Article
Materials Science, Multidisciplinary
A. A. Stashkevich
Summary: This paper addresses the significance of magnonic features caused by the quadratic dispersion of purely exchange SWs, which has become increasingly important with advancements in the excitation of ultra-short SWs. The study shows that time diffraction effects can significantly transform the signals transmitted through a magnonic channel in spintronic logic and computing devices, leading to limitations or benefits for information processing. Time diffraction can be effectively utilized to achieve pulse focusing/compression and Fourier analysis, offering new opportunities for information processing.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Optics
Hao He, Cheng Guo, Meng Xiao
Summary: This study proves the stability of space-time wave packets in dispersive media, showing that they are not affected by time spreading. It also generalizes the law of anomalous refraction for space-time wave packets in weakly dispersive situations, revealing new potential for their applications in real dispersive media.
LASER & PHOTONICS REVIEWS
(2022)
Article
Engineering, Multidisciplinary
Zhi Luo, Liang Zeng, Jing Lin
Summary: Two time-frequency domain dispersion analysis methods for broadband Lamb wave are proposed in this article, which can effectively represent multimodal Lamb wave signals with high resolution. Additionally, a mode purification strategy is also proposed for distinguishing the interested mode from interferences.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Tanuj Trivedi, Ye Chen, Ian A. D. Williamson, Praveen Pasupathy, Dean P. Neikirk
Summary: The study focuses on time-frequency analysis of dispersion in a 1-D magneto-inductive waveguide, demonstrating the potential for using such configurations as sensors. The results show precise time-frequency information, accurate defect localization, and confirm the long-range nature of dispersive MIWs, making the technique suitable for sensing applications.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2021)
Article
Multidisciplinary Sciences
Leonid Slepyan, Alexander B. Movchan
Summary: This paper provides an overview of several mathematical formulations connecting Floquet theory to the dynamic response of multi-scale waveguides, including inertial sub-structures subjected to external forces.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Article
Optics
Xiongchao Liu, Tao Shang, Dan Chen, Xiaohai Wu
Summary: A simple broadband dispersion compensation and frequency conversion scheme based on a typical commercial dual-parallel Mach-Zehnder modulator is proposed, providing single-frequency dispersion compensation and power complementarity, resulting in fully compensated RF signal power levels across a large frequency range.
OPTICS AND LASERS IN ENGINEERING
(2021)
Article
Engineering, Ocean
S. Draycott, P. K. Stansby, M. L. McAllister, T. Davey, L. Jordan, T. Tosdevin, M. Hann
Summary: This study assesses a time-reversal approach for accurately replicating experimentally generated irregular wave fields numerically, demonstrating its effectiveness in different laboratories and various sea states.
APPLIED OCEAN RESEARCH
(2022)
Article
Mechanics
Rajendran Selvamani, Farzad Ebrahami
Summary: Free thermoelastic waves in a nonlocal polygonal plate with void materials are studied using the exact heat conduction equation. The governing equations for a homogeneous thermoelastic polygonal plate in plain strain form are considered. The method of Fourier expansion collocation is employed to obtain dispersion equations of field variables along the irregular boundary, and numerical evaluations are conducted for triangular, square, pentagonal, and hexagonal plates. The simulated results of stress, strain, mechanical displacement, dimensionless frequency, frequency shift, and thermoelastic damping are presented in graphs. The convergence of the problem is tested and found to be in good agreement with existing literature.
Article
Optics
Pilar Castillo-Tapia, Kwinten Van Gassen, Qiao Chen, Francisco Mesa, Zvonimir Sipus, Oscar Quevedo-Teruel
Summary: A circular twist-symmetric dielectric waveguide that is polarization-selective was proposed. The analysis was conducted using three methods: eigenmode approach, simulation of a truncated structure, and the multimodal transfer-matrix method (MMTMM). The simulations showed that the operational band can be manipulated by tuning the parameters of the structure, and MMTMM allows for accurate calculation of the attenuation constant of the rejected circular polarization.
Article
Optics
Xiupin Wu, Wanrong Gao, Zhiyuan Qiu, Jiayong Yan, Xiaoou Li
Summary: In this study, a time-frequency analysis method was proposed to compensate for depth-dependent dispersion in noninvasive imaging. The algorithm was validated through simulation and experimental results showed a significant improvement in image resolution.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Pallabi Das, Kasturi Saha, Siddharth Tallur
Summary: This paper proposes a design platform to achieve large anomalous dispersion in vertically coupled GaN/AlN/GaN waveguides on commercially available GaN template wafers, with results showing anomalous dispersion as large as 1.83x10^5 ps (nm-km)(-1). Numerical simulations demonstrate efficient Kerr frequency comb generation in the blue spectral range, and tailoring geometric parameters of the waveguides can induce asymmetrical spectral profiles in the comb due to higher-order dispersion.
Article
Mechanics
L. Draudviliene, O. Tumsys, L. Mazeika, E. Zukauskas
Summary: A novel method is proposed for the evaluation of Lamb waves fundamental modes phase velocity dispersion and reconstruction of these curves segments using only two signals measured at two close points. The method has been experimentally verified to work with extremely high accuracy in different mediums.
COMPOSITE STRUCTURES
(2021)
Article
Acoustics
Oleg A. Godin
Summary: Research has shown that coupling between compressional and shear waves in soft sediments results in a stronger first-order contribution. Additionally, stratification of sediment density and interference of shear waves reflected within the seabed control the frequency dependence of shear-wave contribution to sound attenuation.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2021)
Article
Chemistry, Analytical
Zhaonian Wang, Jiangbing Du, Weihong Shen, Jiacheng Liu, Zuyuan He
Summary: This study demonstrates a novel method for agile dispersion engineering of integrated photonic waveguide based on a horizontal double-slot structure, achieving various flexible dispersion shapes including broadband low dispersion, constant dispersion, and linear dispersion. The proposed method shows superior performance in achieving broadband low dispersion and generating comb spectrum with power variation through numerical simulation. Significant potential for integrated photonic design automation can be expected.
Article
Optics
A. K. Shafeeque Ali, A. Govindarajan, M. Lakshmanan
Summary: This paper carries out a theoretical investigation on the propagation of spatiotemporal solitons in nonlinear metamaterial waveguides, finding that stable propagation of solitons can occur in certain conditions for both positive and negative index regimes of metamaterials.
Article
Materials Science, Multidisciplinary
Matteo Mazzotti, Ivan Bertoli, Marco Miniaci
FRONTIERS IN MATERIALS
(2019)
Article
Multidisciplinary Sciences
A. S. Gliozzi, M. Miniaci, A. O. Krushynska, B. Morvan, M. Scalerandi, N. M. Pugno, F. Bosia
SCIENTIFIC REPORTS
(2019)
Article
Multidisciplinary Sciences
Antonio S. Gliozzi, Marco Miniaci, Annalisa Chiappone, Andrea Bergamini, Benjamin Morin, Emiliano Descrovi
NATURE COMMUNICATIONS
(2020)
Article
Acoustics
Domenico Tallarico, Gwenael Hannema, Marco Miniaci, Andrea Bergamini, Armin Zemp, Bart Van Damme
JOURNAL OF SOUND AND VIBRATION
(2020)
Article
Mechanics
Vinicius F. Dal Poggetto, Federico Bosia, Marco Miniaci, Nicola M. Pugno
Summary: The search for novel designs for lightweight phononic crystals and elastic metamaterials with wide low-frequency band gaps is a significant challenge. Lattice-type materials offer a promising solution, providing lightweight properties and the possibility of tailoring mechanical and dynamic properties, with the added benefit of enabling hierarchical architectures.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2021)
Article
Mechanics
M. Miniaci, M. Mazzotti, A. Amendola, F. Fraternali
Summary: Phononic crystals and elastic metamaterials have received attention for unconventional wave control. Structures with adaptive elastic properties have been proposed for wave manipulation. External mechanical load can significantly impact band gaps induced by inertial amplification, showing notable shifts and dispersion changes. The application of external prestress can switch the structure's behavior from pass-band to stop-band, providing opportunities for real-time tunable wave manipulation.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2021)
Article
Acoustics
N. Kherraz, M. Radzienski, M. Mazzotti, P. Kudela, F. Bosia, A. S. Gliozzi, D. Misseroni, N. M. Pugno, W. Ostachowicz, M. Miniaci
Summary: Research on phononic crystal structures has led to many interesting designs, but not all are convenient for practical applications. This study proposes a new design for a phononic crystal and uses a combined numerical-experimental procedure to characterize its dynamic behavior and verify wave filtering properties in wave propagation experiments. The outlined procedure aims to standardize metamaterial development and validation procedures.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Physics, Applied
M. Miniaci, R. K. Pal
Summary: Topological physics is a growing field that explores how geometry, symmetry, and topology influence physical properties, leading to novel technological applications. In elasticity, topological protection is seen as a revolutionary approach to design waveguides with unique features arising from dispersion surface topology. Methods to study topological elastic waveguides in discrete and continuous systems are discussed, along with challenges and future research directions in this emerging field.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Vinicius F. Dal Poggetto, Federico Bosia, Marco Miniaci, Nicola M. Pugno
Summary: Spider orb webs are versatile structures optimized for prey capture and transmitting vibrations. By varying geometric characteristics and adding localized masses, the vibration spectrum of spider web geometry can be tailored to manipulate wave modes, resulting in wide complete band gaps in two-dimensional phononic crystals.
MATERIALS & DESIGN
(2021)
Article
Engineering, Mechanical
M. Mazzotti, A. Foehr, O. R. Bilal, A. Bergamini, F. Bosia, C. Daraio, N. M. Pugno, M. Miniaci
Summary: Hierarchy provides unique opportunities for advanced material design with superior properties. However, its role in vibration mitigation and wave manipulation remains unclear. In this study, we demonstrate that designing non self-similar hierarchical geometries enables the creation of periodic structures supporting multiple highly attenuative and broadband bandgaps at different frequencies. The type of band gap mechanism is identified by examining the vibrational mode shapes and dispersion diagram of the unit cell.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Marco Miniaci, Nesrine Kherraz, Charles Croenne, Matteo Mazzotti, Maryam Morvaridi, Antonio S. Gliozzi, Miguel Onorato, Federico Bosia, Nicola Maria Pugno
Summary: Recent interest in large scale elastic metamaterials as passive isolation structures for seismic waves has grown. This study investigates the feasibility of an innovative design based on hierarchical design of the unit cell, showing that hierarchy allows for smaller unit cells while maintaining or improving isolation efficiency at frequencies relevant for earthquake engineering. This suggests a step closer towards practical realization of seismic shields with essential characteristics of low-frequency operation and acceptable size.
EPJ APPLIED METAMATERIALS
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
A. S. Gliozzi, M. Miniaci, A. Chiappone, A. Bergamini, F. Bosia, E. Descrovil
2020 FOURTEENTH INTERNATIONAL CONGRESS ON ARTIFICIAL MATERIALS FOR NOVEL WAVE PHENOMENA (METAMATERIALS)
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
N. Kherraz, M. Miniaci, F. Bosia, A. S. Gliozzi, M. Onorato, N. M. Pugno
2020 FOURTEENTH INTERNATIONAL CONGRESS ON ARTIFICIAL MATERIALS FOR NOVEL WAVE PHENOMENA (METAMATERIALS)
(2020)
Article
Materials Science, Multidisciplinary
M. Miniaci, R. K. Pal, R. Manna, M. Ruzzene
Review
Materials Science, Multidisciplinary
Federico Bosia, Vinicius F. Dal Poggetto, Antonio S. Gliozzi, Gabriele Greco, Martin Lott, Marco Miniaci, Federica Ongaro, Miguel Onorato, Seyedeh F. Seyyedizadeh, Mauro Tortello, Nicola M. Pugno
Summary: Nature has developed complex structures over millions of years of evolution to achieve advanced properties and functionalities that current technology often cannot replicate. Hierarchical structures are widely observed in natural materials and play a crucial role in optimizing mechanical, thermal, and optical properties.
Article
Materials Science, Characterization & Testing
Bin Ma, Qingzhao Kong, Yewei Ding, Lin Chen, Weihang Gao
Summary: This study proposes an end-to-end damage detection framework that integrates emphasized channel attention, propagation, and aggregation-time-delay neural network (ECAPA-TDNN) with percussion techniques. The framework effectively detects internal damage within timber structures and distinguishes between different sizes of damage.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Zhiyuan Zhao, Lishuai Liu, Wen Liu, Da Teng, Yanxun Xiang, Fu-Zhen Xuan
Summary: The total focusing method (TFM) is a standard technique in ultrasonic phased array imaging and plays a crucial role in industrial non-destructive testing (NDT). This paper presents an improved TFM approach by formulating its imaging principle as a Boolean matrix and establishing a discretized tensor-based model. By employing sparse regularization strategy and a non-negative constraint solution algorithm, the proposed approach demonstrates superior capabilities in defect characterization and noise suppression compared to the traditional TFM.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Dongsoo Lee, Jung-Doung Yu, Seokgyu Jeong, Geunwoo Park, Jong-Sub Lee
Summary: This study suggests a more accurate method for evaluating the integrity of drilled shafts using electromagnetic waves propagating through transmission lines. The experimental results show that the location and size of sound and defect segments can be more clearly identified with the use of connectors on the transmission line.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Lu-Nan Dai, Chen-Yin Ni, Kai-Ning Ying, Ling Yuan, Zhi Yang, Wei-Wei Kan, Zhong-Hua Shen
Summary: A laser ultrasonics based frequency domain synthetic aperture focusing technology has been developed for imaging internal horizontal hole defects in bimetallic composites with a diameter of approximately 1.0 mm. The results show that this technology can improve imaging quality and locating capability, with a low testing error.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Guillermo Cosarinsky, Jorge F. Cruza, Mario Munoz, Jorge Camacho
Summary: This study develops an ultrasound imaging method for industrial and structural components, which can automatically detect the surface and estimate the probe position and orientation. By fitting the parametric models based on measured surface echoes, the method achieves the measurement of surface echoes and estimation of probe position and orientation. Validation experiments show that this method can accurately detect defects in the component under different probe positions and orientations.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
L. Gahleitner, G. Thummerer, G. Mayr, G. Mayr, P. Burgholzer, U. Cakmak
Summary: This study presents a one-dimensional photothermal method using the virtual wave concept to estimate subsurface interface parameters and demonstrates its application in layered materials. Experimental results validate the accurate estimation of interfacial parameters for the analyzed samples.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Pengxiang Ji, Yiming Jiang, Ruobing Zhao, Jing Zou
Summary: Computed laminography (CL) is a non-destructive imaging technique for plate-like samples that has challenges in exact reconstruction. Fusion laminography (FL) combines Fourier information from CL and CT to achieve precise reconstruction, showing superiority in artifact removal and edge preservation, particularly for irregular sample structures.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Guangzhi Chen, Odile Abraham, Damien Pageot, Olivier Durand, Mathieu Chekroun, Vincent Tournat
Summary: This paper investigates the application of Nonlinear Coda Wave Interferometry (NCWI) method in evaluating the nonlinear interface areas in highly heterogeneous materials. An experimental protocol is proposed and validated through numerical simulation and experimental results. The findings demonstrate that NCWI can be used to quantitatively analyze the nonlinear interface effects in complex media.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Ronghua Xu, Raul Enrique Beltran-Gutierrez, Max Kaeding, Alexander Lange, Steffen Marx, Joern Ostermann
Summary: This study compares the signal response of four different couplant materials in acoustic emission analysis and ultrasonic testing, and analyzes their impact on the signal response of a piezoelectric sensor. The results indicate that acrylic adhesive pads and hot glue demonstrate more reliable signal transmission in certain frequency ranges, while honey and vaseline perform better in other frequency ranges. Acrylic adhesive pads and honey are considered the preferred couplant materials.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Yong-Ho Kim, Jung-Ryul Lee
Summary: An artificial intelligence system for phased-array ultrasonic testing (PAUT) was developed in this study using a newly configured training dataset and neural network. Three experiments were conducted to verify its performance, showing improved classification accuracy of signals and successful data evaluation, benefiting the PAUT experts.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Shaun Mcknight, S. Gareth Pierce, Ehsan Mohseni, Christopher Mackinnon, Charles Macleod, Tom 'Hare, Charalampos Loukas
Summary: This work proposes four synthetic data generation methods to address the issue of limited training data in Non-Destructive Ultrasonic Testing. Experimental results demonstrate that these methods significantly improve the classification performance of real experimental images.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Xintao Xu, Zhixuan Chang, Eryong Wu, Shiwei Wu, Jian Chen, Keji Yang, Haoran Jin
Summary: This paper proposes a novel nozzle-side inspection method based on the data fusion of multi-view plane wave imaging (PWI) for ultrasonic non-destructive testing of nozzle-to-pipe welds. Experiments demonstrate the capability of sensitivity mappings to optimize the inspection configuration and serve as filters to fuse multi-view images. The proposed method enables accurate defect characterization and detection of slag, cracks, and lack of penetration in nozzle specimens.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Kai Wang, Zechen Luo, Shuang Xu, Wenxin Lai, Ruiqi Guan, Qijian Liu, Menglong Liu, Jing Rao, Xinlin Qing
Summary: In this study, an analytical framework is proposed to interpret the formation of defect-induced LDR in multilayered structures. By analyzing the reflections of Lamb waves at defect boundaries and obtaining the phase shift of reflected waves, the relationship between LDR frequency components and defect size is determined. Experimental validations are performed to improve the precision of defect characterization using LDR.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Shijie Jin, Chengjun Di, Jiakai Su, Siqi Shi, Zhongbing Luo
Summary: This paper proposes a mirrored composite-mode total focusing method (CTFM) for the quantitative detection and profile characterization of priori unknown irregular planar defects. Multiple views and normalization are used to achieve accurate imaging results.
NDT & E INTERNATIONAL
(2024)
