Damage Assessment of Multi-Layered Composite Structure Using an Embedded Active Sensor Network

Abstract:

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Targeted at improving the overall integrity of functionalised composite structure, an embedded sensor network technique was developed using circuited piezoelectric wafers. The technical difficulties due to sensor embedment, such as electrical insulation, were addressed. With Hilbert transform-based signal processing and a correlation-based identification algorithm, Lamb wave signals, excited and captured by the integrated sensor network, were evaluated for damage assessment. Effectiveness of the sensor network and proposed identification algorithm was demonstrated by identifying delamination in orthotropic woven fabric CF/EP composite laminates. Excellent identification capacity of the built-in sensor network indicates its considerable application potential in providing high-fidelity data acquisition/condition monitoring for composite structures.

Info:

Periodical:

Key Engineering Materials (Volumes 334-335)

Edited by:

J.K. Kim, D.Z. Wo, L.M. Zhou, H.T. Huang, K.T. Lau and M. Wang

Pages:

461-464

Citation:

Z. Q. Su et al., "Damage Assessment of Multi-Layered Composite Structure Using an Embedded Active Sensor Network", Key Engineering Materials, Vols. 334-335, pp. 461-464, 2007

Online since:

March 2007

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Price:

$38.00

[1] Y.L. Koh, N. Rajic, W.K. Chiu and S. Galea: Comp. Struct. 47(1999), p.745.

[2] M. Lin and F. -K. Chang: Comp. Sci. Tech. 62(2002), p.919.

[3] C. Boller: Smart Mater. Struct. 10(2001), p.432.

[4] Z. Su and L. Ye: J. Intel. Mater. Sys. Struct. 16(2005), p.97.

[5] W. Staszewski, C. Boller and G. Tomlinson: Health Monitoring of Aerospace Structures (Wiley, England, 2004).

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[1] 0 Normalised Amplitude Time � s@ Delaminated Plate Fig. 3 de-noised Lamb wave signals of benchmark (left) and delaminated (right) plates.

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[1] 0 Delaminated Plate Normalised Amplitude Time � µµµµs@ Fig. 4 Energy distribution of Lamb wave signals described in Fig. 3.

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[1] 0 Time Difference ∆∆∆∆T [s] Correlation Coefficient Delaminated Plate.

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[1] 4 Ratio of Correlation Coefficient Time Difference ∆∆∆∆T [s] Fig. 5 Correlation curve of energy envelope for signals in Fig. 4. Fig. 6. Correlated ratio of delaminated to benchmark plates.

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