Laser Ultrasonic Testing(LUT)holds great promise for industrial applications,particularly in Nondestructive Testing(NDT)of aerospace composites.It offers advantages such as non-contact,high-resolution,and real-time de...Laser Ultrasonic Testing(LUT)holds great promise for industrial applications,particularly in Nondestructive Testing(NDT)of aerospace composites.It offers advantages such as non-contact,high-resolution,and real-time defect detection.Traditional NDT methods struggle with the complex shapes of structural parts and in-situ testing,limiting their detection efficiency and sensitivity.We review the principles of excitation,optical detection,and laser parameter selection for LUT.It also compares applicability of LUT with other NDT techniques.We discuss strengths and limitations of LUT in detecting defects,characterizing material properties,and monitoring the health of aerospace composites.LUT has proven effective in detecting defects in aerospace materials under extreme conditions such as high temperature and pressure during manufacturing and service.However,challenges remain in defect localization,rapid identification,signal extraction in noisy environments,and micro-defect characterization.Despite these limitations,LUT stands out for its non-contact real-time capabilities and its ability to detect defects in harsh industrial conditions.This paper enhances the understanding for potential and future development of LUT,including improvements in laser generators,non-contact inspection equipment,modular inspection device design,and high-accuracy real-time inspection technologies.展开更多
基金co-supported by the Natural Science Foundation of China(NSFC)(Nos.52305139 and 52175124)Zhejiang Provincial Natural Science Foundation,China(Nos.LQ23E050017 and LZ21E050003)+1 种基金the Fundamental Research Funds for the Provincial Universities of Zhejiang,China(No.RF-A2024001)the China Postdoctoral Science Foundation(No.2025M771342)。
文摘Laser Ultrasonic Testing(LUT)holds great promise for industrial applications,particularly in Nondestructive Testing(NDT)of aerospace composites.It offers advantages such as non-contact,high-resolution,and real-time defect detection.Traditional NDT methods struggle with the complex shapes of structural parts and in-situ testing,limiting their detection efficiency and sensitivity.We review the principles of excitation,optical detection,and laser parameter selection for LUT.It also compares applicability of LUT with other NDT techniques.We discuss strengths and limitations of LUT in detecting defects,characterizing material properties,and monitoring the health of aerospace composites.LUT has proven effective in detecting defects in aerospace materials under extreme conditions such as high temperature and pressure during manufacturing and service.However,challenges remain in defect localization,rapid identification,signal extraction in noisy environments,and micro-defect characterization.Despite these limitations,LUT stands out for its non-contact real-time capabilities and its ability to detect defects in harsh industrial conditions.This paper enhances the understanding for potential and future development of LUT,including improvements in laser generators,non-contact inspection equipment,modular inspection device design,and high-accuracy real-time inspection technologies.
