Dynamic Copper and Polyethylene Strengths in Shockless Loading to 15 GPA According to the Data of Explosive Magnetic Experiments with Cylindrical Three-Layer Liner Systems

Results and Prospects of Material Strength Studies on Electrophysical Facilities Based on Perturbation Growth in Liner Systems

“…These experiments sought to validate the concept of using state-of-the-art electrophysical facilities to study dynamic strength properties of materials based on the perturbation growth in cylindrical liner systems. The preliminary analysis [6,7] of experimental data confirmed the possibility to use such liner systems for strength studies of high-density (copper) and low-density (polyethylene) materials. The experimental three-layer Al-CH 2-Cu (RHSR-1) and Al-H2O-Cu (RHSR-2) liner systems with a current carrying aluminum piston liner (Fig.…”

“…Magnetically imploded cylindrical liners can be used to study dynamic shear strength properties of materials based on the growth of initial perturbations during the RayleighTaylor instability development in liner systems [1][2][3][4][5][6][7]. High-current capacitor banks (Pegasus-2, Shiva Star, Atlas, peak currents I max = 6 y 30 MA) and disc explosive magnetic generators (DEMGs, I max = 20 y 70 MA) are capable of driving cylindrical liner systems to a wide range of material pressures from~1 GPa [2,3] to hundreds of GPa [5].…”

“…High-current capacitor banks (Pegasus-2, Shiva Star, Atlas, peak currents I max = 6 y 30 MA) and disc explosive magnetic generators (DEMGs, I max = 20 y 70 MA) are capable of driving cylindrical liner systems to a wide range of material pressures from~1 GPa [2,3] to hundreds of GPa [5]. Numerical simulations of the experimental perturbation growth make it possible to test different dynamic strength models [3,7].…”

“…1, left) of rapidly growing perturbation amplitudes in the liners. At VNIIEF, such simulations are performed with a 1D (MHD) n code developed on the basis of the UP technique [8] and 1D MHD approximation to simulate different pulse power systems and loads [2][3][4][5][6][7]9]. Such simulations use prior 2D simulation data.…”

“…Below are given the results of refined simulations (as against [7]) of experiments ( Fig. 1, Section 1) and similar (Section 2) liner systems to study material strength properties under quasi-isentropic compression in DEMG and ATLAS experiments.…”