Article
Mechanics
Ye Tang, Guo Wang, Taolin Ren, Qian Ding, Tianzhi Yang
Summary: The article introduces the use of three-directional functionally graded materials to fabricate slender beams to resist 3D loads and study nonlinear mechanics, and explores the effects of physical parameters on nonlinear mechanical behaviors through numerical examples.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Mechanical
Ye Tang, Tao Wang, Zhi-Sai Ma, Tianzhi Yang
Summary: A novel magneto-electro-elastic model of bi-directional functionally graded materials beams is developed to investigate nonlinear dynamics, showing that asymmetric modes induced by 2D FGMs significantly impact nonlinear responses. The influences of material distributions, length-thickness ratio, electric voltage, magnetic potential, and boundary conditions on nonlinear resonant frequency and response amplitude are discussed, highlighting the potential for accurate design of multi-ferroic composite structures through adjustments in material properties.
NONLINEAR DYNAMICS
(2021)
Article
Materials Science, Multidisciplinary
Kushan Prasad Verma, Dipak Kumar Maiti
Summary: This paper investigates the geometrically nonlinear structural responses of ceramic-metal functionally graded shell panels under mechanical and thermal shocks. The study reveals that including geometric nonlinearity significantly affects the responses of the shell panel structures when the loading direction and the gradation direction are reversed.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
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
Engineering, Mechanical
Mei Liu, Dengqing Cao, Xiaoyun Zhang, Jin Wei, Dongfang Zhu
Summary: The paper aims to develop an equivalent nonlinear beam model for forced vibration analysis of the nonlinear beamlike truss, introducing geometric nonlinearity to accurately capture the nonlinear dynamic response using the first four order modes. The efficiency and accuracy of the model are demonstrated through comparisons with finite element simulations, showing good agreements and identifying periodic motions. Additionally, the model shows significant computational cost savings compared to full-scale finite element models.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Mechanics
Vu X. Nguyen, Khoa Tan Nguyen, Son Thai
Summary: The main aim of this study is to develop a numerical model for investigating the large deflection response of curved functionally graded beams using Isogeometric Analysis. An exact three-dimensional beam theory is employed to model the spatial behavior of the beams, and the C-1-continuity requirement of interpolation functions is efficiently handled by adopting the Isogeometric Analysis approach. The proposed approach is validated through benchmark test cases and numerical examples that study the influence of material variations on the behavior of curved functionally graded beams under different loading conditions.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2022)
Article
Mechanics
Ahmad Reshad Noori, Timucin Alp Aslan, Beytullah Temel
Summary: This study introduces an efficient numerical method to solve the dynamic responses of functionally graded porous beams, considering non-uniform distributions of elastic modulus and mass density, material constitutive law of open-cell metal foam, and the influence of damping. The canonical equations of motion for FGP beams are derived for the first time and solved numerically using the Complementary Functions Method, with results transformed back to the time domain. The influence of porosity constants, symmetric and asymmetric porosity distributions, and damping ratios on the dynamic response of FG porous beams is examined through detailed parametric studies.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Civil
Linh T. M. Phi, Tan -Tien Nguyen, Jaehong Lee
Summary: This study investigates the free vibration of thin-walled beams with functionally graded materials (FGMs) and analyzes the natural frequencies and vibrational modes under different material distributions. The proposed theory is validated through numerical comparison with existing literature results, and the effects of gradual law and volume fraction of ceramic on natural frequencies are also examined.
THIN-WALLED STRUCTURES
(2021)
Article
Mathematics, Applied
M. Abid, S. Koubaa, A. Abdelkefi, A. Frikha, F. Dammak
Summary: A computational model is developed to analyze the geometrically nonlinear response of porous functionally graded shells, showing significant effects of porosity distribution and material gradation on displacement and shear stress of complex structures.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2021)
Article
Mechanics
Prashik Malhari Ramteke, Vikash Kumar, Nitin Sharma, Subrata Kumar Panda
Summary: The present article numerically estimates the nonlinear eigenfrequency responses of a functionally graded material panel in a thermal environment using the finite element method. The material properties and porosity distributions are considered, and the stability and accuracy of the proposed model are checked through convergence and validation. Several numerical examples are solved to demonstrate the efficacy of the proposed model.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2022)
Article
Mechanics
M. M. Keleshteri, J. Jelovica
Summary: This study investigates the nonlinear free and forced vibration behavior of functionally graded porous beams considering high-order bidirectional porosity distributions. The results show that the proposed porosity distributions are more effective than the conventional ones, and beams with more voids at the center have the lowest amplitude of vibration.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Civil
Yingzhi Zhao, Huaiping Tang, Bo Zhang, Zedong Lai, Huijian Chen
Summary: This study investigates the effect of hygrothermal loads on the nonlinear free vibrations of a porous bi-directional functionally graded Timoshenko beam with a Winkler-Pasternak foundation. The results show that the axial functionally graded index significantly affects the vibration mode shapes, while the thickness-wise functionally graded index has little influence. The geometric nonlinearity has a considerable impact on the critical temperature rise value, and the influence of temperature and moisture on the nonlinear fundamental frequency is influenced by the functionally graded index and the maximum deflection value.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Materials Science, Multidisciplinary
Kemal Arslan, Recep Gunes, M. Kemal Apalak, J. N. Reddy
Summary: The geometrically nonlinear and elastoplastic behavior of a circular FGM plate subjected to mechanical loading-unloading conditions is investigated using a three-dimensional finite element method. The study examines the influences of nonlinearity, load parameter, thickness-to-radius ratio, and material composition on the mechanical behavior of the FGM plate. The results show that a combination of geometrical and material nonlinearities significantly affects the nonlinear mechanical behavior of the FGM plate under plastic deformation.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Mechanics
Ying Li, Ye Tang
Summary: This study proposes the application of three-directional functional graded materials (3D FGMs) for advanced devices in aerospace, marine engineering, and nuclear fields. The research establishes the nonlinear governing equation for structures and presents an analytical solution for nonlinear bending response using the iterative technique. It reveals the impact of 3D FGMs and hygro-thermal properties on nonlinear behavior.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Tan-Tien Nguyen, Ngoc-Linh Nguyen, Jaehong Lee, Quoc-Hung Nguyen
Summary: The paper introduces an analysis of thin-walled functionally graded straight and curved beams for general non-uniform polygonal cross-sections in vibration problems, utilizing a higher order beam theory and beam frame modal approach. The study considers the effects of geometric parameters and material anisotropy, enabling analytical modeling for further extension, with numerical verification and examples based on benchmark problems and finite element software simulation. The analysis can be applied to general closed cross-section beams with arbitrary curvatures, with materials properties assumed to be graded across the wall thickness following a predefined shape function.
COMPOSITE STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Mir Abbas Roudbari, Yingyan Zhang, Yihe Zhang, Sritawat Kitipornchai, Jie Yang
Summary: This paper presents size-dependent continuum mechanics models for the nonlinear band gap characteristics of a piezo-electro-magnetic phononic crystal micro and nanobeam under different control methods. The effects of size-dependent factors on the band gap properties are analyzed using various models and methods. The study finds that all band gap frequencies can be controlled by the applied physical fields and elastic medium.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Computer Science, Interdisciplinary Applications
Shaoyu Zhao, Yingyan Zhang, Yihe Zhang, Wei Zhang, Jie Yang, Sritawat Kitipornchai
Summary: This paper proposes a data-driven modeling approach to accurately predict the mechanical properties of graphene-reinforced nanocomposites with vacancy defects. The developed micromechanics models based on molecular dynamics (MD) databases and genetic programming (GP) algorithm provide efficient predictions of thermo-elastic properties with high coefficients of determination. The models are also applied in analyzing the structural behaviors of defective graphene reinforced composite beams.
ENGINEERING WITH COMPUTERS
(2023)
Article
Engineering, Mechanical
Liangteng Guo, Shaoyu Zhao, Yongqiang Guo, Jie Yang, Sritawat Kitipornchai
Summary: This paper investigates the dispersion characteristics of elastic waves in functionally graded laminated phononic crystals (FGLPCs) containing auxetic metamaterials enabled by graphene origami. The material properties of FGLPCs are determined by genetic programming-assisted micromechanical models, with nonuniform distributions of graphene weight fraction and hydrogen coverage in unit cells. The dispersion relations of elastic waves are obtained using the state space approach and the method of reverberation-ray matrix. The study shows that introducing auxetic metamaterials into FGLPCs can effectively manipulate elastic waves, with graded distribution of weight fraction leading to bandgaps for both transverse and longitudinal waves.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Lulu Liu, Zixiang Zhang, Airong Liu, Jie Yang
Summary: This study investigates the out-of-plane buckling behavior of functionally graded porous I-shaped circular arches with graphene platelets reinforcements under a uniform temperature field. The expressions for prebuckling internal forces caused by thermal expansion are derived accurately. The theoretical buckling temperature difference is obtained using the Ritz technique and is validated by finite element analysis. The influence of graphene platelets weight fraction, porosity coefficient, and porosity distribution patterns on buckling temperature difference is thoroughly examined.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Chemistry, Physical
Yucheng Fan, Ziyan Hang, Huanxun Liu, Chuang Feng, Jie Yang, Yu Su, George J. Weng
Summary: The incorporation of room temperature ionic liquids (ILs) into dielectric elastomer composites is of great interest due to their potential applications. This study develops a micromechanical model with an electric double layer (EDL) to predict the electrical properties of IL enhanced soft composites (ILESCs) and reveals the physical mechanisms behind the phenomena. The results show good agreement with experimental data and provide insights for optimizing ILESCs with high dielectric constants and frequency-dependent stability.
Article
Engineering, Civil
Yixiao Zhang, Airong Liu, Yonghui Huang, Jie Yang, Jiyang Fu, Yuguo Yu, Xinbing Zeng
Summary: This study experimentally investigated the mechanical characteristics of high-strength concrete-filled-steel-tubular (HS-CFST) arches and developed finite element models to predict their bearing capacity. The results showed that the ultimate bearing capacity, confinement effect, and ductility of the arch were closely related to the strength of the steel and core concrete.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Civil
Helong Wu, Ziqiang Zheng, Jing Guo, Long Li, Yumei Bao, Jie Yang
Summary: This paper presents the axisymmetric thermal postbuckling analysis of functionally graded graphene platelets-reinforced composite (FG-GPLRC) annular plates with various geometric imperfections. The 3D Halpin-Tsai model is employed to estimate the effective modulus of graphene nanocomposites. Nonlinear governing equations are derived and solved by the generalized differential quadrature method combined with the modified Newton-Raphson iteration. Parametric studies are conducted to highlight the influences of imperfection amplitude, localization degree, location, and half-wave number on the thermal postbuckling behavior of FG-GPLRC annular plates.
THIN-WALLED STRUCTURES
(2023)
Article
Mechanics
Zhi Ni, Yucheng Fan, Ziyan Hang, Jinlong Yang, Chuang Feng, Jie Yang
Summary: The nonlinear dynamics of IL enhanced soft composite (ILESC) dielectric membrane under electro-mechanical loading are investigated in this paper. A mixed micromechanical model is developed to estimate the mechanical and electrical properties of the ILESC. The governing equations are derived and solved using numerical methods. The results are verified through comparison with experimental data and previous results. The influence of various factors on the vibration and resonant response of the ILESC membrane is comprehensively analyzed.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Zixuan Kuang, Airong Liu, Jie Yang, Jian Deng
Summary: This paper investigates the out-of-plane dynamic instability of functionally graded porous graphene platelets reinforced composites circular shallow arches under a radial periodic concentrated load in a thermal environment for the first time. The Hamilton principle is used to derive the equations of motion for the arches. The dynamic instability regions are determined using Bolotin's method and verified with finite element software ANSYS.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Mechanical
Lu Liu, Xiaoli Jia, Jinglong Zhang, Shoubao Li, Shutong Huang, Liaoliang Ke, Jie Yang, Sritawat Kitipornchai
Summary: With the development of flexible electronics, flexible pressure sensors are widely used in various fields. However, designing a sensor with high sensitivity, low cost, and simple manufacturing process remains a challenge. In this study, a flexible strain sensor based on discarded mask straps with a unique 3D twist-like network structure is reported. The sensor shows advanced performance and has broad application prospects.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Civil
Yuanyuan Liu, Airong Liu, Zixiang Zhang, Mark A. Bradford, Jie Yang
Summary: This paper investigates the non-linear in-plane primary resonance behavior of functionally graded porous sinusoidal arches made of graphene platelet reinforced composites subjected to transverse harmonic excitation. They establish the equations of motion based on the neutral plane, consider the force and bending moment equilibrium conditions to eliminate the coupling of inner forces, and use an incremental harmonic balance technique to determine the frequency response features. The study finds that the increasing porosity coefficient exacerbates the left-inclined softening behaviors of the frequency response curves, while the left-inclined effect weakens as the graphene platelet weight fraction gradually grows.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Civil
Zilin Zhong, Airong Liu, Yonghui Guo, Xiaobin Xu, Jian Deng, Jie Yang
Summary: This paper presents the first attempt to investigate the in-plane sub-harmonic and simultaneous resonance instability of a thin-walled arch under a vertical base-excitation at a combination of two frequencies. The study derives the kinematic equation of the arch and determines the instability regions using numerical methods. The findings provide important insights for optimizing the design of thin-walled arches.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Aerospace
Zhicheng Yang, Helong Wu, Shaoyu Zhao, Jie Yang, Airong Liu, Jiangen Lv, Jiyang Fu
Summary: This paper investigates the electro-induced nonlinear static bending and vibration behaviors of the graphene platelets reinforced dielectric porous (GPLRDP) arches. The effective dielectric permittivity and Young's modulus of GPLRDP composites are determined based on the effective medium theory (EMT). The nonlinear governing equations for the GPLRDP arch under the electrical voltage are derived and numerically solved. The effects of various factors on the nonlinear behaviors of the GPLRDP arch are discussed, and it is found that adjusting material and structural parameters can actively tune its electro-induced behaviors.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Mechanics
Liangteng Guo, Shaoyu Zhao, Jie Yang, Sritawat Kitipornchai
Summary: This study introduces composites reinforced with graphene origami nanofillers into functionally graded multilayered phononic crystals. Numerical investigations reveal that these materials possess negative Poisson's ratio and offer unique mechanical properties, which can be tuned by adjusting the weight fraction and hydrogen coverage of the graphene fillers.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2024)
Article
Engineering, Civil
Youzhe Yang, Jun Ma, Jie Yang, Yingyan Zhang
Summary: Two-dimensional nanomaterials like graphene and h-BN have high mechanical strength and thermal conductivity, making them ideal reinforcing fillers for impact protection materials, phase change materials, and thermal interface materials. However, the mechanical properties of graphene/h-BN heterostructures have not been widely explored. This study used molecular dynamics simulations and finite element analysis to investigate the mechanical properties, fracture mechanisms, and manipulation techniques of graphene/h-BN heterostructures. The results show that heterogeneous GBN has excellent performance in resisting bending deformation, and its size-dependent performance can be manipulated through hydrogenation and layer number.
THIN-WALLED STRUCTURES
(2024)
