Increasing the fatigue resistance of epoxy nanocomposites by aligning graphene nanoplatelets

Bhasin, Mukesh; Wu, Shuying; Ladani, Raj B.; Kinloch, A. J.; Wang, Chun H.; Mouritz, A.P.

doi:10.1016/j.ijfatigue.2018.04.001

Cited by 26 publications

(19 citation statements)

References 51 publications

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“…Bhasin et al . [23] have dispersed, using a three-roll mill, GNPs in an epoxy resin which was cured at room temperature using an amine hardener. The epoxy polymers possessed a glass transition temperature of about 90°C.…”

Section: Resultsmentioning

confidence: 99%

Fatigue crack growth in epoxy polymer nanocomposites

Kinloch

Jones

Michopoulos

2021

Phil. Trans. R. Soc. A.

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The present paper describes detailed analyses of experimental data for the cyclic-fatigue behaviour of epoxy nanocomposite polymers. It has been shown that the data may be interpreted using the Hartman–Schijve relationship to yield a unique, ‘master’, linear relationship for each epoxy nanocomposite polymer. By fitting the experimental data to the Hartman–Schijve relationship, two key materials parameters may be deduced: (i) the term A , which may be thought of as the fatigue equivalent to the quasi-static value of the fracture energy, G c , and (ii) the fatigue threshold value, Δ G thr , below which no significant fatigue crack growth (FCG) occurs. It has then been established that the values of these parameters, together with the slope, n , and intercept, D , of the Hartman–Schijve master relationship, may be used (i) to compute the experimental results measured for the fatigue behaviour of the epoxy nanocomposite polymers, (ii) to understand the observed fracture and fatigue behaviour of these materials with respect to the structure of the epoxy nanocomposite polymers, and (iii) to deduce the ‘upper-bound’, i.e. ‘worst-case’, FCG rate curve which may be used by industry as a material development, material selection, design and service-life prediction tool when these epoxy nanocomposite polymers are used in engineering applications such as structural adhesives and/or as matrices in fibre-reinforced composites. This article is part of a discussion meeting issue ‘A cracking approach to inventing new tough materials: fracture stranger than friction’.

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Section: Resultsmentioning

confidence: 99%

Fatigue crack growth in epoxy polymer nanocomposites

Kinloch

Jones

Michopoulos

2021

Phil. Trans. R. Soc. A.

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“…These nanofillers drew attention due to their flexible properties, allowing us to create multi-functional composite materials that can be used for a range of applications such as aerospace, energy storage, and electromagnetic interference shielding [ 1 , 2 , 3 ]. Two-dimensional nanomaterials such as graphene, due to their high aspect ratio (AR), offer increased fatigue resistance and fracture toughness through deflection of crack propagation and bridging mechanics [ 4 , 5 , 6 ]. However, such fillers are hydrophobic and do not form bonds with polymers.…”

Section: Introductionmentioning

confidence: 99%

Novel Hybrid Polymer Composites with Graphene and MXene Nano-Reinforcements: Computational Analysis

et al. 2021

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This paper presents a computational analysis on the mechanical and damage behavior of novel hybrid polymer composites with graphene and MXene nano-reinforcements targeted for flexible electronics and advanced high-strength structural applications with additional functions, such as real-time monitoring of structural integrity. Geometrical models of three-dimensional representative volume elements of various configurations were generated, and a computational model based on the micromechanical finite element method was developed and solved using an explicit dynamic solver. The influence of the geometrical orientation, aspect ratio, and volume fractions of the inclusions, as well as the interface properties between the nano-reinforcements and the matrix on the mechanical behavior, was determined. The results of the presented research give initial insights about the mechanical and damage behavior of the proposed composites and provide insight for future design iterations of similar multifunctional materials.

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“…Several researchers have studied fatigue life of epoxy nanocomposites which mostly incorporate CNTs (e.g., [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ]) and rarely rGO [ 16 ] and GNPs [ 14 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ]. Rafael et al [ 24 ] appeared to be the first researchers studying the effect of graphene nanoparticles on fatigue and fracture properties of two-phase epoxy polymers reinforced with different weight percentages of GNPs.…”

Section: Introductionmentioning

confidence: 99%

“…They also showed that at higher energy release-rates, the CNFs played a larger role at resisting the fast fatigue crack growth when compared to the GNPs. As a mechanism of improving the fatigue property of epoxy nanocomposites, Bhasin et al [ 23 ] assessed the effectiveness of electric field orientation of GNPs. The authors showed that the orientation of the GNPs caused by an electric field led to more enhancement in the fatigue crack growth resistance of the resin compared to that produced by adding randomly-aligned GNPs, especially in the near threshold region.…”

Section: Introductionmentioning

confidence: 99%

Significant Fatigue Life Enhancement in Multiscale Doubly-Modified Fiber/Epoxy Nanocomposites with Graphene Nanoplatelets and Reduced-Graphene Oxide

et al. 2020

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We report the fatigue behavior of a novel multiscale fiberglass/epoxy composite modified with reduced-graphene oxide (rGO) and graphene nanoplatelets (GNP). A novel and cost-effective fabrication method based on vacuum assisted resin transfer molding (VARTM) method was used for manufacturing the composite laminates. Morphological and mechanical analysis of composites showed a successful dispersion of nano-fillers and a remarkable improvement in fatigue life of the nanocomposites. The experimental results revealed that all rGO concentrations resulted in a significant increase in fatigue life of the nanocomposites. These enhancements can be explained by the creation of stronger links between the nanoparticles fiberglass and epoxy. The experimental results also showed that lower concentrations of GNPs lead to an increase in fatigue life of nanocomposites; however, a decrease in their fatigue life can be seen at higher loadings.

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Increasing the fatigue resistance of epoxy nanocomposites by aligning graphene nanoplatelets

Cited by 26 publications

References 51 publications

Fatigue crack growth in epoxy polymer nanocomposites

Fatigue crack growth in epoxy polymer nanocomposites

Novel Hybrid Polymer Composites with Graphene and MXene Nano-Reinforcements: Computational Analysis

Significant Fatigue Life Enhancement in Multiscale Doubly-Modified Fiber/Epoxy Nanocomposites with Graphene Nanoplatelets and Reduced-Graphene Oxide

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