Penetration Evaluation of Explosively Formed Projectiles Through Air and Water Using Insensitive Munition: Simulative and Experimental Studies
Abstract
The process of formation, flying, penetration of explosively-formed projectiles (EFP) and the effect of water on performance of the charge for underwater applications is simulated by Ansysis Autodyn 2D-Hydro code. The main objective of an explosively formed projectile designed for underwater applications is to disintegrate the target at longer standoff distances. In this paper we have simulated the explosively formed projectile from OFHC-Copper liner for 1200 conical angle. The Affect of water on the penetration of EFP is determined by simulations from Ansysis Autodyn 2-D Hydrocode and by varying depth of water from 1CD-5CD. The depth of penetration against steel target is measured experimentally. Flash X-Ray Radiography (FXR) is used to capture EFP jet formation and its penetration against target is measured by depth of penetration experiments. Simulation results are compared with experimental results. The difference in simulated and experimental results for depth of penetration is about 7 mm, which lies within favorable range of error. The jet formation captured from FXR is quite clear and jet velocity determined from Flash X-ray radiography is the same as the ones obtained by using other high explosives. Therefore, it is indicated that Insensitive Munition (8701) can be utilized instead of Polymer Bonded Explosives (PBX) for air and underwater environments with great reliability and without any hazard.
Keywords:
Explosively Formed Projectiles, Liner, Jet formation, Jet Penetration, Depth of PenetrationDownloads
References
T. H. Bouet, P. Tarayre, J. P. Guillon, “Study of a multi-point ignition EFP”, 15th International Symposium on Ballistics, pp. 159-166, Israel, 1995
D. Bender, B. Chhouk, R. Fong, B. Rice, E. Volkmann, “Explosively formed penetrators (EFP) with canted fins”, 19th International Symposium on Ballistics, pp. 755-761, Switzerland, 2001
C. Yu, Q. D. Dong, C. W. Sun, Y. J. Tong, C. L. Yan, F. B. Li, “The experimental studies of explosively formed projectile with star shaped tail”, Explosive Shock Waves, Vol. 23, No. 6, pp. 561-564, 2003
J. Carleone, D. Bender, “A unique method of providing an explosively formed projectile with fins”, 17th International Symposium on Ballistics, pp. 55–62, Midrand, South Africa, 1998
W. Jun, L. Jingbo, D. Yixin, “Experimental and numerical study on the flight and penetration properties of explosively-formed projectile”, International Journal of Impact Engineering, Vol. 34, pp. 1147–1162, 2007 DOI: https://doi.org/10.1016/j.ijimpeng.2006.06.007
C. Yu, T. Yanjin, Y. Chengli, F. Li, Y. Gui, Z. Ming, W. Bingren, X. Panhai, L. Li, “Applied research of shaped charge technology”, International Journal of Impact Engineering, Vol. 23, No. 1, pp. 981-988, 1999 DOI: https://doi.org/10.1016/S0734-743X(99)00140-2
Downloads
How to Cite
License
Authors who publish with this journal agree to the following terms:
- Authors retain the copyright and grant the journal the right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) after its publication in ETASR with an acknowledgement of its initial publication in this journal.
