Investigation of Metal Dispersion under Shock-Wave Loading Caused by Pulses of Relativistic Electrons and Impactors Accelerated by Electric Explosion
E. V. Kosheleva, V. V. Mokhova, A. M. Podurets, V. T. Punin, N. I. Sel'chenkova, A. V. Til'kunov, M. I. Tkachenko, I. R. Trunin, A. I. Uchaev
Russian Federal Nuclear Center, Institute of Experimental Physics, Sarov, 607190 Russia
Keywords: ударно-волновое нагружение, динамическое разрушение, диспергирование металлов, спектр диссипативных структур, фрактальная размерность, показатель Хёрста, универсальные признаки, shock-wave loading, dynamic fracture, metal dispersion, spectrum of dissipative structures, fractal dimension, Hurst exponent, universal critera
Abstract
Depending on the geometry and amplitude-time characteristics of external impact, there may be cumulation of shock-wave energy in the samples, which reduces the time durind which the structural materials retain their functional properties. The dispersion of the free metal surface of samples without and with pre-applied disturbances in the form of pyramids. Under certain amplitude-time characteristics of the external impact, dispersion from the tops of pyramids occurs. The quantitative characteristics of dynamic destructive processes at different amplitude-time characteristics of the external impact are determined for the purpose of introducing them into two- and three-dimensional codes to predict the behavior of metals under extreme conditions.
|