An active mechanical Willis meta-layer with asymmetric polarizabilities

• Published in: Nature communications Vol. 11; no. 1; pp. 3681 - 8
• Main Authors: Chen, Yangyang, Li, Xiaopeng, Hu, Gengkai, Haberman, Michael R., Huang, Guoliang
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 23.07.2020; Nature Publishing Group; Nature Portfolio
• Subjects: 639/166/988; 639/624/399/1015; 639/766/25/3927; Acoustics; Actuators; Aerospace engineering; Amplitudes; Broadband; Coupling coefficients; Couplings; Cross coupling; Design; Digital electronics; Elastic waves; Homogenization; Humanities and Social Sciences; multidisciplinary; Piezoelectricity; Plates; Polarizability; Science; Science (multidisciplinary); Sensors; Shear strain; Systems stability; Tensors; Wave propagation; Wave reflection

Willis materials exhibit macroscopic cross-coupling between particle velocity and stress as well as momentum and strain. However, Willis coupling coefficients designed so far are intrinsically coupled, which inhibits their full implementation in structural dynamic applications. This work presents a...