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Bending behaviors of flexible acoustic wave devices under non-uniform elasto-plastic deformation

Zhang, Qian, Wang, Yong, Li, Dongsheng, Yang, Xin, Xie, Jin and Fu, Yongqing 2021. Bending behaviors of flexible acoustic wave devices under non-uniform elasto-plastic deformation. Applied Physics Letters 118 (12) , 121601. 10.1063/5.0043550

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ABSTRACT Flexible acoustic wave devices (FAWDs) have been explored in various applications where bending is inevitable. However, theoretical investigations of bending behavior of FAWDs hitherto are mostly done in the linear deformation regime. Herein, we develop a multi-sublayer model based on a stiffness matrix method for analysis of frequency shifts of surface acoustic waves and Lamb waves under elasto-plastic deformations. Using this model, we calculate the frequency shifts for the cases of both an elastic bending and an elasto-plastic bending. Experimental frequency shifts of ZnO/Al flexible devices show good agreement with the theoretical results in the elastic bending tests (with a relative error of strain sensitivity < 3%) and also show relatively good agreement with the qualitative theoretical predictions in the nonlinearly elasto-plastic bending. For three successive bending and recovery processes, the experimentally obtained frequency shifts show good repeatability in the elastic and elasto-plastic bending, demonstrating maximum relative errors of strain sensitivities less than 6.1% and 18.2%.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: AIP Publishing
ISSN: 0003-6951
Date of First Compliant Deposit: 23 March 2021
Date of Acceptance: 22 March 2021
Last Modified: 30 Oct 2021 16:44

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