Effective elastic modulus and energy absorption performance evaluations of a novel re-entrant chiral hybrid honeycomb OA  

作　　者：Youjiang CUI Zhihui XU Que ZHOU Baolin WANG Kaifa WANG Biao WANG 

机构地区：[1]Research Institute of Interdisciplinary Science,Dongguan University of Technology,Dongguan 523808,Guangdong Province,China [2]Graduate School at Shenzhen,Harbin Institute of Technology,Harbin 150001,China

出　　处：《Applied Mathematics and Mechanics(English Edition)》2025年第5期781-794,共14页应用数学和力学(英文版)

基　　金：Project supported by Guangdong Basic and Applied Basic Research Foundation(Nos.2022A1515240072,2023A1515240053,2022B1515020099,and 2023A1515012641);Shenzhen Science and Technology Program(No.JCYJ20220818102409020);the National Natural Science Foundation of China(Nos.12102104 and 12002180)。

摘　　要：Re-entrant honeycombs are widely used in safeguard structures due to their geometric simplicity and excellent energy absorption capacities.However,traditional re-entrant honeycombs exhibit insufficient stiffness and stability owing to the lack of internal support.This paper proposes a new hybrid honeycomb by integrating a chiral component inside the re-entrant honeycomb.Since Young's modulus is a key parameter to evaluate the energy absorption performance and stiffness,an analytical model is given to predict the effective Young's modulus of the proposed hybrid honeycomb.It is found that the optimal design scheme is to directly insert a circular ring inside the re-entrant honeycomb.The normalized specific energy absorption(SEA)of the hybrid honeycomb is 95%larger than that of the traditional re-entrant honeycomb.The normalized SEA first increases to a peak value and then decreases with the cell wall thickness.The optimal thickness of the cell wall for the maximum SEA is derived in terms of the geometric configuration of the unit cell.The normalized SEA first decreases to a valley value and then increases with the re-entrant angle.A longer horizontal cell wall results in a smaller normalized SEA.This paper provides a new design method for safeguard structures with high stiffness and energy absorption performance.

关 键 词：re-entrant honeycomb chiral metamaterial effective Young’s modulus energy absorption performance 

分 类 号：O341[理学—固体力学]