected by the nanoclay addition. A later study performed by Duarte et al [22] identified different vibration behaviors based on the amount of nanoclay dispersed and its spatial distribution. The nanoparticles' dispersion into epoxy systems can easily be performed using a high-shear mixer with temperature control.…”

An experimental study on the nonlinear free vibration response of epoxy and carbon fiber-reinforced composite containing single-walled carbon nanotubes

“…These studies are limited to a linear domain. Nanotube, nano-clay, nano-silica and carbon nanotube are the most important nanoparticles that were used in these studies (Ávila et al., 2008; Chandradass et al., 2007; Duarte et al., 2014; Huang and Tsai, 2015; Khan et al., 2011; Rajini et al., 2013; Velmurugan and Balaganesan, 2011). For illustration of the relative researches, several papers were noted afterward.…”

“…The impulse hammer technique was used to find natural frequency and damping factor of laminates (Velmurugan and Balaganesan, 2011). In the research of Duarte et al. (2014) tensile and shear modulus, as well as Poisson’s ratio of a woven nanocomposite plate was determined from vibrational data.…”

“…(2014) tensile and shear modulus, as well as Poisson’s ratio of a woven nanocomposite plate was determined from vibrational data. In this research two different modal procedures were employed: laser anemometry and the hammer test (Duarte et al., 2014). Chandradass et al.…”