规则排列下凹五边形蜂窝阵列结构的异面缓冲性能研究  

Out-of-plane Cushioning Performance of Regularly Arranged Concave Pentagonal Honeycomb Array Structures

作　　者：谭思可 赵伟[1,2,3] 李莹欣 刘迪 苏亭亭[1,2,3] 李国志 孙德强 TAN Si-ke;ZHAO Wei;LI Ying-xin;LIU Di;SU Ting-ting;LI Guo-zhi;SUN De-qiang(Shaanxi University of Science and Technology,Xi'an 710021,China;Key Lab of Functional Printing and Transport Packaging of China National Light Industry,Xi'an 710021,China;National Demonstration Center for Experimental Light Chemistry Engineering Education,Xi'an 710021,China)

机构地区：[1]陕西科技大学,西安710021 [2]中国轻工业功能印刷与运输包装重点实验室,西安710021 [3]轻化工程国家级实验教学示范中心,西安710021

出　　处：《包装工程》2023年第21期78-85,共8页Packaging Engineering

基　　金：国家自然科学基金(515735327);陕西省教育厅重点实验室及基地项目(1616JS014)。

摘　　要：目的研究主要结构参数对规则排列凹五边形蜂窝阵列结构异面缓冲性能的影响。方法借助Ansys Workbench/LS-DYNA软件建立该蜂窝结构异面缓冲性能的有限元模型进行仿真模拟,研究不同凹陷角、壁厚边长比对其异面平台应力、变形模式和单位体积能量吸收的影响。结果在不同的压缩速度下,凹五边形蜂窝阵列结构表现出不同的变形模式。相对密度一定时,凹陷角度在0<θ<63.435°时,该结构异面平台应力和单位体积吸收能量都随凹陷角的增大先增后减,且在25°~35°时平台应力最大,20°~30°时单位体积吸收能量最大;当达到最大凹陷角度θ=63.435°时平台应力和单位体积吸收能量都出现再次增大的现象。在凹陷角一定时,异面平台应力和单位体积吸收能随壁厚边长增大而增大,且呈指数函数关系。结论基于有限元计算结果,总结出了规则排列的凹五边形蜂窝阵列结构在不同速度下的变形模式,以及凹陷角度、壁厚边长比对蜂窝异面平台应力、单位体积能量吸收的影响规律。The work aims to investigate the effect of major structural parameters on the out-of-plane cushioning performance of regularly arranged concave pentagonal honeycomb array structures.A finite element model of the out-of-plane cushioning performance of the honeycomb structure was developed with the help of Ansys Workbench/LS-DYNA software for simulation,and the effects of different depression angles,wall-thickness-side-length ratios on the stress,deformation mode,and energy absorption per unit volume of the out-of-plane plateau stress were investigated.The concave pentagonal honeycomb array structure exhibited different deformation mode at different compression velocities.When the relative density was certain and the depression angle was 0<θ<63.435°,the out-of-plane plateau stress and energy absorption per unit volume of the structure decreased first and then increased with the increase of the depression angle,in which the plateau stress was the largest at the depression angle of 25°~35°,and the energy absorption per unit volume was the largest at the depression angle of 20°~30°,and the maximum depression angle of θ=63.435°showed the phenomenon of increasing again in both plateau stress and energy absorption per unit volume.At a certain depression angle,the larger the wall-thickness-side-length ratio,the larger the out-of-plane plateau stress and energy absorption per unit volume of the structure,both of which showed exponential relations.Based on the finite element calculation results,the deformation mode of concave pentagonal honeycomb array structure at different velocities,as well as the effect law of the depression angle and wall-thickness-side-length ratio on the out-of-plane plateau stress of the concave pentagonal honeycomb,and the energy absorption per unit volume are summarized.

关 键 词：凹五边形蜂窝 异面 有限元分析 变形模式 平台应力 单位体积能量吸收 

分 类 号：TB485.1[一般工业技术—包装工程]