Results 51 to 60 of about 2,473 (180)

A review on the mechanical metamaterials and their applications in the field of biomedical engineering

Frontiers in Materials, 2023
Metamaterials are a group of materials/structures which possess novel behaviors not existing in nature. The metamaterials include electromagnetic metamaterials, acoustic metamaterials, mechanical metamaterials, etc.
Hao Wang, Yongtao Lyu, Yongtao Lyu, Sergei Bosiakov, Hanxing Zhu, Yuanfei Ren   +5 more
doaj   +1 more source

Chemically Programmable Underwater Sound‐Absorbing Metamaterial via MXene Self‐Assembly

Advanced Science, EarlyView.
MXene self‐assembly creates a chemically programmable underwater metamaterial with quasi‐periodic layers and a chemical‐physical multi‐level constraint system. A crosslinker as a ‘chemical scissor’ precisely edits microscopic interactions, exciting deep‐subwavelength strong local resonances that induce near‐zero/negative effective bulk modulus (Keff ...
Ziwen Gan, Ranran Qi, Mingyi Liao, Bowen Chen, Chen Cheng, Wei Tu   +5 more
wiley   +1 more source

Menger fractal structure with negative refraction and sound tunnelling properties

Materials Research Express, 2019
We construct new quasi-three-dimensional fractal acoustic metamaterials based on adoption of the Menger structure, which offers extraordinary parameters such as double-negative properties and a near-zero density.
Yu Liu, Wenshuai Xu, Meng Chen, Dongliang Pei, Tao Yang, Heng Jiang, Yuren Wang   +6 more
doaj   +1 more source

Super‐Resolution and High‐Data‐Density Acoustic Meta‐Hologram via Amplitude and Phase Coupling

Advanced Science, EarlyView.
A super‐resolution acoustic meta‐hologram utilizes amplitude‐phase coupling under energy conservation constraints to overcome the traditional diffraction limit. This conceptually advanced approach achieves high‐fidelity acoustic field reconstruction and dense information transmission, unlocking new potentials for high‐resolution acoustic imaging and ...
Xiao Guo, Xinzong Wang, Guoshen Tang, Haohan Zeng, Siqi Fan, Xinghao Hu, Youyu Mo, Zhenyu He, Tingting Li, Hui Xu, Jiao Shen, Haiyan Fan, Xiaoxiang Gao, Yifan Zhu, Hui Zhang, Badreddine Assouar   +15 more
wiley   +1 more source

Modulating Sound with Acoustic Metafiber Bundles

Scientific Reports, 2017
Acoustic metamaterials and metasurfaces provide great flexibility for manipulating sound waves and promise unprecedented functionality, ranging from transformation acoustics, acoustic cloaking, acoustic imaging to acoustic rerouting.
Jian-ping Xia, Hong-xiang Sun, Shou-qi Yuan   +2 more
doaj   +1 more source

Design and optimization of three-dimensional composite multilayer cylindrical pentamode metamaterials for controlling low frequency acoustic waves

Scientific Reports, 2022
For three-dimensional pentamode metamaterials, it is of great significance to realize underwater low frequency acoustic wave control. Therefore, in order to compare with traditional double-cone pentamode metamaterials, two multilayer composite ...
Chengxin Cai, Xue Wang, Qifu Wang, Mingxing Li, Guangchen He, Zhaohong Wang, Yao Qin   +6 more
doaj   +1 more source

Absorption of Broadband Low‐Frequency Sound Beyond the Thermodynamics Limit: An Acoustic Resonator With Magnetic Bearing

Advanced Science, EarlyView.
This work presents a magnetic‐bearing acoustic resonator that overcomes the thermodynamics limit of sound absorption. By introducing tunable negative stiffness, it achieves broadband low‐frequency absorption within a compact cavity, far exceeding the performance achievable by classic mass‐tuned designs.
Ying Hu, Zhe Zhang, Bohua Huang, Xue Han, Hallam Bastin Kilcoyne, Lixi Huang   +5 more
wiley   +1 more source

Bistable Networks Enable Complex Shape Changes

Advanced Science, EarlyView.
Transition‐controlled metamaterials are networks of bistable mechanical memory that store local binary states and express them as global shape change. By decoupling low‐force programming from high‐force holding, a single lattice is reconfigured into distinct 2D profiles and 3D surfaces without continuous actuation, enabling reusable morphing materials ...
Sawyer Thomas, Jeffrey Lipton
wiley   +1 more source

Low-frequency attenuation signal absorption performance of thin-film acoustic metamaterials

Acta Acustica
Considering that thin film acoustic metamaterials have many special properties that natural materials and traditional materials do not possess, the low-frequency attenuation signal absorption performance of thin film acoustic metamaterials is studied ...
Xu Jingcheng, Chen Changzheng
doaj   +1 more source

Physics‐Aware Machine‐Learning‐Driven Inverse Design of Broadband Ultra‐Open Acoustic Metamaterials

Advanced Science, EarlyView.
A physics‐aware machine‐learning framework enables inverse design of ultra‐open acoustic silencers by decoupling spectral and radial design spaces. The approach rapidly identifies broadband, compact, and highly ventilated architectures, while revealing hidden linear design rules that link geometry, impedance matching, and acoustic performance.
Zhiwei Yang, Mengyu Li, Xiaohang Xie, Ao Chen, Thomas G. Bifano, Xin Zhang   +5 more
wiley   +1 more source