Article
Engineering, Civil
Zhipeng Gao, Hai Zhang, Jian Zhao, Ying Zhang, Dong Ruan
Summary: In this study, thin-walled aluminum square tubes with different wall thickness configurations were experimentally compressed at various loading angles. Numerical analysis was also conducted to investigate the effects of wall thickness, thickness configuration, and loading angle on the deformation mode and energy absorption of the tubes. The results showed that tubes with opposite walls of different thicknesses exhibited better energy absorption performance under oblique loading, while tubes with opposite walls of the same thickness absorbed the most energy at larger angles.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Civil
Hai Zhang, Zhipeng Gao, Dong Ruan
Summary: The mechanical performance of square tubes with in-plane graded wall thickness under oblique compression has been investigated for the first time in this study. Experimental results show that both single-surface graded wall thickness (SSG) and double-surface graded wall thickness (DSG) tubes display better specific energy absorption than tubes with uniform thickness under oblique compression.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Civil
Jiangping Huang, Kai He, Rongqiang Liu, Chuang Shi
Summary: This paper investigates the energy absorption performance of multi-cell tubes and develops a method for predicting the mean crushing load through numerical simulation and theoretical validation.
THIN-WALLED STRUCTURES
(2022)
Article
Chemistry, Physical
Weiwei Li, Zhaohui Li, Suhang Li, Peng Wang
Summary: Under axial compression, multi-cell tubes are more effective than single-cell tubes. Regular hexagonal multi-cell tubes (HMT) are found to have higher energy absorption efficiency compared with conventional thin-walled tubes. Increasing the number of triangular cells can further improve the mean crushing force and specific energy absorption of the multi-cell tubes.
Article
Chemistry, Multidisciplinary
Kadir Gunaydin, Aykut Tamer, Halit Suleyman Turkmen, Giuseppe Sala, Antonio Mattia Grande
Summary: The research investigated the energy absorption characteristics of chiral auxetic lattices filled cylindrical composite tubes under uniaxial and lateral quasi-static loads, finding that the energy absorption capability for axial quasi-static crushing decreased compared to hollow composite design, while the average energy absorption value in lateral loading significantly increased.
APPLIED SCIENCES-BASEL
(2021)
Article
Polymer Science
J. J. N. Amelia, M. Y. M. Zuhri, Z. Leman, N. I. Zahari, A. As'arry, R. A. Ilyas
Summary: The aim of this study was to investigate the compression strength and energy absorbing capability of PVC and bamboo tubes reinforced with foam. The results showed that increasing foam density led to an increase in compression strength and specific energy absorption values. Introducing multiple tubes into the foam significantly increased compression strength, while specific energy absorption remained almost the same. The influence of crosshead speed below 20 mm/min did not vary significantly for both compression strength and specific energy absorption.
Article
Materials Science, Multidisciplinary
Qiang Wang, Shiqiang Li, Zhifang Liu, Guiying Wu, Jianyin Lei, Zhihua Wang
Summary: A new prefolded tube is proposed by incorporating web into a thin-walled tube based on Miura origami, which exhibits excellent energy absorption capacity and low initial peak force.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Engineering, Civil
Jingkun Hu, Peng Xu, Zhiqiang Fan, Yaozhou Li, Xiaoli Tan
Summary: Inspired by the veins of leaves, a new bionic multi-cell tube (BMT) with secondary ribs was constructed. The effects of impact velocity and secondary rib shape on structural deformation and energy absorption were studied using quasi-static compression and numerical simulation. The results showed significant improvement in energy absorption and mean crushing force with the introduction of secondary ribs, as compared with traditional multi-cell tubes (MT). A theory for predicting the mean crushing force of bionic multi-cell tube was also developed and validated with high prediction accuracy.
THIN-WALLED STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Mao Yang, Bin Han, Pengbo Su, Feihao Li, Zhongnan Zhao, Qi Zhang, Qiancheng Zhang, Zhenjun Hong, Tian Jian Lu
Summary: Through experimental and numerical analysis, it was found that metallic truncated conical sandwich shells with corrugated cores exhibit higher energy absorption and lower peak force under oblique compression, especially when the semi-apical angle is set around 10 degrees to 15 degrees. These results provide valuable guidance for the application of truncated conical sandwich tubes in protective engineering.
MECHANICS OF ADVANCED MATERIALS AND 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
Sheng Huo, Zhanyuan Gao, Dong Ruan
Summary: This study investigates the crashworthiness of a hybrid tube consisting of an auxetic tube as the outer tube and a conventional tube as the inner tube. The effects of outer tube material and geometry on the deformation mode, force-displacement curve, and energy absorption of the hybrid tubes are discussed.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Electrical & Electronic
Konstantina D. Karantza, Ioannis G. Papantoniou, Stavros S. A. Lykakos, Dimitrios E. Manolakos
Summary: The study investigates the crashworthiness behavior of thin-walled circular steel tubes under axial and oblique crushing. Parametric analysis shows that increasing crushing angle leads to decreased energy absorption and peak force. Low-angled oblique loading is found to be the most efficient impact condition, achieving sufficient energy absorption and facilitating plastic collapse initiation. Additionally, higher wall thickness results in greater peak force and increased critical angle, preventing unstable deformation mode and providing smoother decrease of energy absorption with respect to loading angle.
Article
Mechanics
Xiaolong Zhang, Huanan Hao, Ruilan Tian, Qiang Xue, Huaitong Guan, Xinwei Yang
Summary: In this work, a novel auxetic metamaterial with enhanced energy-absorption performance is proposed. The study investigates the quasi-static compression and dynamic crushing behaviors of the vertical strut combined auxetic metamaterial through simulation and theoretical analysis. The results show that the material exhibits a hierarchical deformation mode and possesses higher mean plateau stress and specific energy-absorption compared to other structures.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Mechanical
Seyed Mohammad Hossein Mirbagheri, Mina Salehi
Summary: This article investigates the quasi-static compressive behavior and drop weight impact tests of aluminum foam-filled tubes. The results show that the NE curves in dynamic tests were cyclic, whereas in static tests they were asymptotic non-linear. The study also found that CE and NE energies were more effective in recognizing plastic deformation and crushing behavior than SEA energy.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2022)
Article
Engineering, Civil
Jianxun Zhang, Jinlong Du, Fuxing Miao, Haoyuan Guo
Summary: This paper studies the large deflection of the slender circular metal foam-filled tube under transverse loading through theoretical and numerical analysis. The yield criterion and analytical solution for the plastic behavior of the foam-filled tube are proposed, considering the interaction between bending, stretching, and foam strength. The numerical results confirm the accuracy of the analytical model. The influences of various factors on the load-carrying capacity and energy absorption of the foam-filled tubes are discussed in detail.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Manufacturing
Luong Pham, Guoxing Lu, Phuong Tran
Summary: This study investigates the influence of different architectural arrangements on the mechanical properties of hardened concrete. The experimental results show significant improvements in the flexural strengths of nontraditional specimens without steel fibers. The quasi-isotropic pattern demonstrates significant influences on both compressive and flexural responses.
3D PRINTING AND ADDITIVE MANUFACTURING
(2022)
Article
Geochemistry & Geophysics
Zhen Zeng, Yu-Fang Sun, Hao-Ye Tang, Guo-Xing Lu, Lin Yang, Fang Huang, Hui-Min Yu
Summary: This study introduces a method for high-precision Si isotope measurement of soil and sediment reference materials using HF-free digestion and multi-collector inductively coupled plasma-mass spectrometry. It rigorously evaluates potential impacts on instrumental measurement, such as acid concentration, Si concentration mismatch, and matrix effects. The results show that acidity and Si concentration mismatch can cause significant deviations in delta Si-30 values, highlighting the importance of careful sample preparation for accurate Si isotope measurements.
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2022)
Article
Engineering, Civil
Fang-Fang Li, Zhuang-Zhuang Zhang, Ya-Dong Zhou, Yang Lv
Summary: A modified concentrated spring model is proposed to simulate the rocking of asymmetric rigid blocks free-standing on a flexible foundation with a slope. The study reveals that the rocking response of a rigid block can be influenced by the slope of the flexible foundation and the slenderness of the block.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Engineering, Marine
Yu Chen, Yang Lv, Kun Wu, Xin Huang
Summary: Previous investigations have shown that water-pier interaction has a significant effect on the seismic response of bridge piers in deep water. This study focuses on the hydrodynamic effects on bridge piers built on soft ground and conducts a series of centrifuge shaking table tests. The results indicate that water depth affects the natural frequency, displacement, acceleration, and bending moment of the pier. Additionally, the hydrodynamic pressure on the pier and the dynamic soil pressure on the pile increase with increasing water depth.
Article
Construction & Building Technology
Xuejie Zhang, Honglong Wang, Yang Lv, Jie Li
Summary: Glass fiber reinforced polymer (GFRP) is widely used for structural retrofit due to its excellent mechanical properties and cost performance. This study investigates the quasi-static and dynamic properties of commonly used GFRP and finds that its tensile strength, Young's modulus, and failure strain show strain rate sensitivity. The findings provide valuable insights for predicting the dynamic behavior of GFRP retrofitted structures.
MATERIALS AND STRUCTURES
(2022)
Article
Engineering, Geological
Jian Yang, Zi-qi Yang, Yu Chen, Yang Lv, Nawawi Chouw
Summary: In this paper, a finite element model of an upliftable rigid frame bridge is developed and verified through a series of shaking table tests. The model considers the rocking behavior of the structure due to the uplift between the foundation and the support. The results show that the finite element model is consistent with the experimental results and can be used to evaluate the displacement, acceleration, and bending moment of bridges with an upliftable foundation.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Dora Karagiozova, Meng Wang, Guoxing Lu
Summary: The mechanical properties of Miura-ori foldcore metamaterials were investigated using finite element simulations. The study analyzed the response of foldcores with different topological parameters to out-of-plane compression and shear loading, considering relative density as the governing parameter. The results revealed non-unique relationships between core density and material strength in different loading directions, highlighting the significant influence of the Miura-ori topology. Linear relationships were established between elastic moduli and relative densities, while power law functions were established for strength in different loading directions. The study also compared the mechanical characteristics of Miura-ori material with a prismatic hexagonal honeycomb, showing that the honeycomb outperformed the Miura-ori foldcore in all loading directions for large deformations.
ACTA MECHANICA SOLIDA SINICA
(2023)
Article
Engineering, Mechanical
Xinyi Zhang, Shenghai Wang, Yvonne Durandet, Suresh Palanisamy, Guoxing Lu
Summary: This study systematically investigates the tensile behavior of thin-walled tubes with pleated patterns, known as origami bellows. The experimental and numerical results show that the origami bellows exhibit desirable tensile process with stable and high plateau force. It provides a new avenue for constructing energy absorbers with good energy-absorption performance under tensile loading.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Mechanical
Peng Wang, Fan Yang, Pengfei Li, Weiren Zhang, Guoxing Lu, Hualin Fan
Summary: Inspired by the skeletal system of deep-sea glass sponge, a new structure called vertex modified body-centered cubic (VM-BCC) lattice was proposed, which outperforms conventional lattices in terms of strength, deformation stability, and energy absorption capacity. This novel bio-inspired lattice enriches the design space for lightweight energy absorbers and has potential applications in the fields of national defense, aerospace, navigation, and medical implants.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Civil
Meng Wang, Jianjun Zhang, Guoxing Lu
Summary: Previous studies have used Voronoi honeycombs to represent and predict the responses of random foams. However, it has been assumed that a two-dimensional Voronoi honeycomb model can accurately represent the behavior of three-dimensional foams. This study aims to investigate the performance difference and intrinsic relationship between Voronoi honeycombs and foams.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Mechanical
Jiaqi Huang, Weixiang Shen, Guoxing Lu
Summary: This study investigates the failure mechanism of an 18650 cylindrical battery under different loading rates, revealing different failure forms and voltage drops under static and dynamic loading conditions. A finite element model is established to optimize the design of battery components and enhance their crashworthiness.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Mechanical
Xi Zhang, Xiaodong Huang, Guoxing Lu
Summary: In this study, a novel perforated Miura-ori phononic structure (PMPS) is introduced, and the tunability of complete or partial bandgaps in specific directions is investigated. The validity of the bandgaps is verified through simulation and experimental measurement of sound transmission loss in a three-dimensional printed Miura-ori panel. The results demonstrate extensive bandgap tunability of PMPS with different design parameters during deployments and folds. Additionally, potential applications of PMPS, such as programmable acoustic waveguides, are demonstrated. Lightweight PMPSs offer an attractive alternative for designing tunable, programmable, and reconfigurable acoustic structures, including sound waveguides, sound barriers, and broadband wave tailors.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Civil
Dian Zhang, A. K. Qin, Shirley Shen, Adrian Trinchi, Guoxing Lu
Summary: Origami-inspired metamaterials are applied in science and engineering due to their unique mechanical characteristics. The folding process of origami structures is complex and traditional solutions cannot accurately reflect it. This study proposes a new data-driven framework, CTGAN, for predicting the energy absorption properties of origami structures based on a small number of samples, overcoming the limitations of machine learning methods in origami structure analysis.
THIN-WALLED STRUCTURES
(2023)
Article
Construction & Building Technology
Fangfang Li, Junjie Gao, Yu Zhang, Yu Chen, Yang Lv
Summary: Behavior of corrugated steel plate shear walls considering actual gravity load was investigated through lateral and vertical loading tests on four scaled specimens. Failure mode, envelope curves, and hysteretic curves were analyzed. A numerical simulation model was established based on experimental validation. The results showed good agreement between experimental and simulated hysteresis curves. Parametric analysis on SPSWs with different infill plates, height-to-thickness ratio, and gravity loads was conducted.
Article
Engineering, Civil
Shu-Sheng Qu, Yu Chen, Yang Lv
Summary: In this study, the seismic response of a friction pendulum bearing isolated structure with a pile foundation under earthquakes was simulated using a centrifuge shaking table. The study found that soil structure interaction has a significant influence on the seismic performance of the structure, and the rotation of the soil is a key factor.
EARTHQUAKES AND STRUCTURES
(2022)
Article
Engineering, Mechanical
A. P. Simonov, I. V. Sergeichev
Summary: The direct impact method provides a higher sample deformation rate and reliable results for materials with low yield strength and hardening rate. This study proposes an alternative procedure for calculating the strain rate in order to improve accuracy of the direct impact method for a wide range of metals and alloys. The proposed method has been validated through finite element analysis and direct impact tests, and it qualitatively changes the shape of the stress-strain curve by adding an unloading area.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
Qiang Wei, Zifeng Li
Summary: This study investigates the dynamic bifurcation of a column when it impacts a rigid plane vertically, which is different from the classical Eulerian static buckling. The findings show that either the dimensionless critical buckling time or the dimensionless critical buckling velocity can be used to determine whether buckling has occurred. Different dimensionless initial defects in the column result in different dimensionless displacement responses, and the nonlinear effect influences the analysis results.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
M. C. Price, M. J. Cole, K. H. Harriss, L. S. Alesbrook, M. J. Burchell, P. J. Wozniakiewicz
Summary: This article introduces a new gas gun developed at the Centre for Astrophysics and Planetary Science, University of Kent, which can produce vertical impacts at speeds up to 2 km/s. The gun design, assembly, operation, and ancillary components are described in detail. The experimental results demonstrate that the gun performs as expected.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
Fanny Gant, Gabriel Seisson, Patrice Longere, Skander El Mai, Jean-Luc Zinszner
Summary: The article investigates the high strain rate response of metals and alloys under radial expansion and compares different materials. The results show that different materials exhibit different responses in terms of deformation and fracture.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
M. D. Fitzgerald, J. D. Pecover, N. Petrinic, D. E. Eakins
Summary: This study investigates the mechanism for the destruction of thick flyers accelerated using electric guns and proposes strategies for mitigating their break-up based on experimental results and mathematical models. The findings suggest that limiting the maximum pressure within the flyer and extending the current rise time can prevent flyer failure, increasing the efficiency and shock duration of the electric gun.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
Guowen Gao, Enling Tang, Guolai Yang, Yafei Han, Mengzhou Chang, Kai Guo, Liping He
Summary: In this study, the dynamic constitutive model of Al/Ep/W material was investigated and verified through experiments and numerical simulations. The proposed model accurately described the mechanical behavior of the material under high strain rates, providing an important reference for evaluating the response characteristics of the new energetic material projectile to lightweight aluminum armor.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
Minzu Liang, Meng Zhou, Xiangyu Li, Yuliang Lin, Fangyun Lu
Summary: UHMWPE fiber mesh reinforced polyurea composites improve structural strength and blast resistance performance, and can alter the failure mode. Loose filler is generated as polyurea melts and fragments penetrate. Joint loads are classified into three categories based on their connection and duration.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
Ashutosh Jha, Guglielmo Cimolai, Iman Dayyani
Summary: The present article introduces the Zero Poisson's Ratio Fish Cells metamaterial and investigates the effects of Poisson's ratio on the crashworthiness of different lattice structures. Numerical results demonstrate that the Zero Poisson's Ratio model possesses greater stability and structural integrity with minimal edge deformations.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
Hongbo Zhang, Dayong Hu, Xubin Ye, Xin Chen, Yuhuai He
Summary: This study investigated the impact of spherical foreign objects on simulated blade edges through experimental and theoretical analysis. The experimental results showed that increasing impact energy resulted in larger damage sizes, and three distinct types of deformations were observed in FOD. Accurate FOD prediction models were developed using linear and power formulas. The theoretical analysis using a spring-mass system based on Winkler's elastic-plastic foundation theory yielded results in good agreement with experimental measurements, providing a reference for fatigue life assessment of aeroengine blades.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
L. M. Reitter, Y. A. Malik, A. B. Jahn, I. V. Roisman, J. Hussong
Summary: This study characterizes the dynamic strength of wet granular ice layers through impact tests. The results reveal strong connections between ice particles in ice layers generated by ice crystal accretion. Comparable strength values can be obtained by reinforcing ice particle connections in ice layers prepared in the laboratory.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
Kyle Mao, Genevieve Toussaint, Alexandra Komrakova, James D. Hogan
Summary: In this study, the Generalized Incremental Stress State dependent damage MOdel (GISSMO) is used to simulate the high-velocity impact failure of Armox 500T steel. The GISSMO is calibrated and validated using experimental data from the literature, and is then applied to investigate the impact failure behaviors of bi-layered steel systems. The results provide new capabilities and insights for the design of armor structures and evaluation of impact failure behaviors in Armox 500T/RHA bi-layered systems.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
Asim Onder
Summary: This paper investigates the performance of bumper plates with wavy surfaces under hypervelocity impact and finds that they are more effective in decreasing the impact energy compared to flat plates. The study also reveals the distinctive debris cloud generation that has never been reported before.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
Zhi-Yong Yin, Xiao-wei Chen
Summary: This study numerically reveals three typical fracture modes of explosively-driven metal shells and investigates the influencing factors of different fracture modes through experimental data and dimensional analysis.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
Jiri Pachman, David J. Chapman, Marek Foglar, Martin Kunzel, William G. Proud
Summary: Through the study of different types of concrete, it was found that despite their compositional complexity, range of compressive strengths, and reinforcement methods, the average Hugoniot data were remarkably similar between different concrete types.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
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)