Introduction to numerical analysis of directed fragmentation warheads

• Autorzy: Panowicz R. , Nowak J. , Konarzewski M. , Niezgoda T.
• Języki publikacji: EN

Abstrakty

EN

The aim of the paper is to presents one of the possible approaches to the numerical analysis of the behaviour of directed fragmentation war heads. These kinds of warheads consists of: metallic or composite cover, explosive material and a driven and fragmentation liner. The explosives are initiated by a booster causes driving the liner in a few milliseconds up to about 900 m/s. The liner fragments into many parts during this intensive and dynamic load. The fragments move in a cone which dimensions depend on the warheads shape and mechanical parameters of others warheads parts. All of the warheads elements are selected to meet the assumed parameters. The fragments velocity, their mass or geometric dimensions and cone angle are the most important parameters of the warheads fragments. Such a warhead, in the initial phase of the liner driving can be numerically modelled in the field of the continuum damage mechanics. Such a description is presented in other papers. This approach in a further phase of driving cause the increases of inaccuracies. Therefore, this paper proposes the use of ALE and FSI approach to describe the behaviour of the fragmentation warheads. A three-dimensional numerical model of the directed fragmentation warheads was made in the MSC Patran, and the dynamic phenomena analysis used a nonlinear finite element method implemented in the LS-Dyna program.

Słowa kluczowe

EN

finite elements method; dynamic; directed fragmentation warheads

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2013
• Tom: Vol. 20, No. 4
• Strony: 319--325
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Panowicz R.

• Military University of Technology Department of Mechanics and Applied Computer Science Kaliskiego Street 2, 00-908 Warsaw, Poland tel.: [phone], fax: [phone]

autor

Nowak J.

• Military University of Technology Department of Mechanics and Applied Computer Science Kaliskiego Street 2, 00-908 Warsaw, Poland tel.: [phone], fax: [phone]

autor

Konarzewski M.

• Military University of Technology Department of Mechanics and Applied Computer Science Kaliskiego Street 2, 00-908 Warsaw, Poland tel.: [phone], fax: [phone]

autor

Niezgoda T.

• Military University of Technology Department of Mechanics and Applied Computer Science Kaliskiego Street 2, 00-908 Warsaw, Poland tel.: [phone], fax: [phone]

Bibliografia

• [1] Bdzil, J. B., Stewart, D. S., Jackson, T. L., Program Burn Algorithms Based on Detonation Shock Dynamics: Discrete Approximations of Detonation Flows with Discontinuous Front Models, Journal of Computational Physics, Vol. 174, pp. 870-902, 2001.
• [2] Hallquist, J. O., LS-DYNA Theory Manual, Livermore Software Technology Corporation, Livermore 2005.
• [3] Jach, K., Świerczyński, R., Wiśniewski, A., Computer Simulation of Explosively Propelling Metal Fragments by Protective Casing, Journal of Theoretical and Applied Mechanics, Vol. 42, pp. 125-138, 2004.
• [4] Jach, K., et al., Komputerowe modelowanie dynamicznych oddziaływań metodą punktów swobodnych, PWN, Warsaw 2001.
• [5] Kapila, A. K., Bdzil, J. B., Stewart, D. S., On the Structure and Accuracy of Programmed Burn, Combustion Theory and Modelling, Vol. 10, Is. 2, 2006.
• [6] Masahiko, O., Yamato, M., Kenji, M., Yukio, K., Shigeru, I., A Study on Shock Wahe Propagation Process in the Smooth Blasting Technique, 8th International LS-DYNA Conference, Detroit 2004.
• [7] Mazurkiewicz, Ł., Oddziaływanie impulsowe, WAT, Warsaw 2011.
• [8] Włodarczyk, E., Wstęp do mechaniki wybuchu, PWN, Warsaw 1994.