Article
Mechanics
Chang Tao, Ting Dai
Summary: This study establishes the nonlinear free vibration equations for multilayer functionally graded graphene platelets-reinforced composite annular sector microplates using the principle of virtual work. By utilizing NURBS-based isogeometric analysis and a displacement control strategy, the linear natural frequencies and nonlinear-to-linear natural frequency ratios of the microplates are obtained synthetically. Parametric studies are conducted to investigate the influences of distribution pattern and weight fraction of graphene platelets, sector angle, and material length scale parameter on the vibrational behaviors of the microplates under different boundary conditions.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2021)
Article
Mechanics
Hang Xu, Yan Qing Wang, Yufei Zhang
Summary: This work analyzes the free vibration of a spinning functionally graded graphene platelet-reinforced metal foam beam, considering the effects of graphene platelet geometry size, types of porosity, and distributions on the vibration characteristics.
ARCHIVE OF APPLIED MECHANICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Jie Zheng, Chunwei Zhang, Afrasyab Khan, Tamer A. Sebaey, Naeim Farouk
Summary: The study developed a semi-analytical procedure using the TE-GDQ technique to investigate the asymmetric stability of functionally graded graphene platelet reinforced nanocomposite annular plates under thermal loading. The research determined the equivalent Young's modulus of the plate, extracted governing equations using FSDT and von-Karman relations, and applied the TE-GDQ procedure to derive stability relations. Validation and parametric studies were conducted to analyze the influence of various factors on the structure stability.
ENGINEERING WITH COMPUTERS
(2022)
Article
Engineering, Civil
M. M. Keleshteri, J. Jelovica
Summary: The study proposes a novel approach to simplify the boundary condition issue of higher-order differential equations by reducing the order of the governing differential equations of beams from four to two through the introduction of a new dependent function. The new method demonstrates high accuracy in buckling and vibration analysis of different kinds of composites.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Mechanical
Xia Qin, Yajing Shen, Wei Chen, Jiansheng Yang, L. X. Peng
Summary: This study presents a meshless method based on the first-order shear deformation theory for bending and free vibration analyses of circular stiffened plates. The method discretizes the circular stiffened plate, constructs shape functions using the moving least-squares approximation, and derives displacement fields. Analysis of convergence and domain of influence suggests the method is suitable for optimization studies on stiffener location.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Metallurgy & Metallurgical Engineering
Liu Yun-fei, Qin Zhao-ye, Chu Fu-lei
Summary: The nonlinear vibration of graphene platelets reinforced composite corrugated (GPRCC) rectangular plates with shallow trapezoidal corrugations is investigated. The unit cell half period, unit cell inclination angle, unit cell height, graphene platelet dispersion pattern, and graphene platelet weight fraction and geometry play important roles in the nonlinear vibration of the GPRCC plates.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Engineering, Civil
Jing Zhang, Lianhe Li
Summary: This paper investigates the free vibration of a functionally graded graphene platelets reinforced composite porous L-shaped folded plate. The governing equations for free vibration of each subelement are deduced based on Mindlin-Reissner plate theory and Hamilton's principle. The natural frequency is obtained by discretizing and numerically solving the governing equations for each subelement using the generalized differential quadrature element method. The study examines the influence of various factors on the natural frequency and finds that incorporating graphene platelets enhances the mechanical performance of the porous folded plate, and the distribution of graphene platelets near the upper and lower layers affects the stiffness and natural frequency.
ENGINEERING STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Gongxing Yan, Xia Zhou, Mohammed A. El-Meligy, Mohamed Sharaf
Summary: The study focuses on the thermally induced nonlinear vibration of doubly curved graphene nanoplatelet reinforced nanocomposite panels subjected to abrupt thermal shock. The one-dimensional transient heat equation is solved using the Crank-Nicholson technique and generalized differential quadrature (GDQ). The findings are revalidated by comparing them to previous research and using the Extreme Gradient Boosting (XGBoost) machine learning algorithm.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Marine
Mohammad Jebelli, Mehran Masdari
Summary: The study investigates the effect of adding parallel plates in the wake of a circular cylinder and altering their horizontal and vertical positions on flow-induced vibration. Results show that changes in vertical distance affect vortex shedding suppression mechanism, with smaller vertical distances leading to larger horizontal non-oscillating range and higher amplitudes.
Article
Chemistry, Physical
Xianguang Sun, Weichao Chi, Jia Luo
Summary: A novel dynamic model of a graphene-platelet-reinforced, porous double-cylindrical-panel system is proposed in this study, and its material properties are determined by the Halpin-Tsai micromechanics model and the typical mechanical properties of open-cell metal foams. The theoretical formulation is derived using Love's shell theory, and the natural frequencies of the system are calculated using the Rayleigh-Ritz method. The proposed model is validated by comparison with existing literature, and the effects of various factors on the free vibration characteristics of the system are evaluated.
Article
Computer Science, Interdisciplinary Applications
Muhammad Ageel Ashraf, Zhenling Liu, Dangquan Zhang, Binh Thai Pham
Summary: The main purpose of this research is to investigate the impacts of a two-parameter elastic medium on the geometrically nonlinear free vibration of nanocomposite annular sector plates reinforced with graphene platelets. The nonlinear sets of motion equations are derived and numerical methods are used to obtain the nonlinear vibration response. The study also examines the effects of geometrical and material factors on the nonlinear vibration behavior of the plates.
ENGINEERING WITH COMPUTERS
(2022)
Article
Mechanics
Yucheng Zhou, Kefu Huang
Summary: This paper presents an effective analytical elastic general solution to the inhomogeneous spatial axisymmetric problem and studies the axisymmetric bending problem of functionally graded circular plates based on this general solution, obtaining analytical solutions consistent with existing numerical results. The explicit elastic field distributions related to the inhomogeneous parameter demonstrate the influence of inhomogeneity on stress and displacement in FGM circular plates.
Article
Chemistry, Physical
Tianhao Huang, Yu Ma, Tianyu Zhao, Jie Yang, Xin Wang
Summary: This paper conducts a free vibration analysis of a sandwich annular thin plate with whirl motion, taking into account the functionally graded core and distribution of graphene nanoparticles. The finite element method is used to verify the model and analyze the vibration. The effects of various factors on the free vibration behavior are examined in detail.
Article
Engineering, Civil
Yuan Wang, Junjian Fan, Xiang Shen, Xiaobo Liu, Jianrun Zhang, Naifei Ren
Summary: The Nitsche based non-uniform rational B-splines (NURBS) isogeometric analysis (IGA) method is used to study the free vibration of a stiffened plate with holes. The plate and stiffeners are modeled using Reissner-Mindlin theory and Timoshenko beam theory. The presented method divides the plate into non-overlapping NURBS patches along with the stiffeners and constructs the holes using different NURBS patches. The Nitsche method is employed to join the different patches and conduct the free vibration analysis. Numerical examples validate the correctness of the method and show its effectiveness.
THIN-WALLED STRUCTURES
(2022)
Article
Mechanics
Hulun Guo, Kun Huang, Zuxiang Lei
Summary: This article investigates the dynamic characteristics of graphene nanoplatelet (GPL) reinforced rotating laminated composite cantilever plates using the IMLS-Ritz method. The effects of various parameters on the natural frequencies are studied, and it is found that the addition of graphene nanoplatelets can increase the natural frequency of the cantilever plates. However, the increment of natural frequency decreases when the rotating speed is high enough.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Engineering, Mechanical
H. Bagheri, Y. Kiani, M. R. Eslami
Summary: The geometrically nonlinear thermally induced vibrations of functionally graded material beams resting on an elastic foundation are analyzed in this research. The results show that thermally induced vibrations do exist under certain conditions and are influenced by factors such as beam geometry and material composition.
IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY-TRANSACTIONS OF MECHANICAL ENGINEERING
(2023)
Article
Engineering, Civil
H. Bagheri, M. R. Eslami, Y. Kiani
Summary: The current research focuses on analyzing the geometrical non-linear thermally induced vibrations of functionally graded material (FGM) joined conical-conical shells. The thermo-mechanical properties of the shell are assumed to be temperature and position dependent. The study investigates the effects of conical geometry, material composition, temperature dependence, mechanical properties, shell system configuration, and thermal boundary conditions.
THIN-WALLED STRUCTURES
(2023)
Article
Mechanics
H. Bagheri, Y. Kiani, M. R. Eslami
Summary: This study investigates the dynamic response of hermetic capsule construction made of functionally graded materials under thermal shock. Material properties are derived using the Voigt and Toloukian models, taking into account the dependence on position and temperature. A one-dimensional transient heat transfer equation is established and solved using the Crank-Nicholson approximation and Picard's iterative method with the GDQ numerical method. The resulting temperature distribution is then used to determine the thermal force and moment. The equations of motion are derived using the first-order shear theory and the von Karman form of geometric non-linearity, and solved using the Newton-Raphson iterative approach and the ss-Newmark time estimate approach.
Article
Mechanics
Yong Tao, Chu Chen, Yaser Kiani
Summary: An analysis is conducted to study the vibration response of sandwich cylindrical panels with piezoelectric layers. The core material is a composite laminated media reinforced with graphene platelets. The study explores the effects of graded patterns of graphene platelets, weight fraction of graphene platelets, mechanical and electrical boundary conditions, number of layers, and geometrical parameters. The results indicate that frequencies can be controlled by proper graded patterns and weight fraction of graphene platelets. Open circuit electrical boundary conditions lead to higher natural frequencies compared to closed circuit conditions.
Article
Mathematics, Applied
Hadi Babaei, Yaser Kiani, Krzysztof Kamil Zur
Summary: This research analyzes the nonlinear thermal stability of graphene platelet reinforced composite (GPLRC) beams based on the third-order shear deformation model and Reddy and von-Karman kinematic assumptions. The study takes into account the influences of the three-parameter nonlinear hardening/softening elastic foundation and initial imperfection. GPLs are distributed in the composite media's layers, forming a piecewise functionally graded media. The Halpin-Tsai rule is used to estimate the elasticity modulus, and the Voigt's rule is used to obtain the thermal expansion coefficient and Poisson's ratio. Three coupled governing equations are established using the static version of the Hamilton principle. The results show the occurrence of instability and sensitivity to imperfections under certain conditions of elastic foundation and GPL patterns.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2023)
Article
Engineering, Civil
Ahmad Haghani, Yaser Kiani
Summary: This research investigates the thermal buckling and post-buckling of graphene platelets (GPLs)-reinforced composite beam under temperature changes. The governing equations of the beam are obtained using virtual work principle, shear deformation theory, and von Karman strain field. The effective properties of the materials are determined using the Halpin-Tsai model and rule of mixtures. It is found that the beam response is not bifurcation type for beams with simply supported edges and asymmetric material distribution.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Mechanics
H. Bagheri, Y. Kiani, M. R. Eslami
Summary: This research investigates the geometrically non-linear thermally induced vibrations of functionally graded material (FGM) joined spherical-conical shells. The thermo-mechanical properties of the shells are assumed to be temperature and position dependent. The analysis includes solving the one-dimensional transient heat conduction equation and solving non-linear coupled equations of motion using the iterative Picard method and the beta-Newmark time approximation technique.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Engineering, Civil
Liwei Xin, Yaser Kiani
Summary: This research performs an analysis to determine the natural frequencies and mode shapes of a thick sandwich beam with metal foam core. Different types of foams with functionally graded patterns of pore distribution are considered. The governing equations of the sandwich beam are established using a shear and normal deformable thick beam model that accounts for thickness stretching and nonuniform through-the-thickness shear strain. The established equations are then solved for thick sandwich beams resting on elastic foundation using the Navier solution method. The results of this study are compared with existing data and new insights are provided on the effects of various parameters on the vibration characteristics of the sandwich beam. It is demonstrated that the porosity of the core is an important factor influencing the vibration characteristics of the sandwich beam with metal foam core.
Article
Mechanics
Mehdi Karimipour Dehkordi, Yaser Kiani
Summary: The current investigation focuses on the response of a hollow cylinder within the framework of generalized magneto-thermoelasticity. The results show the propagation and reflection of thermal, electrical, mechanical and magnetic waves. It is verified that temperature propagates with a finite speed.
Article
Mechanics
Liwei Xin, Yaser Kiani
Summary: This study analyzes the generalized coupled thermoelastic wave propagation and temporal evolution in a bi-layered system. The main layer is made of functionally graded materials (FGM), while the holder layer is viscoelastic. The constituent volume fractions in the FGM layer are calculated using a power law function. The study employs the Voigt rule of mixtures and the Kelvin-Voigt model for material properties and constitutive law, respectively. The Chebyshev collocation element (CCE) method is used for spatial-dependent equations and the Newmark numerical integration method is implemented for calculating the system response. The obtained results are verified with limited literature articles and parametric results are shown to evaluate the influence of FG and viscoelastic characteristics on the FGM layer response under a thermal shock.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Civil
Suxia Hou, Minghai Li, Jijun Luo, Yaser Kiani
Summary: This study contributes to the modeling and analysis of damping and vibration in the innovative composite sector with glass fiber-reinforced magnetorheological elastomer (MRE) plates. The study uses polar orthotropic laminas and generalized Maxwell constitutive law to describe the tunable viscoelastic properties of the MRE elastomer. The effects of a magnetic field on the storage and loss moduli, as well as the influence of composite and geometric properties on natural frequencies and modal loss factors, are investigated.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Mechanical
H. Bagheri, Y. Kiani, M. R. Eslami
Summary: This study investigates the geometrically nonlinear dynamic response of a functionally graded material conical-cylindrical-conical joint shell construction exposed to rapid surface heating. The material properties are determined using the Voigt and Touloukian models, and the equations of motion are derived using the first-order shear deformation theory and the von Karman form of nonlinear kinematics. The study finds that the geometrical characteristics and boundary conditions of the shell are important factors influencing the dynamic response of the shell system under rapid surface heating.
JOURNAL OF VIBRATION ENGINEERING & TECHNOLOGIES
(2023)
Article
Engineering, Civil
A. Haghani, R. Ghaderi, Y. Kiani
Summary: Currently, Atomic Force Microscope (AFM) is widely used for nanoscale measurements and manipulation. This study investigates the possibility of utilizing graphene-nanoplatelet-reinforced composite (GPLRC) in AFM microcantilever (MC). The nonlinear vibrational behavior of GPLRC MC and its interaction with the sample surface are compared with that of the silicon MC. The results show that GPLRC MC is more sensitive to the nonlinearity of the interaction force.
Article
Mathematics
Yunhe Zou, Yaser Kiani
Summary: This research analyzes the natural frequencies of a graphene-platelet-reinforced composite plate at nanoscale using the nonlocal elasticity theory. The results show that the natural frequencies of the plate can be enhanced by introducing an appropriate amount and distribution pattern of graphene-platelet-reinforced material.
Article
Engineering, Civil
Zuocai Dai, Yaser Kiani
Summary: In this study, a novel analysis approach for lattice composite cylindrical shells reinforced with Graphene Platelets (GPL) nanoparticles is presented. The investigation focuses on the advanced structures, incorporating nanocomposite reinforcement, orthotropic inhomogeneity, and semi-analytical methods. The study provides insights into the stability response of these innovative structures by incorporating theoretical formulations and stability analysis.
ENGINEERING STRUCTURES
(2023)
Article
Mechanics
Rawan Aqel, Patrick Severson, Rani Elhajjar
Summary: A novel core splice joint configuration for composite sandwich structures is studied and proposed to improve the strength and toughness. Experimental and numerical efforts show that this configuration can significantly increase the ultimate strength by 13% to 51% and the toughness by 2% to 35%.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xianheng Wang, Cong Chen, Jinsong Zhang, Xinming Qiu
Summary: In this paper, a new form-finding method based on spatial elastica model (FMSE) is proposed for elastic gridshells. The method integrates the deformations of elastic rods into the overall deformation of the gridshell, and solves a set of transcendental equations using the quasi-Newton method to ensure the deformation satisfies the given boundary conditions. The method is validated through experiments and expected to have potential applications in the investigations of elastic gridshells.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Hao Huang, Zitong Guo, Zhongde Shan, Zheng Sun, Jianhua Liu, Dong Wang, Wang Wang, Jiale Liu, Chenchen Tan
Summary: The conventional evaluation of 3D braided composites' mechanical properties through numerical and experimental methodologies hinders material application due to the expenses, time constraints, and laborious efforts involved. This study establishes a multi-scale finite element model and a surrogate model for predicting the elastic properties of 3D4D rotary braided composites with voids. By optimizing a neural network model, the results are validated and provide valuable insights into the microstructure and properties of these composites.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xinyu Li, Hao Zhang, Haiyang Yang, Junrong Luo, Zhongmin Xiao, Hongshuai Lei
Summary: Due to their excellent mechanical properties and design flexibility, fluted-core composite sandwich structures have gained significant attention in aerospace and rail transit applications. This study investigated the free-vibration characteristics and optimized design of composite fluted-core sandwich cylinders through theoretical models and experimental tests.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Chao Li, Chunzheng Duan, Xiaodong Tian, Chao Wang
Summary: A mechanistic model considering the bottom edge cutting effect and the anisotropic characteristics of the material is proposed in this paper to accurately predict cutting forces. The model was validated through a series of milling experiments and can be used to predict the cutting force of various parts of the cutter and any feed direction.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Camila Sanches Schimidt, Leopoldo Pisanelli Rodrigues de Oliveira, Carlos De Marqui Jr
Summary: This work investigates the vibro-acoustic performance of graded piezoelectric metamaterial plates. The study shows that piezoelectric metamaterial plates with reconfigurable properties can provide enhanced vibration and sound power attenuation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jun Ke, Li-jie Liu, Zhen-yu Wu, Zhong-ping Le, Luo Bao, Dong-wei Luo
Summary: Compared with other green natural fibers, ramie has higher mechanical properties and lower cost. In this study, ramie and glass fiber are made into composite circular tubes. The results show that the hybrid circular tube with ramie and glass fiber has improved torsional mechanical properties and reduced weight and cost. The failure mechanisms are affected by the loading direction and the content of each fiber.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Natalia Pingaro, Gabriele Milani
Summary: This paper proposes an enhanced analytical model for predicting the behavior of FRCM samples tested under standard tensile tests. The model takes into account the interaction between fibers and matrix through the interface, and assumes different material properties at different phases. By solving a second order linear differential equation, an analytical solution can be obtained. The model is validated with experimental data and shows good predictability.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jialiang Fan, Anastasios P. Vassilopoulos, Veronique Michaud
Summary: This article investigates the effects of voids, joint geometry, and test conditions on the fracture performance of thick adhesive Double Cantilever Beam (DCB) joints. It concludes that grooved DCB joints with low void content tested at low displacement rates showed stable crack propagation without significant crack path deviation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Auwalu I. Mohammed, Kaarthikeyan Raghupathy, Osvaldo De Victoria Garcia Baltazar, Lawson Onokpasah, Roger Carvalho, Anders Mogensen, Farzaneh Hassani, James Njuguna
Summary: This study investigates the performance of composite pressure vessels under damaged and undamaged conditions, providing insights into their reliability and residual strength capabilities. The results demonstrate that the damage profile and its effect on compressive strength are similar between damaged and non-damaged cylinders. When subjected to quasi-static compression, the polyethylene liner absorbs enough elastic strain energy to recover without plastic deformation. Additionally, quasi-static compression has little to no influence on the axial strength of the cylinders. The damage characterization reveals fiber breakage, delamination, local buckling, and brooming failure. This study has direct implications for the safety design tolerances, manufacturing strategies, and operational failure conditions of composite overwrapped pressure vessels (COPVs).
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Muhammad Irfan Shirazi, Samir Khatir, Djilali Boutchicha, Magd Abdel Wahab
Summary: Structural health monitoring is important to ensure the safety of components and structures. This study proposes a method using finite element models and 1D-CNN network to extract and classify vibration responses for crack detection. The results show that the proposed approach is effective in real-time damage detection.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Maryam Mirsalehi, Kiarash Kianpour, Sharif Shahbeyk, Mohammad Bakhshi
Summary: This study comprehensively investigates the one-way response of 3D-woven sandwich panels (3DWSPs) and their interfering parameters, providing interpretation of elastic and failure results, failure maps, and reliable theoretical models for linear elastic response and observed failure mechanisms.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Yiming Zhao, Zhonggang Wang, Zhigang Yang, Bin Qin
Summary: The paper proposes a Ritz and statistical energy analysis (Ritz SEA) hybrid method for calculating rectangular plate acoustic vibration coupling in the mid-frequency range. This method combines the fast convergence and ability to handle arbitrary boundary conditions of the Ritz method with the power flow equation of the statistical energy analysis method. The results show that this approach effectively filters out random fluctuations in mid-frequency domains while demonstrating exceptional stability and precision.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Joao Henrique Fonseca, Woojung Jang, Dosuck Han, Naksoo Kim, Hyungyil Lee
Summary: This study addresses the enhancement of an injection-molded fiber-reinforced plastic / metal hybrid automotive structure and its plastic injection molding process through the integration of the finite element method, artificial intelligence, and evolutionary search methods. Experimental validation of finite element models, the generation of a database through orthogonal array and Latin hypercube methods, and the training of artificial neural networks are conducted. The genetic optimization algorithm is then applied to identify optimal process parameters. The results show significant reduction in product warpage and manufacturing time while maintaining structural strength, contributing to the advancement of composite automotive structures with superior quality.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Alessandro Vescovini, Carina Xiaochen Li, Javier Paz Mendez, Bo Cheng Jin, Andrea Manes, Chiara Bisagni
Summary: This paper presents a study on six single-stringer specimens manufactured using the card-sliding technique with non-crimp fabrics and adopting a Double-Double (DD) stacking sequence. The specimens were tested under compression loading conditions to investigate post-buckling and failure in aerospace structures. Experimental results and numerical simulations were compared to analyze the behavior and failure modes of the specimens. The study found promising evidence of a viable solution to optimize aeronautical structures and enhance resistance to skin-stringer separation, particularly with the use of tapered flanges.
COMPOSITE STRUCTURES
(2024)
