Crack-inclusion interaction in composite materials with aerospace and offshore engineering application

With the advancement in material technology, the use fiber reinforced composite materials have gained wide recognition and are currently utilized for various application. Example of such applications are in aerospace and offshore industry. This report aimed to explore the uses of composite material...

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Main Author: Koh, Way Keat
Other Authors: Xiao Zhongmin
Format: Final Year Project
Language:English
Published: 2018
Subjects:
Online Access:http://hdl.handle.net/10356/73076
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-730762023-03-04T18:59:55Z Crack-inclusion interaction in composite materials with aerospace and offshore engineering application Koh, Way Keat Xiao Zhongmin School of Mechanical and Aerospace Engineering DRNTU::Engineering::Mechanical engineering::Mechanics and dynamics With the advancement in material technology, the use fiber reinforced composite materials have gained wide recognition and are currently utilized for various application. Example of such applications are in aerospace and offshore industry. This report aimed to explore the uses of composite material in these two applications and also to study the fracture mechanics of these complex material. Numerical method was used to acquire the stress intensity factor (SIF) of various model of crack near a circular inclusion by means of finite element software. Stress intensity factor data were collected by perturbing the crack with a uniform load. Parametric approach was used with different crack models to obtain various results of stress intensity factor. This was able to be achieved by introducing certain constant variables and a few sets of manipulating variables. Two types of crack were being modeled and analyzed, which were a straight crack (with coated and uncoated inclusion) and a symmetrical branch crack at one end (with uncoated inclusion). The outcome of the numerical analysis suggested that the presence of reinforced fiber (inclusion) in a material was able to reduce the stress intensity factor. However, the case was only shown to be true when the inclusion has a higher Young’s modulus compared to the matrix material. With lower stress intensity factor, this results to a higher resistance towards crack propagation and ultimately material failure. Bachelor of Engineering (Mechanical Engineering) 2018-01-02T04:19:01Z 2018-01-02T04:19:01Z 2018 Final Year Project (FYP) http://hdl.handle.net/10356/73076 en Nanyang Technological University 76 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Mechanical engineering::Mechanics and dynamics
spellingShingle DRNTU::Engineering::Mechanical engineering::Mechanics and dynamics
Koh, Way Keat
Crack-inclusion interaction in composite materials with aerospace and offshore engineering application
description With the advancement in material technology, the use fiber reinforced composite materials have gained wide recognition and are currently utilized for various application. Example of such applications are in aerospace and offshore industry. This report aimed to explore the uses of composite material in these two applications and also to study the fracture mechanics of these complex material. Numerical method was used to acquire the stress intensity factor (SIF) of various model of crack near a circular inclusion by means of finite element software. Stress intensity factor data were collected by perturbing the crack with a uniform load. Parametric approach was used with different crack models to obtain various results of stress intensity factor. This was able to be achieved by introducing certain constant variables and a few sets of manipulating variables. Two types of crack were being modeled and analyzed, which were a straight crack (with coated and uncoated inclusion) and a symmetrical branch crack at one end (with uncoated inclusion). The outcome of the numerical analysis suggested that the presence of reinforced fiber (inclusion) in a material was able to reduce the stress intensity factor. However, the case was only shown to be true when the inclusion has a higher Young’s modulus compared to the matrix material. With lower stress intensity factor, this results to a higher resistance towards crack propagation and ultimately material failure.
author2 Xiao Zhongmin
author_facet Xiao Zhongmin
Koh, Way Keat
format Final Year Project
author Koh, Way Keat
author_sort Koh, Way Keat
title Crack-inclusion interaction in composite materials with aerospace and offshore engineering application
title_short Crack-inclusion interaction in composite materials with aerospace and offshore engineering application
title_full Crack-inclusion interaction in composite materials with aerospace and offshore engineering application
title_fullStr Crack-inclusion interaction in composite materials with aerospace and offshore engineering application
title_full_unstemmed Crack-inclusion interaction in composite materials with aerospace and offshore engineering application
title_sort crack-inclusion interaction in composite materials with aerospace and offshore engineering application
publishDate 2018
url http://hdl.handle.net/10356/73076
_version_ 1759858255373271040