Measurement of Static Strain Distribution Using Piezoelectric Polymer Film : Principle and Application to a Holed Plate
Measurement of Static Strain Distribution Using Piezoelectric Polymer Film : Principle and Application to a Holed Plate
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使用压电聚合物薄膜测量静态应变分布：原理及其在孔板上的应用
DOI：
10.1299/jsmea.42.11
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
T. Shibata
中科院分区：
文献类型：
--
作者：
Keisuke Katsumi;S. Biwa;E. Matsumoto;T. Shibata
本研究的目的是利用压电聚合物薄膜传感器评估结构部件的面内静态应变分布的可行性。与通常使用压电薄膜作为检测闭合电路中的电荷或电流的应变和应变率传感器相比，所提出的策略包括直接测量安装在变形结构部件表面上的压电薄膜中感应的电势分布。考虑到薄膜材料的压电本构定律，根据测量的电势确定应变分布。作为说明性示例，将偏振聚偏二氟乙烯（PVDF）薄膜安装在经受面内负载的有孔弹性板上，并通过静电电压计测量薄膜表面上的感应电势分布。结果表明，所确定的应变分布与线弹性理论预测的应变分布基本一致。
The objective of the present study is to exploit the feasibility of piezoelectric polymer film sensors to evaluate in-plane static strain distributions of structural components. In contrast to ordinary use of piezoelectric films as strain and strain-rate sensors detecting electric charges or currents in a closed circuit, the proposed strategy consists of directly measuring the distribution of electric potentials induced in the piezoelectric film mounted on the surface of a deforming structural component. Strain distributions are determined from the measured potentials taking into account the piezoelectric constitutive law of the film material. As an illustrative example, thin films of polarized polyvinylidene fluoride (PVDF) are mounted on a holed elastic plate subjected to in-plane loading, and the induced potential distributions are measured on the film surface by an electrostatic voltmeter. It is demonstrated that the determined strain distributions are in fair conformity with those predicted by the theory of linear elasticity.