Experimental and numerical studies on penetration of shaped charge into concrete and pebble layered targets

C Wang, W Xu, T Li

Abstract


Experiments on penetrating into concrete and pebble layered targets were performed by shaped charge with different cone angles, liner wall thicknesses, length to diameter ratios and charge diameters at different standoffs. Based on the experimental data, the influence of shaped charge’s structural parameters on crater diameter, hole diameter, crater depth and penetration depth was analyzed in detail. Meanwhile, formation and penetration processes of all shaped charges were simulated by AUTODYN software for investigating the more intrinsic mechanisms, in which the numerical models are the same as those set up in the experiments. The results obtained in this paper indicate that there are obvious differences between jetting projectile charge (JPC) and explosively formed projectile (EFP) in penetrating into multi-layer targets. For the same charge diameter, the values of hole diameter formed by EFP were much larger than JPC. However, for the same standoff, the penetration depth caused by JCP were larger than EFP. The interfacial effect exists in the penetration progress of JPC.


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References


Birkhoff, G., et al., Explosives with lined cavities. Journal of Applied Physics, 1948. 19(6): p. 563-582. Crossref

Allison, F. E., and Vitali, R., A new method of computing penetration variables for shaped charge jets. Army Ballistic Research Lab Aberdeen Proving Ground MD, No. BRL-1184, 1963.

Tate, A., A theory for the deceleration of long rods after impact. Journal of the Mechanics and Physics of Solids, 1967. 15(6): p. 387-399. Crossref

Tate, A., Long rod penetration models—Part II Extensions to the hydrodynamic theory of penetration. International Journal of mechanical sciences, 1986. 28(9): p. 599-612. Crossref

Chou, P.C., and Foster, J.C., Theory of penetration by jet of non-liner velocity and in layered targets. In Proceedings of the 10th International Symposium on Ballistics, California, 1987.

Szendrei, T., Analytical model of crater formation by jet impact and its application to calculation of penetration curves and holes profiles. In Proceedings of the 7th International Symposium on Ballistics, Netherlands, 1983.

Held, M., Verification of the equation for radial crater growth by shaped charge jet penetration. International journal of impact engineering, 1995. 17(1-3): p. 387-398. Crossref

Wang, J., Wang, C., and Ning, J.G., Theoretical model for shaped charge jets penetration and cavity radius calculation. Engineering Mechanics, 2009, 26(4): p. 21-26.

Meyer, C S., Numerical Investigation of Impact Condition Effects on Concrete Penetration. Dynamic Behavior of Materials, 2015. 1: p. 285-293. Crossref

Resnyansky, A. D., and Weckert, S., A., Damage of Two Concrete Materials due to Enhanced Shaped Charges. Dynamic Behavior of Materials, 2015. 1: p. 267-277. Crossref

Nicolaides, D., et al., Experimental field investigation of impact and blast load resistance of Ultra High Performance Fibre Reinforced Cementitious Composites (UHPFRCCs). Construction and Building Materials, 2015. 95: p. 566-574. Crossref

Pincosy, P.A., and Murphy, M.J., Calculated concrete target damage by multiple rod impact and penetration. In Proceedings of the 23rd International Symposium on Ballistics, Spain, 2007.

Xiao, Q. Q., et al., Penetration research of jacketed jet into concrete. International Journal of Impact Engineering, 2013. 54: p. 246-253. Crossref

Wang, C., Wang, W.J., and Ning, J.G., Investigation on shaped charge penetrating into concrete targets. Chinese Journal of Theoretical and Applied Mechanics, 2015. 47(4): p. 672-686. Crossref




DOI: http://dx.doi.org/10.21152/1750-9548.11.3.295

Copyright (c) 2017 C Wang, W Xu, T Li

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