Dynamics analysis of aluminium alloy honeycomb core sandwich panels subjected to underwater shock loading

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (2) : 7-11.

REN Peng1,2，ZHANG Wei2，LIU Jian-hua1，HUANG Wei2

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Abstract

In the present study, the dynamic response and blast resistant properties of 5A06 aluminium alloy honeycomb core sandwich panels were investigated during impulsive loading in water. Underwater shock loading experiments for clamped aluminum alloy honeycomb core sandwich plates were conducted by the non-explosive underwater explosion shock loading device. Compared with the experimental results of monolithic panels with equivalent area mass, the effects of sandwich panel structures on anti-shock performance were studied by the experiments of underwater shock loading. The dynamic deformation of air back plate of sandwich structure was measured in real-time by the combined technique of high-speed cameras and 3D digital speckle correlation method (DIC). The dynamic response histories and failure modes of clamped air-back sandwich plates were observed to compare the blast resistant properties of aluminium alloy honeycomb plates with monolithic plates. Experimental results show that the blast resistant property of honeycomb structure plates effectively improved by core compressing than monolithic panels with equivalent area mass.

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solid mechanics / underwater shock wave / sandwich plate with honeycombs / blast resistant properties / digital image correlation

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REN Peng1,2，ZHANG Wei2，LIU Jian-hua1，HUANG Wei2. Dynamics analysis of aluminium alloy honeycomb core sandwich panels subjected to underwater shock loading[J]. Journal of Vibration and Shock, 2016, 35(2): 7-11

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