scholarly journals Numerical Simulations of Longitudinal Elastic Behavior of Single-Walled Carbon Nanotubes–Reinforced Polymer Nanocomposites

2014 ◽  
Vol 4 (2) ◽  
Author(s):  
James Han ◽  
Yu-Fu Ko ◽  
Hsien-Yang Yeh
Keyword(s):  
Carbon Nanotubes ◽  
Numerical Simulations ◽  
Polymer Nanocomposites ◽  
Single Walled Carbon Nanotubes ◽  
Elastic Behavior ◽  
Single Walled Carbon ◽  
Reinforced Polymer ◽  
Walled Carbon Nanotubes

Multiscale-Based Simulations of Longitudinal Mechanical Behaviors of Single-Walled Carbon Nanotubes Reinforced Polymer Nanocomposites

2013 ◽  
Author(s):  
James Han ◽  
Yu-Fu Ko ◽  
Hsien-Yang Yeh
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Mechanical Behavior ◽  
Polymer Nanocomposites ◽  
Polymer Matrix ◽  
Material Properties ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Reinforced Polymer ◽  
Walled Carbon Nanotubes

Longitudinal elastic mechanical behavior of the armchair and zigzag single-walled carbon nanotubes (SWCNTs) and the SWCNTs reinforced polymer nanocomposites are investigated. Finite element analysis (FEA) models of the SWCNTs and the SWCNTs reinforced polymer nanocomposites are developed utilizing multiscale modeling technique along with molecular structural mechanics (MSM), which provides material properties at molecular scale and establishes relations between the steric potential energy and the classic structural mechanics. Material properties of C-C bond were obtained using multiscale-based modeling method with the consideration of shear deformation. In addition, for the interphase layer interaction between the carbon molecules of SWCNTs and the molecules of polymer matrix, multiscale-based modeling method was utilized to obtain the stiffness of nonlinear spring elements representing the van der Waals interaction. It is observed that the mechanical behavior of the SWCNTs reinforced polymer nanocomposites is dictated by the mechanical behavior of the SWCNTs embedded in the polymer matrix. Furthermore, varying radius and length of the SWCNTs would affect the longitudinal elastic mechanical properties of the SWCNTs reinforced polymer nanocomposites. Specifically, the simulation results had demonstrated that longitudinal elastic mechanical properties of the SWCNTs reinforced polymer nanocomposites would vary due to different loading conditions applied, i.e., discrete and continuous loading conditions.

Flammability properties of polymer nanocomposites with single-walled carbon nanotubes: effects of nanotube dispersion and concentration

Polymer ◽  
2005 ◽  
Vol 46 (2) ◽  
pp. 471-481 ◽  
Author(s):  
Takashi Kashiwagi ◽  
Fangming Du ◽  
Karen I. Winey ◽  
Katrina M. Groth ◽  
John R. Shields ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Polymer Nanocomposites ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes ◽  
Nanotube Dispersion

Elastic Properties of Single-Walled Carbon Nanotubes in Axial and Transverse Directions: A First Principles Study

2005 ◽  
Author(s):  
X. Song ◽  
Q. Ge ◽  
S.-C. Yen
Keyword(s):  
Carbon Nanotubes ◽  
Elastic Properties ◽  
First Principles ◽  
Pure Shear ◽  
Small Deformation ◽  
Single Walled Carbon Nanotubes ◽  
Elastic Behavior ◽  
Plane Shear ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

A first principles approach has been employed to study the elastic properties of ten zigzag and seven armchair types of single-walled carbon nanotubes (SWNTs) with the diameter varied from 0.551 to 1.358 nm. The linear elastic behavior of the SWNTs when subject to small deformation is studied by four virtual mechanical experiments: uniaxial strain, uniaxial stress, in-plane pure shear, and in-plane bi-axial tension tests. Assuming that a SWNT be transversely isotropic, a strain energy approach is used to calculate the Young’s moduli in axial and transverse directions, major Posson’s ratio, plain strain bulk, and in-plane shear moduli of the carbon nanotubes. It is found that the elastic constants are insensitive to the tube size, but show a slight dependence upon the helicity. However, the differences in the elastic moduli between zigzag and armchair nanotubes are within 10%.

Augmentation of properties on sparingly loaded nanocomposites via functionalized single-walled carbon nanotubes using a covalent approach

RSC Advances ◽  
2014 ◽  
Vol 4 (108) ◽  
pp. 62947-62950 ◽  
Author(s):  
Adhigan Murali ◽  
Senthil A. Gurusamy-Thangavelu ◽  
Sellamuthu N. Jaisankar ◽  
Asit Baran Mandal
Keyword(s):  
Carbon Nanotubes ◽  
Polymer Nanocomposites ◽  
Single Walled Carbon Nanotubes ◽  
Transparent Film ◽  
Single Walled Carbon ◽  
Efficient Route ◽  
Walled Carbon Nanotubes ◽  
First Time

Polymer nanocomposites are developed, for the first time, as transparent film by covalent addition of [OH]n–SWCNTs with PU via an efficient route. PU nanocomposites, which were augmented, show enhanced mechanical, thermal and conductivity properties.

Self-aligned growth of single-walled carbon nanotubes using optical near-field effects

2008 ◽  
Vol 1142 ◽  
Author(s):  
Y.S. Zhou ◽  
W. Xiong ◽  
M. Mahjouri-Samani ◽  
W.Q. Yang ◽  
K.J. Yi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Numerical Simulations ◽  
Near Field ◽  
Single Walled Carbon Nanotubes ◽  
Metallic Electrode ◽  
Single Walled Carbon ◽  
Field Effects ◽  
Localized Heating ◽  
Aligned Growth ◽  
Walled Carbon Nanotubes

ABSTRACTBy applying optical near-field effects in a laser-assisted chemical vapor deposition (LCVD) process, self-aligned growth of ultra-short single-walled carbon nanotubes (SWNTs) was realized in a well controlled manner at a relatively low substrate temperature due to the nanoscale heating enhancement induced by the optical near-field effects. Bridge structures containing single suspending SWNT channels were successfully fabricated. Ultra-sharp tip-shaped metallic electrodes were used as optical antennas in localizing and enhancing the optical fields. Numerical simulations using High Frequency Structure Simulator (HFSS) reveal significant enhancement of electrical fields at the metallic electrode tips under laser irradiation, which induces localized heating at the tips. Numerical simulations were carried out to optimize SWNT growth conditions, such as electrode tip sharpness and film thickness, for maximal enhancement of electrical near field and localized heating.

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