Macro fiber composites (MFCs) are widely used in various fields due to their excellent piezoelectric performance. This paper presents a novel method that combines analytical and finite element analysis to accurately model MFCs. The method iteratively calculates the nonlinear poling field generated by interdigital electrodes (IDEs), leading to reliable estimates of the local orientation and properties of the piezoceramic. The local poling state is then incorporated into a 3D representative volume element (RVE) model to determine the strain response of the device under realistic loading conditions. The influence of the poling voltages, piezoceramic fiber thickness, and IDE geometries on the poling and actuating performance of the device is studied. Furthermore, considering the complexity of the modeling the entire MFC device, a simplified method is further presented that is much more efficient and maintains the same level of accuracy.

中文翻译：

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一种考虑叉指电极引起的不均匀极化的粗纤维复合材料建模和均匀化新方法

粗纤维复合材料（MFC）因其优异的压电性能而广泛应用于各个领域。本文提出了一种结合解析分析和有限元分析来精确建模 MFC 的新方法。该方法迭代计算由叉指电极（IDE）产生的非线性极化场，从而可靠地估计压电陶瓷的局部取向和特性。然后将局部极化状态合并到 3D 代表性体积单元 (RVE) 模型中，以确定器件在实际负载条件下的应变响应。研究了极化电压、压电陶瓷纤维厚度和 IDE 几何形状对器件极化和驱动性能的影响。此外，考虑到整个MFC器件建模的复杂性，进一步提出了一种更有效且保持相同精度水平的简化方法。