Article
Materials Science, Multidisciplinary
Rhosslyn Adams, Scott Townsend, Shwe Soe, Peter Theobald
Summary: Selective laser sintering was used to manufacture different structural variations of a pre-buckled circular honeycomb, and the mechanical behavior of these structures under both quasistatic and dynamic impact loading was examined. It was found that the aspect ratio of the honeycomb could be adjusted to yield different mechanical responses, but this also affected the characteristic stress-softening response of traditional honeycombs. A stabilized response was observed when subjected to multiple cycles of loading, and the numerical models closely matched the experimental results. A simplified periodic boundary condition model provided a faster computational solution.
MATERIALS & DESIGN
(2022)
Article
Engineering, Mechanical
Shuwen Zhang, Tao Fan
Summary: In this study, hexagonal hierarchical honeycombs with regular triangular substructures were analyzed. The expressions of relative density and collapse stress were derived based on an analytical model. The results showed that the number of substructures, aspect ratio, and wall angle have different effects on the relative density. It was also found that hierarchical honeycombs exhibit better energy absorption performance compared to conventional honeycombs due to the introduction of triangular substructures.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2022)
Article
Mechanics
Yunfei Qu, Dian Wang
Summary: The mechanical properties and energy absorption characteristics of roller honeycomb feeding roller (RHFR) and roller double V-wings honeycomb (RDWH) in forest harvester were analyzed, showing that RDWH performed better under compression impact.
COMPOSITE STRUCTURES
(2021)
Article
Computer Science, Interdisciplinary Applications
Luke M. D'Aquila, Brian T. Helenbrook, Alireza Mazaheri
Summary: A high-order accuracy finite element method has been implemented for flow simulations with shocks by using a moving-grid, shock-fitting approach. The method solves Euler or Navier-Stokes equations on a moving mesh and introduces a stabilization term to ensure convergence behavior. The proposed scheme demonstrates smooth and noise-free surface heating prediction for hypersonic flow over a cylinder with irregular triangular elements.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Materials Science, Composites
Yunfei Qu, Dian Wang, Hongye Zhang
Summary: The study established an equivalent method for the double V-wing honeycomb to improve performance efficiency and reduce weight. The equivalent honeycombs showed stronger impact resistance and better load-bearing capacity compared to hexagonal honeycombs under dynamic impact.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2021)
Article
Materials Science, Multidisciplinary
Andrew Akerson
Summary: Designing for impact resistance is challenging due to the complex physics and failure modes involved. Recent advances in 3D printing and additive manufacturing techniques allow for tailored geometries and multi-material structures. This study applies gradient-based topology optimization to design such structures, and presents efficient methods for computing their transient dynamic evolution. By studying the optimal design of solid-void structures and spall-resistant structures, the trade-offs between strength and toughness are explored.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Engineering, Mechanical
Andres Garcia-Perez, Giuliano Coppotelli, Gustavo Alonso
Summary: This paper discusses the shocks and impact loads generated during the operational life of aerospace vehicles, and proposes a new method for Response Spectrum Analysis to accurately calculate peak response accelerations. The method is verified through numerical analyses on a beam structure to demonstrate improved accuracy compared to existing options.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Engineering, Civil
Yiyi Zhou, Yunfan Li, Dan Jiang, Yu Chen, Yi Min Xie, Liang-Jiu Jia
Summary: In this study, drop hammer impact tests and finite element analyses were conducted to investigate the dynamic responses of metallic auxetic honeycombs. The results showed that the auxetic honeycomb specimens had better energy absorption performance, leading to significantly improved energy absorption efficiency.
ENGINEERING STRUCTURES
(2022)
Article
Polymer Science
Valerio Acanfora, Ferdinando Baldieri, Antonio Garofano, Francesco Fittipaldi, Aniello Riccio
Summary: This paper evaluates the performance of highly efficient shock absorbers integrated in key locations of a minibus chassis through numerical crash simulations. It proposes a high-performing structural solution by improving the current design and manufacturing process, using additive manufactured hybrid polymer/composite shock absorbers. The results show that the use of high-efficiency additively manufactured sandwich shock absorbers effectively improves the passive safety of passengers.
Article
Mechanics
Zhangxi Feng, Miroslav Zecevic, Marko Knezevic, Ricardo A. Lebensohn
Summary: This article presents the use of a single crystal material subroutine to simulate impact experiments on single crystal Ta materials with different crystal orientations. The authors demonstrate the significant role played by crystal orientation-induced anisotropy, strain hardening, and adiabatic heating in the dynamic deformation response of crystalline materials.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Engineering, Civil
Yang Gao, Xianjia Chen, Yujie Wei
Summary: This study found that density gradient design can effectively improve the energy absorption of honeycomb structures, and the optimal density gradient was identified using a neural network. The energy absorption efficiency of hexagonal and auxetic honeycomb structures with optimal density gradient was found to be 66% and 40% higher than their respective uniform structures. Finite element analysis revealed that density gradient enables loading transfer among a greater deformation zone, leading to more cells involving in energy absorption. The equal-load-partition strategy in graded honeycomb structures is responsible for their supreme energy absorption. The developed machine learning method and the revealed deformation mechanisms are of great significance for the design of new materials.
THIN-WALLED STRUCTURES
(2023)
Article
Mechanics
Yao Huang, Jiu Hui Wu, Yunzhong Lei, Jiamin Niu
Summary: In this study, meta-honeycombs were designed by adding local resonance plates (LRP) to improve impact resistance. The negative mass and directional bandgap properties of the LRP were investigated to predict the impact resistance of the meta-honeycombs. Experimental and simulation results verified the effectiveness of three meta-honeycombs with different core structures in protecting against impact and blast waves. The mechanical properties of the meta-honeycombs were further optimized by coupling different resonators in the LRP.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Genda Wang, Jiefu Liu, Zhaijun Lu
Summary: This study investigates the impact resistance of sandwich panels with different honeycomb configurations. The results show that flat panels perform better than curved panels at low impact velocities, and a small radius of curvature should be avoided to enhance impact resistance. Under high-velocity impact, panels with concentric honeycombs show improved resistance compared to those with coaxial honeycombs. However, the influence of honeycomb configurations decreases as the curvature radius increases.
COMPOSITE STRUCTURES
(2022)
Article
Biotechnology & Applied Microbiology
Meriem Banouh, David Armisen, Annaig Bouguennec, Cecile Huneau, Mamadou Dia Sow, Caroline Pont, Jerome Salse, Peter Civan
Summary: In this study, transcriptome analysis was conducted on synthetic wheat, and it was found that the transcriptomic response to polyploidization is modest, with only about 1% of expressed genes showing significant differences compared to their lower-ploidy parents. Most of the differentially expressed genes are located on the D subgenome, and their expression changes are inconsistent. The expression bias of homoeologs in synthetic wheat is tissue-specific, and the upregulation of transposable element families is not significantly associated with expression changes in proximal genes.
Article
Engineering, Mechanical
Xiaoqiang Niu, Fengxiang Xu, Zhen Zou, Yifan Zhu, Libin Duan, Zhanpeng Du, Hongfeng Ma
Summary: The study proposes novel bio-honeycombs by introducing the micro-structure of horsetail stems into regular hexagonal honeycomb (RH) cells, which improves the crushing resistance. Experimental and finite element (FE) analysis show a significant interaction effect between the introduced bionic units and the RH frame component, resulting in more severe plastic deformation at their intersections and more folding lobes formed on the cell walls. The study also demonstrates that smaller cell size in the bio-honeycombs improves material utilization efficiency.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Mechanics
Ye Yuan, Ling Zhu, Xueyu Bai, T. X. Yu, Yibing Li, P. J. Tan
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2019)
Article
Engineering, Mechanical
Xu Zejian, He Xiaodong, Hu Hongzhi, P. J. Tan, Liu Yu, Huang Fenglei
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2019)
Article
Multidisciplinary Sciences
Carlos A. Ledezma, Xin Zhou, Blanca Rodriguez, P. J. Tan, Vanessa Diaz-Zuccarini
Article
Engineering, Marine
L. Liu, P. J. Tan, Y. Yuan, P. Wrobel
SHIPS AND OFFSHORE STRUCTURES
(2020)
Article
Engineering, Biomedical
Yuyang Wei, Zhenmin Zou, Guowu Wei, Lei Ren, Zhihui Qian
ANNALS OF BIOMEDICAL ENGINEERING
(2020)
Article
Construction & Building Technology
A. C. Faralli, P. J. Tan, G. J. Mcshane, P. Wrobel
JOURNAL OF STRUCTURAL ENGINEERING
(2020)
Article
Engineering, Biomedical
Yuyang Wei, Zhenmin Zou, Zhihui Qian, Lei Ren, Guowu Wei
Summary: The extensor hood and lateral band are critical components for maintaining grasping quality, with the former playing a more important role. The hardness of tendon material also affects grasping quality, but the enhancing effect levels off once the hardness reaches a certain point.
IEEE TRANSACTIONS ON NEURAL SYSTEMS AND REHABILITATION ENGINEERING
(2022)
Article
Polymer Science
Sheng Wang, Mehmet Cagatay Akbolat, Kali Babu Katnam, Zhenmin Zou, Prasad Potluri, Stephan Sprenger, James Taylor
Summary: This paper investigates the effect of core-shell rubber nanoparticles and non-woven microfibre veils on the delamination resistance and crack migration in carbon fibre/epoxy laminates. The results show that the combination of these two toughening methods significantly enhances the fracture energies under mode-I and mode-II conditions and affects micro-failure mechanisms and crack paths.
Article
Engineering, Manufacturing
Sheng Wang, Mehmet Cagatay Akbolat, Oguzcan Inal, Kali Babu Katnam, Zhenmin Zou, Prasad Potluri, James Taylor
Summary: This study investigates the effect of short micro-fibre-based veils on the fracture energies and R-curves of composite laminates, with a focus on the role of veil binders. The results show that the binders used in the manufacturing of veils have a considerable impact on fracture energy, crack path, and R-curve behavior, with a more pronounced effect in the laminates with carbon veils.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Engineering, Biomedical
Yuyang Wei, Francis P. McGlone, Andrew G. Marshall, Adarsh Makdani, Zhenmin Zou, Lei Ren, Guowu Wei
Summary: This study combines finite element hand and neural dynamic model to predict cutaneous neural dynamics and resulting perception during active tactile exploration. The results show similar performance with microneurography test and human subjects, demonstrating the potential applicability of the model.
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
(2022)
Article
Engineering, Biomedical
Yuyang Wei, Zhenmin Zou, Zhihui Qian, Lei Ren, Guowu Wei
Summary: Human finger joints are traditionally simplified as rigid joints in robotic hand design and biomechanical hand modelling, but the effect of different joint configurations on hand performance is not well understood. This study investigates the grasping performance of hands with rigid and flexible joints using a computational human hand model. The results show that the rigid joint configuration leads to reductions in hand contact force, pressure, and area compared to the flexible joint configuration. Grasping quality can be significantly reduced by the rigid joint configuration due to its weak rotational stiffness.
IEEE TRANSACTIONS ON NEURAL SYSTEMS AND REHABILITATION ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Guangsheng Song, Zhihui Qian, Xiangyu Liu, Boya Chen, Guanghui Li, Zhenguo Wang, Kunyang Wang, Zhenmin Zou, Fabio Galbusera, Marco Domingos, Lei Ren, Hans-Joachim Wilke, Luquan Ren
Summary: Degenerative disc disease (DDD) is a global public health issue that affects patient health and quality of life. Artificial total disc replacement (A-TDR) is an effective method for treating symptomatic DDD, but current devices lack the ability to replicate the multidirectional stiffness of natural intervertebral discs (IVDs). This study develops a bioinspired intervertebral disc (BIVD-L) that reproduces the multidirectional stiffness needed for physiological kinematic behaviors, providing new insights for the design of A-TDR devices.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Manufacturing
Sheng Wang, Mehmet Cagatay Akbolat, Kali Babu Katnam, Zhenmin Zou, Prasad Potluri, Stephan Sprenger, James Taylor
Summary: This study investigates the impact of hygrothermal ageing on interlaminar fracture of carbon fibre/epoxy composite laminates with different toughening methods. The results show that hygrothermal ageing significantly affects the fracture behavior of baseline and toughened laminates. In particular, the fracture energies of laminates with veil toughening and hybrid nanoparticle and veil toughening are considerably degraded and cannot be restored after re-drying, indicating the irreversible degradation caused by hygrothermal ageing.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Engineering, Mechanical
I. Kuszczak, F. I. Azam, M. A. Bessa, P. J. Tan, F. Bosi
Summary: This study presents a computational framework that utilizes Bayesian optimization to design periodic mechanical metamaterials with improved mechanical properties. By varying the thickness of the struts, both the stiffness and strength of the metamaterials have been increased.
EXTREME MECHANICS LETTERS
(2023)
Review
Materials Science, Multidisciplinary
Guangsheng Song, Zhihui Qian, Kunyang Wang, Jing Liu, Yuyang Wei, Fabio Galbusera, Zhenmin Zou, Hans-Joachim Wilke, Luquan Ren, Lei Ren
Summary: The intervertebral disc is an important component of the human spine, and its degeneration can cause pain and disability. Total disc replacement is an effective treatment approach, but the complex environment and conditions present challenges in device design, materials, and processes. This review discusses the advantages and challenges of current total disc replacement devices and proposes a novel fabrication strategy to restore biofunction and improve performance.
PROGRESS IN MATERIALS SCIENCE
(2023)
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)
