IMAGE-BASED STRUCTURAL HEALTH MONITORING OF COMPOSITE STRUCTURES

摘要

The paper describes different image-basedtechniques that can be used for nondestructiveinspection of composites. The focus is on fourapproaches: pulsed thermography,vibrothermography, laser Doppler vibrometryand shearography. All of the considered testtechniques offer full field inspection capabilityand straightforward interpretation of testresults. Structural damage can be identifiedfrom an image where the presence and thelocation of damage is readily available. Thesefactors, together with a relatively simplemeasurement setup and short measurementtimes, make the considered techniques veryattractive for industrial applications. In thisstudy the experiments are performed onlaminated composite samples. Both carbon fiberand glass fiber composites are considered. Thepaper describes the diagnostic procedures andinspection results for the consideredmeasurement techniques.