Article
Engineering, Civil
Qingdong Chai, Yan Qing Wang
Summary: This paper presents a general approach for free vibration analysis of spinning JCCSs with arbitrary boundary conditions, utilizing Donnell's shell theory, artificial springs, and considering various forces. The frequency equations are derived using the Rayleigh-Ritz method, and the effectiveness of the approach is validated through numerical examples. The effects of key parameters on free vibration characteristics are also investigated.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Multidisciplinary
Emad Sobhani, Mehmet Avcar
Summary: The present research aims to examine the Natural Frequencies (NFs) of perfect and imperfect Graphene Nanoplatelet Reinforced Nanocomposite (GNPRN) structures of revolution under general boundary conditions. The study implements the graphene nanoplatelet material enhanced by a polymeric matrix including porosities. The equations of motion are found using Hamilton's principle and discretized using the Generalized Differential Quadrature Method (GDQM). Various benchmarks are addressed to verify the method.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2022)
Article
Engineering, Civil
Mohsen Rahmani, Younes Mohammadi
Summary: This paper investigates the vibration behavior of two types of porous FG truncated conical sandwich shells under different boundary conditions based on an improved high order sandwich shells theory. The effects of geometrical parameters, temperature variations, and porosity on the fundamental frequency parameters are studied. It is found that increasing porosity volume fraction increases the fundamental frequency parameters, and adjusting geometric parameters and temperature can alter the fundamental frequency parameters of the sandwich structure.
STRUCTURAL ENGINEERING AND MECHANICS
(2021)
Article
Engineering, Civil
Daisuke Shiomitsu, Daisuke Yanagihara
Summary: This study investigates the influence of initial deflection shape on the ultimate strength of ring-stiffened cylindrical shells through analyzing 432 models. A new slenderness ratio is proposed for estimating strength based on the circumferential stress reaching yield stress, and theoretical formulas for ultimate strength are developed using this ratio.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Civil
Jiaxing Wang, Yan Qing Wang, Qingdong Chai
Summary: The study investigates the free vibration characteristics of a spinning functionally graded spherical-cylindrical-conical (FG-SCC) shell in athermal environment, and analyzes in detail the factors affecting the free vibration characteristics.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
Peng Zuo, Xianjie Shi, Renwei Ge, Jingrun Luo
Summary: A unified solution method is established for analyzing the free, steady-state, and transient vibration of composite laminated joined conical-cylindrical shells under thermal environment. The use of artificial spring technology helps handle the boundary and continuity conditions, and the proposed approach is shown to be efficient through comparison with the finite element method solution.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
Dayuan Zheng, Jingtao Du, Yang Liu
Summary: A novel and unified solution is established to investigate the vibration characteristics of circular cylindrical shells with arbitrary variable thickness and general boundary conditions. The proposed model utilizes a modified Fourier series to construct the displacements of the shell structure and includes auxiliary terms to address differential discontinuity associated with elastic boundary restraints. The study found that thickness variation has a significant influence on the natural frequencies of cylindrical shells.
THIN-WALLED STRUCTURES
(2021)
Article
Mechanics
Hadi Vahidi, Ali Rahmani Hanzaki, Majid Shahgholi, Arash Mohamadi
Summary: The current study investigates the nonlinear vibration characteristic of rotating axially moving conical shell made of shape memory alloy (SMA). By applying suitable models and methods, the study derives nonlinear equations of motion and solves them using numerical techniques. The study also analyzes the influence of different phases, axial motion, and spinning on the conical shells made of SMA.
Article
Engineering, Multidisciplinary
Emad Sobhani
Summary: This study investigates the Natural Frequency Parameters (NFPs) of Fastened Spherical-Conical-Conical Shell (FSCCS) structures made of Nanocomposite Sandwich (NS) materials, considering different mechanical values and employing various approaches for different material layers.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Engineering, Multidisciplinary
Maysam Alinia, Reza Nopour, Mohammad Mohammadi Aghdam, Reza Hedayati
Summary: This study investigates the free vibration of conical shells with and without ring support, consisting of an auxetic core. The results indicate that the honeycomb interior angle and ring support significantly influence the natural frequency of the structure, with lower frequencies achieved as the interior angle increases.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Engineering, Civil
Lun Liu, Shupeng Sun, Jiajie Han
Summary: This paper analyzes the nonlinear traveling-wave vibration of a ring-stringer stiffened cylindrical shell by deriving a nonlinear dynamic model using Donnell's nonlinear shell theory and Lagrange equations. The study uses Galerkin's method based on multi-mode approximation, orthogonal circumferential modes, and harmonic balance method to solve the forced vibration responses of the shell. The research also investigates the effects of stiffener parameters on the nonlinear dynamic characteristics of the stiffened shell.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2021)
Article
Engineering, Mechanical
Xingzhuang Zhao, Peter Chang
Summary: This study focuses on the free and forced vibrations of the DBS-ISEL, providing analytical and numerical solutions. The asymptotic deflections of the two beams converge to static deflections in damped vibrations. The intermediate elastic support effectively modulates the deflections of the beams.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Mechanics
Emad Sobhani, Amir R. Masoodi, Amir Reza Ahmadi-Pari
Summary: In this paper, free vibration analysis of sandwich composite joined conical-cylindrical-conical shells is conducted using FSDT, reinforced with FG-CNTs and FG-GNPs. Different distribution patterns and boundary conditions are considered, with the GDQM method utilized to solve the PDE system. The correctness and efficiency of the proposed formulation are validated through comparison with reference solutions.
COMPOSITE STRUCTURES
(2021)
Article
Construction & Building Technology
Imene Harbaoui, Mohamed Amine Khadimallah, Abdelhakim Benslimane, Guoyong Jin, Omer Civalek
Summary: This paper presents a dynamic analysis of a prestressed stiffened circular cylindrical shell subjected to external distributed pressure using the dynamic stiffness method. The natural frequencies are easily processed and the dynamic stiffness matrix has been built. The vibration analysis with numerical examples shows that the proposed element has advantages in model size, computing time, accuracy, and precision compared to the finite element method.
STEEL AND COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Rasa Jamshidi, A. A. Jafari
Summary: This study investigates vibration reduction of a simply supported conical shell with distributed piezoelectric sensor and actuator layers. Different piezoelectric layer distributions were considered and a PD controller was used to reduce shell vibration. Results show that derivative controllers can affect natural frequencies more and circumferential distribution has more effects on the dynamic of the conical shell.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Mechanical
Kun Xie, Meixia Chen, Lei Zhang, De Xie
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2017)
Article
Engineering, Biomedical
Kun Xie, Meixia Chen, Zuhui Li
JOURNAL OF VIBROENGINEERING
(2017)
Article
Engineering, Civil
Kun Xie, Meixia Chen, Zuhui Li
THIN-WALLED STRUCTURES
(2017)
Article
Acoustics
Kun Xie, Meixia Chen
Review
Engineering, Marine
Meixia Chen, Lei Zhang, Kun Xie
Article
Engineering, Civil
Kun Xie, Meixia Chen, Wanjing Dong, Wencheng Li
THIN-WALLED STRUCTURES
(2019)
Article
Engineering, Mechanical
Zhiwei Zhou, Meixia Chen
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2019)
Article
Engineering, Marine
Kun Xie, Meixia Chen, Linke Zhang, Wencheng Li, Wanjing Dong
Article
Mathematics, Applied
Zhiwei Zhou, Meixia Chen, Kun Xie
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
(2020)
Article
Mechanics
Zhiwei Zhou, Meixia Chen, Wenchao Jia, Kun Xie
COMPOSITE STRUCTURES
(2020)
Article
Engineering, Civil
Kun Xie, Meixia Chen, Wencheng Li, Wanjing Dong
THIN-WALLED STRUCTURES
(2020)
Article
Engineering, Marine
Kun Xie, Meixia Chen, Wanjing Dong, Wencheng Li
Article
Engineering, Mechanical
Kun Xie, Meixia Chen
Summary: An analytical method was proposed to study free vibrations of functionally graded material (FGM) cylindrical shells with arbitrary intermediate ring supports. The method demonstrated high accuracy and wide application through comparison with appropriate values in the literature or finite element method (FEM) calculations. Analysis showed that natural frequencies are significantly affected by restraining displacements at ring supports, while mode shapes are mainly affected by radial displacements. Additionally, the natural frequencies of the FGM shell vary with the power-law exponent, but the mode shapes remain relatively unchanged.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2021)
Article
Acoustics
Wenchao Jia, Meixia Chen, Zhiwei Zhou, Kun Xie
Summary: A semi-analytical method is developed for vibration and acoustic analysis of a submerged ring-stiffened cylindrical shell coupled with arbitrary inner structures. The method disassembles the structure into cylindrical shell and inner structures, analyzes them separately, and combines their responses to obtain the vibro-acoustic equations of the coupled system.
Article
Acoustics
Kun Xie, Meixia Chen, Zuhui Li
JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME
(2017)
Article
Engineering, Civil
Jian Xue, Weiwei Zhang, Jing Wu, Chao Wang, Hongwei Ma
Summary: This study integrates a plate-type local resonator with varying free boundaries within a plate to convert the initial low-order global vibration modes into localized vibration modes. A novel semi-analytical method is proposed to analyze the free vibration of the plate with thickness and displacement discontinuities. The results show that by applying free boundary conditions, the low-order localized vibration frequencies can be significantly reduced without affecting the low-order global frequencies.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Merve Tunay
Summary: In recent years, there has been an increasing number of studies on the mechanical properties of sandwich structures manufactured with the Fused Deposition Modeling (FDM) method. However, there is still a lack of experimental data on the mechanical characteristics of FDM-manufactured sandwich structures under different thermal aging durations. In this experiment, the energy absorption capabilities of sandwich structures with different core geometries were investigated under various thermal aging durations. The results showed that the core topology significantly influenced the energy absorption abilities of the sandwich structures.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Zi-qin Jiang, Zi-yao Niu, Ai-Lin Zhang, Xue-chun Liu
Summary: This paper proposes a crosssection corrugated plate steel special-shaped column (CCSC) that improves the bearing capacity and overall stability of structural columns by using smaller material input. Through theoretical analysis and numerical simulation, the overall stability of the CCSC under axial compression is analyzed. The design method and suggestions for the stability of CCSC are put forward. Compared with conventional square steel tube columns, the CCSC has obvious advantages in overall stability and steel consumption.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Yong Zhang, Yangang Chen, Jixiang Li, Jiacheng Wu, Liang Qian, Yuanqiang Tan, Kunyuan Li, Guoyao Zeng
Summary: A hybrid TPMS method was proposed to develop a new TPMS structure, and the mechanical properties of different TPMS structures were studied experimentally and numerically. Results showed that the hybrid TPMS structure had higher energy absorption and lower load-carrying capacity fluctuation. Further investigations revealed that the topological shape and material distribution had significant influence on mechanical properties, and the hybrid additive TPMS structure exhibited significant crashworthiness advantage in in-plane crushing condition.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Tongfei Sun, Ye Liu, Kaoshan Dai, Alfredo Camara, Yujie Lu, Lijie Wang
Summary: This paper presents a series of experimental and numerical studies on the performance of a novel double-stage coupling damper (DSCD). The effects of damper configuration, friction-yield ratio (Rfy), and loading protocol on the hysteresis performance of the DSCD are investigated. The test results demonstrate that the arrangement of ribs in the DSCD increases its energy dissipation capacity. Numerical analysis reveals that the length of the friction mechanism and the clearance between the yield segment and the restraining system affect the energy dissipation and stability of the damper.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Jeonghwa Lee, Young Jong Kang
Summary: This study investigates the local buckling behavior and strength of I-shape structural sections by considering flange-web interactions through three-dimensional finite element analysis. The study provides a more reasonable estimation of local buckling strength by considering the ratio of flange-web slenderness and height-to-width ratio, and presents design equations for flange local and web-bend buckling coefficients.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Yizhe Chen, Wenfeng Xiang, Qingsong Zhang, Hui Wang, Lin Hua
Summary: This study investigates the surface modification of a nickel plate to improve the bonding strength with carbon fiber-reinforced plastics (CFRP). The results show that different surface modification methods, including sandblasting, coupling agent treatment, and compound coupling agent treatment, significantly enhance the bonding strength of CFRP/Ni joints. The research provides insights into improving the connection between nickel and CFRP, as well as other heterogeneous materials.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Agha Intizar Mehdi, Fengping Zhang, Moon-Young Kim
Summary: A spatial stability theory of mono-symmetric thin-walled steel beams pre-stressed by spatially inclined cables is derived and its validity is demonstrated through numerical examples. The effects of initial tension, deviator numbers, inclined cable profiles, and bonded/un-bonded conditions on lateral-torsional buckling of the pre-stressed beams are investigated, with a specific emphasis on the effects of increasing initial tension.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Teng Ma, Jinxiang Wang, Liangtao Liu, Heng Li, Kui Tang, Yangchen Gu, Yifan Zhang
Summary: The structural response of water-back plate under the combined action of shock wave and bubble loads at water depths of 1-300 m was numerically investigated using an arbitrary Lagrange-Euler method. The accuracy of the numerical model was validated by comparing with experimental and theoretical results. The influences of water depth and length-to-diameter ratio of the charge on the combined damage effect were analyzed. The results show that as water depth increases, the plastic deformation energy of the water-back plate decreases, and the permanent deformation mode changes from convex to concave. When the charge has a large length-to-diameter ratio, the plastic deformation energy of the radial plate is higher than that of the axial plate, and the difference decreases with increasing water depth. Increasing the length-to-diameter ratio enhances the combined damage effect in the radial direction in deep-water environments.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Qiu-Yun Li, Ben Young
Summary: This paper investigates the flexural performance of CFS zed section members bent about the neutral axis parallel to the flanges through experimental and numerical analysis. The results show that the current direct strength method generally provides conservative predictions for the flexural strength of unstiffened zed section members, but slightly unconservative design for edge-stiffened zed section beams. The nominal flexural strengths of zed section members with edge stiffeners were found to be underestimated by 17% to 21% on average. Modified DSM formulae are recommended for the design of CFS zed section beams.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Weinan Gao, Bo Song, Xueyan Chen, Guochang Lin, Huifeng Tan
Summary: This paper presents a precise method for predicting deformation in large-scale inflatable structures, utilizing finite element modeling and laser scanning technique. The study shows a good agreement between the predictive model and non-contact measurement results.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Fei Gao, Zongyi Wang, Rui Zhu, Zhenming Chen, Quanxi Ye, Yaqi Duan, Yunlong Jia, Qin Zhang
Summary: This research investigates the mechanical properties of high-strength ring groove rivet assemblies and the load resistances of riveted T-stubs. Experimental tests reveal that Grade 10.9 rivets have higher yield strength and strain, and lower ultimate strain, making them suitable for high-strength ring groove rivet connections. Increasing the rivet diameter benefits the T-stubs, while increasing the flange thickness is not always advantageous. The Eurocode 3 method is not suitable for T-stubs connected through ring groove rivets, while the Demonceau method is conservative.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Shangchun Jiang, Liangfeng Sun, Haifei Zhan, Zhuoqun Zheng, Xijian Peng, Chaofeng Lue
Summary: This study investigates the bending behavior of two-dimensional nanomaterials, diamane and its analogous structure TBGIB, through atomistic simulations. It reveals that diamane experiences structural failure under bending, while TBGIB bends elastically before undergoing structural failure. The study provides valuable insights for the application of these materials in flexible electronics.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Qiang Zhang, Jianian Wen, Qiang Han, Hanqing Zhuge, Yulong Zhou
Summary: In this study, the mechanical properties of Q690 steel H-section columns under bi-directional cyclic loads are investigated, considering the time-varying characteristics of corrosion. A refined finite element (FE) model is built to analyze the degradation of mechanical property and failure mechanisms of steel columns with different design parameters during the whole life-cycle. The study proposes a quantitative calculation method for the ultimate resistance and damage index of steel columns, taking into account the ageing effects. The findings emphasize the importance of considering the ageing effects of steel columns in seismic design.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Yuda Hu, Qi Zhou, Tao Yang
Summary: The magneto-thermo-elastic coupled free vibration of functionally graded materials cylindrical shell is investigated in this study. The vibration equation in multi-physical field is established and solved using the Hamilton principle and the multi-scale method. The numerical results show that the natural frequency is influenced by various factors such as volume fraction index, initial amplitude, temperature, and magnetic induction intensity.
THIN-WALLED STRUCTURES
(2024)