An Investigation Of Energy Absorption Characteristics Of Honeycomb Structure Under Lateral Loading

Nowadays, aluminium honeycomb has become well-known as a good energy absorbing cellular structure. Due to its lightweight and high stiffness properties, this structure has been more preferable metallic material compared to others in term of producing an energy absorbing structure. This study is conc...

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Main Author:	Chuli, Abd Jumaidi
Format:	Thesis
Language:	English English
Published:	2019
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utem.edu.my/id/eprint/24661/1/An%20Investigation%20Of%20Energy%20Absorption%20Characteristics%20Of%20Honeycomb%20Structure%20Under%20Lateral%20Loading.pdf http://eprints.utem.edu.my/id/eprint/24661/2/An%20Investigation%20Of%20Energy%20Absorption%20Characteristics%20Of%20Honeycomb%20Structure%20Under%20Lateral%20Loading.pdf
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id	my-utem-ep.24661
record_format	uketd_dc
institution	Universiti Teknikal Malaysia Melaka
collection	UTeM Repository
language	English English
advisor	Ali, Mohd Basri
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Chuli, Abd Jumaidi An Investigation Of Energy Absorption Characteristics Of Honeycomb Structure Under Lateral Loading
description	Nowadays, aluminium honeycomb has become well-known as a good energy absorbing cellular structure. Due to its lightweight and high stiffness properties, this structure has been more preferable metallic material compared to others in term of producing an energy absorbing structure. This study is concerned with the energy absorption characteristics of aluminium honeycomb structure. For the crashworthiness of a material research area, this study offers more understanding of the behaviour of aluminium honeycomb when subjected to quasi-static and dynamic lateral compression. Five different densities of honeycomb structure (empty and Oil Palm Trunk-filled with different densities) were introduced to study their deformation mode as well as the energy absorption characteristic. Since lateral compression is involved, all specimens were compressed in two directions; x1-direction and x2-direction. The results show that the honeycomb cores exhibit anisotropic response during the compression. Under quasi-static and dynamic loading, honeycomb compressed in the x1- direction has higher energy absorption characteristics values such as collapse load, mean load, plateau load and energy absorption value compared to the honeycomb cores that were compressed in the x2-direction. This is due to the cell wall arrangement of double thickness wall (2t) in the honeycomb core; the 2t cell wall aligned vertically when compressed in x1- direction, and horizontally when compressed in the x2-direction. The vertically arranged 2t cell wall caused the honeycomb structure to be stronger and has a higher stiffness value. In term of deforming modes, all honeycombs show a very different response from each other. Besides, the addition of filler element material (Oil Palm Trunk sawdust) into the honeycomb core caused the energy absorption values to increase by 83% in x1-direction and 91% in the x2-direction. Since the honeycomb is a man-made structure, the imperfections are randomly distributed in all parts of the structure. This caused the initiation point for the deforming mode of the honeycomb which occurred at the weakest point in the structure to be started in a random manner. All experimental results were compared by using finite element software, and a good agreement between them was shown for the compression of empty honeycomb. The main factors that caused the dissimilarity between the experimental and simulation results were found to be the imperfections of the honeycomb cores; the irregularities of the cell wall and the geometrical imperfections of the honeycomb that occurred during the manufacturing process.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Chuli, Abd Jumaidi
author_facet	Chuli, Abd Jumaidi
author_sort	Chuli, Abd Jumaidi
title	An Investigation Of Energy Absorption Characteristics Of Honeycomb Structure Under Lateral Loading
title_short	An Investigation Of Energy Absorption Characteristics Of Honeycomb Structure Under Lateral Loading
title_full	An Investigation Of Energy Absorption Characteristics Of Honeycomb Structure Under Lateral Loading
title_fullStr	An Investigation Of Energy Absorption Characteristics Of Honeycomb Structure Under Lateral Loading
title_full_unstemmed	An Investigation Of Energy Absorption Characteristics Of Honeycomb Structure Under Lateral Loading
title_sort	investigation of energy absorption characteristics of honeycomb structure under lateral loading
granting_institution	Universiti Teknikal Malaysia Melaka
granting_department	Faculty of Mechanical Engineering
publishDate	2019
url	http://eprints.utem.edu.my/id/eprint/24661/1/An%20Investigation%20Of%20Energy%20Absorption%20Characteristics%20Of%20Honeycomb%20Structure%20Under%20Lateral%20Loading.pdf http://eprints.utem.edu.my/id/eprint/24661/2/An%20Investigation%20Of%20Energy%20Absorption%20Characteristics%20Of%20Honeycomb%20Structure%20Under%20Lateral%20Loading.pdf
_version_	1776103126104801280
spelling	my-utem-ep.246612023-05-25T16:03:28Z An Investigation Of Energy Absorption Characteristics Of Honeycomb Structure Under Lateral Loading 2019 Chuli, Abd Jumaidi TA Engineering (General). Civil engineering (General) Nowadays, aluminium honeycomb has become well-known as a good energy absorbing cellular structure. Due to its lightweight and high stiffness properties, this structure has been more preferable metallic material compared to others in term of producing an energy absorbing structure. This study is concerned with the energy absorption characteristics of aluminium honeycomb structure. For the crashworthiness of a material research area, this study offers more understanding of the behaviour of aluminium honeycomb when subjected to quasi-static and dynamic lateral compression. Five different densities of honeycomb structure (empty and Oil Palm Trunk-filled with different densities) were introduced to study their deformation mode as well as the energy absorption characteristic. Since lateral compression is involved, all specimens were compressed in two directions; x1-direction and x2-direction. The results show that the honeycomb cores exhibit anisotropic response during the compression. Under quasi-static and dynamic loading, honeycomb compressed in the x1- direction has higher energy absorption characteristics values such as collapse load, mean load, plateau load and energy absorption value compared to the honeycomb cores that were compressed in the x2-direction. This is due to the cell wall arrangement of double thickness wall (2t) in the honeycomb core; the 2t cell wall aligned vertically when compressed in x1- direction, and horizontally when compressed in the x2-direction. The vertically arranged 2t cell wall caused the honeycomb structure to be stronger and has a higher stiffness value. In term of deforming modes, all honeycombs show a very different response from each other. Besides, the addition of filler element material (Oil Palm Trunk sawdust) into the honeycomb core caused the energy absorption values to increase by 83% in x1-direction and 91% in the x2-direction. Since the honeycomb is a man-made structure, the imperfections are randomly distributed in all parts of the structure. This caused the initiation point for the deforming mode of the honeycomb which occurred at the weakest point in the structure to be started in a random manner. All experimental results were compared by using finite element software, and a good agreement between them was shown for the compression of empty honeycomb. The main factors that caused the dissimilarity between the experimental and simulation results were found to be the imperfections of the honeycomb cores; the irregularities of the cell wall and the geometrical imperfections of the honeycomb that occurred during the manufacturing process. 2019 Thesis http://eprints.utem.edu.my/id/eprint/24661/ http://eprints.utem.edu.my/id/eprint/24661/1/An%20Investigation%20Of%20Energy%20Absorption%20Characteristics%20Of%20Honeycomb%20Structure%20Under%20Lateral%20Loading.pdf text en public http://eprints.utem.edu.my/id/eprint/24661/2/An%20Investigation%20Of%20Energy%20Absorption%20Characteristics%20Of%20Honeycomb%20Structure%20Under%20Lateral%20Loading.pdf text en validuser https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=116900 mphil masters Universiti Teknikal Malaysia Melaka Faculty of Mechanical Engineering Ali, Mohd Basri 1. ABAQUS, 2016. Abaqus 6.14 Documentation [online]. Dassault Systèmes Simulia Corp. 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An Investigation Of Energy Absorption Characteristics Of Honeycomb Structure Under Lateral Loading

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