Piezoelectric Performance of PVDF Composites for Transportation Engineering: A Multi-Scale Simulation Study

Xiao-Hong Yin, Jin Jian, Can Yang, T. Lei, Tao Cheng
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Abstract

In the present work, the poly (vinylidene fluoride) composite filled with the lead zirconium titanate (PVDF/PZT) was numerically investigated focusing on the improvement of piezoelectric performance parameters. With a multi-scale simulation strategy, effects of the PZT fillers’ orientation and length on the electrical outputs of the piezoelectric energy collectors buried in the roads were systematically examined. Specifically, at the micro-scale, based on our previous research results, Comsol Multiphysics connected with Matlab was utilized to create the unit cell of piezoelectric composites. The simulation results showed that parameters of PZT nano-fillers greatly affect the piezoelectric coefficients. For the macro-scale simulation, a road energy collector with innovative symmetrical cantilever structure was designed, with piezoelectric constants obtained at micro-scale simulation as inputs. The correlation between the output voltage of the energy-collector and PZT parameters (i.e., orientation and length) was successfully developed by applying the vehicle’s axle-load. This work provides a way for tailoring the piezoelectric performance of the macro components (i.e., sensors) through adjusting the states of the fillers inside the piezoelectric composites.
运输工程用PVDF复合材料压电性能的多尺度模拟研究
本文对钛酸锆铅填充聚偏氟乙烯复合材料(PVDF/PZT)进行了数值研究,重点研究了其压电性能参数的改善。采用多尺度仿真策略,系统研究了埋地压电集能器的方向和长度对集能器输出电流的影响。具体而言,在微观尺度上,在前人研究成果的基础上,利用Comsol Multiphysics结合Matlab构建压电复合材料的单元胞。仿真结果表明,PZT纳米填料的参数对压电系数有很大影响。在宏观模拟中,以微尺度模拟得到的压电常数为输入,设计了一种创新的对称悬臂结构道路能量集热器。通过施加车辆的轴载,成功地开发了能量收集器的输出电压与PZT参数(即方向和长度)之间的相关性。这项工作提供了一种通过调整压电复合材料内部填料的状态来定制宏观组件(即传感器)的压电性能的方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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