聚乙烯泡沫单填充纸瓦楞管的轴向跌落冲击缓冲吸能特性

Cushioning energy absorption of polyethylene foam single-filled paper corrugation tubes under axial drop impact

利用聚乙烯闭孔泡沫单填充纸瓦楞管开展轴向跌落冲击试验,对比分析了结构参数和冲击参数对其缓冲吸能特性参数(比吸能、行程利用率、压缩力效率、比总体效率)的影响。结果表明,X向单填充管的动态缓冲吸能特性优于Y向单填充管,而静态缓冲吸能特性差于Y向单填充管。正四边形单填充管的动态缓冲吸能特性优于正五、六边形单填充管,X向正四边形单填充管的比吸能相较于正五、六边形管分别提高了114.4%和182.3%。对于跌落冲击压缩,单填充管的比吸能、行程利用率、比总体效率随着管长比的增大而减小,管长比为1.4的X向单填充管的比吸能相较于管长比为2.2和3.0的单填充管分别增加了45.8%和117.9%,而压缩力效率随着管长比的增大而增大。随着跌落冲击质量或冲击能量的增加,比吸能、行程利用率、压缩力效率和比总体效率皆呈增大趋势,冲击质量对X向单填充管的影响较大,而冲击速度则对Y向单填充管的影响较大。

This paper investigated comparatively the effect of structural parameters(tube direction,tube cross-section shape,tube length ratio)and impact parameters(impact mass,impact energy)on the cushioning energy absorption characteristics(specific energy absorption,stroke efficiency,crush force efficiency,specific total efficiency)of the polyethylene closed-foam single-filling paper corrugation tubes by axial drop impact tests.The results show that the single-filled X-direction tubes hold better dynamic cushioning energy absorption than the single-filled Y-direction tubes,but weaker static cushioning energy absorption than the single-filled Y-direction tubes.The regular quadrilateral single-filled tubes have superior dynamic cushioning energy absorption to the regular pentagonal and hexagonal single-filled tubes,e.g.the regular quadrilateral singlefilled X-direction tubes can respectively increase the specific energy absorption by 114.4%and 182.3%for those with tube cross-section shape of regular pentagon and hexagon.During the drop impact process the specific energy absorption,stroke efficiency and specific total efficiency of the single-filled tubes decrease with the increase of tube length ratio,e.g.the singlefilled X-direction tube with the tube length ratio of 1.4 can respectively increase the specific energy absorption by 45.8%and 117.9%for those with tube length ratio of 2.2 and 3.0,moreover the crush force efficiency increases as the tube length ratio increases.The characteristics of dynamic cushioning energy absorption increase with the increase of drop impact mass or impact energy,and the single-filled X-direction tube is greatly controlled by the mass of impact block,while the single-filled Ydirection tube is obviously affected by the velocity of drop impact.