JI Mei-juan, GUO Yan-feng, FU Yun-gang, HAN Xu-xiang, KANG Jian-fen, WEI Qing. STUDY ON DROP IMPACT CUSHIONING PERFORMANCE OF PAPER CORRUGATED-HONEYCOMB COMPOSITE SANDWICH STRUCTURE[J]. Engineering Mechanics, 2020, 37(10): 247-256. DOI: 10.6052/j.issn.1000-4750.2019.11.0668
Citation: JI Mei-juan, GUO Yan-feng, FU Yun-gang, HAN Xu-xiang, KANG Jian-fen, WEI Qing. STUDY ON DROP IMPACT CUSHIONING PERFORMANCE OF PAPER CORRUGATED-HONEYCOMB COMPOSITE SANDWICH STRUCTURE[J]. Engineering Mechanics, 2020, 37(10): 247-256. DOI: 10.6052/j.issn.1000-4750.2019.11.0668

STUDY ON DROP IMPACT CUSHIONING PERFORMANCE OF PAPER CORRUGATED-HONEYCOMB COMPOSITE SANDWICH STRUCTURE

  • Aiming at the cushioning and protection performance of the composite sandwich structure of paper corrugated and paper honeycomb under the condition of drop impact dynamic compression, the effects of paper honeycomb thickness on the impact acceleration response, on deformation characteristics and cushioning energy absorption characteristics of single-sided and double-sided composite forms were studied. The studying results show that, the corrugation layer gets crushed first, then the honeycomb layer, moreover larger honeycomb thickness will cause the secondary collapse of the paper honeycomb core layer. Under the same impact energy or mass, the cushioning energy absorbing characteristics of single-sided composite layered structures with the same honeycomb thickness are better than those of the double-sided composite layered structures, and the impact resistance of double-sided composite layered structures is better than that of the single-sided structures. For the composite layered structures with the honeycomb thicknesses of 10 mm, 15 mm, 20 mm, and 25 mm, the increase of honeycomb thickness decreases the cushioning energy absorption of the structure under low energy of drop impact, while the increase of honeycomb thickness reinforces the energy absorption capacity under the high energy of drop impact. The specific energy absorption, unit volume energy absorption and stroke utilization of the composite sandwich structure with paper honeycomb thickness of 10 mm, 15 mm, 20 mm and 25 mm are 1~3 times higher than that of the composite sandwich structure with honeycomb thickness of 70 mm. The paper honeycomb with lower thickness is more beneficial to the cushioning energy absorption of the composite sandwich structure.
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