复合蛋盒型夹层结构动态压缩的力学性能研究  

Study on Dynamic Compression Properties of Egg-Box Sandwich Structure

作　　者：秦勤[1,2] 王建伟 刘星岩 郑林 Qin Qin;Wang Jianwei;Liu Xingyan;Zheng Lin(School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China;Shunde Graduate School,University of Science and Technology Beijing,Foshan 520300,China)

机构地区：[1]北京科技大学机械工程学院,北京100083 [2]北京科技大学顺德研究生院,广东佛山520300

出　　处：《稀有金属材料与工程》2021年第11期4103-4112,共10页Rare Metal Materials and Engineering

基　　金：北京科技大学顺德研究生院科技创新专项资金(BK19BE009);广东省基础与应用研究基金(2019B1515120070)。

摘　　要：蛋盒型结构是一种新型的周期性单胞轻质结构,该结构具有低密度、高比强度和吸能能力强等特性。本研究通过有限元法建立了平面蛋盒型夹芯板与曲面蛋盒型夹心板的落锤冲击模型,对比分析了其抗冲击特性,并且对不同条件下蛋盒型结构的动态压缩力学性能进行对比分析。结果表明:受到冲击时的夹芯板会经历3个阶段,其中压缩阶段为主要的吸能阶段,通过将冲击动能转变为夹芯板的塑性耗散能来达到缓冲吸能的目的,同时这些特性依赖于成形高度以及上下面板厚度等结构参数,单胞结构成形高度为6mm、单胞周期为20mm、上下面板板厚为0.5mm、曲率半径为400 mm时,复合蛋盒型夹芯板具有更好的力学性能。Egg-box structure is a new type of periodic single cell lightweight structure,which has the characteristics of low density,high specific strength and high energy absorption capacity.Drop hammer impact model of egg box type sandwich panels with a plane and curved surface was established based on finite element method in this research.A comparative analysis of its impact resistant properties,and the dynamic compression mechanical properties of different egg box type structure under different conditions were analyzed.The results show that the impact of sandwich board goes through three stages,including the compression stage as the main stage o f energy absorption,through the impact kinetic energy transforming into the sandwich board plastic dissipation to achieve the goal of buffer and energy absorption.At the same time,these characteristics depend on the forming height and the thickness of upper and lower panels and other structural parameters.When the forming height of single-cell structure is 6 mm,the period of single cell is 20 mm,the thickness of upper and lower panels is 0.5 mm,and the radius of curvature is 400 mm,the composite egg-box sandwich panel has better mechanical properties.

关 键 词：蛋盒型结构 复合夹芯板 动态压缩 抗冲击特性 

分 类 号：TG306[金属学及工艺—金属压力加工]