Article
Engineering, Civil
Xinhang Zhi, Yuanqing Wang, Ying Zhang, Beibei Li, Yuanwen Ouyang
Summary: This paper investigates the local buckling performance of 7075-T6 high-strength aluminium alloy extruded H-section stub columns. Experimental tests and finite element analysis are conducted to evaluate the accuracy of current design standards for different cross-section shapes of stub columns and propose an improved design approach.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
Evangelia Georgantzia, Michaela Gkantou, George S. Kamaris
Summary: This paper examines the structural performance of aluminium alloy C-sections under axial compression and proposes an improved design method. Through experimental and numerical investigations, accurate performance data are obtained and the accuracy of existing design provisions is evaluated. The research findings are of great significance for improving the design accuracy of aluminium alloy structural members.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Civil
Ji-Hua Zhu, Zi-qi Li, Mei-Ni Su
Summary: Aluminium alloys are popular in structural engineering due to their high strength, low weight, and durability; however, their mechanical properties are significantly affected by high temperatures. This study investigates the behavior of aluminium alloy channel section columns at elevated temperatures through numerical analysis, parametric study, and reliability analysis.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Civil
Qiu-Yun Li, Ben Young
Summary: This study investigated the buckling behavior and loading capacity of cold-formed steel (CFS) built-up section members under axial compression through a thorough test program and numerical simulation. The results showed that the current design rules for CFS built-up section members were generally conservative and scattered in predicting resistance, leading to proposed modifications of the codified DSM equations for more reliable strength predictions.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
Zhaoyu Xu, Genshu Tong, Lei Zhang, Yong Guo
Summary: The research investigates the behavior and design method of 7A04-T6 high-strength extruded aluminium alloy lipped angle columns in axial compression through experiments and finite element simulations. The study shows that existing design methods generally provide accurate predictions for columns failing in flexural buckling, while Eurocode 9 (EC9) gives more accurate predictions for torsional-flexural buckling. Other design rules tend to be more conservative in predictions for this type of buckling.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
Zhaoyu Xu, Genshu Tong, Lei Zhang, Yong Guo
Summary: The behavior and design method of high-strength extruded aluminum alloy lipped angle columns in axial compression were investigated. Compressive tests and finite element (FE) modeling were conducted to predict the ultimate compressive strengths of the columns. The results were compared with existing design codes, and the Eurocode 9 generally provided more accurate predictions for torsional-flexural buckling.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
Jinzhi Wu, Jianhua Zheng, Guojun Sun
Summary: This study investigates the hysteretic performance of H-section 6061-T6 aluminium alloy members under cyclic and eccentric loading, finding that plastic local buckling controls the failure mechanism and leads to stiffness degradation and fracture failure. The finite element simulation method effectively verifies the model and the constitutive relationship of aluminium alloy. Additionally, an analysis of parameters shows that increased slenderness ratio and eccentricity weaken the energy consumption capacity and bearing capacity, providing valuable insight for seismic design of aluminium alloy structures.
THIN-WALLED STRUCTURES
(2021)
Article
Nanoscience & Nanotechnology
P. Hidalgo-Manrique, S. Cao, H. R. Shercliff, R. D. Hunt, J. D. Robson
Summary: In the process development trial, two identical automotive parts were formed from commercial 6082 Al alloy using Hot Form Quench (HFQ). The study compared microstructures and hardness at different locations in the parts, finding that the HFQ process did not result in a loss of hardening potential and that microstructures converged after artificial aging. Tensile tests showed that ductility and failure mechanism were insensitive to small differences in grain boundary microstructure observed in the HFQ component.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Construction & Building Technology
Ngoc Hieu Pham, Cao Hung Pham, Kim J. R. Rasmussen
Summary: The study investigated global buckling of cold-rolled aluminium alloy channel beam members through four-point bending tests, revealing interactions between different buckling modes. Finite element models were developed to simulate the behavior and ultimate buckling capacities of the members. The experimental results laid the foundation for further parametric studies and proposing new design rules.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2021)
Article
Chemistry, Physical
Hao Wu, Mark Porter, Richard Ward, Justin Quinn, Cormac McGarrigle, Shaun McFadden
Summary: Friction drilling is a non-conventional hole-making process suitable for thin-section, ductile metals. In this study, threaded holes were created using friction drilling and thread forming. The mechanical properties of the threaded holes were compared under different rotation speeds, and it was found that the optimum range of rotation rate for achieving higher load-bearing capacities is 3000-3500 rpm.
Article
Engineering, Civil
Hao Wang, Pengcheng Li, Bin Jian, Lei Meng
Summary: The study uses lightweight and recyclable aluminium alloy to form a cable-stiffened aluminium alloy column, investigating its buckling resistance. By numerically examining linear buckling behaviors and calculating crossarm lengths, the study provides insight into the stability behaviors of the cable-stiffened aluminium alloy column in comparison to those fabricated from steel.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Civil
Xianlei Cao, Yunxu Chen, Hangfei Wang, Chao Cheng, Xuejun Zhou, Haitang Zhang, Seung-Eock Kim, Zhengyi Kong
Summary: This study investigates the buckling behavior of high strength steel (HSS) welded T-section column reinforced with carbon fiber reinforcement polymer (CFRP) through experimental and numerical analysis. The influences of CFRP layers, column slenderness, and plate width-to-thickness ratio are observed, and it is found that CFRP effectively delays local buckling and torsional buckling. CFRP layer and column slenderness significantly affect the bearing capacity, and columns strengthened with CFRP exhibit smaller flexural and torsional displacement. A finite element method using ANSYS software is developed to estimate the bearing capacity, and a more accurate model is proposed for 800 MPa HSS T-section column reinforced with CFRP.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Civil
Lin Yuan, Qilin Zhang, Yuanwen Ouyang
Summary: This study examined the design of high-strength aluminum alloy members and analyzed the effects of different material properties and imperfections on the flexural buckling behavior of columns. A new flexural buckling curve was suggested for estimating the flexural buckling resistance of high-strength extruded members.
Article
Construction & Building Technology
Gang Sun, Xiao-Yong Sun, Jian-Hang Fu
Summary: Two types of high-strength aluminium alloy (HA)-namely, AA-6086 and 7075-T6-have been developed and extensively used in recent years. These alloys provide advantages over traditional alloys in terms of lower prices and higher yield strength. However, there is a lack of research on the web buckling performance of high-strength aluminium alloy channel sections subjected to end-two-flange (ETF) loading, and the material characteristics of these alloys differ significantly from conventional alloys. This study addresses this gap by conducting a detailed numerical investigation.
Article
Engineering, Civil
Jinzhi Wu, Jianhua Zheng, Guojun Sun, Xinquan Chang
Summary: This paper investigates the hysteretic performance of H section 6061-T6 aluminum alloy members under cyclic and axial loads. The experimental results show that overall buckling and local buckling play important roles in the failure of the members. The slenderness ratio and bending direction have significant effects on the bearing capacity and stiffness degradation of the members. In addition, a finite element model is established and parameter analysis is conducted. The section size and boundary condition of the member greatly influence the stiffness degradation and energy dissipation capacity.
STRUCTURAL ENGINEERING AND MECHANICS
(2022)
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)