Initiation of High Explosive Charges by High Speed Compact Projectiles with Conical Head Part

The article describes the results of numerical simulation of interaction between compact projectiles having a conical head part with different expansion angles and explosives cased in steel shells with the thickness of 5 mm and equipped with composition B. We determined the critical shock initiation velocities under the action of the projectile having the conical shape of the head part with the corners at the apex of 30, 45, 60, and 90° when interacting with explosive charges in a 5 mm thick shell and the value of the form factor for the projectiles with a conical head part. Findings of the research show that compact projectiles with a conical head part have less initiation capability, as their influence results in the formation of the compressive waves with a smooth pressure rise profile

References

[1] Orlenko L.P., red. Fizika vzryva. V 2 t. T. 1 [Physics of explosion. In 2 vols. Vol. 1]. Moscow, Fizmatlit Publ., 2004. 823 p.

[2] Kolpakov V.I., Baskakov V.D., Kalugin V.T., Shikunov N.V., Sofin A.S. Rational shape assessment of super-extended destructive agents of explosively formed projectile. Izvestiya rossiyskoy akademii raketnykh i artilleriyskikh nauk., 2012, no. 71, pp. 70–74 (in Russ.).

[3] Kobylkin I.F., Selivanov V.V. Vozbuzhdenie i rasprostranenie vzryvnykh prevrashcheniy v zaryadakh vzryvchatykh veshchestv [Excitation and expansion of explosive transformation in explosive charges]. Moscow, Bauman MSTU Publ., 2015. 354 p.

[4] Bahl K.L., Vantine H.C., Weingart R.C. The shock initiation of bare and covered explosive by projectile impact. The 7th Symp. (Intern.) on Detonation. Annapolis (Maryland, USA), 1981. Pp. 358–368.

[5] Kobylkin I.F., Pavlova I.A. Shock initiation of cased explosives by a high-speed striker with warhead of different forms. Vestn. Mosk. Gos. Tekh. Univ. im. N.E. Baumana, Mashinostr. [Herald of the Bauman Moscow State Tech. Univ., Mech. Eng.], 2017, no. 3, pp. 54–65 (in Russ.). DOI: 10.18698/0236-3941-2017-3-54-65

[6] Lloyd R.M. Physics of direct hit and near miss warhead technology. Ser. Progress in astronautics and aeronautics. Vol. 194. AIAA, 2001. 416 p.

[7] Dobratz B.M., Crawford P.C. Properties of chemical explosives and explosive simulants. University of California, Livermore, LLNL, 1985.

[8] McClennan S., Ripley R.C., Pelletier P. The effect of bullet design on insensitive munitions bullet impact test results. 27th Int. Symp. on Ballistics. Freiburg, Germany, 2013. Pp. 1656–1667.

[9] Laurence W., Starkenberg J., Krzewinski B. Secondary effect on projectile-impact shock initiation. 13th Int. Symp. on Detonation, 2006. Pp. 0822–0830.

[10] Kobylkin I.F., Petyukov A.V., Yakovenko I.A. The projectile impact initiation of the cased high explosive charges. Inzhenernyy zhurnal: nauka i innovatsii [Engineering Journal: Science and Innovation], 2015, no. 3 (in Russ.). DOI: 10.18698/2308-6033-2015-3-1377 Available at: http://engjournal.ru/catalog/mech/mlgp/1377.html