Engineering Transactions, 64, 3, pp. 351-366, 2016

A Study of the Ballistic Limit of AA2024-T351 Sheets Impacted by Spherical and Cubical Compact Projectiles

Tom DE VUYST
Brunel University, London
United Kingdom

Rade VIGNJEVIC
Brunel University, London
United Kingdom

Adrian AZORIN ALBERO
Cranfield University
United Kingdom

Kevin HUGHES
Brunel University, London
United Kingdom

James C. CAMPBELL
Brunel University, London
United Kingdom

Nenad DJORDJEVIC
Brunel University, London
United Kingdom

This paper presents the results of an investigation of the ballistic limits and failure modes of AA2024-T351 sheets impacted by spherical and cubical projectiles. The investigation included a series of impact experiments and numerical simulations. The lowest ballistic limit (225 m/s) was observed for the spherical projectile. In the cube impacts the ballistic limit was 254 m/s. With the aid of the finite element models it was possible to develop a better understanding of the test results and explain that the observed differences in the impact responses are due to the combination of the localised deformation near the projectile impact point and the resulting global, dishing, deformation.
Keywords: ballistic impact; compact projectiles; cube projectiles; failure mode
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References

Arias A., Rodríguez-Martínez J.A., Rusinek A., Numerical simulations of impact behaviour of thin steel plates subjected to cylindrical, conical and hemispherical nondeformable projectiles, Engineering Fracture Mechanics, 75(6): 1635–1656, 2008,

http://www.sciencedirect.com/science/article/pii/S0013794407002767.

Barlat F., Lege D.J., Brem J.C., A six-component yield function for anisotropic materials, International Journal of Plasticity, 7: 693–712, 1991,

http://www.sciencedirect.com/science/article/pii/074964199190052Z.

Buyuk M., Loikkanen M., Kan C.S., A computational and experimental analysis of ballistic impact to sheet metal aircraft structures, 5th Europe LS-DYNA Users Conference, 2005.

Børvik T., Hopperstad O.S., Pedersen K.O., Quasi-brittle fracture during structural impact of AA7075-T651 aluminium plates, International Journal of Impact Engineering, 37(5): 537–551, 2010,

http://www.sciencedirect.com/science/article/pii/S0734743X09001924.

Erice B., Pérez-Martín M.J., Gálvez F., An experimental and numerical study of ductile failure under quasi-static and impact loadings of Inconel 718 nickel-base superalloy, International Journal of Impact Engineering, 69: 11–24, 2014,

http://www.sciencedirect.com/science/article/pii/S0734743X14000384.

Gupta N.K., Iqbal M.A., Sekhon G.S., Effect of projectile nose shape, impact velocity and target thickness on the deformation behavior of layered plates, International Journal of Impact Engineering, 35(1): 37–60, 2008,

http://www.sciencedirect.com/science/article/pii/S0734743X06003186.

Gupta N.K., Iqbal M.A., Sekhon G.S., Effect of projectile nose shape, impact velocity and target thickness on deformation behavior of aluminum plates, International Journal of Solids and Structures, 44(10): 3411–3439, 2007,

http://www.sciencedirect.com/science/article/pii/S0020768306004045.

Hypermesh, http://www.altairhyperworks.co.uk, accessed online 14/08/2015.

Iqbal M.A., Tiwari G., Gupta P.K., Bhargava P., Ballistic performance and energy absorption characteristics of thin aluminium plates, International Journal of Impact Engineering, 77: 1–15, 2015,

http://www.sciencedirect.com/science/article/pii/S0734743X1400253X.

Jankowiak T., Rusinek A., Wood P., A numerical analysis of the dynamic behaviour of sheet steel perforated by a conical projectile under ballistic conditions, Finite Elements in Analysis and Design, 65: 39–49, 2013,

http://www.sciencedirect.com/science/article/pii/S0168874X12001989.

Jordan J.B., Naito C.J., An experimental investigation of the effect of nose shape on fragments penetrating GFRP, International Journal of Impact Engineering, 63: 63–71, 2014, http://www.sciencedirect.com/science/article/pii/S0734743X13001577.

Kelley S., Johnson G., Statistical testing of aircraft materials for transport airplane rotor burst fragment shielding, Report for U.S. Department of Transportation Federal Aviation Administration, Report no. DOT/FAA/AR-06/9, May 2006,

http://www.tc.faa.gov/its/worldpac/techrpt/AR06-9.pdf.

LS-DYNA Keyword User’s Manual, Vol. I–II, Livermore Software Technology Corporation (LSTC), 2013.

Rusinek A., Rodríguez-Martínez J.A., Arias A., Klepaczko J.R., López-Puente J., Influence of conical projectile diameter on perpendicular impact of thin steel plate, Engineering Fracture Mechanics, 75(10): 2946–2967, 2008,

http://www.sciencedirect.com/science/article/pii/S0013794408000143.

Rodríguez-Millán M., Vaz-Romero A., Rusinek A., Rodríguez-Martínez J.A., Arias A., Experimental study on the perforation process of 5754-H111 and 6082-T6 aluminium plates subjected to normal impact by conical, hemispherical and blunt projectiles, Experimental Mechanics, 54(5): 729–742, 2014,

http://link.springer.com/article/10.1007%2Fs11340-013-9829-z#/page-1.

Tiwari G., Iqbal M.A., Gupta P.K., Gupta N.K., The ballistic resistance of thin aluminium plates with varying degrees of fixity along the circumference, International Journal of Impact Engineering, 74: 46–56, December 2014,

http://www.sciencedirect.com/science/article/pii/S0734743X14000220.

Seidt J.D., Michael Pereira J., Gilat A., Revilock D.M., Nandwana K., Ballistic impact of anisotropic 2024 aluminum sheet and plate, International Journal of Impact Engineering, 62: 27–34, 2013,

http://www.sciencedirect.com/science/article/pii/S0734743X13001152.

Senthil K., Iqbal M.A., Effect of projectile diameter on ballistic resistance and failure mechanism of single and layered aluminum plates, Theoretical and Applied Fracture Mechanics, 66–67: 53–64, 2013,

http://www.sciencedirect.com/science/article/pii/S016784421300089X.

Woodward R.L., The interrelation of failure modes observed in the penetration of metallic targets, International Journal of Impact Engineering, 2(2): 121–129, 1984,

http://www.sciencedirect.com/science/article/pii/0734743X84900010.




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