Investigation of Through-Thickness Stresses in Composite Laminates Using Layerwise Theory

Sarvestani, Hamidreza Yazdani; Naghashpour, Ali

doi:10.1155/2013/676743

Cited by 4 publications

(3 citation statements)

References 30 publications

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“…Pursuing efforts on the localisation issue, Naghaspour et al [197][198][199][200][201] proposed the use of electric potential measurement (EPM). The authors mapped the whole surface of a CFEP with 0.3 wt % CNT in the matrix with electrodes and continuously measured the change of resistance between each pair of electrodes.…”

Section: Cnt Dispersed In a Matrix As A Sensing Elementmentioning

confidence: 99%

A Review of Nanocarbon-Based Solutions for the Structural Health Monitoring of Composite Parts Used in Renewable Energies

et al. 2022

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The growing demands for electrical energy, especially renewable, is boosting the development of wind turbines equipped with longer composite blades. To reduce the maintenance cost of such huge composite parts, the structural health monitoring (SHM) is an approach to anticipate and/or follow the structural behaviour along time. Apart from the development of traditional non-destructive testing methods, in order to reduce the use of intrusive instrumentation there is a growing interest for the development of “self-sensing materials”. An interesting route to achieve this, can be to introduce carbon nanofillers such as nanotubes (CNT) in the composite structures, which enables to create systems that are sensitive to both strain and damage. This review aims at updating the state of the art of this topic so far. A first overview of the existing SHM techniques for thermoset based wind turbine blades composites is presented. Then, the use of self-sensing materials for strain and damage sensing is presented. Different strategies are overviewed and discussed, from the design of conductive composites such as carbon fibres reinforced polymers, to the elaboration of conductive nano-reinforced polymer composites. The origins of sensing mechanisms along with the percolation theory applied to nanofillers dispersed in polymer matrices are also detailed.

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Section: Cnt Dispersed In a Matrix As A Sensing Elementmentioning

confidence: 99%

A Review of Nanocarbon-Based Solutions for the Structural Health Monitoring of Composite Parts Used in Renewable Energies

et al. 2022

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“…Many investigations on the development of analytical solutions were performed for composite structures, while no analytical solution has existed to analyze nanotube composite structures [7][8][9][10]. Among these, the theory of nonlocal continuum mechanics introduced by Eringen [11][12][13] has been extensively employed in nano-mechanics to monitor the nonlocal effects.…”

Section: Introductionmentioning

confidence: 99%

Analytical and numerical investigations on buckling behavior of nanotube structures

Sarvestani

Naghashpour

2015

Acta Mech

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One of the significant issues in the nanotube research community is buckling behavior. In the present work, the buckling of single-walled nanotubes (SWNTs), double-walled nanotubes (DWNTs) and multi-walled nanotubes (MWNTs) under axial compression is investigated. Buckling analysis for nanotube composite structures is performed by using layer-wise theory based on the nonlocal constitutive relations of Eringen. The governing equations of SWNTs, DWNTs and MWNTs are developed. Then analytical solutions are obtained using the state-space method. The effects of nanotube length, diameter and nonlocal parameter on the buckling loads are studied. The numerical results indicate that the nonlocal parameter is important for the buckling analysis of nanotube composite structures.

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“…The vast majority of structural theories are derived using the constitutive assumptions that the stress at a point depends only on the strain at that point. Many investigations were made on the development of analytical solutions to analyse the composite structures [3,4] while it remains to be observed whether these solutions can be applied to make analyses for nanostructures. Continuum based analyses have been generally utilized for the formulation of different nanostructures.…”

Section: Introductionmentioning

confidence: 99%

Nonlocal Theory to Analyse Nanotube Structures under Tension

Sarvestani

Naghashpour

2015

Journal of Nanomaterials

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Because nanocomposites have found augmented use in many industries, the analytical solutions are required to be developed. This paper presents the development of a new analytical method for studying nanotube structures under tension using layer-wise and Eringen theories. Two opposite ends of tubes are subjected to normal forces. Nonlocal governing differential equations are derived and presented. The theoretical developments determine the effect of the geometric and nonlocal constitutive relations for single-walled nanotubes (SWNTs), double-walled nanotubes (DWNTs), and multiwalled nanotubes (MWNTs) under tension loading. It is observed that all displacement components increase with the increase in the nonlocal parameter.

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Investigation of Through-Thickness Stresses in Composite Laminates Using Layerwise Theory

Cited by 4 publications

References 30 publications

A Review of Nanocarbon-Based Solutions for the Structural Health Monitoring of Composite Parts Used in Renewable Energies

A Review of Nanocarbon-Based Solutions for the Structural Health Monitoring of Composite Parts Used in Renewable Energies

Analytical and numerical investigations on buckling behavior of nanotube structures

Nonlocal Theory to Analyse Nanotube Structures under Tension

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