Article
Optics
Giampaolo Pisano, Christopher Dunscombe, Peter Hargrave, Alexey Shitvov, Carole Tucker
Summary: This paper presents a metamaterial-inspired flat conformable absorber design operating in a wide frequency range of 80-400 GHz, achieving over 99% absorbance. It is the first successful implementation of a low-profile, ultra-wideband metamaterial absorber for this frequency range and operating conditions.
Article
Engineering, Mechanical
Peng Sheng, Xin Fang, Li Dai, Dianlong Yu, Jihong Wen
Summary: This paper investigates a honeycomb sandwich plate based on nonlinear acoustic metamaterials and analyzes its vibration reduction properties through numerical and experimental methods. The results show that the plate can effectively suppress low-frequency and broadband vibrations.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Physics, Applied
Santosh Dasila, Chitti Venkata Krishnamurthy, V. Subramanian
Summary: A miniaturized, broadband absorber with high absorption rate (> 95%) has been proposed and constructed, using quarter-wavelength resonator tubes as rectangular meta-atoms. The study presents the basic theoretical aspects, numerical simulations, fabrication process, and experimental validation of the absorber. The use of simple, fabrication-friendly meta-atoms allows for greater spatial coverage by tiling over large surfaces.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Engineering, Mechanical
Xinlei Fan, Jinqiang Li, Xueyi Zhang, Fengming Li
Summary: In this paper, a metamaterial plate with low and wide frequency bandgaps is designed using complex resonators. The transmission and vibration characteristics of the plate are studied through finite element simulation and experiment, showing that the bandgaps can be adjusted by changing the structure of the complex resonators.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Engineering, Electrical & Electronic
Ting Shi, Lei Jin, Lei Han, Ming-Chun Tang, He-Xiu Xu, Cheng-Wei Qiu
Summary: In this research, a low-profile, wideband microwave metamaterial absorber with wide-angle and polarization-independent responses was proposed by controlling multiple resistive electric and magnetic resonances. The use of a vertical periodic crossed mesh array improved wide-angle polarization-independent absorption, and a dispersion-engineered design strategy for angular- and polarization-insensitive responses was described with numerical evidence and electromagnetic response behaviors. Both numerical and experimental results showed that the proposed strategy is an effective way to achieve wide-angle and polarization-independent responses in a broadband spectrum, which is promising for various strategic applications.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Physics, Applied
Zi-xiang Xu, Hai-yang Meng, An Chen, Jing Yang, Bin Liang, Jian-chun Cheng
Summary: A tunable low-frequency acoustic absorber composed of multi-layered ring-shaped microslit tubes with subwavelength thickness is proposed and experimentally verified, achieving high-efficient acoustic absorption and superior impedance manipulation capability. The proposed metastructure allows continuous tunability over a wide working frequency band and shows potential for practical engineering applications such as noise control.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Xinmeng Huang, Yan Chen, Shanjun Chen, Kang Yang, Jian Liang, Zhangkun Zhou, Wei Dai
Summary: In this paper, a metal-dielectric-metal three-layer structure of metamaterial perfect absorber is designed using FDTD. The simulation results show the presence of three absorption peaks at 878 nm, 1020 nm, and 1276 nm with absorption rates of 98.7%, 99.3%, and 99.5%, respectively. The structure can be tuned by adjusting the geometric parameters and top pattern layer, and it exhibits high sensitivity under different refractive index environments. This simple structure can be used for optical conversion devices such as optical absorption switches, splitters, and modulators.
RESULTS IN PHYSICS
(2023)
Article
Mechanics
Camila Sanches Schimidt, Leopoldo Pisanelli Rodrigues de Oliveira, Carlos De Marqui Jr
Summary: This work investigates the vibro-acoustic performance of graded piezoelectric metamaterial plates. The study shows that piezoelectric metamaterial plates with reconfigurable properties can provide enhanced vibration and sound power attenuation.
COMPOSITE STRUCTURES
(2024)
Article
Acoustics
Junyi Liu, Wenkai Dong, Ting Wang, Meixia Chen, Youmin Lu
Summary: Currently, there is a growing concern about noise pollution in ducts, and studies on sound absorption in pipes are being conducted globally. In order to tackle the issue of eliminating low-frequency noise in pipelines, a multi-resonant cavity duct metamaterial is proposed. The acoustic properties of the metamaterial are calculated using the energy method based on the Hamilton principle and the transfer matrix methodology. The results show that the duct metamaterial, with its band gaps and negative bulk modulus, achieves multiple sound absorption peaks and is beneficial for eliminating low-frequency sound. The plate-cavity interaction contributes to the excellent acoustic characteristics of the duct metamaterial for sound insulation. Parametric analysis of the proposed structure is also conducted. This study demonstrates the potential application of duct metamaterials for multi-frequency sound absorption in engineering practice.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Engineering, Mechanical
Qiang Wang, Jinqiang Li, Yao Zhang, Yu Xue, Fengming Li
Summary: A novel plate-type resonator and its bandgap properties in a metamaterial sandwich plate were studied in this research. The results showed the existence of locally resonant and Bragg bandgaps in the proposed structure. The effects of geometric parameters and surface mass ratio on the bandgaps were investigated, along with the improvements of the resonator structure to enhance performance.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Hao Sun, Yu-Sheng Lin
Summary: This article presents a tunable terahertz metamaterial consisting of double connected semicircle-shaped rings and segregated metallic bars. By manipulating the radius of the rings, the resonances can be red-shifted in both TE and TM polarizations. The device shows polarization-dependent characteristics and can be used for single-, dual-, triple-, and quad-resonance switching as well as high-efficiency environmental sensing applications.
Article
Acoustics
Hongli Ji, Ning Wang, Chao Zhang, Xiaodong Wang, Li Cheng, Jinhao Qiu
Summary: Acoustic black hole structures are gaining attention as passive damping techniques for vibration and noise suppression due to their easy implementation and broad wave focusing and energy dissipation properties. The addition of a two-dimensional circular ABH-based dynamic vibration absorber to existing structures can effectively reduce vibration, with simulation results and analyses identifying two dominant mechanisms governing the physical processes.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Optics
Pei-Jung Wu, Wei-Cheng Tsai, Chan-Shan Yang
Summary: In this study, an electrically tunable multi-band terahertz (THz) metamaterial filter based on graphene and multiple-square-loop structures was designed. The structure consists of multiple metal square loops of different sizes, which correspond to different THz frequencies, achieving the expected efficacy of a multi-band wave filter. By sweeping external voltages, the capability of the high-sensitivity THz filter can be modulated from single-band to multi-band filtering by changing graphene's Fermi levels. This hybrid THz wave filter study shows promise for the development of selecting channels in THz and 6G communications.
Article
Optics
Min Zhong
Summary: This paper presents a multi-band tunable metamaterial absorber with VO2 layer, achieving absorption peaks at different frequencies at different temperatures. Two peaks are found to be insensitive to temperature while the other two are temperature tunable.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Mechanics
Wenliang Gao, Jiaxin Hu, Zhaoye Qin, Fulei Chu
Summary: This research presents a novel perforated metamaterial plate with acoustic black holes (ABHs) interconnected by piezoelectric studs for flexural wave manipulation. It derives the governing equations of the metamaterial plate using the differential quadrature element method and the first-order shear deformation plate theory. The proposed model is validated by comparing with finite element simulation results, and the wave propagation characteristics are obtained. The results show that the introduction of piezoelectric patches in the studs brings wider complete bandgaps (BGs) and stronger collimation effect at lower frequencies.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Mechanical
Rosaria Del Toro, Maria Laura De Bellis, Marcello Vasta, Andrea Bacigalupo
Summary: This article presents a multifield asymptotic homogenization scheme for analyzing Bloch wave propagation in non-standard thermoelastic periodic materials. The proposed method derives microscale field equations, solves recursive differential problems within the unit cell, establishes a down-scaling relation, and obtains average field equations. The effectiveness of this approach is validated by comparing dispersion curves with those from the Floquet-Bloch theory.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Yue Bao, Zhengcheng Yao, Yue Zhang, Xueman Hu, Xiandong Liu, Yingchun Shan, Tian He
Summary: This paper proposes a novel triple-gradient phononic acoustic black hole (ABH) beam that strategically manipulates multiple gradients to enhance its performance. The study reveals that the ABH effect is not solely brought about by the thickness gradient, but also extends to the power-law gradients in density and modulus. The synergistic development of three different gradient effects leads to more pronounced and broader bandgaps in PCs.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Matthias Ryser, Jason Steffen, Bekim Berisha, Markus Bambach
Summary: This study investigates the feasibility of replacing complex experiments with multiple simpler ones to determine the anisotropic yielding behavior of sheet metal. The results show that parameter identifiability and accuracy can be achieved by combining multiple specimen geometries and orientations, enhancing the understanding of the yield behavior.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Wenjun Li, Pengfei Zhang, Siyong Yang, Shenling Cai, Kai Feng
Summary: This study presents a novel two-dimensional non-contact platform based on Near-field Acoustic Levitation (NFAL), which can realize both one-dimensional and two-dimensional transportation. Numerical and experimental results prove the feasibility and ease of this method.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Shuo Liu, Lu Che, Guodong Fang, Jun Liang
Summary: This study presents a novel lamina conjugated bond-based peridynamic (BB-PD) model that overcomes the limitations of material properties and is applicable to composite laminates with different stacking sequences. The accuracy and applicability of the model are validated through simulations of elastic deformation and progressive damage behavior, providing an explanation of the damage modes and failure mechanisms of laminated composite materials subjected to uniaxial loading.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Omar El-Khatib, S. Kumar, Wesley J. Cantwell, Andreas Schiffer
Summary: Sandwich-structured honeycombs (SSHCs) are hierarchical structures with enhanced mass-specific properties. A model capable of predicting the elastic properties of hexagonal SSHCs is presented, showing superior in-plane elastic and shear moduli compared to traditional honeycombs, while the out-of-plane shear moduli are reduced.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Zhi-Jian Li, Hong-Liang Dai, Yuan Yao, Jing-Ling Liu
Summary: This paper proposes a process-performance prediction model for estimating the yield strength and ultimate tensile strength of metallic parts fabricated by powder bed fusion additive manufacturing. The effect of main process variables on the mechanical performance of printed metallic parts is analyzed and the results can serve as a guideline for improvement. The accuracy of the proposed model is validated by comparison with literature.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Saman A. Bapir, Kawa M. A. Manmi, Rostam K. Saeed, Abdolrahman Dadvand
Summary: This study numerically investigates the behavior of an ultrasonically driven gas bubble between two parallel rigid circular walls with a cylindrical micro-indentation in one wall. The primary objective is to determine the conditions that facilitate the removal of particulate contamination from the indentation using the bubble jet. The study found that the bubble jet can effectively remove contamination from the indentation for certain ranges of indentation diameter, but becomes less effective for larger indentation diameters.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
E. Polyzos, E. Vereroudakis, S. Malefaki, D. Vlassopoulos, D. Van Hemelrijck, L. Pyl
Summary: This research investigates the elastic and damage characteristics of individual composite beads used in 3D printed composites. A new analytical probabilistic progressive damage model (PPDM) is introduced to capture the elastic and damage attributes of these beads. Experimental results show strong agreement with the model in terms of elastic behavior and ultimate strength and strain.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
