Influence of layer number and air gap on the ballistic performance of multi-layered targets subjected to high velocity impact by copper EFP

Liu, Jianfeng; Long, Yuan; Ji, Chong; Liu, Qiang; Zhong, Mingshou; Zhou, Y.

doi:10.1016/j.ijimpeng.2017.10.001

Cited by 25 publications

(9 citation statements)

References 45 publications

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“…The finite element method with Lagrangian approach is the traditional choice for developing a numerical model of high-velocity impact on metal shields. The numerical model is usually three-dimensional [ 5 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ] but also an axisymmetric model [ 1 , 4 , 24 ] has been used in the literature. The former is able to simulate more realistically the physical characteristics of the phenomenon but requires far more computational resources.…”

Section: Introductionmentioning

confidence: 99%

“…The former is able to simulate more realistically the physical characteristics of the phenomenon but requires far more computational resources. In terminal ballistics, the Johnson–Cook model [ 25 ] is the most popular constitutive relation used to predict the mechanical behavior of metals under high-velocity impact [ 1 , 4 , 5 , 13 , 14 , 15 , 16 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 26 , 27 ]. This constitutive relation takes into account the effect of plastic strain hardening, strain rate hardening and thermal softening.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and Numerical Investigation on the Perforation Resistance of Double-Layered Metal Shield under High-Velocity Impact of Armor-Piercing Projectiles

2021

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In the case of protection of transportation systems, the optimization of the shield is of practical interest to reduce the weight of such components and thus increase the payload or reduce the fuel consumption. As far as metal shields are concerned, some investigations based on numerical simulations showed that a multi-layered configuration made of layers of different metals could be a promising solution to reduce the weight of the shield. However, only a few experimental studies on this subject are available. The aim of this study is therefore to discuss whether or not a monolithic shield can be substituted by a double-layered configuration manufactured from two different metals and if such a configuration can guarantee the same perforation resistance at a lower weight. In order to answer this question, the performance of a ballistic shield constituted of a layer of high-strength steel and a layer of an aluminum alloy impacted by an armor piercing projectile was investigated in experimental tests. Furthermore, an axisymmetric finite element model was developed. The effect of the strain rate hardening parameter C and the thermal softening parameter m of the Johnson–Cook constitutive model was investigated. The numerical model was used to understand the perforation process and the energy dissipation mechanism inside the target. It was found that if the high-strength steel plate is used as a front layer, the specific ballistic energy increases by 54% with respect to the monolithic high-strength steel plate. On the other hand, the specific ballistic energy decreases if the aluminum plate is used as the front layer.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation on the Perforation Resistance of Double-Layered Metal Shield under High-Velocity Impact of Armor-Piercing Projectiles

2021

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“…Air gaps reduce the bending stiffness of the plates, changing their failure mechanisms from shear to tensile modes, therefore, increasing the dissipated energy compared to their bulk laminate counterparts. Considering the complexity of the interaction between different plates and materials, numerical simulations are usually employed to provide a thorough insight of the coupled failure mechanisms [24,25]. Finite element analysis is a powerful tool which allows to explicitly combine all the target components and analyse the failure sequence, with a higher accuracy than the one offered by high speed imaging.…”

Section: Introductionmentioning

confidence: 99%

Multiscale numerical optimisation of hybrid metal/nonwoven shields for ballistic protection

Vila-Ortega

Ridruejo

Martínez-Hergueta

2020

International Journal of Impact Engineering

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This research presents a detailed numerical study of the ballistic performance of lightweight hybrid metal/nonwoven shields for automotive applications. Several configurations, including different number of nonwoven fabrics, were analysed to find the optimal design. Impact response of the nonwoven fabric was predicted by a multiscale numerical constitutive model able to capture its complex deformation and failure mechanisms: fibre straightening, realignment and disentanglement. Special attention was paid to the interaction between layers for different air gaps in the final energy absorption capacity of the shield, and detailed analysis of the different sequences of triggered failure modes was provided. The hybrid shield outperformed the previous configurations, resulting in an absorption capacity about twice the sum of the energies dissipated by the steel plates and the nonwovens individually. Furthermore, the hybrid shield increased the energy absorption capacity of the baseline steel plates by a factor over 8, with an almost negligible increment of areal weight of 5.5%, giving the possibility to improve the ballistic performance of conventional automotive components without penalising the fuel consumption of the vehicle.

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“…В качестве перспективного решения для металлических защитных систем отмечается использование многослойных конструкций. Влияние количества слоев и воздушного зазора на баллистические характеристики многослойных стальных преград, подвергнутых высокоскоростному воздействию медного осколочного снаряда, рассмотрено в [1].…”

Section: Introductionunclassified

Исследование Защитных Свойств Комбинированного Металлокерамического Материала При Высокоскоростном Ударе

Ищенко¹,

Афанасьева²,

Белов³

et al. 2020

Журнал Технической Физики

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The analysis of ballistics resistance of a combined metal-ceramic material based on high-strength ceramics in conjunction with the intermetallic on high strength metallic substrate layer – (TiB2+NiTi)+Ti in comparison with the steel plates, the titanium alloy BT1-0 plates and the corundum ceramics plates under impact with the steel spherical striker in velocity range about 2500 m/s was carried out. An experimental researches of protective barriers under the high-speed impact were carried out on the high-speed ballistic experimental facility. A mathematical modeling for the porous elastoplastic medium with taking an account various mechanisms of materials disruptions which was modified for mediums with complicated composition was carried out. There is shown, under the considered impact velocity range at breaking through barriers, in spite of low superficial density, a material (TiB2+NiTi)+Ti shows more force impact on the striker and greater penetration resistance then the steel, the titanium and the ceramics.

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Influence of layer number and air gap on the ballistic performance of multi-layered targets subjected to high velocity impact by copper EFP

Cited by 25 publications

References 45 publications

Experimental and Numerical Investigation on the Perforation Resistance of Double-Layered Metal Shield under High-Velocity Impact of Armor-Piercing Projectiles

Experimental and Numerical Investigation on the Perforation Resistance of Double-Layered Metal Shield under High-Velocity Impact of Armor-Piercing Projectiles

Multiscale numerical optimisation of hybrid metal/nonwoven shields for ballistic protection

Исследование Защитных Свойств Комбинированного Металлокерамического Материала При Высокоскоростном Ударе

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