On the optimal bending deflection of piezoelectric scavengers

被引：6
作者：
Benasciutti, Denis [1 ]
Moro, Luciano [1 ]
Gallina, Marco [1 ]
机构：
[1] Univ Udine, DIEGM, I-33100 Udine, Italy
来源：
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES | 2013年 / 24卷 / 05期
关键词：
Energy harvesting; piezoelectric; bending deflection; BIMORPH; BEAM; CANTILEVER; MODEL;
D O I：
10.1177/1045389X12469451
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This study aims at exploring the possibility to optimize the electromechanical efficiency of piezoelectric cantilevers by imposing an optimal deflection to classical rectangular devices, rather than designing non-conventional geometries. Focusing on non-vibrating loading conditions, the proposed approach is to apply a constant bending moment to the beam in order to reach the maximum allowable stress on the whole outermost surface. This is realized in practice by pressing the cantilever over a cylindrical-shaped support. Theoretical and numerical models with electromechanical coupling are developed to evaluate the performance improvement compared to the deflection of a classical tip-load configuration. Finally, experimental tests have been performed to further verify the electrical power enhancement given by the proposed optimized layout.
引用
收藏
页码：627 / 639
页数：13
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