Structural damage detection using combined finite-element and model Lamb wave propagation parameters

Abstract

This article presents a combined finite-element and model Lamb wave propagation parameters method for structural health monitoring. Modal analysis allows identifying the mode conversions induced by the defects. A simulation combining a planar, lossless finite-element analysis with Lamb wave propagation parameter is proposed. This analysis is performed on two aluminium bars in both undamaged and damaged states, where the two damaged states are: (a) one having a circular hole and (b) the other having a cut partway through the bar, perpendicular to the long axis of the bar. The Lamb wave propagation parameters are calibrated by using the ultrasonic pulse generator test set-up. The natural frequencies for the theoretical, finite element and experimental results are compared, and close agreement is found between the frequencies obtained experimentally and computationally.

Keywords

Lamb wave propagation parameters damage detection structural health monitoring

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References

Kostopoulos

Loutas

T. H.

Kontsos

Sotiriadis

Pappas

Y. Z.

, ‘On the identification of the failure mechanisms in oxide/oxide composites using acoustic emission’ NDT&E Int. 36 8 (2003): 571–580.

Ohtsu

Ono

, ‘Pattern recognition analysis of acoustic emission from uni-directional carbon—fibre epoxy composites by using autoregressive modeling’ J. Acoust. Emiss. 6 1 (1998): 61–71.

Pappas

Y. Z.

Markopoulos

Y. P.

Kostopoulos

, ‘Failure mechanisms analysis of 2D carbon/carbon using acoustic emission monitoring’ NDT&E Int. 31 3 (1998): 157–163.

Mizutani

Nagashima

Takemoto

Ono

, ‘Fracture mechanism characterization of cross-ply carbon fibre composites using acoustic emission analysis’ NDT&E Int. 33 (2000): 101–110.

Groot

P. J.

Winjen

P. A.

Janseen

B. F.

, ‘Real-time frequency determination of acoustic emission for different fracture mechanisms in carbon/epoxy composites’ Compos. Sci. Technol. 55 (1995): 405–412.

Barre

, ‘On the use of acoustic emission to investigate damage mechanisms in glass—fibre-reinforced polypropylene’ Compos. Sci. Technol. 52 (1994): 369–376.

Vaidya

U. K.

Raju

P. K.

, ‘Identification of failure modes of carbon—carbon composites at various processing stages using the acoustic emission technique’ NCA-V. 16/AMD 172 (1993): 153–61.

Grahn

, ‘Lamb wave scattering from a circular partly throughthickness hole in a plate’ Wave Motion 37 (2003): 63–80.

Castaings

Le Clezio

Hosten

, ‘Modal decomposition method for modeling the interaction of Lamb waves with cracks’ J. Acoust. Soc. Am. 112 6 (2002): 2567–2582.

10.

Diligent

Lowe

M. J. S.

Cawley

, ‘Reflection and scattering of the S0 Lamb mode from circular defects in plates’ Rev. Prog. Quant. Nondestruct. Eval. 20 (2001): 134–141.

11.

Alleyne

D. N.

Cawley

, ‘The interaction of Lamb waves with defects’ IEEE Trans., Ultrason. Ferroelectr. Freq. Control 39 (1992): 381–397.

12.

Guo

Cawley

, ‘The interaction of Lamb waves with delaminations in composite laminates’ J. Acoust. Soc. Am. 94 4 (1993): 2240–2246.

13.

Galan

J. M.

Abascal

, ‘Boundary element solution for the bidimensional scattering of guided waves in laminate plates’ Comput. Struct. 83 (2005): 740–757.

14.

McIntire

Ed., Nondestructive testing handbook (Columbus: American Society for Nondestructive Testing 1991): 398–402.

15.

Krautkramer

, Ultrasonic testing of materials (Berlin, Heidelberg, New York: panametrics-NDT 1983): 580–587.

16.

Lynnworth

L. C.

Papadakis

E. P.

Fowler

K. A.

, ‘Ultrasound propagation easurements and applications’ Int. Adv. Nondestruc. Test. 5 (1977): 71–115.

17.

Lynnworth

L. C.

, ‘Acoustical nomograms for the elastic properties of engineering materials’ Ultrasonics (1969): 254–256.