The initial velocity of a metal plate explosively-launched from an open-faced sandwich (OFS)

• Autorzy: Włodarczyk E. , Fikus B.
• Języki publikacji: EN

Abstrakty

EN

Using analytic solutions for one-dimensional plane boundary value problems related to the launching of solids by detonation products (DPs) of high explosives, algebraic formulae which define the displacement and velocity of a metal plate launched by expanding DPs from an openfaced sandwich (OFS) are derived. In addition, the variations of the mechanical parameters of displacement, velocity and density versus the Lagrangian coordinate of expanding DPs gases during the launching of the metal plate from the OFS are defined. Variations of these mechanical parameters are also described by algebraic formulae. From analysis of the obtained results, it follows that Gurney’s assumptions of the linear velocity profile of constant – density DPs gases significantly deviates from conventional theory of gas dynamics. Gurney’s assumptions introduce a serious error of estimated metal plate velocity (about several dozen percent).

Słowa kluczowe

EN

metal launching; Gurney formula; gas dynamics; open-faced sandwich

PL

dynamika gazu; płyta metalowa; materiał wybuchowy; model Gurneya

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Engineering Transactions
• Rocznik: 2016
• Tom: Vol. 64, iss. 3
• Strony: 287--300
• Opis fizyczny: Bibliogr. 16 poz., rys., tab., wykr.

Twórcy

autor

Włodarczyk E.

• Faculty of Mechatronics and Aerospace Military University of Technology S. Kaliskiego 2, 00-908 Warszawa, Poland

autor

Fikus B.

• Faculty of Mechatronics and Aerospace Military University of Technology S. Kaliskiego 2, 00-908 Warszawa, Poland

Bibliografia

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• 4. Henry J.G., The Gurney formula and related approximations for the high-explosive deployment of fragments, Hughes Aircraft Company, Culver City, CA, Report No. PUB-189, April (AD 813398), 1967.
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• 7. Kennedy J.E., Gurney energy of explosives: estimation of the velocity and impulse imparted to driven metal, Sandia National Laboratories, Report No. SC-RR-70-790, December 1970.
• 8. Włodarczyk E., On hydrodynamic stationary theory of jet formation, Journal of Technical Physics, 35(3): 241–252, 1994.
• 9. Włodarczyk E., The impact of direction and velocity of the detonation wave and the liner apex angle on parameters of a shaped charge jet and slug as well as an explosively formed penetrator, Journal of Technical Physics, 35(4): 393–413, 1994.
• 10. Włodarczyk E., Influence of casing and liner inertia of wedge cumulative war-head on displacement velocity of their explosively driven elements, and on active mass of explosive, Journal of Technical Physics, 43(1): 19–33, 2002.
• 11. Włodarczyk E., Fundamentals of explosion mechanics [in Polish], WN PWN, Warszawa, 1994.
• 12. Cook M.A., The science of high explosives, Reinhold Publ. Corp., London, 1958.
• 13. Ficket W., Davis W.C., Detonation, University of California Press, Berkeley, 1979.
• 14. Cheret R., Detonation of condensed explosives, Springer-Verlag, New York, 1993.
• 15. Włodarczyk E., The backward launching of solids by products of detonation, Journal of Technical Physics, 41(2): 101–119, 2000.
• 16. Włodarczyk E., The closed form solution of the Darboux boundary value problem for backward driving of solids by the high explosive, Journal of Technical Physics, 42(1): 5–21, 2001.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.