Surface effects on the energy-generating performance of piezoelectric circular nanomembrane energy harvesters under pressure loading

被引：17
|
作者：
Wang, K. F. [1 ]
Wang, B. L. [2 ]
机构：
[1] Harbin Inst Technol, Grad Sch Shenzhen, Harbin 150001, Peoples R China
[2] Univ Western Sydney, Inst Infrastruct Engn, Penrith, NSW 2751, Australia
来源：
EPL | 2014年 / 108卷 / 01期
基金：
澳大利亚研究理事会; 美国国家科学基金会;
关键词：
VIBRATION; NANOWIRES; BEHAVIOR; PLATE;
D O I：
10.1209/0295-5075/108/17001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The influence of surface effects on the energy-generating performance of piezoelectric circular nanomembrane energy harvesters under blood pressure is studied. The effects of surface elasticity, surface piezoelectricity, residual surface stress and geometry nonlinear strain are incorporated in the present model. An approximated closed-form solution for the electrical energy of the nanomembrane is derived by using the energy method. Results show that positive surface elasticity and residual surface stress reduce the electrical energy and the surface piezoelectricity effect increases the electrical energy. The influence of surface effect on the energy-generating performance of piezoelectric circular membranes is more significant for a membrane with a small thickness and a large radius-to-thickness ratio. Copyright (C) EPLA, 2014
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页数：6
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