A Design of Tunable Band Gaps in Anti-tetrachiral Structures Based on Shape Memory Alloy  

作　　者：Zhuxin Mao Shutian Liu 

机构地区：[1]State Key Laboratory of Structural Analysis,Optimization and CAE Software for Industrial Equipment,Dalian University of Technology,Dalian 116024,China

出　　处：《Acta Mechanica Solida Sinica》2023年第6期802-816,共15页固体力学学报（英文版）

基　　金：the financial support for this work provided by the National Natural Science Foundation of China(Grant Nos.12272076 and 11821202);the 111 Project(B14013)and the Fundamental Research Funds for the Central Universities of China(DUT21GF101).

摘　　要：Benefitted from the properties of band gaps,elastic metamaterials(EMs)have attracted extensive attention in vibration and noise reduction.However,the width and position of band gaps are fixed once the traditional structures are manufactured.It is difficult to adapt to complex and changeable service conditions.Therefore,research on intelligent tunable band gaps is of great importance and has become a hot issue in EMs.To achieve smart control of band gaps,a design of tunable band gaps in anti-tetrachiral structures based on shape memory alloy(SMA)is proposed in this paper.By governing the phase transition process of SMA,the geometric configuration and material properties of structures can be changed,resulting in tunable band gaps.Therein,the energy band structures and generation mechanism of tunable band gaps in different states are studied,realizing intelligent manipulation of elastic waves.In addition,the influence of different geometric parameters on band gaps is investigated,and the desired bandgap position can be customized,making bandgap control more flexible.In summary,the proposed SMA-based anti-tetrachiral metamaterial provides valuable reference for the application of SMA materials and the development of EMs.

关 键 词：Elastic metamaterials Anti-tetrachiral structures Tunable band gaps Shape memory alloy 

分 类 号：TG146.2[一般工业技术—材料科学与工程]