Numerical and experimental characterizations of longitudinally polarized piezoelectric d15 shear macro-fiber composites
Numerical and experimental characterizations of longitudinally polarized piezoelectric d15 shear macro-fiber composites
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DOI：
10.1007/s00707-013-0952-9
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发表时间：
2013-11-01
期刊：
影响因子：
2.7
通讯作者：
Drossel, Welf-Guntram
中科院分区：
文献类型：
--
作者：
Kranz, Burkhard;Benjeddou, Ayech;Drossel, Welf-Guntram
本文提出了原型纵向极化压电d（15）剪切宏纤维复合材料（MFC）的原始数值和实验表征。数值表征包括基于代表性体积单元的有限元模拟。它实现了作者最近提出的基于焓的均匀化方法（EBHM），作为所谓的应变能法在正交各向异性压电纤维增强复合材料中的扩展。对先前假设的剪切MFC布局进行了数值验证。然后，利用EBHM得到剪切MFC实际布置的有效机电材料参数。这些参数通过在原始驱动基准的有限元模拟中进一步验证，该基准是为制造的剪切MFC实验表征提出的。后者是基于低频（准静态）位移测量，其中剪切MFC作为电压驱动的执行器。由于整体位错较小，采用激光测振仪进行测量。实验结果与数值结果比较表明，两者吻合较好，驱动响应呈非线性。这项工作的主要成果是EBHM的实验验证和制造的纵向极化压电d（15）剪切MFC的驱动功能可操作性。这为它们作为振动、形状和健康控制的剪切弯曲和扭转的致动器和传感器，或作为能量收集的换能器提供了可能性。
This contribution presents original numerical and experimental characterizations for prototyped longitudinally polarized piezoelectric d (15) shear macro-fiber composites (MFC). The numerical characterization consists of a finite element (FE) simulation based on a representative volume element. It implements an enthalpy-based homogenization method (EBHM), recently proposed by the authors, as an extension of the so-called strain energy method to orthotropic piezoelectric fiber-reinforced composites. The numerical validation is carried out on a previously assumed layout of shear MFC. Later on, the EBHM is used to get the effective electromechanical material parameters of the shear MFC actual layout. These parameters are further validated experimentally through their use in the FE simulation of an original actuation benchmark that is proposed for the manufactured shear MFC experimental characterization. The latter is based on low-frequency (quasi-static) displacement measurements where the shear MFC serves as a voltage-driven actuator. Due to the small overall dislocation, a laser vibrometer is used for the measurements. The comparison of experimental and numerical results shows a reasonably good agreement and a nonlinear actuation response is observed. This work's major outcomes are the experimental validation of the EBHM and the actuation functional operability of the manufactured longitudinally polarized piezoelectric d (15) shear MFC. This opens the possibility for their application as actuator and sensor of shear-induced bending and torsion for vibration, shape and health control, or as a transducer for energy harvesting.