Lamb wave inspection using piezoelectric diaphragms: An initial feasibility study

Autor(es)

Campeiro, Leandro Melo ^[1] ; Budoya, Danilo Ecidir ^[1] ; Baptista, Fabricio Guimaraes ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Sch Engn, Dept Elect Engn, BR-17033360 Bauru, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: SENSORS AND ACTUATORS A-PHYSICAL; v. 331, NOV 1 2021.
• Citações Web of Science: 0

Resumo

Lamb wave-based inspection has been extensively investigated and reported in the literature as a non-destructive technique in structural health monitoring and other applications. The generation and reception of Lamb waves are typically performed with piezoelectric ceramics operating as actuators and sensors, respectively. This article presents a study of the feasibility of piezoelectric diaphragms as an alternative transducer, allowing to expand the research as well as to accelerate the implementation of Lamb wave-based SHM systems with lower installation costs. Piezoelectric diaphragms are sound components widely used in everyday electronic devices and, in addition to the low cost, they have the advantage of being mass-produced by different manufacturers in standard sizes and are readily avail-able. To assess the feasibility of these components, basic analysis by finite element method (FEM) and experimental tests were carried out on aluminum plates and the results obtained with the diaphragms were compared with those obtained using conventional piezoelectric ceramics. Structural damage was simulated by making cracks and drilling holes in the structure and an imaging algorithm together with damage index based on the wavelet transform was used to detect and locate damage. In addition, tests were carried out to evaluate and compare the reproducibility of the results and the effects of temper-ature variation on the two types of transducers. FEM and experimental results show that piezoelectric diaphragms are feasible for generating and receiving Lamb waves, as well as detecting structural dam-age. Therefore, these commercial sound components can also be alternative transducers for applications involving Lamb waves. (c) 2021 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 18/13200-1 - Detecção de dano estrutural em ambientes ruidosos baseada na impedância eletromecânica e ondas de Lamb com transdutores piezelétricos excitados com sinais de alta frequência
• Beneficiário: Leandro Melo Campeiro
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 17/23157-3 - Monitoramento de Integridade Estrutural Usando Transdutores Piezelétricos Excitados com Sinais de Alta Frequência
• Beneficiário: Fabricio Guimarães Baptista
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 18/09312-9 - Técnicas de medição e aquisição de sinais de transdutores piezelétricos excitados com sinais de alta frequência no monitoramento de integridade estrutural
• Beneficiário: Danilo Ecidir Budoya
• Modalidade de apoio: Bolsas no Brasil - Doutorado