Finite element modeling of laminated composite plates with locally delaminated interface subjected to impact loading

This project report presents the finite element formulation for the investigation of the effects of interface imperfection on the impact behavior of a laminated composite plate. The interface condition between the laminas plays a very important role in the determination of the behavior of the compos...

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Main Author:	Abo Sabah, Saddam Hussein Ali
Format:	Thesis
Language:	English
Published:	2013
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/41634/5/SaddamHusseinAliMFKA2013.pdf
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id	my-utm-ep.41634
record_format	uketd_dc
spelling	my-utm-ep.416342017-07-11T01:07:58Z Finite element modeling of laminated composite plates with locally delaminated interface subjected to impact loading 2013-06 Abo Sabah, Saddam Hussein Ali TA Engineering (General). Civil engineering (General) This project report presents the finite element formulation for the investigation of the effects of interface imperfection on the impact behavior of a laminated composite plate. The interface condition between the laminas plays a very important role in the determination of the behavior of the composite laminates. If the bonding is imperfect, it has high possibility to delaminate progressively. Most of the previous studies on laminated composites were carried out adopting the assumption that the laminas are perfectly bonded. However, the existence of a perfect interfacial bond in a real laminated composite seems to be impossible. Therefore, this study aims to investigate the effect of localized interface imperfection on the behavior of a laminated composite plate when subjected to low velocity impact loading for various fiber orientations. A thin, flat, rectangular laminated plate with two layers of Eglass/ Epoxy transversely isotropic lamina and an orthotropic interface layer between them are considered in this study. The interface is modeled as a layer of zero thickness and zero mass, and the imperfection factor is applied locally to the interface. By using MATLAB, the stiffness matrix, mass matrix, and the impact force vector are formulated and programmed in order to obtain the deformation of the plate. The results show that as the separation of fiber orientation between the two laminas increases, both central deflection and energy absorption increase. The increase of delamination area leads to plate’s damage due to the increase in the absorbed energy, resulting in higher deformation. 2013-06 Thesis http://eprints.utm.my/id/eprint/41634/ http://eprints.utm.my/id/eprint/41634/5/SaddamHusseinAliMFKA2013.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) Abo Sabah, Saddam Hussein Ali Finite element modeling of laminated composite plates with locally delaminated interface subjected to impact loading
description	This project report presents the finite element formulation for the investigation of the effects of interface imperfection on the impact behavior of a laminated composite plate. The interface condition between the laminas plays a very important role in the determination of the behavior of the composite laminates. If the bonding is imperfect, it has high possibility to delaminate progressively. Most of the previous studies on laminated composites were carried out adopting the assumption that the laminas are perfectly bonded. However, the existence of a perfect interfacial bond in a real laminated composite seems to be impossible. Therefore, this study aims to investigate the effect of localized interface imperfection on the behavior of a laminated composite plate when subjected to low velocity impact loading for various fiber orientations. A thin, flat, rectangular laminated plate with two layers of Eglass/ Epoxy transversely isotropic lamina and an orthotropic interface layer between them are considered in this study. The interface is modeled as a layer of zero thickness and zero mass, and the imperfection factor is applied locally to the interface. By using MATLAB, the stiffness matrix, mass matrix, and the impact force vector are formulated and programmed in order to obtain the deformation of the plate. The results show that as the separation of fiber orientation between the two laminas increases, both central deflection and energy absorption increase. The increase of delamination area leads to plate’s damage due to the increase in the absorbed energy, resulting in higher deformation.
format	Thesis
qualification_level	Master's degree
author	Abo Sabah, Saddam Hussein Ali
author_facet	Abo Sabah, Saddam Hussein Ali
author_sort	Abo Sabah, Saddam Hussein Ali
title	Finite element modeling of laminated composite plates with locally delaminated interface subjected to impact loading
title_short	Finite element modeling of laminated composite plates with locally delaminated interface subjected to impact loading
title_full	Finite element modeling of laminated composite plates with locally delaminated interface subjected to impact loading
title_fullStr	Finite element modeling of laminated composite plates with locally delaminated interface subjected to impact loading
title_full_unstemmed	Finite element modeling of laminated composite plates with locally delaminated interface subjected to impact loading
title_sort	finite element modeling of laminated composite plates with locally delaminated 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/41634/5/SaddamHusseinAliMFKA2013.pdf
_version_	1747816586341777408

Finite element modeling of laminated composite plates with locally delaminated interface subjected to impact loading

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