Journal of Theoretical
and Applied Mechanics

55, 2, pp. 481-496, Warsaw 2017
DOI: 10.15632/jtam-pl.55.2.481

Crack identification in plates using 1-D discrete wavelet transform

Anna Knitter-Piątkowska, Michal Guminiak, George Hloupis
In the present work, the defect detection while using Discrete Wavelet Transform in rectangular
plate structures is investigated. The plate bending is described by using the Boundary
ElementMethod with boundary integral equations formulated in a modified simplified approach.
The boundary elements of a constant type in a non-singular approach are implemented.
Defects are introduced by additional edges forming slots or holes in relation to the basic
plate domain. Estimation of the defect position is performed while using wavelet coefficients
of curvature and deformation signals as well as a newly proposed moving variance estimator.
Keywords: damage detection, crack, plates, wavelet transform, Boundary Element Method