论文标题
在压电层压板中最大化电孔耦合
Maximizing the electromomentum coupling in piezoelectric laminates
论文作者
论文摘要
不对称的压电复合材料在其宏观线性动量和电场之间表现出耦合，这是一种未在微观尺度出现的耦合。这种电元耦合构成了一个额外的旋钮，可以定制介质的动态响应，类似于弹性复合材料中的Willis耦合。在这里，我们采用拓扑和自由材料优化方法来最大程度地提高低频，长波长极限的周期性压电层压板的电脑耦合。我们发现，耦合可以通过数量级来增强，具体取决于优化过程中的自由度。我们发现的最佳组成为具有最大电物耦合的超材料设计提供了指南，为它们在波浪控制应用中的集成铺平了道路。
Asymmetric piezoelectric composites exhibit coupling between their macroscopic linear momentum and electric field, a coupling that does not appear at the microscopic scale. This electromomentum coupling constitutes an additional knob to tailor the dynamic response of the medium, analogously to the Willis coupling in elastic composites. Here, we employ topology- and free material optimization approaches to maximize the electromomentum coupling of periodic piezoelectric laminates in the low frequency, long-wavelength limit. We find that the coupling can be enhanced by orders of magnitude, depending on the degrees of freedom in the optimization process. The optimal compositions that we find provide guidelines for the design of metamaterials with maximum electromomentum coupling, paving the way for their integration in wave control applications.
