Funct. Mater. 2019; 26 (2): 436-440.
Comparative study of different infrared thermal wave imaging techniques for defect detection of composite materials
School of Physical and Telecommunication Engineering, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, China
In this paper, the basic principles of pulse infrared thermal wave imaging technology and phase-locked infrared thermal wave imaging technology in the defect detection of composite materials were briefly introduced. Then, the defect detection of Carbon Fiber Reinforced Plastics (CFRP) laminates was carried out by using pulse infrared nondestructive testing system and phase-locked infrared nondestructive testing system. The results showed that both methods could detect the defect inside the laminates, but the phrase image of phase-locked testing technology was clearer and more detailed. Pulse infrared nondestructive testing was more suitable for rapid detection of defects in composite materials with high temperature resistant surface, while phase-locked infrared nondestructive testing technology was more suitable for the composite materials whose surface can not withstand high-power illumination.
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