Topological interface state formation in an hourglass lattice sandwich meta-structure
Topological interface state formation in elastic structures has attracted extensive research interest. However, most previous studies only explored the topological properties of simple structures, such as plain beams and rods. This study explores the feasibility and methodology of producing topologi...
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sg-ntu-dr.10356-1708702023-10-04T01:52:23Z Topological interface state formation in an hourglass lattice sandwich meta-structure Yu, Dewen Hu, Guobiao Guo, Zhenkun Hong, Jun Yang, Yaowen School of Civil and Environmental Engineering Engineering::Civil engineering Metamaterial Topological Interface State Topological interface state formation in elastic structures has attracted extensive research interest. However, most previous studies only explored the topological properties of simple structures, such as plain beams and rods. This study explores the feasibility and methodology of producing topological interface states in hourglass lattice sandwich meta-structures. By extending the spectral element method (SEM), a theoretical framework is developed for analyzing such meta-structures. The results obtained by the analytical model agree well with the finite element (FE) simulation results. Based on the analytical model, we maintain the substrate plates and vary the radii of the struts that constitute the hourglass lattice to explore the topological change. The band inversion is identified in the first band gap by inspecting the band edge evolution pattern. The analysis also indicates that the second band gap does not support topological interface states. Subsequently, the vibration modes at band gap edges are examined to confirm the polarization transition. Based on these analyses, a topological sandwich meta-structure is designed. An ordinary meta-structure without using the topological design strategy is also constructed. Compared with the ordinary meta-structure, a solitary peak occurs on the transmittance curve of the topological meta-structure in the first band gap. The vibration mode at the solitary peak demonstrates that the transverse motion concentrates at the junction interface, exhibiting the typical energy localization behavior of topological interface states. The work is financed by the National Natural Science Foundation of China (Grant No. 51635010). 2023-10-04T01:52:23Z 2023-10-04T01:52:23Z 2023 Journal Article Yu, D., Hu, G., Guo, Z., Hong, J. & Yang, Y. (2023). Topological interface state formation in an hourglass lattice sandwich meta-structure. International Journal of Mechanical Sciences, 246, 108170-. https://dx.doi.org/10.1016/j.ijmecsci.2023.108170 0020-7403 https://hdl.handle.net/10356/170870 10.1016/j.ijmecsci.2023.108170 2-s2.0-85146829911 246 108170 en International Journal of Mechanical Sciences © 2023 Elsevier Ltd. All rights reserved. |
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Engineering::Civil engineering Metamaterial Topological Interface State Yu, Dewen Hu, Guobiao Guo, Zhenkun Hong, Jun Yang, Yaowen Topological interface state formation in an hourglass lattice sandwich meta-structure |
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Topological interface state formation in elastic structures has attracted extensive research interest. However, most previous studies only explored the topological properties of simple structures, such as plain beams and rods. This study explores the feasibility and methodology of producing topological interface states in hourglass lattice sandwich meta-structures. By extending the spectral element method (SEM), a theoretical framework is developed for analyzing such meta-structures. The results obtained by the analytical model agree well with the finite element (FE) simulation results. Based on the analytical model, we maintain the substrate plates and vary the radii of the struts that constitute the hourglass lattice to explore the topological change. The band inversion is identified in the first band gap by inspecting the band edge evolution pattern. The analysis also indicates that the second band gap does not support topological interface states. Subsequently, the vibration modes at band gap edges are examined to confirm the polarization transition. Based on these analyses, a topological sandwich meta-structure is designed. An ordinary meta-structure without using the topological design strategy is also constructed. Compared with the ordinary meta-structure, a solitary peak occurs on the transmittance curve of the topological meta-structure in the first band gap. The vibration mode at the solitary peak demonstrates that the transverse motion concentrates at the junction interface, exhibiting the typical energy localization behavior of topological interface states. |
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School of Civil and Environmental Engineering |
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School of Civil and Environmental Engineering Yu, Dewen Hu, Guobiao Guo, Zhenkun Hong, Jun Yang, Yaowen |
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Article |
author |
Yu, Dewen Hu, Guobiao Guo, Zhenkun Hong, Jun Yang, Yaowen |
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Yu, Dewen |
title |
Topological interface state formation in an hourglass lattice sandwich meta-structure |
title_short |
Topological interface state formation in an hourglass lattice sandwich meta-structure |
title_full |
Topological interface state formation in an hourglass lattice sandwich meta-structure |
title_fullStr |
Topological interface state formation in an hourglass lattice sandwich meta-structure |
title_full_unstemmed |
Topological interface state formation in an hourglass lattice sandwich meta-structure |
title_sort |
topological interface state formation in an hourglass lattice sandwich meta-structure |
publishDate |
2023 |
url |
https://hdl.handle.net/10356/170870 |
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1779171094512533504 |