scholarly journals Mechanical Characterisation of Single-Walled Carbon Nanotube Heterojunctions: Numerical Simulation Study

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5100
Author(s):  
André F. G. Pereira ◽  
Jorge M. Antunes ◽  
José V. Fernandes ◽  
Nataliya Sakharova
Keyword(s):  
Carbon Nanotube ◽  
Elastic Properties ◽  
Three Dimensional ◽  
Element Model ◽  
Elastic Behaviour ◽  
Geometrical Parameters ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Wide Range ◽  
Three Dimensional Finite Element

The elastic properties of single-walled carbon nanotube heterojunctions were investigated using conventional tensile, bending and torsion tests. A three-dimensional finite element model was built in order to describe the elastic behaviour of cone heterojunctions (armchair–armchair and zigzag–zigzag). This comprehensive systematic study, to evaluate the tensile, bending and torsional rigidities of heterojunctions, enabled the formulation analytical methods for easy assessment of the elastic properties of heterojunctions using a wide range of their geometrical parameters.

Numerical Simulation of the Mechanical Behaviour of Single-Walled Carbon Nanotube Heterojunctions

2016 ◽  
Vol 38 ◽  
pp. 73-87 ◽  
Author(s):  
Nataliya A. Sakharova ◽  
André F.G. Pereira ◽  
Jorge M. Antunes ◽  
José Valdemar Fernandes
Keyword(s):  
Carbon Nanotube ◽  
Mechanical Behaviour ◽  
Torsional Rigidity ◽  
Three Dimensional ◽  
Element Model ◽  
Elastic Behaviour ◽  
Bending Rigidity ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Three Dimensional Finite Element

The study of the mechanical behaviour of single-walled carbon nanotube heterojunctions has been carried out, implementing nanoscale continuum approach. A three-dimensional finite element model is used in order to evaluate the elastic behaviour of cone heterojunctions. It is shown that the bending rigidity of heterojunctions is sensitive to bending conditions. The torsional rigidity does not depend on torsion conditions. Both rigidities of the heterojunction are compared with those of the thinner and thicker constituent nanotubes.

scholarly journals On the Determination of Elastic Properties of Single-Walled Boron Nitride Nanotubes by Numerical Simulation

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3183
Author(s):  
Nataliya A. Sakharova ◽  
Jorge M. Antunes ◽  
André F. G. Pereira ◽  
Bruno M. Chaparro ◽  
José V. Fernandes
Keyword(s):  
Numerical Simulation ◽  
Boron Nitride ◽  
Elastic Properties ◽  
Three Dimensional ◽  
Element Model ◽  
Extensive Study ◽  
Boron Nitride Nanotubes ◽  
Wide Range ◽  
Three Dimensional Finite Element ◽  
The Impact

The elastic properties of chiral and non-chiral single-walled boron nitride nanotubes in a wide range of their chiral indices and diameters were studied. With this aim, a three-dimensional finite element model was used to assess their rigidities and, subsequently, elastic moduli and Poisson’s ratio. An extensive study was performed to understand the impact of the input parameters on the results obtained by numerical simulation. For comparison, the elastic properties of single-walled boron nitride nanotubes are shown together with those obtained for single-walled carbon nanotubes.

Fabrication of Three-Dimensional Single-Walled Carbon Nanotube Networks Suspended on Si Pillar Architecture

2017 ◽  
Vol 17 (8) ◽  
pp. 5900-5902
Author(s):  
Jongtaek Lee ◽  
Junyoung Lee ◽  
Jonghee Yang ◽  
Taehun Park ◽  
Sang Jung Ahn ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Three Dimensional ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Carbon Nanotube Networks

Dependence of the Elastic Properties of a Single-Walled Carbon Nanotube on its Chirality

2018 ◽  
Vol 284 ◽  
pp. 20-24
Author(s):  
E.S. Sergeeva
Keyword(s):  
Carbon Nanotube ◽  
Elastic Properties ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Extreme Loads ◽  
Structure Sensitive ◽  
Different Types ◽  
Walled Carbon Nanotubes ◽  
Elastic Characteristics

Currently, composite materials composed of a matrix and reinforcing components are widely used as a structural material for various engineering devices designed to operate under extreme loads of different types. By modifying a composite with structure-sensitive inclusions, such as a single-wall carbon nanotube, the mechanical properties, especially elastic characteristics, of the resulting material can be significantly improved. The results of investigation of a single-walled carbon nanotubes chirality influence on its elastic properties are presented. Various configurations of nanotubes, such as zigzag and armchair are considered. The dependences of the nanotube bulk modulus and shear modulus of its diameter are shown.

Study of arching behaviour and strength of concrete masonry infills under out-of-plane loading

2019 ◽  
Vol 46 (10) ◽  
pp. 896-908 ◽  
Author(s):  
Ehsan Nasiri ◽  
Yi Liu
Keyword(s):  
Numerical Study ◽  
Three Dimensional ◽  
Element Model ◽  
Contributing Factors ◽  
Concrete Frames ◽  
Masonry Infills ◽  
Concrete Masonry ◽  
Wide Range ◽  
Out Of Plane ◽  
Three Dimensional Finite Element

A numerical study using a three-dimensional finite element model was conducted to investigate the arching behaviour and strength of concrete masonry infills bounded by reinforced concrete frames subjected to out-of-plane loading. Physical specimens were concurrently tested to provide results for validation of the model as well as evidence of directional characteristics of arching behaviour of masonry infills. A subsequent parametric study using the model included a wide range of infilled frame geometric properties. The results showed in detail the difference in one-way and two-way arching in terms of both strength and failure mechanism, and the contributing factors to this difference. Evaluation of the two main design equations for out-of-plane strength of masonry infills led to proposal of modifications to provide a more rational consideration of directional behaviour of concrete masonry infills. A comparison study using the available test results showed a marked improvement of strength prediction based on the proposed modification.

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