NUMERICAL SIMULATION OF IMPACTS OF STEEL IMPACTORS AND ALUMINUM TARGETS AT A VELOCITY OF 6.2 KM/S USING SPH CODE OF LOGOS SOFTWARE PACKAGE
I. V. Kovalenko, N. A. Zhavoronkova, E. I. Lipenkova, Yu. N. Bukharev
VANT. Ser.: Mat. Mod. Fiz. Proc 2016. Вып.2. С. 59-65.
The paper describes several problems of a high-speed impact and presents results of the 3D simulation for these problems using the SPH code of LOGOS software package developed at FSUE "RFNC-VNIIEF" (Sarov, N.Novgorod region). The work objective was to obtain verification data for the conditions of interaction at a velocity of 6.2 km/s between a disc-shaped target made of aluminum alloy AMg-6 and an impactor (a sphere, or a disc) made of steel EP-637 by comparing results of simulations with the earlier published data of experiments and results of simulations using other codes. Stability of the numerical simulation results obtained for the problems of impacting an Al disk by a steel spherical impactor and their satisfactory agreement with the available experimental and earlier calculated data have been demonstrated. For the shock-wave phase of a planar impact of two discs, there have been found noticeable oscillations of pressure and mass velocity relative to the expected analytical values, which can be lowered, in particular, by optimizing the artificial viscosity parameters in the computational algorithm. Keywords: numerical simulation, high-speed impact, SPH code, LOGOS software package, impactor, target.
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