Mechanical characterization of graphite/epoxy nanocomposites by multi-scale analysis

Cho, J.; Luo, Jianqiang; Daniel, I. M.

doi:10.1016/j.compscitech.2007.01.006

Cited by 161 publications

(104 citation statements)

References 32 publications

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“…All parameters such as radii, length, boundary condition, material properties and interfacial bonding used in ANSYS simulations are selected the same with those in the shear-lag model. Poisson's ratio, v is selected as 0.006 [18]. In addition, one more element is implemented in ANSYS as the interphase, which represents the interface interaction between two adjacent CNT layers.…”

Section: Finite Element Methodsmentioning

confidence: 99%

A studying on load transfer in carbon nanotube/epoxy composites under tension

Việt

Wang

Kuo

2017

Journal of Modeling in Mechanics and Materials

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Abstract:The shear-lag model is developed to study the effect of geometry and material properties of epoxy and carbon nanotubes on load transfer in carbon nanotube/epoxy composites under tension. The results from proposed shear-lag model are validated by finite element method and the Haque's model. Results show that the aspect ratio of the half-length to the outer radius of carbon nanotubes and their layer number have significant influence on load transfer in the composites. On the other hand, this research reveals new findings, which are not reported in other previous works. That is, no noticeable influences of the epoxy Young's modulus and the interface shear modulus between epoxy matrix and carbon nanotube layers are found on load transfer in terms of the saturated stress length. In addition, the carbon nanotube volume percentage is found not affecting the load transfer. This research presents a better understanding on mechanical properties of carbon nanotube/epoxy composites.

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Section: Finite Element Methodsmentioning

confidence: 99%

A studying on load transfer in carbon nanotube/epoxy composites under tension

Việt

Wang

Kuo

2017

Journal of Modeling in Mechanics and Materials

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“…The high strength and stiffness of graphene significantly improve the mechanical properties of polymer nanocomposites. Cho et al studied the mechanical properties of graphene-epoxy nanocomposites with a combination of MM and Mori-Tanaka Method (MTM) [37]. The properties of nanocomposites are also dependent on the polymer chain networking.…”

Section: Modeling Of Graphene Based Polymer Nanocompositesmentioning

confidence: 99%

Modeling and Simulation of Graphene Based Polymer Nanocomposites: Advances in the Last Decade

Atif¹,

Inam²

2016

Graphene

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Modeling and simulation allow methodical variation of material properties beyond the capacity of experimental methods. The polymers are one of the most commonly used matrices of choice for composites and have found applications in numerous fields. The stiff and fragile structure of monolithic polymers leads to the innate cracks to cause fracture and therefore the engineering applications of monolithic polymers, requiring robust damage tolerance and high fracture toughness, are not ubiquitous. In addition, when "many-parts" cling together to form polymers, a labyrinth of molecules results, which does not offer to electrons and phonons a smooth and continuous passageway. Therefore, the monolithic polymers are bad conductors of heat and electricity. However, it is well established that when polymers are embedded with suitable entities especially nano-fillers, such as metallic oxides, clays, carbon nanotubes, and other carbonaceous materials, their performance is propitiously improved. Among various additives, graphene has recently been employed as nano-filler to enhance mechanical, thermal, electrical, and functional properties of polymers. In this review, advances in the modeling and simulation of grapheme based polymer nanocomposites will be discussed in terms of graphene structure, topographical features, interfacial interactions, dispersion state, aspect ratio, weight fraction, and trade-off between variables and overall performance.

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“…When the strain is small, the relationship between the stress and strain appear linear. According to relevant data from Morse potential (Xiao et al (2005);Cho et al (2007)), one has ǫ a = 0.05 leading to σ a = 72.3 GP a and ǫ cr = 0.185 leading to σ cr = 128 GP a.…”

Section: Evaluation Of Elastic Moduli Of the Graphene Sheetmentioning

confidence: 99%

“…In molecular mechanics, the total potential energy of the Graphene sheet can be expressed as a sum of several energy terms as proposed by Cho et al (2007). Under in-plane loading (Fig.1), the modified Morse potential function and its constants were adopted to describe the elastic behaviour.…”

Section: Evaluation Of Elastic Moduli Of the Graphene Sheetmentioning

confidence: 99%

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Non-linear elastic moduli of Graphene sheet-reinforced polymer composites

Elmarakbi

Wang

Azoti

2016

International Journal of Solids and Structures

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The non-linear elastic moduli of the Graphene sheet-reinforced polymer composite are investigated using a combined molecular mechanics theory and continuum homogenisation tools. Under uniaxial loading, the linear and non-linear constitutive equations of the Graphene sheet are derived from a Taylor series expansion in powers of strains. Based on the modified Morse potential, the elastic moduli and Poisson's ratio are obtained for the Graphene sheet leading to the derivation of the non-linear stiffness tensor. For homogenisation purpose, the strain concentration tensor is computed by the means of the irreducible decomposition of the Eshelby's tensor for an arbitrary domain. Therefore, a mathematical expression of the averaged Eshelby's tensor for a rectangular shape is obtained for the Graphene sheet. Under the Mori-Tanaka micro-mechanics scheme, the effective non-linear behaviour is predicted for various micro-parameters such as the aspect ratio and mass fractions. Numerical results highlight the effect of such micro-parameters on the anisotropic degree of the composite.

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Mechanical characterization of graphite/epoxy nanocomposites by multi-scale analysis

Cited by 161 publications

References 32 publications

A studying on load transfer in carbon nanotube/epoxy composites under tension

A studying on load transfer in carbon nanotube/epoxy composites under tension

Modeling and Simulation of Graphene Based Polymer Nanocomposites: Advances in the Last Decade

Non-linear elastic moduli of Graphene sheet-reinforced polymer composites

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