Transactions of Materials and Heat Treatment

Title：Research on in-plane impact performance for negative Poisson′s ratio honeycomb structure with square function curved edge

Authors： Xu Fengxiang1 2 Guan Yijie1 2 Zou Zhen1 2 Liu Yanxiong1 2 Wu Lei3 Tu Fan3

Unit： 1.Hubei Key Laboratory of Advanced Technology of Automotive Components Wuhan University of Technology 2. Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology 3. Wuhan Huaxia Fineblanking Technology Co. Ltd.

KeyWords： square function curved edge negative Poisson′s ratio honeycomb structure in-plane impact performance dynamic response energy absorption

ClassificationCode：O347

year,vol(issue):pagenumber：2022,47(12):212-220

Abstract：

Based on the traditional concave hexagonal honeycomb structure, a negative Poisson′s ratio honeycomb structure with square function curved edge was proposed. Then, the relationship between square function curved edge coefficient and its equivalent Poisson′s ratio was studied, and when the Poisson′s ratio was negative, the range of square function curved edge coefficient was determined. Furthermore, the influence laws of impact velocity on the deformation mode and the dynamic response of square function curved-edge honeycomb structure were revealed by using the finite element method, and the energy absorption of honeycomb structure was analyzed. The research results show that the configuration of introducing the square function curved edge has a relatively good negative Poisson′s ratio effect, and its equivalent Poisson′s ratio has a certain linear relationship with the coefficient of square function curved edge. The influence of impact velocity on the stress at the impact end of structure is greater than that at the fixed end. When the impact is at medium and high speeds, the vibration amplitude of platform area for the square function curved edge structure also increases significantly. At the same time, this configuration also has better energy absorption characteristics than the inner hexagon configuration. With the increasing of impact velocity, the energy absorption characteristics of the structure are also significantly enhanced.

Funds：

国家自然科学基金资助项目（51975438）；高等学校学科创新引智计划（B17034）

徐峰祥（1985-），男，博士，副教授 E-mail：xufx@whut.edu.cn 通信作者：刘艳雄（1985-），男，博士，副教授 E-mail： liuyx@whut.edu.cn

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