Article
Engineering, Civil
Yu-Qi Hao, Feng-Lian Li, Yi-Ping Wang, Yu-Xin Hao, Mei Lv
Summary: This paper investigates the free vibration and sound insulation characteristics of FG-CNTRC sandwich plates with FG-CNT face sheets and different cores. It discusses the effects of parameters such as CNT volume fraction, distribution patterns, orientation angles, porosity coefficient, and incident angles on the vibro-acoustic characteristics of the sandwich plate. The results provide valuable references for further research.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Construction & Building Technology
Simmi Guptaa, H. D. Chalak
Summary: In this study, bending and free vibration analyses are conducted on sandwich FGM beams using the recently proposed HOZT. Different material gradation laws and stress distributions across the thickness are examined, revealing the distinct behavior of unsymmetric beams compared to symmetric ones. The findings provide valuable insights for future studies in this field.
STEEL AND COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Ping Xiang, Qing Xia, L. Z. Jiang, Linxin Peng, J. W. Yan, Xiang Liu
Summary: In this study, the free vibration analysis of functionally graded carbon nanotube reinforced composite conical shell was carried out using the element-free kp-Ritz method. The material properties were determined by rule of mixtures and varied with thickness. The effects of various factors on the free vibration frequency characteristics were discussed in detail.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Aerospace
Nguyen Dinh Duc, Phuc Pham Minh
Summary: This paper investigates the free vibration of functionally graded carbon nanotubes reinforced composite plates with cracks, using UD distribution of carbon nanotubes and TSDT and phase field theory to form vibration equations. Finite element method with enrichment of elements around the cracked area is used for solving the equations. Computational simulation analyzes the influence of various factors on the free vibration of FG CNTRC plates, as well as investigates different boundary conditions.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Civil
M. M. Keleshteri, J. Jelovica
Summary: This study proposes a novel higher-order porosity distribution model and investigates the free vibration and buckling behavior of cylindrical sandwich panels to validate the accuracy and effectiveness of the model. The results show that the higher-order porosity distribution can significantly increase the buckling load and fundamental natural frequency of cylindrical sandwich panels.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
M. Lezgy-Nazargah, Armagan Karamanli, Thuc P. Vo
Summary: This paper investigates the bending, vibration, and buckling behavior of functionally graded curved sandwich beams using a global-local refined shear deformation theory. The material properties of these beams are varied through the thickness according to the power-law distribution. A beam element with a combination of Hermite cubic and quadratic Lagrange shape functions is developed to solve the problems. The results obtained from this model are compared with those from finite element software (ABAQUS) and other higher-order beam theories, showing accurate prediction of static, vibration, and buckling responses of both shallow and deep FG sandwich beams with arbitrary boundary conditions.
Article
Engineering, Civil
Hadi Babaei, Yaser Kiani, M. Reza Eslami
Summary: This research focuses on analyzing the thermal buckling and post-buckling of carbon nanotube reinforced composite beams. The study establishes governing equations for the composite beam by considering factors such as non-uniform distribution of CNTs, non-linear elastic foundation, and temperature dependency. Results show that different types of edge supports lead to varying post-buckling responses in the beam, while factors like foundation parameters, geometrical characteristics, and CNT volume fraction also play a role in affecting the beam's performance.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2021)
Article
Mechanics
Yanchun Zhai, Jiaxing Ma, Yangyang Yan, Qiang Li, Shaoqing Wang, Guanqin Wang
Summary: In this article, thermal buckling and free vibration of Composite Sandwich Curved Panels (CSCP) in a thermal environment are analyzed using Hamilton's principle and Navier method. The study examines the influence of structural parameters on Critical Buckling Temperature (CBT) and presents new insights into thermal buckling and free vibration of CSCP.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
K. Foroutan, E. Carrera, H. Ahmadi
Summary: This paper investigates the nonlinear free vibration and nonlinear dynamic hygrothermal buckling behavior of imperfect functionally graded carbon nanotube-reinforced composite cylindrical panels under a hygrothermal environment. Various factors such as temperature, moisture, material parameters, etc. are considered in relation to their influence on the system behavior.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2021)
Article
Mechanics
H. D. Chalak, A. M. Zenkour, Aman Garg
Summary: This study aims to analyze the free vibration of functionally graded single-walled carbon nanotube-reinforced composite (FG-CNTRC) beams under hygro-thermal conditions. The C-0 finite element-based higher-order zigzag theory is used, and five different graded beams are studied. The results show that stresses at higher mode of vibration are more affected by temperature or moisture concentration, and the stress distribution is widely influenced by the gradation law and temperature or moisture values.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Engineering, Civil
S. Masoud Marandi, Iman Karimipour
Summary: This study investigates the free vibration analysis of Nanoscale CNTRCs sandwich beams using an extended high-order technique. The face sheets are made of PMMA reinforced with single-wall carbon nanotubes and the honeycomb structure is used for the flexible core. The study utilizes the first-order shear deformation theory for the skins and the high-order sandwich panel theory for the core, considering transverse shear strains. The shooting method is adopted as the numerical solution for solving the governing differential equations and determining the natural frequencies. The influences of carbon nanotubes distribution pattern, volume fraction, boundary conditions, length scale parameter, core thickness, and slenderness ratio on vibration responses are discussed.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Said Mesmoudi, Mohammed Rammane, Youssef Hilali, Omar Askour, Oussama Bourihane
Summary: The main purpose of this paper is to analyze the buckling and post-buckling behavior of porous functionally graded (FG) beams and sandwich beams using a new efficient optimal mesh-free high order algorithm. The proposed solver combines a mesh-free approach based on the radial point interpolation method with a high order continuation method (RPIM-HOCM). The effect of various factors on the critical buckling load and post-buckling behavior is investigated using the RPIM-HOCM solver.
ENGINEERING STRUCTURES
(2023)
Article
Mechanics
Cong Ich Le, Ngoc Anh T. Le, Dinh Kien Nguyen
Summary: This study presents an efficient beam element model for free vibration and buckling analysis of bidirectional functionally graded sandwich beams. By analyzing the natural frequencies and buckling loads of beams under different boundary conditions, the effects of material distribution and layer thickness on vibration and buckling characteristics are investigated.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Erfan Cheshmeh, Mohammed Karbon, Arameh Eyvazian, Dong Won Jung, Mostafa Habibi, Mehran Safarpour
Summary: The buckling and vibration analysis of FG-CNTRC rectangular plate are investigated based on 12-unknown higher order shear deformation theory (HSDT) in this study. The study explores the influence of temperature distribution and boundary conditions on the behavior of the plate through numerical analysis and parametric study.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Mechanics
S. W. Yang, Y. X. Hao, W. Zhang, L. Yang, L. T. Liu
Summary: This paper establishes the dynamic model of an eccentric rotating FG-GPLRC cylindrical shell, analyzes its free vibration and buckling behaviors, and considers the influences of various factors including graphene platelets distribution patterns, weight fraction, eccentric distance, etc.
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, Civil
Wenbiao Sun, Wei Fan, Jie Yang, Yang Zhang, Zhengwu Zhong
Summary: This study conducted 34 push-out tests to investigate the interfacial shear performance of UHPC-strengthened RC structures using post-installed rebar connections. The results showed that the embedded depth of the rebar significantly influenced the connection performance, and a formula was proposed to determine the minimum embedded depth. The experimental and theoretical results facilitate the design and application of post-installed rebar connections in UHPC-strengthened RC structures.
ENGINEERING STRUCTURES
(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
Materials Science, Composites
Bowen Zeng, Jinlong Yang, Ziyan Hang, Yucheng Fan, Chuang Feng, Jie Yang
Summary: This study investigates the pyroelectric performances of GNP/PVDF composite films under different scenarios using graphene nanoplatelets as a reinforcing filler. The addition of GNP significantly enhances the formation of the beta phase in PVDF and improves the pyroelectric performances of the composite. A parametric study shows that reducing the thickness of the composite film and increasing the temperature can further enhance the pyroelectric performances. Additionally, the addition of GNPs also improves the thermal stability of the composite film.
POLYMER COMPOSITES
(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
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)