Session: VIB-02/MSNDC-10-03

Paper Number: 148397

148397 - Programmable Metamaterials With Nonlinear Host Structures 

This study discusses locally-resonant (LR) metastructures with programmable nonlinear parameters. For a nonlinear beam with an array of periodically attached resonators, we calculate the effective linear and nonlinear stiffness through the frequency response under various forcing amplitudes.

In past decades, metamaterials have been extensively studied due to their special optical, acoustic, and electromagnetic properties, which differ from those of natural materials. These properties arise from the microstructure of the material, rather than its chemical composition. Recently, metamaterials with programmable features have also been developed, where mechanical or electrical properties can be adjusted through careful design of the local resonators. This study focuses on finite-sized, structural LR metamaterials, or metastructures with programmable nonlinear parameters. For a nonlinear structure with a periodically attached array of resonators, our goal is to determine the relationships between the resonator parameters (such as tuning, mass, and spatial distribution) and the effective parameters of the nonlinear metastructure, such as linear and nonlinear stiffness and damping. This will inform the design decisions for configurable nonlinear metastructures.

For a larger resonator mass ratio (𝜇), the effective linear and nonlinear stiffnesses are higher. This example showcases the programmability of a metastructure by altering the local-resonator parameters. In the future, we will extend this study to a larger parameter space. We will also focus on the effects of the spatial distribution and the tuning of resonators on the nonlinear system parameters, and establish design methods to develop highly-configurable metastructures

Presenting Author: Bing Wu Stevens Institute of Technology

Presenting Author Biography: Bing Wu
Ph.D. Candidate, Stevens Institute of Technology, Acar Lab
Research Focus: Metamaterials, Programmable Metastructures, Dynamics of Offshore Wind Turbines, Nonlinear Vibration, Nonlinear Dynamics.

Education

Ph.D. in Mechanical Engineering (2nd year, Ongoing, Expected 2026)
Stevens Institute of Technology, Hoboken, NJ
Joined Acar Lab as a doctoral student in 2022.

M.S. in Mechanical Engineering (2022)
Stevens Institute of Technology, Hoboken, NJ
Joined Acar Lab as a master's student in 2021 and completed degree in 2022.

B.Sc. in Engineering (2019)
Zhengzhou University, Zhengzhou, China
Graduated with honors and received the Outstanding Undergraduate Thesis Award.

Awards and Honors
Provost's Fellowship, Stevens Institute of Technology (2022)
Awarded for academic excellence at the graduate level.
Outstanding Student Scholarship (2018)
Recognized for exceptional academic performance during undergraduate studies.

Teaching Experience
Teaching Assistant for three Mechanical Engineering courses, Stevens Institute of Technology
Assisted in course delivery, grading, and tutoring sessions, enhancing students' learning experiences.

Authors:

Gizem Acar Stevens Institute of Technology
Bing Wu Stevens Institute of Technology