Article
Mechanics
Nitin Sharma, Subham Mohapatra, Erukala Kalyan Kumar, Subrata Kumar Panda
Summary: This paper discusses the nonlinear aeroelastic flutter characteristics of laminated composite curved panels under supersonic flow using finite element solutions. The panel model considers full geometrical nonlinearity using a third-order shear deformation theory and includes flutter due to aerodynamic loading using the first-order piston theory. The predicted solution accuracy is validated by comparing with available numerical data. Various numerical examples are presented to study the impact of parameters on the supersonic flutter boundaries of shell panels, such as fiber orientation, flow angle, boundary conditions, aspect ratio, modular ratio, thickness ratio, and amplitude ratio. It is found that the critical aerodynamic pressure for simply supported cross-ply flat panels increases by 42.85% when the amplitude ratio increases from 0 to 0.75.
INTERNATIONAL JOURNAL OF APPLIED MECHANICS
(2023)
Article
Engineering, Civil
J. A. Moreira, F. Moleiro, A. L. Araujo, A. Pagani
Summary: This study evaluates Equivalent Single Layer (ESL) and Layerwise finite element models for panel flutter and buckling analysis of supersonic variable stiffness composites. It explores variable-order shear deformation theories and Lagrange z-expansions. Numerical applications focus on simply supported panels with curvilinear fibre composite layers, including a cross-ply configuration for comparison purposes and various side-to-thickness ratios. The accurate prediction of transverse shear and bending-twisting coupling is highlighted for proper tailoring and analysis of supersonic curvilinear composites.
THIN-WALLED STRUCTURES
(2023)
Article
Mechanics
Duarte Cachulo, Hamed Akhavan, Pedro Ribeiro
Summary: This study investigates the aeroelastic stability of Variable Stiffness Composite Laminates (VSCL) cylindrical shells under supersonic airflow. The use of curvilinear reinforcement fibres is explored to increase the flutter speed. A linear mathematical model is developed for thin circular cylindrical VSCL shells. The finite element method is used to obtain the natural frequencies, mode shapes, and critical flutter conditions.
COMPOSITE STRUCTURES
(2023)
Article
Chemistry, Multidisciplinary
Min Wang, Leilei Zeng, Changying Zhao, Shupeng Sun, Yang Yang
Summary: The aerothermoelastic behavior of a conical shell in supersonic flow is studied in this paper. The kinetic energy and strain energy of the conical shell are expressed based on Love's first approximation shell theory, and the aerodynamic model is established using the linear piston theory with a curvature correction term. The mode function of the conical shell under different boundary conditions is obtained using the Rayleigh-Ritz method with characteristic orthogonal polynomial series as admissible functions. The dynamic model of the conical shell is derived using the Lagrange equation. Variations in the natural frequencies with respect to temperature and free-stream static pressure, as well as the effects of various geometric and loading parameters, are analyzed in detail for the aerothermoelastic stability of the structure.
APPLIED SCIENCES-BASEL
(2023)
Article
Mechanics
Yihang Gao, Jingbo Duan, Yongjun Lei, Buqing Xu
Summary: The thermal buckling and nonlinear flutter characteristics of laminated composite panels with curvilinear fiber paths in supersonic flow are investigated in this study. The structural modeling and loading effects are considered, and the nonlinear equations of motion are solved using the finite element method. The results show that the curved fiber angle, temperature rise, and dynamic pressure have significant effects on the panel's performance.
Article
Engineering, Marine
Zhun Li, C. Guedes Soares, Guang Pan
Summary: This paper presents buckling solutions for composite laminated cylindrical shells in the underwater environment. Two calculation formulas are proposed to predict the buckling pressure for the underwater composite cylinders with different boundary conditions. The results are validated by comparison with experimental data and consider the influences of geometrical imperfections.
Article
Engineering, Civil
Yongmei Zhu, Wei Guan, Weili Wang, Cunhao Dong, Jian Zhang
Summary: This study numerically and experimentally investigated the buckling of carbon fiber composite cylindrical shells with annular ribs under external pressure. It was found that the distribution and geometry of the ribs have a significant influence on the buckling load and final collapse mode of the material.
ENGINEERING STRUCTURES
(2023)
Article
Mechanics
Gaojian Lin, Fei Li, Qiuting Zhang, Pengwan Chen, Weifu Sun, Ivan Saikov, Vladimir Shcherbakov, Mikhail Alymov
Summary: This study investigated the dynamic stability of cylindrical fiber composite shells with metal liner subjected to uniform internal pressure pulse, revealing the pulse buckling of the inner metal liner and vibrational buckling of the outer fiber composite shell. Numerical simulations showed the effect of buckling amplitude of the inner metal liner on the dynamic stability of the outer fiber composite shell.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Mechanical
Sarmila Sahoo
Summary: The buckling behavior of composite stiffened cylindrical shell panels with cutout is analyzed using the finite element approach. Parametric studies reveal that the buckling load and mode shapes are dependent on the size of cutout, ratio of shell width to thickness, degree of orthotropy, and fiber orientation angle.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Civil
Yacine Ben-Youssef, Youcef Kerboua, Aouni A. Lakis
Summary: This paper presents a numerical model for analyzing the aeroelastic stability of a thin cylindrical shell subjected to external supersonic airflow, taking into account the effect of geometric nonlinearity on the dynamic behavior of the structure. Numerical studies are conducted to validate the accuracy of the model.
THIN-WALLED STRUCTURES
(2022)
Article
Mechanics
Peng Wu, Fei Yu, Kong Yue, Jie Wang, Linxiao Xie
Summary: This work proposes analytical solutions for the thermo-mechanical analysis of laminated cylindrical shells bonded by viscoelastic interlayers, taking into consideration the temperature effects on thermal expansion difference and temperature-dependent viscoelastic property. The analytical model solves the non-uniform temperature fields using the transfer matrix method based on heat transfer theory. The governing equations for the laminated cylindrical shell are established using thermoelasticity theory and viscoelasticity theory. The time-dependent stresses and displacements are determined using Laplace transform and Fourier series expansion. The results are consistent with finite element solutions and provide insights into the long-term bending behavior of the laminated cylindrical shell affected by temperature, material, and geometric parameters.
COMPOSITE STRUCTURES
(2022)
Editorial Material
Mechanics
Zhengxiong Chen, Bin Qin, Qingshan Wang, Rui Zhong, Ailun Wang
Summary: The first order shear deformation theory (FSDT) is used to formulate a generalized model of laminated open cylindrical shell coupled with rectangular plates (LOSPS). The characteristics of free vibration and steady state response of the combination are investigated. The technique of artificial springs is used to simulate the coupling relationships between the adjacent substructures and boundary edges, and the specific coupling formulas between the adjacent substructures are presented. Then, an improved Fourier series is introduced for the displacement admissible functions of LOSPS, and the unknown coefficients of the displacement components are derived with the Rayleigh-Ritz method. The proposed method demonstrates convergence and good accuracy through numerical examples. Comprehensive vibration analyses are implemented to study the influence mechanism of key parameters, obtaining new results. This innovative work can serve as a reference for related research.
COMPOSITE STRUCTURES
(2022)
Article
Construction & Building Technology
Mohammad Mashhour, Mohammad Reza Barati, Hossein Shahverdi
Summary: In this study, the flutter characteristics of porous nanocomposite cylindrical shells, reinforced with graphene platelets (GPLs) in supersonic airflow, were investigated. Both uniform and non-uniform distributions for GPLs and porosities were considered. The effective material properties were determined using the Halpin-Tsai micromechanical model. A cylindrical shell formulation considering supersonic airflow was developed, and the governing equations were solved using Galerkin's method to obtain frequency-pressure plots. It was found that the flutter points of the shell were influenced by the amount, distribution of porosities and GPLs, as well as the shell's geometrical parameters.
STEEL AND COMPOSITE STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
Peng Zuo, Xianjie Shi, Renwei Ge, Jingrun Luo, Minliang Ning
Summary: This study presents a new meshfree approach for analyzing the thermal vibration characteristics of laminated composite cylindrical shells under arbitrary boundary conditions. The method employs the spectro-geometric method combined sine/cosine functions and Rayleigh-Ritz method to formulate the governing equation. The convergence and accuracy of the method are verified through numerical case studies, and the effects of temperature variable, boundary condition, length-radius ratio, and laminated layers on the thermal vibration characteristics are investigated.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2022)
Article
Engineering, Civil
Kai Zhou
Summary: This paper performs nonlinear dynamic analysis and vibration reduction of panel structures subjected to supersonic airflow using a negative capacitance piezoelectric shunt damping circuit (PSDC). The formulations for the nonlinear panel structure with attached piezoelectric element are derived based on the modified Ritz approach and energy approach. A unified mathematical model is formulated for the nonlinear dynamic analysis of composite panels subjected to general edge boundaries in supersonic airflow. Numerical cases are performed to verify the formulations and the vibration reduction properties of the present method are investigated.
THIN-WALLED STRUCTURES
(2023)
Article
Mechanics
Zhi-Guang Song, Feng-Ming Li
Article
Mechanics
Z. G. Song, L. W. Zhang, K. M. Liew
COMPOSITE STRUCTURES
(2016)
Article
Mechanics
Z. G. Song, L. W. Zhang, K. M. Liew
COMPOSITE STRUCTURES
(2016)
Article
Engineering, Multidisciplinary
L. W. Zhang, Z. G. Song, K. M. Liew
COMPOSITES PART B-ENGINEERING
(2016)
Article
Engineering, Multidisciplinary
Z. G. Song, L. W. Zhang, K. M. Liew
COMPOSITES PART B-ENGINEERING
(2016)
Article
Engineering, Multidisciplinary
L. W. Zhang, Z. G. Song, K. M. Liew
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2016)
Article
Engineering, Mechanical
Z. G. Song, L. W. Zhang, K. M. Liew
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2016)
Article
Engineering, Mechanical
Z. G. Song, L. W. Zhang, K. M. Liew
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2016)
Article
Engineering, Multidisciplinary
Yu-Yang Chai, Feng-Ming Li, Zhi-Guang Song
INTERNATIONAL JOURNAL OF NONLINEAR SCIENCES AND NUMERICAL SIMULATION
(2017)
Article
Nanoscience & Nanotechnology
Tianzhi Yang, Zhi-Guang Song, Eoin Clerkin, Ye-Wei Zhang, Jia-He Sun, Yi-Shu Su, Li-Qun Chen, Peter Hagedorn
Review
Materials Science, Multidisciplinary
Yuhan Sun, Yu Lu, Zhiguang Song
Summary: This paper reviews the historical processes and general theoretical framework of dynamic condensation and component mode synthesis, which are the most widely used methods of finite element (FE) model reduction technologies. It also summarizes the latest applications of these methods in the engineering field and briefly discusses the current bottlenecks and solutions found in literature. Finally, it gives a conclusion and brief prospects for future research.
ACTA MECHANICA SOLIDA SINICA
(2023)
Article
Chemistry, Analytical
Bin Yang, Xiangdong Ding, Jingkang Li, Jinyu Lai, Zhimin Zhang, Xiaohui Xu, Zhongling Liu, Zhiguang Song, Xinghua Wang, Bo Wang
Summary: Carboxylesterase-2 (CES2) plays a crucial role in the hydrolysis of various substances in the human body. This study developed a fluorescent probe, CHQ-E, for highly selective and sensitive detection of CES2. The probe demonstrated rapid response, excellent sensitivity, high binding affinity, and low cytotoxicity. Furthermore, it showed great potential for clinical diagnosis and evaluation of pharmaceuticals.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Engineering, Aerospace
Ruize Cui, Zefeng Wang, Zhiguang Song
Summary: This paper investigates the damage identification of rotor blades using a rotating cantilever beam model. Two methods, the fuzzy C-mean cluster analysis and the curvature of frequency response function, are used to identify the damages on the blades. The results show that the fuzzy C-mean method can determine whether there is damage, and the curvature method can determine the exact position of the damage.
INTERNATIONAL JOURNAL OF AEROSPACE ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
L. W. Zhang, Z. G. Song, Pizhong Qiao, K. M. Liew
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2017)
Article
Engineering, Multidisciplinary
Zhi-Guang Song, Feng-Ming Li
COMPOSITES PART B-ENGINEERING
(2017)
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)
