几类曲壁蜂窝结构的关联机制及力学特性  

The Correlation Mechanism and Mechanical Properties of Several Curved Honeycombs

作　　者：何一鸣 张君华 

机构地区：[1]北京信息科技大学机电工程学院,北京

出　　处：《力学研究》2024年第4期154-166,共13页International Journal of Mechanics Research

基　　金：国家自然科学基金(12272057)和河北省自然科学基金(A2023202041)资助。

摘　　要：近年来蜂窝结构因其独特的力学性能引起了众多研究者的兴趣,蜂窝结构在航空航天、车辆和工程防护等领域具有非常广阔的应用前景。蜂窝胞元为直壁时,受力容易出现应力集中,而曲壁蜂窝可以有效地缓解应力集中问题。文章研究了四种曲壁蜂窝结构,即圆形孔蜂窝、椭圆形孔蜂窝、花生形孔蜂窝以及四手性蜂窝的内在关联。揭示了此类蜂窝结构的能量吸收机制,部分能量是通过蜂窝胞元旋转吸收的,而且胞元旋转产生了负泊松比。得出椭圆形孔蜂窝、花生形孔蜂窝以及四手性蜂窝这三类结构可以通过调节蜂窝胞元的几何参数实现相互转化。通过理论推导计算出四手性蜂窝的等效力学参数并与有限元进行对比以验证其正确性。3D打印试验模型、有限元模型的计算结果和文献进行了对比,在此基础上研究了这几类蜂窝结构的力学特性,包括力–位移曲线、泊松比和杨氏模量等。比较了三种曲壁蜂窝结构分别在相同孔隙率下和蜂窝壁厚最小处相同时的力学特性。文章所获得结果将为曲壁蜂窝结构的轻量化设计和在工程领域的广泛应用提供理论依据。In recent years, honeycomb structures have attracted the interest of many researchers due to their unique mechanical properties and have very broad application prospects in aerospace, vehicle, and engineering protection fields. The straight-walled honeycomb is prone to stress concentration after being stressed, while curved walled honeycomb can effectively alleviate the problem of stress concentration. In this paper, the intrinsic correlation mechanism of four curved wall honeycomb structures, namely circular hole honeycomb, oval hole honeycomb, peanut-shaped hole honeycomb, and four-chiral honeycomb, is studied. The energy absorption mechanism of these honeycomb structures is revealed. Namely, part of the energy is absorbed by the rotation of the honeycomb cell, and the rotation of

关 键 词：曲壁蜂窝 负泊松比 四手性蜂窝 轻量化 能量吸收 

分 类 号：TN9[电子电信—信息与通信工程]