Article
Acoustics
Y. X. Hao, M. X. Wang, W. Zhang, S. W. Yang, L. T. Liu, Y. H. Qian
Summary: This paper investigates the bending-torsion coupling bursting oscillations of cantilever functionally graded materials sandwich conical panels under static and low-frequency harmonic excitation. It is found through numerical methods that the vibration mechanism is related to pitchfork bifurcation with symmetry breaking.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Construction & Building Technology
M. K. Khan, C. K. Lee, Y. X. Zhang
Summary: The study presents a comprehensive numerical parametric investigation on the axial compressive behaviors of ECC-CES columns, establishes a criterion for effective material stresses for FE modeling, validates FE analysis results against experiments, conducts a detailed parametric study on material strengths, geometric dimensions, and column scaling effects. Furthermore, practical design implications and the applicability of a squash load formula for predicting ultimate capacity are recommended and evaluated.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Engineering, Mechanical
Mao Yang, Bin Han, Peng-Bo Su, Zi-Han Wei, Qi Zhang, Qian-Cheng Zhang, Tian Jian Lu
Summary: This study investigates the vibration and load-carrying capacities of metallic sandwich-walled structures through experimental and numerical methods, and quantifies the influence of geometric parameters on their performance. A multifunctional design approach is also demonstrated to meet the requirements of high load-bearing capacity and low natural frequency constraints.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Chemistry, Physical
Sofiene Mellouli, Fatma Bouzgarrou, Talal Alqahtani, Salem Algarni, Kaouther Ghachem, Lioua Kolsi
Summary: This study proposes a new configuration of metal hydride (MH) - phase change material (PCM) composite disks, which improves the thermal performance and enhances the release rate and reaction rate of hydrogen by 37.68%. The geometrical parameters of the MH truncated cone and the heat transfer model are optimized to achieve this enhancement.
Article
Engineering, Civil
X. Li, X. C. Chen, W. T. Jiang
Summary: This paper investigates the dynamic stability of graded graphene reinforced truncated conical shells under periodic spinning speeds and axial loads, taking into account thermal effects. The results demonstrate that the parameters of the graphene platelets, temperature variation, spinning speeds, and axial loads significantly influence the dynamic stability of the conical shell, and thermal expansion deformation and thermal conductivity are also important factors in the analysis of dynamic stability.
ENGINEERING STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Nasser Firouzi, Sayyed Roohollah Kazemi
Summary: This paper investigates the enhancement of vibration suppression of thick beams. By adding extra boundary conditions, the stability of the beam is increased. Moreover, considering the thick beam reveals that the equivalent damping of the beam enhances, resulting in an increase in excitation amplitude and frequency, and thus improving the stability of the beam.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Review
Mathematics, Applied
Suthep Suantai, Muhammad Aslam Noor, Kunrada Kankam, Prasit Cholamjiak
Summary: The forward-backward algorithm is a splitting method for convex minimization problems, widely applicable in various fields. By incorporating linesearch technique, new forward-backward algorithms are introduced to efficiently solve unconstrained and constrained convex minimization problems, with discussions on convergence and optimal parameter selection.
ADVANCES IN DIFFERENCE EQUATIONS
(2021)
Article
Engineering, Civil
X. Li, W. T. Jiang, X. C. Chen
Summary: This article focuses on the parametric instability of FG-GPL reinforced truncated conical shells under mechanical and thermal loading conditions. The effects of rotation, dynamic loads, and thermal expansion on the dynamic stability of these shells are investigated using theoretical analysis and the method of multiple scales. The study provides insights into the instability regions and vibration characteristics of the conical shell.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2022)
Article
Engineering, Mechanical
Sanjay Kumar Raj, Bamadev Sahoo, Alok Ranjan Nayak, L. N. Panda
Summary: In this study, the nonlinear dynamics of an axially accelerating viscoelastic beam on a pully mounting system were analyzed. The integro-partial differential equation of motion for the simply supported beam was solved analytically using the direct perturbation method of multiple time scales. The results revealed the influence of support stiffness parameter on the stability and bifurcation of the beam, as well as the impact of other parameters on the dynamic characteristics of the system.
NONLINEAR DYNAMICS
(2023)
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)