Scattering characteristics of Lamb waves from debondings at structural features in composite laminates

Ng, Ching‐Tai; Veidt, Martin

doi:10.1121/1.4728192

Cited by 29 publications

(13 citation statements)

References 38 publications

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“…A variety of research has been conducted in an effort to improve the understanding of Lamb wave propagation and scattering at defects [5][6][7][8][9][10][11][12] , and to develop innovative techniques for safety inspection of layered materials, such as adhesive and diffusion bonded isotropic plates [13][14][15] and composite laminates 16,17 . Among the developed damage inspection techniques, Lamb wave diffraction tomography (LWDT) 18,19 is proving attractive as it is not only able to determine the existence and location of defects, but can also provide quantitative information from the damage inspection, such as defect sizes and shapes.…”

Section: Introductionmentioning

confidence: 99%

On Accuracy of Analytical Modeling of Lamb Wave Scattering at Delaminations in Multilayered Isotropic Plates

2015

Int. J. Str. Stab. Dyn.

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The study investigates the accuracy of analytical solutions to the fundamental anti-symmetric Lamb wave scattering at delamination in multilayered isotropic plates. The analytical models are based on the wave function expansion method and Born approximation within the framework of Mindlin plate theory. The study validates the accuracy of modeling the delamination as an inhomogeneity with reduced bending rigidity in predicting Lamb wave scattering induced by geometry change at the delaminated region. A good agreement is observed between the analytical solutions and results of experimentally verified 3D explicit finite element (FE) simulations. The findings support the inhomogeneity assumption in Lamb wave scattering problems and show the feasibility of employing it in delamination characterization.

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Section: Introductionmentioning

confidence: 99%

On Accuracy of Analytical Modeling of Lamb Wave Scattering at Delaminations in Multilayered Isotropic Plates

2015

Int. J. Str. Stab. Dyn.

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“…Ultrasonic guided waves have particular advantages for the purpose of SHM because they can travel over long distances and are sensitive to many types of damage such as crack, corrosion and delamination et al [1][2][3][4][5][6][7][8]. Many damage detection algorithms have been developed for guided wave-based SHM.…”

Section: Introductionmentioning

confidence: 99%

Elliptical ring distribution probability-based damage imaging method for complex aircraft structures

Liu¹,

Xiao²,

Zhang³

et al. 2017

J. vibroeng.

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In engineering applications, the robustness and effectiveness of damage diagnostic imaging for guided wave-based structural health monitoring could be affected by the complexity of structures. In this study, an elliptical ring distribution probability-based diagnostic imaging algorithm is proposed to mitigate this effect using the estimated wave velocity and damage index. This algorithm improves the ability of damage localization by modifying the defect distribution probability of probability-based diagnostic imaging. The elliptical ring distribution probability of the presence of defect is used for each sensing path in the algorithm. The width of the elliptical ring distribution probability is determined by the range of estimated wave velocity. The amplitude of the elliptical ring distribution probability is determined by the damage index. The damage location is determined by the cross region of different elliptical rings for different sensing paths. The capability of the algorithm is validated by identifying damages at different locations on a complex composite fuselage panel. The results show that the proposed algorithm can identify a single damage accurately and it can identify multiple damages effectively as well.

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“…Recently, Lamb wave-based damage detection has received much attention from the research community because Lamb waves can travel over long distances and are sensitive to a range of types of damage including cracks, corrosion, and delaminations [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ]. One commonly investigated Lamb wave-based damage detection paradigm uses a sparse array of permanently-affixed transducers.…”

Section: Introductionmentioning

confidence: 99%

Baseline Signal Reconstruction for Temperature Compensation in Lamb Wave-Based Damage Detection

Liu

Xiao²,

Zhang³

et al. 2016

Sensors

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Temperature variations have significant effects on propagation of Lamb wave and therefore can severely limit the damage detection for Lamb wave. In order to mitigate the temperature effect, a temperature compensation method based on baseline signal reconstruction is developed for Lamb wave-based damage detection. The method is a reconstruction of a baseline signal at the temperature of current signal. In other words, it compensates the baseline signal to the temperature of current signal. The Hilbert transform is used to compensate the phase of baseline signal. The Orthogonal matching pursuit (OMP) is used to compensate the amplitude of baseline signal. Experiments were conducted on two composite panels to validate the effectiveness of the proposed method. Results show that the proposed method could effectively work for temperature intervals of at least 18 °C with the baseline signal temperature as the center, and can be applied to the actual damage detection.

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Scattering characteristics of Lamb waves from debondings at structural features in composite laminates

Cited by 29 publications

References 38 publications

On Accuracy of Analytical Modeling of Lamb Wave Scattering at Delaminations in Multilayered Isotropic Plates

On Accuracy of Analytical Modeling of Lamb Wave Scattering at Delaminations in Multilayered Isotropic Plates

Elliptical ring distribution probability-based damage imaging method for complex aircraft structures

Baseline Signal Reconstruction for Temperature Compensation in Lamb Wave-Based Damage Detection

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