Article
Mathematics, Applied
E. J. P. Miranda, S. F. Rodrigues, C. Aranas, J. M. C. Dos Santos
Summary: The study presents new formulations for analyzing the complex dispersion relation of flexural waves in a metamaterial Mindlin-Reissner thick plate with multiple periodic resonators, using the PWE and EPWE methods. These formulations provide more accurate results at higher frequencies compared to traditional thin plate theories. Multiple periodic resonators with multiple degrees of freedom attached to metamaterial plates broaden the applications for wave attenuation in high frequencies.
JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS
(2022)
Article
Engineering, Civil
Ran Deng, Jun-De Yang, Yuan Gao, Yu-Hang Wang, Qi-Qi Li
Summary: This paper presents an experimental study on the double-corrugated steel plate under cyclic in-plane shear loading. By analyzing the effects of important parameters, the mechanism of the double-corrugated steel plate under pure shear loads was revealed. The results showed that the shear resistance of the double-corrugated plate was higher than that of the single-corrugated plate with the same steel volume, and increasing the corrugation height improved the shear buckling load and energy dissipation capacity.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Ran Deng, Jun-De Yang, Yu-Hang Wang, Qi-Qi Li, Zhou Yu, Qi-Wen Shen, Yang Yang
Summary: The double-corrugated steel plate (DCSP) is a new type of structural member with better stability and higher shear resistance than conventional single-corrugated steel plate (SCSP). This paper presents a study on the shear buckling and ultimate strength of DCSP. Theoretical studies, numerical simulations, and parameter analyses were conducted to determine the buckling strength and ultimate shear strength of DCSP.
Article
Crystallography
Jingxuan Zhou, Jie Zhang, Jiahui Chang, Zheng-Yang Li, Dongjia Yan
Summary: Phononic crystals and metamaterials possess topologically protected surface states, which can guide elastic waves without scattering or energy losses. In the field of acoustics, topological insulators show promise in designing efficient and robust acoustic wave guides. This study proposes a novel design of hexagonal metamaterial plates that can generate topologically protected edge waves through active control. The numerical examples demonstrate the robustness and efficiency of the proposed design.
Article
Physics, Applied
Renan L. Thomes, Danilo Beli, Christopher Sugino, Alper Erturk, Carlos De Marqui Junior
Summary: In this work, the concept of space-time wave localization is experimentally demonstrated using programmable defects. The dynamic properties of local resonators in an electromechanical metamaterial are controlled digitally to modulate a trivial point defect in space and time. The results show gradual transfer and localization of vibration energy over subsequent unit cells based on the defect position. The practical realization of space-time wave localization using programmable defects in elastic metamaterials may enable innovative solutions for information transmission, multiplexing and demultiplexing, sensing, and coding.
PHYSICAL REVIEW APPLIED
(2023)
Article
Mechanics
Sajad Karampour, Esmaeal Ghavanloo, S. Ahmad Fazelzadeh
Summary: This paper investigates the in-plane vibration characteristics of square metamaterial plates made of coated spherical particles embedded in a matrix. The effective material properties of the plates are obtained using a homogenization method. The governing equations of in-plane vibration are derived and solved analytically. The proposed formulations are verified using finite element method software.
Article
Mechanics
Mohamed Mkaoir, Hamdi Ezzin, Hassiba Ketata, Anouar Njeh
Summary: The transmission characteristics of piezoelectric/piezomagnetic phononic composite laminates with and without a defect layer were predicted using plane wave expansion and stiffness matrix methods. Two band gaps were observed in the energy transmission and reflection spectrums. The effect of epoxy layer thickness on transmission characteristics was also discussed. In addition, a passband can be produced and controlled within the band gap by inserting a defect layer. The effect of magnetoelectric and piezoelectric constants on transmission coefficient was further studied.
ARCHIVE OF APPLIED MECHANICS
(2023)
Article
Materials Science, Multidisciplinary
Pengchong Zhang, Chengzhi Qi, Xu Sun, Hongyuan Fang, Yesheng Huang
Summary: This study investigates the transverse bending behaviors of in-plane bidirectional functionally graded piezoelectric material plates using the scaled boundary finite element method and precise integration method. The proposed method allows for exploring the structural characteristics of the plates with arbitrary mathematical functions for the material coefficients. The study provides insights into the effects of geometrical shapes, gradient functions, loadings, and thickness-to-span ratios on the static flexure of FGPM plates.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Acoustics
Qiang Yi, Caiyou Zhao, Ping Wang
Summary: The study utilizes the Floquet transform method and supercell technology to analyze defect states and the propagation characteristics of elastic waves in periodic track structures. The presence of defects disrupts the periodicity of the structure, leading to the formation of multiple defect states and enhancing vibration in neighboring structures.
JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL
(2022)
Article
Construction & Building Technology
Jiangliang Song, Wei Wang, Sanqing Su, Bingjie Wang, Yu Li, Zheng Lu
Summary: The interfacial bond-slip behavior of CSRC composite structures is influenced by factors such as concrete strength, thickness of concrete protective layer, stirrup ratio, and embedment length of corrugated steel plate. Different parts of the corrugated steel plate contribute differently to the bond strength.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Energy & Fuels
Mengchao Du, Rui Jia, Xing Li, Xinhe Zheng, Zhibo Gao, Jiawang Chen, Peng Qiu, Heng Liu, Jin Yang, Delin Kong
Summary: The performance of tunnel oxide passivating contacts (TOPCon) solar cells relies heavily on the silicon oxide layer and poly-Si layer, with the band gap of poly-Si being influenced by the crystallization rates and doping of elements such as germanium and carbon. The appropriate band gap plays a crucial role in the efficiency of TOPCon solar cells, and the internal defects in poly-Si also greatly affect their performance.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Materials Science, Multidisciplinary
Yu Shen, Pengchong Zhang, Wei He, Man Xu, Qiuyu Duan
Summary: Using the scaled boundary finite element method, analytical precise integration solutions for the transverse free vibration responses of functionally graded piezoelectric composite plates are provided. The method allows exploration of vibration behaviors for plates with various geometrical shapes and boundary constraints, while reducing computational expenses and improving efficiency.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Electrical & Electronic
Dongquan Sun, Xiang Chen, Li-Xin Guo, Wanzhao Cui, Jing-Ya Deng
Summary: This article introduces a new electromagnetic band gap (EBG) structure based on soft and hard surfaces for gap waveguide (GW) technology. Compared to traditional EBG structures, the new structure offers significantly improved structural strength and tunable stopband performance, making it suitable for high-frequency applications.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2021)
Article
Physics, Condensed Matter
Wen-Chao Bai, Bai-Hui Li, Ben-Hu Zhou, Ding Zhao, Zhong-Jian Lan, Han Zhang, Han-Zhuang Zhang, Lin Yuan
Summary: The paper discusses the mechanism of the influence on electromagnetic wave transmission properties in piezoelectric photonic crystal (PPC) based on the structure of piezoelectric superlattice, finding that the piezoelectric effect can impact the transmission of EM waves by altering the dielectric properties of the PPC. Compared with traditional photonic crystals, PPC exhibits total reflection and zero refractive indexes in the low frequency region, with higher frequency positions and wider band gaps in the high frequency region.
SOLID STATE COMMUNICATIONS
(2021)
Article
Engineering, Mechanical
Zhuangzhuang He, Gongye Zhang, Xin Chen, Yu Cong, Shuitao Gu, Jun Hong
Summary: The localization of elastic wave at defect in phononic crystals has been studied for designing piezoelectric energy harvesting devices. A modified couple stress theory and a mixed finite element method were used to develop a new interface to capture the microstructure-dependent size effect in simulation. Numerical results show that considering size effect, the frequencies of bandgap and defect bands increase with decreasing model size compared to classical theory. Moreover, size reduction affects the stiffness ratio and thus the displacement amplitude, output voltage and power of the PEH device.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Yi Yuan, Jian Li, Ronghao Bao, Weiqiu Chen
Summary: In this paper, a double-layer phononic crystal beam is constructed using shape memory alloy springs, electromagnets, ordinary springs, and two metal beams. The electromagnets can be controlled to be in contact or separated by means of temperature and electric current. The study investigates the influence of different parameters on the bandgap properties and shows that temperature, electric current, lattice constant, and shape memory alloy spring stiffness have significant effects on the bandgaps, while ordinary spring stiffness and magnetic force have more localized modifications. The designed structure has the potential to actively control low-frequency noise reduction.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Yuting Guo, Chunli Zhang, Weiqiu Chen, Jiashi Yang
Summary: The study investigates the torsion of a composite rod consisting of a nonpiezoelectric semiconductor core coated with a piezoelectric dielectric shell. By establishing a one-dimensional model based on the macroscopic theory of piezoelectric semiconductors, an analytical solution is obtained, which explicitly demonstrates that the mobile charges in the rod redistribute axially under torsion. Consequently, the composite rod exhibits axial piezotronic coupling, suggesting potential for new piezotronic devices operating with torsion in addition to the existing devices based on beam extension and bending.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Beibei Xu, Jiao Wang, Weiqiu Chen, Bin Liu
Summary: This paper discusses the applicability of dynamic homogenization models in certain dynamic phenomena and investigates various phenomena in heterogeneous materials, such as supersonic propagation and the evolution of energy distribution. The findings pose challenges to the establishment of dynamic homogenization models.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Zhen Yang, Zhicheng Zhang, Chengbin Liu, Cunfa Gao, Weiqiu Chen, Chunli Zhang
Summary: This article investigates the electromechanical coupling behaviors of a hollow piezoelectric semiconductor (PS) composite cylinder and presents analytical solutions for different boundary conditions. The effects of geometric parameters and interface bonding condition on the multifield coupling responses and piezotronic effects are discussed.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Ocean
Shuang Zhao, Kuihua Wang, Juntao Wu, Weiqiu Chen, Yuan Tu
Summary: This study investigates the vertical bearing behaviors of flexible batter pile groups in sand. Model tests and finite-element analysis are conducted to study the effects of batter angle on vertical bearing capacities and internal force distributions. A design method is proposed for predicting the bearing ratios of batter pile groups.
MARINE GEORESOURCES & GEOTECHNOLOGY
(2023)
Article
Engineering, Mechanical
Kecheng Li, Guodong Zhuo, Yinnan Zhang, Congshan Liu, Weiqiu Chen, Chaofeng Lu
Summary: This study systematically reveals the phenomenon of hypergravitational Rayleigh-Taylor instability in solids and investigates the effect of centrifugal hypergravity on hydrogel plates. The experiments show that centrifugal hypergravity enhances the gravitational potential and induces instabilities in thinner, lighter, and stiffer hydrogel plates.
EXTREME MECHANICS LETTERS
(2022)
Review
Materials Science, Multidisciplinary
Zinan Zhao, Jun Zhu, Weiqiu Chen
Summary: This article reviews recent advances in understanding the size-dependent dynamic responses of piezoelectric nanostructures from the viewpoint of modified continuum mechanics. It pays particular attention to the abilities of advanced theories of piezoelectricity, such as gradient piezoelectricity, surface piezoelectricity, and nonlocal piezoelectricity, to predict unconventional vibration and wave characteristics in piezoelectric structures and devices at the nanoscale.
INTERNATIONAL JOURNAL OF SMART AND NANO MATERIALS
(2022)
Article
Mechanics
Jiaqing Jiang, Yun Wang, Weiqiu Chen, Rongqiao Xu
Summary: This paper proposes a two-dimensional analytical model for composite beams using the equivalent transformation of cross section. The state equations are derived based on the mixed variational principle and solved using the differential quadrature method. The method allows for convenient handling of transfer characteristics at the interlayer interfaces of composite beams and can serve as benchmarks for various one-dimensional beam theories.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Mechanical
Zhicheng Zhang, Chao Liang, Dejuan Kong, Zhengguang Xiao, Chunli Zhang, Weiqiu Chen
Summary: This study investigates the dynamic buckling and free bending vibration of an axially compressed piezoelectric semiconductor (PS) rod at the nanoscale, and analyzes the effects of surface effect on the critical dynamic buckling loads and damped resonance frequencies. Furthermore, the influences of axial compressive force and initial electron concentration on the effective damping ratio of the vibrating PS rod are studied.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Review
Engineering, Mechanical
Zinan Zhao, Yingjie Chen, Xueyan Hu, Ronghao Bao, Bin Wu, Weiqiu Chen
Summary: This paper reviews the mechanics of dielectric elastomers (DEs), including their dynamic responses, nonlinear electroelasticity, and periodic structures. The research results provide design and solution approaches, and discuss the underlying physics. It offers a useful guide for future studies.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Mechanical
Guozhan Xia, Wei Hong, Weiqiu Chen
Summary: In this paper, a physical model of a layer-substrate system penetrated by a rigid indenter was established to interpret the indentation test of advanced materials. The indentation of a pre-deformed compressible soft electroactive (SEA) layer on an elastic substrate was formulated as a Fredholm integral equation of the second kind and solved using a customized finite-difference scheme. The modified JKR model was used to incorporate surface adhesion for the layer-substrate system. The effects of adhesion and substrate on the indentation responses were investigated for a neo-Hookean ideal dielectric elastomer.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Computer Science, Interdisciplinary Applications
Zonghao Li, Xueyan Hu, Weiqiu Chen
Summary: Topology optimization is a powerful structural design method, but the optimal topologies obtained by the traditional density-based method are difficult to manufacture. The Moving Morphable Components (MMC) approach has been introduced to bridge the gap between design and manufacture. However, the lack of geometric arbitrariness in previous studies remains unsatisfactory.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2023)
Article
Engineering, Mechanical
Hang Hang Xu, Hui Chen Luo, Xue Gang Zhang, Wei Jiang, Xing Chi Teng, Wei Qiu Chen, Jie Yang, Yi Min Xie, Xin Ren
Summary: Auxetic materials have been extensively studied due to their unique mechanical properties and deformation modes. However, their practical engineering applications are limited by their low stiffness. This study combines re-entrant aluminum honeycomb with aluminum foam to enhance the stiffness of auxetic materials. Experimental and numerical investigations on the mechanical properties and deformation modes are conducted, along with the analysis of the effects of geometrical parameters. The proposed auxetic composite structures show promising applications in vehicle engineering, protective engineering, and aerospace engineering due to their superior performance.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Multidisciplinary
Z. Jiao, T. Heblekar, G. Wang, R. Xu, W. Chen, J. N. Reddy
Summary: The dual mesh control domain method (DMCDM) proposed by Reddy combines the advantages of the finite element method (interpolation of variables) and the finite volume method (satisfaction of the global form of the governing equations). This study extends the DMCDM for analyzing plane elasticity problems on non-rectangular domains meshed with arbitrarily shaped elements. The results show that the DMCDM exhibits excellent convergence and accuracy while requiring less computational cost when compared with the finite element method (FEM).
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Engineering, Mechanical
Wenhui Shen, Zihan Tang, Xuwei Wu, Liang Pan, Yuan Cheng, Bo Huo, Jizhou Song, Weiqiu Chen, Baohua Ji, Dechang Li
Summary: This study constructed an atomistic silk protein network model and investigated the structure evolution and stress distribution of silk protein under external loading. The study found that a pre-stretching treatment during the spinning process can improve the strength of silk protein by enhancing the properties of the silk protein network.
ACTA MECHANICA SINICA
(2022)
