Refraction of flexural wave in the valley topological interface DOI
Ping Sheng, Linyun Zhou

Physica Scripta, Journal Year: 2024, Volume and Issue: 99(11), P. 115984 - 115984

Published: Oct. 15, 2024

Abstract The transport behavior of valley kink states has attracted significant research interest due to its potential prospects in energy harvesting, vibration mitigation, and elastic wave imaging. In this work, we extensively investigate the topological refraction insulators (TIs) when edge (TES) from interface termination into bare plate. We show that pattern (negative or positive refraction) depends on type valleys which state is projected, angles can be tuned by Dirac frequency. Thus, realize conversion refracted evanescent wave, resulting no beams plate, provides a new perspective for isolation mitigation. then construct layered TI alternately arranging two unit cells with opposite phases. dispersion relation shows negative band bulk gap, corresponding different modes. states, would transfer toward (positive) direction vector along an incident couples TI, shift parallel interface. selectively achieve exciting only one desired mode. particular, presence impedance mismatch between TIs plate leads relatively low amplitude beam. Our results provide insights manipulating plates facilitate applications beam splitting, images.

Language: Английский

A low-frequency pure metal metamaterial absorber with continuously tunable stiffness DOI Creative Commons
Xingzhong Wang, Shiteng Rui, Shaokun Yang

et al.

Applied Mathematics and Mechanics, Journal Year: 2024, Volume and Issue: 45(7), P. 1209 - 1224

Published: July 1, 2024

Abstract To address the incompatibility between high environmental adaptability and deep subwavelength characteristics in conventional local resonance metamaterials, overcome deficiencies stability of existing active control techniques for band gaps, this paper proposes a design method pure metal vibration damping metamaterial with continuously tunable stiffness wideband elastic wave absorption. We dual-helix narrow-slit unit, which possesses triple advantage spatial compactness, low characteristics, structural stability, enabling opening flexural gaps low-frequency range. Similar to principle sliding rheostat, introduction plug-ins into helical slits enables continuous variation achieving gap effect. This successfully extends effective by more than ten times. The experimental results indicate that unit can be used as an additional absorber absorb energy effectively. Furthermore, it advances absorbers from purely passive narrowband one. double-helix metamaterials retain properties are suitable deployment harsh environments. Simultaneously, adjusting its stiffness, substantially broadens range, presenting promising potential applications various mechanical equipment operating under adverse conditions.

Language: Английский

Citations

7
Elastic wave spin and unidirectional routing in thin rod systems DOI
Yuxuan Zhang, Jinfeng Zhao, Yao Huang

et al.

International Journal of Mechanical Sciences, Journal Year: 2024, Volume and Issue: 277, P. 109512 - 109512

Published: June 24, 2024

Language: Английский

Citations

4
Rainbow trapping and concentration of surface waves on broad waveguide DOI
Yuyang Chen, Zhaoyang Guo, Yijie Liu

et al.

Journal of Physics D Applied Physics, Journal Year: 2024, Volume and Issue: 57(46), P. 465306 - 465306

Published: Aug. 15, 2024

Abstract In recent years, topological insulators have been widely designed to manipulate various types of classical waves. The edge states characterized by defect and backscattering immunity show great application potential in energy harvesting. This work reports a spin-locked surface wave channel, which consists concrete-filled steel tubes (CFST) placed on foundation soil. Here, the distance between lattice center CFST controls hopping strength adjacent atoms, determining phase transition. Introducing crystal with Dirac cones interface, then robust broad waveguide modes phononic heterostructure are explored. Notably, incorporating rainbow effect allows for precise regulation reliable concentration within waveguide. proposed surpasses traditional waveguides simultaneously focusing segregating energy, enabling applications low-frequency harvesting, sensing, logic gates. Our will provide an efficient recovery platform daily vibration especially vehicle loads.

Language: Английский

Citations

4
Reconfigurable topological gradient metamaterials and potential applications DOI
Kangkang Chen, Xingjian Dong, Zhike Peng

et al.

Thin-Walled Structures, Journal Year: 2024, Volume and Issue: 205, P. 112572 - 112572

Published: Oct. 15, 2024

Citations

4
Electro-mechanical multi-branch channel driven by higher-order topological rainbow DOI
Jiahao Li, Hongying Tang, Yuxin Chen

et al.

Mechanics of Advanced Materials and Structures, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 12

Published: Feb. 28, 2025

Language: Английский

Citations

0
Tunable wave couplings induced by transverse properties of elastic valley topological edge states DOI
Weitao Yuan, Jinfeng Zhao, Guozheng Kang

et al.

Physical Review Applied, Journal Year: 2025, Volume and Issue: 23(4)

Published: April 25, 2025

Language: Английский

Citations

0
Modeling and analysis of gradient metamaterials for broad fusion bandgaps DOI Creative Commons
Changqi Cai,

Chenjie Zhu,

Fengyi Zhang

et al.

Applied Mathematics and Mechanics, Journal Year: 2024, Volume and Issue: 45(7), P. 1155 - 1170

Published: July 1, 2024

Abstract A gradient metamaterial with varying-stiffness local resonators is proposed to open the multiple bandgaps and further form a broad fusion bandgap. First, three linearly increasing stiffness are periodically attached spring-mass chain construct metamaterial. The dispersion relation then derived based on Bloch’s theorem reveal bandgap theoretically. dynamic characteristic of finite investigated validate bandgaps. Finally, effects design parameters discussed. results show that non-uniform pattern capable opening effectively attenuating longitudinal waves within frequency region.

Language: Английский

Citations

2
Embodiment of parallelizable mechanical logic utilizing multimodal higher-order topological states DOI
Patrick Dorin, Kon‐Well Wang

International Journal of Mechanical Sciences, Journal Year: 2024, Volume and Issue: 284, P. 109697 - 109697

Published: Sept. 6, 2024

Citations

1
Embodiment of Frequency-Selective and Parallelizable Mechanical Logic in Metamaterials Utilizing Multimodal Higher-Order Topological States DOI
Patrick Dorin, Kon‐Well Wang

Published: Jan. 1, 2024

Language: Английский

Citations

0
Refraction of flexural wave in the valley topological interface DOI
Ping Sheng, Linyun Zhou

Physica Scripta, Journal Year: 2024, Volume and Issue: 99(11), P. 115984 - 115984

Published: Oct. 15, 2024

Abstract The transport behavior of valley kink states has attracted significant research interest due to its potential prospects in energy harvesting, vibration mitigation, and elastic wave imaging. In this work, we extensively investigate the topological refraction insulators (TIs) when edge (TES) from interface termination into bare plate. We show that pattern (negative or positive refraction) depends on type valleys which state is projected, angles can be tuned by Dirac frequency. Thus, realize conversion refracted evanescent wave, resulting no beams plate, provides a new perspective for isolation mitigation. then construct layered TI alternately arranging two unit cells with opposite phases. dispersion relation shows negative band bulk gap, corresponding different modes. states, would transfer toward (positive) direction vector along an incident couples TI, shift parallel interface. selectively achieve exciting only one desired mode. particular, presence impedance mismatch between TIs plate leads relatively low amplitude beam. Our results provide insights manipulating plates facilitate applications beam splitting, images.

Language: Английский

Citations

0