Prediction and Measurement of Lamb Wave from Debondings at Structural Features in Composite Laminates

Abstract:

The interaction of the fundamental anti-symmetric Lamb wave (A₀) with debondings at structural features is investigated using experimental data and finite element (FE) simulations. In this study explicit three-dimensional (3D) FE simulations are employed, which allows the study of the scattered wave along different propagation directions. Good agreement between the FE predictions and the measurements are obtained that demonstrates that the 3D FE scattering model is able to accurately predict the Lamb wave scattering characteristics at debondings. The study show that the characteristics of Lamb wave reflected from the debondings at the structure feature is much more complicated than that from defects in flat composite laminates. Parameter studies show that the backward and forward scattering coefficient of Lamb wave is a function of debonding size to wavelength ratio and debonding location. This shows the potential of employing Lamb wave to identify the size and monitor the growth of the debondings. The findings of the study provide improved physical insights into the scattering phenomena, which are important to further advance damage detection techniques for complex structures made by composite laminates.

• Periodical: Key Engineering Materials (Volume 558)
• Pages: 139-148
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.558.139
• Online since: June 2013
• Authors: Ching Tai Ng, Martin Veidt
• Keywords: Composite Laminate, Debonding, Finite Element, Lamb Wave, Scattering

References

[1] W.J. Staszewski, C. Boller, G. Tomlinson, Health monitoring of aerospace structures: smart sensor technologies and signal processing, Wiley, West Sussex, UK, 2004.

DOI: 10.1002/0470092866

[2] H.F. Lam, C.T. Ng, Multicrack detection on semirigidly connected beams utilizing dynamic data, J. Eng. Mech. ASCE, 134 (2008) 90-99.

DOI: 10.1061/(asce)0733-9399(2008)134:1(90)

[3] M. Veidt, A.H. Rohde, C.T. Ng, S. Hames, Imaging laminar damage using plate wave ultrasonics and proposed methodology for designing optimal transducer networks, Mater. Forum, 33 (2008) 293-301.

[4] H. Shih, D.P. Thambiratnam, T.H. Chan, Vibration based structural damage detection in flexural members using multi-criteria approach, J. Sound Vib. 323 (2009) 645-661.

DOI: 10.1016/j.jsv.2009.01.019

[5] C.T. Ng, M. Veidt, H.F. Lam, Guided wave damage characterisation in beams utilising probabilistic optimisation, Eng. Struct., 31 (2009) 2842-2850.

DOI: 10.1016/j.engstruct.2009.07.009

[6] Y. Wang, H. Hao, Damage identification of steel beams using local and global methods, Adv. Struct. Eng. 15 (2012). 807-824.

[7] Y.S. Song, J.R. Youn, T.G. Gutowski, Life cycle energy analysis of fiber-reinforced composites: Compos. Part A, 40 (2009) 1257-1265.

DOI: 10.1016/j.compositesa.2009.05.020

[8] K. Diamanti, C. Soutis, J.M. Hodgkinson, Piezoelectric transducer arrangement for the inspection of large composite structures, Compos. Part A, 38 (2004) 1121-1130.

DOI: 10.1016/j.compositesa.2006.06.011

[9] H. Sohn, G. Park, J.R. Wait, N.P. Limback, C.R. Farrar, Wavelet-based active sensing for delamination detection in composite structures, Smart Mater. Struct. 13 (2004) 153-160.

DOI: 10.1088/0964-1726/13/1/017

[10] M. Veidt, C.T. Ng, S. Hames, T. Wattingeer, Imaging laminar damage in plate using Lamb wave beamforming, Adv. Mater. Res., (2008) 666-669.

DOI: 10.4028/www.scientific.net/amr.47-50.666

[11] C.T. Ng, M. Veidt, N. Rajic, Integrated piezoceramic transducers for imaging damage in composite laminates, Proc. of SPIE, 7493 (2009) 74932M.

DOI: 10.1117/12.840150

[12] T. Wandowski, P. Malinowski, P. Kudela, W. Ostachowicz, Guided wave-based detection of delamination and matrix cracking in composite laminates, J. Mech. Eng. Sci. 225 (2011) 123-131.

DOI: 10.1243/09544062jmes1907

[13] V. Giurgiutiu, Piezoelectric wafer active sensors for structural health monitoring of composite structures using tuned guided waves, J. Eng. Mater. Tech., 133 (2011) 041012-1-6.

DOI: 10.1115/1.4004698

[14] V. Giurgiutiu, C. Soutis, Enhanced composites integrity through structural health monitoring, Appl. Compos. Mater., (2012), online first

DOI: 10.1007/s10443-011-9247-2

[15] K. Diamanti, J.M. Hodgkinson, C. Soutis, Detection of low-velocity impact damage in composite plates using Lamb waves, Struct. Health. Monitor. 3 (2004) 33-41.

DOI: 10.1177/1475921704041869

[16] M. Veidt, C.T. Ng, Influence of stacking sequence on scattering characteristics of the fundamental anti-symmetric Lamb wave at through holes in composite laminates, J. Acoust. Soc. Am., 129 (2011), 1280-1287.

DOI: 10.1121/1.3533742

[17] C.T. Ng, M. Veidt, Scattering of fundamental anti-symmetric Lamb wave at delaminations in composite laminates, J. Acoust. Soc., Am. 129 (2011) 1288-1296.

DOI: 10.1121/1.3533741

[18] C.T. Ng, M. Veidt, L.R.F. Rose, C.H. Wang, Analytical and finite element prediction of Lamb wave scattering at delamination s in quasi-isotropic composite laminates, J. Sound. Vib. 331 (2012). 4870-4883.

DOI: 10.1016/j.jsv.2012.06.002

[19] F. Lanza di Scalea, H. Matt, I. Bartoli, S. Coccia, G. Park, C. Farrar, Health monitoring of UAV wing skin-to-spar joints using guided waves and macro fiber composite transducers, J. Intell. Mater. Syst. Struct. 18 (2007). 373-388.

DOI: 10.1177/1045389x06066528

[20] Y.L. Koh, W.K. Chiu, N. Rajic, Integrity assessment of composite repair patch using propagating Lamb waves, Compos. Struct. 58 (2002) 363-371.

DOI: 10.1016/s0263-8223(02)00197-6

[21] C. Soutis, K. Diamanti, A Lamb wave based SHM of repaired composite laminated structures, The 2nd Interl. Symp. on NDT in Aerospace, We.2.B.1 (2010) 1-10.

[22] C.T. Ng, M. Veidt, Scattering characteristics of Lamb waves from debondings at structural features in composite laminates, J. Acout. Soc. Am., 132 (2012) 115-123.

DOI: 10.1121/1.4728192

[23] C.T. Ng, M. Veidt, Scattering analysis of fundamental anti-symmetric Lamb wave at delaminations in composite laminate, Aust. J. Mech. Eng., 8 (2011) 197-206.

DOI: 10.1080/14484846.2011.11464611