Selected aspects of modelling a phenomena occurring with very large strain rates on the example of the shaped charge jet stream forming process and explosive formed projectiles

• Autorzy: Panowicz R. , Konarzewski M. , Borkowski J. , Milewski E.

Identyfikatory

DOI

10.5604/12314005.1166017

• Języki publikacji: EN

Abstrakty

EN

During the process of the shaped charge jet stream formation and creation of the explosive formed projectiles, we have to deal with strain rates reaching level of 107 1/s and strains larger than in other dynamic phenomena. Therefore, the correct numerical analyses of such problems are especially demanding, both in terms of preparation of the numerical model and time needed for obtaining the solution. For their execution, both meshfree and Euler description based computational methods are used. Due to very large deformations and associated with them numerical analyses errors, computational methods based on the Lagrange description are not used. Description of the materials behaviour has to take into account influence of the strain rate in wide range of parameters. In most cases, it is realized by using in computational analyses Johnson-Cook or Steiberg-Green constitutive models. These models provide an accurate description of the material parameters not only in the wide range of strain rates, but also in large scope of strains and temperatures. Article presents results of the numerical analyses concerning the influence of selected numerical and geometric parameters of the system on the process of shaped charge jet stream formation and creation of explosive formed projectile.

Słowa kluczowe

EN

charge jet; EFP; finite element method; Euler method

• 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: 2015
• Tom: Vol. 22, No. 3
• Strony: 187--192
• 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

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

Borkowski J.

• Military Institute of Armament Technology Wyszyńskiego Street 7, 05-220 Zielonka, Poland tel.: [phone], fax: [phone]

autor

Milewski E.

• Military Institute of Armament Technology Wyszyńskiego Street 7, 05-220 Zielonka, Poland tel.: [phone], fax: [phone]

Bibliografia

• [1] Jach, K. i in., Komputerowe modelowanie dynamicznych oddziaływań metodą punktów swobodnych, PWN, Warszawa 2001.
• [2] http://www.copybook.com/military/diehl-bgt-defence/articles/ammunition.
• [3] Hallquist, J. O., LS-DYNA Theory Manual, Livermore Software Technology Corporation, Livermore, CA, 2005.
• [4] Johnson, G. R., Cook, W. H., A constitutive model and data for metals subjected to large strains, high strain rates and high temperatures, 7th International Symposium on Ballistics, 1983.
• [5] 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.
• [6] Włodarczyk, E., Wstęp do mechaniki wybuchu, PWN, Warszawa 1994.
• [7] Panowicz, R., Barnat, W., Wpływ umiejscowienia ładunku wybuchowego na intensywność fali podmuchowej, Biuletyn WAT, Vol. 59, No. 1, 2010.
• [8] Meyers,M. A., Dynamic Behaviour of Materials, Johns Wiley & Sons, Inc., New York-Chichester-Brisbane-Toronto-Singapoure 1994.