Article
Acoustics
Tai -Ho Yu
Summary: This study investigated the characteristics and propagation of thickness mode and thickness shear mode Lamb waves excited by a surface interdigital transducer and incident on piezoelectric ceramic plates. Numerical calculations were performed to analyze the time-domain response, frequency-domain response, and wave propagation of these Lamb waves. The study also examined the effects of different electrode numbers and widths on the near-field and far-field responses of interdigital transducers.
Article
Materials Science, Characterization & Testing
Xiangyan Ding, Caibin Xu, Mingxi Deng, Youxuan Zhao, Xiaoyang Bi, Ning Hu
Summary: This study demonstrates that early stage damage caused by surface corrosion in thin plates can be evaluated using nonlinear Lamb wave methods. By measuring resonant waves and harmonics, the extent of damage caused by corrosion can be assessed, allowing for characterization of the position and length of the corroded region on the surface.
NDT & E INTERNATIONAL
(2021)
Article
Materials Science, Characterization & Testing
Wujun Zhu, Zisheng Xu, Yanxun Xiang, Changjun Liu, Mingxi Deng, Xunlin Qiu, Di Sun, Fuzhen Xuan
Summary: The study shows that SCLWs are more sensitive to crack length, width, and orientation angle, making them useful for detecting the evolution of partially closed cracks in metal plates. Additionally, the acoustic nonlinearity parameter increases monotonically with increasing fatigue crack length.
NDT & E INTERNATIONAL
(2021)
Article
Engineering, Civil
Yan Wang, Junliang Wang, Zhengyi Kong, Wei Zhu, Haoyu Xu, Chao Jiang, Dongsheng Cheng, Seung-Eock Kim
Summary: Corrosion significantly impacts the safety of steel structures. This study proposes a novel method using Lamb waves to identify the extent of corrosion on steel plates. Through numerical analysis and experiments, two corrosion identification factors are developed to accurately predict the corrosion extent, providing valuable insights for the safety assessment of steel structures.
JOURNAL OF CIVIL STRUCTURAL HEALTH MONITORING
(2023)
Article
Engineering, Electrical & Electronic
Luca Colombo, Abhay Kochhar, Gabriel Vidal-Alvarez, Pietro Simeoni, Umut Soysal, Gianluca Piazza
Summary: This paper discusses the design, fabrication, and characterization of S-0 mode X-cut Lithium Niobate Laterally Vibrating Resonators (LVRs) operating between 100 MHz and 1 GHz. Analytical and numerical models are used to investigate the impact of topology and geometrical features on the performance of these devices. Results show high quality factors and electromechanical coupling under vacuum conditions, with a focus on maximizing the Figure of Merit (FOM) in the 100 to 550 MHz range.
JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
(2022)
Article
Engineering, Civil
Zoe Yaw, C. W. Lim, Zheng Zhong, Weijian Zhou
Summary: The authors study the wave motion in an elastic half-space and propose a new method of generating S-waves by applying vertical excitations. By establishing an analytical model and using machine learning, they discover that multiple vertical excitations with opposite magnitudes can induce beam splitting of transmitted S-waves. They also introduce a binary coding metasurface to achieve beam splitting of transmitted S-waves through an input of P-waves.
ENGINEERING STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Shuyi Ma, Guixian Zhang, Hongfeng Hou, Lidong Wang
Summary: This article investigates the mutual interactions of Lamb waves in nonlinear elastic plates. The existence of symmetric or antisymmetric modes, induced by the mutual interactions of Lamb waves, is theoretically formulated and confirmed through experiments. A method for evaluating the intensity of phase velocity matching to select primary modes is proposed. The results demonstrate the generation of modulated waves in an aluminum plate and fatigue crack through the mutual interactions of Lamb waves.
Article
Engineering, Mechanical
Weiming Xuan, Maodan Yuan, Xuanrong Ji, Wenjin Xu, Yan Chen, Lvming Zeng
Summary: In this paper, the zero-group-velocity (ZGV) Lamb mode was proposed to measure the local stress field in thin aluminum plates. The dispersion characteristics of the Lamb wave under initial stress were analyzed, showing that the S1-ZGV mode is highly sensitive to stress. Numerical experiments validated the feasibility and accuracy of the S1-ZGV method for local stress measurement.
CHINESE JOURNAL OF MECHANICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Sergey V. Kuznetsov
Summary: The study presents a method for calculating the low frequency velocity limits of Lamb waves in various types of plates, using Cauchy sextic formalism and the stratification convergence theorem. The constructed solutions involve vanishing auxiliary determinants related to derivatives of the closed form solutions of dispersion equations.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2021)
Article
Engineering, Electrical & Electronic
Xu Xu, Xing Ai, Tinghao Liu, Jun Lan, Yifeng Li
Summary: This study investigated the simultaneous localization and evaluation of microcracks in plates using the nonlinear Lamb wave-mixing technique and Lamb transformer network. The finite-element simulation was used to analyze the nonlinear effects induced by the interaction of Lamb waves and microcracks with different characteristics. The stacked spectrum map was introduced to analyze the influence of microcrack location, direction, and length on the received signal's spectrum. The proposed Lamb transformer network, utilizing the stacked spectrum map, achieved a high accuracy rate of 99% in predicting microcracks, demonstrating its effectiveness in identifying the complex connections between the sensor array spectrum and microcracks.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Physical
Xin Yang, Jiang Xu, Shuchang Zhang, Jun Tu
Summary: In this study, A(0) mode Lamb wave electromagnetic acoustic transducers (EMATs) were used to detect the debonding of aluminum/rigid polyurethane foam composite plates (ARCPs). The low energy transmission coefficient at the interface made the detection difficult. However, experimental and simulation results showed that there was a linear relationship between the amplitude of the received signals and the debonding length.
Article
Chemistry, Analytical
Marcus Haywood-Alexander, Nikolaos Dervilis, Keith Worden, Robin S. Mills, Purim Ladpli, Timothy J. Rogers
Summary: Ultrasonic guided waves provide a convenient and practical approach to structural health monitoring and non-destructive evaluation, with dispersion curves describing the relationship between frequency and propagation characteristics. Accurate dispersion curve information is valuable in many guided wave-based strategies, and can be determined through experimental observations and a system identification procedure. This study uses a scanning-laser Doppler vibrometer to record Lamb wave propagation in a composite plate and performs a Bayesian analysis using the Markov-Chain Monte Carlo method to determine dispersion curve information and infer confidence in the predicted parameters. The probabilistic approach is shown to have advantages over traditional estimation methods.
Article
Acoustics
Yuzi Liu, Youxuan Zhao, Mingxi Deng, Guoshuang Shui, Ning Hu
Summary: This study demonstrates that the one-way Lamb and SH mixing method can quantitatively evaluate and locate the damage region of quadratic nonlinearity in thin plates. Resonant behavior is observed when the primary S-0-mode Lamb waves and SH0 waves mix in the region with quadratic nonlinearity, with the acoustic nonlinear parameter increasing monotonously with material nonlinearity, damage region length, and resonant wave frequency. The study also shows that the damage region can be located using the time-domain signal of the resonant wave based on the one-way S0-SH0 mixing method.
Article
Materials Science, Multidisciplinary
Sergey Kuznetsov
Summary: The closed form solutions for guided waves propagating in anisotropic crystals reveal the existence of multiple long-wave limiting velocities, which depend on the wave normal. Numerical examples on the (1,0,0)-plane of cubic crystals show that, for most directions of the wave normal, there are two distinct long-wave limiting velocities, with the possibility of a few directions where two velocities may coincide.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Mechanics
Juan Carlos Pineda Allen, Ching Tai Ng
Summary: This paper presents a delamination damage detection technique based on the nonlinear response of Lamb waves in composite laminates. In the approach, a network of transducers is employed to sequentially scan the structure by actuating and receiving dual guided waves. The damage localization imaging algorithm is proposed to locate and determine the damage location by analyzing the cross-correlation of the signal envelope at combined frequency wave with the excitation pulse envelope at incident waves for each transducer pair.
COMPOSITE STRUCTURES
(2023)
Article
Acoustics
Weiyi Zuo, Zhongtao Hu, Zhiwu An, Yuanyuan Kong
JOURNAL OF SOUND AND VIBRATION
(2020)
Article
Engineering, Biomedical
Zhongtao Hu, Si Chen, Yaoheng Yang, Yan Gong, Hong Chen
Summary: By designing and fabricating an affordable, easy-to-use, high-precision FUS device, precise BBB opening in small animal research was achieved. The spatial precision of targeting individual brain structures was improved by using higher frequency FUS transducers.
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
(2022)
Article
Acoustics
Zhongtao Hu, Lu Xu, Chih-Yen Chien, Yaoheng Yang, Yan Gong, Dezhuang Ye, Christopher Pham Pacia, Hong Chen
Summary: This study investigates the feasibility of using four sensors for transcranial 3-D localization of cavitation during focused ultrasound therapy in the brain. The proposed method achieved accurate cavitation localization when the source was close to the geometric center of the sensor network. The simplicity and accuracy of this approach make it a promising technique for transcranial cavitation detection.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2021)
Correction
Acoustics
Zhongtao Hu, Zhiwu An, Yuanyuan Kong, Guoxuan Lian, Xiaomin Wang
Review
Soil Science
Liuwei Wang, Zhongtao Hu, Hanbing Yin, Scott A. Bradford, Jian Luo, Deyi Hou
Summary: Colloidal contaminants and pathogens in soil exhibit unique environmental behaviors and fates, which are influenced by aging mechanisms and changes in their physicochemical properties. This review provides insights into the aging processes of colloids, particularly nanoplastic contaminants and colloidal pathogens, and discusses their implications for risk mitigation.
SOIL USE AND MANAGEMENT
(2023)
Article
Physics, Applied
Zhongtao Hu, Yaoheng Yang, Lu Xu, Yun Jing, Hong Chen
Summary: This study introduces Airy-beam-enabled binary acoustic metasurfaces (AB BAMs) for underwater ultrasound-beam manipulation, designed and fabricated by 3D printing. These AB BAMs offer capabilities for flexible tuning of focal region size, 3D beam focusing, and continuous manipulation of complex acoustic fields.
PHYSICAL REVIEW APPLIED
(2022)
Article
Physics, Multidisciplinary
Zhong-Tao Hu, Zhi-Wu An, Guo-Xuan Lian, Xiao-Min Wang
CHINESE PHYSICS LETTERS
(2017)
Proceedings Paper
Engineering, Electrical & Electronic
Zhongtao Hu, Hanyin Cui, Zhiwu An, Jie Mao
2016 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IUS)
(2016)
Article
Acoustics
Maxwell J. Kiernan, Rashid Al Mukaddim, Carol C. Mitchell, Jenna Maybock, Stephanie M. Wilbrand, Robert J. Dempsey, Tomy Varghese
Summary: In this study, a method for automatically determining bounding boxes and lumen segmentation using a Mask R-CNN network trained on sonographer assisted groundtruth carotid lumen segmentations is presented. This method is of great importance for analyzing ultrasound images that require time and labor, and it also lays the foundation for developing accurate plaque segmentation and wall thickness measurement methods.
Article
Acoustics
Junzhen Wang, Jianmin Qu
Summary: This article presents the solution to guided wave fields in a double-layer plate and proposes a nonlinear spring-interface model for the bonding between the two sublayers. The study finds that the nonlinearity of the spring-interface can generate resonant guided waves in the double-layer plate, providing a theoretical foundation for the development of nondestructive evaluation techniques using nonlinear guided waves.
Article
Acoustics
Shuyuan Ye, Tianyu Peng, Zhili Long, Zhiming Jiang, Xiangqing Li, Zhonghua Cao
Summary: In this study, a novel approach based on beating vibration model is proposed for frequency tracking, which accurately determines the resonant frequency of the transducer in a short time.
Article
Acoustics
Shuling Gao, Rui Zhang, Zheng Fan, Ning Li, Yanan Yue, Lili Xie
Summary: In this study, a novel method is proposed to monitor fatigue damage in welded joints by computing the energy density in the diffuse ultrasonic signal. The results indicate that the correlation coefficient of the energy density exhibits a significant decreasing trend when crack initiation occurs, providing a unique signal to indicate crack initiation in welded joints.
Article
Acoustics
Ata Jafarzadeh, Peter D. Folkow, Anders Bostrom
Summary: This study investigates the scattering of elastic waves by an anisotropic sphere with orthorhombic symmetry inside an isotropic medium, and applies it to the characterization of polycrystalline materials with anisotropic grains. The expansion coefficients of the wave and displacement field are determined inside the sphere using recursion relations and boundary conditions. The T matrix elements are then obtained and used to analyze the attenuation and phase velocity of polycrystalline materials, particularly at low frequencies. The proposed approach shows good agreement with previous results and finite element method for strongly anisotropic materials.
Article
Acoustics
F. R. Akhmedzhanov, M. I. Elboeva, S. Z. Mirzaev
Summary: The dependence of elastic and acousto-optic properties on the direction of wave vector and polarization of acoustic and optical waves in lead molybdate crystals has been investigated. Effective photoelastic constants were determined using the Dixon method for different geometries of Bragg light diffraction. The study of the acousto-optic quality factor dependence on the direction of the wave vector of longitudinal acoustic waves in the symmetry plane revealed that the maximum and minimum values are observed when light is diffracted by pure longitudinal waves in this plane. Additionally, it was found that the acousto-optic quality factor in lead molybdate crystals is practically the same as in paratellurite crystals.
Article
Acoustics
H. Franklin
Summary: This paper investigates the interaction between double porosity distributed cylindrical bodies and the surrounding fluid using a generalized self consistent method. The study reveals that there is a correlation between the propagating waves and the effective quantities at low frequencies, which is influenced by the volume fraction of scatterers and the porosity.
Article
Acoustics
Yuchen Liu, Mahshid Hafezi, Andrew Feeney
Summary: This study investigates the use of Nitinol, a shape memory alloy, in a Langevin power ultrasonic transducer to mitigate the influence of temperature on device performance. The results demonstrate that by controlling the microstructure of Nitinol, the nonlinear softening of the piezoelectric stack can be reduced, leading to higher and more stable vibration amplitudes. Furthermore, the use of Nitinol allows for stable resonance frequency and performance even with temperature changes and continuous operation.
Article
Acoustics
Shrutika Sharma, Vishal Gupta, Deepa Mudgal
Summary: Poly Lactic Acid (PLA) based bone plates fabricated using Fused Deposition Modeling can have improved mechanical strength by biocompatible polydopamine (PDM) coating. The effect of ultrasonic assisted coating parameters on tensile strength of coated bone plates was investigated and compared using Response Surface Methodology (RSM) and machine learning (ML) models. The gradient boosting regression (GBReg) model outperformed other models in terms of accuracy and prediction performance for predicting the tensile strength of PDM coated bone plates.
Article
Acoustics
Kirill Kolesnik, Vijay Rajagopal, David J. Collins
Summary: Superstrate-based acoustofluidic devices offer advantages of cost, interchangeability and prevention of contamination between samples. This study analyzes the coupling layers and superstrate dimensions for efficient sound transmission, finding that a superstrate thickness of 0.55 times the acoustic wavelength maximizes acoustic coupling.
Article
Acoustics
Dingpeng Wang, Xiaocen Wang, Shili Chen, Jian Li, Lin Liang, Yang Liu
Summary: This paper proposes an end-to-end ultrasonic guided wave joint learning imaging method for sparse and limited-view transducer arrays, which significantly improves the quality of imaging results by integrating sparse feature reconstruction and deep learning imaging methods.
Article
Acoustics
Zubeir M. Ebrahim Saib, Anthony J. Croxford, Bruce W. Drinkwater
Summary: This paper proposes a numerical model using FDTD scheme to solve the nonlinear elastic bulk wave equations, aiming to better understand nonlinear ultrasonic techniques. The model considers material and geometrical nonlinearities and uses a stress-type boundary condition for excitation. Simulation and experimental results validate the effectiveness of the model.
Article
Acoustics
Sol R. Martinez, Emmanuel Odella, Luis E. Ibarra, Arianna Sosa Lochedino, Ana B. Wendel, Andres M. Durantini, Carlos A. Chesta, Rodrigo E. Palacios
Summary: Sonodynamic inactivation (SDI) has an advantage over optical excitation-based protocols due to the deeper penetration of ultrasound (US) excitation. In this study, we applied conjugated polymer nanoparticles (CPNs) as an efficient sonosensitizer (SS) in SDI of pathogens and characterized the sonoreactor. We found that CPNs have a germicidal effect on planktonic cultures and mature biofilms, highlighting their potential for novel inactivation protocols.
Article
Acoustics
Quentin Baudis, Tony Valier-Brasier, Regis Wunenburger
Summary: In this study, we present a detailed procedure for measuring the rheological properties of soft, highly attenuating, visco-elastic materials at ultrasonic frequencies. We use a crosslinked Polyurethane (PU) elastomer as an example and determine its complex longitudinal modulus M and shear modulus G as a function of frequency and temperature. The results show that M, G, and bulk modulus K obey the time-temperature superposition principle and can be accurately described using a fractional derivative rheological model.
Article
Acoustics
Richard E. Jacob, Matthew S. Prowant, Chris A. Hutchinson
Summary: Ultrasonic inspection of cast austenitic stainless steel (CASS) in the nuclear industry is challenging due to sound field scatter and attenuation caused by the coarse-grained microstructure. Modeling and simulation are important tools for addressing key aspects of inspections, but developing a useful and reliable CASS model is challenging. This study demonstrates a method of creating a realistic CASS model and compares it with laboratory-measured sound fields, showing promising results.
