Guided Lamb waves in reconfigurable phononic crystal waveguides
We demonstrate experimentally the manipulation of Lamb waves guided along reconfigurable phononic circuits created by defects composed of threaded rods held with nuts in a perforated solid phononic crystal slab. Adjusting the free length of the rod, the resonant frequency of the defect can be tuned,...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2021-08-01
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| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/5.0056202 |
| _version_ | 1818737933167886336 |
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| author | Yan-Feng Wang Li Yang Ting-Ting Wang A-Li Chen Vincent Laude Yue-Sheng Wang |
| author_facet | Yan-Feng Wang Li Yang Ting-Ting Wang A-Li Chen Vincent Laude Yue-Sheng Wang |
| author_sort | Yan-Feng Wang |
| collection | DOAJ |
| description | We demonstrate experimentally the manipulation of Lamb waves guided along reconfigurable phononic circuits created by defects composed of threaded rods held with nuts in a perforated solid phononic crystal slab. Adjusting the free length of the rod, the resonant frequency of the defect can be tuned, without any change in the supporting phononic crystal slab. Both straight and bent waveguides are fabricated and measured in an aluminum sample with a lattice constant of 20 mm and a complete bandgap extending from 50 to 70 kHz. Guidance of Lamb waves is clearly observed by a Doppler vibrometer, even after 90° bends. The eigenmodes of guided waves are obtained using finite element analysis to explain the tuning of resonances through a bending cantilever model. Numerical and experimental results are generally found to be in fair agreement. They also suggest that the guiding frequency is rather independent of the details of the waveguides. They are of significance for the design of reconfigurable phononic devices. |
| first_indexed | 2024-12-18T01:00:55Z |
| format | Article |
| id | doaj.art-c1756734a0bf47f39df267222d0c9f50 |
| institution | Directory Open Access Journal |
| issn | 2166-532X |
| language | English |
| last_indexed | 2024-12-18T01:00:55Z |
| publishDate | 2021-08-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Materials |
| spelling | doaj.art-c1756734a0bf47f39df267222d0c9f502022-12-21T21:26:23ZengAIP Publishing LLCAPL Materials2166-532X2021-08-0198081110081110-710.1063/5.0056202Guided Lamb waves in reconfigurable phononic crystal waveguidesYan-Feng Wang0Li Yang1Ting-Ting Wang2A-Li Chen3Vincent Laude4Yue-Sheng Wang5School of Mechanical Engineering, Tianjin University, Tianjin 300350, ChinaInstitute of Engineering Mechanics, Beijing Jiaotong University, Beijing 100044, ChinaSchool of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi’an 710129, ChinaInstitute of Engineering Mechanics, Beijing Jiaotong University, Beijing 100044, ChinaInstitut FEMTO-ST, CNRS, University Bourgogne Franche-Comté, Besançon 25030, FranceSchool of Mechanical Engineering, Tianjin University, Tianjin 300350, ChinaWe demonstrate experimentally the manipulation of Lamb waves guided along reconfigurable phononic circuits created by defects composed of threaded rods held with nuts in a perforated solid phononic crystal slab. Adjusting the free length of the rod, the resonant frequency of the defect can be tuned, without any change in the supporting phononic crystal slab. Both straight and bent waveguides are fabricated and measured in an aluminum sample with a lattice constant of 20 mm and a complete bandgap extending from 50 to 70 kHz. Guidance of Lamb waves is clearly observed by a Doppler vibrometer, even after 90° bends. The eigenmodes of guided waves are obtained using finite element analysis to explain the tuning of resonances through a bending cantilever model. Numerical and experimental results are generally found to be in fair agreement. They also suggest that the guiding frequency is rather independent of the details of the waveguides. They are of significance for the design of reconfigurable phononic devices.http://dx.doi.org/10.1063/5.0056202 |
| spellingShingle | Yan-Feng Wang Li Yang Ting-Ting Wang A-Li Chen Vincent Laude Yue-Sheng Wang Guided Lamb waves in reconfigurable phononic crystal waveguides APL Materials |
| title | Guided Lamb waves in reconfigurable phononic crystal waveguides |
| title_full | Guided Lamb waves in reconfigurable phononic crystal waveguides |
| title_fullStr | Guided Lamb waves in reconfigurable phononic crystal waveguides |
| title_full_unstemmed | Guided Lamb waves in reconfigurable phononic crystal waveguides |
| title_short | Guided Lamb waves in reconfigurable phononic crystal waveguides |
| title_sort | guided lamb waves in reconfigurable phononic crystal waveguides |
| url | http://dx.doi.org/10.1063/5.0056202 |
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