Solids

A method of studying the flow of miniature cumulative jet of copper

N. V. Melekhin, A. M. Bragov, N. N. Berendeev, V. N. Chuvil’deev, V. V. Balandin

National Research Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, Russia

Abstract: A novel experimental laboratory technique for the flow of miniature cumulative jet of copper and without using explosives, is described. To perform the microcumulative tests, miniature cylindrical specimens with conical pits were used. The dynamic loading of the specimens was performed using a gas gun with a striker accelerated up to speeds of 800 m/s. The optimal specimen geometry and testing regimes, including the focal distance during microcumulation testing, were then determined. The influence of the structural condition of the sample material on the parameters of the cumulative jet has been demonstrated A preliminary analysis of the effects of copper purity and processing regimes on the ultimate dynamic plasticity characteristics was performed.

Keywords: high-speed deformation, cumulative jet flow, copper, ultimate dynamic plasticity, light-gas gun.

Received: 05.05.2022
Revised: 13.07.2022
Accepted: 21.07.2022

DOI: 10.21883/JTF.2022.11.53440.122-22

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