Article
Engineering, Mechanical
Xiaoqiang Niu, Fengxiang Xu, Zhen Zou
Summary: Bionic and gradient designs show promising applications in honeycomb structures, with finite element modeling approach being verified through formulas and experiments. Bionic honeycombs exhibit distinct force and displacement curves under medium- and low-speed impacts, and some even show negative Poisson's ratio. Multi-objective optimization design successfully increases the specific energy absorption and decreases the peak crushing force of the optimized graded INT_6.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2023)
Article
Polymer Science
Huan Hong, Menglei Hu, Liansong Dai
Summary: This paper utilized 3D printing technology to prepare resin honeycomb materials with different levels and studied their mechanical properties. The study revealed that multi-level hierarchical honeycomb (MHH) has better mechanical properties compared to single-level hierarchical honeycomb (SHH). Increasing the hierarchical level of honeycomb can improve the mechanical properties of the materials.
Article
Engineering, Mechanical
Konstantin Kappe, Klaus Hoschke, Werner Riedel, Stefan Hiermaier
Summary: This paper presents a multi-objective optimization procedure for effectively designing gradient lattice structures under dynamic loading. The aim is to maximize energy absorption characteristics and achieve a lightweight design. Through considering design variables such as the relative density and density gradient, the peak crushing force reduction and maximized specific energy absorption are simultaneously optimized. A simplified beam-based finite element model is used to efficiently model and simulate the lattice structures. An artificial neural network is trained to predict energy absorbing characteristics and find optimal lattice structure configurations. The network is trained using a multi response adaptive sampling algorithm, allowing parallel simulation with automatically generated finite element models. A multi-objective genetic algorithm is then used to find optimal combinations of design parameters for lattice structures under different impact velocities and cell topologies.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Mechanics
Yunyong Cheng, Junjie Li, Xiaoping Qian, Stephan Rudykh
Summary: The study showcases the enhanced mechanical performance and shape recovery ability of 3D-printed composite structures, highlighting the importance of incorporating continuous fibers to avoid catastrophic failure and activate shape memory effect. The reinforced honeycombs exhibit significantly improved properties, making them promising for applications in energy absorption, protection, biomedical devices, and actuators.
COMPOSITE STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
BingChen Xia, Xingyuan Huang, Lijun Chang, Ruotong Zhang, Zhikang Liao, Zhihua Cai
Summary: This study proposes a systematic method to optimize the arrangement pattern for 3D honeycomb and 3D re-entrant honeycomb structures in lattice design for energy absorption. A new sample multiplication method is introduced to gather sufficient training data and reduce time consumption by 93.75%. Simulations and experiments demonstrate that the proposed arrangement pattern significantly increases the energy absorption capacity by 43% in equivalent lateral deformation. Furthermore, the combination of different lattice structures and specific local arrangement patterns can alter their mechanical behavior and improve overall performance. This optimization unleashes the design potential of lattice structures and provides reference for future engineering applications.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Composites
Yu Long, Zhongsen Zhang, Cheng Yan, Zhen Huang, Kunkun Fu, Yan Li
Summary: This study presents a multi-objective optimization method to improve both the mechanical properties and printing efficiency of 3D-printed continuous flax-fibre-reinforced composites (CFFRCs). It was found that the printing efficiency of CFFRCs was remarkably improved by 40% without sacrificing the tensile strength of the composites when using the optimal processing parameters. This study provides an effective method to enhance the production efficiency of high-quality 3D-printed continuous fibre reinforced composites.
COMPOSITES COMMUNICATIONS
(2022)
Article
Mechanics
H. M. Abo-bakr, R. M. Abo-bakr, S. A. Mohamed, M. A. Eltaher
Summary: This research utilized multi-objective shape optimization method to optimize the shape and volume fraction distribution of functionally graded microbeams, for the first time, to maximize the critical buckling loads and fundamental frequencies while minimizing mass and cost. The modified continuum model based on Euler-Bernoulli beam theory and particle swarm optimization were used to derive equilibrium equations and equations of motion for the nonuniform microbeams. Multiple optimization problems were studied to demonstrate the multi-objective optimal shape design of these microbeams.
COMPOSITE STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Bradley Duncan, Robert D. Weeks, Benjamin Barclay, Devon Beck, Patrick Bluem, Roberto Rojas, Maxwell Plaut, John Russo, Sebastien G. M. Uzel, Jennifer A. Lewis, Theodore Fedynyshyn
Summary: In this study, low-loss graded dielectric materials were successfully designed and printed using active mixing of nanocomposite inks. This method enables the rapid fabrication of high-performance RF devices with locally tunable dielectric properties.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Mechanics
Fengxiang Xu, Kejiong Yu, Lin Hua
Summary: By establishing models and conducting optimization designs, this study demonstrates the advantages of sinusoidal NPR honeycomb structures in energy absorption performance, showing that they have better energy absorption performance than traditional honeycomb structures.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Manufacturing
Qian Zhou, Chenxi Qi, Tiantian Shi, Yuekun Li, Wei Ren, Shengyue Gu, Bei Xue, Fang Ye, Xiaomeng Fan, Lifei Du
Summary: This study proposes a honeycomb metamaterial absorber with a conductive coating, consisting of carbon fibers, carbon nanotubes and resin. The optimized absorber achieves over 90% absorption in the frequency range of 5.65 to 40 GHz, with a thickness of only 6 mm, indicating a relative bandwidth of 152.9% and a relative thickness of 0.107. The excellent performances are achieved through the synergy effect of the electric parameters of the composites and the geometry parameters of the honeycomb structure.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Mechanics
Rasha M. Abo-bakr, Rabab A. Shanab, Mohamed A. Attia
Summary: This paper proposes a multi-objective particle swarm optimization (MOPSO) algorithm integrated with a semi-analytical solution for lightweight design of bi-directional functionally graded beams. By searching for Pareto-optimal solutions, the algorithm effectively achieves the desired objectives. The accuracy and efficiency of the method are demonstrated through several optimization problems.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Multidisciplinary
Huan Jiang, Aaron Coomes, Zhennan Zhang, Hannah Ziegler, Yanyu Chen
Summary: By investigating the effects of graded designs on compressive mechanical performance of 3D printed architected polymer foams, it was found that hybrid foam exhibited significant enhancement in specific energy absorption and stiffness compared to uniform foam, graded binder foam, and graded thickness foam. The specific energy absorption and stiffness of the hybrid graded foam also outperformed lattice-based and shell-based graded foams. These findings provide a new avenue for engineering architected materials with enhanced mechanical properties for a wide range of applications.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Engineering, Mechanical
Leo de Waal, Guoxing Lu, Jianjun Zhang, Zhong You
Summary: Efforts to improve cellular structures in impact scenarios through the introduction of gradients in mechanical properties have shown promise. Origami techniques offer a convenient way to transform 2D sheets into 3D structures, with the ability to vary the crease pattern for graded topology. Experimental testing validated that origami honeycomb cores can exhibit similar advantages to traditional grading methods under dynamic loading, showing potential as an attractive alternative.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Engineering, Mechanical
Yuze Nian, Shui Wan, Mehmet Avcar, Ru Yue, Mo Li
Summary: The study introduces a new class of bio-inspired and 3D-printed metastructures called functionally graded lattice metamaterial beams (FGLBs), which offer several benefits including high stiffness-to-weight ratio and excellent energy absorption efficiency. The mechanical properties of these structures, reinforced with AL-FRP face sheets, are examined through experimental testing and finite element simulation. The study also explores the failure characteristics, deformation mode, and energy absorption of various 3D-printed graded metamaterial beam constructions, and identifies the impact of geometrical parameters and metamaterial core graded direction on the failure process and energy absorption.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Multidisciplinary
Youdong Xing, Siyi Yang, Shiqing Lu, Yukun An, Ertuan Zhao, John Zhai
Summary: In this study, a bidirectional corrugated honeycomb aluminum (BDCHA) material was designed with different thickness/cell size ratios and compression tests were conducted to analyze its mechanical properties, focusing on the plateau stage for energy absorption performance. Theoretical analysis and finite element simulation showed close agreement between the test and simulation results, with optimal structural parameters obtained through multiobjective optimization. The rationality and feasibility of BDCHA as a shock-absorbing filling material were demonstrated through the analysis of its mechanical properties.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Acoustics
Zhe Liu, Yunkai Gao, James Yang, Xiang Xu, Jianguang Fang, Furong Xie
Summary: The study introduces a multi-objective optimization framework for optimizing the dynamic performance of vehicle door design, by taking into account the dimensions of the main components of the door structure as design variables. Results show that the optimized framework can effectively reduce the acoustic pressure amplitude at the driver's right ear.
Article
Engineering, Mechanical
Jian Liu, Jun Li, Jianguang Fang, Yu Su, Chengqing Wu
Summary: Ultra-high performance concrete (UHPC) is a promising material in civil and military constructions to resist hazardous loads. This study reviews the research advances in UHPC targets to resist high velocity projectile impact (HVPI) and discusses the key factors in UHPC design, numerical simulations, and empirical formulae for predicting UHPC performance.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2022)
Article
Mechanics
Xiang Xu, Yong Zhang, Jianguang Fang, Xinbo Chen, Zhe Liu, Yanan Xu, Yunkai Gao
Summary: In this study, two novel foam-filled hierarchical structures (FSHT and FCHT) are proposed and their superior crashworthiness performance compared to traditional structures is validated. The energy absorption capability of these structures is investigated through theoretical solutions and design parameter analysis. The robust optimization method is employed to obtain more stable performance design parameters. The findings provide new directions for the design of energy-absorbing devices.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Multidisciplinary
Cunyi Li, Jianguang Fang, Chi Wu, Guangyong Sun, Grant Steven, Qing Li
Summary: In this study, a new phase field approach is proposed to analyze the fracture behavior of ductile materials by considering the effects of stress triaxiality and Lode angle, and incorporating phenomenological ductile fracture criteria. The effectiveness of the proposed models is demonstrated through numerical implementation and derivation of analytical homogeneous solutions, and their applicability is further validated through a wide range of stress state examples.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Engineering, Civil
Yong Zhang, Xiang Xu, Jianguang Fang, Wenzhen Huang, Jin Wang
Summary: This study develops a novel self-similar hierarchical triangular honeycomb (SHTH) and investigates its crushing mechanism and mechanical behaviors using experimental, numerical, and theoretical methods. The results demonstrate that hierarchical structures have significant advantages in improving deformation mode and crashworthiness of triangular honeycombs, and the relative density and hierarchy factor have significant effects on the mechanical performances of SHTHs. Furthermore, the SHTHs exhibit better crashworthiness in the X-direction and the crushing performances can be tuned by relative density and hierarchy factors.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Jian Liu, Jun Li, Jianguang Fang, Kai Liu, Yu Su, Chengqing Wu
Summary: The K&C concrete model was calibrated and validated for use in numerical simulations of UHPC structural members under impulsive loads. The calibrated model was verified through comparisons with static test results and used to simulate contact explosion tests on UHPC slabs. The proposed numerical model and simulation methodology are applicable for structural design when lacking sufficient static and dynamic test data.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Multidisciplinary
Yang Jiang, Cunyi Li, Chi Wu, Timon Rabczuk, Jianguang Fang
Summary: Crack-direction-based decomposition is used to control the propagation of cracks in a phase field modelling context. The proposed double-phase field model extends this strategy to complex crack modelling in a 3D setting with plastic deformation. The model accurately captures different crack modes and has been proven effective in solving complex 3D problems.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Engineering, Biomedical
Ali Entezari, Nai-Chun Liu, Zhongpu Zhang, Jianguang Fang, Chi Wu, Boyang Wan, Michael Swain, Qing Li
Summary: Despite advances in bone scaffold design optimization, their functionality remains suboptimal due to uncertainties caused by the manufacturing process. A novel multi-objective robust optimization approach is proposed to minimize the effects of uncertainties on the optimized design. This study presents the first non-deterministic optimization of tissue scaffold, shedding light on the significant topic of scaffold design and additive manufacturing.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Review
Engineering, Civil
Xiaojiang Lv, Zhi Xiao, Jianguang Fang, Qing Li, Fei Lei, Guangyong Sun
Summary: This paper provides a comprehensive review on the state-of-the-art assessments and design of frontal structures for protecting vulnerable road users (VRU). It evaluates impact-induced injury mechanisms of different body parts, compares safety regulations and assessment procedures for VRU protection, outlines experimental testing platforms for different VRU impacts, introduces virtual test systems, discusses various front-end structure designs for reducing VRU injuries, and reviews design optimization techniques and other protective measures for VRU.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Civil
Yiming Zhang, Hongyi Zhang, Lemiao Qiu, Zili Wang, Shuyou Zhang, Na Qiu, Jianguang Fang
Summary: Fail-safe robustness is important for critical structural systems. Existing fail-safe topology optimization methods optimize the worst-damage scenario, but this work proposes a computationally viable fail-safe topology optimization method that considers all possible damages according to severity. The proposed framework has been evaluated for the design of cantilever beams and airplane bearing brackets, showing improved robustness compared to deterministic designs.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Mechanical
Na Qiu, Jiazhong Zhang, Cunyi Li, Yijun Shen, Jianguang Fang
Summary: This study proposed a three-dimensional functionally graded TPMS structure to accommodate multi-directional loading conditions in real-life applications. The FG-3D Primitive (P) and Gyroid (G) structures showed higher energy absorption capacity compared to uniform counterparts, absorbing 45.3% and 12% more energy, respectively, under different loading directions.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Review
Engineering, Mechanical
Yaozhong Wu, Jianguang Fang, Chi Wu, Cunyi Li, Guangyong Sun, Qing Li
Summary: Lightweight materials and structures have been extensively studied for design and manufacturing of more sustainable products with reduced materials and energy consumption, while maintaining proper mechanical and energy absorption characteristics. Additive manufacturing techniques have offered more freedom for designing novel lightweight materials and structures, but the rational design for desired mechanical properties remains challenging. This review comprehensively discusses the recent advances in additively manufactured materials and structures, focusing on their mechanical properties and energy absorption applications. It also addresses challenges, future directions, and optimization techniques in this field.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Mechanical
Cunyi Li, Jianguang Fang, Yuheng Wan, Na Qiu, Grant Steven, Qing Li
Summary: This study aims to develop a phase field framework for simulating the complex mechanical behaviors of laser powder bed fusion printed metallic materials. By considering the microstructural orientation induced by laser powder bed fusion, transversely isotropic Hill48 and modified Mohr-Coulomb constitutive models are incorporated to describe plasticity and fracture behaviors respectively. The proposed phase field model is able to better reproduce force-displacement responses of all specimens by considering the stress state-dependent crack initiation. Moreover, applying a transversely isotropic fracture model is necessary to accurately predict the crack path and global force-displacement responses.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Review
Engineering, Civil
Ruyang Yao, Tong Pang, Bei Zhang, Jianguang Fang, Qing Li, Guangyong Sun
Summary: This article provides a comprehensive overview of recent advances in the development of thin-walled multi-cell structures and materials (TWMCSM) for crashworthiness and protection applications in various vehicles. It covers the classification of TWMCSM, commonly-used manufacturing methods, energy absorption mechanism and characteristics, experimental testing and numerical modeling techniques, key parameters affecting crashworthiness, analytical modeling methods, design optimization procedures, typical applications and future research directions. It aims to provide informative references and a comprehensive landscape for researchers and engineers in designing new TWMCSM for better energy absorption and crashworthiness.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Manufacturing
Chi Wu, Junjie Luo, Jingxiao Zhong, Yanan Xu, Boyang Wan, Wenwei Huang, Jianguang Fang, Grant P. Steven, Guangyong Sun, Qing Li
Summary: This study proposes a multiscale topology optimisation approach for additively manufactured lattice structures, utilizing a derivative-aware machine learning algorithm. The approach aims to optimize non-uniform unit cells and achieve a uniform strain pattern. The effectiveness of the framework is validated through experiments and practical applications, showcasing its potential in biomedicine.
ADDITIVE MANUFACTURING
(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)