Article
Engineering, Civil
Ruixian Qin, Xi Wang, Feng Gao, Bingzhi Chen
Summary: This study introduced a novel multi-cell hierarchical hexagon honeycomb structure by changing the topological connection, which enhances energy absorption efficiency and crashworthiness performance. Optimization of wall thickness and length coefficient can improve specific energy absorption and decrease peak crushing force, leading to superior crashworthiness performance. The optimal geometric parameters of the HHHS show significant enhancement and energy absorbing potential, making it a suitable choice for energy absorption considering the balance between crashworthiness and cost.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Civil
S. K. Tak, M. A. Iqbal
Summary: The finite element computations were used to study the axial compression behavior of thin-walled metallic tubes under quasi-static and dynamic loading conditions in this research. Different geometric shapes of tubes demonstrate varied energy absorption and deformation characteristics under different loading conditions.
THIN-WALLED STRUCTURES
(2021)
Article
Acoustics
Jiehao Chen, Xifeng Liang, Ping Xu, Shuguang Yao
Summary: This study investigates the application of a windowed design in a thin-walled structure to enhance its crashworthiness. Two types of windowed designs are introduced into different regions to form a multi-cell windowed structure, and its crashworthiness under dynamic impact is studied. Results show that the use of a windowed multi-cell structure improves the crashworthiness response, and the windowed design affects the structural deformation mode.
SHOCK AND VIBRATION
(2022)
Article
Computer Science, Interdisciplinary Applications
T. N. Tran, Ahmad Baroutaji, Quirino Estrada, Arun Arjunan, HuuSon Le, N. P. Thien
Summary: The paper proposes windowed shaped cuttings to reduce the high PCL of multi-cell structures and seeks optimal crashworthiness design through systematic investigation. Results show that the wall-to-wall connection type is more effective for standard tubes, while less favorable for windowed tubes.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2021)
Article
Engineering, Civil
Yuan Wang, Zeliang Liu, Chenglin Tao, Wei Yu, Xi Liang, Rui Zhao, Ying Hao, Yintang Wen, Bo Liang, Huijian Li
Summary: Gradient structures with excellent crashworthiness have been investigated in this paper. A novel biologically inspired functionally graded lattice-filled tube (FGLT) is proposed by combining a radial gradient lattice with a thin-walled structure. Experimental results show that the lattice-filled tubes have higher specific absorption energy compared to empty tubes, and the graded grating filled tubes have the highest specific absorption energy and the lowest peak load. Multi-objective optimization is conducted to obtain the best structure with maximum specific energy absorption and minimum peak load using response surface methodology and genetic algorithm. The functional gradient bionic structure provides new ideas for the design of more effective energy absorption structures and collision avoidance systems.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Mechanical
Yansong Li, Dayong Hu, Zhenyu Yang
Summary: A novel bio-inspired multicell tube (UCGS) mimicking the structure of glass sponge was fabricated and analyzed for its crash worthiness. The results showed that UCGS had higher specific energy absorption (SEA) than conventional multi-cell tubes and other bio-inspired tubes. The influence of geometric parameters and hierarchical designs on the energy absorption performance were investigated. A theoretical model was proposed to predict the mean crushing force and was in good agreement with the numerical results. This study provides insights for designing and optimizing energy absorbers with high performance.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Marine
Amir Najibi, Payman Ghazifard, Jahangir Torkian
Summary: This paper studies the multi-objective crashworthiness optimization of new multi-corner cross-section tubes. Finite element simulations validated by experiments are used to analyze the force and energy absorption-displacement of different cross-section specimens. The results show that optimization of these sections can lead to higher crashworthiness abilities without increasing cost and production difficulties.
SHIPS AND OFFSHORE STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Yong-jing Wang, Zhi-jia Zhang, Rui-xuan Feng
Summary: The aim of this study was to investigate the crashworthiness performance of novel plate-lattice structural material-filled multilayer square tube (PL-ST), which are fabricated 3D printing. It was found that the peak strength and energy absorption of PL-STs are higher than those of plate-lattice structural material (PL) and square tube (ST). Especially, PL-ST increases the specific strength by 103-118% and 36-778%, relative to ST and PL, respectively. The energy absorption per unit mass EM and per unit volume EV by 208-374% and 405-1193%, relative to ST, respectively, whilst by 40.2-576% and 193-1082%, relative to PL, respectively. Furthermore, the reinforcement mechanism is that the instability of PL and STs are limited or delayed by mutual enhancement between constituents, resulting in elevating the crashworthiness performance and the specific energy absorption of PL-STs.
Article
Mechanics
Tamer A. Sebaey, Dipen Kumar Rajak, Hassan Mehboob
Summary: Fiber reinforced plastics filled with polyurethane foam are widely used as energy absorbers for safety enhancement. The study found that using PU foam inside CFRP composite tubes increases peak load and energy absorption, while internal CFRP reinforcements do not significantly improve energy absorption but do improve peak load.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Civil
Yao Yu, Xiaobo Gong, Jialin Li, Guangjun Gao, Jian Li
Summary: This paper presents a novel multi-cell tube energy absorption structure made of aluminum alloy for ultra-large energy absorption field. The proposed structure has the advantages of low cost, large size, light weight, high energy absorption capacity, and large crushing force. Experimental and simulation results demonstrate its feasibility and superior performance. This structure can be applied to ultra-large energy absorption fields such as train crashworthiness protection.
Article
Materials Science, Multidisciplinary
Yuze Nian, Shui Wan, Peng Zhou, Xiao Wang, Robert Santiago, Mo Li
Summary: This study evaluates the potential use of functionally graded lattice-filled composite beams and finds that they absorb more energy but yield larger crushing force compared to uniform counterparts. Various parameters have a significant impact on the crashworthiness of the structure, and multi-objective optimization results in superior Pareto solutions.
MATERIALS & DESIGN
(2021)
Article
Engineering, Civil
Hongyong Jiang, Yihao Wang, Yiru Ren
Summary: Controllable energy-absorption behavior of perforated CFRP tubes can be achieved by adhesively bonding CFRP patches, effectively reducing stress concentrations and middle-height fracture to improve EA.
THIN-WALLED STRUCTURES
(2022)
Article
Mechanics
Jianbo Chen, Eric Li, Qiqi Li, Shujuan Hou, Xu Han
Summary: In this study, a new type of energy-absorbing thin-walled tube with concave angles (CTSs) was proposed, with CTS3 demonstrating superior energy absorption capability compared to other tubes. Theoretical and numerical analyses predicted and evaluated the performance factors of CTS3, determining it as possessing the best energy absorption capacity.
COMPOSITE STRUCTURES
(2022)
Review
Engineering, Mechanical
R. Dubey, R. Jayaganthan, D. Ruan, N. K. Gupta, N. Jones, R. Velmurugan
Summary: This document reviews recent research on the mechanical properties of 6xxx series aluminium alloys and the crashworthiness of tubes made of these alloys. The review focuses on the material response at high strain rates and the structural response under quasi-static and dynamic loadings. It also discusses the effects of processing routes and heat treatments on the dynamic behavior of the alloys, as well as the correlation between material response and microstructural features.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Engineering, Mechanical
Tianhui Zhang, Zhifang Liu, Shiqiang Li, Jianyin Lei, Zhihua Wang
Summary: In this study, the dynamic response and energy absorption properties of an aluminum foam-filled sandwich circular tube under internal blast loading were investigated through experimental, theoretical, and numerical simulations. Different masses of spherical emulsion explosives were used in a series of blast experiments, revealing three axially deformed regions in the internal and external tubes. A theoretical explicit calculation method was developed to predict the internal blast response, while a 3D Voronoi algorithm-based FE model was developed to study the deformation mechanism. Both numerical and experimental results were consistent with the theoretical predictions. Additionally, the impact of various factors on the dynamic response and energy absorption properties was investigated, with the sandwich circular tube with negative gradient core showing the best anti-blasting performance among the gradient arrangement tubes.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Engineering, Environmental
Pragati A. Shinde, Abdul Ghani Olabi, Nilesh R. Chodankar, Swati J. Patil, Seung-Kyu Hwang, Mohammad Ali Abdelkareem
Summary: A highly conductive and redox-active nickel-cobalt intertwined cobalt-nickel carbide@carbon nanoarchitecture cathode has been developed for high-performance hybrid supercapacitors. The incorporation of metals in metal carbides enhances electronic states, reduces barriers in reaction kinetics, and improves redox-active species, leading to improved electrochemical performance. This approach shows the feasibility of using metals blended with metal carbides in future energy storage applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Nabila Shehata, Davidson Egirani, A. G. Olabi, Abrar Inayat, Mohammad Ali Abdelkareem, Kyu-Jung Chae, Enas Taha Sayed
Summary: Membrane-based technologies are considered effective methods for water and wastewater treatment to meet the increasing demand for clean water and minimize environmental impact. This study focuses on current membrane technologies and their contributions to sustainable development goals and the circular economy. In summary, membrane processes directly impact 15 out of 17 sustainable development goals.
Article
Energy & Fuels
Abdul Ghani Olabi, Hegazy Rezk, Mohammad Ali Abdelkareem, Tabbi Awotwe, Hussein M. M. Maghrabie, Fatahallah Freig Selim, Shek Mohammod Atiqure Rahman, Sheikh Khaleduzzaman Shah, Alaa A. Zaky
Summary: In this paper, a modified bald eagle search optimization algorithm is applied for the first time to determine the parameters of the triple diode model of perovskite solar cells. Experimental datasets of standard conditions and a modified PSC are considered, and the root mean square error is used as the cost function. A comparison with other optimization algorithms is conducted to prove the superiority of the modified bald eagle search optimization. Statistical analysis is performed, and the results demonstrate the lead of the recommended algorithm in identifying the parameters of the TDM for PSCs.
Article
Green & Sustainable Science & Technology
Malek Kamal Hussien Rabaia, Concetta Semeraro, Abdul-Ghani Olabi
Summary: This study provides two models for addressing the issue of photovoltaic waste management. The first model predicts the growth trend of photovoltaic waste using the Weibull distribution and socio-environmental decision-making factors, suggesting that 2030 is the best time to start waste management procedures. The second model is an optimization model that considers budget limitations and dismantling capacities, recommending an annual installation of 670 MW of new photovoltaic installations to achieve 50% of the country's consumption by 2030 and 100% by 2040. These models are flexible and beneficial for future improvements, results comparison, and the design of waste management centers or dismantling facilities.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Chemical
Hussam Jouhara, Amisha Chauhan, Valentin Guichet, Bertrand Delpech, Mohammad Ali Abdelkareem, A. G. Olabi, Jon Trembley
Summary: Researchers and industrialists are interested in cryogenic technologies due to the unique properties of materials at very low temperatures. This work discusses the recent progress and characteristics of cryogenic mediums in heat transfer applications. Liquid He and N2 are the most commonly used cryogenic mediums, with liquid He providing extremely low temperatures and liquid N2 being cost-effective and easily accessible. The single-phase application of cryogenic mediums is common, while two-phase applications are mainly seen in heat pipes. Cryogenic mediums are crucial for critical and niche applications in aerospace, superconductivity, advanced manufacturing, healthcare, and scientific research.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Review
Chemistry, Applied
Pragati A. Shinde, Qaisar Abbas, Nilesh R. Chodankar, Katsuhiko Ariga, Mohammad Ali Abdelkareem, Abdul Ghani Olabi
Summary: The development of clean and sustainable energy sources has gained significant attention due to increasing energy demands and environmental concerns. Supercapacitors (SCs) have attracted global attention as energy storage devices for electric vehicles, power support, and portable electronics. However, challenges such as low energy density and high cost hinder their introduction in industrial settings. This study analyzes the strengths, weaknesses, opportunities, and threats of SCs and presents future prospects and challenges for their development.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Green & Sustainable Science & Technology
Hegazy Rezk, A. G. Olabi, Mohammad Ali Abdelkareem, Abdul Hai Alami, Enas Taha Sayed
Summary: This study aims to improve biohydrogen production in membrane bioreactor by determining the optimal values of operating parameters. A robust ANIFS model is used for modeling and a honey badger algorithm is used for parameter estimation. The integration of ANFIS and HBA leads to a 7.22% increase in hydrogen production yield.
Article
Green & Sustainable Science & Technology
Hegazy Rezk, A. G. Olabi, Mohammad Ali Abdelkareem, Hussein M. M. Maghrabie, Enas Taha Sayed
Summary: Microbial fuel cells (MFCs) are eco-friendly devices that convert the chemical energy in wastewater into electrical energy using living microorganisms. This study aims to optimize the power output of yeast microbial fuel cells (YMFCs) by determining the optimal glucose concentration and glucose/yeast ratio. Fuzzy modeling and the marine predators' algorithm (MPA) were employed for this purpose. The results showed that the combination of fuzzy modeling and MPA outperformed the response surface methodology (RSM) approach in terms of modeling accuracy and power density improvement.
Editorial Material
Energy & Fuels
Abdul Ghani Olabi, Enas Taha Sayed
Summary: The rapid growth of fossil fuels has led to the need for controlling climate change in the near future. One proposed method is the development of efficient energy conversion devices, such as fuel cells. Fuel cells are environmentally friendly and can be fueled by green hydrogen or different biofuels. This editorial discusses the fundamentals of fuel cell operation and their applications in residential, transportation, and power generation sectors.
Article
Energy & Fuels
Hegazy Rezk, Abdul Ghani Olabi, Rania M. M. Ghoniem, Mohammad Ali Abdelkareem
Summary: The amount of energy harvested by a thermoelectric generator (TEG) depends on the temperature difference between its hot and cold sides. To ensure efficient operation of the TEG under varying conditions, a reliable maximum power point tracker (MPPT) is crucial. Fractional control with non-integer parameters allows for more precise and flexible control of the system. This paper proposes an optimized fractional PID-based MPPT that addresses dynamic response and oscillation issues, outperforming other optimization algorithms and tracking methods.
Review
Energy & Fuels
Hussein M. Maghrabie, Abdul Ghani Olabi, Ahmed Rezk, Ali Radwan, Abdul Hai Alami, Mohammad Ali Abdelkareem
Summary: Recently, water desalination has become crucial for supplying drinking water in many countries. Desalination systems now rely on renewable energy resources such as geothermal, solar, tidal, and wind power. However, the intermittent nature and changeable intensity of renewable energy have limited their wide applications, leading to the introduction of energy storage systems in the desalination process. This work provides a comprehensive review of desalination methods and technologies, as well as the concepts of both thermal and electrical energy storage. The integration of energy storage with water desalination systems based on renewable energy offers better economic and environmental performance compared to conventional desalination systems, ensuring a constant supply of fresh water throughout the day.
Article
Green & Sustainable Science & Technology
Hegazy Rezk, Abdul Ghani Olabi, Enas Taha Sayed, Samah Ibrahim Alshathri, Mohammad Ali Abdelkareem
Summary: The main objective of this study is to increase the COD and TOC removal efficiencies in saline wastewater treatment using artificial intelligence and modern optimization. Firstly, an accurate model based on ANFIS was established to simulate the electrochemical oxidation process. Secondly, the optimal values for reaction time, pH, salt concentration, and applied voltage were determined using the hunger games search algorithm. Under these optimal conditions, the maximum removal values for COD and TOC were 97.6% and 69.4% respectively.
Article
Energy & Fuels
Tamer M. M. Abdellatief, Mikhail A. Ershov, Vsevolod D. Savelenko, Vladimir M. Kapustin, Ulyana A. Makhova, Mohammad Ali Abdelkareem, A. G. Olabi
Summary: A new parameter called the fuel merit function is proposed to rank various gasoline components additives based on changing fuel characteristics. The research findings reveal that the order of gasoline antiknocking is oxygenated compounds > aromatics > naphthenes > olefins > branched paraffins > normal paraffins. The merit function score for methanol is higher than other oxygenated compounds, and the score for prenol is higher than other olefinic components, isohexane has a higher score than other isoparaffinic components, and toluene has a higher score than other aromatic components. This ranking system enhances understanding of the relationship between engine performance and fuel properties, including octane rating. Promising gasoline blendstocks can be used as octane boosters in innovative fuel recipes.
Article
Thermodynamics
Concetta Semeraro, Haya Aljaghoub, Mohammad Ali Abdelkareem, Abdul Hai Alami, Michele Dassisti, A. G. Olabi
Summary: The integration of digital technologies has transformed traditional energy grids into intelligent grids. As a crucial component in the energy sector, the digital twin technology enables seamless integration of Battery Energy Storage Systems (BESS) into intelligent grids and offers various benefits such as fault identification, real-time monitoring, and optimization. This paper discusses the guidelines for developing a digital twin for a Li-ion BESS to optimize the system and facilitate early fault detection and diagnosis.
Article
Engineering, Chemical
Enas Taha Sayed, A. G. Olabi, Tabbi Wilberforce, Mohammed Al-Murisi, Kyu-Jung Chae, Mohammad Ali Abdelkareem
Summary: A standalone nickel sulfide electrode was prepared on the surface of nickel foam by hydrothermal ion exchange, which exhibited a highly porous nanosheet structure with high ethanol oxidation activity. The electrode showed high stability and excellent mass transfer properties, maintaining a constant current density of 100 mAcm(-2) at 0.5 V, which was two times that of Ni-layered double hydroxide and ten times that of nickel foam. The enhanced charge transfer of nickel sulfide and improved mass transfer of the highly porous nanosheet structure contributed to its superior activity.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(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)