Analysis of Possibility of Increase in Penetration Depth into Metal Targets of Projectiles with Energy Release Filler

Authors: Fedorov S.V., Fedorova N.A. Published: 09.02.2018
Published in issue: #1(118)/2018  

DOI: 10.18698/0236-3941-2018-1-110-130

Category: Mechanics | Chapter: Mechanics of Deformable Solid Body  
Keywords: projectile, metal target, penetration depth, reactive material, energy release, charging chamber

The article provides the analysis of the possibility of increase in projectile penetration depth into metal targets at interaction velocities about 1000 m/s due to placement of reactive material filler in the projectile. The analysis is made on the basis of developed calculation model. We suppose that reactive material chemical transformation happens at a certain stage of penetration with energy release and emergence of strongly compressed gaseous products of reaction. As a result, a back part of the projectile is rejected in the direction opposite to the direction of its movement, and a forward part receives a recoil momentum in the direction of penetration. The force of metal target resistance is calculated with the use of empirical dependence for mechanical stresses on the surface of contact of a projectile head part and a target. Moreover, we accept the assumption that chemical transformation of reactive material happens instantly and products of reaction are ideal gas with adiabatic index k = 3. The article shows that it is possible to hope for the increase in penetration depth in case of prevention of considerable radial expansion of chamber walls with reaction products. For this purpose it is necessary that energy release happened after deepening of chamber with reactive filler in the cavity which is formed in a target lower than the level of a target front surface


[1] Ames R.G. A standardized evaluation technique for reactive warhead fragments. Proc. of the 23rd Int. Symp. on Ballistics. Tarragona, Spain. 2007, vol. 1, pp. 49–58.

[2] Imkhovik N.A., Selivanov V.V., Simonov A.K., Sergeeva A.I., Yashin B.V. About the abroad development research of new "High-Density Reactive Materials" and its appliance in high-lethality ammunition. Vooruzhenie i ekonomika [Armament and Economics], 2014, no. 1 (26), pp. 53–63 (in Russ.). Available at: http://www.viek.ru/26/53-63.pdf

[3] Yashin V.B., Alekseev V.V., Khodyrev S.P. The explosive parameters of the tnt charges containing blocks of high-density metal-ptfe compositions. Inzhenernyy zhurnal: nauka i innovatsii [Engineering Journal: Science and Innovation], 2013, no. 1 (13) (in Russ.). DOI: 10.18698/2308-6033-2013-1-566 Available at: http://engjournal.ru/catalog/machin/blasting/566.html

[4] Selivanov V.V., Imkhovik N.A., Lashkov V.N., Selezenev A.A. Research on process of physical-chemical disrupture of PTFE and PTFE-metal composition under chemical and shock-wave exposure. Khimicheskaya fizika, 2001, vol. 20, no. 8, pp. 80–85 (in Russ.).

[5] Fedorov S.V., Bayanova Ya.M. Penetration of long strikers under hydrodynamic conditions with allowance for the material compressibility. Technical Physics. The Russian Journal of Applied Physics, 2011, vol. 56, no. 9, pp. 1266-1271. DOI 10.1134/S1063784211090088 Available at: https://link.springer.com/article/10.1134/S1063784211090088

[6] Rosenberg Z., Dekel E. On the role of material properties in the terminal ballistics of long rods. International Journal of Impact Engineering, 2004, vol. 30, no. 7, pp. 835–851. DOI: 10.1016/j.ijimpeng.2004.03.007 Available at: https://www.sciencedirect.com/science/article/pii/S0734743X0400048X

[7] Fedorov S.V., Veldanov V.A., Smirnov V.E. Influence numerical analysis of velocity and strength of high density alloy elongated projectiles on their penetration depth into the steel target. Vestn. Mosk. Gos. Tekh. Univ. im. N.E. Baumana, Mashinostr. [Herald of the Bauman Moscow State Tech. Univ., Mechan. Eng.], 2015, no. 1, pp. 65–83 (in Russ.). DOI: 10.18698/0236-3941-2015-1-65-83

[8] Weihrauch G., Wollmann E. Segmented penetrators. Propellants, Explosives, Pyrotechnics, 1993, vol. 18, no. 5, pp. 270–274. DOI: 10.1002/prep.19930180507 Available at: http://onlinelibrary.wiley.com/doi/10.1002/prep.19930180507/full

[9] Orphal D.L., Franzen R.R. Penetration mechanics and performance of segmented rods against metal targets. International Journal of Impact Engineering, 1990, vol. 10, no. 1-4, pp. 427–438. DOI: 10.1016/0734-743X(90)90077-9 Available at: https://www.sciencedirect.com/science/article/pii/0734743X90900779

[10] Fedorov S.V., Veldanov V.A., Gladkov N.A., Smirnov V.E. Numerical analysis of penetration of segmented and telescopic projectiles of high density alloy into the steel target. Vestn. Mosk. Gos. Tekh. Univ. im. N.E. Baumana, Mashinostr. [Herald of the Bauman Moscow State Tech. Univ., Mechan. Eng.], 2016, no. 3, pp. 100–117 (in Russ.). DOI: 10.18698/0236-3941-2016-3-100-117

[11] Fedorov S.V., Veldanov V.A. Application of segmented strikers for cavern formation in soil and rocky obstacles. Izvestiya RARAN, 2012, no. 1 (71), pp. 43−50 (in Russ.).

[12] Anderson C.E., Subramanian R., Walker J.D., Normandia M.J., Sharron T.R. Penetration mechanics of seg-tel penetrators. International Journal of Impact Engineering, 1997, vol. 20, no. 1-5, pp. 13–26. DOI: 10.1016/S0734-743X(97)87477-5 Available at: https://www.sciencedirect.com/science/article/pii/S0734743X97874775

[13] Westerling L., Lundberg R., Holmberg L., Lundberg V. High velocity penetration of homogeneous, segmented and telescopic projectiles into alumina targets. International Journal of Impact Engineering, 1997, vol. 20, no. 6-10, pp. 817–827. DOI: 10.1016/S0734-743X(97)87467-2 Available at: https://www.sciencedirect.com/science/article/pii/S0734743X97874672

[14] Fedorov S.V. On the penetration depth of a porous striker moving with a hypersonic velocity. Technical Physics. The Russian Journal of Applied Physics, 2007, vol. 52, no. 10, pp. 1379–1382. DOI: 10.1134/S1063784207100234 Available at: https://link.springer.com/article/10.1134/S1063784207100234

[15] Fedorov S.V., Babkin A.V., Veldanov V.A., Gladkov N.A., Ladov. S.V. High-velocity penetration of porous material rods. Vestn. Mosk. Gos. Tekh. Univ. im. N.E. Baumana, Estestv. Nauki [Herald of the Bauman Moscow State Tech. Univ., Nat. Sci.], 2016, no. 5, pp. 18–32 (in Russ.). DOI: 10.18698/1812-3368-2016-5-18-32

[16] Orlenko L.P., red. Fizika vzryva. V 2-kh t. T. 1 [Explosion physics. In 2 vols. Vol. 1]. Moscow, Fizmatlit Publ., 832 p.

[17] Ben-Dor G., Dubinsky A., Elperin T. Engineering models of high speed penetration into geological shields. Central European Journal of Engineering, 2014, vol. 4, no. 1, pp. 1–19. DOI: 10.2478/s13531-013-0135-4 Available at: https://link.springer.com/article/10.2478/s13531-013-0135-4

[18] Veldanov V.A., Fedorov S.V. Soil behavior at the interface with a rigid projectile during penetration. Journal of Applied Mechanics and Technical Physics, 2005, vol. 46, no. 6, pp. 867–875. DOI: 10.1007/s10808-005-0146-x Available at: https://link.springer.com/article/10.1007/s10808-005-0146-x

[19] Fedorov S.V., Fedorova N.A., Veldanov V.A. Jet thrust impulse using for increase in depth of research modules penetration into low-strength soil targets. Izvestiya RARAN, 2014, no. 4 (84), pp. 53–63 (in Russ.).

[20] Orlenko L.P. red., Fizika vzryva. V 2kh t. T. 2. [Explosion physics. In 2 vols. Vol. 2]. Moscow, Fizmatlit Publ., 2004. 656 p.

[21] Ben-Dor G., Dubinsky A., Elperin T. Optimization of penetration into geological and concrete shields by impactor with jet thruster. Journal of Mechanics of Materials and Structures, 2008, vol. 3, no. 4, pp. 707–727.

[22] Fedorov S.V., Fedorova N.A. Influence of the soil and rocky target strength properties on projectiles penetration depth with additional action of the jet thrust impulse. Vestn. Mosk. Gos. Tekh. Univ. im. N.E. Baumana, Mashinostr. [Herald of the Bauman Moscow State Tech. Univ., Mechan. Eng.], 2016, no. 4, pp. 40–56 (in Russ.). DOI: 10.18698/0236-3941-2017-5-28-40

[23] Veldanov V.A., Markov V.A., Pusev V.I. Study of dynamical mechanical properties of aluminum alloys by method of accelerometry. Vestn. Mosk. Gos. Tekh. Univ. im. N.E. Baumana, Mashinostr. [Herald of the Bauman Moscow State Tech. Univ., Mechan. Eng.], 2010, no. 2, pp. 37–46.

[24] Veldanov V.A., Markov V.A., Pusev V.I. Computation of nondeformable striker penetration into low-strength obstacles using piezoelectric accelerometry data. Technical Physics. The Russian Journal of Applied Physics, 2011, vol. 56, no. 7, pp. 992–1002 (in Russ.). DOI: 10.18698/0236-3941-2017-5-28-40 Available at: https://link.springer.com/article/10.1134/S1063784211070231