Mechanisms of multi-bandgap inertial amplification applied in metamaterial sandwich plates

International Journal of Mechanical Sciences, Journal Year: 2024, Volume and Issue: 277, P. 109424 - 109424

Published: May 27, 2024

Language: Английский

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A Review of Recent Advances in Unidirectional Ultrasonic Guided Wave Techniques for Nondestructive Testing and Evaluation

Sensors, Journal Year: 2025, Volume and Issue: 25(4), P. 1050 - 1050

Published: Feb. 10, 2025

Unidirectional ultrasonic guided waves (UGWs) play a crucial role in the nondestructive testing and evaluation (NDT&E) domains, offering unique advantages detecting material defects, evaluating structural integrity, improving accuracy of thickness measurements. This review paper thoroughly studies state art unidirectional UGWs before presenting comprehensive foundational mathematical principles UGWs, focusing on recent advancements their methodologies applications. introduces modes looking at mode excitability selectivity, signal excitation, mechanisms used to generate receive unidirectionally. outlines applications reflect effectiveness, for instance, measuring identifying defects such as cracks corrosion pipelines, etc. The also challenges associated with UGW generation utilisation, multi-mode side lobes. It includes literature mitigate these challenges. Finally, this highlights promising future perspectives develops directions technique. aims create useful resource researchers practitioners comprehend waves’ capabilities, challenges, prospects NDT&E

Language: Английский

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Multi-band topological valley modes of flexural waves in micro-perforated phononic plates

International Journal of Mechanical Sciences, Journal Year: 2023, Volume and Issue: 266, P. 108916 - 108916

Published: Dec. 14, 2023

Language: Английский

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Wave manipulation of a coupling pendulum metamaterial by parametric excitation

Physica Scripta, Journal Year: 2025, Volume and Issue: 100(3), P. 035221 - 035221

Published: Feb. 18, 2025

Abstract The use of mechanical metamaterials for the purpose controlling wave propagation is made possible by their flexibility and adjustability. In this paper, a one-dimensional metamaterial composed compound pendulums inverted with high-frequency parametric excitation proposed. pendulum system can be equivalent to nonlocal effective mass stiffness obtained. provides an additional stiffness. This provide antigravity effect pendulum. It makes into stable system. stability, bandgap structure velocity manipulated adjusting frequency excitation. And zero-frequency Moreover, capable splitting wavepacket two distinct wavepackets within dual wavevector region. theoretical results are corroborated finite element numerical method. Due presence excitation, proposed model more tuneable than conventional metamaterials. study has potential establish novel approach control ultra-low vibration. phenomenon capacity foundation design separator. anticipated that findings will also furnish insights other devices propagation.

Language: Английский

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Bio-inspired elastic metamaterial by B-form DNA: Programmable dual helix structures for low-frequency longitudinal wave prohibition

Composite Structures, Journal Year: 2025, Volume and Issue: unknown, P. 118986 - 118986

Published: Feb. 1, 2025

Language: Английский

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Omnidirectional retroreflectors based on flexural wave metagratings

Journal of Applied Physics, Journal Year: 2025, Volume and Issue: 137(15)

Published: April 16, 2025

Omnidirectional retroreflectors that reflect the obliquely incident wave along its direction in omnidirectional angle range are highly desired for control and manipulation of flexural waves. With an enhanced signal-to-noise ratio (SNR) suppressed signal losses, high-efficiency can be widely used guiding, detection, imaging, cloaking. In this article, we propose a different but competent design paradigm to realize retroreflection on basis metagratings. By applying multi-objective optimization algorithm manipulate as many nine diffraction channels, successfully demonstrate retroreflector over broad continuous angles spanning from −78.2° 78.2°. Two interesting applications suggested metagrating-based retroreflectors. first one, metagrating structure is utilized suppress diffuse reflection induced by irregular or curved boundaries thin plate, restoring spectral effect enhancing SNR. second unit cells decorate flat straight waveguide stop propagation waveguide, resulting localization signal. Considering relatively simple configuration, proposed approach expected find various fields such nondestructive evaluation structural health monitoring.

Language: Английский

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An elastic meta-enhancer for improved damage detection via nonlinear ultrasonic feature amplification

Mechanical Systems and Signal Processing, Journal Year: 2025, Volume and Issue: 231, P. 112685 - 112685

Published: April 8, 2025

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Single-channel acoustic vortex tweezer with attachable fan-shaped holographic lens

International Journal of Mechanical Sciences, Journal Year: 2023, Volume and Issue: 260, P. 108635 - 108635

Published: July 19, 2023

The utilization of acoustic vortices presents a promising technique for contactless particle manipulation. However, existing methods generating typically rely on complex active driving systems and array ultrasound transducers. Therefore, more simplified robust approaches to inducing should be considered. With inspiring the fact that can generated by differences in height adjacent sectors conventional four-panel transducer, we aim develop single-channel vortex tweezer with system incorporating attachable fan-shaped polydimethylsiloxane (PDMS) holographic lens. This passive lens structure different heights generate phase-modulated ultrasonic waves. interaction waves passing through is expected result vortex-like beam. available materials are not limited PDMS. type appropriately fabricated an understanding sound speed within desired material predetermined thickness, π/2 phase difference lobes. As result, excited propagated were under mutual without any electrical setup, forming null pressure region enveloped four distinct We systemically investigated tweezing potential using Several types bioparticles utilized these investigations: microbubbles, polystyrene (PS) beads, cancer cells. Our findings demonstrate transducer sufficiently capable spatial manipulation bioparticles. Remarkably, microbubbles traveling at flow velocity 32 cm/s blood vessel-mimicking phantom feasibly trapped proposed transducer. Furthermore, control PS cells higher impedance was also feasible static conditions. offers economically practically viable solution various biomedical applications, such as drug delivery cell-based bioengineering.

Language: Английский

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Tunable flexural waves by piezoelectric metasurface with shunt circuits

International Journal of Mechanical Sciences, Journal Year: 2024, Volume and Issue: 284, P. 109769 - 109769

Published: Oct. 11, 2024

Language: Английский

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Flexible wavefront modulation of Rayleigh surface waves by mechanically reconfigurable elastic metasurface

Extreme Mechanics Letters, Journal Year: 2023, Volume and Issue: 64, P. 102088 - 102088

Published: Oct. 6, 2023

Language: Английский

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