Research Article
Guided Wave Energy Transfer in Composite Sandwich Structures and Application to Defect Detection
Figure 4
Wave pattern at the excitation frequency 75 kHz in different regions of the plate for (I) t = 0.09 ms, (II) t = 0.15 ms, (III) t = 0.21 ms, and (IV) t = 0.27 ms. The dotted lines show the approximate location of the laminate skins, and the arrows show the direction of propagation.