Improvement of high velocity impact performance of carbon nanotube and lead reinforced magnesium alloy

Abdullah, Mohd Harun; Abdullah, Siti Rozaimah Sheikh; Rahman, N. A.; Risby, M. S.; Omar, Mohd Zaidi; Sajuri, Zainuddin

doi:10.15282/ijame.13.2.2016.11.0283

Cited by 11 publications

(3 citation statements)

References 19 publications

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“…Thus, it is important to properly determine the behaviour and properties of new materials to be used in these vehicles. Incorporating existing materials with lightweight materials such as composites, aluminium foam and aluminium alloys has become of interest nowadays [2][3][4]. Aluminium and its alloys are among materials widely used to achieve lightweight construction and improve vehicle crashworthiness.…”

Section: Introductionmentioning

confidence: 99%

Energy absorption capability and deformation of laminated panels for armoured vehicle materials

Rahman

Abdullah²,

Abdullah

et al. 2022

Int. J. Automot. Mech. Eng.

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This paper investigates the computational-based deformation and energy absorption capability of laminated metal panels composed of high-strength steel and aluminium alloy under low-velocity impact. Layering aluminium alloy plates with high-strength steel has become of interest for reducing the overall density of armoured vehicle bodies while improving the ballistic resistance. In order to enhance the attractiveness of laminated plate construction, it is essential to study the strength of the two different metals in a laminated panel under low-velocity impact before performing a ballistic impact. Two types of laminated panels were constructed: two-layer and three-layer configurations. Both were oriented transverse to the loading axis and solved using quasi-static analysis. The deformation behaviour of these panels was studied and the energy absorption capacities were quantified. The results showed that the energy absorption capacities of the laminated panels were on average 220% higher in the three-layer configuration panels compared to in the two-layer configuration panels. The deformation lengths in the three-layer configuration panels were on average 22% smaller than those of the two-layer configuration panels with 25% to 30% weight reduction. The best three-layer configuration panel will be used later for investigating a suitable combination panel for armoured vehicles subjected to ballistic impact.

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Section: Introductionmentioning

confidence: 99%

Energy absorption capability and deformation of laminated panels for armoured vehicle materials

Rahman

Abdullah²,

Abdullah

et al. 2022

Int. J. Automot. Mech. Eng.

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“…Adding CNT alone without optimal value may decreased the energy absorption capability as the introduction of insufficient CNT will make the material prone to molecule sliding [8]. As mention from the previous studies, the presence of CNT and Pb had proven to affect the material behavior in term of ballistic impact [9,10], thus energy absorption performance. Mention that their several to enhance magnesium alloy such heat treatment such as annealing, quenching, normalizing and so on [11,12].…”

Section: Introductionmentioning

confidence: 99%

Energy Absorption at High Strain Rate of Magnesium Alloy AZ31B

Mubasyir¹,

Abdullah²,

Ahmad³

et al. 2020

IJIE

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This paper presents the efficient energy absorption of magnesium alloy AZ31B with reinforcement carbon nanotubes (CNT) and lead (Pb). The high specific energy absorption demonstrated by CNT compared to metals is one of the criteria to improve the AZ31B performance against ballistic penetration. More ductility by adding Pb in the alloy also plays a vital role to increase the energy absorption capability. Four-cylinder shape AZ31B-based specimens are tested dynamically by using compression Split Hopkinson Pressure Bar (SHPB). The diameter and thickness of the specimen is 18 mm and 12.5 mm respectively. The striking velocity used in this work is 20 m/s. By equation of 1D wave propagation, stress-strain curve is plotted and the area under the curve is equivalent to energy absorption. The highest energy absorption is about 270 kJ with the increment of 47% compared to original AZ31B. This increment is consistent with the higher strain rate experienced by the specimen during the test. The strain rate determined from the study is 1300 per second compared to original AZ31B of 850 per second. The finding of this paper is the presence of CNT and lead could improve the energy absorption performance as the strain rate of the specimen also increased.

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“…They found that at increasing strain rates, tensile properties are strain rate dependent. For magnesium alloys, Abdullah et al [7] reported that these alloys were capable of withstanding high speed impacts that performed using the Split Hopkinson pressure bar tester. However, the trend of tensile properties at low to intermediate strain rates for extruded AZ31 and AZ61 magnesium alloys are still unknown.…”

Section: Introductionmentioning

confidence: 99%

Effect of tensile strain rates on flow stress for extruded AZ31 and AZ61 magnesium alloys

Latif

Sajuri²,

Syarif

2017

Int. J. Automot. Mech. Eng.

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Aluminium-Zinc (AZ) is a popular series of magnesium alloy and is used in automobile components and structures. In this regard, the AZ series is subject to high velocity and impact loads during accidents. Thus, it is essential that the effect of tensile strain rates i.e., low and intermediate strain rates, on flow stress of extruded AZ31 and AZ61 magnesium alloys is investigated. In this study, tensile test under low strain rates were fixed at 1×10 -4 , 1×10 -3 , 1×10 -2 and 1×10 -1 s -1 , while tensile tests under intermediate strain rates were fixed at 100, 200, 400 and 600 s -1 . The tensile test specimens were prepared with a gage length and diameter of 10 mm and 3 mm, respectively. Flow stress was determined by averaging the values of yield stress and tensile strength of the alloy. The results showed that the flow stresses of both extruded magnesium alloys were strain rate dependent. This is believed to be due to the increasing dislocation density in the materials. Thus, the resistance to deformation increased with an increasing volume of dislocation density for extruded AZ31 and AZ61 alloys. Moreover, the flow stresses of both alloys were strain rate dependent; the activation of critical resolved shear stress (CRSS) of non-basal slip systems for magnesium alloys significantly influenced the deformation mechanism of the materials. Additionally, flow stresses of both magnesium alloys increased at increasing strain rate due to the large numbers of twinning in alloys. Hence, tensile strain rates significantly affect the flow stress and failure mechanism of magnesium alloys.

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Improvement of high velocity impact performance of carbon nanotube and lead reinforced magnesium alloy

Cited by 11 publications

References 19 publications

Energy absorption capability and deformation of laminated panels for armoured vehicle materials

Energy absorption capability and deformation of laminated panels for armoured vehicle materials

Energy Absorption at High Strain Rate of Magnesium Alloy AZ31B

Effect of tensile strain rates on flow stress for extruded AZ31 and AZ61 magnesium alloys

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