Efficient excitation of transverse vibrational modes using improved configurations of PFCs connected to an isotropic plate

Chuang, Kuo-Chih; Lin, Shiang‐Tai; Ma, Chien‐Ching

doi:10.1016/j.compstruct.2021.113718

Cited by 2 publications

(2 citation statements)

References 28 publications

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“…According to the literature data [6,10,12], the displacement of the surface of the LC along its normal over the SD when it is detected during AW irradiation is approximately 10...50 nm. Gyroscopes, speckle interferometers, and laser vibrometers are usually used for the testing and analysis of such magnitude of displacements [4,5,[13][14][15]. Speckle interferometers have high sensitivity and allow monitoring of displacements in only one (selected) direction [13], like laser vibrometers, and also the ability to simultaneously test these displacements over a significant area of the surface, like shearography.…”

Section: Acoustic Resonance In a Hidden Defectmentioning

confidence: 99%

“…The percentage of using composite structural elements is increasing rapidly in the modern aircraft building [1,2]. Although the problem of detection and identification of SD in the structural elements of modern products made of LCM has been dealt with for decades, it remains extremely relevant [3][4][5][6]. The most dangerous difficult to detect SDs include unbounded areas between layers during construction, delamination, internal damages such as cracks and areas of crumpling during its operation.…”

Section: Introductionmentioning

confidence: 99%

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Detection and Identification of Hidden Defects in Layered Polymer Composites Using Combination of Acoustic Resonance and Interferometric Monitoring of Surface Displacements

Nazarchuk

Voronyak

Kuts

et al. 2023

Preprint

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Method of detection and identification of hidden defects in the structural elements made of layered composite materials is presented in this study. Such defects occur during production of composite materials, composite structures and during their operation. A proposed method of non-destructive testing combines the acoustic load of the test object and the interferometric testing of its surface displacements, which arise as a result of resonance of the acoustic wave in the defect. The defect is considered as an acoustic resonator filled with a medium (under normal conditions – by air) in which only a longitudinal acoustic wave propagates. The novelty of the method is that it allows not only to detect and locate a hidden defect, but also to determine its dimensions. And its advantage is that it does not require knowledge about the mechanical properties of the material, as a result, it is not necessary to determine the speed of sound propagation in the composite; it allows to test materials with arbitrary parameters of its surface roughness (from optically rough to mirror-smooth ISO 4287:2012); uses acoustic waves with frequencies 3...5 times lower than similar methods. Authors presented in this work experimental results that confirm the effectiveness of the proposed method.

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Section: Acoustic Resonance In a Hidden Defectmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Detection and Identification of Hidden Defects in Layered Polymer Composites Using Combination of Acoustic Resonance and Interferometric Monitoring of Surface Displacements

Nazarchuk

Voronyak

Kuts

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

Modeling Full-Field Transient Flexural Waves on Damaged Plates with Arbitrary Excitations Using Temporal Vibration Characteristics

Wang

Chuang

Liu

et al. 2022

Sensors

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We propose an efficient semi-analytical method capable of modeling the propagation of flexural waves on cracked plate structures with any forms of excitations, based on the same group of vibration characteristics and validated by a non-contact scanning Laser Doppler Vibrometer (LDV) system. The proposed modeling method is based on the superposition of the vibrational normal modes of the detected structure, which can be applied to analyze long-time and full-field transient wave propagations. By connecting the vibration-based transient model to a power flow analysis technique, we further analyze the transient waves on a cracked plate subjected to different excitation sources and show the influence of the damage event on the path of the propagating waves. The experimental results indicate that the proposed semi-analytical method can model the flexural waves, and through that, the crack information can be revealed.

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Efficient excitation of transverse vibrational modes using improved configurations of PFCs connected to an isotropic plate

Cited by 2 publications

References 28 publications

Detection and Identification of Hidden Defects in Layered Polymer Composites Using Combination of Acoustic Resonance and Interferometric Monitoring of Surface Displacements

Detection and Identification of Hidden Defects in Layered Polymer Composites Using Combination of Acoustic Resonance and Interferometric Monitoring of Surface Displacements

Modeling Full-Field Transient Flexural Waves on Damaged Plates with Arbitrary Excitations Using Temporal Vibration Characteristics

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