Experimental Study of Scale Effects on Shock Wave Interaction with a Granular Layer
Shock wave interaction with granular media has attracted great interest due to its relevance to many practical applications such as shock attenuation by granular filters  and powder densification and consolidation by shock waves . The primary concern of recent investigations on this phenomenon is the stress enhancement by a granular material placed on a solid wall, instead of expected stress damping. Suzuki and Adachi  observed that the propagation of a shock wave over a solid wall covered with a thin dust layer gave rise to a peak in pressure profiles measured under the dust layer. Gelfand et al.  also verified that when a granular layer covered the end-wall of a vertical shock tube, the pressure measured at the end-wall after headon collision of a shock wave with the granular layer temporally became larger than that without granular material. In order to understand the fundamental mechanism of the stress enhancement, numerous experimental works (–) have been carried out using vertical shock tubes similar to that used by Gelfand et al.
KeywordsShock Wave Granular Material Shock Tube Granular Layer Granular Medium
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