Finite Element Modeling of a Piezoelectric Composite Beam and Comparative Performance Study of Piezoelectric Materials for Voltage Generation
Finite Element Modeling of a Piezoelectric Composite Beam and Comparative Performance Study of Piezoelectric Materials for Voltage Generation
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DOI：
10.5402/2012/921361
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发表时间：
2012-09
期刊：
影响因子：
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通讯作者：
A. Nechibvute;A. Chawanda;P. Luhanga
中科院分区：
文献类型：
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作者：
A. Nechibvute;A. Chawanda;P. Luhanga
传统PZT陶瓷和新型单晶的比较研究对于选择最佳材料和优化传感器设计至关重要，例如将环境振动转换为有用的电能。然而，由于材料和制造成本以及在优化换能器设计时需要快速原型制作，主要比较可以基于仿真。本文利用COMSOL Multiphysics有限元软件包研究了压电复合材料梁自由端受外载荷作用时的直接压电效应。主要输出参数，如电位和电场作为输入应变和应力的函数进行了研究。建模是相对较新的单晶铅镁石-钛酸铅（PMN 32）和三种不同的锆钛酸铅陶瓷（PZT-5A，PZT-5 H，和PZT-4）。材料性能进行了评估，通过使用一个共同的几何形状和相同的激励条件下，不同的压电材料。对于每种材料，进行三种分析，即静态、本征频率和瞬态/时间相关分析。比较结果清楚地表明，新的晶体材料PMN 32能够优于目前使用的压电陶瓷的电压产生。
A comparative study of the traditional PZT ceramics and new single crystals is critical in selecting the best material and optimization of transducer design for applications such as conversion of ambient vibrations into useful electrical energy. However, due to material and fabrication costs and the need for rapid prototyping while optimizing transducer design, primary comparisons can be based on simulation. In this paper, the COMSOL Multiphysics finite element package was used to study the direct piezoelectric effect when an external load is applied at the free end of a piezoelectric composite beam. The primary output parameters such as electric potential and electric field were studied as a function of the input strain and stress. The modeling is presented for the relatively new single crystal lead magnesium niobate-lead titanate (PMN32) and three different lead zirconate titanate ceramics (PZT-5A, PZT-5H, and PZT-4). Material performance was assessed by using a common geometry and identical excitation conditions for the different piezoelectric materials. For each material, there are three analyses performed, namely, static, eigenfrequency, and transient/time-dependent analysis. Comparative results clearly suggest that the new crystal material PMN32 is capable of outperforming presently useing piezoelectric ceramics for voltage generation.