Simulation of hyper-velocity impact on double honeycomb sandwich panel and its staggered improvement with internal-structure model
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The double honeycomb sandwich panel, which was formed by inserting an intermediate facesheet into single honeycomb core, showed better capability than single honeycomb panel in shielding hyper-velocity impact from space debris. Shielding structures with double honeycomb cores are thoroughly investigated with material point method and point-based internal-structure model. The front honeycomb core and the rear honeycomb core are staggered to obtain better shielding effect. It is found that staggered double honeycomb cores can fragment the debris and lessen impact threats much more than original double honeycomb cores. The sizes of the holes on the rear facesheet are greatly reduced, and the panels are not perforated for some impact velocities. Staggered double honeycomb panels can be adopted as novel effective shielding structures for hyper-velocity impacts.
KeywordsDouble honeycomb cores Hyper-velocity impact Material point method Internal-structure model Energy absorption
Supported by National Natural Science Foundation of China (Grant No. 11472153) and Beijing Higher Education Young Elite Teacher Project (No. YETP0111).
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