Appearing ZGV point in the first flexural branch of Lamb waves in multilayered plates

Kuznetsov, S. V.

doi:10.1016/j.compstruct.2022.115532

Cited by 11 publications

(5 citation statements)

References 43 publications

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“…These modes confine their energy within a localized zone of the waveguide, exhibiting a sharp resonance peak in the spectrum at the ZGV frequency [15]. In a single-layer plate, there is generally a ZGV point in the S1 mode, while an odd numbered multilayered plate has a ZGV point in the A1 mode under certain conditions [16]. There are many advantages of ZGV modes, such as high sensitivity, high signal-to-noise ratio, and local detection [17], and they can be used to evaluate the thickness, damage and other material states of plates.…”

Section: Introductionmentioning

confidence: 99%

Evaluating impact damage on carbon fiber-reinforced polymer plates utilizing zero-group-velocity Lamb waves

Ren,

Meng,

Deng

2024

Smart Mater. Struct.

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This paper presents an effective method for evaluating the impact damage of composite plates using zero-group-velocity (ZGV) Lamb waves. A finite element (FE) model of the carbon fiber-reinforced polymer (CFRP) plate is established to analyze in detail the propagation characteristics of the S1-ZGV Lamb wave mode with a specified propagation direction. The study investigates the changes in the S1-ZGV mode with varying damage levels, characterized by a decrease in elastic moduli. Results indicate that as the damage level increases, the corresponding S1-ZGV frequency and amplitude decrease proportionally. The spectral amplitude at the initial S1-ZGV frequency exhibits a consistent and significant decrease with increasing damage levels, offering a reliable method for accurately assessing damage in CFRP plates. Additionally, the S1-ZGV mode of the CFRP plate is experimentally excited using the pitch-catch technique with air-coupled ultrasonic transducers to explore the variations in the S1-ZGV mode with different impact damages. Experimental findings show that the spectral amplitude of the S1-ZGV mode at the initial S1-ZGV frequency decreases monotonically and sensitively with an increasing number of impacts. These experimental results correlate with the FE analysis, validating the effectiveness of accurately evaluating impact damage in CFRP plates based on the spectral amplitude of S1-ZGV modes.

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Section: Introductionmentioning

confidence: 99%

Evaluating impact damage on carbon fiber-reinforced polymer plates utilizing zero-group-velocity Lamb waves

Ren,

Meng,

Deng

2024

Smart Mater. Struct.

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“…It was shown that in the elastic plates, the backward acoustic waves can be polarized both in the sagittal plane (Lamb waves) and in the shear-horizontal direction (SH waves) [ 22 , 23 , 24 ]. The backward acoustic waves of higher orders in isotropic plates and multilayered structures were also considered in [ 25 , 26 , 27 , 28 ]. Active studies of backward acoustic waves in piezoelectric plates and structures with large piezoelectric constants (potassium niobate, lithium niobate, SOI/AlN) have been carried out recently [ 6 , 7 , 24 , 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

Backward Acoustic Waves in Piezoelectric Plates: Possible Application as Base for Liquid Sensors

Smirnov

Зайцев

Nedospasov

et al. 2023

Sensors

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Backward acoustic waves are characterized by oppositely directed phase and group velocities. These waves can exist in isotropic and piezoelectric plates. They can be detected using a set of interdigital transducers with different spatial periods located on the same piezoelectric substrate. In this paper, the effect of a nonviscous and nonconductive liquid on the characteristics of a first-order backward antisymmetric wave in a YX plate of lithium niobate is studied theoretically and experimentally. It is shown that the presence of liquid does not lead to the transformation or disappearance of this wave. It is shown that these waves are close to the cutoff frequency and are characterized by the presence of a point with zero group velocity. The design of a liquid sensor based on these waves is proposed.

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“…At the same time, the speed of propagation of waves varies in different directions, as well as the speed of propagation of longitudinal and transverse waves. The study of elastic wave propagation in CFRP contributes to the development of methods of non-destructive testing of finished products [7,8]. However, in addition to these features, it is important to know that the impact velocity in most cases exceeds the speed of sound in the material, which leads to a qualitative difference in the results.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of wave processes under high-speed impact on an object from CFRP

Khudorozhko

Fomina²,

Dumansky³

et al. 2023

E3S Web of Conf.

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Numerical simulation of the impact of an aluminum particle on a composite medium was carried out. Carbon fiber reinforced plastic (CFRP) laminates T300/69 were used as a research object. The behavior of CFRP was analyzed at an impact velocity of 11 km/s and an aluminum particle mass of 1 g. The composite layers were located in planes oriented perpendicular to the direction of reinforcement. The Smoothed-particle hydrodynamics (SPH) method in conjunction with Ansys Autodyn was used for numerical modeling. Since large deformations and fracture of the objects were observed at such high impact velocities, which indicated a violation of the continuity of the material, that makes it incorrect to use of traditional mesh methods. The dependence of the shock wave propagation velocities in CFRP on time was obtained. The minimum thickness of the protective screen made of CFRP was estimated.

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Appearing ZGV point in the first flexural branch of Lamb waves in multilayered plates

Cited by 11 publications

References 43 publications

Evaluating impact damage on carbon fiber-reinforced polymer plates utilizing zero-group-velocity Lamb waves

Evaluating impact damage on carbon fiber-reinforced polymer plates utilizing zero-group-velocity Lamb waves

Backward Acoustic Waves in Piezoelectric Plates: Possible Application as Base for Liquid Sensors

Numerical analysis of wave processes under high-speed impact on an object from CFRP

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