Development of Electromagnetic Ring Expansion Apparatus for High-Strain-Rate Test
The structure of the experimental set-up for electromagnetic ring expansion and its electric properties are presented in the paper. While earlier expanding ring apparatuses were usually equipped with shaped-charge, thyratron or ignitron switches, we propose to use the impulse high-voltage thyritor as a switch to discharge capacitor bank. Furthermore, the preliminary results of the copper ring fragmentation properties are presented for different initial charge of capacitor bank (0,5 ÷ 2 kV). On the basis of our calculated and preliminary experimental data of the ring motion for expansion at 2 kV, we estimated the radial ring velocity, which was close to 250 m/s.
Zdzislaw Gosiewski and Zbigniew Kulesza
J. Janiszewski and W. Pichola, "Development of Electromagnetic Ring Expansion Apparatus for High-Strain-Rate Test", Solid State Phenomena, Vols. 147-149, pp. 645-650, 2009