准静态压缩下"EPE/瓦楞纸板"缓冲系统能量吸收的研究
Energy Absorption of"EPE/Corrugated Cardboard"Cushioning System under Quasi-Static Compression
魏娜 1周云令 1陈志强 2王焱梅3
作者信息
- 1. 天津职业大学 包装与印刷工程学院,天津 300410
- 2. 中国包装科研测试中心,天津 300457
- 3. 天津丹盛包装有限公司,天津 300308
- 折叠
摘要
本研究主要探讨了发泡类材料与瓦楞纸板的共同缓冲作用.本研究将"EPE/瓦楞纸板"看作缓冲包装系统,并对其进行准静态压缩试验,得到材料的应力-应变曲线和能量吸收图,探究环境温度、EPE密度、EPE厚度对缓冲包装系统力学性能、能量吸收性能的影响.在应变为0.6时,组合缓冲系统(EPE_3、EPE_5)标准化能量(W/Es)吸收分别为0.2266、0.2024,较对照组EPE(W/Es=0.1835)增加了23.5%、10.3%;应变为0.6时,随着温度由-20℃增加至23℃、40℃,EPE_3吸收的标准化能量明显减小,EPE_3吸收的能量分别减少17.7%、20.9%,而EPE_5吸收的能量分别减少11.8%、19.9%;在上述应变状态下,EPE密度为24g/cm3的试样组合缓冲系统(EPE_3、EPE_5)具有最高的标准化能量吸收,分别为0.1916、0.1745;EPE厚度为30mm、40mm、50mm的组合材料(EPE_3、EPE_5)能量吸收曲线(W/Es-ε)重合度较高.瓦楞纸板在组合缓冲系统(EPE_3、EPE_5)中的缓冲作用不可被忽略;温度升高,组合缓冲系统的能量吸收会减少;EPE密度对组合缓冲系统力学性能有影响且存在"阈值效应".EPE厚度对组合缓冲系统的力学性能影响不显著,增加EPE厚度会导致能量吸收曲线(W/Es-σ/Es)趋于平滑,使得最佳吸能点难以辨识.
Abstract
The collaborative cushioning effect of foam materials and corrugated cardboard was explored in this study.The concept of regarding"EPE/corrugated cardboard"as cushioning packaging system was proposed.The stress-strain curves and energy-absorption diagrams was obtained by quasi-static compression test.The impact of temperature,EPE densities and EPE thicknesses on mechanical and energy-absorption properties of cushioning packaging system was investigated.Under the strain of 0.6,the normalized energy(W/Es)absorption of the combined buffer systems(EPE_3,EPE_5)were 0.2266 and 0.2024,respectively,which increased by 23.5%and 10.3%compared with the control group EPE(W/Es=0.1835).When the strain was 0.6,as the temperature increased from-20℃to 23℃and 40℃,the normalized energy absorbed by EPE_3 decreased significantly.The energy absorbed by EPE_3 decreased by 17.7%and 20.9%,respectively,while the energy absorbed by EPE_5 decreased by 11.8%and 19.9%,respectively.Under the above strain state,the sample combination buffer systems(EPE_3,EPE_5)with an EPE density of 24g/cm3 had the highest normalized energy absorption,which were 0.1916 and 0.1745,respectively.The coincidence degree of energy absorption curves(W/Es-ε)of composite materials(EPE_3,EPE_5)with EPE thickness of 30mm,40mm and 50mm had a high degree of coincidence.The results showed that the buffer effect of corrugated cardboard in the cushioning systems(EPE_3,EPE_5)cannot be ignored.The energy-absorption of cushioning packaging systems will decrease when the temperature increases.EPE density has an effect on the mechanical properties of the combined buffer systems and has a"threshold effect".The EPE thickness has no significant effect on the mechanical properties of the cushioning systems.The energy absorption curve(W/Es-σ/Es)will smooth when EPE thickness increase,and the optimal energy-absorption point becomes difficult to identify.
关键词
准静态压缩/组合缓冲系统/应力-应变曲线/能量吸收图Key words
Quasi-Static compression/Combined cushioning system/Stress-strain curve/Energy-absorption diagram引用本文复制引用
出版年
2024
NETL
NSTL
万方数据