Damage imaging in composite plate by using double-turn coil omnidirectional shear-horizontal wave magnetostrictive patch transducer array

Liu, Zenghua; Zhong, Xuwen; Xie, Muwen; Liu, Xiucheng; He, Cunfu; Wu, Bin

doi:10.1080/09243046.2017.1313578

Cited by 23 publications

(4 citation statements)

References 20 publications

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“…By contrast, guided wave inspection employs signals with wavelengths comparable to the thickness of the structural walls, enabling the inspection of large-area components [ 6 ]. Guided wave non-destructive testing and structural health monitoring employ guided wave array imaging technology, which facilitates rapid localization and identification of cracks, through-holes, and delamination damage in plate-like structures [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

Detection of Multi-Layered Bond Delamination Defects Based on Full Waveform Inversion

Wen,

Jiang,

Chen

2024

Sensors

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This study aimed to address the challenges encountered in traditional bulk wave delamination detection methods characterized by low detection efficiency. Additionally, the limitations of guided wave delamination detection methods were addressed, particularly those utilizing reflected waves, which are susceptible to edge reflections, thus complicating effective defect extraction. Leveraging the full waveform inversion algorithm, an innovative approach was established for detecting delamination defects in multi-layered structures using ultrasonic guided wave arrays. First, finite element modeling was employed to simulate guided wave data acquisition by a circular array within an aluminum–epoxy bilayer structure with embedded delamination defects. Subsequently, the full waveform inversion algorithm was applied to reconstruct both regular and irregular delamination defects. Analysis results indicated the efficacy of the proposed approach in accurately identifying delamination defects of varying shapes. Furthermore, an experimental platform for guided wave delamination defect detection was established, and experiments were conducted on a steel–cement bilayer structure containing an irregular delamination defect. The experimental results validated the exceptional imaging precision of our proposed technique for identifying delamination defects in multi-layered boards. In summary, the proposed method can accurately determine both the positions and sizes of defects with higher detection efficiency than traditional pulse-echo delamination detection methods.

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Section: Introductionmentioning

confidence: 99%

Detection of Multi-Layered Bond Delamination Defects Based on Full Waveform Inversion

Wen,

Jiang,

Chen

2024

Sensors

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“…Compared with Lamb waves, SH waves have less mode conversion after damage or boundary scattering [17], which effectively reduces the complexity of signal processing and damage positioning and has strong engineering application value. NDT based on SH waves generally employs a magnetostrictive patch transducer (MPT) or an electromagnetic acoustic transducer (EMAT) as the exciter [18][19][20]. However, due to the complex structures of EMATs and MPTs, which require high-power driving, they are not suitable for SHM applications.…”

Section: Introductionmentioning

confidence: 99%

Damage detection in thick plate structures based on ultrasonic SH wave

Cui¹,

Li²,

Zhou³

et al. 2022

Smart Mater. Struct.

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Thick plate structures are widely used in large deep-sea scientific detection equipment such as deep-sea human occupied vehicles, but they are prone to local damage caused by fatigue due to the complex working environment load. To prevent structural failure due to damage accumulation, it is necessary to carry out structural health monitoring of thick plate structures. In this paper, two-half-ring thickness-shear d15 mode omnidirectional shear horizontal (SH) wave piezoelectric transducers are used to form an exciter/receiver network and to select the SH2 mode wave packet as the damage location wave packet. Then, the reconstruction algorithm for the probabilistic inspection of damage (RAPID), an algorithm based on the time of guided wave flight, is applied to image damage in a 30 mm thick aluminium plate structure to determine the central location and depth of the damage. Experimental results show that the structural damage detection technique based on SH waves can effectively identify and locate thick plate structural damage and evaluate the damage depth.

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“…Omni-directional SH wave transducers were firstly realized by Kim et al using MPT [27] and later using EMAT [28]. Recently, Liu et al employed the MPT based omni-directional SH0 wave transducer array to detect defects in quasi-isotropic composites [29]. However, due to the complicated structures and high power driving problem, both the omni-directional MPT and EMAT are not suitable for SHM applications.…”

Section: Introductionmentioning

confidence: 99%

A practical omni-directional SH wave transducer for structural health monitoring based on two thickness-poled piezoelectric half-rings

Chen

2019

Ultrasonics

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Structural health monitoring (SHM) has become more and more important in modern industries as it can monitor the safety of structures during the full service life and prevent possible losses of life and economics. Shear horizontal wave in plate-like structures is very useful for long distance inspection since its fundamental mode (SH) is totally non-dispersive. However, all the currently available SH wave transducers are not suitable for practical SHM because of their complicated structures. In this work, we firstly investigated via finite element (FEM) simulations the performances of thickness-poled d PZT ring based omni-directional SH wave piezoelectric transducers (OSH-PT) consisting of different number of elements. Results show that the two-half-ring based OSH-PT can have perfect omni-directivity and acceptable performances in excitation/reception of SH waves. Then, experimental testing on a 21 mm outer-diameter (OD), 9 mm inner-diameter (ID) two-half-ring OSH-PT shows that it exhibits acceptable but not desirable performances in both excitation and reception of SH wave. Finally, size optimization was conducted on the two-half-ring based OSH-PT using FEM simulations and results showed that its performances can be fairly enhanced by reducing the outer diameter of the half-ring. Testing results on a 12 mm-OD, 6 mm-ID OSH-PT show that the SH-to-Lamb waves ratio in the case of self-excitation and self-reception can be over 20 dB from 115 kHz to 250 kHz, which is good enough for practical applications. The proposed two-half-ring OSH-PT is expected to be widely used in SH wave based SHM due to its simple structure, easy fabrication/assembling, low cost and good performances.

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Damage imaging in composite plate by using double-turn coil omnidirectional shear-horizontal wave magnetostrictive patch transducer array

Cited by 23 publications

References 20 publications

Detection of Multi-Layered Bond Delamination Defects Based on Full Waveform Inversion

Detection of Multi-Layered Bond Delamination Defects Based on Full Waveform Inversion

Damage detection in thick plate structures based on ultrasonic SH wave

A practical omni-directional SH wave transducer for structural health monitoring based on two thickness-poled piezoelectric half-rings

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