Low-velocity impact-induced delamination detection by use of the S0 guided wave mode in cross-ply composite plates: A numerical study

Hayat, Khazar; Ha, Sung Kyu

doi:10.1007/s12206-013-1109-4

Cited by 17 publications

(12 citation statements)

References 24 publications

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“…Scattered amplitudes and directivity distributions are influenced by the delamination size to wavelength ratio and the through-thickness location, as the forward scattered amplitude is dependent on the phase difference between the waves propagating in each sub-laminate [18]. For a circular delamination, the amplitudes show a large forward scattered wave relative to the reflected pulse, as highlighted by numerical simulations [19]. Numerical studies have demonstrated that the maximum amplitude in the scattered field increases with delamination size [20].…”

Section: Introductionmentioning

confidence: 93%

Guided wave propagation and scattering at composite delaminations

Hervin

Fromme

2021

Health Monitoring of Structural and Biological Systems XV

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Composite structures, consisting of highly anisotropic layers of polymer matrix reinforced with high strength carbon fibers, are widely used for aerospace applications due to their low weight and high strength. However, impact during aircraft operation can lead to barely visible and difficult to detect damage. Depending on impact severity, delaminations can occur that reduce the structural integrity and load carrying capacity. Efficient structural health monitoring (SHM) of composite panels can be achieved using guided ultrasonic waves propagating along the structure. Guided ultrasonic wave propagation and scattering at circular delaminations was modelled using full three-dimensional (3D) Finite Element (FE) simulations in ABAQUS. Individual ply layers were modelled using unidirectional composite material properties to accurately capture the anisotropy effects. The guided ultrasonic wave propagation and scattered field at an artificial delamination was measured using a noncontact laser interferometer and quantified. Good agreement between experiments and Finite Element predictions was found and the energy trapping on top of a shallow delamination was verified. The influence of delamination shape and depth was investigated from a FE parameter study. The sensitivity of guided waves for the detection of delaminations due to barely visible impact damage (BVID) in composite panels has been verified.

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Section: Introductionmentioning

confidence: 93%

Guided wave propagation and scattering at composite delaminations

Hervin

Fromme

2021

Health Monitoring of Structural and Biological Systems XV

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“…Scatter amplitudes and directivity distributions depend on the delamination size to wavelength ratio and the through-thickness location of the delamination damage. For a circular delamination, the amplitudes show a large forward scattered wave relative to the reflected pulse, as highlighted by numerical simulations [15]. The disbond width has a strong influence on the scattering directivity and the angular pattern of the scattered wave field is to a large degree independent of the delamination length, while the delamination depth has a significant influence on the magnitude of the scattered waves [16].…”

Section: Introductionmentioning

confidence: 77%

Guided wave scattering analysis around a circular delamination in a quasi-isotropic fiber-composite laminate

Maio

Hervin

Fromme

2020

Health Monitoring of Structural and Biological Systems IX

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Carbon fiber reinforced composites are widely used in the aerospace industry, but barely visible impact damage can lead to delamination and compromise the structural integrity. The scattering of the fundamental anti-symmetric guided wave mode (A 0 Lamb mode) at an artificial circular delamination in a quasi-isotropic laminate was investigated experimentally. A 5 cycle Hanning windowed wave pulse was used as the excitation signal for the experiments. Fast Fourier Transform was employed to identify the guided wave amplitude of the scattered field along various directions. The experimental wavefield was captured using a laser Doppler vibrometer. Experimental results are presented for the scattering pattern and scattering amplitude as a function of distance from the damage. The results of this study can help to improve delamination detection techniques using guided waves and to gain physical insights into the scattering of guided waves at a delamination.

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“…Composite materials have been widely used in a variety of fields, because of their specific properties, such as its light weight, high stiffness, high strength and corrosion resistance [1,2]. However, due to low velocity impact, manufacturing process and aging, delamination often occurs in the subsurface of material without any obvious indication on the surface.…”

Section: Introductionmentioning

confidence: 99%

An Efficient Time Reversal Method for Lamb Wave-Based Baseline-Free Damage Detection in Composite Laminates

Huang

Chen

et al. 2018

Applied Sciences

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Time reversal (TR) concept is widely used for Lamb wave-based damage detection. However, the time reversal process (TRP) faces the challenge that it requires two actuating-sensing steps and requires the extraction of re-emitted and reconstructed waveforms. In this study, the effects of the two extracted components on the performance of TRP are studied experimentally. The results show that the two time intervals, in which the waveforms are extracted, have great influence on the accuracy of damage detection of the time reversal method (TRM). What is more, it requires a large number of experiments to determine these two time intervals. Therefore, this paper proposed an efficient time reversal method (ETRM). Firstly, a broadband excitation is applied to obtain response at a wide range of frequencies, and ridge reconstruction based on inverse short-time Fourier transform is applied to extract desired mode components from the broadband response. Subsequently, deconvolution is used to extract narrow-band reconstructed signal. In this method, the reconstructed signal can be easily obtained without determining the two time intervals. Besides, the reconstructed signals related to a series of different excitations could be obtained through only one actuating-sensing step. Finally, the effectiveness of the ETRM for damage detection in composite laminates is verified through experiments.

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Low-velocity impact-induced delamination detection by use of the S0 guided wave mode in cross-ply composite plates: A numerical study

Cited by 17 publications

References 24 publications

Guided wave propagation and scattering at composite delaminations

Guided wave propagation and scattering at composite delaminations

Guided wave scattering analysis around a circular delamination in a quasi-isotropic fiber-composite laminate

An Efficient Time Reversal Method for Lamb Wave-Based Baseline-Free Damage Detection in Composite Laminates

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