DAMAGE DETECTION IN CFRP PLATES BY MEANS OF NUMERICAL MODELING OF LAMB WAVES PROPAGATION

Grzegorz Knor

Abstract: The paper presents an application of modeling acoustic waves propagation in a carbon fiber reinforced plastic (CFRP) plates for damage detection. This task is a part of non-destructive testing (NDT) methods which are very important in many industry branches. Propagation of Lamb waves is modeled using three-dimensional finite element method by means of commercial software. In the paper three different cases of plate structures with and without flaws are considered to present review of selected methods for the detection of defects in time and frequency domain. These are comparisons of: A-scans, B-scans, dispersion curves, spectrograms, scalograms and energy plots. Developed numerical model first has been validated by means of analytical solution for isotropic plate

Keywords: Lamb waves, non-destructive testing, finite element method, damage detection

DOI: https://doi.org/10.15623/ijret.2014.0312012