Article
Materials Science, Multidisciplinary
Chao Gong, Yong Hu, Zhonghao Bai
Summary: In this study, a lotus-inspired bionic multi-cell tube (LBMT) is proposed based on the structural characteristics of lotus. The mean crushing force of LBMT is predicted using a theoretical model. The finite element model is established and validated with experimental tests. The results show that LBMT exhibits superior energy absorption behavior compared to traditional multi-cell tubes. Additionally, the impact of geometric parameters on crashworthiness behavior is investigated, and a multi-objective optimization is conducted to obtain the Pareto front. This study offers a novel approach to designing energy-absorbing devices with excellent crashworthiness behavior.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Ma Qi-hua, Dong Fan, Gan Xue-hui, Zhou Tianjun
Summary: This study proposes a rigid and flexible fiber-wrapped metal bionic hybrid structure, which utilizes fiber-reinforced composite for variable stiffness design and systematically investigates its crashworthiness. The optimized BH tube shows significant advantages compared to pure Al and CFRP tubes, providing valuable guidance for the design of new variable stiffness tubes.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Computer Science, Interdisciplinary Applications
Xihong Jin, Jun Lu, Weiyuan Guan, Guangjun Gao
Summary: This paper proposes a two-stage variable thickness expansion tube for the coupler system and investigates its crashworthiness performance through various tests and simulations. The study finds that the thickness variation and certain parameters have significant effects on specific energy absorption and crushing force efficiency. Furthermore, a multiobjective robust optimization process is developed to improve the reliability and performance of design optimization.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2022)
Article
Engineering, Mechanical
Emre Isa Albak, Erol Solmaz, Ali Riza Yildiz, Ferruh Ozturk
Summary: Inspired by the mechanical properties of graphene, the study focused on the design of graphene type multi-cell tubes. The best model, GTMT5, was determined using COPRAS and multiobjective optimization methods, showing that circular structures in multi-cell tubes have a significant impact on crashworthiness performance.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2021)
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, Mechanical
Weiyuan Guan, Yao Yu, Guangjun Gao
Summary: This study introduces a new type of combined splitting circular tube energy absorber for subway vehicles and demonstrates its excellent performance in dynamic crushing through experiments and numerical simulations. The results show high crush force efficiency and steady crushing forces of the combined splitting circular tube absorber. The numerical models validate the experimental findings, indicating superior crashworthiness of the absorber under eccentric loading.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Engineering, Mechanical
Yong Peng, Tao Li, Chonghua Bao, Jing Zhang, Guoquan Xie, Honghao Zhang
Summary: This paper analyzes and compares the performances of a bionic dendritic furcal structure (BDFS) with different cross-sections and partings inspired by the furcal branch and bifurcation structure of neurons through numerical simulation. The simplified super folding element theory and experiments verify the effectiveness of the finite element models. A hybrid multi-stage optimization decision system is proposed to find the optimal structure and obtain the optimal parameter alternative. Comparisons and analyses of experiments and simulations are carried out to verify the effectiveness of the proposed method. The results show that BDFS with six furcal ribs and 3rd-order parting display the best comprehensive crashworthiness under the working condition of 10 m/s specified in EN15227 standard.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Rui Liang, Na Liu, Xiang Liu, Tao Wei, Lirong Mo, Huanchao Huang, Christophe Bastien
Summary: This study presented the design, analysis, and optimization of bionic shrimp chela multi-cell tubes (BSCMTs) for bending applications. By incorporating the microstructure of arthropods into a thin-walled square structure, the energy absorption performance of the BSCMTs was evaluated through finite element modeling and physical tests. The results showed that the BSCMTs with a W-shape section exhibited the best energy absorption characteristics, making them potential candidates for vehicle B-pillar structures that require excellent energy absorption properties in high-speed impact collisions.
ACTA MECHANICA SOLIDA SINICA
(2023)
Article
Engineering, Marine
F. Djamaluddin
Summary: This study investigates the crashworthiness optimization design of a regular ship fender structure with varying cross section fenders. Eight new models of multi cell fenders are selected to determine the best crashworthiness performance. Non-linear finite element analysis using the explicit ABAQUS is conducted to calculate the crash performance. The research aims to optimize the crashworthiness indicators of fenders subjected to transverse loads using NSGA II and RBF. Simulation and optimization results reveal that fender model 4 exhibits the best performance, highlighting the need to consider altering the conventional fender design.
Article
Engineering, Civil
Emre Isa Albak
Summary: The crashworthiness of thin-walled structures combining multiple cells, corners, and edge-junctions has been examined in this study. Results show that the crash performance improves with an increase in the number of cells, and the finite element model validated for axial loading is predicted to be accurate for oblique loading as well. Various approximation and optimization methods have been utilized to obtain the best crash performance structure.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Mechanical
Yabin Deng, Yiru Ren, Xinwei Fu, Hongyong Jiang
Summary: This study proposed a novel structure, BBSTS, which demonstrated superior energy absorption performance under oblique crushing and revealed its complex reinforcement mechanisms. Parametric analysis was conducted to study the effects of bio-inspired joints with different thicknesses and angles on energy absorption characteristics.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Engineering, Mechanical
Lingyun Qin, Shuyi Yang, Hongzhou Li, Juchuan Dai, Guosheng Wang, Qihui Ling, Zhewu Chen
Summary: In this study, a bionic-shell thin-walled tube (BST) with excellent crashworthiness was constructed based on the structural bionic principle. The effects of structural parameters on the crashworthiness of the BST were investigated using finite element method. The optimized BST-6 exhibited superior energy absorption performance compared to the double circular tube (DCT) and the bionic-horsetail thin-walled tube (BHT), with increases in specific energy absorption and crushing force efficiency by 35.15% and 32.23%, respectively, compared to DCT.
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Multidisciplinary
Shaoqiang Xu, Weiwei Li, Lin Li, Tao Li, Chicheng Ma
Summary: This paper proposes two types of hierarchical multi-cell tubes inspired by the self-similarity of Pinus sylvestris to enhance structural energy absorption performance. Finite element models are established to validate the crashworthiness performance and a theoretical model for mean crushing force is derived. The results show that the bionic hierarchical thin-walled tubes exhibit improved energy absorption characteristics and deformation mode with the increase of hierarchical sub-structures. Additionally, the energy absorption performance of corner self-similar tubes is better than edge self-similar tubes. Multiobjective optimization is conducted using the response surface method and genetic algorithm, leading to the obtention of a Pareto front diagram. This research provides a new idea for the crashworthiness design of thin-walled structures.
CMES-COMPUTER MODELING IN ENGINEERING & SCIENCES
(2022)
Article
Engineering, Civil
Jin Xing, Jieliang Zhao, Qun Niu, Tianyu Zhang, Chenyang Zhang, Yuling Zhang, Wenzhong Wang, Shaoze Yan, Xiaonan Liu
Summary: This study aims to understand the structural properties of bamboo that allow it to maintain stability while being lightweight and flexible in strong winds, and apply the findings to develop an engineering tube. The research conducted image processing and analysis to observe the convex distribution along the radial direction of the fiber sheath area between bamboo nodes and its impact on bamboo's bending properties. A new bionic tube called BTGCs was introduced, and crashworthiness was investigated using the SSFE theory and computational simulations. The optimized BTGCs demonstrated superior crashworthiness compared to conventional tubes of equal mass, making them a potentially efficient design for engineering applications.
THIN-WALLED STRUCTURES
(2023)
Article
Materials Science, Composites
Weiwen Cai, Qihua Ma, Yazhe Wang, Xuehui Gan
Summary: This paper presents an experimental and numerical study on the crashworthiness of thin-walled Al/CFRP hybrid tubes with pre-existing transverse compression damage. It is found that initial damage has limited effect on the energy absorption capacity of hybrid tubes, but affects their deformation pattern and damage evolution. Finite element simulations explore the effect of different structural parameters on the crashworthiness of the hybrid tubes, and a multi-objective snake optimizer algorithm is proposed to obtain the optimum hybrid tube structure for multiple loading conditions.
POLYMER COMPOSITES
(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)