Numerical evaluation of ballistic limit velocity and experimental ballistic response of 25 mm thick aluminium 7075 alloy targets

Praveen, R.; Rao, S. R. Koteswara; Kumar, Satyendra; Babu, T. Rajesh

doi:10.1016/j.matpr.2022.03.587

Cited by 4 publications

(4 citation statements)

References 12 publications

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“…The mechanical behaviour and the mechanics involved during the impact loading of a material involves complex phenomenon like strain hardening, plastic flow, thermal softening and fracture. The Johnson-Cook Model is a thermoviscoplastic model to model the behavior of the material over a wide range of temperatures and strain rates [ 24 ].…”

Section: Preparation Of Aa5083 Bm and Fsw Targets For Experimentalmentioning

confidence: 99%

“…Damage criteria are also crucial for obtaining reliable numerical ballistic results [22]. It was discovered that the correlation between experimental and numerical ballistic impact analysis of two distinct heat treated AA7075 aluminium alloy targets was stronger [23][24][25]. The vast majority of research on AA5083 targets [8,9] has been conducted using thin sheets and single hits.…”

Section: Introductionmentioning

confidence: 99%

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Comparative analysis of experimental and numerical investigation on multiple projectile impact of AA5083 friction stir welded targets

Balaji¹,

Kumar²,

Magarajan³

et al. 2023

PLoS ONE

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This research aims to investigate the ballistic resistance of base material (BM)and “Friction Stir Welded (FSW)”, AA5083 aluminum alloy. The primary objective was to build a finite element model to predict kinetic energy absorption and target deformation under single and multiple projectile impact conditions. This study employed 7.62mm Hard Steel Core (HSC) projectiles produced from Steel 4340. The target was analyzed using commercially available Abaqus Explicit software for Finite Element Analysis. It was noticed that the generation of kinetic energy and surface residual velocity increases as the number of projectile strikes increases. In addition, the experimental ballistic test was conducted to validate the numerical results. Using the analytical Recht-Ipson model, each target’s experimental residual velocity was determined. It was determined that weldments perform less well (30%) as compared to BM targets. Occurrence of plastic deformation during welding causes reduction in ballistic performance of weldments. For both the computational and experimental approaches, a correlation between residual velocities was found. The plastic deformations with ductile hole formation were observed in all the cases.

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Section: Preparation Of Aa5083 Bm and Fsw Targets For Experimentalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparative analysis of experimental and numerical investigation on multiple projectile impact of AA5083 friction stir welded targets

Balaji¹,

Kumar²,

Magarajan³

et al. 2023

PLoS ONE

View full text Add to dashboard Cite

show abstract

“…A group of researchers investigated the ballistic response of aluminium 7xxx grades at higher impact velocity projectiles using experimental, theoretical and numerical studies. 12,13 By using the friction stir processing approach, 14,15 the ballistic performance of B 4 C reinforced AA7075 target was investigated. They reported that adding boron carbide and molybdenum disulphide to the surface of the aluminium alloy 7075 target surface improved its wear and ballistic resistance.…”

Section: Introductionmentioning

confidence: 99%

“…So far, the literature has dealt with a variety of numerical and experimental ballistic studies on composite materials, surface modifications, reinforcement of metal matrix composites, different kinds of projectiles and their shapes, optimized ballistic limit velocities, and friction stir process plates. [1][2][3][4][5][6][7][8][9][10][12][13][14][15][16][17][18][19][20][21][22][23][24][25] Furthermore, there are numerous reports in the literature on the high-velocity impact of various Al alloys; a comprehensive study on the projectile's penetration behaviour in single layered rolled condition plates of various thicknesses and heat treatments are needed. As a result, the specified condition of heat treatment and optimized target thickness necessary to prevent complete penetration can be chosen.…”

Section: Introductionmentioning

confidence: 99%

Optimization of target thickness and investigation on the effect of heat treatment on the ballistic performance of aluminium alloy 7075 targets against hard steel core projectile

Praveen

Rao

Kumar

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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Optimization of target thickness and influence of heat treatment condition on the high velocity impact response of aluminium alloy 7075 targets have been determined. Both experimental and numerical studies were conducted using a 7.62 mm hard steel core projectile. The numerical simulation used a 7.62 mm Ogival nose shaped projectile with a target thickness ranging from 20 to 26 mm. High velocity impact experiments on T651 and solution treated targets, with rolled plate thicknesses ranging from 21 to 25 mm were carried out to validate the numerical findings. The microhardness of the targets was measured using Vicker's microhardness tester and fractographs were examined using a scanning electron microscope. The projectile penetrated regions were analyzed using light microscopy. A good correlation between the numerical and experimental ballistic behaviour of aluminium alloy 7075 targets was observed and an optimum target thickness of 21 and 24 mm was observed for the T651 and solution treated targets to prevent the projectile's penetration. It was also noted that, after the projectile's impact, solution treated targets had higher microhardness compared to T651 condition targets. This is due to higher work hardening of solution treated targets near the penetration channel. Even though T651 targets have a lower depth of penetration compared to solution treated targets, ‘splintering’ failure of the T651 targets is observed. In contrast, ‘petalling’ and ‘plugging’ kinds of failures were noticed on the solution treated targets. Thus, solution treatment of ballistic targets may enhance the ballistic limit of armoured vehicles.

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High-Velocity Projectile Impact Behaviour of Friction Stir Welded AA7075 Thick Plates

et al. 2023

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Numerical evaluation of ballistic limit velocity and experimental ballistic response of 25 mm thick aluminium 7075 alloy targets

Cited by 4 publications

References 12 publications

Comparative analysis of experimental and numerical investigation on multiple projectile impact of AA5083 friction stir welded targets

Comparative analysis of experimental and numerical investigation on multiple projectile impact of AA5083 friction stir welded targets

Optimization of target thickness and investigation on the effect of heat treatment on the ballistic performance of aluminium alloy 7075 targets against hard steel core projectile

High-Velocity Projectile Impact Behaviour of Friction Stir Welded AA7075 Thick Plates

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