• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2025, Vol. 61 ›› Issue (2): 24-35.doi: 10.3901/JME.2025.02.024

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Debonding Damage Identification Method for Metal-Organic Material Laminated Structure

ZHANG Chao, WANG Hongyuan, JI Hongli, ZHU Lichen, QIU Jinhao   

  1. State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016
  • Received:2024-01-03 Revised:2024-07-21 Published:2025-02-26

Abstract: Metal-organic material laminated structure not only has the excellent mechanical properties, but also shows the functional integration, complex shapes and lightweight. Since the bonding quality determines the safety and reliability of the structure, an effective non-destructive testing method is urgently required to evaluate the debonding damage in the laminated structure. A debonding damage imaging method based on frequency band selection is presented. By using the laser ultrasonic technique, the proposed method can identify the debonding damage in metal-organic material laminate structures. Firstly, through the experimental study, it can be found that the guided wave signals with different frequencies have different sensitivity to the debonding damage in metal-organic material laminated structure. Then, an adaptive guided wave frequency selection algorithm is developed. By extracting the difference between the guided wave energy distribution in the debonding and healthy areas, the different debonding damages in the laminated structure with different metal-organic materials can be identified. The results show that the proposed detection method has significantly improved the resolution of damage imaging.

Key words: debonding damage, non-destructive testing, laser ultrasonic, laminated structure

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