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TECHNICAL PAPERS

Active Monitoring for On-Line Damage Detection in Composite Structures

[+] Author and Article Information
Shenfang Yuan, Wang Lei, Lihua Shi

The Aeronautical Key Laboratory for Smart Materials and Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, Peoples Republic of China 210016

J. Vib. Acoust 125(2), 178-186 (Apr 01, 2003) (9 pages) doi:10.1115/1.1547464 History: Received November 01, 2001; Revised May 01, 2002; Online April 01, 2003
Copyright © 2003 by ASME
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References

Figures

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Honeycomb sandwich specimens with simulated delamination
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Active monitoring signal under half-sine wave actuation
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Actively monitored signal under rectangular impulse actuation
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Frequency analysis results of active monitoring signal under 400 ns-wide impulse
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Frequency analysis results of active monitoring signal under 10 μs-wide impulse
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Tree decomposition algorithm of wavelet analysis
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Actuating signal and active monitoring signal of beam specimen
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Signal after postprocessing of beam specimen
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Signal after processing of plate specimen
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A set of time domain wave of active monitoring signal of a beam specimen
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A set of frequency spectrums of monitored signal after differentiation
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Active monitoring signal obtained from honey comb specimens before and after impact damage
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Frequency spectrum of active monitoring signal of honey comb specimens before and after impact damage
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Active monitoring signal of carbon fiber composite specimen
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Square curve fitting results
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Comparison of active monitored signal waveform
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Real-time composite damage active monitoring system

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