Lamb Wave Scattering Analysis for Interface Damage Detection between a Surface-Mounted Block and Elastic Plate

Golub, Mikhail V.; Shpak, Alisa N.; Mueller, Inka; Fomenko, Sergey I.; Fritzen, Claus‐Peter

doi:10.3390/s21030860

Cited by 14 publications

(6 citation statements)

References 37 publications

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“…Guided waves were reported to have been successfully used for damage identification and localization in composite structural members, 10,11 however damage quantification is not much reported which requires suitable modelling, experiments, and data processing. In some of the works, damages are simulated in some other form as done by Mikhail et al 12 A metallic block is glued on the surface of a metallic plate and the debond at the interface is the damage. Ao mode is used for the detection and the influence of the block height on the guided wave signal is investigated.…”

Section: Introductionmentioning

confidence: 99%

“…Several numerical techniques 21 including the Finite Element Method (FEM), 22,23 the Boundary Element Method (BEM) 24 and the Spectral Element Method (SEM) 25,26 have been used to analyze the propagation of elastic waves. Mikhail et al 12 developed a 2D mathematical model with plain strain assumption to capture the wave scattering due to presence of damage and validated with experimental results. Commercial FE packages like ABAQUS have the capability to solve the multi-physics problems arising from the use of PZT transducers in a structure.…”

Section: Introductionmentioning

confidence: 99%

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Detection and Quantification of Asymmetrically Located Structural Damages by Mode Converted Guided Waves Using Piezo Electric Elements

Patnaik¹,

Renji²,

Gopal³

2023

The International Journal of Acoustics and Vibration

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Though damage identification using guided waves generated using ultrasonics is well proven, its usage for structural health monitoring poses difficulties. Piezo electric actuation and sensing overcomes this difficulty to some extent. In this work, usage of such guided waves for damage identification is investigated. Piezo electric wafer transducers are used for generating and sensing the guided waves. Presence of multiple modes and comparatively higher speeds of the guided waves throw up difficulties in damage identification. It is shown here that this problem can be addressed by considering different sensor location with respect to the damage with suitable interpretation of the results. Usage of fundamental antisymmetric (Ao) mode is found to be more suitable in localizing the damage compared to the fundamental symmetric (So) mode. Asymmetrically located damage causes mode conversion. It is demonstrated in this work that the mode converted guided wave (So) could be advantageously used for identification, localization, and quantification of the damage. Damage identification and localization schemes are evolved based on the location of the sensors with respect to the damage. It is shown that the reduction in the magnitude of the mode converted wave can be utilized for assessing the depth of the damage. 3D finite element based numerical models incorporating a PZT sensor are developed and validated with experimental results in terms of the characteristics of the waves, mode conversion due to damage and influence of the defect size on the received signals which are necessary for quantification of the damage.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Detection and Quantification of Asymmetrically Located Structural Damages by Mode Converted Guided Waves Using Piezo Electric Elements

Patnaik¹,

Renji²,

Gopal³

2023

The International Journal of Acoustics and Vibration

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“…In 2021, Golub et al [ 33 ] employed a 2-D mathematical model to simulate Lamb wave excitation and sensing via rectangular piezoelectric-wafer active transducers mounted on the surface of an elastic plate with rectangular surface-bonded obstacles (stiffeners) with interface defects.…”

Section: Introductionmentioning

confidence: 99%

Plate Waves Scattering Analysis and Active Damage Detection

2021

Sensors

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This study investigates and evaluates the technology of using plate waves to detect the locations and sizes of circular holes and cracks in plates. Piezoelectric ceramic discs surface-mounted on both sides of an aluminum alloy plate were used as narrow-frequency plate wave actuators and sensors, and the antisymmetric plate wave signal was analyzed by wavelet transform in the time-frequency domain. The damage location and frequency spectrum characteristics were identified by the wave through time-of-flight difference and signal analysis of the damage scattered wave group. The plate wave signal of the damaged plate included the scattered wave signal and the plate wave signal transmitted directly between the piezoelectric discs. Under ideal conditions, the plate wave signal indicating damage can be obtained by subtracting the plate wave signal in a plate without damage from the plate wave signal scattered from actuators to sensors. This study established an optimization program based on the simplex algorithm to inversely calculate the location of the plate damage. The developed damage location objective function has a unique global minimum value that can ensure the accuracy of the damage location calculation, and good results were obtained in experiments. The spectral characteristics of the scattered plate wave were related to the type, size, wave propagation path, and incident angle of the damage. Numerical analyses of scattered spectra for various damages are needed as references to compare with experimental results in the future.

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“…Breathing debond analysis in composite structures with stiffener using GW measurements was analysed by Sikdar et al [12]. Golub et al [13] analysed GW scattering at the interface regions of structures. Bekas et al studied debond and impact analysis in mono stringer using PZT [14].…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic guided wave-based debond identification in a GFRP plate with L-stiffener

Balasubramaniam

Sikdar

Wandowski

et al. 2021

Smart Mater. Struct.

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This paper presents a robust assessment of debond in a glass fibre-reinforced polymer composite structure with L-stiffener attachment. Towards this, the ultrasonic guided wave (GW) propagation based laboratory experiments have been carried out on a stiffened composite panel with piezoelectric transducers for the excitation of GWs and a scanning laser Doppler vibrometer for sensing the GW propagation. To study the changes caused by the stiffener and debond a signal processing based multi-point analysis has been carried out. The proposed methodology consists of two steps. Step 1 using the full wavefield root mean square energy map-based approach to check the presence of debond. Step 2 using point-wise measurements to study debond localization and size estimation using a baseline free signal coefficient difference algorithm (SCDA). The proposed processing approaches are applied for an in-depth analysis of the experimental signals that provide information about the interaction of GWs with stiffener and debond. The mentioned approaches take advantage of the asymmetry caused by the damage. For the applied SCDA methodology there is no need for full-wavefield measurements, healthy case measurements, as only a few measurement points can be enough for the assessment of stiffener debond in such structures.

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Lamb Wave Scattering Analysis for Interface Damage Detection between a Surface-Mounted Block and Elastic Plate

Cited by 14 publications

References 37 publications

Detection and Quantification of Asymmetrically Located Structural Damages by Mode Converted Guided Waves Using Piezo Electric Elements

Detection and Quantification of Asymmetrically Located Structural Damages by Mode Converted Guided Waves Using Piezo Electric Elements

Plate Waves Scattering Analysis and Active Damage Detection

Ultrasonic guided wave-based debond identification in a GFRP plate with L-stiffener

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