Application of Explosive Magnetic Generators to Study Dynamic Properties of Materials under Shock-Wave Loading

摘要

In recent years, the method of driving the liner with a magnetic field in a classical Z-pinch scheme has been intensively developed by the world research laboratories. The application of this method with the use of a liner as a cylindrical impactor opens up wide possibilities for studying the dynamic properties of materials under conditions of shock-wave axisymmetric loading. The paper presents the studies of the dynamic properties of various materials in the liner experiments using a helical EMG equipped with an explosive switch as a source of pulsed power. The setup and results of a series of experiments investigating the shear strength of beryllium in the strain rate range of 10^{3-104 s-1 are described. A comparative analysis of applicability of various computational models for a description of the deformation process in axisymmetric geometry has been performed. The results of experiments studying the lead “ejecta” process under conditions of shock-wave loading are presented. The numerical simulation has determined the influence of the ejecta-forming surface profile on the velocity and distribution of particles in a dust cloud by varying the amplitude of the shock wave in the range of 15-40 GPa.}