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Frequency‐bounded Delay and Sum: A modified Damage Detection Method in thin‐walled Plates
Author(s) -
Sattarifar Afshin,
Nestorović Tamara
Publication year - 2019
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201900368
Subject(s) - dependency (uml) , lamb waves , finite element method , measure (data warehouse) , bounded function , acoustics , structural engineering , materials science , computer science , wave propagation , mathematical analysis , physics , mathematics , engineering , optics , software engineering , database
The delay‐and‐sum (DaS) methodology is implemented in the current study to depict the probability of damage presence on an aluminum plate. Compared to previous researches, the introduced modification in this work attempts to decrease the dependency of the method on the chosen frequency. Firstly, the propagation of the Lamb waves in the plate is modeled numerically employing commercial finite element package, ABAQUS. Additionally, an experimental setup is built, in which piezo patches are utilized to excite the Lamb wave and to measure the corresponding response on the plate as well. Analysis of the experimental results shows the feasibility of the method for damage detection.