Classification-based Damage Localization in Composite Plate using Strain Field Data
Journal of Physics: Conference Series 2018
Rims Janeliukštis, Sandris Ručevskis, Andris Čate

Problem of damage localization in a cantilevered composite plate using strain data is tackled. The plate is partitioned into a number of zones and a mass equal to 9.43 % of plate's mass is put in each of these zones subsequently. The composite plate is harmonically excited via piezoelectric actuator with a series of driving frequencies equal to natural frequencies of the plate extracted in modal analysis test. In each of these events, the mechanical strains are recorded with strain gauges. Mean values of strain time series are calculated and used as a feature for building a classification model in which zones of the plate serve as classes. Linear discriminant classifier initially yielding the best classification accuracy (90.7 %) is selected. The classification model is validated by selecting 5 query points on the plate and localizing the unknown query points in terms of classes (zones) of the plate. Overall, the unknown query points were classified successfully with only slight misclassification for the point at the boundary between 2 zones.


Keywords
composite plate; damage; classification; localiation
DOI
10.1088/1742-6596/1106/1/012022
Hyperlink
http://iopscience.iop.org/article/10.1088/1742-6596/1106/1/012022

Janeliukštis, R., Ručevskis, S., Čate, A. Classification-based Damage Localization in Composite Plate using Strain Field Data. Journal of Physics: Conference Series, 2018, Vol. 1106, No. 1, pp.1-8. ISSN 1742-6588. e-ISSN 1742-6596. Available from: doi:10.1088/1742-6596/1106/1/012022

Publication language
English (en)
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