Comparative study of active infrared thermography, laser vibrometry and laser ultrasonic techniques in application to the inspection of graphite/epoxy composite parts

摘要

Three nondestructive testing techniques, namely, active infrared thermography, laser vibrometry and laser ultrasound, have been comparatively applied in the inspection of a graphite epoxy sample characterized by a complicated geometry to demonstrate advantages and drawbacks of each technique in the detection of various types of defects.