Abstract
The dynamic responses of the liquid-filled hemispherical shell structures under axial impact loading were studied through impact experiments and numerical simulations. At first, the deformation mode and impact forces were obtained by the experimental research. The ironing areas and fluted areas were observed on the edge zone of the liquid-filled single-layer shell. Next the dynamic behaviors of liquid-filled sandwich shell under axial impact loading were investigated numerically. The simulation results were found to match well with those obtained from experiments. It was found that since the filled liquid transfers and disperses the impact load, the stress of shells and the water pressure is going to be distributed uniformly as the impact processes and due to the low compressibility, the filled liquid absorbs small energy. Then effect of liquid radial thickness, wall thickness and impact velocity on dynamic responses of the liquid-filled sandwich shell was discussed.
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