Article
Multidisciplinary Sciences
Xin Wu, Qiao Yan, Ahmadreza Hedayat, Xuemei Wang
Summary: The study investigates the influence of concrete aggregate particle size on the propagation and attenuation of elastic waves. Results show that larger aggregate particles lead to more severe attenuation in wave amplitude, energy spectral density, and frequency, while the elastic wave spectrum center generally decreases with propagation distance.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Multidisciplinary
Yijing Zhao, Jun Wei Chua, Yani Zhang, Wei Zhai
Summary: Fe-doped and SiC nanoparticle-loaded carbon fibrous membranes and their multiscale composites were developed for effective absorption of broadband electromagnetic waves and acoustic waves. The incorporation of nanoparticles and the design of multilayer structures allow for excellent absorption performance.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Geochemistry & Geophysics
Junxin Guo, Boris Gurevich, Xiaofei Chen
Summary: In this study, we analyze the dynamic SV-wave signatures of fluid-saturated porous rocks containing intersecting fractures. We found that the dispersion and attenuation of SV-waves have similar dependence on properties of intersecting fractures and fluid as those of P-waves, but the influence of FB-WIFF is smaller for SV-waves. In addition, WIFF and elastic scattering greatly affect the anisotropy properties of both SV- and P- waves, which are sensitive to fracture intersection angles and differ between the two types of waves. The complementary features of SV- and P- waves provide a basis for fracture intersection detection.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Optics
T. J. Zimmerling, S. Afzal, V. Van
Summary: Floquet topological photonic insulators provide more flexibility for controlling and trapping light than undriven topological insulators, and can enable novel nonlinear optics applications. In this study, resonance-enhanced frequency generation by four-wave mixing of Floquet bulk modes was demonstrated in a 2D silicon Floquet microring lattice using a resonance effect called Floquet Defect Mode Resonance (FDMR), showing potential for robust light sources on a topologically protected photonic platform.
Article
Engineering, Multidisciplinary
Sheng Wang, Zhi-tao Luo, Jian Jing, Zi-hao Su, Xin-kai Wu, Zhong-hua Ni, Hui Zhang
Summary: In this paper, a deep learning model called Elasticity Network (ENet) is proposed to rapidly characterize the elastic constants of composite laminates. The superiority and robustness of the proposed method are demonstrated through numerical and experimental verifications.
Article
Chemistry, Physical
C. Muir, B. Swaminathan, K. Fields, A. S. Almansour, K. Sevener, C. Smith, M. Presby, J. D. Kiser, T. M. Pollock, S. Daly
Summary: In this study, it was demonstrated that identifying damage mechanisms from acoustic emission signals in minicomposites with elastically similar constituents is possible. By partitioning signals through spectral clustering, matrix cracking and fiber failure were successfully identified based on the frequency information they contained, following the damage chronology.
NPJ COMPUTATIONAL MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Ku Im, Q-Han Park
Summary: The mechanism of perfect anti-reflection for acoustic waves is presented using nonlocal metamaterials to compensate for impedance mismatch. The characteristics of spatio-temporal dispersion are analyzed and the issue of total internal reflection is addressed. The practical design of the nonlocal layer using metamaterials is explained, and its omni-directional frequency-independent behavior is confirmed through numerical calculations.
Article
Acoustics
Baoguo Yuan, Jiyu Liu, Houyou Long, Ying Cheng, Xiaojun Liu
Summary: This work proposes a scheme and demonstrates a planar acoustic Luneburg lens that can focus broadband sound without aberration. The refractive indexes of the lens are obtained from acoustic metamaterials, and the lens is fabricated using 3D printing technology. The experimental results agree well with numerical simulations, and the lens is further utilized to construct a wide-angle acoustic reflector.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Physics, Applied
Le Liu, Long-Xiang Xie, Weichun Huang, Xiu Juan Zhang, Ming-Hui Lu, Yan-Feng Chen
Summary: Sound absorption is crucial for room acoustics and noise control. Acoustic metamaterials, especially those based on deep learning, show promise in achieving broadband sound absorption. This letter presents a deep learning-based acoustic metamaterial approach that achieves ultra-broadband sound absorption without visible oscillation. Results from numerical simulations and experiments demonstrate the effectiveness and versatility of this approach.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Na-Li Zhang, Sheng-Dong Zhao, Hao-Wen Dong, Yue-Sheng Wang, Chuanzeng Zhang
Summary: In this paper, a reflection-type broadband acoustic coding metasurface (BACMs) is proposed, which utilizes the coupling resonance mechanism between square helical channels and air cavities to achieve encoding and decoding functions in a wide frequency range. The application of the BACMs is demonstrated through numerical simulation and experiments, showing potential for use in the field of acoustic wave devices.
APPLIED PHYSICS LETTERS
(2022)
Article
Automation & Control Systems
Guochao Qiao, Zhao Cheng, Wei Zheng, Shicheng Yi, Fujiang Zhang
Summary: This study investigated a grinding force model for the efficient and low-damage machining of ceramic matrix composites. The developed model accurately predicts the influence of each parameter on the grinding force, providing theoretical support for parameter screening and scheme optimization in actual production.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Engineering, Civil
Quanrong Wang, Aohan Jin, Hongbin Zhan, Yu Chen, Wenguang Shi, Hui Liu, Yu Wang
Summary: The study found that errors in estimating regional flow velocity and aquifer porosity using simplified analytical models increase with increasing dispersivity. These errors also depend on the input values of regional groundwater velocity, drift time of the SWPP test, and aquifer porosity.
JOURNAL OF HYDROLOGY
(2021)
Article
Optics
Zehong Liang, Yejin Liu, Yingjun Luo, Hechong Chen, Dongmei Deng
Summary: In this study, a computational model based on catastrophe theory is proposed to design space-time wave packets with arbitrary transverse and longitudinal accelerations. Additionally, the attenuation-free Pearcey-Gauss space-time wave packet is investigated, which expands the family of non-diffracting space-time wave packets. This work may contribute to the advancement of space-time structured light fields.
Article
Engineering, Mechanical
Hua-Yang Chen, Zhen-Hui Qin, Sheng-Nan Liang, Xin Li, Si-Yuan Yu, Yan-Feng Chen
Summary: A gradient-index seismic metamaterial based on a surface acoustic PnC is proposed to provide omnidirectional protection against ultra-broadband seismic Rayleigh waves.
EXTREME MECHANICS LETTERS
(2023)
Article
Optics
Fatih Yaman, Kohei Nakamura, Eduardo Mateo, Shinsuke Fujisawa, Hussam G. Batshon, Takanori Inoue, Yoshihisa Inada, Ting Wang
Summary: Guided acoustic Brillouin noise was measured in long-distance optical transmission systems using a homodyne measurement technique. The study showed that the GAWBS noise is inversely proportional to the effective area of the fiber, and the line broadening effect of the coating was observed. The research also confirmed the correlation between the width of the GAWBS peaks and the acoustic mode profile.
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.
