8 April 2009 Crack detection diagnostics using ultrasonic insonification and pattern recognition
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Abstract
Sudden crack growth has the potential to cause catastrophic failure when a crack reaches a critical crack size. Early detection of crack formation helps to minimize this potential. This research focuses on the use of guided ultrasonic waves (GUWs) to detect crack formation. Experiments are conducted on test specimens in which fatigue cracks are grown through cyclic loading. Macro Fiber Composite (MFC) and piezoelectric disc actuators are used as sensors to induce and receive various GUWs ranging in frequency from 25 to 100 kHz. Preliminary experimental results are given.
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Gregory J. S. Jarmer, Michael D. Todd, "Crack detection diagnostics using ultrasonic insonification and pattern recognition", Proc. SPIE 7295, Health Monitoring of Structural and Biological Systems 2009, 72950T (8 April 2009); doi: 10.1117/12.815393; https://doi.org/10.1117/12.815393
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KEYWORDS
Microsoft Foundation Class Library

Autoregressive models

Transducers

Sensors

Ultrasonics

Waveguides

Feature extraction

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