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Sparse spatial-partition probabilistic imaging method for debonding evaluation of composite wing leading edge using
Yuxi Zhang1, Qi Wu1, Hanqi Zhang2
1State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
Ultrasonics
|December 9, 2025
Summary
A new sparse spatial-partition probabilistic imaging method efficiently detects debonding in composite wing leading edges (CWLE) using ultrasonic guided waves. This technique offers accurate, baseline-free damage localization for critical aerospace components.
Area of Science:
- Aerospace Engineering
- Materials Science
- Non-Destructive Testing
Background:
- Composite Wing Leading Edges (CWLE) are critical for aircraft aerodynamics, especially in harsh environments.
- These complex, multi-layered structures are susceptible to debonding during manufacturing and service.
- Current ultrasonic C-scans are time-consuming, necessitating faster debonding evaluation methods for CWLE.
Purpose of the Study:
- To develop an efficient and accurate debonding evaluation method for Composite Wing Leading Edges (CWLE).
- To implement a novel sparse spatial-partition probabilistic imaging method for debonding localization.
- To address performance variations in PZT arrays and validate the method's effectiveness.
Main Methods:
- Utilized PZT arrays for excitation and reception in sparse regions of the CWLE.
- Developed a sparse spatial-partition probabilistic imaging method leveraging ultrasonic guided waves.
- Combined amplitude and arrival time for a guided wave damage index, incorporating path weight distribution for regional probability mapping.
Main Results:
- The proposed method achieved a debonding localization error of 5.02 mm, validated by CT scanning.
- Demonstrated superior damage localization accuracy and efficiency compared to conventional guided wave methods.
- Validated across different measurement areas on a large-scale CWLE, showing consistent accuracy.
Conclusions:
- The novel sparse spatial-partition probabilistic imaging method provides an efficient and accurate approach for debonding evaluation in CWLE.
- The technique is suitable for complex material structures and offers advantages like speed and baseline-free operation.
- This method enhances the safety and maintenance of aerospace components susceptible to structural damage.
