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Fatigue-Crack Detection in a Multi-Riveted Strap-Joint Aluminium Aircraft Panel Using Amplitude Characteristics of
Frank H G Stolze1, Keith Worden1, Graeme Manson1
1Department of Mechanical Engineering, Sheffield University, Mappin St., Sheffield S1 3JD, UK.
Materials (Basel, Switzerland)
|February 25, 2023
Summary
This study uses diffused Lamb waves for fatigue crack detection in aircraft panels. The method shows promise for monitoring complex aircraft structures.
Area of Science:
- Aerospace Engineering
- Materials Science
- Non-Destructive Testing
Background:
- Structural health monitoring (SHM) of riveted aircraft panels presents significant challenges for maintenance.
- Fatigue cracks in aircraft components can compromise structural integrity and safety.
- Existing methods may struggle with the complexity of multi-riveted joints.
Purpose of the Study:
- To investigate the efficacy of diffused Lamb wave fields for detecting fatigue cracks in riveted aircraft panels.
- To evaluate the use of piezoceramic transducer networks for damage detection.
- To assess the potential of Lamb wave amplitude characteristics and statistical analysis for identifying fatigue damage.
Main Methods:
- Instrumentation of a multi-riveted aircraft panel with surface-bonded piezoceramic transducers.
- Generation and analysis of diffused Lamb wave fields across the panel.
- Extraction of damage-sensitive features from Lamb wave amplitude characteristics.
- Application of statistical outlier analysis for damage detection.
- Utilizing the Local Interaction Simulation Approach (LISA) for modeling wave scattering from crack tips.
Main Results:
- Demonstrated the capability of diffused Lamb waves to detect fatigue cracks in a complex riveted panel.
- Identified specific Lamb wave amplitude characteristics indicative of fatigue damage.
- Statistical outlier analysis proved effective in highlighting anomalies associated with damage.
- Simplified modeling provided insights into complex wave scattering phenomena.
Conclusions:
- Diffused Lamb wave fields offer a viable approach for fatigue crack detection in riveted aircraft components.
- The method shows potential for enhancing structural health monitoring in aviation.
- Further research is needed to fully address the limitations in complex structural applications.
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