Fracture of Metallic Ring Samples under Magnetic Pulse Shock Action
Metallic rings made of aluminum alloy are studied upon the application of a distributed radial load by a magnetic pulse technique. Two modifications of the magnetic pulse method were implemented on the basis of the GKVI-300 high voltage short pulse generator providing the formation of voltage pulses of 30-300 kV in amplitude. These two approaches making it possible to decrease the period of the harmonic load to 7,5μs and 1μs . Method to determine the instant of rupture of the ring from a flash arising at rupture with the help of a photo detector was developed and applied. Load signal and signal from the photo detector are displayed and saved with a digital oscilloscope. Fracture stress value was estimated. It increased on load time shortens. The surfaces of fracture of aluminum samples were investigated after the tests by optical microscope. It is shown, when the load time shortens, the ductile component of fracture declines and the samples fail in a more brittle manner.
Magnetic Pulse Technique Metallic Ring Samples Dynamic Loading
Viktor A.Morozov Yuriy V.Petrov Anton A.Lukin Viktor M.Kats Svetlana A.Atroshenko Georgii D.Fedorovskii
Saint-Petersburg state university,7-9,Universitetskaya nab.,St.Petersburg,199034,Russia
国际会议
北京
英文
1-8
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）