双凹角蜂窝结构设计及其吸能特性研究  

Design of double reentrant angle honeycomb structure and research on its energy-absorption characteristics

作　　者：冯敏 FENG Min(Tianjin Survey and Design Institute for Water Transport Engineering Co.,Ltd.,Tianjin Research Institute for Water Transport Engineering,M.O.T,Tianjin 300450)

机构地区：[1]交通运输部天津水运工程科学研究院天津水运工程勘察设计院有限公司,天津300450

出　　处：《机械设计》2025年第3期56-62,共7页Journal of Machine Design

摘　　要：具有负泊松比效应的内凹蜂窝结构具有质量密度低、比强度高及吸能能力强等优点,在汽车防撞等领域有着重要作用。文中设计了一种双凹角拉胀蜂窝结构,并对其面内变形模式和能量吸收情况进行了有限元分析,来揭示该结构的耐撞性能。模型验证表明:预测结果与参考结果相似,随着冲击速度的增加,平台应力和吸能能力增加,且在中低速压缩过程中保持良好的负泊松比效应。此外,系统地研究了结构的角度和胞壁厚度在3种压缩速度下对吸能能力的影响,结果表明:通过减小角度和增大胞壁厚度可以提高结构的耐撞性能。The reentrant angle honeycomb structure with negative Poisson’s ratio effect has such advantages as low mass density,high specific strength and strong energy absorption,which plays an important role in automobile collision avoidance.In this article,a double re-entrant angle honeycomb structure is designed,and its out-of-plane deformation mode and energy absorption are analyzed with the help of the finite-element method,in order to reveal its collision resistance.The model has verified that the prediction results are fitted with the reference results.With the ever-growing impact velocity,the platform’s stress and energy-absorption capacity increase,and the negative Poisson’s ratio effect is maintained in the process of medium and low speed compression.In addition,the influence of the structure’s angle and cell wall thickness on its energy-absorption capacity at three compression speeds is systematically explored.The results show that the structure’s collision resistance improves by reducing its angle and increasing its cell wall thickness.

关 键 词：负泊松比 面内变形 蜂窝结构 吸能能力 

分 类 号：O347[理学—固体力学]