Finite element modeling of composite plates with total imperfect interface subjected to impact loading

This project report is devoted to the modeling of the impact behavior of laminated composite plates, with a special emphasis on incorporating interfacial imperfection. In most analytical and numerical works on composite materials, a perfect interface between adjacent laminae is assumed which implies...

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Main Author:	Ibrahim, Mohamud Abdirahman
Format:	Thesis
Language:	English
Published:	2013
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/41846/5/MohamudAbdirahmanIbrahimMFKA2013.pdf
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id	my-utm-ep.41846
record_format	uketd_dc
spelling	my-utm-ep.418462017-07-16T04:25:24Z Finite element modeling of composite plates with total imperfect interface subjected to impact loading 2013-06 Ibrahim, Mohamud Abdirahman TA Engineering (General). Civil engineering (General) This project report is devoted to the modeling of the impact behavior of laminated composite plates, with a special emphasis on incorporating interfacial imperfection. In most analytical and numerical works on composite materials, a perfect interface between adjacent laminae is assumed which implies continuous displacements and tractions across laminate. In many cases of practical interest, however, the assumption of a perfect interface is inadequate. This project report aims at the finite element formulation for the effects of different imperfect bonding intensities on the response of a laminated plate subjected to a transverse low velocity impact using MATLAB. In this study, the imperfect bonding is incorporated into the formulation by introducing an imperfection factor, R, to the interface stiffness modeled using a well-defined virtually zero-thickness interface element. The kinemati cally consistent mass formulation is used to formulate the mass matrix and the impact force is evaluated using a simple linear model. New mark beta method, an implicit method of direct integration, is used in the present study for the solution of the linear transient response of the plate. From analysis, it is found that the fundamental non dimesional frequency, absorbed energy and the central deflection increase with an increase in imperfection factor. Besides, the orientation of laminae is also observed to affect the impact behavior of the laminated composite plate. 2013-06 Thesis http://eprints.utm.my/id/eprint/41846/ http://eprints.utm.my/id/eprint/41846/5/MohamudAbdirahmanIbrahimMFKA2013.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Civil Engineering Faculty of Civil Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Ibrahim, Mohamud Abdirahman Finite element modeling of composite plates with total imperfect interface subjected to impact loading
description	This project report is devoted to the modeling of the impact behavior of laminated composite plates, with a special emphasis on incorporating interfacial imperfection. In most analytical and numerical works on composite materials, a perfect interface between adjacent laminae is assumed which implies continuous displacements and tractions across laminate. In many cases of practical interest, however, the assumption of a perfect interface is inadequate. This project report aims at the finite element formulation for the effects of different imperfect bonding intensities on the response of a laminated plate subjected to a transverse low velocity impact using MATLAB. In this study, the imperfect bonding is incorporated into the formulation by introducing an imperfection factor, R, to the interface stiffness modeled using a well-defined virtually zero-thickness interface element. The kinemati cally consistent mass formulation is used to formulate the mass matrix and the impact force is evaluated using a simple linear model. New mark beta method, an implicit method of direct integration, is used in the present study for the solution of the linear transient response of the plate. From analysis, it is found that the fundamental non dimesional frequency, absorbed energy and the central deflection increase with an increase in imperfection factor. Besides, the orientation of laminae is also observed to affect the impact behavior of the laminated composite plate.
format	Thesis
qualification_level	Master's degree
author	Ibrahim, Mohamud Abdirahman
author_facet	Ibrahim, Mohamud Abdirahman
author_sort	Ibrahim, Mohamud Abdirahman
title	Finite element modeling of composite plates with total imperfect interface subjected to impact loading
title_short	Finite element modeling of composite plates with total imperfect interface subjected to impact loading
title_full	Finite element modeling of composite plates with total imperfect interface subjected to impact loading
title_fullStr	Finite element modeling of composite plates with total imperfect interface subjected to impact loading
title_full_unstemmed	Finite element modeling of composite plates with total imperfect interface subjected to impact loading
title_sort	finite element modeling of composite plates with total imperfect interface subjected to impact loading
granting_institution	Universiti Teknologi Malaysia, Faculty of Civil Engineering
granting_department	Faculty of Civil Engineering
publishDate	2013
url	http://eprints.utm.my/id/eprint/41846/5/MohamudAbdirahmanIbrahimMFKA2013.pdf
_version_	1747816631046766592

Finite element modeling of composite plates with total imperfect interface subjected to impact loading

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