Locating and imaging contact delamination based on chaotic detection of nonlinear Lamb waves

Liu, Xiaofeng; Lin, Bo; Yang, Kangjun; Liu, Yaolu; Zhao, Youxuan; Jun, Zhang; Hu, Ning

doi:10.1016/j.ymssp.2018.02.041

Cited by 40 publications

(11 citation statements)

References 30 publications

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“…It needs to be noted that the present investigation is performed under the precondition that the exact location of the microcrack examined is known in advance. Regarding the method for exactly locating a microcrack, it can be found in [ 40 , 41 ]. Figure 2 , meanwhile, shows a 2D model for investigating nonlinear interaction of an incident UTW and a microcrack with orientation angle

, where the solid is assumed to be aluminum with the material parameters listed in Table 1 .…”

Section: Theoretical Fundamentalsmentioning

confidence: 99%

Characterization of Microcrack Orientation Using the Directivity of Secondary Sound Source Induced by an Incident Ultrasonic Transverse Wave

Wang

Zhao

et al. 2020

Materials

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In this paper, characterization of the orientation of a microcrack is quantitatively investigated using the directivity of second harmonic radiated by the secondary sound source (SSS) induced by the nonlinear interaction between an incident ultrasonic transverse wave (UTW) and a microcrack. To this end, a two-dimensional finite element (FE) model is established based on the bilinear stress–strain constitutive relation. Under the modulation of contact acoustic nonlinearity (CAN) to the incident UTW impinging on the microcrack examined, the microcrack itself is treated as a SSS radiating the second harmonic. Thus, the directivity of the second harmonic radiated by the SSS is inherently related to the microcrack itself, including its orientation. Furthermore, the effects of the stiffness difference between the compressive and tensile phases in the bilinear stress–strain model, and the UTW driving frequency, as well as the radius of the sensing circle on the SSS directivity are discussed. The FE results show that the directivity pattern of the second harmonic radiated by the SSS is closely associated with the microcrack orientation, through which the microcrack orientation can be characterized without requiring a baseline signal. It is also found that the SSS directivity varies sensitively with the driving frequency of the incident UTW, while it is insensitive to the stiffness difference between the compressive and tensile phases in the bilinear stress–strain model and the radius of the sensing circle. The results obtained here demonstrate that the orientation of a microcrack can be characterized using the directivity of the SSS induced by the interaction between the incident UTW and the microcrack.

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, where the solid is assumed to be aluminum with the material parameters listed in Table 1 .…”

Section: Theoretical Fundamentalsmentioning

confidence: 99%

Characterization of Microcrack Orientation Using the Directivity of Secondary Sound Source Induced by an Incident Ultrasonic Transverse Wave

Wang

Zhao

et al. 2020

Materials

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“…The generation of higher-order harmonics due to contact nonlinearity has been investigated experimentally for bulk waves [32], Rayleigh waves [33]- [35] as well as for Lamb waves. A number of recent studies have also focused on different types of damage, such as delamination [36]- [38], fatigue cracks [39]- [41], debonding [42] [43], and loosening bolted joints [44] [45].…”

Section: Nonlinear Guided Wavementioning

confidence: 99%

Second-order harmonic generation of Lamb wave in prestressed plates

Yang

Kotousov

2019

Journal of Sound and Vibration

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“…Higher harmonic generation characteristics of Lamb waves at closed delaminations in composite laminates were also investigated by other investigators. 20,21 In order to exploit the applicability of Lamb-wavebased nonlinear ultrasonic techniques for closed cracks, a number of theoretical and numerical studies have also been carried out. Shkerdin and Glorieux 22,23 analyzed the nonlinear interaction of a low-frequency pumping Lamb wave and a high-frequency probing Lamb wave at a contacting delamination in bilayer structures.…”

Section: Introductionmentioning

confidence: 99%

Second-harmonic generation of the lowest-order antisymmetric Lamb wave at a closed parallel crack

Biwa

Mori

2020

The Journal of the Acoustical Society of America

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The second-harmonic generation of the fundamental antisymmetric Lamb wave at a closed parallel crack in an elastic plate is studied by numerical analysis. The closed crack is modeled as a spring-type interface with quadratic nonlinearity. Based on a perturbation method, the problem of nonlinear Lamb wave scattering is decomposed into two linearized problems, i.e., for the linear reflection/transmission of the incident Lamb wave at the crack and for the generation/radiation of the second-harmonic Lamb waves due to the contact nonlinearity. The reduced problems are solved by the finite element method in the frequency domain. Numerical results demonstrate significant effects of the crack resonance on the linear and nonlinear Lamb wave scattering responses, which appear as sharp peaks/dips in the reflection/transmission spectra and enhanced second-harmonic amplitudes at some frequencies. Two simple frequency selection rules are established which explain the enhanced generation of the second-harmonic Lamb waves. The time-domain analysis is also carried out to supplement the frequency-domain analysis, which confirms that the incident Lamb wave interacts with the crack at some specific frequencies in its bandwidth in a selective manner and enhances the generation of the second-harmonic components. V

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Locating and imaging contact delamination based on chaotic detection of nonlinear Lamb waves

Cited by 40 publications

References 30 publications

Characterization of Microcrack Orientation Using the Directivity of Secondary Sound Source Induced by an Incident Ultrasonic Transverse Wave

Characterization of Microcrack Orientation Using the Directivity of Secondary Sound Source Induced by an Incident Ultrasonic Transverse Wave

Second-order harmonic generation of Lamb wave in prestressed plates

Second-harmonic generation of the lowest-order antisymmetric Lamb wave at a closed parallel crack

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