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| Design and performance analysis of tunable bandgaps of phononic crystal based on material phase-change |
| Received:June 16, 2021 Revised:July 02, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20210616417 |
| KeyWord:phononic crystal tunable band gap shape memory alloy metamaterial/structure finite element method |
| Author | Institution |
| 刘书田 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室, 大连 |
| 毛竹新 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室, 大连 |
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| Abstract: |
| In this paper, a novel tunable phononic crystal structure based on material phase change is proposed. The structure is a combination of shape memory alloy with gap and epoxy resin. The band gap of the phononic crystal can be adjusted by the change of material properties of shape memory alloy caused by temperature change;the tunable design of the band gap properties of the phononic crystal is realized by arranging the gap and the position of the shape memory alloy phase material reasonably. Based on the finite element method, an analytical model of the tunable phononic crystal is established, and the effects of the filling fraction and phase transformation of the shape memory alloy on the band gap properties are analyzed. The results show that the position and width of the band gap can be adjusted by reasonable design of the microstructure, and the band gap can be within or without a specific frequency band. |