Studies on Effective Elastic Properties of CNT/Nano-Clay Reinforced Polymer Hybrid Composite

Thakur, Arvind; Kumar, Puneet; Srinivas, J.

doi:10.1088/1757-899x/115/1/012007

Cited by 13 publications

(6 citation statements)

References 18 publications

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“…In this regard, Kundalwal and Ray (2011) have also performed an analytical analysis to determine the overall elastic properties of CNTs grown fuzzy fiber reinforced hybrid composite and found that elastic properties in transverse direction are improved significantly. Similarly, other studies (Islam et al, 2015;Thakur et al, 2016) have shown the significant enhancement in elastic and thermo-elastic properties of hybrid composite with the addition of small amount of nanoparticles. Koratkar et al (2003) suggested 30 percent increase in bending stiffness and 200 percent in damping level of piezo-silica composite beam with sub-layers of nano-film.…”

Section: Introductionmentioning

confidence: 52%

Free vibration, bending and buckling of a FG-CNT reinforced composite beam

Kumar

Srinivas

2017

MMMS

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Purpose The purpose of this paper is to perform a numerical analysis on the static and dynamic behaviors of beams made up of functionally graded carbon nanotube (FG-CNT) reinforced polymer and hybrid laminated composite containing the layers of carbon reinforced polymer with CNT. Conventional fibers have higher density as compared to carbon nanotubes (CNTs), thus insertion of FG-CNT reinforced polymer layer in fiber reinforced composite (FRC) structures makes them sustainable candidate for weight critical applications. Design/methodology/approach In this context, stress and strain formulations of a multi-layer composite system is determined with the help of Timoshenko hypothesis and then the principle of virtual work is employed to derive the governing equations of motion. Herein, extended rule of mixture and conventional micromechanics relations are used to evaluate the material properties of carbon nanotube reinforced composite (CNTRC) layer and FRC layer, respectively. A generalized eigenvalue problem is formulated using finite element approach and is solved for single layer FG-CNTRC beam and multi-layer laminated hybrid composite beam by a user-interactive MATLAB code. Findings First, the natural frequencies of FG-CNTRC beam are computed and compared with previously available results as well as with Ritz approximation outcomes. Further, free vibration, bending, and buckling analysis is carried out for FG-CNTRC beam to interpret the effect of different CNT volume fraction, number of walls in nanotube, distribution profiles, boundary conditions, and beam-slenderness ratios. Originality/value A free vibration analysis of hybrid laminated composite beam with two different layer stacking sequence is performed to present the advantages of hybrid laminated beam over the conventional FRC beam.

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Section: Introductionmentioning

confidence: 52%

Free vibration, bending and buckling of a FG-CNT reinforced composite beam

Kumar

Srinivas

2017

MMMS

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“…Carbon nanotubes (CNTs), one of the nanofillers, have attracted the attention of many researchers worldwide due to their excellent properties, including very high stiffness of about 1 TPa [5]. The mechanical performance of matrices, like metal and polymer, is improved by adding a small amount of CNT [6][7]. Perez-Bustamante et al [8] and Sridhar et al [9] discovered in separate investigations that the yield and ultimate strengths both rise by 90% when 2% by weight of multi-walled carbon nanotubes (MWCNTs) are added to an Aluminium matrix.…”

Section: Introductionmentioning

confidence: 99%

Micromechanics-Based Thermo-Mechanical Simulation of SCS-6 Fiber-Reinforced Ti-6Al-7Nb Matrix Nanocomposite

Thakur

Kumar

2023

MSF

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This paper uses a sequential micromechanical method to characterize the thermomechanical properties of a hybrid nanocomposite. It does this by using analytical models (such as the modified rule of mixtures, Tsai-Pagano model, and Schapery model) and numerical models (such as the Finite element model), which are modeled using the commercial software ABAQUS. Investigations are made to determine how the aspect ratio, waviness, and volume fractions of the reinforcement affect the thermo-mechanical performance of the hybrid nanocomposite. It has been shown that adding CNT ESFs to conventional SiC-reinforced titanium alloy composites (TMCs) improves the resulting HTMNC thermo-mechanical properties. It is found that the addition of CNT ESFs to TMCs improves the thermo-mechanical characteristics of the resulting hybrid nanocomposite (i.e., HTMNCs) more in the transverse direction than in the axial direction for all volume fractions of SiC fiber. For instance, it is observed that adding a 2.69% volume fraction of CNT ESFs to the TMCs with a 30% volume fraction of SiC fiber enhances the axial elastic modulus by 2.6% and 2.4% while increasing the transverse elastic modulus by 4.2% and 3.5%, based on the CNT ESFs are straight and wavy. On the other hand, for the same volume fraction of SiC fiber and the addition of 2.69% volume fraction of Straight CNT ESFs, the transverse and axial CTE of the HTMNCs are reduced by 5.33% and 2.53%, respectively. Moreover, when the SiC fiber aspect ratio increases, the axial elastic modulus increases while the transverse elastic modulus exhibits no change. In contrast to the elastic modulus, the CTE increases in the transverse direction while decreasing in the axial direction.

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“…We use functionalized montmorillonite nanoclay, which consists of small clay platelets that act as a physical barrier against the impregnating oxygen. Nanoclay and PA mixtures have been studied before for such a purpose, but to our knowledge not beyond the 3 wt.% loading [6]. We hereby will test the loading of up to 10 wt.% and use a commercial PA masterbatch to assess its potential applicability as a low-cost food storage packaging material.…”

Section: Introduction *mentioning

confidence: 99%

Improving the Oxygen Barrier of Polyamide Food Packaging by Using Nanoclay

Paara

Lange

Saal

et al. 2022

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The effect of nanoclay additive on polyamide film oxygen permeability is investigated from the perspective of possible use as a laminate component for low-cost food packaging material. Montmorillonite nanoclay was melt-mixed in an industrial grade polyamide by twin-screw extrusion and the mixture was hot-pressed to a ~50 µm thick film. The film with 10 wt.% of nanoclay loading showed a 17 % decrease in the oxygen transmission rate (OTR), as compared to the pristine polyamide film (72 and 87 cm3/m2∙24 h, respectively). Despite the relatively high loading of the filler the obtained OTR exceeds that of the food packaging preferred upper limit of 10 cm3/m2∙24 h. XRD measurements confirmed the near-complete exfoliation of the nanoclay platelets. The platelets were found to be at an average angle of 9.5 degrees relative to the film’s surface plane. To comply with the requirements for food packaging, this angle needs to be decreased down to 0.4 degrees. To achieve this, different film-making methods enabling better control over the filler particles’ orientation need to be explored. Nanoclay addition increased the films’ yield strength (23 % for 10 wt.% film) and stiffness, while not affecting the films’ optical appearance.

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Studies on Effective Elastic Properties of CNT/Nano-Clay Reinforced Polymer Hybrid Composite

Cited by 13 publications

References 18 publications

Free vibration, bending and buckling of a FG-CNT reinforced composite beam

Free vibration, bending and buckling of a FG-CNT reinforced composite beam

Micromechanics-Based Thermo-Mechanical Simulation of SCS-6 Fiber-Reinforced Ti-6Al-7Nb Matrix Nanocomposite

Improving the Oxygen Barrier of Polyamide Food Packaging by Using Nanoclay

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