Experimental and Numerical Investigation on the Layering Configuration Effect to the Laminated Aluminium/Steel Panel Subjected to High Speed Impact Test

Abstract

This paper presents the effect of laminated aluminium-steel panel with different configurations in a high-speed impact test. Layering aluminium plate with high strength steel has become an interest in reducing the overall density of armour vehicle body while improving the ballistic resistance. Different layering configurations differ in laminated panel performance. Two layering configurations of double-layered panel achieving 25% of existing panel weight reduction were tested using experiment and computational method to investigate their behaviours when impacted with 7.62-mm full metal jacket at velocity range of 800–850 m/s. The ballistic performance of each configuration plate in terms of ballistic limit velocity, penetration process and permanent deformation was quantified and considered. Laminated panel with aluminium as the front layer reduced the ballistic performance of existing panel to 50% and the other panel maintained its performance. Thus, the laminated panel with aluminium as the back layer can be used in designing a protective structure for armoured vehicle while maintaining the performance of the existing vehicle in achieving weight reduction.

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

“…In the case studied, the configuration with the aluminum plate as a front layer (target AS) has almost half the specific ballistic energy of the configuration with the steel plate as a front layer (target SA). This finding is in agreement with the experimental results of Babaei et al [ 6 ], Yunfei et al [ 7 ] and Rahman et al [ 12 ], which also observed that better ballistic performance is obtained if the stronger material is placed as the front layer of a double-layered configuration. This is also in agreement with the results obtained by the authors for soft-core projectiles [ 38 ].…”

“…The configuration with polyurethane as joining material was shown to give the best performance. Rahman et al [ 12 ] studied two target configurations: 15 mm Ar500 steel + 10 mm AA7075-T6 and 10 mm AA7075-T6 + 15 mm Ar500 steel. The projectile was a 7.62 mm full metal jacket bullet with a lead core.…”

“…Numerical studies [ 5 , 8 , 10 ] showed that it is possible to decrease the weight of the shield using layers of different metals. Among the published papers, only [ 6 , 12 ] experimentally investigated the shields with layers of different metals (steel and aluminum alloy), but no comparison was made with a monolithic shield of the same weight. Only one of these studies actually measured the ballistic limit velocity [ 6 ], but the investigation was based on thin plates and blunt projectiles.…”

Assessment of the Impact Resistance of a Composite Material with EN AW-7075 Matrix Reinforced with α-Al2O3 Particles Using a 7.62 × 39 mm Projectile

“…Efforts to understand the physical processes are directed towards searching for new material solutions, the mechanical properties of which should exceed those of the traditional material. Such materials include ceramics, polymers, and composites, which are now a new option [10][11][12][13][14]. Each material and composite should meet the need for continuous improvement in the development of missiles and weapons, and, under specific conditions, new applications [15][16][17].…”

Experimental and numerical investigation of hybrid armor against a ballistic impact

“…The decrease in the kinetic energy of the three projectiles during the ballistic impact event is shown in Figure 8, where it can be seen that armor 2 had required a shorter time to stop the semisphere and cylindrical projectile than that of ogival (Rahman et al , 2018), but on the other hand, these two bullets could penetrate a shorter distance than the ogival projectile. The projectile penetration period in the armor is related to how much energy the projectile had during the ballistic impact event where the ogival projectile had a larger amount of kinetic energy as evident in Figure 8 because of its sharp edge which gave it a stronger ballistic effect (Ahmed, 2016).…”