Impact resistance of foamed concrete slab and its modifications subjected to hemispherical impactor

This research work examined the interplay between three main methods: experimental works, analytical model and numerical simulation. The three methods employed slabs of foamed concrete and its modifications. The modifications of foamed concrete included foamed concrete substituting sand with Rice Hu...

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Main Author:	Hadipramana, Josef
Format:	Thesis
Language:	English English English
Published:	2015
Subjects:	TA401-492 Materials of engineering and construction Mechanics of materials
Online Access:	http://eprints.uthm.edu.my/1515/2/JOSEF%20HADIPRAMANA%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/1515/1/24p%20JOSEF%20HADIPRAMANA.pdf http://eprints.uthm.edu.my/1515/3/JOSEF%20HADIPRAMANA%20WATERMARK.pdf
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spelling	my-uthm-ep.15152021-10-03T07:48:21Z Impact resistance of foamed concrete slab and its modifications subjected to hemispherical impactor 2015-01 Hadipramana, Josef TA401-492 Materials of engineering and construction. Mechanics of materials This research work examined the interplay between three main methods: experimental works, analytical model and numerical simulation. The three methods employed slabs of foamed concrete and its modifications. The modifications of foamed concrete included foamed concrete substituting sand with Rice Husk Ash (RHA) and foamed concrete reinforced by Polypropylene fibre (PF). Experimental work produced properties data of density, compressive strength, tensile strength, modulus of elasticity and Poisson’s ratio of slab specimens. The experiment of impact was conducted by using falling-weight impact tower method to get the depth of penetration data. The depth of crater as product of impact is called penetration depth. The basic properties of materials were used to run the numerical simulation and analytical model. The simulation applied the FE/DE method, whilst the analytical model was conducted by applying various theories and all its support from previous researchers both in empirical and non-empirical. The slab target subjected to hemispherical impactor with 7.7, 8.9 and 9.9 m/s impact velocity produced the crater without spalling or scabbing. This impact phenomenon was due to effect of porosity in matrix of foamed concrete and its modifications as foam material. Foamed concrete modifications were stronger than foamed concrete, which gave the shallower penetration depth than penetration depth of foamed concrete. Resistance of slab specimens subjected to impact loading can be predicted by its penetration depth. It can be determined by the assumption, when impactor hit the slab target, the diameter of impactor shank entirely into target due to porosity. The dimensional of penetration depth was derived when the impactor had kinetic energy and target initiate gave a reaction by its compressive strength against the force of impact. The dimensional penetration depth can be used as a formula to predict penetration depth of foamed concrete and its modification slabs subjected to hemispherical impact loading. The numerical simulation results were validated by the experimental results. Those three of analyses methods showed a tendency the same results for penetration depth. 2015-01 Thesis http://eprints.uthm.edu.my/1515/ http://eprints.uthm.edu.my/1515/2/JOSEF%20HADIPRAMANA%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/1515/1/24p%20JOSEF%20HADIPRAMANA.pdf text en public http://eprints.uthm.edu.my/1515/3/JOSEF%20HADIPRAMANA%20WATERMARK.pdf text en validuser phd doctoral Universiti Tun Hussein Onn Malaysia Faculty of Civil and Environmental Engineering
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English English
topic	TA401-492 Materials of engineering and construction Mechanics of materials
spellingShingle	TA401-492 Materials of engineering and construction Mechanics of materials Hadipramana, Josef Impact resistance of foamed concrete slab and its modifications subjected to hemispherical impactor
description	This research work examined the interplay between three main methods: experimental works, analytical model and numerical simulation. The three methods employed slabs of foamed concrete and its modifications. The modifications of foamed concrete included foamed concrete substituting sand with Rice Husk Ash (RHA) and foamed concrete reinforced by Polypropylene fibre (PF). Experimental work produced properties data of density, compressive strength, tensile strength, modulus of elasticity and Poisson’s ratio of slab specimens. The experiment of impact was conducted by using falling-weight impact tower method to get the depth of penetration data. The depth of crater as product of impact is called penetration depth. The basic properties of materials were used to run the numerical simulation and analytical model. The simulation applied the FE/DE method, whilst the analytical model was conducted by applying various theories and all its support from previous researchers both in empirical and non-empirical. The slab target subjected to hemispherical impactor with 7.7, 8.9 and 9.9 m/s impact velocity produced the crater without spalling or scabbing. This impact phenomenon was due to effect of porosity in matrix of foamed concrete and its modifications as foam material. Foamed concrete modifications were stronger than foamed concrete, which gave the shallower penetration depth than penetration depth of foamed concrete. Resistance of slab specimens subjected to impact loading can be predicted by its penetration depth. It can be determined by the assumption, when impactor hit the slab target, the diameter of impactor shank entirely into target due to porosity. The dimensional of penetration depth was derived when the impactor had kinetic energy and target initiate gave a reaction by its compressive strength against the force of impact. The dimensional penetration depth can be used as a formula to predict penetration depth of foamed concrete and its modification slabs subjected to hemispherical impact loading. The numerical simulation results were validated by the experimental results. Those three of analyses methods showed a tendency the same results for penetration depth.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Hadipramana, Josef
author_facet	Hadipramana, Josef
author_sort	Hadipramana, Josef
title	Impact resistance of foamed concrete slab and its modifications subjected to hemispherical impactor
title_short	Impact resistance of foamed concrete slab and its modifications subjected to hemispherical impactor
title_full	Impact resistance of foamed concrete slab and its modifications subjected to hemispherical impactor
title_fullStr	Impact resistance of foamed concrete slab and its modifications subjected to hemispherical impactor
title_full_unstemmed	Impact resistance of foamed concrete slab and its modifications subjected to hemispherical impactor
title_sort	impact resistance of foamed concrete slab and its modifications subjected to hemispherical impactor
granting_institution	Universiti Tun Hussein Onn Malaysia
granting_department	Faculty of Civil and Environmental Engineering
publishDate	2015
url	http://eprints.uthm.edu.my/1515/2/JOSEF%20HADIPRAMANA%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/1515/1/24p%20JOSEF%20HADIPRAMANA.pdf http://eprints.uthm.edu.my/1515/3/JOSEF%20HADIPRAMANA%20WATERMARK.pdf
_version_	1747830807673700352

Impact resistance of foamed concrete slab and its modifications subjected to hemispherical impactor

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