Article
Physics, Applied
Junyi Li, Jun Weng, Jiaqi Li, Shuxian Chen, Zicong Guo, Pengbai Xu, Wenjie Liu, Kunhua Wen, Yuwen Qin
Summary: This research proposes a metamaterial structure composed of a graphene sandwich structure to achieve triple plasmon-induced transparency. The phenomenon is generated by the interaction of bright-bright modes in the proposed structure, and the results are consistent with simulations using the finite difference time domain method. Additionally, the study discusses the effects of graphene Fermi level and scattering rate on the transmission spectrum. The results show that five-fold switching effects are achieved with different modulation depths, and the graphene strip can be adjusted by changing Fermi levels. This model has potential applications in multi-functional modulators and optical switches in the terahertz band.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Mechanics
A. R. Damanpack, M. Bodaghi
Summary: This paper introduces a new sandwich beam element for analyzing structures with a flexible core and partially delaminated regions. The element uses high-order sandwich panel theory to consider core flexibility and nonlinearities of delaminated regions, ensuring continuity conditions for displacements and rotations at the interfaces. Results show good agreement with both sandwich and 2D FE models in predicting large deformation behaviors.
COMPOSITE STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Julien Sylvestre, Jean-Francois Morissette
Summary: The study shows that mechanical metamaterials can achieve complex non-linear functions through training, with force and displacement equilibrium configurations mathematically equivalent to fixed points of artificial neural networks. By using a gradient descent algorithm, these metamaterials can design systems with complex input-output relationships.
MATERIALS & DESIGN
(2021)
Article
Mechanics
S. Q. Zhang, Y. S. Gao, G. Z. Zhao, H. Y. Pu, M. Wang, J. H. Ding, Y. Sun
Summary: This study establishes electro-mechanically coupled finite element models for viscoelastic laminated piezo smart plates and shells based on vibration and damping analyses. The models are validated through finite element simulations of viscoelastic sandwich plates. The research demonstrates the effects of various parameters on the damping performance of piezo-viscoelastic laminated cylindrical structures, such as boundary conditions and reinforcement orientation angles, providing a powerful tool for accurately investigating the behaviors of viscoelastic laminated structures.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Y. S. Gao, S. Q. Zhang, G. Z. Zhao, R. Schmidt
Summary: A finite element formulation was developed for sandwich smart structures with partially smart constrained layer damping treatment, based on the Reissner-Mindlin theory. The FE model was validated through frequency and loss factor analysis, with parameters such as coverage percentage, layer thickness, and shear modulus studied for their effects on damping characteristics.
COMPOSITE STRUCTURES
(2022)
Article
Instruments & Instrumentation
A. Serjouei, A. Yousefi, A. Jenaki, M. Bodaghi, M. Mehrpouya
Summary: Additive manufacturing enables the fabrication of smart sandwich structures with shape memory functionality through four-dimensional (4D) printing, allowing deformed structures to recover their original shape by simple heating. Experimental and simulation studies identify wall thickness, layer height, and nozzle temperature as critical parameters affecting compressive load and energy absorption rate. These findings are expected to guide the design and fabrication of 4D printed sandwich structures for energy absorption applications.
SMART MATERIALS AND STRUCTURES
(2022)
Article
Chemistry, Physical
Linzhongyang E, Zhijing Wu, Fengming Li, Guangping Zou
Summary: In this study, elastic metamaterial sandwich plates with axially deformed Timoshenko beam cores were designed and their vibration band-gap properties were explored. The finite element method (FEM) and the spectral element method (SEM) were combined to establish the dynamic model and calculate the frequency response functions (FRFs) of the plates. It was found that the metamaterial sandwich plates possess both axial and transverse vibration band-gaps, and those with axially deformed beam cores have wider application ranges for vibration reduction compared to plates with rod cores.
Article
Mechanics
Koichi Mizukami, Kentaro Abe, Takehito Senga, Keiji Ogi
Summary: In this paper, a locally resonant sandwich metamaterial beam with inertial amplification mechanisms is proposed for flexural vibration attenuation. Analytical equations of motion are derived using Hamilton's principle and analytical solutions for the stopband boundary frequencies are obtained. Finite element analyses and experiments confirm the frequency response of the sandwich beam and validate the analytical solutions.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Pouria Oliazadeh, Anooshiravan Farshidianfar, Malcolm J. Crocker
Summary: This paper investigates the sound transmission through foam-filled honeycomb sandwich panels, experimentally and analytically. An analytical model based on statistical energy analysis (SEA) is developed in detail for a honeycomb sandwich panel. The validity of the theoretical result is verified by implementing a comparison with experimental measurement, showing good agreement in the medium and high frequency regions and particularly at the critical frequency of the panel.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Marine
Hui Fang, Huadan Zhu, Aijun Li, Huichao Liu, Senlin Luo, Yilun Liu, Yong Liu, Huajun Li
Summary: A novel material-structure-hydroelasticity coupling analytical model is proposed for the calculation and optimization of a very large floating sandwich structure with a hierarchical ultrahigh-performance concrete core. By utilizing the coupling analysis and optimization, physically significant optimization of floating composite structures in ocean engineering can be achieved.
Article
Engineering, Mechanical
Xing Chi Teng, Wei Jiang, Xue Gang Zhang, Dong Han, Xi Hai Ni, Hang Hang Xu, Jian Hao, Tong Guo, Yu Fei Wu, Yi Min Xie, Xin Ren
Summary: A novel sandwich panel structure inspired by the synclastic curvature behavior of auxetic metamaterial was proposed to improve the controllability, auxeticity, flexibility, and synclastic curvature of traditional sandwich panels. Experimental and numerical methods were used to compare the similarities and differences between the novel and traditional sandwich panels under uniaxial compression. The study also explored the auxeticity, stretchability, synclastic curvature, and potential applications of the novel sandwich panel.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Chemistry, Physical
Zhicheng Huang, Jinbo Pan, Ziheng Yang, Xingguo Wang, Fulei Chu
Summary: The present study investigates the nonlinear vibration behavior of EVES beams using a FE model. The FE model shows better accuracy in predicting the natural frequency of sandwich beams, with the prediction accuracy of damping related to the thickness of each layer. The results provide important reference values for the design and optimization of viscoelastic sandwich structures.
Article
Engineering, Mechanical
Peng Sheng, Xin Fang, Li Dai, Dianlong Yu, Jihong Wen
Summary: This paper investigates a honeycomb sandwich plate based on nonlinear acoustic metamaterials and analyzes its vibration reduction properties through numerical and experimental methods. The results show that the plate can effectively suppress low-frequency and broadband vibrations.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Yu-Xuan Xing, Ying-Shan Gao, Tao Liu, Wei-Yuan Dou, Shun-Qi Zhang
Summary: This paper proposes a homogenization approach for lattice sandwich structures filled with viscoelastic materials using periodic boundary conditions. It also introduces a two-dimensional finite element modeling method based on the zig-zag hypothesis for piezolaminated lattice sandwich structures. The proposed methods are applied to obtain material parameters and simulate sandwich structures filled with viscoelastic materials.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Mechanics
Shaik Sadikbasha, V. Pandurangan
Summary: This paper investigates the energy absorption and deformation characteristics of sandwich structures with auxetic tetrachiral core under high velocity projectile impact. The finite element model of the structure is developed and validated using in-house experiments and experimental data reported in the literature. A semi-analytical model is also developed to estimate the residual velocities and energy absorption of the sandwich structure under blunt projectile impact. The study compares the performance of sandwich structures with different core designs and shows that those with auxetic cores exhibit better energy absorption characteristics.
COMPOSITE STRUCTURES
(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)