Investigation on the flexural response of multiscale anisogrid composite panels reinforced with carbon fibers and multi-walled carbon nanotubes

Eslami‐Farsani, Reza; Shahrabi-Farahani, Alireza

doi:10.1177/0021998317704981

Cited by 12 publications

(6 citation statements)

References 51 publications

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“…[30][31][32] For example, the results from Hassanzadeh-Aghdam 33 revealed that the addition of silica nanoparticles could improve the elastic modulus in the transverse direction. Numerous researchers have established mechanical models for the stiffening effect of the applied rigid particles on the resin, and the corresponding theoretical predictions can be achieved, [34][35][36][37][38][39][40][41][42] and for different epoxy systems, the effect on the compression strength is different. The reason for this effect may be that for the low modulus DDS-cured epoxy resin system, when subjected to higher compression loads, the resin system without the addition of Al 2 O 3 nanoparticles undergoes local instability.…”

Section: Mechanical Properties Of Epoxy Resinmentioning

confidence: 99%

Preparation and compression mechanical properties of carbon fiber/epoxy nanoparticle composites

Zhong¹,

Zhang²,

Bao³

et al. 2022

High Performance Polymers

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In this work, the epoxy resin cured with chlorinated fluorene amine as the curing agent was obtained, which significantly increased the resin modulus and did not reduce the impact toughness, compared with the common curing system. Al2O3 nanoparticles were used to stiffen the new curing epoxy system, which did not reduce the compression strength of the resin but increased the compression modulus. The microscopic morphology showed that the rigid particles were uniformly dispersed in the resin matrix, and the addition of rigid particles mildly affected the reactional and rheological properties of the resin system. The minimum viscosity of the matrix increased with the additional number of particles. The composite was prepared using the nanoparticle-modified epoxy resin with carbon fiber (CF), and the compression strength of the composite was significantly improved by nearly 30% compared with that composed of the common epoxy system.

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Section: Mechanical Properties Of Epoxy Resinmentioning

confidence: 99%

Preparation and compression mechanical properties of carbon fiber/epoxy nanoparticle composites

Zhong¹,

Zhang²,

Bao³

et al. 2022

High Performance Polymers

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“…Also, a comprehensive sensitivity analysis [ 26 ] was performed on some of the key design variables of anisogrid cylindrical shells that dominantly affect its structural reliability. Carbon nanotubes were [ 27 ] incorporated in various weight percentages and evaluated the flexural response of anisogrid composite panels. A notable improvement in the interfacial properties of matrix and fibers, flexural stiffness, and energy absorption capabilities were observed in that study.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical studies on the low‐velocity impact response of carbon fiber‐reinforced polymer anisogrid cylindrical shells

Paramasivam¹,

Johnson²

2022

Polymer Composites

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This work presents the experimental and finite element (FE) simulations to investigate the behavior of both unstiffened and anisogrid composite cylindrical shells subjected to low‐velocity axial impact. Impact damage has been an epidemic problem for composite structures. Even subjected to a low‐velocity impact, thin‐walled composite structures may sacrifice its load‐carrying capacity considerably due to various modes of failure. A low cost, reliable and innovative manufacturing process is proposed for the production of anisogrid cylindrical lattice structures. Initially, test coupons are fabricated as per American Society for Testing of Materials (ASTM) standards and inspected using infrared (IR) thermography to find the imperfections incurred during fabrication. The test coupons without defects were only taken into account for material characterization. FE simulations were carried out on both the unstiffened and anisogrid shells using LS‐DYNA® for a series of low‐velocity impacts. Also these shell structures were subjected to impact loading experimentally for the validation of the numerical results. The results of these studies indicate that the anisogrid model presented in this work possesses a great load‐carrying capacity than an unstiffened shell under dynamic loading conditions, also the weight of the structure has been reduced up to 51.27%. Numerical simulation results are in good agreement with the experimental data, having less than 11.56% of maximum deviation on the energy absorption value.

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“…The results of these studies show that the mechanical properties of nanocomposites increase significantly by adding CNTs as fillers. 3…”

Section: Introductionmentioning

confidence: 99%

Free vibration of piezoelectric boron nitride nanotube-based composite cylindrical micropanel embedded in an elastic medium subjected to electric potential via modified strain gradient theory

Ghasemi-Ghalebahman

Bigdeli-Yeganeh

Cheloeian

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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This paper deals with the free vibration analysis of a smart polymeric composite sandwich micropanel made of polyvinylidene fluoride reinforced by single-walled boron nitride nanotubes resting on an elastic substrate under an electric field. The analysis procedure is based on the first-order shear deformation theory and modified strain gradient theory to investigate the size-dependent effect. The nanotubes are assumed to be uniformly distributed within the polymeric matrix. The elastomeric substrate is modeled using Winkler springs and a Pasternak shear layer. First, the constitutive equations of the nanocomposite are derived for a unit cell using a micro-electromechanics modeling technique, and the stress–strain relations are subsequently obtained with regard to mechanical and electrical terms. The equations of motion of the micropanel are obtained based on the Hamilton principle. Finally, the natural frequencies of the micropanel are obtained by extracting the mass and stiffness matrices through the method of variational calculus. A parametric study is further performed to investigate the effect of various parameters such as the stiffness of the elastic medium, the effect of electric field, different modes of vibration, aspect ratio, and so on. It is observed that the panel’s stiffness and, consequently, the natural frequency decrease as the aspect ratio increases and the nanotube volume fraction reduces. A comparison is also conducted with the classical continuum theory and modified coupled stress theory.

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Investigation on the flexural response of multiscale anisogrid composite panels reinforced with carbon fibers and multi-walled carbon nanotubes

Cited by 12 publications

References 51 publications

Preparation and compression mechanical properties of carbon fiber/epoxy nanoparticle composites

Preparation and compression mechanical properties of carbon fiber/epoxy nanoparticle composites

Experimental and numerical studies on the low‐velocity impact response of carbon fiber‐reinforced polymer anisogrid cylindrical shells

Free vibration of piezoelectric boron nitride nanotube-based composite cylindrical micropanel embedded in an elastic medium subjected to electric potential via modified strain gradient theory

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