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
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://eprints.utm.my/id/eprint/78270/1/MohammadMahdiDehghanMFKM20141.pdf
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id	my-utm-ep.78270
record_format	uketd_dc
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
_version_	1747817948720922624

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

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