Anisotropic Metallic Microlattice Structures for Underwater Operations
Abstract
Metamaterials have offered unprecedented potentials for wave manipulations. However, their applications in underwater acoustic wave control have remained largely unexplored. This is because of the limited material choices and the lack of reliable fabrication techniques for the complicated structures. Herein, a metamaterial with microlattice structures as the building blocks is proposed for underwater operations. By designing the building blocks of the metamaterial and assembling them in a layered fashion, anisotropy is embedded in the structure, which results along different effective sound speeds in orthogonal directions. The designed metamaterial is fabricated by metal additive manufacturing using aluminum and steel. Experiments are performed using a resonator tube to evaluate its performance in water. An anisotropy ratio of around 2 is achieved, which is in good agreement with numerical simulations. The proposed metamaterial provides an effective means for underwater sound control with reduced fabrication difficulties and increased service life.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 22, 2022
- Source ID
- 10.1002/adem.202201294
Entities
People
- Charles A. Rohde
- Chen Shen
- Colby W. Cushing
- Huifeng Du
- Junfei Li
- Michael R Haberman
- Nicholas X. Fang
- Preston S Wilson
- Steven A Cummer
- Xiuyuan Peng
- Zheng Jie Tan
Organizations
- Division of Civil, Mechanical & Manufacturing Innovation
- Duke University
- Massachusetts Institute of Technology
- Office of Naval Research
- Rowan University
- United States Naval Research Laboratory
- University of Texas at Austin