This paper presents an investigation on the applicability of shearography to characterize the location and depth of defects
in composite materials. Sets of specimens with artificial square flaws between the layers of a composite material have
been used for the experiments. Flaws with different sizes were placed at different depths along the thickness of the
material. Time-Average and Stroboscopic laser illumination have been applied together with vibrational loading.
The resonance frequencies were related to the depths of the different faults sizes. Frequency x depth results showed good
behavior for different defect sizes. These results encourages to further studies with other types of faults and composite
materials.
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