Asymmetric lamb wave propagation and mode isolation in thin plate with spatiotemporal periodic stiffness
The Lamb wave propagation through a thin plate with periodic spatiotemporal variation of material property was investigated through numerical simulations. It was found that regular oscillations of Young's modulus in both space and time can lead to the creation of distinct band gaps for differen...
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| 其他作者: | |
| 格式: | Journal Article |
| 语言: | English |
| 出版: |
2019
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| 主题: | |
| 在线阅读: | https://hdl.handle.net/10356/105470 http://hdl.handle.net/10220/48719 |
| _version_ | 1826123272869117952 |
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| author | Zhao, Liuxian Lai, Chang Quan |
| author2 | Temasek Laboratories |
| author_facet | Temasek Laboratories Zhao, Liuxian Lai, Chang Quan |
| author_sort | Zhao, Liuxian |
| collection | NTU |
| description | The Lamb wave propagation through a thin plate with periodic spatiotemporal variation of material property was investigated through numerical simulations. It was found that regular oscillations of Young's modulus in both space and time can lead to the creation of distinct band gaps for different modes of Lamb wave. Moreover, the dispersion relation for each mode was dependent on the direction of wave propagation (i.e., nonreciprocal). These results allow the Lamb wave modes to be reduced to a single mode traveling in a single direction for specific frequencies. This frequency range was observed to widen with an increasing modulation amplitude of Young's modulus but was not significantly altered by the modulation frequency. The insights derived from this study indicate that spatiotemporal control of material property can be used to effectively isolate Lamb wave modes and reduce reflections, leading to an improvement in the accuracy of the structural health monitoring of materials. |
| first_indexed | 2024-10-01T06:01:57Z |
| format | Journal Article |
| id | ntu-10356/105470 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:01:57Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/1054702021-07-24T20:11:24Z Asymmetric lamb wave propagation and mode isolation in thin plate with spatiotemporal periodic stiffness Zhao, Liuxian Lai, Chang Quan Temasek Laboratories Science::Physics Lamb Wave Directional Wave Propagation The Lamb wave propagation through a thin plate with periodic spatiotemporal variation of material property was investigated through numerical simulations. It was found that regular oscillations of Young's modulus in both space and time can lead to the creation of distinct band gaps for different modes of Lamb wave. Moreover, the dispersion relation for each mode was dependent on the direction of wave propagation (i.e., nonreciprocal). These results allow the Lamb wave modes to be reduced to a single mode traveling in a single direction for specific frequencies. This frequency range was observed to widen with an increasing modulation amplitude of Young's modulus but was not significantly altered by the modulation frequency. The insights derived from this study indicate that spatiotemporal control of material property can be used to effectively isolate Lamb wave modes and reduce reflections, leading to an improvement in the accuracy of the structural health monitoring of materials. Accepted version The Temasek Research Fellowship 2019-06-13T05:15:39Z 2019-12-06T21:51:58Z 2019-06-13T05:15:39Z 2019-12-06T21:51:58Z 2019 Journal Article Zhao, L. & Lai, C. Q. (2019). Asymmetric lamb wave propagation and mode isolation in thin plate with spatiotemporal periodic stiffness. Journal of Vibration and Acoustics, 141(5), 051005-. https://dx.doi.org/10.1115/1.4043509 1048-9002 https://hdl.handle.net/10356/105470 http://hdl.handle.net/10220/48719 10.1115/1.4043509 5 141 051005 en Journal of Vibration and Acoustics © 2019 ASME. All rights reserved. This paper was published in Journal of Vibration and Acoustics and is made available with permission of ASME. application/pdf |
| spellingShingle | Science::Physics Lamb Wave Directional Wave Propagation Zhao, Liuxian Lai, Chang Quan Asymmetric lamb wave propagation and mode isolation in thin plate with spatiotemporal periodic stiffness |
| title | Asymmetric lamb wave propagation and mode isolation in thin plate with spatiotemporal periodic stiffness |
| title_full | Asymmetric lamb wave propagation and mode isolation in thin plate with spatiotemporal periodic stiffness |
| title_fullStr | Asymmetric lamb wave propagation and mode isolation in thin plate with spatiotemporal periodic stiffness |
| title_full_unstemmed | Asymmetric lamb wave propagation and mode isolation in thin plate with spatiotemporal periodic stiffness |
| title_short | Asymmetric lamb wave propagation and mode isolation in thin plate with spatiotemporal periodic stiffness |
| title_sort | asymmetric lamb wave propagation and mode isolation in thin plate with spatiotemporal periodic stiffness |
| topic | Science::Physics Lamb Wave Directional Wave Propagation |
| url | https://hdl.handle.net/10356/105470 http://hdl.handle.net/10220/48719 |
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