Finite element analysis of buckling of composite-stiffened panels

Buckling of laminated composite plates can be improved by introducing stiffeners to the plate. Majority of the researches concentrate on the buckling response of unstiffened and stiffened panels subjected to in-plane compressive loadings. Some contributions in the form of design charts and guideline...

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Main Author:	Zaighami, Arash
Format:	Thesis
Language:	English
Published:	2014
Subjects:	Plates (Engineering) - Research
Online Access:	http://psasir.upm.edu.my/id/eprint/64707/1/FK%202014%20137IR.pdf
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id	my-upm-ir.64707
record_format	uketd_dc
spelling	my-upm-ir.647072018-07-25T03:21:49Z Finite element analysis of buckling of composite-stiffened panels 2014-11 Zaighami, Arash Buckling of laminated composite plates can be improved by introducing stiffeners to the plate. Majority of the researches concentrate on the buckling response of unstiffened and stiffened panels subjected to in-plane compressive loadings. Some contributions in the form of design charts and guidelines have been developed for unstiffened panels subjected to in-plane compression and shear loadings, but still there is a relative lack of investigation into this area of research. This study considers the effects of radius of the fillet of stiffener-and-plate joint under compression loading and to investigate the effects of stiffener depth and pitch length under combined in-plane compression and shear loading using Finite Element Method (FEM). In total, 46 panels were modeled using ABAQUS software. In the first study, the effects of a filleted joint on the local and global buckling loads of the panels were investigated. The results show that increasing the radius of the fillet results in an increase in the buckling load. It had been found that 2.18% and 43.7% stability improvements are obtained for the panel with a 5-mm fillet radius in the global and local buckling, respectively. In the next study, the effects of the stiffener pitch length under combined compression and shear loading on the buckling of the panels with various plate aspect ratios were investigated numerically. The results indicate that increasing the number of stiffeners (reducing stiffener pitch length) results in an increase in the buckling load. In the last study, the effects of the height of the stiffener (stiffener depth) on the stability of the panels with different plate aspect ratios were investigated. The results show that increasing the height of the stiffeners results in the improvement of the stability of the panels. Although the improvement is significant in the panels with shorter stiffeners, this value is not noticeable after a certain value of stiffener depth. Plates (Engineering) - Research 2014-11 Thesis http://psasir.upm.edu.my/id/eprint/64707/ http://psasir.upm.edu.my/id/eprint/64707/1/FK%202014%20137IR.pdf text en public masters Universiti Putra Malaysia Plates (Engineering) - Research
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
topic	Plates (Engineering) - Research
spellingShingle	Plates (Engineering) - Research Zaighami, Arash Finite element analysis of buckling of composite-stiffened panels
description	Buckling of laminated composite plates can be improved by introducing stiffeners to the plate. Majority of the researches concentrate on the buckling response of unstiffened and stiffened panels subjected to in-plane compressive loadings. Some contributions in the form of design charts and guidelines have been developed for unstiffened panels subjected to in-plane compression and shear loadings, but still there is a relative lack of investigation into this area of research. This study considers the effects of radius of the fillet of stiffener-and-plate joint under compression loading and to investigate the effects of stiffener depth and pitch length under combined in-plane compression and shear loading using Finite Element Method (FEM). In total, 46 panels were modeled using ABAQUS software. In the first study, the effects of a filleted joint on the local and global buckling loads of the panels were investigated. The results show that increasing the radius of the fillet results in an increase in the buckling load. It had been found that 2.18% and 43.7% stability improvements are obtained for the panel with a 5-mm fillet radius in the global and local buckling, respectively. In the next study, the effects of the stiffener pitch length under combined compression and shear loading on the buckling of the panels with various plate aspect ratios were investigated numerically. The results indicate that increasing the number of stiffeners (reducing stiffener pitch length) results in an increase in the buckling load. In the last study, the effects of the height of the stiffener (stiffener depth) on the stability of the panels with different plate aspect ratios were investigated. The results show that increasing the height of the stiffeners results in the improvement of the stability of the panels. Although the improvement is significant in the panels with shorter stiffeners, this value is not noticeable after a certain value of stiffener depth.
format	Thesis
qualification_level	Master's degree
author	Zaighami, Arash
author_facet	Zaighami, Arash
author_sort	Zaighami, Arash
title	Finite element analysis of buckling of composite-stiffened panels
title_short	Finite element analysis of buckling of composite-stiffened panels
title_full	Finite element analysis of buckling of composite-stiffened panels
title_fullStr	Finite element analysis of buckling of composite-stiffened panels
title_full_unstemmed	Finite element analysis of buckling of composite-stiffened panels
title_sort	finite element analysis of buckling of composite-stiffened panels
granting_institution	Universiti Putra Malaysia
publishDate	2014
url	http://psasir.upm.edu.my/id/eprint/64707/1/FK%202014%20137IR.pdf
_version_	1747812301577125888

Finite element analysis of buckling of composite-stiffened panels

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