Título:	Damage indices evaluation for one-dimensional guided wave-based structural health monitoring
Autor(es):	Barreto, Lucas S. Machado, Marcela Rodrigues Santos, Juliana Cardoso Moura, Braion Barbosa de Khalij, Leila
ORCID:	http://orcid.org/0000-0001-9340-6330 http://orcid.org/0000-0002-7488-7201 http://orcid.org/0000-0003-0459-8655 http://orcid.org/0000-0003-0314-730X http://orcid.org/0000-0002-7058-0544
Assunto:	Quantificação de danos Método do elemento espectral Propagação de ondas Índice de danos
Data de publicação:	2021
Editora:	Associação Brasileira de Ciências Mecânicas
Referência:	BARRETO, Lucas S. et al. Damage indices evaluation for one-dimensional guided wave-based structural health monitoring.Latin American Journal of Solids and Structures, Rio de Janeiro, v. 18, n. 2, e354, 2021. DOI: https://doi.org/10.1590/1679-78256292. Disponível em: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-78252021000200507&lng=en&nrm=iso. Acesso em: 29 mar. 2021. Epub Mar 19, 2021.
Abstract:	Damage detection in structures and systems is essential for monitoring parameters that can affect their integrity. This paper evaluates the efficiency of four damage indices (DIs) commonly used with temporal wave signals. The root mean square deviation, mean absolute percentage deviation, covariance, and correlation coefficient deviation DIs are presented, and a normalization is then proposed. An Euler-Bernoulli beam is used as a guided wave modelled with the spectral element method and excited by a toneburst signal. It includes the theoretical background of the throw-off beam, undamaged and cracked beam spectral elements. The DIs for a single crack position and a map varying crack depth and positions are calculated with deterministic and random temporal signal responses derived from noise addition. Results showed that DIs could identify and quantify the damage conditioned to the pulse location point and the influence of noise in the estimation, which leads in an analysis comparable to practical applications.
Licença:	(CC BY) - Latin American Journal of Solids and Structures. ISSN 1679-7825. Copyright © 2021. This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
DOI:	https://doi.org/10.1590/1679-78256292
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