Experimental and computer analyses of impact penetration of a steel rod into heavy plates of steel and aluminum alloys
Wybrane pełne teksty z tego czasopisma
In the paper some results of experimental and numerical analysis concerning penetration of a steel rod (with conical and flat-faced heads) into heavy high-strength steel and AMg6, Al-Zn-Mg and D16 aluminum alloys plates are presented. The calculations are conducted for relatively low velocities of penetration (200--1000 m/s), so the hydrodynamic component of the pressure on the contact surface is much lower than the strength of the material with allowance for viscosity effects. In most variants, the strains in the rod are assumed to be elastic for revealing effects of viscosity of the plate material. The resistance to penetration at its initial stages (prior to the rod plastic flow and fracture) is found to be determined by the dynamic strength of the plate material, its viscous component (proportional to the plastic strain rate) prevailing at the impact velocities of up to 500 m/s. From the experimental analysis it follows that the depth of penetration varies with the velocity, and it is conditioned by wave processes in the plate, their scale being dependent on its thickness. Such experimental results are in agreement with results of computer simulation of the initial stage of rigid rod penetration in plates of limited thickness.
Bibliogr. 12 poz., rys., tab., wykr.
- 1. A.M. RAJENDRAN, Penetration of tungsten alloy into shallow-cavity steel targets, Int. J. Impact Engng., 6, 21, 451–460, 1998.
- 2. R.C. BATRA, Steady state penetration of thermoviscoplastic targets, Computational Mechanics, 1, 3, 1–12, 1998.
- 3. C.E. ANDERSON, S.A. MULLIN, C.J. KUHLMAN, Computer simulation of strain-rate effects in replica scale model penetration experiments, lnt. J. Impact Engng., 1, 13, 35–52, 1993.
- 4. M.J. FORRESTAL, and V.K. LUK, Dynamic spherical cavity-expansion in a compressible elastic-plastic solid, J. Appl. Mech., 55, 2, 275–279, 1988.
- 5. G.V. STEPANOY and V.V. KHARCHENKO, The influence of dynamic material behaviour on long rod penetration at elevated velocities, Problems of Strength, 4, 39–51, 1998.
- 6. V.V. ASTANIN, SH. U. GALEV and K.B. IVASHCHENKO, Specific features of deformation and fracture of aluminum targets interacting with a steel penetrator along the normal, Probl. Prochn., 12, 52–58, 1988.
- 7. G.V. STEPANOV, Elastic-plastic deformation and fracture of materials under impulsive loading (in Russian), Naukoya Dumka, Kiev 1991.
- 8. G.V. STEPANOV, V.. ZUBOV, High-rate dynamic compression of high-strength steel and titanium alloy (in Ukrainian), [in:] Naukovi Visti, NTUU "KPI", 6, 76–81, 2000.
- 9. V.V. KHARCHENKO, Simulation of high strain-rate of metals with account of viscoplastic effects (in Russian), LOGOS, Kiev 1999.
- 10. G.V. STEPANOY, A.A. AVETOV, A.M. ULCHENKO, Impulse of forces at rupture of targets with a steel penetrator, Probl. Prochn., 9, 57–59, 1986.
- 11. V.V. KHARCHENKO, Rigid rod penetration in viscoplastic media (in Russian), [in:] Dynamic Strength and Fracture Toughness of Structural Materials, 52–56, Kiev 1989.
- 12. G.V. STEPANOV, V.V. KHARCHENKO, L. KRUSZKA, Analysis of the aluminum alloy resistance to the penetration of a steel rod at velocities up to 500 m/s, Proceedings of the XV International Scientific-Technological Conference on Environmental Engineering in Maintenance of Military Complexes, 10–12 October, Military University of Technology, 2, 372–380, Zakopane 2001.