Behavior of vibration energy harvesters composed of polymer fibers and piezoelectric ceramic particles
Behavior of vibration energy harvesters composed of polymer fibers and piezoelectric ceramic particles
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DOI：
10.1016/j.sna.2019.111699
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发表时间：
2020-03-01
影响因子：
4.6
通讯作者：
Kakimoto, K.
中科院分区：
文献类型：
--
作者：
Hasegawa, R.;Mehnert, M.;Kakimoto, K.
聚合物纤维和陶瓷颗粒的柔性压电复合材料是环境振动能量采集器的有希望的候选者。然而，聚合物纤维和陶瓷颗粒之间的应力传递行为的观察尚未澄清。在这项研究中，测量了纤维内部和外部具有陶瓷颗粒的两种类型的复合材料的输出，其中纤维内部的陶瓷颗粒的输出为209 mV，纤维外部的输出为91 mV。实验结果证实了使用基于微观结构的有限元方法。建立了一个由一个压电颗粒和两个聚合物纤维组成的简化微结构模型，并施加了规定的应变。陶瓷颗粒在纤维内部的应变大于纤维外部的应变，这与实验结果定量一致。分析表明，聚合物纤维和陶瓷颗粒之间的应力传递发生在界面上，对电输出是重要的。这是第一个研究，以澄清应力传递和输出之间的关系。研究结果将有助于柔性压电复合材料的材料设计及其在环境振动能量采集器中的应用。(C)2019爱思唯尔B.V.保留所有权利。
Flexible piezoelectric composites of polymer fiber and ceramic particles are promising candidates for ambient vibration energy harvesters. However, observations of stress transfer behavior between polymer fiber and ceramic particle have not been clarified. In this study, the output from two types of composite with ceramic particles inside and outside of the fiber was measured, where the output for ceramic particles inside the fiber was 209 mV and 91 mV for fibers outside. Experimental results were confirmed using a microstructure-based finite element method. A simplified microstructure model that consists of one piezoelectric particle and two polymer fibers was created and loaded with the prescribed strain. Ceramic particle strain inside the fiber was higher than one outside the fiber, which was quantitatively consistent with experimental results. Analysis indicates that stress transfer between the polymer fiber and ceramic particles occurs on the interface and is important for electrical output. This is the first study to clarify the relation between stress transfer and output. Study results will lead to the material design of flexible piezoelectric composites and their application to ambient vibration energy harvesters. (C) 2019 Elsevier B.V. All rights reserved.