Critical impact energies for scabbing and perforation of concrete target

Li, Q.M.; Reid, S.R.; Ahmad-Zaidi, A M

doi:10.1016/j.nucengdes.2005.10.017

Cited by 47 publications

(33 citation statements)

References 5 publications

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“…7), where both of materials have different compressive strength (see Table 1). From the result indicates that strength of concrete play an important role for penetration depth of concrete beside impact velocity, where the result agrees with previous researchers [13,17,[20][21][22]. …”

Section: Penetration Valuessupporting

confidence: 91%

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An investigation of Crater Diameter on Plain Slab Foamed Concrete Rice Husk Ash (FCRHA) Exposed to Low Impact Loading

et al. 2017

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Abstract. As sustainable material building and construction, the foamed concrete (FC) in this investigation was modified by adding the Rice Husk Ash (RHA) as sand replacement to increase its strength. Furthermore, this modification material (is called FCRHA) treated on impact loading. This investigation was motivated when the plain slab of FCRHA subjected to small impactor, then the nose impactor over all would penetrate into slab target due to porosity of FCRHA. The experimental produced plain slabs FCRHA and FC (as a control) with 1400 kg/m 3 and 1600 Kg/m 3 of densities. In impact test all plain slabs exposed by 40 mm steel blunt nose impactor with various impact velocities. The result showed the crater which produced by impact loading was not found spalling, scabbing, radial crack and widely cratering. This local damage occurred when porosity of FCRHA took over the impact loading. The nose impactor over all considered have been successful penetrated into slab of FCRHA and FC. Therefore, the diameter of crater equals to diameter of impactor. With this certainty, the prediction penetration depth on plain slab FCRHA (also FC) can be determined in future investigation. In addition, the penetration of impactor on FCRHA with low impact velocity give the same impression on penetration impactor with high impact velocity on FC.

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Section: Penetration Valuessupporting

confidence: 91%

“…By the penetration depth the local damage on slab could be determined, even for perforation prediction [20]. Table 1 presents the penetration depth (Xe) and diameter of crater (D C ) of each material due to various velocities of impact loading.…”

Section: Penetration Valuesmentioning

confidence: 99%

An investigation of Crater Diameter on Plain Slab Foamed Concrete Rice Husk Ash (FCRHA) Exposed to Low Impact Loading

et al. 2017

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“…After 24 hours the specimens removed from mould and they were treated with the same temperature limited for 28 curing days. It was the same way to produce 600 mm x 600 mm x 160 mm the slab target, which the thickness of slab conforming to some prediction formulas [7,[13][14][15][16] to predict the slab thickness subjected to impact loading using dimensionless prediction. SEM and EDS was applied to determine the microstructure and composition of foamed concrete containing RHA.…”

Section: Experimental and Test Proceduresmentioning

confidence: 99%

Contribution of RHA Granules as Filler to Improve the Impact Resistance of Foamed Concrete

Hadipramana

Samad

Mujahid³

et al. 2013

KEM

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Abstract. Foamed concrete as aerated concrete widely used in range of constructions application, no exception to structure shield. As structure shield is important to resist on impact loading. Whilst, Rice Husk Ash (RHA) as agro-waste potentials as filler for foamed concrete. RHA that is produced by uncontrolled burning under 700ºC during ± 6 hours obtain the granules contain the carbon and porous. The granules of RHA may fill the porous in matrix foamed concrete without remove the characteristic the foamed concrete its self as aerated concrete. This investigation RHA has been used as a replacement for fine aggregate. Target density 1800 kg/m 3 of foamed concrete both of with and without RHA have been produced to compare their strength and characteristic of impact resistance. SEM and EDS test has been conducted to determine microstructure and chemical composition of foamed concrete with RHA. The results showed that granules of RHA filled the porous and bonded with the denser part into matrix. The presence of granules of RHA has been changing the role of the air cell of porous in foamed concrete when it was subjected to impact loading. Also the granules of RHA give the foamed concrete denser without losing its characteristic of porous entirely.

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“…It is essential to determine the effects of kinetic energy and relative target thickness on local impact effect with dimensional analysis of non-dimensional numbers (Q. M. Li et al 2006). The critical impact kinetic energy, which can produce perforation in to the concrete target with the impact of hard missile, can be calculated by using empirical formula derived by UMIST (Q. M. Li et al 2005).…”

Section: Literature Reviewmentioning

confidence: 99%

Development of Empirical formula Prediction on Critical Impact Energy for Perforation Phenomena on Concrete Structures

Latif¹,

Rahman²,

Zaidi³

2011

JMR

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Concrete is basic construction material used for most structures. However, the vital structures have to be designed as selfprotective such as nuclear plants, power plants, weapon industries, weapons storage places, water retaining structures, highway structures, and etc. These structures should have to be offer self shield against any natural disaster tragedy incidents and intentionally produced horrible incidents such as dynamic loading, incident occurs in nuclear plants, terrorist attack, missile attack, tsunami and etc. In modern science, the impact energies are crucial way to study the local impact effects on concrete structures together with the influence of relative target thickness (H/d). This study is focused on minimum required kinetic energy for perforation of the concrete structures generated by flat nose hard missile in terms of relative target thickness (H/d), by using curve fitting empirical study with the implementation of dimensional analysis of non-dimensional numbers. For verification, the proposed developed empirical formula was well compared with other established empirical formulae such as NDRC, UMIST and Semi Empirical formulae and it is expected that the outcome of the proposed formulae can be applied in design recommendations and design procedures for determining the dynamic reaction of the concrete target to foil perforation of flat nose hard missile.

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Critical impact energies for scabbing and perforation of concrete target

Cited by 47 publications

References 5 publications

An investigation of Crater Diameter on Plain Slab Foamed Concrete Rice Husk Ash (FCRHA) Exposed to Low Impact Loading

An investigation of Crater Diameter on Plain Slab Foamed Concrete Rice Husk Ash (FCRHA) Exposed to Low Impact Loading

Contribution of RHA Granules as Filler to Improve the Impact Resistance of Foamed Concrete

Development of Empirical formula Prediction on Critical Impact Energy for Perforation Phenomena on Concrete Structures

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