Article
Engineering, Mechanical
Yifei Xu, Zhigang Cao, Kemeng Cui, Yuanqiang Cai, Xingbo Pu
Summary: In this study, an original analytical formulation is proposed to investigate the interaction between seismic Love waves and a metasurface composed of tunable anti-plane resonators. The formulation utilizes the Green's function to describe the incident and scattered fields and derives a dispersion relation for hybrid Love waves using the effective medium approximation. The capabilities of the analytical formulation are demonstrated through modeling Love waves propagating across resonators, revealing complex phenomena and hybridization features.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Mechanics
Anil Kumar Vashishth, Umang Bareja
Summary: This study focuses on the propagation of Love waves in a composite structure consisting of piezoelectric layers and a functionally graded porous piezoelectric material (FGPPM) layer. The effects of porosity, wavenumber, and gradation on the phase velocity and group velocity of Love waves are investigated. The study also examines the variations of attenuation and electromechanical coupling factor with grading parameters and porosity. Numerical computations are conducted to analyze the mechanical and electrical displacement, stress, and attenuation. The findings provide valuable insights for improving the efficiency of surface acoustic wave (SAW) devices.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2023)
Article
Engineering, Civil
Shixuan Shao, Rongyu Xia, Zheng Li
Summary: This paper proposes a novel piezoelectric metasurface for simultaneously manipulating multi-mode guided waves in a plate, which has significant potential in the fields of guided wave manipulation and smart device design.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Aerospace
Rasool Moradi-Dastjerdi, Kamran Behdinan
Summary: This paper presents the dynamic behavior of cantilever lightweight substrate plates actuated by surface layers of piezoceramic, which has the potential to be used as an energy harvester. The passive substrate used is made of nanocomposite plates with embedded pores, where both nanofillers and pores are functionally graded distributed. Carbon nanotubes are employed for enhancement, and a modified Eshelby's approach is used to account for the CNT accumulating in some clusters. The study investigates the dynamic behavior of the proposed structure under a half wave of sinusoidal time-dependent pressure and explores the effects of porosity and CNT distribution.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Vanita Sharma, Satish Kumar
Summary: The piezoelectric and nonlocal effects on the propagation of surface waves in nanoscale smart structures are investigated, providing new insights for the designs and applications of nanoscale wave devices. The propagation of Bleustein-Gulyaev (BG) wave in a nonlocal piezoelectric (PE) layer overlying a nonlocal piezoelectric (PE) half-space is studied, taking into account the nanoscale size effect based on the nonlocal theory. The results show that the wave propagation is significantly affected by nanoscale size effects due to the presence of nonlocality in the media.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Geochemistry & Geophysics
Yutong Zhang, Haiming Zhang
Summary: This paper reports on the synthesis of Rayleigh and Love waves in horizontally double-layered elastic half-space and analyzes their behaviors. The results show that the higher-order modes of Rayleigh waves behave differently from the fundamental mode, while different modes of Love waves exhibit similar patterns.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Acoustics
Dezhi Li, Chunli Zhang, Shufang Zhang, Huiming Wang, Weiqiu Chen, Chuanzeng Zhang
Summary: Introduces the characteristics and applications of terahertz elastic waves in piezoelectric semiconductor structures. Three rod models are presented to analyze the propagation of elastic longitudinal waves, and the effects of piezoelectricity and semiconductor properties on dispersion behavior are investigated. The results provide theoretical foundations for the design of terahertz elastic wave-based devices.
Article
Mechanics
Fangming Lei, Zhengxi Chen, Chunlong Gu, Liansheng Ma, Yuanwen Gao
Summary: This article investigates the propagation characteristics of Love waves in a layered structure composed of a piezomagnetic layer attached to an elastic substrate exposed to a magnetic field and compressive stress. The effective constants of the piezomagnetic material, including elastic, piezomagnetic, and magnetic permeability, can be influenced by the magnetic field and compressive stress. The effects of the magnetic field and compressive stress on the Love wave's phase velocity, group velocity, mode shape, and magnetic potential are discussed in detail. The findings reveal an increase in the number of modes with the intensity of the magnetic field, while the tendency is reversed when applying compressive stress. Additionally, the group velocity decreases but the surface displacement of the piezomagnetic layer increases with the intensity of the magnetic field. The presented findings have practical significance for improving the performance of surface acoustic wave (SAW) devices.
Article
Nanoscience & Nanotechnology
Shi-Wang Fan, Wen-Qi Wang, Jinxi Liu, Xu Liao, Jingzhe Zhang, Yue-Sheng Wang
Summary: This study proposes a single-layer lossless metasurface for adjusting the asymmetric transmission of flexural waves. The design allows for efficient symmetric and asymmetric transmissions without the need for additional active modules or passively multilayered designs, and demonstrates a high contrast ratio of transmitted energy within a wide-angle range.
Article
Chemistry, Physical
Min-Zhang Sun, Ling-Shan Lyu, Qing-Chuan Zheng
Summary: In this study, dextromethorphan (DM) was chosen as the probe to investigate the mechanism of substrate inhibition of CYP2D6. Through molecular dynamics simulations and quantum mechanical calculations, it was found that multiple substrate binding can lead to substrate inhibition by reducing the stability of CYP2D6 binding DM and increasing the reactive activation energy of the rate-determining step. The identification of key residues and the understanding of the inhibition mechanism would contribute to the knowledge of drug-drug interactions in the cytochrome P450 superfamily.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Review
Mechanics
Cherif Othmani, He Zhang, Chaofeng Lue, Yan Qing Wang, Ali Reza Kamali
Summary: The growing usage of elastic, piezoelectric and magneto-electro-elastic composites has led to the development of new numerical methods for predicting dynamic responses. Orthogonal polynomial expansions are suitable for predicting acoustic wave dispersion curves, but may not be effective for structures with significant differences in constituent properties.
COMPOSITE STRUCTURES
(2022)
Article
Physics, Applied
Xiaotian Xu, Michael Newns, Mark Oxborrow
Summary: This paper presents a method for simulating coupled electromagnetic and mechanical vibrations on arbitrarily shaped piezoelectric structures. The method is based on weak forms and can be implemented in any finite-element-method software, allowing accurate simulation of the flow of electromagnetic energy inside and around structures containing piezoelectric materials.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Engineering, Civil
Zheng Wu, Rongyu Xia, Jianlin Yi, Zheng Li
Summary: In this paper, a tunable topological piezoelectric beam is designed by adjusting shunting inductances. Multiple topologically protected interface modes (TPIMs) are obtained and the robustness of TPIMs is verified. A novel topologically protected demultiplexer is also designed for the spatial separation of flexural waves.
ENGINEERING STRUCTURES
(2023)
Article
Mathematics, Interdisciplinary Applications
Yanhui Zhang, Qiang Gao
Summary: This study introduces a robust method for accurately computing dispersion curves of surface waves in an anisotropic semi-infinite periodically layered structure, utilizing properties of the symplectic transfer matrix, Wittrick-Williams algorithm, and precise integration method. The approach is efficient, accurate, and numerically stable, applicable to a wide range of surface wave problems with various anisotropic materials and layer configurations.
COMPUTATIONAL MECHANICS
(2021)
Article
Multidisciplinary Sciences
Xingbo Pu, Antonio Palermo, Alessandro Marzani
Summary: The analytical formulation presented in this study models the propagation of elastic waves in a half-space with an array of thin plates. It computes the interaction between incident waves and scattered fields induced by plate motion, using a multiple scattering formalism to handle arbitrarily arranged plates.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)