Armor-Penetrator Performance Measures

Frank, Konrad

doi:10.21236/adb058174

Cited by 6 publications

(3 citation statements)

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“…Honeycomb topologies are significantly more efficient at supporting stress than their equivalent relative density metal foams, and have been shown to be very effective at dissipating the energy of projectiles provided the area of the impact is large compared to the cell size (Frank 1981;Goldsmith & Louie 1995). They offer much less resistance if the projectiles do not interact with the webs in these structures.…”

Section: (C ) Hybrid Ballistic Latticesmentioning

confidence: 99%

Multifunctional periodic cellular metals

Wadley

2005

Phil. Trans. R. Soc. A.

694

352

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Periodic cellular metals with honeycomb and corrugated topologies are widely used for the cores of light weight sandwich panel structures. Honeycombs have closed cell pores and are well suited for thermal protection while also providing efficient load support. Corrugated core structures provide less efficient and highly anisotropic load support, but enable cross flow heat exchange opportunities because their pores are continuous in one direction. Recent advances in topology design and fabrication have led to the emergence of lattice truss structures with open cell structures. These three classes of periodic cellular metals can now be fabricated from a wide variety of structural alloys. Many topologies are found to provide adequate stiffness and strength for structural load support when configured as the cores of sandwich panels. Sandwich panels with core relative densities of 2-10% and cell sizes in the millimetre range are being assessed for use as multifunctional structures. The open, three-dimensional interconnected pore networks of lattice truss topologies provide opportunities for simultaneously supporting high stresses while also enabling cross flow heat exchange. These highly compressible structures also provide opportunities for the mitigation of high intensity dynamic loads created by impacts and shock waves in air or water. By filling the voids with polymers and hard ceramics, these structures have also been found to offer significant resistance to penetration by projectiles.

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Section: (C ) Hybrid Ballistic Latticesmentioning

confidence: 99%

Multifunctional periodic cellular metals

Wadley

2005

Phil. Trans. R. Soc. A.

694

352

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“…A study by Madhu et al [38] examined the "ballistic performance" of 95% and 99.5% "alumina tiles" against a 12.7 mm AP projectile. As a function of the "ceramic thickness", and the "velocity of the projectile", a "ballistic efficiency factor (BEF)" was calculated based on Frank's work [39]. There was a higher ballistic performance for alumina 99.5% as compared to alumina 95%.…”

Section: Plos Onementioning

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

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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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“…Many variations and terminologies exist, but Frank [11 ] developed and described a concise set ofrnass and space effectiveness factors whose conventions are in use at ARL. The shaped charge tests in this paper are similar to standard depth of penetration tests, and the equivalent RHA performance of the titanium relative the semi-infinite penetration of the rod can be determined.…”

Section: Ballistic Characterizationmentioning

confidence: 99%

The penetration resistance of a titanium alloy against jets from tantalum shaped charge liners

Walters

Gooch

Burkins

2001

International Journal of Impact Engineering

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-Titanium alloys, notably Ti-6AL-4V, are known to provide high mass effectiveness against kinetic energy penetrators. However, the penetration effectiveness of titanium against shaped charge jets has not been investigated in detail. An experimental study was conducted with Ti-6Al-4V billets impacted by shaped charge jets formed from 100-mm, 42-degree conical shaped charge liners fabricated from tantalum. This work represents the first study ofhyperveloeity, highdensity jet penetration into titanium alloys.

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Armor-Penetrator Performance Measures

Cited by 6 publications

References 0 publications

Multifunctional periodic cellular metals

Multifunctional periodic cellular metals

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

The penetration resistance of a titanium alloy against jets from tantalum shaped charge liners

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