Damage Localisation in Thin Panels Using Elastic Wave Propagation Method


Article Preview

In this paper algorithm for damage localisation in thin panels made of aluminium alloy has been proposed. Mentioned algorithm uses Lamb wave propagation methods and geometrical approach for damage localisation. Elastic waves are generated and received using piezoelectric transducers. Excited elastic waves propagate and reflect from panel boundary and discontinuities existing in the panel. Wave reflection can be registered through the piezoelectric transducers and used in signal processing algorithm. Processing algorithm consists of two parts: signal filtering and extraction of damage location. The first part is used in order to remove noise from received signals. Second part allows to extract arrival time of waves reflected from discontinuity, very often called Time Of Flight (TOF). Localisation algorithm uses pairs of transducers from a concentrated transducers configuration. Using signals from pair of transducers two times of reflection can be extracted from received signals. Because coordinates of transducers are well known ellipse can be constructed based on extracted times of waves reflections. Damage lies one ellipse but it is not known exactly where. Therefore one ellipse is not enough to localise a discontinuity. In order of proper damage localisation more ellipses must be used. In this purpose signals received by larger number of transducers pairs are used in damage localisation algorithm. Points of ellipses intersections allow to indicate localisation of damage. Described signal processing algorithm has been coded in the MATLAB® environment. In this work experimental results has been presented.



Key Engineering Materials (Volumes 413-414)

Edited by:

F. Chu, H. Ouyang, V. Silberschmidt, L. Garibaldi, C.Surace, W.M. Ostachowicz and D. Jiang




T. Wandowski et al., "Damage Localisation in Thin Panels Using Elastic Wave Propagation Method", Key Engineering Materials, Vols. 413-414, pp. 87-93, 2009

Online since:

June 2009




[1] V. Giurgiutiu: Structural health monitoring with piezoelectric wafer active sensors, 16th International Conference of Adaptive Structures and Technologies ICAST, France, (2005).

[2] Z. Su, L. Ye, X. Bu: Composite Structures, Vol. 57(2002), p.465.

[3] Y. Lu, L. Ye, Z. Su: Smart Materials and Structures, Vol. 15(2006), p.839 D1 D2 D3 D4.

[4] P.S. Tua, S.T. Quek and Q. Wang: Smart Materials and Structures, Vol. 13(2004), p.643.

[5] J.B. Ihn, F. -K. Chang: Smart Material and Structures, Vol. 13(2004), p.609.

[6] J.B. Ihn, F. -K. Chang: Smart Materials and Structures, Vol. 13(2004), p.621.

[7] H. Sohn H., G. Park, j. R. Wait, N. P. Limback and C. R. Farrar: Smart Materials and Strurctures, Vol. 13(2004), p.153.

[8] P. Wilcox: IEEE Transactions on Ultrasonics, Ferroelectric, and Frequency Control, Vol. 50(2003), p.699.

[9] V. Giurgiutiu: Lamb wave generation with piezoelectric wafer active sensors for Structural Health Monitoring, Smart Structures and Materials - proceedings of the SPIE 5056, 111- 122, (2003).

DOI: https://doi.org/10.1117/12.483492

[10] V. Giurgiutiu, J. Bao: Structural Health Monitoring, Vol. 3(2004), p.121.

[11] G. Konstantinidis, P.D. Wilcox, B.W. Drinkwater: IEEE Sensors Journal, Vol. 7(2007), p.905.

[12] C. Wang, T. Rosej, F. -K. Chang: Smart Materials and Structures, Vol. 13(2004), p.415.

[13] S.G. Pierce, B. Culshaw, G. Manson, K. Worden, W.J. Staszewski: The application of ulstrasonic Lamb wave techniques to the evaluation of advanced composite structures, Smart Structures and Materials - Proceedings of SPIE 3986, 93-103, (2000).

DOI: https://doi.org/10.1117/12.388096

[14] K. Hongjoon, J. Kyungyoung, S. Minjea, K. Jaeyeol: NDT&E International, Vol. 39(2006), p.312.

[15] K. Hongjoon, J. Kyungyoung, S. Minjea, K. Jaeyeol: Ultrasonics, Vol. 44(2006), p.1265.

[16] D. E. Adams: Health Monitoring of Structural Materials and Components(John Willey & Sons, Ltd, 460 pages, 2007).

[17] T. Wandowski, P. Malinowski, W. Ostachowicz: Geometrical approach to damage localization in panels, Proc. of the 4th European Workshop on Structural Health Monitoring, pp.784-791, Cracow, Poland, (2008).