Three-dimensional computer model of explosive forming of projectiles

• Autorzy: Jach, K. , Owsik, J. , Świerczyński, R.
• Języki publikacji: EN

Abstrakty

EN

The paper presents a new three-dimensional variant of free particles method, used for modelling of explosive formation of projectiles and exemplary results of computer simulations. Physical model is based on gas-dynamics equations (interaction of detonation products with the charge elements) and mechanics of solids (deformation and driving of metal liner and housing). The equations of the problem were solved numerically using the free particles method together with the so-called markers method, allowing for modelling boundary conditions at the contacts of media having various physical properties and any complex shapes. Significant virtue of the markers method was shown, i.e., the possibility of full automation of a calculation process, even for very complex and dynamically changing boundary conditions, e.g., during projectiles fragmentation. Many test solutions have been obtained and analysed, having in view the influence of three-dimensional effects on projectiles fragmentation and rotation. These aspects of explosive forming of projectiles were indicated which can be investigated using only 3D codes, e.g., errors and inaccuracies of metal liners manufacturing, forming of projectile fins, etc.

Słowa kluczowe

PL

tłoczenie wybuchowe; symulacja komputerowa; rozprysk pocisku; metoda numeryczna; mechanika wybuchu

EN

explosive forming; explosively formed projectile; three dimensional; computer simulation; projectile fragmentation; free particles method; markers method; numerical method; explosive mechanics

• Czasopismo: Journal of Technical Physics
• Rocznik: 2007
• Tom: Vol. 48, no 2
• Strony: 77-94
• Opis fizyczny: Bibliogr. 28 poz., rys.

Twórcy

autor

Jach, K.

autor

Owsik, J.

autor

Świerczyński, R.

• Military University of Technology, Institute of Optoelectronics, Kaliskiego 2, 00-908 Warszawa 49,

Bibliografia

• 1. M. HELD, Die projektilbildenden Ladungen, 3rd International Symposium on Ballistics, Karlsruhe, 1977.
• 2. K. WEIMANN, Research and development in the area of explosive formed projectiles charge technology, Propellants, Explosives, Pyrotechnics, 18, 1993.
• 3. E. MILEWSKI, Experimental-theoretical optimisation of the charges for explosively formed projectiles [in Polish], Doctor dissertation, WAT, Warszawa 1998.
• 4. M. HELD, Testing the precision initiation couplers, Propellants, Explosives, Pyrotechnics, 19, 1994.
• 5. Z. JOPEK, J. SZYMAŃSKI, E. WŁODARCZYK, New generation of antitank ammunition [in Polish], WPT, 1999.
• 6. K. JACH, Computer modelling of cumulation phenomena [in Polish], WAT, Warszawa 1990.
• 7. K. JACH, E. WŁODARCZYK, R. ŚWIERCZYŃSKI, Computer simulation of the processes of formation of a shaped charge jet and penetration of the latter into an armour plate, J. Tech. Phys., 34, 4, 1993.
• 8. K. JACH, E. WŁODARCZYK, R. ŚWIERCZYŃSKI, Computer simulation of the process of shaped charge jet formation and its penetration into armour, at 14th Int. Ballistics Symposium and Exhibitions, Montreal, Kanada, 1993.
• 9. K. JACH, M. MROCZKOWSKI, R. ŚWIERCZYŃSKI, E. WŁODARCZYK, Numerical simulation of dynamical effects in solids and gases, Proc. II Int. Conf. Large Particle Method Moscow, Russia,
• 10. K. JACH, Experimental-theoretical investigations of the systems for explosively formed projectiles, 3rd Scient.-Techn. Conf. Problems of development, production and exploitation of armament technology.
• 11. K. JACH, M. MROCZKOWSKI, R. ŚWIERCZYŃSKI, Numerical simulation of shaped charge jet interaction with multilayered target, 19-th International Symposium on Ballistics, Interlaken, Switzerland, 7-11 may 2001.
• 12. K. JACH, A. MORKA, M. MROCZKOWSKI, R. PANOWICZ, A. SARZYŃSKI, W. STEĘPNIEWSKI, R. ŚWIERCZYŃSKI, J. TYL, Computer modelling of dynamic interaction of bodies using free particles method [in Polish], Wydawnictwo Naukowe PWN, Warszawa 2001.
• 13. K. JACH, R. ŚWIERCZYŃSKI, Z. WILK, Modelling of perforation process of wellbore pipes of geological wells using shaped charges, Journal of Technical Physics, 45, 1, 31-54, 2004.
• 14. K. JACH, R. ŚWIERCZYŃSKI, A. WISNIEWSKI, Computer simulation of catching of explosively propelling metal fragments by protective casing, Journal of Theoretical and Applied Mechanics, 42, 1, 2004.
• 15. T.J. HOLMQUIST, G.R. JOHNSON, Determination of constants and comparison of results for various constitutive models, Journal de Physique III, 1, 1991.
• 16. J.F. ZERELLI, R.W. ARMSTRONG, Dislocation - mechanics - based constitutive relations for materials dynamic calculations, J. Appl. Phys., 61, 5, 1987.
• 17. J.D. WALKER, S.A. MULLIN, P.A. Cox, Oblique penetration: dynamic plasticity modelling and experimental data, 13-th International Symposium on Ballistics, Stockholm 1992.
• 18. M.J. MURPHY, Constitutive model parameter determination from generic EFP warhead tests, Journal de Physique III, 4, 1994.
• 19. P.O. CHURCH, I. CULLIS, Development and application of high strain rate constitutive models in hydrocodes, Journal de Physique III, 1, 1991.
• 20. B.D. GOLDTHORPE, Constitutive equations for annealed and explosively shocked iron for application to high strain rates and large strains, Journal de Physique III, 1, 1991.
• 21. M.L. WILKINS, Modelling the behaviour of materials, Structural impact and crashworthiness, London and New York 1984.
• 22. D.J. STEINBERG, C.M. LUND, A constitutive model for strain rates from 104 to 106 s~1, J. Appl. Phys., 65, 1528, 1989.
• 23. D.J. STEINBERG, S.G. COCHRAN, M.W. GUINAN, A constitutive model for metals applicable at . rate, J. Appl. Phys., 51, 3, 1980.
• 24. V.A. AGUREJKIN, S.I. ANISIMOV, A.V. BUSMAN, G.I. KANEL, V.P. KARJAGIN, A.B. KONSTANTINOV, B.P. KRJUKOV, V.F. MININ, S.V. RAZORENOV, R.Z. SAGDEEV, S.G. SUGAK V.E. FORTOV, Teplofiziceskie i gazodinamiceskie problemy protivometeoritnoj zascity kosmiceskogo apparata „Vega”, Teplofizika Vysokih Temperatur, 22, 5, 1984.
• 25. G.I. KANEL, V.E. FORTOV, Mehaniceskie svoistva kondensirovannyh sred pri intensivnyh impulsnyh vozdejstviah, Uspehi mehaniki, 10, 3, 1987.
• 26. S.G. SUGAK, G.I. KANEL, V.E. FORTOV, A.L. Ni, B.G. STELMAH, Cislennoe modelirovanie dejstvia vzryva na zeleznuju plitu, FGV, 19, 20, 1983.
• 27. E. WŁODARCZYK, The bases of detonation, WAT, Warszawa 1995.
• 28. K. JACH, R. ŚWIERCZYŃSKI, Construction of new generation of 3D methods and computer code, used for investigation of phenomena of driving and deformation of explosively formed projectile, [in Polish], IOE MUT Report No 18/IOE/2006, Warszawa, June 2006.