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
Engineering, Mechanical
Chao Gong, Zhonghao Bai, Yulong Wang, Linwei Zhang
Summary: This study introduces a novel hierarchical multi-cell tubes (NHMTs) design with superior crashworthiness performance compared to traditional multi-cell tubes (TMTs). The hierarchical level significantly affects the crashworthiness of NHMTs, and theoretical models accurately predict their energy absorption behavior.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(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
Materials Science, Multidisciplinary
Chao Gong, Zhonghao Bai, Yong Hu
Summary: This study proposes a novel multi-cell square tube and its hierarchical structures to improve the energy absorption efficiency of multi-cell thin-walled structures. The finite element model is built and validated with experiment results, and the theoretical model is derived and validated to predict the energy absorption behaviors. The results indicate that the novel multi-cell square tubes and its hierarchical structures exhibit superior crashworthiness performance than corresponding traditional multi-cell square tubes.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Yulong He, Tao Jin, Jiapeng Sun, Xin Li, Ji Qiu, Xuefeng Shu, Yajun Liu
Summary: This paper explores selfsimilar inspired multi-cell structures by replacing substructures according to different strategies. It investigates the effect of diameter, layout, and hierarchical order, and examines the tessellation and space-filling of these structures. The results demonstrate that specific energy absorption increases with hierarchical fractal order, and increasing side length is not an effective method for improving crashworthiness in lower-order multi-cell structures.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Civil
Zhipeng Gao, Dong Ruan
Summary: Inspired by the concept of hierarchy, this study proposes two types of hierarchical multi-cell square tubes (HMSA and HMSB) and numerically investigates their crashworthiness with different wall thicknesses and hierarchical orders. The results show that the peak crushing force of HMSA and HMSB tubes is smaller than that of single square tubes, which reduces the potential injury or damage. Moreover, the mean crushing force, energy absorption, crushing force efficiency, and specific energy absorption of HMSA and HMSB tubes increase with the hierarchical order and wall thickness.
ENGINEERING STRUCTURES
(2023)
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
Engineering, Mechanical
Zhipeng Gao, Hai Zhang, Jian Zhao, Dong Ruan
Summary: This paper investigates the enhanced crushing performance of bio-inspired hierarchical multi-cell hexagonal tubes (BHMH) through numerical analysis and theoretical prediction, showing improved peak crushing force and energy absorption compared to traditional hexagonal tubes.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Yue-Qing Shi, Rui-Xian Qin, Bing-Zhi Chen
Summary: In this study, four novel reinforced multi-corner columns (RMCs) were investigated and found to exhibit prominent crushing performances compared with other typical multi-cell tubes. The TOPSIS method and multi-objective optimization were utilized to find the best structure and its optimal design parameters, leading to an optimized column with excellent crashworthiness capacities for potential use as energy-absorbing components in engineering applications.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
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
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
Materials Science, Composites
Dong Fan, Ma Qi-hua, Gan Xue-hui, Zhou Tianjun
Summary: The study introduces a new design that improves the energy absorption performance of AL/CFRP hybrid thin-walled tubes by introducing induced circular holes, and conducts experiments and finite element simulations under different loading conditions. The induced hole effectively reduces peak load and enhances energy absorption characteristics of the hybrid tubes, showcasing potential for improved impact resistance in advanced energy absorbing devices.
POLYMER COMPOSITES
(2021)
Article
Mechanics
Zhipeng Gao, Fukun Xia, Jiahui Li, Dong Ruan
Summary: Two new types of hierarchical multi-cell hexagonal tubes were constructed and studied for their crashworthiness. The proposed tubes have smaller peak crushing force (PCF) compared to single hexagonal tubes with the same mass, indicating their ability to minimize sudden injury. The mean crushing force (MCF), energy absorption (EA), and specific energy absorption (SEA) of the proposed tubes increase with wall thickness and hierarchical order. The SEA of the 3rd order is over 200% of that of single hexagonal tubes with the same mass. The second type of hierarchical tubes with relatively uniformly distributed hierarchical cells exhibit slightly higher SEA than the first type with cells along the edges. The theoretical model for the first type of hierarchical tubes was further developed and validated, showing good agreement with numerical simulation.
COMPOSITE STRUCTURES
(2023)
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, Electrical & Electronic
Reza Sistani, MahmoudMousavi Mashhadi, Younes Mohammadi
Summary: In this study, the strengthening of a single regular hexagonal tube under a dynamic axial load with three different geometrical shapes is investigated. Crashworthiness indicators from the finite element code LS-DYNA are used to compare the results and select the appropriate section of a multi-cell hexagonal tube under dynamic axial load. An idea of variable thicknesses for certain parts of the selected section is proposed to improve crashworthiness criteria. Numerical tests are performed based on a lattice made of combinations with different variable thicknesses, and optimization is conducted to find optimum combinations of thicknesses. The results demonstrate improvement in the crashworthiness indicators compared to optimization with constant thicknesses.