Article
Mechanics
Tianyue Yuan, Xiang Song, Jingjian Xu, Baorui Pan, Dan Sui, Heye Xiao, Jie Zhou
Summary: This study designs a tunable acoustic composite metasurface with significant advantages in sound absorption performance. The phase gradient adjustment and resonance dissipation contribute to its excellent sound absorption ability. The modified microperforated panel system and the coiling-up space cavity enable the metasurface to achieve excellent sound absorption in both low and high frequency ranges.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Yifan Zhu, Aurelien Merkel, Krupali Donda, Shiwang Fan, Liyun Cao, Badreddine Assouar
Summary: The study introduces the concept of a nonlocal acoustic metasurface absorber using a bridge structure to improve performance, achieving ultrabroadband sound absorption with deep-wavelength thickness. The nonlocality introduces three specific effects, optimizing effective acoustic impedances, shifting Fabry-Perot resonant frequencies, and enhancing coupling effects between adjacent unit cells, contributing to improved bandwidth and efficiency.
Article
Physics, Applied
Qinhong Li, Xiao Xiang, Li Wang, Yingzhou Huang, Xiaoxiao Wu
Summary: The emergence of acoustic metamaterials in the last two decades has provided new possibilities for controlling sound waves. However, a ventilated sound switch that can achieve both satisfying sound transmission and ventilation has not been proposed until now. In this work, a topological ventilated sound switch based on the one-dimensional acoustic Su-Schrieffer-Heeger model is demonstrated, which can switch the sound on or off while maintaining desired ventilation performance.
APPLIED PHYSICS LETTERS
(2023)
Article
Optics
Bin Ren, Yuxin Feng, Shuai Tang, Jin-Lei Wu, Bingyi Liu, Jie Song, Yongyuan Jiang
Summary: In this work, an ultrathin 2-bit anisotropic Huygens coding metasurface (AHCM) composed of bilayer metallic square-ring structures is designed for flexible manipulation of terahertz waves. By excitation of electric and magnetic resonances on coding meta-atoms, full phase coverage and significantly low reflection are achieved. Anomalous refraction of x- and y-polarized incident waves in opposite directions is accomplished by encoding the elements with distinct coding sequences. In addition, the designed AHCM can also serve as a transmission-type quarter-wave plate, demonstrating its multifunctionality.
Article
Acoustics
Ahmad Yusuf Ismail, Jisan Kim, Se-Myong Chang, Bonyong Koo
Summary: This paper presents a study on the impact of Helmholtz resonator-based acoustic metasurface on sound transmission loss. By optimizing the design variables of the metasurface, such as the number of cells, thickness, and multilayering, the noise reduction performance of the system can be improved. Experimental validation and numerical results demonstrate the effectiveness of the proposed design.
Article
Engineering, Aerospace
YiHeng Guan, Dan Zhao, Thien Sen Low
Summary: Different types of porous foams exhibit varying acoustic damping capabilities, with material density and thickness having a significant impact on noise damping performance. Increasing material density does not necessarily lead to improved noise damping at lower Helmholtz numbers (<0.17), while varying thickness of the same samples can result in dramatic changes in noise damping behavior at low Helmholtz number range (<0.35). Ultimately, the study highlights the potential for optimizing acoustic damping performance of porous foams by examining the effects of porosity, material density, and thickness.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Physics, Applied
M. Mallejac, P. Sheng, V Tournat, V Romero-Garcia, J-P Groby
Summary: In this paper, a passive treatment method that considers the time domain and multiple reflections is proposed. A delay line is designed using slow-sound propagation in periodic structures, allowing the reproduction of sound perception over a larger distance. The limitations of real-time pulse propagation, dispersion, and losses on audio fidelity are also discussed.
PHYSICAL REVIEW APPLIED
(2022)
Article
Chemistry, Multidisciplinary
Hai Lin Wang, Hui Feng Ma, Mao Chen, Shi Sun, Tie Jun Cui
Summary: A reconfigurable multifunctional metasurface is proposed in this paper, which demonstrates real-time control of transmission, absorption, and reflection of electromagnetic waves, as well as independent control of vertical and horizontal polarized waves, with broad application potential.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Physics, Applied
Hongxing Liu, Jiu Hui Wu, Fuyin Ma
Summary: An acoustic metasurface was proposed to achieve continuously tunable sound absorption at sub-wavelength thickness by introducing a rotatable plate into a variable-diameter semi-cylindrical cavity. This method enabled perfect impedance matching between structure and air within a frequency range of 300-1500 Hz.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Engineering, Mechanical
Nansha Gao, Jianguo Wu, Kuan Lu, Haibin Zhong
Summary: This study proposes a composite meta-porous structure to improve the sound absorption performance of porous materials, and finds that the hybrid structure with periodic boundary exhibits high sound absorption in a certain frequency range, validated through theoretical models and finite element methods. The research also shows that different boundaries have varying effects on the sound absorption performance.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Acoustics
Jung -San Chen, Yu-Ting Chung, Cheng-Yi Wang, Chien-Hao Liu, Chi-Hua Yu, I-Ling Chang, Tzy-Rong Lin
Summary: A novel compact design for an acoustic metasurface containing coplanar arch-like channels (ALC) is proposed in this study. The ALC is compressed within a compact disk-shaped volume with a small thickness for absorbing undesired sound energy at low frequencies in limited-volume circumstances. An impedance-based analytical model is proposed and used for accurately determining the absorption characteristics of arch-like channels. Varied channel widths can effectively lower the operating frequency compared to a uniform cross-section. The use of multiple branches with different width arrangements can create a multi-peak absorption profile and broaden the absorption bandwidth. The proposed structure has great potential for applications in noise abatement.
Article
Engineering, Electrical & Electronic
Xinyun Song, Xudong Bai, Weiren Zhu
Summary: A varactor-based metasurface is proposed in this paper for dynamic and continuous modulation of reflection, transmission, and absorption. By controlling the bias voltages applied to the varactors, nearly full-range and continuous modulation of reflection, transmission, and absorption can be achieved.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
John Marc C. Puguan, Arni Gesselle M. Pornea, James Laurence A. Ruello, Hern Kim
Summary: A flexible nanofibrous aerogel with laser-cut perforations was developed for effective sound absorption and insulation. By turning PET waste bottles into nanofibers, a 3D porous network was created, allowing for noise reduction and increased transmission loss. The addition of perforations further enhanced the material's sound absorption.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Optics
Z. A. Awan, Jaweeria Hayat, Divitha Seetharamdoo
Summary: A methodology for obtaining the reflection and transmission dyads from a general bianisotropic metasurface under oblique incidence has been developed. The study focuses on a metasurface composed of chiral spheres and demonstrates that the reflection, transmission, and absorption properties can be controlled through the chiral parameter.
Article
Physics, Applied
Yukun Zhou, Xueyong Zhang, Ying Wang, Yan Feng
Summary: The study introduces a low-frequency dual-band perfect acoustic absorption metaporous material, constructed by introducing Helmholtz resonance and Fabry-Perot resonance, achieving high-efficiency broadband acoustic absorption and showing potential for reducing low-frequency noise.
APPLIED PHYSICS EXPRESS
(2021)
Article
Acoustics
Guosheng Ji, Jiang Cui, Yi Fang, Shanshan Yao, Jie Zhou, Jang-Kyo Kim
Article
Engineering, Mechanical
Guosheng Ji, Yi Fang, Jie Zhou
EXTREME MECHANICS LETTERS
(2020)
Article
Physics, Applied
Jingwen Guo, Jie Zhou
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2020)
Article
Mechanics
Dan Sui, John E. Huber, Jie Zhou
Summary: The study utilizes superposition theory to analyze the boundary value problem of needle domains in barium titanate single crystals, revealing conditions for stabilizing needle domains and presenting simulation results of comb-like array evolution.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2021)
Article
Acoustics
Heye Xiao, Chi Z. Xu, Pei X. Yu, Jin T. Gu, Dan Sui, Jie Zhou
Summary: This study proposes an analytical method for building a vibro-acoustic model of a panel-cavity system induced by a turbulent boundary layer excitation. The effects of boundary conditions on the vibro-acoustic responses of the system are then investigated. The study demonstrates that the decrease of boundary stiffness reduces the radiated sound power of the panel above the frequency of the panel third mode, while the boundary damping decreases the vibro-acoustic response of the panel-cavity system. Additionally, the increase of radiated sound power with different wall impedances is due to the coupling between the structural mode of the panel and the acoustic mode of the cavity or the resonance of the acoustic mode in the vibration propagation direction.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Materials Science, Multidisciplinary
Wenhao Sun, Baorui Pan, Xiang Song, Heye Xiao, Jie Zhou, Dan Sui
Summary: This study focuses on the design, prediction, and validation of a novel composite sound absorber similar to the feather surface structure of barn owls. It demonstrates that a nanofibrous membrane can effectively enhance the acoustic performance of porous materials and provides a suitable thickness range for improving sound absorption coefficient.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Heye Xiao, Tianyue Yuan, Xiang Song, Junli Chen, Jie Zhou, Dan Sui, Jintao Gu
Summary: This paper proposes a subwavelength porous meta-liner that can effectively reduce the noise level of the propeller in the design frequency and broadband frequency range.
FRONTIERS IN MATERIALS
(2022)
Article
Engineering, Marine
Heye Xiao, Chizhen Xu, Ruobing Wang, Peixun Yu, Jie Zhou, Junqiang Bai
Summary: This study proposes a nonlinear model and parameter identification method for rubber isolators to analyze their transient responses under shock excitation. By using a multilayer feed-forward neural network for parameter search, accurate parameters were determined through simulation and experiments.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Acoustics
Heye Xiao, ChiZhen Xu, Focai Yuan, Xudong Zhang, Junqiang Bai, Jie Zhou
Summary: This paper proposes nonlinear dynamic models of packaging systems considering different excitations and cushioning materials, and solves the nonlinear dynamic equations using a combination of the Newmark method and Newton-Arithmetic mean method. The results show the accuracy and effectiveness of the proposed method, and analyze the effects of excitation parameters on the dropping damage boundary curves (DDBCs) of the packaging systems.
SHOCK AND VIBRATION
(2022)
Article
Mechanics
Tianyue Yuan, Xiang Song, Jingjian Xu, Baorui Pan, Dan Sui, Heye Xiao, Jie Zhou
Summary: This study designs a tunable acoustic composite metasurface with significant advantages in sound absorption performance. The phase gradient adjustment and resonance dissipation contribute to its excellent sound absorption ability. The modified microperforated panel system and the coiling-up space cavity enable the metasurface to achieve excellent sound absorption in both low and high frequency ranges.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Mechanical
Guosheng Ji, Jingjian Xu, Jie Zhou, Wenbin Kang
Summary: This study investigates the acoustic properties and design methods of circular-interface types of acoustic metamaterials (CAMs) based on the generalized Snell's law. The results show that porous CAMs have significantly enhanced sound insertion loss compared to uniform foam materials of the same thickness.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Mathematics
Tianfei Zhao, Baorui Pan, Xiang Song, Dan Sui, Heye Xiao, Jie Zhou
Summary: This study proposes a three-parameter analytical model for sound propagation in porous media, specifically sintered metal fibre materials. The model is modified and used to establish relationships between microstructure properties and non-acoustical parameters. Two heuristic approaches are developed for inverse acoustic characterization. The results demonstrate that the model is capable of accurately describing the acoustic properties of sintered metal fibre materials.
Article
Acoustics
Xiang Song, Jingjian Xu, Tianyue Yuan, Wenhao Sun, Dan Sui, Heye Xiao, Jie Zhou
Summary: Acoustic liners play a crucial role in reducing noise in ducts. This study extends the multimodal method based on the finite-difference method to predict the acoustic field in a rectangular duct with a finite porous material liner and validates it through experimentation. A modified immersed interface method is developed for the air-porous interface problem without flow, and treatments for the interface problem and pressure continuity between the wall and liner are also provided when flow exists. Three methods for describing the porous liner using surface impedance, including normal impedance, shear impedance, and a cavity filled with the equivalent fluid, are introduced. The comparison among the three methods demonstrates that the extended method utilizing a cavity filled with the equivalent fluid provides more accurate acoustic evaluation of porous liners. The analysis shows that shear impedance reasonably represents the influence of porous material in comparing transmission loss curves of liners with different lengths and depths at various Mach numbers. In most cases, the prediction using shear impedance is closer to simulations with the cavity filled with porous material than with normal impedance, which is only reliable for very short and deep cavities.
JOURNAL OF VIBRATION AND CONTROL
(2022)
Article
Chemistry, Physical
Wenhao Sun, Guosheng Ji, Junli Chen, Dan Sui, Jie Zhou, John Huber
Summary: A novel nanofibrous membrane-based triboelectric nanogenerator (TENG) is developed to harvest acoustic energy from the environment. The TENG is ultra-thin, lightweight, and compact. By optimizing the concentration ratio of three nanocomponents, the TENG delivers higher electric output than single-component TENGs. The findings demonstrate the potential of acoustic TENGs with multiple nanocomponents for various applications, including microelectronics and the Internet of Things.
Article
Engineering, Aerospace
Xiao Han, Peixun Yu, Junqiang Bai, Jie Zhou, Xiang Song
AEROSPACE SCIENCE AND TECHNOLOGY
(2020)
Article
Mechanics
Rawan Aqel, Patrick Severson, Rani Elhajjar
Summary: A novel core splice joint configuration for composite sandwich structures is studied and proposed to improve the strength and toughness. Experimental and numerical efforts show that this configuration can significantly increase the ultimate strength by 13% to 51% and the toughness by 2% to 35%.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xianheng Wang, Cong Chen, Jinsong Zhang, Xinming Qiu
Summary: In this paper, a new form-finding method based on spatial elastica model (FMSE) is proposed for elastic gridshells. The method integrates the deformations of elastic rods into the overall deformation of the gridshell, and solves a set of transcendental equations using the quasi-Newton method to ensure the deformation satisfies the given boundary conditions. The method is validated through experiments and expected to have potential applications in the investigations of elastic gridshells.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Hao Huang, Zitong Guo, Zhongde Shan, Zheng Sun, Jianhua Liu, Dong Wang, Wang Wang, Jiale Liu, Chenchen Tan
Summary: The conventional evaluation of 3D braided composites' mechanical properties through numerical and experimental methodologies hinders material application due to the expenses, time constraints, and laborious efforts involved. This study establishes a multi-scale finite element model and a surrogate model for predicting the elastic properties of 3D4D rotary braided composites with voids. By optimizing a neural network model, the results are validated and provide valuable insights into the microstructure and properties of these composites.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xinyu Li, Hao Zhang, Haiyang Yang, Junrong Luo, Zhongmin Xiao, Hongshuai Lei
Summary: Due to their excellent mechanical properties and design flexibility, fluted-core composite sandwich structures have gained significant attention in aerospace and rail transit applications. This study investigated the free-vibration characteristics and optimized design of composite fluted-core sandwich cylinders through theoretical models and experimental tests.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Chao Li, Chunzheng Duan, Xiaodong Tian, Chao Wang
Summary: A mechanistic model considering the bottom edge cutting effect and the anisotropic characteristics of the material is proposed in this paper to accurately predict cutting forces. The model was validated through a series of milling experiments and can be used to predict the cutting force of various parts of the cutter and any feed direction.
COMPOSITE STRUCTURES
(2024)
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
Mechanics
Jun Ke, Li-jie Liu, Zhen-yu Wu, Zhong-ping Le, Luo Bao, Dong-wei Luo
Summary: Compared with other green natural fibers, ramie has higher mechanical properties and lower cost. In this study, ramie and glass fiber are made into composite circular tubes. The results show that the hybrid circular tube with ramie and glass fiber has improved torsional mechanical properties and reduced weight and cost. The failure mechanisms are affected by the loading direction and the content of each fiber.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Natalia Pingaro, Gabriele Milani
Summary: This paper proposes an enhanced analytical model for predicting the behavior of FRCM samples tested under standard tensile tests. The model takes into account the interaction between fibers and matrix through the interface, and assumes different material properties at different phases. By solving a second order linear differential equation, an analytical solution can be obtained. The model is validated with experimental data and shows good predictability.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jialiang Fan, Anastasios P. Vassilopoulos, Veronique Michaud
Summary: This article investigates the effects of voids, joint geometry, and test conditions on the fracture performance of thick adhesive Double Cantilever Beam (DCB) joints. It concludes that grooved DCB joints with low void content tested at low displacement rates showed stable crack propagation without significant crack path deviation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Auwalu I. Mohammed, Kaarthikeyan Raghupathy, Osvaldo De Victoria Garcia Baltazar, Lawson Onokpasah, Roger Carvalho, Anders Mogensen, Farzaneh Hassani, James Njuguna
Summary: This study investigates the performance of composite pressure vessels under damaged and undamaged conditions, providing insights into their reliability and residual strength capabilities. The results demonstrate that the damage profile and its effect on compressive strength are similar between damaged and non-damaged cylinders. When subjected to quasi-static compression, the polyethylene liner absorbs enough elastic strain energy to recover without plastic deformation. Additionally, quasi-static compression has little to no influence on the axial strength of the cylinders. The damage characterization reveals fiber breakage, delamination, local buckling, and brooming failure. This study has direct implications for the safety design tolerances, manufacturing strategies, and operational failure conditions of composite overwrapped pressure vessels (COPVs).
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Muhammad Irfan Shirazi, Samir Khatir, Djilali Boutchicha, Magd Abdel Wahab
Summary: Structural health monitoring is important to ensure the safety of components and structures. This study proposes a method using finite element models and 1D-CNN network to extract and classify vibration responses for crack detection. The results show that the proposed approach is effective in real-time damage detection.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Maryam Mirsalehi, Kiarash Kianpour, Sharif Shahbeyk, Mohammad Bakhshi
Summary: This study comprehensively investigates the one-way response of 3D-woven sandwich panels (3DWSPs) and their interfering parameters, providing interpretation of elastic and failure results, failure maps, and reliable theoretical models for linear elastic response and observed failure mechanisms.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Yiming Zhao, Zhonggang Wang, Zhigang Yang, Bin Qin
Summary: The paper proposes a Ritz and statistical energy analysis (Ritz SEA) hybrid method for calculating rectangular plate acoustic vibration coupling in the mid-frequency range. This method combines the fast convergence and ability to handle arbitrary boundary conditions of the Ritz method with the power flow equation of the statistical energy analysis method. The results show that this approach effectively filters out random fluctuations in mid-frequency domains while demonstrating exceptional stability and precision.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Joao Henrique Fonseca, Woojung Jang, Dosuck Han, Naksoo Kim, Hyungyil Lee
Summary: This study addresses the enhancement of an injection-molded fiber-reinforced plastic / metal hybrid automotive structure and its plastic injection molding process through the integration of the finite element method, artificial intelligence, and evolutionary search methods. Experimental validation of finite element models, the generation of a database through orthogonal array and Latin hypercube methods, and the training of artificial neural networks are conducted. The genetic optimization algorithm is then applied to identify optimal process parameters. The results show significant reduction in product warpage and manufacturing time while maintaining structural strength, contributing to the advancement of composite automotive structures with superior quality.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Alessandro Vescovini, Carina Xiaochen Li, Javier Paz Mendez, Bo Cheng Jin, Andrea Manes, Chiara Bisagni
Summary: This paper presents a study on six single-stringer specimens manufactured using the card-sliding technique with non-crimp fabrics and adopting a Double-Double (DD) stacking sequence. The specimens were tested under compression loading conditions to investigate post-buckling and failure in aerospace structures. Experimental results and numerical simulations were compared to analyze the behavior and failure modes of the specimens. The study found promising evidence of a viable solution to optimize aeronautical structures and enhance resistance to skin-stringer separation, particularly with the use of tapered flanges.
COMPOSITE STRUCTURES
(2024)
