一种弯曲主导型热膨胀点阵超材料的带隙特性研究  

Band Gaps Characteristics of a Bending-Oriented Thermal Expansion Lattice Metamaterials

作　　者：刘成龙 许卫锴[1] 吕树辰 祁武超[1] LIU Chenglong;XU Weikai;LYU Shuchen;QI Wuchao(Key Laboratory of Liaoning Province for Composite Structural Analysis of Aerocraft and Simulation,Shenyang Aerospace University, Shenyang 110136, China)

机构地区：[1]沈阳航空航天大学,辽宁省飞行器复合材料结构分析与仿真重点实验室,沈阳110136

出　　处：《人工晶体学报》2020年第10期1782-1786,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金(11502149);辽宁省自然科学基金(2019-ZD-0229,2019-ZD-0297);辽宁省教育厅基础研究项目(JYT19056)。

摘　　要：当前科技的发展对材料的多功能性提出了更高的要求。本文利用有限元法针对一种具有三角晶格的弯曲主导型热膨胀点阵超材料(JTCLM)进行了带隙研究,并讨论了几何参数对JTCLM单胞带隙的影响。结果表明,当JTCLM单胞存在弯曲曲率时将会产生带隙,且材料的几何参数对JTCLM点阵复合材料的带隙具有显著的影响。结果为实现热膨胀/带隙双目标的超材料设计提供了理论基础。通过合理的选材和形状设计,有望实现特定膨胀性质和带隙设计的双目标共赢,使材料具有更好的可调谐性和多功能性。The current development of science and technology has put forward higher requirements for the versatility of materials.In this paper,a bending-oriented joint-bonded triangular cell lattice metamaterial(JTCLM)with triangular lattice was studied,and the influencce of geometrical parameters on the band gaps of JTCLM unit cell was discussed.The results show that the band gaps will be generated when the JTCLM cell has curved curvature,and the geometrical parameters of the microstructure have significant influence on the band gap of the JTCLM lattice composite.The results provide a theoretical basis for the design of metamaterials with binocular objects of thermal expansion and band gaps.Through reasonable material selection and shape design,it is expected to achieve a win-win situation with specific expansion properties and band gap design,so that the material has better tunability and versatility.

关 键 词：点阵超材料 带隙特性 声子晶体 热膨胀 周期结构 

分 类 号：O734[理学—晶体学]