泡沫和橡胶组合层状结构静态吸能性能研究  

Static Buffering Energy Absorption Performance of Foam and Rubber Composite Lamellar Structures

作　　者：宋云雪[1] 闫义伟 SONG Yun-xue;YAN Yi-wei(College of Aeronautical Engineering,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学航空工程学院,天津300300

出　　处：《包装工程》2023年第5期255-261,共7页Packaging Engineering

摘　　要：目的提出一种新型的泡沫和橡胶组合层状吸能结构,通过仿真对比分析该结构静态压缩特性和缓冲性能。方法采用发泡聚苯乙烯(EPS)、三元乙丙橡胶(EPDM)2种材料,以3种不同厚度比(1∶3、1∶1、3∶1)、2种叠置顺序进行组合构建层状结构,应用LS-DYNA进行组合层状结构静态压缩变形特性、吸能特性分析,并与2种材料单独压缩时的特性作了对比。结果2种材料相互组合的层状结构静态压缩力学特性、吸能能力与叠置顺序无关,与2种材料的厚度比有关。组合层状结构的承载能力、总吸能和平台应力均优于单一EPS的;组合层状的比吸能优于单一EPDM的,比单一EPS的差,是单一EPS比吸能的1/60~1/20。能量吸收率在不同应力水平存在差异,调整EPS或EPDM子层厚度占比可提高组合层状结构的缓冲效率。结论EPS和EPDM 2种材料相互组合的层状结构具有较大的结构承载能力和吸能优势,可为抗冲击的缓冲系统设计提供新思路和参考价值。The work aims to propose a new type of foam and rubber composite lamellar energy absorption structure and analyze its static compression characteristics and buffering performance by simulation.The structure was composed of expandable polystyrene(EPS)and ethylene propylene diene monomer(EPDM)with three different thickness ratios(1∶3,1∶1,3∶1)and two kinds of stacking order.The results of its static compression deformation characteristics and energy absorption capacity were analyzed by LS-DYNA and compared with those of the two materials compressed separately.Both static compression deformation characteristics and energy absorption capacity of the two materials were unrelated to the stacking order,but only to the thickness ratio of the materials.Its bearing capacity,total energy absorption and platform stress were higher than single EPS,but the value of its specific energy absorption was between two single materials.It was 1/60-1/20 of that of single EPS.The buffering efficiency of composite lamellar structures varied at different stress levels,which could be improved by changing the proportion of EPS or EPDM sublayer thickness.The lamellar structure combining EPS and EPDM has certain advantages of bearing capacity and energy absorption,which provides a new idea and reference value for the design of buffer system against impact.

关 键 词：发泡聚苯乙烯 三元乙丙橡胶 组合层状结构 静态压缩 吸能性能 

分 类 号：TB484.3[一般工业技术—包装工程]