Upstream jetting phenomenon in planar shock wave experiments with ceramic powders |
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Authors: | Y B Gu S Zhuang M Vural A Molinari G Ravichandran |
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Institution: | (1) AWE, Aldermaston, Reading, RG7 4PR, United Kingdom;(2) MST-8, Los Alamos National Laboratory, Los Alamos, NM 87545, USA |
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Abstract: | Jetting along upstream impact direction was observed in the experiments that were designed to study the response of ceramic
powder materials to planar shock loading generated by impact. The jet formed catastrophically above certain impact stress
level at the center of the impacted area and perforated upstream metal cover and flyer plates. Experiments were conducted
with different impact stress levels, powder particle sizes, and geometrical parameters. Consistently repeatable results were
obtained and effects arising from particle size, initial porosity, impact stress, and reflected wave were assessed. A simple
mechanism-based model is used to explain the formation of the jet and estimate the jet velocity. |
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Keywords: | |
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