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

• Published in: 2018 16th International Conference on Megagauss Magnetic Field Generation and Related Topics (MEGAGAUSS) pp. 1 - 5
• Main Authors: Baranov, V.K., Duday, P.V., Golubinskiy, A.G., Glybin, A.M., Ivanovskiy, A.V., Irinitchev, D.A., Krayev, A.I., Kostyukov, S.A., Nadezhin, S.S., Tagirov, R.R., Zimenkov, A.A.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-09-2018
• Subjects: Beryllium; ejecta; Electromyography; explosive magnetic generators; Explosives; Lead; Loading; shear strength; spall; Strain; Surface waves; z-pinch
• DOI: 10.1109/MEGAGAUSS.2018.8722679

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 -10 4 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.