Effects of Shell on Bore center Annular Shaped Charges Formation and Penetrating into Steel Targets
Annular shaped charge can efficiently create large penetration diameter, which can solve the problem of small penetration diameter of a traditional shaped charge, and thus meeting the requirements of large penetration diameter in some specific situations. In this paper, the influence of five kinds shell structures, i.e. no shell, aluminum shell with thickness of 2.0 mm and steel shell with thickness of 2.0 mm, 3.0 mm and 4.0 mm, on bore-center annular shaped charges (BCASCs) formation and penetrating steel targets was investigated by numerical simulations and experiments. The numerical simulation results are in good agreement with the experimental results. The results showed that, from no shell to aluminum shell of 2.0 mm and then to steel shell of 2.0 mm, 3.0 mm and 4.0 mm for BCASCs, the diameter and radial velocity of projectile head decrease, the axial velocity of BCASC projectiles increases gradually, the penetration diameter of the targets decreases, and the penetration depth increases. The penetration diameter caused by the BCASC with no shell is the largest, being 116.0 mm (1.16D), D is the charge diameter. The penetration depth caused by the BCASC with steel shell of 4.0 mm thickness is the deepest, being 76.4 mm (0.76D).
Wang, C.; Ding, J.X. & Zhao, H.T. Numerical simulation on jet formation of shaped charge with different liner materials. Def. Sci. J., 2015, 65(4), 279-286. https://doi.org/10.14429/dsj.65.8648
Wang, C.; Xu, W.L. & yuen, S.C.K. Penetration of shaped charge into layered and spaced concrete targets. Int. J. Impact Eng., 2018, 112, 193-206. https://doi.org/10.1016/j.ijimpeng.2017.10.013
Leidel, D.J. A design study of an annular-jet charge for explosive cutting. Drexel university, 1978. PhD Thesis.
Xu, W.L.; Wang, C. & Xu, B. Investigation of new type annular shaped charge formation mechanism. Trans. Beijing Inst. Technol., 2018, 38(6), 572-578 (Chinese). https://doi.org/10.15918/j.tbit 1001-0645.2018.06.004
Cable, A.J. High-impact phenomena. Edited by Kinslow, Academic Press, New york, USA, 1970. pp. 1-18.
Minin,V.F.; Minin, I.V. & Minin, O.V. Principle of the forced jet formation. In Workshop air defense lethality enhancements and high velocity terminal ballistics: freiburg, Germany, 1998.
Minin,V.F.; Minin, I.V. & Minin, O.V. Calculation experiment technology, computational fluid dynamics technologies and applications. Edited by Igor Minin, In Techopen, 2011. pp. 1-28.
Minin,V.F.; Minin, I.V. & Minin, O.V. Some possibilities of hypercumulative regime of jet formations. Appl. Mech. Mater., 2015, 782, 42-48. https://doi.org/10.4028/www.scientific.net/AMM.782.42
Minin,V.F.; Minin, I.V. & Minin, O.V. Hypervelocity fragment formation technology for ground-based laboratory tests. Acta Astronaut., 2014, 104(1), 77-83. https://doi.org/10.1016/j.actaastro.2014.07.027
Wang, C.; Huang, F. & Ning, J. Jet formation and penetration mechanism of W typed shaped charge. Acta Mech. Sinica, 2009, 25(1), 107-120. https://doi.org/10.1007/s10409-008-0212-8
Minin, I.V. & Minin, O. V. Explosive pulsed plasma antennas for information protection. In Advanced Microwave and Millimeter Wave Technologies Semiconductor Devices Circuits and Systems, Edited by Moumita Mukherjee, In Tech, 2010. pp. 13-34.
Rondot, F.A. Computational parametric study on cookie-cutter projectiles. In 29th International Symposium on Ballistics: Edinburgh, Scotland, UK, 2016.
Grace, F. & Barnard, M. Tubular and reconstituted jets using annular shaped charge liners. In 30th International Symposium on Ballistics: Long beach, CA, USA, 2017.
Innovative defense super caliber charges. http://innovativedefense.net/super-caliber-charges.php (Accessed on 22 May 2019).
Xu, W.L.; Wang, C. & Chen, D.P. Formation of a bore-center annular shaped charge and its penetration into steel targets. Int. J. Impact Eng., 2019, 127, 122-134. https://doi.org/10.1016/j.ijimpeng.2019.01.008
AUTODYN material library, ANSYS R17.2, ANSYS Inc., 2016.
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