Article
Mechanics
Zhicheng Yang, Ismail Barbaros, Saeid Sahmani, Abubakar Abdussalam Nuhu, Babak Safaei
Summary: In this study, the nonlocal stress and couple stress tensors are incorporated into the nonlinear stability analysis of functionally graded (FG) multilayer shallow micro/nano-arches under thermomechanical loading. The nanocomposite material of FG multilayer shallow micro/nano-arches is reinforced with graphene nanofillers. The effects of nonlocality and couple stress on the stability and load-bearing capacity of the arches are analyzed.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Engineering, Multidisciplinary
Qi Zhang, Shaofan Li, A-Man Zhang, Yuxiang Peng, Kun Zhou
Summary: The work presents a nonlocal and nonlinear structural mechanics theory and computational formulations for solving dynamic problems of stiffened shell structures, including dynamic fracture. A hybrid beam-shell geometrically exact stiffened shell model is proposed, coupling nonlocal geometrically exact beam and shell formulations. The proposed nonlocal stiffened shell theory is demonstrated to model crack growth in stiffened shell structures.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Mechanics
Fan Fan, Saeid Sahmani, Babak Safaei
Summary: This study investigates the size-dependent analysis of the geometrically nonlinear vibration response of micro/nano-plates made of porous functionally graded material (PFGM) with and without a central cutout, considering nonlocality and strain gradient size dependencies. It is found that the increase in nonlinear frequency due to the strain gradient size effect is greater than the reduction caused by nonlocality. Additionally, there is a specific length to thickness ratio value at which the nonlocal strain gradient frequency ratio becomes minimum, and this value increases with the porosity index of PFGM micro/nano-plates.
COMPOSITE STRUCTURES
(2021)
Article
Physics, Fluids & Plasmas
Qing Wang, Milivoj R. Belic, Dumitru Mihalache, Liangwei Zeng, Lingling Zhang, Ji Lin
Summary: This paper numerically investigates the propagation characteristics of Laguerre-Gaussian vortex beams in nonlocal nonlinear media. The results show that the behavior of the beams depends on the selection of beam parameters and can exhibit stable solitons, single-hump profiles, or vortex chaoticons. The properties of chaos and soliton-like behavior are determined by Lyapunov exponents and spatial decoherence, while the power and orbital angular momentum decay in propagation for unbounded beam states but are maintained well for chaoticons.
Article
Engineering, Multidisciplinary
Qingya Li, Di Wu, Wei Gao, David Hui
Summary: In recent years, there has been a strong trend towards portability, miniaturization, and integration in engineering applications. To explore the nonlinear dynamic stability behavior of nanoplates, the nonlocal strain gradient theory is used, which captures the size effect in a more general size-dependent continuum-based model. Four types of axial impact loading configurations are considered, and practical factors such as elastic foundation and damping are taken into account. The effects of size dependency, pulse load configuration, initial imperfection, elastic foundation, and damping ratio on the nonlinear dynamic buckling behavior of the organic solar cells are thoroughly investigated within this framework.
APPLIED MATHEMATICAL MODELLING
(2023)
Article
Mathematics, Applied
Maysam Naghinejad, Hamid Reza Ovesy
Summary: The viscoelastic buckling and nonlinear post-buckling behavior of nano-scaled beams were analyzed using the nonlocal integral elasticity theory. The study developed a finite element method and considered buckling related terms and viscoelastic effects. The results were compared with literature and the effects of nonlocal parameter, viscoelastic parameter, axial compressive load, and boundary conditions on the buckling and post-buckling behavior were investigated.
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2022)
Article
Optics
Adam Overvig, Andrea Alu
Summary: Metasurfaces have the potential to control optical wavefronts in a multifunctional way, thanks to recent advances in their frequency response control. By leveraging diffractive nonlocal metasurfaces, which use controlled geometric perturbations, ultrasharp optical responses can be achieved. This novel class of metasurfaces allows for both wavefront shaping and wavefront selectivity, offering new prospects for various applications.
LASER & PHOTONICS REVIEWS
(2022)
Article
Materials Science, Multidisciplinary
Babak Mousavi, Alireza Sadeghirad, Vahid Lotfi
Summary: This paper investigates the applicability of nonlinear fracture mechanics (NLFM) to describe the fracture behavior of graphene. The fracture properties and criteria of graphene have not been fully understood yet, and the current understanding is mostly limited to linear elastic fracture mechanics (LEFM) investigations.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Mechanics
Rosa Penna, Luciano Feo, Antonio Fortunato, Raimondo Luciano
Summary: The study investigates the size-dependent flexural nonlinear free vibrations of geometrically imperfect functionally graded nano-beams using the stress-driven nonlocal integral model (SDM). The Galerkin method is applied to derive a nonlinear ordinary differential equation, and the closed form analytical solution of the nonlinear natural flexural frequency for different boundary conditions is established using the Hamiltonian approach. The effects of nonlocal scale parameter and initial axial tension force on fundamental frequencies are examined and compared with results obtained from Eringen's nonlocal model. The study demonstrates that the nonlinear approach based on nonlocal stress model is effective in capturing the dynamical responses of nano-beams and is advantageous for the design and optimization of nano-scaled components in NEMS.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Saeed H. Moghtaderi, S. Ali Faghidian, Mohsen Asghari
Summary: This study examines the nonlinear vibration characteristics of elastic nano-bars with large vibration amplitudes and proposes an effective analytical method. By applying the nonlocal elasticity theory and strain gradient elasticity theory, the method considers the nano-scale effects and non-classical boundary conditions. This analytical approach can be used for optimized design of vibration-based nano-devices and addressing nonlinear dynamic phenomena.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Materials Science, Multidisciplinary
Zhi-Ping Dai, Yue-Jiao Wang, Yi-Cheng Wang, Zhen-Jun Yang, Zhao-Guang Pang
Summary: The evolution properties of controllable anomalous hollow beams in strongly nonlocal nonlinear medium are studied in this research. By changing initial parameters, the CAHB can represent different types of beams and show a rich variety of propagation characteristics. The transmission evolution properties, such as light intensity distribution and beam width, are mainly studied. The results show that the CAHB's light intensity pattern can remain unchanged, form solitons, or change periodically by choosing appropriate initial parameters. The beam width of CAHBs can be widened or compressed in different directions. The study also analyzes the role of various parameters in transmission evolution.
RESULTS IN PHYSICS
(2022)
Article
Engineering, Geological
Hesham Elhuni, Dipanjan Basu
Summary: The paper proposes a framework for analyzing the interaction between beams and nonlinear-poroelastic, layered continua under time-dependent loads. The framework combines Biot's theory of consolidation with a dynamic beam-continuum interaction model to derive the analysis. An iterative numerical algorithm is used to solve the coupled differential equations governing the motion of the beam-continuum system. The novelty of this framework is its ability to accurately account for nonlinear poroelastic soil-structure interaction within a dynamic time-integration framework using minimal computational resources.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2023)
Article
Computer Science, Interdisciplinary Applications
S. Ali Faghidian
Summary: The nonlocal modified gradient theory combines the frameworks of nonlocal integral elasticity and modified strain gradient theory, applied to a beam model. Nanoscopic effects are accommodated, and well-posedness of problems on bounded structural domains is confirmed. Analytical solutions and numerical illustrations are provided for flexural wave behavior in nano-sized beams, and wave propagation in carbon nanotubes is validated through molecular dynamics simulations.
JOURNAL OF COMPUTATIONAL DESIGN AND ENGINEERING
(2021)
Article
Multidisciplinary Sciences
Tongyu Li, Jiajun Wang, Wenjie Zhang, Xinhao Wang, Wenzhe Liu, Lei Shi, Jian Zi
Summary: A guideline for designing high-efficiency nonlocal reflection-type vortex generators based on temporal-coupled-mode theory is proposed. The conversion efficiency of vortex beams is limited by the ratio of radiative loss to intrinsic absorption in practical systems.
NATIONAL SCIENCE REVIEW
(2023)
Article
Engineering, Multidisciplinary
Yuanbin Wang, Weidong Zhu
Summary: The equations of motion for a hyperelastic beam under time-varying axial loading are derived using the extended Hamilton's principle, investigating the coupled transverse and longitudinal vibrations of the beam and exploring nonlinear vibrations in the subcritical buckling regime. The study determines complex nonlinear boundary conditions and critical buckling loads, with numerical investigations into the effects of material and geometric parameters on forced longitudinal vibration and steady harmonic shapes under harmonic axial loading. The analysis also includes the decoupling of equations of motion for nonlinear transverse vibration, studies of natural frequencies, two-to-one internal resonance, and determination of amplitude-frequency responses using methods like harmonic balance and pseudo arc length. The effects of external load, excitation amplitude, damping, and combined excitation amplitude and frequency on response amplitudes are also explored.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Materials Science, Multidisciplinary
Qi Lu, Yi-Ze Wang
Summary: This study investigates the head-on collision and transmission of opposite propagating solitary waves with nonreciprocal properties in different granular chains, leading to the production of transmitted and reflected solitary waves due to the discontinuity of two periodic granular systems. It is found that larger prestress results in an increase in the amplitude and velocity of solitary waves, causing nonreciprocal collision and transmission in granular mechanical metamaterials. This research is expected to aid in the design and application of elastic wave metamaterials and mechanical diodes with nonlinear solitary waves.
ACTA MECHANICA SOLIDA SINICA
(2022)
Article
Engineering, Aerospace
Hong-Yuan Bao, Yi-Ze Wang
Summary: Based on the scattering cancellation technique, a piezoelectric cloaking is designed to make the piezomagnetic cylinder invisible to transient elastic waves. The numerical method is used to demonstrate the cloaking behavior and examine the impact of piezoelectric parameters on invisibility and stress distribution.
Article
Mathematics, Applied
Zhenni Li, Yize Wang, Yuesheng Wang
Summary: This work investigates the three-dimensional propagation behaviors in the nonlinear phononic crystal and elastic wave metamaterial with initial stresses. Analytical solutions for the fundamental wave and second harmonic with the quasi-longitudinal and quasi-shear modes are derived. Band gaps with initial stresses are obtained based on the transfer and stiffness matrices using the Bloch theorem. The tunability of nonreciprocal transmission by initial stress is discussed.
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
(2022)
Article
Materials Science, Multidisciplinary
Zi-Hao Miao, Yi-Ze Wang
Summary: In this study, the symmetric transmission is disrupted in a system composed of a linear half-space and a nonlinear part with a corrugated interface. The interaction between nonlinear materials and elastic waves generates second harmonics, leading to non-symmetric transmission. Theoretical analysis and experiments confirm the existence of non-symmetric transmission, especially more pronounced when the incident wave is negative.
MECHANICS OF MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Zilong Shen, Yize Wang, Yunhao Li, Xing Zhang, Yuan Wang
Summary: Due to the limitations of simulation program with integrated circuit emphasis (SPICE) simulation tools, it is challenging to simulate the snapback behaviors under electrostatic discharge (ESD) stresses. In this brief, a new model using the voltage-controlled current source (VCCS) is proposed to investigate the avalanche breakdown effect, which improves the calculation of the avalanche multiplication factor M and enhances convergence characteristics. The versatility of the model is validated by its operations in various ESD protection circuits with MOS as the discharge device, and its scalability is demonstrated through applications in varied device sizes.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2022)
Article
Acoustics
Qi Lu, Yi-Ze Wang
Summary: This work investigates the solitary wave solutions of particle mechanical metamaterials with a mass-in-mass structure and local resonators. The Hertzian contact theory is employed to describe adjacent particles in a precompressed granular chain. The governing wave equations are decoupled, and the expressions of bright, dark, and peaked solitary waves are derived. It is found that both wave velocity and prestress have an impact on the propagation of solitary waves, and the amplitudes of bright and peaked solitary waves are smaller with larger prestress.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Engineering, Multidisciplinary
Zi-Hao Miao, Yi-Ze Wang
Summary: This study focuses on the nonreciprocal transmission of non-collinear mixing waves in a nonlinear elastic wave metamaterial. By breaking the traditional reciprocal transmission with asymmetric structure and material nonlinearity, the metamaterial can behave as a mechanical diode, allowing for the design of nonreciprocal elastic wave devices through nonlinear wave mixing methods.
JOURNAL OF ELASTICITY
(2022)
Article
Medicine, Research & Experimental
Jing Dai, Qi Li, Qinwei Zhou, Shen Zhang, Junru Chen, Yize Wang, Jing Guo, Yifan Gu, Fei Gong, Yueqiu Tan, Guangxiu Lu, Wei Zheng, Ge Lin
Summary: This study used whole-exome sequencing to identify the genetic causes of total fertilization failure (TFF) in male infertility. Homozygous variants in the novel gene IQCN were found in two individuals with abnormal acrosome structures. Knockout mice lacking the Iqcn gene showed similar phenotypes to humans with TFF. The study also revealed the role of IQCN in regulating microtubule nucleation during manchette assembly, and provided a genetic marker and therapeutic option for male TFF.
EMBO MOLECULAR MEDICINE
(2022)
Article
Environmental Sciences
Jili Sun, Lingdong Geng, Yize Wang
Summary: This paper proposes a hybrid classification model based on superpixel entropy discrimination in polarimetric synthetic aperture radar (PolSAR) image classification, achieving good results. By introducing information entropy to evaluate the quality of superpixel classification and using a complex-valued convolutional neural network to reclassify high-entropy superpixels, some problems in existing classification methods are solved.
Article
Biochemistry & Molecular Biology
Yize Wang, Hongguang Wang, Wen Ding, Xiaofei Zhao, Yongdong Li, Chunliang Liu
Summary: Ion transport molecules, especially potassium (K) ion channels, play important roles in physiological and pathological processes. A specific frequency terahertz electromagnetic wave (51.87THz) can significantly increase the K+ flux in the KcsA channel by binding K+ closely with the carbonyl oxygen atoms in the selectivity filter (SF) region. This finding provides insights into the efficient ion conduction mechanism in potassium channels.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Mechanics
Zi-Hao Miao, Yi-Ze Wang
Summary: This work breaks the symmetric transmission by using two half-spaces composed of nonlinear and linear solids and considering a corrugated interface. Additional irregularly reflected and transmitted waves are generated due to the interface corrugations, which can be controlled by the incident frequency and corrugation length. Both theoretical analysis and experimental results confirm the existence of in-plane non-symmetric transmission.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2023)
Article
Acoustics
Zhi-Hua He, Yi-Ze Wang, Yue-Sheng Wang
Summary: This paper presents the dynamic effective parameter and sound transmission properties of an elastic wave metamaterial with active feedback control. The study analyzes the acoustic-structure coupling of the metamaterial with resonators and orthogonal stiffeners, taking into account the effects of external mean flow. Different analytical methods are used to derive the effective mass density and sound transmission loss (STL) of the metamaterial. The results show that the effective mass density exhibits frequency-dependent properties and can be controlled by active feedback control. The numerical results demonstrate that the changes in transmission characteristics are consistent with the effective mass density properties of the uncoupled unit cell structure. Additionally, the effects of lattice constants, incident angles, and Mach number on the STL are discussed.
Article
Environmental Sciences
Yize Wang, Hiroshi Okochi, Manabu Igawa
Summary: Forest decline in mountainous regions may result from acid fog, ozone, or other pollutants. A study on Mt. Oyama in Japan from 1994 to 2019 showed a decrease in air pollutant concentration and an increase in pH values of wet deposition. The improvement in Japan's domestic atmospheric environment and control of transboundary pollution provide better conditions for mountain ecology free from acidic pollutants.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Chemistry, Multidisciplinary
Yize Wang, Hiroshi Okochi, Yuto Tani, Hiroshi Hayami, Yukiya Minami, Naoya Katsumi, Masaki Takeuchi, Atsuyuki Sorimachi, Yusuke Fujii, Mizuo Kajino, Kouji Adachi, Yasuhiro Ishihara, Yoko Iwamoto, Yasuhiro Niida
Summary: Microplastic pollution is widespread in most ecosystems, but little is known about their presence in high altitude clouds and their impact on cloud formation and climate change. In this study, microplastics in cloud water collected from the summits of Japanese mountains were analyzed. Nine types of microplastics were found, and they were fragmented with concentrations ranging from 6.7 to 13.9 pieces per liter. Microplastics with hydrophilic groups were abundant, suggesting their potential role as condensation nuclei for cloud ice and water. These findings indicate that high-altitude microplastics can influence cloud formation and potentially modify the climate.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Article
Construction & Building Technology
Siyu Han, Linsheng Huo, Yize Wang, Jing Zhou, Hongnan Li
Summary: This study proposes a rapid 3D reconstruction method based on images, which combines traditional techniques with an interactive graph cuts algorithm. By using this method, modeling efficiency can be improved and high modeling accuracy can be achieved, making it suitable for applications such as rapid assessment in emergency scenarios.
Article
Mechanics
E. Mubai, D. P. Mason
Summary: The two-dimensional turbulent thermal classical far wake is investigated in this study. The turbulence is described using the Boussinesq hypothesis for Reynolds stresses and Prandtl's mixing length model for eddy viscosity and eddy thermal conductivity. Two conservation laws are derived for the thermal boundary layer equations using the multiplier method, and two conserved quantities are obtained from the conserved vectors and boundary conditions. Lie point symmetry associated with the momentum and thermal conserved vectors is derived, showing that the momentum and thermal mixing lengths are proportional. An invariant solution is obtained numerically using a shooting method, and analytically when v = 0, kappa = 0.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2024)
Article
Mechanics
Daniel J. Arrigo, Travis C. Chism
Summary: This paper investigates the governing equations for plane stress deformations of isotropic incompressible hyperelastic materials. The authors previously discovered a linearization method for the plane strain case of the Varga material, and in this paper, they further demonstrate that the governing equations for the plane stress case can also be linearized.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2024)
Article
Mechanics
A. P. Chugainova, R. R. Polekhina
Summary: This article numerically investigates the conditions for the decay of a nonlinear wave into a system of waves traveling at different velocities in a viscoelastic weakly anisotropic medium. Solutions of a hyperbolic system of equations are studied in the region of nonuniqueness of parameters, where a solution to the Riemann problem can be constructed with both a single wave and a system of waves corresponding to the same initial data.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2024)
Article
Mechanics
Yu. N. Grigoriev, E. I. Kaptsov, S. V. Meleshko
Summary: This paper studies the mathematical properties of gasdynamics equations with thermochemical nonequilibrium and provides solutions for two different models. The results show that the solutions to the modified system of equations are physically consistent and can describe the effects of thermochemical nonequilibrium.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2024)
Article
Mechanics
Y. Hao, X. Y. Guo, Y. B. Fu
Summary: This paper investigates the nonlinear stochastic dynamic response of a three-degree-of-freedom(3-DOF) airfoil with high substructural nonlinearity under vertical turbulent disturbances. The effects of parameters such as the incoming velocity, turbulence scale and intensity on the stochastic dynamics behavior of the system are clarified.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2024)
Article
Mechanics
T. Flament, J. -F. Deu, A. Placzek, M. Balmaseda, D. -M. Tran
Summary: This paper focuses on the numerical computation of vibrations in geometrically nonlinear structures induced by aeroelastic coupling with fluid flow using reduced order models (ROM). The proposed ROM formulation utilizes projection on a basis of reduced dimension enhanced with dual modes, allowing for the accurate capture of dynamic characteristics and adaptation to unsteady aerodynamic loads. The limitations of the classical Implicit Condensation method are highlighted, while the ROM proposed overcomes these limitations and accurately captures the dynamics.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2024)
Article
Mechanics
Sidhartha Sankar Roy, Kishore Chandra Biswal
Summary: This study investigates the non-linear slosh dynamics of a sloped wall tank with a bottom-mounted object under seismic excitation. The potential flow theory is used to model the liquid domain using a mixed Eulerian-Lagrangian method. The study successfully quantifies the non-linear seismic response of the tank and the influence of the internal object on the hydrodynamic behavior. A parametric investigation is conducted by altering the object's height. Comparison with linear analysis justifies the necessity of non-linear analysis. The developed non-linear finite element model is found to be more effective and can be used in designing structure-coupled sloped wall TLDs.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2024)
Article
Mechanics
Kapil Dev, Om P. Suthar
Summary: This study presents stability analyses of thermosolutal convection in a Newtonian fluid-saturated Darcy porous layer under non-uniform inclined heating, considering the presence of the Soret effect. The results reveal the destabilizing effect of the solutal Darcy-Rayleigh number and Lewis number on the system's stability, while the Soret parameter has a non-monotonic effect depending on the horizontal Rayleigh number.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2024)
Article
Mechanics
Sandhya Maurya, Dia Zeidan, Manoj Pandey
Summary: This paper investigates a two-phase mass flow model governed by gravity, which involves solid particles and a viscous fluid. By utilizing the Lie symmetries admitted by the system, similarity solutions for the (2+1)-dimensional two-phase mass flow model are obtained. Through analytical solutions and numerical analysis, the physical behaviors of the resulting systems are successfully analyzed.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2024)
Article
Mechanics
Longfei Tan, Wei Zhang, Zixun Wang, Bowen Hou, Wei Sun
Summary: This study investigates the factors influencing the stiffness variation characteristics of a bolted joint during service, including macro deviation, micro-topography, and hysteresis characteristics. Through experiments and finite element modeling analysis, it is found that macro deviations and micro-topography on the bearing surface can cause irregular dynamic changes in the stiffness of the bolted joint, significantly affecting the dynamic/static response of the entire structure.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2024)
Article
Mechanics
Yu Xiao, Ze-Qi Lu, Nan Wu
Summary: This study investigates the characteristics of a magnet-engaged nonlinear piezoelectric energy generator stimulated by friction-induced vibration (FIV) in two distinct design configurations (in parallel and in-series). The results indicate that factors such as decay factor, dynamic friction coefficient, static friction coefficient, and normal force have an effect on the stability of the system and the generation of FIV. The in-parallel systems exhibit a higher charging power within the same operating range, while the in-series systems are more likely to excite FIV with a wider operating range.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2024)
