Locally resonant metamaterials with shape-memory alloy springs

Autor(es)

de Sousa, Vagner Candido ; Sugino, Christopher ; De Marqui Junior, Carlos ; Erturk, Alper ; Erturk, A ; Han, JH

• Tipo de documento: Artigo Científico
• Fonte: ACTIVE AND PASSIVE SMART STRUCTURES AND INTEGRATED SYSTEMS XII; v. 10595, p. 12-pg., 2018-01-01.

Resumo

Locally resonant metamaterials offer bandgap formation for wavelengths much longer than the lattice size, enabling low-frequency and wideband vibration attenuation. Acoustic/elastic metamaterials made from resonating components usually do not exhibit reconfigurable and adaptive characteristics since the bandgap frequency range (i.e. target frequency and bandwidth combination) is fixed for a given mass ratio and stiffness of the resonators. In this work, we explore locally resonant metamaterials that exploit shape-memory alloy springs in an effort to develop adaptive metamaterials that can exhibit tunable bandgap properties. An analytical model for locally resonant metastructures (i.e. metamaterials with specific boundary conditions) is combined with a shape-memory spring model of the resonator springs to investigate and exploit the potential of temperature-induced phase transformations and stress-induced hysteretic behavior of the springs. Various case studies are presented for this new class of smart metamaterials and metastructures. (AU)

• Processo FAPESP: 17/08467-6 - Efeitos de elementos com memória de forma sobre o comportamento de sistemas aeorelásticos e metamateriais adaptativos
• Beneficiário: Vagner Candido de Sousa
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 15/26045-6 - Efeitos de elementos com memória de forma sobre o comportamento de sistemas aeroelásticos e metamateriais adaptativos.
• Beneficiário: Vagner Candido de Sousa
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado