Modeling active adjustment of negative Poisson's ratio mechanical metamaterials

被引：0
|
作者：
Yao Y. [1 ]
Cong L. [1 ]
Wang H. [2 ]
Wang J. [1 ]
机构：
[1] Institute of Composite Materials and Structures, Harbin Institute of Technology, Harbin
[2] Inner Mongolia Dynamic and Mechanical Institute, Hohhot
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2024年 / 41卷 / 01期
基金：
中国国家自然科学基金;
关键词：
adjustable design; energy absorption; finite element simulation; mechanical metamaterials; negative Poisson's ratio;
D O I：
10.13801/j.cnki.fhclxb.20230516.001
中图分类号：
学科分类号：
摘要：
As a new type of metamaterials, negative Poisson's ratio materials have great potential application prospects in aerospace, aviation, industry, medical science and other fields due to its excellent mechanical properties. In order to obtain metamaterials with actively adjustable performance and structure, a unit model of metamaterial structure was first designed based on the negative Poisson's ratio structure. Then, through the calculation of basic beam theory, the critical parameters between the positive and negative transition of the Poisson's ratio of the macrostructure and the rigid body structure were obtained. In addition, through finite element simulation, the relationship between positive and negative adjustment of Poisson's ratio of materials and the proportion and arrangement of filling elements was determined. Finally, the vibration characteristics and mechanical properties of this two-dimensional structural material were analyzed in detail. The results show that this material shows excellent performance in regulating the structure and reducing vibration. Adjusting the filling form and arrangement of the internal unit, we can obtain different mechanical properties and energy absorption effects. At the same time, by introducing shape memory materials and microstructures, the materials show excellent macrostructure and intelligent adjustment of stiffness. © 2024 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.
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页码：467 / 476
页数：9
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