PSI - Issue 37

ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000 Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceD rect Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 37 (2022) 292–298

© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Pedro Miguel Guimaraes Pires Moreira Abstract Identification of a structural damage becomes critically important step of proper maintenance of structural elements being in operation according to the widely accepted damage tolerance philosophy in numerous industrial branches related to the construction engineering. Within the variety of available testing methods, vibration-based methods, due to their effectiveness and low cost, are used in such inspection. However, to detect small or early damage in structures, additional processing of the measurement results is necessary. In this paper, two principally different approaches of damage identification in composite plates based on the damage indices and the curvelet transform were analyzed and compared in the light of evaluation of sensitivity to damage, robustness to measurement and processing noise, and accuracy of estimation of a damage. The obtained results of this comparative study clearly indicate the superiority of the curvelet transform, which allowed not only properly identify damage thanks to the enhanced directional selectivity, but simultaneously reduce measurement noise, which makes it an excellent candidate for effective identification of damage in various engineering structures. © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Abstract Identification of a structural damage becomes critically important step of proper maintenance of structural elements being in op ration according o the widely acc pt d damage olerance hilosophy in numerous industri l branches related to th constructio engineering. Within the variety of available testing m thods, vibration-based thods, e to their eff ctiven ss and low cost, are used in such inspection. However, to detect small or arly damage n structures, ad itional proc ssing of the me surement results is neces ary. I this paper, t o p incipally different app oaches of damage id ntification in compo te pla es based on the damage ndices and the curvelet transform were analyzed and compared in the light of evaluation of sensit vity to damage, robustness to measurement and proc ssing n ise, and accuracy of estimation of a dama e. The obtained results of this c mpar tive study clearly indicat the superiority of the curvelet transform, which allowed not only pr perly i entify damage thanks to the enhanced dire tional selectivity, but simultan ously reduce measurement noise, which makes it an excellent c didate for effective identification of damage in vario s engineering structure . © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review u der responsibility of Pedro Miguel Guimara s Pires Moreira K ywords: damage identification; damage indices; c rvelet transform; modal analysis ICSI 2021 The 4th International Conference on Structural Integrity Effectiveness of damage identification in composite plates using damage indices based on smoothing polynomials and curvelet transform: A comparative study Andrzej Katunin a, *, Sandris Ručevskis b a Department of Fundamentals of Machinery Design, Silesian University of Technology, Konarskiego 18A, Gliwice 44-100, Poland b Institute of Materials and Structures, Riga Technical University, Kipsalas iela 6A, Riga LV-1048, Latvia ICSI 2021 The 4th International Conference on Structural Integrity Effectiveness of damage identification in composite plates using damage indices based on smoothing polynomials and curvelet transform: A comparative study Andrzej Katunin a, *, Sandris Ručevskis b a Department of Fundamentals of Machinery Design, Silesian University of Technology, Konarskiego 18A, Gliwice 44-100, Poland b Institute of M terials nd Structures, Riga Technical University, Kipsalas iela 6A, Ri a LV-1048, Latvia Peer-review under responsibility of Pedro Miguel Guimaraes Pires Moreira Keywords: damage identification; damage indices; curvelet transform; modal analysis

* Corresponding author. Tel.: +48-32-237-1069; fax: +48-32-327-1360. E-mail address: andrzej.katunin@polsl.pl * Corresponding author. Tel.: +48-32-237-1069; fax: +48-32-327-1360. E-mail address: andrzej.katunin@polsl.pl

2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Pedro Miguel Guimaraes Pires Moreira 2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review u der responsibility of Pedro Miguel Guimara s Pires Moreira

2452-3216 © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Pedro Miguel Guimaraes Pires Moreira 10.1016/j.prostr.2022.01.087