Journal ArticleDOI
Vibration damping characteristics of carbon nanotubes-based thin hybrid composite spherical shell structures
TLDR
In this article, an eight-noded shell element, which considers stress resultant-type Koiter's shell theory and transverse shear effect as per Mindlin's hypothesis having five degrees of freedom at each node, has been utilized for discretizing and analysis of such hybrid shell structures.Abstract:
The present work deals with the evaluation of elastic properties and dynamic analyses of thin hybrid composite shell structures, which consist of conventional carbon fiber as the reinforcing phase and multiwalled carbon nanotubes-based polymer as the matrix phase. The Mori-Tanaka and strength of material method has been implemented to determine the elastic properties of such hybrid composite structures without and with considering agglomerations. An eight-noded shell element, which considers stress resultant-type Koiter's shell theory and transverse shear effect as per Mindlin's hypothesis having five degrees of freedom at each node, has been utilized for discretizing and analysis of such hybrid shell structures. The Rayleigh damping model has been implemented in order to study the effect of carbon nanotubes (CNTs) on damping capacity of such hybrid composite shell structures. Different types of spherical shell panels have been analyzed in order to study the time and frequency responses. Results s...read more
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Journal ArticleDOI
Different Methods of Dispersing Carbon Nanotubes in Epoxy Resin and Initial Evaluation of the Obtained Nanocomposite as a Matrix of Carbon Fiber Reinforced Laminate in Terms of Vibroacoustic Performance and Flammability.
Giuseppina Barra,Liberata Guadagno,Luigi Vertuccio,Bartolomé M. Simonet,Bricio Santos,Mauro Zarrelli,Maurizio Arena,Massimo Viscardi +7 more
TL;DR: Different industrial mixing methods and some of their combinations were investigated for incorporating multi-walled carbon nanotubes into a resin based on an aeronautical epoxy precursor cured with diaminodiphenylsulfone (DDS), demonstrating an improved efficiency with reference to a standard CFRP equivalent panel.
Journal ArticleDOI
Multi-functional nanotechnology integration for aeronautical structures performance enhancement
TL;DR: This work highlights that the addition of carbon nanotubes strongly improves the mechanical properties with a simultaneous slight enhancement in the damping performance, and suggests that reinforcing a sample positively affects the samples properties since they, de facto, improve the global structural performance.
Journal ArticleDOI
Synchronous improvement of loss factors and storage modulus of structural damping composite with functionalized polyamide nonwoven fabrics
TL;DR: In this article, composites with polyamide nonwoven fabrics (PNF) and functionalized PNF with crystalline thermoplastic polymer polyvinylidene fluoride (PVDF) and nanoscale carbon material vapor grown carbon fiber (VGCF) as interleaf materials are prepared firstly, then dynamic mechanical behaviors are measured and the microstructure is analyzed to study the effect of different interlayers on the mechanical and damping properties of the co-cured composites.
Journal ArticleDOI
The coupled vibration characteristics of a spinning and axially moving composite thin-walled beam
TL;DR: In this paper, the coupled vibration characteristics of a spinning and axially moving composite thin-walled beam are analyzed using Galerkin's method to solve the Hamilton's principle.
Journal ArticleDOI
Viscoelastic modeling and vibration damping characteristics of hybrid CNTs-CFRP composite shell structures
Ashirbad Swain,Tarapada Roy +1 more
TL;DR: In this article, an eight-noded shell element with five degrees of freedom per node has been formulated to study the vibration damping characteristics of spherical shell structures made by CNTs-CFRP composite materials.
References
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