Investigation of the mechanical properties of carbon nanotubes, under the influence of imperfections

A carbon nanotube is a hollow cylinder, which is made of carbon atoms in the hexagonal lattice, which is made by rolling up the grahene sheet in the specific chiral vector direction. This cylindrical structure has outstanding mechanical, electrical thermal properties. Several attempts have been done...

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Main Author: Dehghan, Mohammad Mahdi Pir
Format: Thesis
Language:English
Published: 2014
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Online Access:http://eprints.utm.my/id/eprint/78270/1/MohammadMahdiDehghanMFKM20141.pdf
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spelling my-utm-ep.782702018-08-03T08:47:07Z Investigation of the mechanical properties of carbon nanotubes, under the influence of imperfections 2014-01 Dehghan, Mohammad Mahdi Pir TJ Mechanical engineering and machinery A carbon nanotube is a hollow cylinder, which is made of carbon atoms in the hexagonal lattice, which is made by rolling up the grahene sheet in the specific chiral vector direction. This cylindrical structure has outstanding mechanical, electrical thermal properties. Several attempts have been done to obtain the mechanical properties of CNTs in terms of Young’s modulus, shear modulus, tensile strength etc. The finite element method has been used to obtain the Young’s modulus of variety SWCNTs in this study. Furthermore, the imperfection (carbon vacancy) in the structure of SWCNT has been investigated on these models. Imperfection is one of the issues occurred in the producing of carbon structures such as graphene and carbon nanotubes and has a huge influence on mechanical properties of CNTs. This study consists of 68 different carbon nanotube models in three different types that are zigzag models from (3, 0) to (17, 0), armchairs from (2, 2) to (10, 10) and chiral models between (2, 2) and (10, 10). The imperfection percentages that investigated in this study are 5%, 10% and 15%. The results show that all models lose 34%, 56% and 90% of their tensile strength when they lost 5%, 10% and 15% of their carbon atoms from their structures (imperfection). 2014-01 Thesis http://eprints.utm.my/id/eprint/78270/ http://eprints.utm.my/id/eprint/78270/1/MohammadMahdiDehghanMFKM20141.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:81683 masters Universiti Teknologi Malaysia, Faculty of Mechanical Engineering Faculty of Mechanical Engineering
institution Universiti Teknologi Malaysia
collection UTM Institutional Repository
language English
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Dehghan, Mohammad Mahdi Pir
Investigation of the mechanical properties of carbon nanotubes, under the influence of imperfections
description A carbon nanotube is a hollow cylinder, which is made of carbon atoms in the hexagonal lattice, which is made by rolling up the grahene sheet in the specific chiral vector direction. This cylindrical structure has outstanding mechanical, electrical thermal properties. Several attempts have been done to obtain the mechanical properties of CNTs in terms of Young’s modulus, shear modulus, tensile strength etc. The finite element method has been used to obtain the Young’s modulus of variety SWCNTs in this study. Furthermore, the imperfection (carbon vacancy) in the structure of SWCNT has been investigated on these models. Imperfection is one of the issues occurred in the producing of carbon structures such as graphene and carbon nanotubes and has a huge influence on mechanical properties of CNTs. This study consists of 68 different carbon nanotube models in three different types that are zigzag models from (3, 0) to (17, 0), armchairs from (2, 2) to (10, 10) and chiral models between (2, 2) and (10, 10). The imperfection percentages that investigated in this study are 5%, 10% and 15%. The results show that all models lose 34%, 56% and 90% of their tensile strength when they lost 5%, 10% and 15% of their carbon atoms from their structures (imperfection).
format Thesis
qualification_level Master's degree
author Dehghan, Mohammad Mahdi Pir
author_facet Dehghan, Mohammad Mahdi Pir
author_sort Dehghan, Mohammad Mahdi Pir
title Investigation of the mechanical properties of carbon nanotubes, under the influence of imperfections
title_short Investigation of the mechanical properties of carbon nanotubes, under the influence of imperfections
title_full Investigation of the mechanical properties of carbon nanotubes, under the influence of imperfections
title_fullStr Investigation of the mechanical properties of carbon nanotubes, under the influence of imperfections
title_full_unstemmed Investigation of the mechanical properties of carbon nanotubes, under the influence of imperfections
title_sort investigation of the mechanical properties of carbon nanotubes, under the influence of imperfections
granting_institution Universiti Teknologi Malaysia, Faculty of Mechanical Engineering
granting_department Faculty of Mechanical Engineering
publishDate 2014
url http://eprints.utm.my/id/eprint/78270/1/MohammadMahdiDehghanMFKM20141.pdf
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