Applied Mathematics and Mechanics (English Edition) ›› 2021, Vol. 42 ›› Issue (11): 1543-1554.doi: https://doi.org/10.1007/s10483-021-2787-8

• 论文 •    下一篇

A new tunable elastic metamaterial structure for manipulating band gaps/wave propagation

Zhenyu WANG, Zhaoyang MA, Xingming GUO, Dongsheng ZHANG   

  1. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai University, Shanghai 200444, China
  • 收稿日期:2021-08-03 修回日期:2021-09-10 出版日期:2021-11-01 发布日期:2021-10-23
  • 通讯作者: Xingming GUO, E-mail:xmguo@shu.edu.cn
  • 基金资助:
    the National Natural Science Foundation of China (Nos. 11872233, 12102245, and 11727804)

A new tunable elastic metamaterial structure for manipulating band gaps/wave propagation

Zhenyu WANG, Zhaoyang MA, Xingming GUO, Dongsheng ZHANG   

  1. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai University, Shanghai 200444, China
  • Received:2021-08-03 Revised:2021-09-10 Online:2021-11-01 Published:2021-10-23
  • Contact: Xingming GUO, E-mail:xmguo@shu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China (Nos. 11872233, 12102245, and 11727804)

摘要: A one-dimensional mechanical lattice system with local resonators is proposed as an elastic metamaterial model, which shows negative mass and negative modulus under specific frequency ranges. The proposed representative units, consisting of accurately arranged rigid components, can generate controllable translational resonance and achieve negative mass and negative modulus by adjusting the local structural parameters. A shape memory polymer is adopted as a spring component, whose Young's modulus is obviously affected by temperature, and the proposed metamaterials' tunable ability is achieved by adjusting temperature. The effect of the shape memory polymer's stiffness variation on the band gaps is investigated detailedly, and the special phenomenon of intersecting dispersion curves is discussed, which can be designed and controlled by adjusting temperature. The dispersion relationship of the continuum metamaterial model affected by temperature is obtained, which shows great tunable ability to manipulate wave propagation.

关键词: tunable elastic metamaterial, negative mass, negative modulus

Abstract: A one-dimensional mechanical lattice system with local resonators is proposed as an elastic metamaterial model, which shows negative mass and negative modulus under specific frequency ranges. The proposed representative units, consisting of accurately arranged rigid components, can generate controllable translational resonance and achieve negative mass and negative modulus by adjusting the local structural parameters. A shape memory polymer is adopted as a spring component, whose Young's modulus is obviously affected by temperature, and the proposed metamaterials' tunable ability is achieved by adjusting temperature. The effect of the shape memory polymer's stiffness variation on the band gaps is investigated detailedly, and the special phenomenon of intersecting dispersion curves is discussed, which can be designed and controlled by adjusting temperature. The dispersion relationship of the continuum metamaterial model affected by temperature is obtained, which shows great tunable ability to manipulate wave propagation.

Key words: tunable elastic metamaterial, negative mass, negative modulus

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