Journal
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
Volume 31, Issue 8, Pages 629-643Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1460-2695.2008.01252.x
Keywords
damage detection; Lamb waves; outlier analysis
Funding
- European Union [AST3-CT-2004-502725]
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This work presents a damage detection study of a curved aluminium panel using the statistical technique of outlier analysis, where the structure was investigated using ultrasonic Lamb waves. These waves were generated by large custom-made piezoceramic patches and were sensed by smaller piezoceramic sensors surrounding each patch. The patches were mounted using the viscoelastic material Araldite 2027 and damage was added to the plate in the form of drilled holes and saw cuts increasing in length. Outlier analysis was successfully able to distinguish between the damaged and undamaged cases with a very high classification rate of over 99%, and was also able to approximate the direction from the actuator patch in which the damage lay.
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