ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
This paper attempted to study the properties of Slapper detonator non-energetic elementsthrough exerting impact on them by Hopkinson Pressure Bar and evaluating the acceleration thatsamples received in accordance with one-dimensional stress wave theory. The results showed that thevelocity pulse width could be controlled and acceleration pulse width be improved by varying thepulse shaper material and strike bar length. And the critical acceleration causing the failure of theinitiator was closely connected with acceleration pulse width as well as acceleration amplitude. Whenthe strike bar length were 126 mm, 190 mm, 270 mm and 460 mm, the acceleration pulse width were58 μs, 93 μs, 130 μs and 160 μs, respectively, and the critical acceleration causing the failure of theinitiator were about 240 000 g, 130 000 g, 74 000 g and 72 000 g, respectively. The accurateness andreliability of acceleration value was accredited to the methods of changing sampling frequency,smoothing velocity and acceleration curve, and fitting curve. The FEM analog simulation was alsoconducted by using the LS-DYNA finite element program. Good agreements were achieved betweenthe acceleration curve and the simulation results
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.33-37.401.pdf
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