The role of carbon nanofibers on thermo-mechanical properties of polymer matrix composites and their effect on reduction of residual stresses

Ghasemi, Ahmad Reza; Mohammadi, Masoud; Mohandes, Masood

doi:10.1016/j.compositesb.2015.03.065

Cited by 55 publications

(33 citation statements)

References 33 publications

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“…In use of both models, studies have shown good agreement with experimental data, where the Halpin-Tsai model has been shown to fit data well with 5 % variation [33].…”

Section: Common Analytical Models For Experimental Validationmentioning

confidence: 82%

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Mechanical Properties of CNF/Polymer Composites

Poveda

Gupta

2015

Carbon Nanofiber Reinforced Polymer Composites

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This chapter discusses the effect of composition of CNF reinforced nanocomposites on their mechanical properties measured under tensile, compressive, and flexural loading. The structure of the CNFs plays an important role in determining the reinforcement efficiency. In most cases, random CNF dispersed nancomposites have been studied. Thermoplastic resin, thermosetting resin, and elastomer matrix nanocomposites have been studied. Polypropylene is the most common thermoplastic resin that is reinforced with CNFs. Among thermosets, epoxy and vinyl ester resin matrix nanocomposites are studied. The strength and stiffness improve, depending on the volume fractions of CNF dispersed within several different polymer matrices. It is noted that compared to the mechanical properties of single CNFs reported in Chap. 2, the level of enhancement of mechanical properties of nanocomposites is only moderate. The bending of long aspect ratio fibers and stacked-cup structures are potential reasons for this outcome. Nevertheless, combined with other properties, such as electrical and thermal conductivity increase in otherwise insulating resins, the moderately enhanced nanocomposites can develop new applications.Keywords Carbon nanofiber · Nanocomposites · Dispersion · Mechanical property · Flexural properties · Viscoelastic properties Literature ReviewThe potential of using carbon based fibers in developing high performance composite materials has been recognized for a long time [1]. Carbon microfiberbased polymer matrix laminates have been widely studied and used in numerous structural applications. The ever-increasing demand for higher performance fibers and composites has resulted in continuous improvement in the properties of microfibers and also of development of carbon nanofibers and nanotubes. Fibers of different length or diameter scales are sometimes combined into novel structures

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“…In use of both models, studies have shown good agreement with experimental data, where the Halpin-Tsai model has been shown to fit data well with 5 % variation [33].…”

Section: Common Analytical Models For Experimental Validationmentioning

confidence: 82%

“…The Halpin-Tsai model is one such model that has often been modified in order to take random distribution into account [33]. Properties such as the elastic modulus (E c ), shear modulus (G c ), and Poisson's ratio (ν c ) of the composite have been predicted using the following expressions:…”

Section: Common Analytical Models For Experimental Validationmentioning

confidence: 99%

Mechanical Properties of CNF/Polymer Composites

Poveda

Gupta

2015

Carbon Nanofiber Reinforced Polymer Composites

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“…Residual stresses at the macroscopic level could be estimated using the CLT [21,33] by assuming plane stress condition and linear elastic behavior for each ply. Fig.…”

Section: Classical Laminate Theorymentioning

confidence: 99%

Residual stress measurement of fiber metal laminates using incremental hole-drilling technique in consideration of the integral method

Ghasemi

Mohammadi

2016

International Journal of Mechanical Sciences

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In this manuscript, integral method was used for the approximation of residual stresses field in fiber-metal laminates (FMLs). Initially, calibration coefficients matrix for the integral method were determined numerically by the finite element program using ANSYS software. The calibration coefficients were used to relate the measured strains relaxation field with the existing residual stresses prior to the IHD process. Subsequently, FML specimens with symmetric stacking sequence of were manufactured. Next, the IHD experiment by high speed drilling machine were performed and released strains caused by the change in hole-geometry have been obtained. Finally, experimental results from IHD experiment were compared with the theoretical predictions from classical lamination theory. Very good agreements with the experimental and theoretical results show that, the IHD technique can be successfully applied for measuring residual stresses in FML composites.

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“…Ghasemi et al [24] used the Halpin-Tsai theories and the modified Schapery relations to get Young's modulus and CTE of CNF/epoxy and CNF/CF/epoxy. Their results show good agreement with experimental results.…”

Section: Introductionmentioning

confidence: 99%

The SWCNTs roles in stress/strain distribution of three-phase multilayered nanocomposite cylinder under combined internal pressure and thermo-mechanical loading

Ghasemi

Hosseinpour

2018

J Braz. Soc. Mech. Sci. Eng.

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Nanocomposite cylinder can be exposed to the thermal and mechanical loading due to hot fluid that flows through them. In this manuscript, it is intended to get thermal and mechanical single-walled carbon nanotubes (SWCNTs)/glass fiber/epoxy nanocomposite cylinder properties by using micromechanical relations for different weight fractions (wt%). Also, using classical lamination theory, stress-strain and equilibrium equations and strain-displacement relations, the distribution of the radial, hoop and axial stresses and strains in the wall of the three-phase nanocomposite cylinder is obtained for different weight fractions (wt%) of SWCNTs and different lay-ups [35/-35/90/90] and [55/55/-55/-55]. The results demonstrated that the addition of the SWCNTs to the epoxy can reduce all strains in the wall and also reduce the strain difference between two layers with different fiber angle. Also, the effect of reduction in axial and hoop stress depends on angle fiber of lay-up.

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The role of carbon nanofibers on thermo-mechanical properties of polymer matrix composites and their effect on reduction of residual stresses

Cited by 55 publications

References 33 publications

Mechanical Properties of CNF/Polymer Composites

Mechanical Properties of CNF/Polymer Composites

Residual stress measurement of fiber metal laminates using incremental hole-drilling technique in consideration of the integral method

The SWCNTs roles in stress/strain distribution of three-phase multilayered nanocomposite cylinder under combined internal pressure and thermo-mechanical loading

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