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        <title>Frontiers in Materials | Metamaterials section | New and Recent Articles</title>
        <link>https://www.frontiersin.org/journals/materials/sections/metamaterials</link>
        <description>RSS Feed for Metamaterials section in the Frontiers in Materials journal | New and Recent Articles</description>
        <language>en-us</language>
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        <pubDate>2026-05-12T20:23:43.760+00:00</pubDate>
        <ttl>60</ttl>
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        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fmats.2025.1626945</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fmats.2025.1626945</link>
        <title><![CDATA[Acoustic and mechanical metamaterials for various applications – a brief review]]></title>
        <pubdate>2025-07-10T00:00:00Z</pubdate>
        <category>Review</category>
        <author>Fuyin Ma</author>
        <description><![CDATA[Due to the sub-wavelength structural characteristics and excellent wave regulation ability, metamaterials have important application value regulating acoustic and elastic waves. After more than 20 years of continuous development, the achievements of acoustics and elastic metamaterials have become very abundant. Especially in recent years, with the increasingly close integration with engineering application scenarios, metamaterials have shown important application value in many fields, such as aviation, aerospace, ships, rail vehicles, automobiles, home appliances, and architecture. Therefore, in order to promote the development of metamaterials in applications, we have organized three special issues, attracted the attention of many scholars, and received more than 30 submissions. To provide better guidance for the subsequent application research of metamaterials, we will briefly introduce the main breakthroughs in metamaterial applications at present, including sound absorption, sound insulation, vibration absorption, vibration isolation, noise reduction with ventilation, and acoustic detection and communication.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fmats.2024.1489885</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fmats.2024.1489885</link>
        <title><![CDATA[Temperature-tunable topological zero-refraction acoustic metamaterials]]></title>
        <pubdate>2024-10-16T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Yangyang Chu</author><author>Tong Sun</author><author>Zhaohong Wang</author><author>Zhifeng Zhang</author>
        <description><![CDATA[Zero-refractive index metamaterials have a wide range of applications in directional transmission and wave-front shaping due to their unusual acoustic properties. However, for most given acoustic topological metamaterials, the operating frequency is relatively fixed and the effect of temperature on their topological properties is rarely considered. Therefore, temperature-controlled tunable topological zero-refraction acoustic metamaterials are proposed in this paper. Firstly, a metamaterial with quadruple degenerate Dirac-like points at the center of the Brillouin zone is constructed, and the influence of temperature on the Dirac-like points is analyzed. The results show that the topological bandgap frequency range is more sensitive to temperature. The existence of pseudospin-polarized edge state is demonstrated by analysing the band structure of supercells with different topological phase phonon crystal. The topological zero-refraction property of the edge states outcoupled into free space is numerically demonstrated, and the non-contact active control of their operating frequencies can be realized by temperature. This study can provide a corresponding reference for the intelligent control of near-zero refractive index acoustic topological materials in elastic wave collimation and acoustic communication.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fmats.2024.1479398</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fmats.2024.1479398</link>
        <title><![CDATA[Design and performance optimization of a novel lens antenna for emerging beyond 5G wireless applications]]></title>
        <pubdate>2024-09-23T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Jinhua Zhang</author><author>Shi Dong</author><author>Deema Mohammed Alsekait</author><author>Imran Khan</author><author>Pi-Chung Wang</author><author>Ibrahim A. Hameed</author>
        <description><![CDATA[IntroductionThis paper proposes a novel all-dielectric design of lens antenna and its performance is optimized using genetic algorithm (GA). The optimization objective are 1-dB and steady gain that are directly optimized. The GA also optimizes the topological design of the lens. MethodsThe method consists of two main components: the design of the objective function and the initial population selection. The first lens structure fed into the algorithm and the initial population match. The lens has a diameter of 150 mm and a thickness of 30 mm at its thickest point with working frequency of 6–18 GHz. The 3D printing technology is used for the antenna fabrication that reduces the implantation cost. ResultsThe experimental results show that the gain and peak aperture efficiency of the proposed antenna are 23.8 dBi and 51.9%, respectively, better than those of the existing designs. DiscussionIt advantages are low-cost, easy to fabricate, simple design, high gain, narrow beams, low side lobes. It can be used in future ultra-wideband (UWB) applications.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fmats.2024.1461722</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fmats.2024.1461722</link>
        <title><![CDATA[Broadband acoustic pseudospin topological states based on the reverse spin-orbit coupling in generalized insulators]]></title>
        <pubdate>2024-09-09T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Chongrui Liu</author><author>Yibing Lu</author><author>Zhenxin He</author><author>Wenliang Guan</author><author>Zhen Huang</author>
        <description><![CDATA[Acoustic topological insulators have the excellent characteristic of the pseudospin-dependent one-way transmission of sound edge states immune to backscattering. We realize the broadband acoustic pseudospin topological edge states with subwavelength generalized topological insulators, which is achieved by reverse pseudospin-orbit coupling. The subwavelength band and broadband nontrivial bandgap can be achieved by adjusting the topological structure of the scatterers and introducing resonators. The results demonstrate that the resonator can significantly reduce the frequencies of p-states and d-states by introducing resonance scattering; the scattering size and rotation angles change the frequencies of p-states and d-states in opposite directions by adjusting the distribution of the sound field. Then, we experimentally realize the pseudospin-dependent one-way transmission of sound edge states along the interface separating phononic crystals with distinct topological phases. Our research provides a systematic scheme for the design of acoustic topological insulators with versatile applications.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fmats.2024.1453905</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fmats.2024.1453905</link>
        <title><![CDATA[A review on the auxetic mechanical metamaterials and their applications in the field of applied engineering]]></title>
        <pubdate>2024-08-06T00:00:00Z</pubdate>
        <category>Review</category>
        <author>Volha Siniauskaya</author><author>Hao Wang</author><author>Yadong Liu</author><author>Yuhang Chen</author><author>Michael Zhuravkov</author><author>Yongtao Lyu</author>
        <description><![CDATA[Metamaterials are artificially created materials or structures with properties not found in nature. They encompass electromagnetic, acoustic, and mechanical metamaterials, which are particularly significant in applied engineering. Mechanical metamaterials exhibit unique mechanical properties such as vanishing shear modulus, negative Poisson’s ratio, negative compressibility, etc. This paper reviews the most commonly used mechanical metamaterials and discusses their applications in the field of applied engineering, specifically in vibration isolation, energy absorption, and vibration reduction. The prospects for future developments in this field are also presented.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fmats.2024.1428912</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fmats.2024.1428912</link>
        <title><![CDATA[Design and performance evaluation of a compact radiation absorber for 5G applications]]></title>
        <pubdate>2024-07-31T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Imran Khan</author><author>Asma Alshehri</author><author>Pi-Chung Wang</author><author>Ibrahim A. Hameed</author>
        <description><![CDATA[Introduction: The emergence of electromagnetic wave pollution as a new form of pollution in human society is attributed to the advancements in communication technology and the electronic information business. In addition to harming priceless electronic equipment, these electromagnetic radiation and interference issues brought on by electrical and electronic devices have a major negative influence on human productivity and wellbeing. The secret to getting rid of electromagnetic radiation interference (EMI) and improving performance is electromagnetic shielding technology. Metamaterial absorber is a type of metamaterial that absorb EMI radiation. The benefits of metamaterial absorbers include their lightweight, simple construction, and excellent absorptivity.Methods: This paper proposes a novel metamaterial absorber for EMI radiation absorption. It consists of dielectric layers, metamaterial shielding layer and transmission line. The reflection of radiation is reduced by miniaturization of metamaterials.Results and Discussion: Simulation results show that the proposed design has better performance as compared to existing methods. The operating frequency range is from 23.1 to 28.3 GHz. The values of S21 with and without shielding are −5 dB and −0.05 dB, and the shielding effectiveness is 10.10 dB and a maximum of 12.63 dB.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fmats.2024.1407850</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fmats.2024.1407850</link>
        <title><![CDATA[Study on the vibration suppression mechanisms of the lightweight flexible metamaterial sticker with non-independent resonators]]></title>
        <pubdate>2024-05-27T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Guojian Zhou</author><author>Kuan Lu</author><author>Minghui Lu</author><author>Yan Liu</author>
        <description><![CDATA[The working mechanism of an acoustic metamaterial (AM) for broadband elastic vibration suppression with non-independent local resonators is presented in this paper along with the general formulas for the effective mass (EM), dispersion relation, and transmission spectrum (TR) of this metamaterial unit. A kind of flexible metamaterial sticker that is lightweight and skillfully uses flexible materials is proposed based on a theoretical approach. The flexible metamaterial sticker has a surface density of only 2.22 kg/m2 and an overall thickness of only 3 mm. It is made by depositing the flexible cylindrical supports in a square lattice pattern on the surface of the flexible plate. The finite element method (FEM) was used to systematically investigate the band structures, frequency response function (FRF), dynamic effective mass density (EMD), as well as the formation mechanisms of the flexural vibration bandgaps (FVBGs) of the metamaterial plates (composite structure after applying the metamaterial sticker). Additionally, a thorough analysis was conducted on the impacts of geometrical parameters (the rubber cylinder thickness, the flexible material plate thickness, the lattice constant, and the rubber cylinder radius) on the FVBGs. Finally, an overall vibration attenuation for the proposed metamaterials was estimated by using the spatial quadratic velocity and experiment. The findings confirmed that the AM caused multi-frequency negative EM, while the overall bandgap width was substantially wider than that of conventional metamaterials. Due to the numerous vibration modes of the flexible metamaterial, the suggested flexible lightweight metamaterial sticker can generate several observable local resonance FVBGs in the low-frequency range. Significantly broadening the bandwidth of FVBGs can be achieved by varying the rubber cylinder radius and thickness, as well as by adjusting the lattice constant and flexible material plate thickness. Within the FVBGs, the proposed lightweight flexible metamaterial sticker shows a good vibration-suppression performance, when compared with the traditional damping structure or metamaterials.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fmats.2024.1364159</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fmats.2024.1364159</link>
        <title><![CDATA[Design of novel microstrip patch antenna for millimeter-wave B5G communications]]></title>
        <pubdate>2024-04-04T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Jun Jiat Tiang</author><author>Deema Mohammed Alsekait</author><author>Imran Khan</author><author>Pi-Chung Wang</author><author>Dag Øivind Madsen</author>
        <description><![CDATA[Introduction: The simplicity of integration and co-type features of microstrip antennas make them intriguing for a broad variety of applications, particularly with the growing usage of mmWave bands in wireless communications and the constant rise in data transfer in communication situations.Method: This paper proposes a novel design of micrstrip patch antenna for mmWave B5G communication. The main idea is to realize four-mode antenna the operates in four different frequencies. The geometry is rectangular patch whose resonance frequency is adjusted by varying the walls and pins of the structure.Results: Simulation results show that the proposed antenna design has improved fractional bandwidth and performance as compared with existing antennas.Discussion: The observed curve indicates that, in agreement with the modeling findings, there are four resonance spots in the operational frequency region of 2.5–3.4 GHz: 2.68 GHz, 2.9 GHz, 3.05 GHz, and 3.3 GHz, which correspond to TM1/2,0, TM3/2,0, and TMRS, respectively, and TM1/2,2 four resonant modes, within the frequency range, the observed antenna gain peak is around 9 dBi, which is consistent with the measured results.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fmats.2024.1361408</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fmats.2024.1361408</link>
        <title><![CDATA[Programmable mechanical metamaterials: basic concepts, types, construction strategies—a review]]></title>
        <pubdate>2024-03-20T00:00:00Z</pubdate>
        <category>Review</category>
        <author>Chenyang Liu</author><author>Xi Zhang</author><author>Jiahui Chang</author><author>You Lyu</author><author>Jianan Zhao</author><author>Song Qiu</author>
        <description><![CDATA[Metamaterials have been a hot topic over the past 2 decades, involving scientific research directions in materials, engineering, and physics. Among them, programmable mechanical metamaterials are an emerging class of metamaterials that offer intelligent programming and control of diverse mechanical properties, such as stiffness, damping, thermal expansion, and shape memory behavior. Meanwhile, it can be rationally designed to have specific geometric architectures and programming strategies in response to different types of external stimuli, such as temperature, electric and magnetic fields, and mechanical loads. These intelligent mechanical properties have a wide range of potential applications due to their uniqueness and controllability, including soft robotics, adaptive structures, and wearable devices. Thus, the programming strategies to achieve them are particularly critical. Combined with related programmable thinking concepts, this paper briefly reviews programming strategies for programmable mechanical metamaterials, including geometric, structural, and external driving force programming. Meanwhile, this paper presents the principles of programming strategies classified according to different programmable mechanical properties (e.g., programmable stiffness, deformation, multistability) and looks ahead to the challenges and opportunities for future research.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fmats.2024.1358912</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fmats.2024.1358912</link>
        <title><![CDATA[Impact of various heat treatment processes and welding speeds on the mechanical properties and microstructures of soft/hard composite joints]]></title>
        <pubdate>2024-02-23T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Yang Yu</author><author>Zhao Wang</author><author>Biao Chen</author><author>Shuchao Zhang</author><author>Jinliang Du</author>
        <description><![CDATA[There is a certain contradiction between the formability and strength of auto parts. In this work, the whole-process processing technology of hot stamping soft steel was designed, and 500 MPa grade mild steel (500HS) with uniform microstructure was prepared. To take into account the strength and formability of hot stamping soft steel, here, based on laser welding technology, 500 MPa grade soft steel, and 1500 MPa grade hard steel are benignly composited, and by adjusting the laser welding speed and heat treatment process, the loss of mechanical properties caused by the weld seam is eliminated. A soft/hard composite steel for automobiles with excellent strength, ductility and formability is obtained. To maintain excellent deformation resistance and bonding force of the weld, the heat-affected zone of 500HS retains part of bainite and pearlite, which is beneficial to the strain compatibility and stress partitioning with the microstructure of the base metal, and the hardness is low. After heat treatment, which helps to transfer the stress concentration effect to the 500HS base metal with strong energy absorption capacity, so that the clad steel has excellent comprehensive mechanical properties. This process is developed based on existing industrialized equipment and has broad application prospects.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fmats.2024.1378422</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fmats.2024.1378422</link>
        <title><![CDATA[Corrigendum: Design and performance evaluation of a novel metamaterial broadband THz filter for 6G applications]]></title>
        <pubdate>2024-02-08T00:00:00Z</pubdate>
        <category>Correction</category>
        <author>Ayman A. Althuwayb</author><author>Nasr Rashid</author><author>Osama I. Elhamrawy</author><author>Khaled Kaaniche</author><author>Imran Khan</author><author>Yung-Cheol Byun</author><author>Dag Øivind Madsen</author>
        <description></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fmats.2023.1342908</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fmats.2023.1342908</link>
        <title><![CDATA[Editorial: Acoustic and mechanical metamaterials for various applications - volume II]]></title>
        <pubdate>2023-11-29T00:00:00Z</pubdate>
        <category>Editorial</category>
        <author>Fuyin Ma</author>
        <description></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fmats.2023.1305793</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fmats.2023.1305793</link>
        <title><![CDATA[Design and performance evaluation of a novel broadband THz modulator based on graphene metamaterial for emerging applications]]></title>
        <pubdate>2023-11-21T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Jun Jiat Tiang</author><author>Naglaa F. Soliman</author><author>Imran Khan</author><author>Jaeyoung Choi</author><author>Hee Chan Chung</author><author>Dag Øivind Madsen</author>
        <description><![CDATA[Introduction: Metamaterials consist of periodic arrangements of artificial subwavelength units that possess electromagnetic properties not present in natural media. It has attracted more interest due to its ability to alter electromagnetic radiation in a flexible manner, which has resulted in the development of multiple radio frequency devices based on metamaterials. Metamaterials with the required frequency band for electric or magnetic resonance can be made using unit cell structure. The incident electromagnetic wave will enter the metamaterials and be kept there in the absence of reflection.Methods: This paper proposes a novel broadband THz absorber filter based on graphene for emerging applications. The proposed structure comprised of three parts. The top layer consists of graphene, the middle layer consists of dielectric and the bottom layer is made up of gold.Results: The proposed structure is experimentally designed and validated using the COMSOL simulator.Discussion: Simulation results show that the proposed absorber has better performance as compared with existing methods.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fmats.2023.1310326</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fmats.2023.1310326</link>
        <title><![CDATA[Editorial: Transformation optics and its frontier branches]]></title>
        <pubdate>2023-10-23T00:00:00Z</pubdate>
        <category>Editorial</category>
        <author>Fei Sun</author><author>Yichao Liu</author><author>Shuomin Zhong</author><author>Shuai Zhang</author>
        <description></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fmats.2023.1289250</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fmats.2023.1289250</link>
        <title><![CDATA[Metasurface-enabled electromagnetic illusion with generic algorithm]]></title>
        <pubdate>2023-10-03T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Rongrong Zhu</author><author>Tianhang Chen</author><author>Kai Wang</author><author>Hao Wu</author><author>Huan Lu</author>
        <description><![CDATA[Electromagnetic cloak or illusion, which can interfere with device detection and provide superior self-protection capabilities for animals or humans, has received much attention. The proposal of transformation optics provides a generalized strategy for realizing electromagnetic illusion. However, the complex parameter composition causes a substantial computational cost, which is not conducive to practical applications. To overcome these challenges, we report an intelligent illusory metasurface optimized by a genetic algorithm, which not only presents predefined illusory effects but also reduces the parameter space in physics. By designing a high-performance tunable metasurface, a high-fidelity inverse design is performed in simulation. Near-field and far field results show that the metasurface can generate virtual targets in different scenarios and realize electromagnetic illusion. This work is helpful in facilitating the practical application of electromagnetic illusion strategies.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fmats.2023.1245685</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fmats.2023.1245685</link>
        <title><![CDATA[Design and performance evaluation of a novel metamaterial broadband THz filter for 6G applications]]></title>
        <pubdate>2023-09-25T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Ayman A. Althuwayb</author><author>Nasr Rashid</author><author>Osama I. Elhamrawy</author><author>Khaled Kaaniche</author><author>Imran Khan</author><author>Yung-Cheol Byun</author><author>Dag Øivind Madsen</author>
        <description><![CDATA[Terahertz (THz) radiation, which has applications in the imaging of objects, non-destructive testing, satellite communication, medical diagnostics, and biosensing, has generated a great deal of attention due to its remarkable properties. This paper proposes a novel broadband filter for THz applications. The main idea is to overcome the insertion loss and bandwidth issues by modeling a frequency-domain finite difference method and guided-mode resonance (GMR). The optimal design scheme of the wideband pass filter based on the circular resonant ring is discussed by comparing the transmission parameters under various parameters. This scheme overcomes the restriction of the narrow passband bandwidth of the prior THz filters and achieves approximately 3 dB bandwidth of 0.54 THz. The proposed THz filter paper also has the advantages of a straightforward structure, low processing costs, and ease of conformal with other structures, and it can be used for stealth fighters, new communication technology, and precise instruments. In addition, when compared to existing models, the suggested filter offers higher 3 dB BW operation, increased transmittance, low insertion loss, and stable performance at various oblique angles.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fmats.2023.1273961</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fmats.2023.1273961</link>
        <title><![CDATA[A review on the mechanical metamaterials and their applications in the field of biomedical engineering]]></title>
        <pubdate>2023-09-20T00:00:00Z</pubdate>
        <category>Review</category>
        <author>Hao Wang</author><author>Yongtao Lyu</author><author>Sergei Bosiakov</author><author>Hanxing Zhu</author><author>Yuanfei Ren</author>
        <description><![CDATA[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. among which the mechanical metamaterials are widely used in the field of biomedical engineering. The mechanical metamaterials are the ones that possess special mechanical behaviors, e.g., lightweight, negative Poisson’s ratio, etc. In this paper, the commonly used mechanical metamaterials are reviewed and their applications in the field of biomedical engineering, especially in bone tissue engineering and vascular stent, are discussed. Finally, the future perspectives of this field are given.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fmats.2023.1212909</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fmats.2023.1212909</link>
        <title><![CDATA[Damage localization method using ultrasonic lamb waves and Wav2Vec2.0 neural network]]></title>
        <pubdate>2023-08-09T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Lubin Qian</author><author>Sihao Liu</author><author>Guopeng Fan</author><author>Xinlong Liu</author><author>Hui Zhang</author><author>Yaohua Mei</author><author>Yuhui Xing</author><author>Zhiqiang Wang</author>
        <description><![CDATA[In this paper, a Wav2Vec2.0 neural network based on an attention mechanism is proposed to locate defects in array ultrasonic testing signals. This method does not require knowledge of the a priori condition of the sample sound velocity or the feature extraction of ultrasonic scattering signals. First, an array piezoelectric ultrasonic testing system is used to detect a signal through hole defects at different positions in the plate structure. Then, three different neural networks—1D-CNN, Muti-Transformer, and Wav2Vec2.0—are used to locate the defects in the collected ultrasonic testing data. The performance of the network is verified with the data set collected through finite element simulation and the experimental system, and the identification accuracy and the calculation efficiency of different networks are compared and analyzed. To provide a solution for the poor balance of the experimental data set and the weak noise resistance of the simulation data set, a data set expansion method based on time domain transformation technology is proposed. The research results show that, the positioning accuracy of the Wav2Vec2.0 neural network proposed in this article is 98.46%, and the positioning accuracy is superior to Muti Transformer and ID-CNN.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fmats.2023.1229164</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fmats.2023.1229164</link>
        <title><![CDATA[Simultaneously focusing electromagnetic and acoustic waves by double-physical-fields null medium]]></title>
        <pubdate>2023-08-02T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Boyang Wu</author><author>Fei Sun</author><author>Yichao Liu</author><author>Xin Liu</author><author>Xiaodan Zhao</author><author>Hongming Fei</author><author>Yibiao Yang</author><author>Zhihui Chen</author><author>Shaowei Liang</author><author>Zheng Wang</author><author>Bingjie Wang</author>
        <description><![CDATA[A novel double-physical-fields lens that can simultaneously focus acoustic and electromagnetic waves into a given region is designed based on double-physical-fields null medium, which can be realized by metal plates with subwavelength separations/thicknesses and precisely designed lengths. Numerical simulations show the proposed double-physical-fields lens can create exactly the same focusing effect for both electromagnetic and acoustic waves, i.e., the same focal spot size and efficiency at the same focal length. Four typical lens with different output surfaces are studied, which shows different focusing characteristics, e.g., noodle-shaped focal spot, tiny focal spot, and capsule-shaped focal spot. With the help of the designed double-physical-fields lens, an additional degree of freedom for control can be provided by simultaneously focusing acoustic and electromagnetic waves, which may lead to wider range of applications than single-field focusing.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fmats.2023.1208510</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fmats.2023.1208510</link>
        <title><![CDATA[Research on mechanical properties and impact resistance of origami-based metamaterial for GIL]]></title>
        <pubdate>2023-06-23T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Wei Xu</author><author>Yinmao Huang</author><author>Haoran Li</author><author>Yan Luo</author><author>Yang Wu</author>
        <description><![CDATA[Gas insulated metal enclosed transmission line (GIL) is a high voltage, high current power transmission equipment, widely used in large hydropower stations, large-scale energy hubs and other occasions. Aiming at the shock environment that GIL may face, such as earthquake shock and water flow shock, a mirror folded mechanical metamaterial based on the Miura-ori patterned is proposed in this paper, and its mechanical responses and shock resistance performance were studied through the numerical simulation and experiment. The results showed that compared with the single-layer folded structure, the mirror connection mode increased the plastic hinge in the deformation process of the structure, causing the better energy absorption. Moreover, the parameters research indicated that reducing the plane angle and increasing the dihedral angle can improve the energy absorption. Most importantly, the structure can achieve more than 60% energy absorption under the impact load, showing a good buffer energy absorption effect. This paper can provide some significant reference and guidance for the impact resistance of the GIL in the practical engineering.]]></description>
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