Article
Physics, Multidisciplinary
Chinika Dangi, Roshan Lal
Summary: A nonlocal model has been proposed to study the vibration behavior of bi-directional functionally graded nanobeam, considering surface and size effects. The results show that the surface effect plays an important role in such material.
Article
Mathematics, Applied
Roshan Lal, Chinika Dangi
Summary: This article introduces a nonlocal model based on the Timoshenko beam theory for vibration response of bi-directional functionally graded moderately thick nanobeam under surface effect. The study considers surface and nonlocal effects using the Gurtin-Murdoch surface elasticity theory and Eringen's nonlocal theory, and numerical results are obtained using the differential quadrature method.
APPLIED MATHEMATICS AND COMPUTATION
(2021)
Article
Mechanics
Abbas Barati, Amin Hadi, Mohammad Zamani Nejad, Reza Noroozi
Summary: This article investigates the transverse vibrations of bi-directional functionally graded nanobeams subjected to a longitudinal magnetic field. The nonlocal elasticity theory and the generalized differential quadrature method are used to obtain the equations of motion and boundary conditions, and the effect of different parameters on vibration is studied.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Mechanics
Mohammad Gholami, Elnaz Zare, Ali Alibazi
Summary: This study presents a size-dependent Euler-Bernoulli beam model for analyzing the nonlinear free vibration of a bidirectional functionally graded nanobeam with immovable ends, based on nonlocal theory. By formulating the problem relative to the physical neutral surface, Hamilton's principle is used to derive the equations of motion and boundary conditions. The accuracy of the formulation is evaluated through comparing nonlinear vibration frequencies with frequencies from previous studies, and it is found that nonlinear vibration frequencies exceed linear frequencies for the same amplitude.
ARCHIVE OF APPLIED MECHANICS
(2021)
Article
Mechanics
Chinika Dangi, Roshan Lal, N. Sukavanam
Summary: A mathematical model for bi-directional functionally graded Euler-Bernoulli nanobeams has been developed, considering nonlocal strain gradient theory and Gurtin-Murdoch surface elasticity theory.
A parametric study shows that the surface effect has a significant impact on the frequencies of nanobeams, especially at lower thicknesses.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2021)
Article
Mechanics
Lu Wei, Hai Qing
Summary: The modified couple stress theory is applied to analyze the static bending, elastic buckling, and free vibration behaviors of circular/annular micmplates made of bi-directionally functionally graded materials. The numerical results show the effects of material length scale parameter, FG material indices, and inner-to-outer radius ratio on the bending deflection, buckling loads, and free vibration frequency.
COMPOSITE STRUCTURES
(2022)
Article
Mathematics, Applied
Pham Toan Thang, T. Nguyen-Thoi, Jaehong Lee
Summary: The main goal of this research paper is to model and analyze bidirectional functionally graded nanobeams using the Timoshenko beam theory and nonlocal strain gradient theory. The study focuses on understanding mechanical behavior, calculating important parameters, and formulating equilibrium and stability equations for a detailed investigation. Specific examples are presented to verify the proposed solution, and the influences of material properties and nonlocal parameter on critical buckling load and transverse deflection are examined.
APPLIED MATHEMATICS AND COMPUTATION
(2021)
Article
Computer Science, Interdisciplinary Applications
Xuping Zhu, Zhangxian Lu, Zhengliang Wang, Lixin Xue, Ali Ebrahimi-Mamaghani
Summary: In this study, the vibration and stability of magnetically embedded spinning axially functionally graded nanotubes conveying fluid were analyzed using the nonlocal strain gradient theory. The influence of material distribution type and size-dependent parameters on the stability of the system was investigated. The findings provide guidance for the modeling and design of nanofluidic systems.
ENGINEERING WITH COMPUTERS
(2022)
Article
Engineering, Civil
Quoc-Hoa Pham, Trung Thanh Tran, Phu-Cuong Nguyen
Summary: In this study, a new approach combining isogeometric analysis with the higher-order shear deformation theory and Monte Carlo simulation was used to investigate the uncertain vibration characteristics of bi-functionally graded sandwich nanoplates under dynamic loading. The obtained results show that the distribution characteristics of vibration in the BFGSW nanoplates are significantly dependent on the standard deviation of the input parameters.
THIN-WALLED STRUCTURES
(2023)
Article
Mechanics
Kalyan Boyina, Raghu Piska, Sundararajan Natarajan
Summary: A nonlocal strain gradient model is developed for the buckling analysis of functionally graded Euler-Bernoulli beam subjected to thermo-mechanical loads. The governing equations incorporate the effects of nonlocal and strain gradient parameters. Thermal properties over the cross section are graded using the power law. The proposed model compares well with the existing literature in the limiting sense of no nonlocal and gradient effects.
Article
Engineering, Civil
Nam Nguyen, Duc-Huynh Phan
Summary: Understanding nonlinear behavior in advanced engineering structures is crucial for analysis, design, and manufacturing processes. This paper focuses on exploring the nonlinear free vibrational characteristics of bi-directional functionally graded plates with internal pores under various conditions. An approximate numerical model is used to calculate the displacement field, and the nonlinearity in free vibration is assessed using an iterative scheme. Comprehensive parametric investigations are conducted to gain insight into the impact of various factors on the nonlinear free vibration characteristics of plate structures.
THIN-WALLED STRUCTURES
(2023)
Article
Acoustics
Xiaojun Huang, Liaojun Zhang, Renyu Ge
Summary: This study investigates the natural dynamic characteristics of bi-directional (2D) functionally graded material (FGM) beams using the differential quadrature method (DQM). The results provide insights into the natural frequencies and mode functions of 2D FGM beams, highlighting the effects of thickness ratio, grading indexes, and supported edges.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Mechanics
Chao Wang, Liangliang Ma, Yang Bu, Jie Zhao, Kang Hao Cheong
Summary: This study proposes an effective approach for the optimal material distribution design of bi-directional functionally graded plates (2D-FGPs) with complex shapes. By combining multi-patch isogeometric analysis and an improved multi-objective particle swarm optimization algorithm, it achieves a unified CAD/CAE optimization design of 2D-FGPs across multiple non-smooth boundaries.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Sundaramoorthy Rajasekaran, Hossein Bakhshi Khaniki, Mergen H. Ghayesh
Summary: This research paper investigates the characteristics of tapered Timoshenko bi-directional functionally graded sandwich curved elastic arches in thermo-mechanical environments using the differential quadrature element method. Different types of arches with non-uniform cross-section and BDFG properties are modeled, and the influence of temperature rise, physical properties variation and geometrical parameters on the static deformation, buckling load and free vibration characteristics is analyzed. The research also presents the mechanical behavior of sandwich arches under thermo-mechanical loadings.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2022)
Article
Mechanics
Yan Cao, Majid Khorami, Shahrizan Baharom, Hamid Assilzadeh, Mohammad Hassan Dindarloo
Summary: This paper investigates the free vibration of three dimensionally functionally graded (FG) nanoplates and nanoshells for the first time, considering the small scale effect due to nanostructures and the influence of nonlocal parameters on natural frequencies. The results presented in this study can serve as benchmarks for future mechanical analysis of three-dimensionally FG shell structures.
COMPOSITE STRUCTURES
(2021)
Article
Acoustics
Xiao-Dong Yang, Zhen Li, Wei Zhang, Tian-Zhi Yang, C. W. Lim
JOURNAL OF VIBRATION AND CONTROL
(2019)
Article
Nanoscience & Nanotechnology
Ya-Xin Zhen, Shi-Long Wen, Ye Tang
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2019)
Article
Materials Science, Multidisciplinary
Weikai Xu, Meng Zhang, Jinying Ning, Wei Wang, Tianzhi Yang
MATERIALS RESEARCH EXPRESS
(2019)
Article
Mechanics
Ye Tang, Shun Zhong, Tianzhi Yang, Qian Ding
INTERNATIONAL JOURNAL OF APPLIED MECHANICS
(2019)
Article
Engineering, Mechanical
Zhi-Sai Ma, Qian Ding, Ye Tang
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2020)
Article
Materials Science, Multidisciplinary
Xiaofei Lyu, Fei Chen, Qingquan Ren, Ye Tang, Qian Ding, Tianzhi Yang
ACTA MECHANICA SOLIDA SINICA
(2020)
Article
Mathematics
Ying Li, Ye Tang
Summary: This paper proposes an image feature extraction model based on convolution operation for intelligent graphic design using traditional graphics. Parametric testing and effectiveness research are conducted to evaluate the performance of the model, and the results further verify the effectiveness of the proposed method.
Article
Materials Science, Multidisciplinary
Tian Yang, Zibin Lin, Tianzhi Yang
Summary: This paper presents experimental evidence of a highly nonlocal waterborne acoustic metasurface (WAM) for controlling underwater sound with enhanced efficiency and robustness. The proposed device has potential applications in underwater signal communication and high-resolution ultrasonic imaging.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Physics, Applied
Xiaofei Lyu, Hongzhu Li, Mengxin He, Qian Ding, Tianzhi Yang
Summary: Weyl points in the elastic wave field have been investigated and realized in a synthetic 3D space using one-dimensional phononic crystals with acoustic black hole structures. The topological edge states and interface states have been directly observed, and the measured data are in good agreement with numerical predictions.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Tian Yang, Zibin Lin, Xuefeng Zhu, Tianzhi Yang
Summary: In this study, an experimental demonstration of an elastic focusing metasurface with a dual-coupled resonator for high-efficient energy harvesting is presented. By utilizing an optimized design with bridged coupling, a significantly enhanced efficiency is achieved compared to traditional methods.
PHYSICAL REVIEW APPLIED
(2022)
Article
Chemistry, Multidisciplinary
Jing-Ping Wang, Ren-Yu Ge, Ye Tang
Summary: The divergent instability and coupled flutter characteristics of axially moving beams made of functionally graded materials are studied in this paper using the interpolation matrix method. The material property of the beam changes smoothly and continuously along the thickness direction. The differential equation for the transverse vibration kinematics of axially moving FGM beams is derived using Hamilton's principle based on the Euler-Bernoulli beam theory. The effectiveness of the interpolation matrix method is illustrated by comparing the presented solutions with those in the literature. The results show that the divergence and flutter velocities of axially moving FGM beams decrease with increasing material gradient index, and there is a narrow stability region between the first static instability region (divergence) and the first dynamic instability region (first- and second-order coupled flutter).
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Analytical
Chunlai Yang, Yikai Yuan, Hai Wang, Ye Tang, Jingsong Gui
Summary: In this study, a vibration energy harvester based on a two-dimensional acoustic black hole (ABH) was proposed, which utilizes the wave energy focus effect of ABH to increase harvested power. The structure of ABH was designed and analyzed using numerical simulation, and optimal parameters such as power index, truncation thickness, cross-sectional length, and round table diameter were obtained. The quadratic velocity of the plate surface with ABH was determined to be 22.33 times higher than that of a flat plate, and PZT film was attached to the corresponding positions of the ABH structure and plate structure. Under the same excitation-vibration condition, the average output power of a PZT with an ABH structure was found to be higher than that of a flat plate.
Article
Mathematics
Ying Li, Ye Tang
Summary: This paper proposes a novel method for creating feature graphics using deep learning algorithms and a channel attention module. The method extracts image features through convolutional operations and obtains key point matrices through channel weighting calculations. It simplifies the complexity of image generation and improves efficiency.
Article
Physics, Applied
Shuanglong Liu, Fei Chen, Tian Yang, Robert G. Parker, Pai Wang, Tianzhi Yang
Summary: This article reports an easy-to-make, resonance-based mechanism for achieving negative rotational inertia. The device consists of a heavy inner core, a lightweight outer shell, and rubber connections. The authors theoretically predict and experimentally observe negative rotational inertia in the range of 100-230 Hz. They also investigate the relationship between the bandwidth of negative inertia and the bandgap in a chain of negative-inertia units, revealing a unique property and potential applications in metamaterial designs.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Mechanical
Yang Jin, Shuai Hou, Tianzhi Yang
Summary: This paper explores how to design an integrated system that ensures broadband vibration suppression performance while maximizing energy harvesting. By using a cascaded essentially nonlinear system, it is possible to simultaneously achieve vibration suppression and energy collection.
NONLINEAR DYNAMICS
(2021)
