Development of Magnetically Tunable Metastructures

• Grant number: 25/00537-1
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: April 01, 2025
• End date: June 30, 2026
• Field of knowledge: Engineering - Mechanical Engineering - Mechanics of Solids
• Principal Investigator: Paulo José Paupitz Gonçalves
• Grantee: Camila Albertin Xavier da Silva
• Host Institution: Faculdade de Engenharia (FE). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil
• Associated research grant: 18/15894-0 - Periodic structure design and optimization for enhanced vibroacoustic performance: ENVIBRO, AP.TEM

Abstract

Metamaterials offer significant advantages over traditional materials in various engineering applications, especially in vibration control, due to their ability to form and adjust bands at specific frequencies (bandgaps). With the increasing demand for dynamic wave control, metamaterials have gradually evolved from passive to active systems. Active metamaterials utilize smart materials that stand out for their ability to adjust structural and mechanical properties, such as stiffness, damping, and resonance frequency. Among semi-active metamaterials, magnetorheological elastomers (MREs) stand out as intelligent composites composed of a viscoelastic matrix combined with ferromagnetic particles. Under the influence of an external magnetic field, these materials can substantially alter their dynamic properties, such as the elastic modulus, directly affecting the material's stiffness. In this context, this project aims to develop locally resonant metamaterials through adaptively tuned vibration absorbers, using Magnetorheological Elastomers (MREs). The proposed approach enables tuned and adaptive control, providing the absorber with localized resonance capabilities. This feature facilitates the formation of locally resonant and adaptive frequency bands, directly influenced by the external magnetic field. The research encompasses analytical modeling, numerical simulations, and experimental validations to evaluate the dynamic performance of the developed metamaterial. This study contributes to the development of new adaptive materials and structures, offering innovative approaches for vibration control and wave manipulation in engineering applications.