title: Dispersion suppression of guided elastic waves by anisotropic metamaterial.
abstract: This investigation presents a method to engineer a metamaterial exhibiting the desired anisotropic wave behavior with the specific applications toward the dispersion suppression of elastic guided waves. In the proposed approach, effective anisotropic properties required for dispersion suppression were first determined. Then the slowness curves for the metamaterial were used to find the specific unit cell configuration through inverse design. When the metamateral layers were attached to the homogeneous waveguide, the target guided mode was shown to exhibit little dispersion. Detailed engineering procedures were given, and the direct numerical simulations were performed to confirm the effectiveness of the proposed approach.
authors.affiliation: WCU Multiscale Mechanical Design Division, School of Mechanical and Aerospace Engineering, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea psma@kimm.re.kr.
authors.forename: Pyung Sik
authors.initials: PS
authors.lastname: Ma
authors.affiliation: Institute of Advanced Machines and Design, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea hyungjinlee@snu.ac.kr.
authors.forename: Hyung Jin
authors.initials: HJ
authors.lastname: Lee
authors.affiliation: WCU Multiscale Mechanical Design Division, School of Mechanical and Aerospace Engineering, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea yykim@snu.ac.kr.
authors.forename: Yoon Young
authors.initials: YY
authors.lastname: Kim