Development of Electromagnetic Ring Expansion Apparatus for High-Strain-Rate Test

Jacek Janiszewski; Wiesław Pichola

doi:10.4028/www.scientific.net/SSP.147-149.645

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HomeSolid State PhenomenaSolid State Phenomena Vols. 147-149Development of Electromagnetic Ring Expansion...

Development of Electromagnetic Ring Expansion Apparatus for High-Strain-Rate Test

Abstract:

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.