Laser machining of glass fibre reinforced plastics (GFRP)

Glass fibre reinforced plastics (GFRP) composite materials are in increasingly high demand, particularly in marine industries for reduced weight. This is due to their superior structural characteristics (in fatigue and static conditions) as well as light weight. Anisotropic and heterogeneous feature...

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Main Author:	Kolandaisamy, Robert Milkey
Format:	Thesis
Language:	English English
Published:	2014
Subjects:	T Technology (General)
Online Access:	http://eprints.utem.edu.my/id/eprint/16813/1/Laser%20Machining%20Of%20Glass%20Fibre%20Reinforced%20Plastics%20%28GFRP%29.pdf http://eprints.utem.edu.my/id/eprint/16813/2/Laser%20machining%20of%20glass%20fibre%20reinforced%20plastics%20%28GFRP%29.pdf
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spelling	my-utem-ep.168132022-06-07T10:52:08Z Laser machining of glass fibre reinforced plastics (GFRP) 2014 Kolandaisamy, Robert Milkey T Technology (General) TA Engineering (General). Civil engineering (General) Glass fibre reinforced plastics (GFRP) composite materials are in increasingly high demand, particularly in marine industries for reduced weight. This is due to their superior structural characteristics (in fatigue and static conditions) as well as light weight. Anisotropic and heterogeneous features of these materials, however, have posed serious challenges in machining of GFRP. Hence, a new machining technology needs to be investigated. Laser is a non-contact process which is identified as being satisfactory for this research project. A major quality challenge in terms of the laser cutting quality of these materials includes dimensional accuracy. Various laser parameters and cutting techniques are investigated in this study to minimise these defects. In order to improve the cutting quality and dimensional accuracy, design parameters and responses were correlated, modelled, analysed, optimized and experimentally validated to meet the requirements of marine engineering sponsored industry. The objective of this research work is to study the different aspects of GFRP composite cutting using CO2 laser and to establish the relationship between the kerf width, taper and roundness with the process parameters like laser power, cutting speed, gas pressure, frequency and duty cycle. The experimental plans were conducted according to the design of experiment (DOE) to accommodate a full range of experimental analysis. Identification of the important parameter effects presented using analysis of variance (ANOVA) technique combined with graphical representation provides a clearer picture of the whole laser profiling phenomenon. The results show that, the interaction between lower level laser power (2600 Watt), higher level cutting speed (1200 mm/min), higher level gas pressure (8 Bar), medium level frequency (1825 Hz) and medium level duty cycle (96 %) gives better cutting performance towards three responses. Finally, the predictive mathematical model that was established to predict the responses were also validated and are found to be promising in resolving the cut quality issues of industrial GFRP laminates with the error value 16.12 % for kerf width, 18.60 % for taper and 16.28 % for roundness. It was demonstrated that, the response surface methodology (RSM) has played a valuable role to identify the interaction factors of design parameters in attaining industrial desired cut quality response. 2014 Thesis http://eprints.utem.edu.my/id/eprint/16813/ http://eprints.utem.edu.my/id/eprint/16813/1/Laser%20Machining%20Of%20Glass%20Fibre%20Reinforced%20Plastics%20%28GFRP%29.pdf text en public http://eprints.utem.edu.my/id/eprint/16813/2/Laser%20machining%20of%20glass%20fibre%20reinforced%20plastics%20%28GFRP%29.pdf text en validuser https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=96143 mphil masters Universiti Teknikal Malaysia Melaka Faculty Of Manufacturing Engineering Subramonian, Sivarao Samsudin, Abdul Rahim
institution	Universiti Teknikal Malaysia Melaka
collection	UTeM Repository
language	English English
advisor	Subramonian, Sivarao Samsudin, Abdul Rahim
topic	T Technology (General) T Technology (General)
spellingShingle	T Technology (General) T Technology (General) Kolandaisamy, Robert Milkey Laser machining of glass fibre reinforced plastics (GFRP)
description	Glass fibre reinforced plastics (GFRP) composite materials are in increasingly high demand, particularly in marine industries for reduced weight. This is due to their superior structural characteristics (in fatigue and static conditions) as well as light weight. Anisotropic and heterogeneous features of these materials, however, have posed serious challenges in machining of GFRP. Hence, a new machining technology needs to be investigated. Laser is a non-contact process which is identified as being satisfactory for this research project. A major quality challenge in terms of the laser cutting quality of these materials includes dimensional accuracy. Various laser parameters and cutting techniques are investigated in this study to minimise these defects. In order to improve the cutting quality and dimensional accuracy, design parameters and responses were correlated, modelled, analysed, optimized and experimentally validated to meet the requirements of marine engineering sponsored industry. The objective of this research work is to study the different aspects of GFRP composite cutting using CO2 laser and to establish the relationship between the kerf width, taper and roundness with the process parameters like laser power, cutting speed, gas pressure, frequency and duty cycle. The experimental plans were conducted according to the design of experiment (DOE) to accommodate a full range of experimental analysis. Identification of the important parameter effects presented using analysis of variance (ANOVA) technique combined with graphical representation provides a clearer picture of the whole laser profiling phenomenon. The results show that, the interaction between lower level laser power (2600 Watt), higher level cutting speed (1200 mm/min), higher level gas pressure (8 Bar), medium level frequency (1825 Hz) and medium level duty cycle (96 %) gives better cutting performance towards three responses. Finally, the predictive mathematical model that was established to predict the responses were also validated and are found to be promising in resolving the cut quality issues of industrial GFRP laminates with the error value 16.12 % for kerf width, 18.60 % for taper and 16.28 % for roundness. It was demonstrated that, the response surface methodology (RSM) has played a valuable role to identify the interaction factors of design parameters in attaining industrial desired cut quality response.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Kolandaisamy, Robert Milkey
author_facet	Kolandaisamy, Robert Milkey
author_sort	Kolandaisamy, Robert Milkey
title	Laser machining of glass fibre reinforced plastics (GFRP)
title_short	Laser machining of glass fibre reinforced plastics (GFRP)
title_full	Laser machining of glass fibre reinforced plastics (GFRP)
title_fullStr	Laser machining of glass fibre reinforced plastics (GFRP)
title_full_unstemmed	Laser machining of glass fibre reinforced plastics (GFRP)
title_sort	laser machining of glass fibre reinforced plastics (gfrp)
granting_institution	Universiti Teknikal Malaysia Melaka
granting_department	Faculty Of Manufacturing Engineering
publishDate	2014
url	http://eprints.utem.edu.my/id/eprint/16813/1/Laser%20Machining%20Of%20Glass%20Fibre%20Reinforced%20Plastics%20%28GFRP%29.pdf http://eprints.utem.edu.my/id/eprint/16813/2/Laser%20machining%20of%20glass%20fibre%20reinforced%20plastics%20%28GFRP%29.pdf
_version_	1747833894552469504

Laser machining of glass fibre reinforced plastics (GFRP)

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