Article
Engineering, Marine
Alexander Korobkin, Tatiana Khabakhpasheva
Summary: This paper studies the mathematical modeling of visco-elastic plate breaking and the consequent deflection of the plate. By using a simplified formulation, the authors model the plate as a thin visco-elastic plate with constant thickness and clamped edges. The plate deflection is caused by a gradually increasing aerodynamic pressure, and the plate breaks instantly when a modified fracture criterion is met. The motion of the plate parts after breaking is highly unsteady and dependent on the plate's viscous properties.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Physical
San To Chan, Stylianos Varchanis, Simon J. Haward, Amy Q. Shen
Summary: Experimental and simulation results show that viscoelastic liquid bridges made of Boger fluids can be effectively destabilized by torsion, with the deformation depending on the competition between elastocapillarity and torsion-induced normal stress effects. The liquid bridge can thin into a cylindrical thread under dominant elastocapillary effect or deform similarly to edge fracture under dominant torsion-induced normal stress effect.
Article
Mechanics
Rui Zhang, Bin Han, Yi Zhou, Lu-Sheng Qiang, Qi Zhang, Qian-Cheng Zhang, Tian Jian Lu
Summary: A multifunctional sandwich plate with ultra-high molecular weight polyethylene (UHMWPE) fiber metal laminate (FML) skins and aluminum honeycomb core was proposed to improve penetration resistance while maintaining load-bearing and blast mitigation capabilities. Experimental and numerical analysis showed that incorporating UHMWPE composite layers into the skin significantly enhanced penetration resistance and bending capacity, and reduced deflection under impulsive shock loading. The proposed cellular sandwich plate can be designed as an ultralight multifunctional structure with simultaneous load-bearing and blast/ballistic resistant capabilities.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Marine
Shuangxi Xu, Hao Wen, Bin Liu, C. Guedes Soares
Summary: The paper presents experiments and finite element simulations of welded aluminium-alloy 5083-H111 plates under near-field air-blast loadings to examine their dynamic plastic deformation and failure. The study reveals the impact behavior of the welded aluminium plates in contrast to the steel plates. The effect of explosive charge-plate distance and the weld seam on the structural dynamic response is evaluated.
SHIPS AND OFFSHORE STRUCTURES
(2022)
Article
Engineering, Mechanical
Mohammad Reza Khosravani, Shahed Rezaei, Shirko Faroughi, Tamara Reinicke
Summary: This study investigates the mechanical strength and fracture behavior of 3D-printed open-hole plates. Experimental and numerical simulations are conducted to analyze the effects of different parameters on the performance of the plates. The results provide valuable insights for the design and optimization of 3D-printed open-hole plates in the future.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Mechanics
H. Otto, C. Cierpka
Summary: This study investigates experimental convective flows in vertically stratified environments to complement theoretical studies and reveals fundamental physical mechanisms in stratified vertical convection.
Article
Engineering, Marine
Ying Li, Xianben Ren, Tian Zhao, Dengbao Xiao, Kai Liu, Daining Fang
Summary: This paper investigated the dynamic response of stiffened plates under internal blast loading. The study found that the deflection of plates decreased and then increased with an increase in stand-off distance. Additionally, despite increasing deformation resistance, stiffeners tended to reduce the damage tolerance of the plates.
Article
Engineering, Civil
Qiang Liu, Baoqiao Guo, Pengwan Chen, Hongbo Zhai, Yansong Guo, Songlei Tang
Summary: With the development of composite structures, polyurea elastomer can be used to enhance the protective performance of composite laminated structures. A study was done on the blast resistance of CFRP/polyurea composite plates using a 3D-DIC full-field measurement method. The results showed that the polyurea coating on the rear surface of CFRP exhibited superior blast resistance, while the deformation level of the composite plates increased with the decrease of scaled distance.
THIN-WALLED STRUCTURES
(2022)
Article
Construction & Building Technology
Gabriel de Jesus Gomes, Valter Jose da Guia Lucio, Corneliu Cismasiu, Jose Luis Mingote
Summary: The paper describes a blast testing experiment on an energy-absorbing connector consisting of thin-walled inversion tubes mounted in a facade protective panel. Finite element predictions matched well with experimental observations. The numerical model was then used to analyze the response of a reinforced concrete structure under different blast scenarios, assessing the effectiveness of the protective system. The introduction of energy-absorbing connectors significantly reduced the forces and energy absorbed by the structure in various explosion scenarios.
Article
Engineering, Civil
Qi Wang, Huilan Ren, Jianqiao Li
Summary: In this study, a theoretical model was proposed to describe the deformation behavior of a blast-loaded metal plate. The model was validated through numerical simulations and experimental verification. The study also identified the relationship between deflection and driven velocity with the plate's width-thickness ratio and obtained fitted polynomial relationships. Furthermore, a regression analysis improved the prediction efficiency and reliability of the model.
THIN-WALLED STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Zhujie Zhao, Hailiang Hou, Dian Li, Yongqing Li, Anbang Jiang
Summary: A fluid filled concave multicell structure that combined the concave multicell pattern with a fluid filled structure was designed, and its dynamic response and protective effectiveness under air blast loading were studied. The study analyzed the relationships between wave propagation process, structural deformation mode, protection effectiveness, and energy absorption. The results showed that changes in fluid filling configuration affected the stiffness distribution and local constraints of the concave multicell structure, altering wave propagation process, deformation, and energy absorption. An alternative arrangement of fluid-filled and unfilled cells effectively reduced loading intensity, induced compatible deformation, and improved protection effectiveness.
MATERIALS & DESIGN
(2023)
Article
Optics
Cheng Chen, Renshu Yang, Peng Xu, Chenxi Ding
Summary: This paper investigates the interaction between oblique incident blast stress wave and prefabricated crack using dynamic photoelastic method and numerical simulation method. Experimental results show that the incident angle of blast stress wave significantly influences the interaction with the crack and stress field at the crack tip. Numerical models based on experimental results demonstrate good agreement with photoelastic experiments, validating the analysis.
OPTICS AND LASERS IN ENGINEERING
(2022)
Article
Mechanics
L. Esposito, V Minutolo, M. Fraldi, E. Sacco
Summary: This study presents a linear poroelastic model for a quasi-static oscillating bilayer beam and validates the accuracy of the solution through theoretical analysis and Finite Element simulations. Sensitivity analyses were conducted to investigate the effects of variations in material and geometric parameters on stress distribution and fluid flow, and interferences due to dynamic loading were discussed based on numerical analyses.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Engineering, Civil
Matteo Colombo, Paolo Martinelli, Assis Arano, Jan Arve Overli, Max A. N. Hendriks, Terje Kanstad, Marco di Prisco
Summary: The study investigates the structural performance and damage accumulation effect of reinforced concrete structures under combined fire and blast actions. A reliable benchmark for numerical models was obtained through a combination of experiments and numerical models.
Article
Materials Science, Multidisciplinary
Tohid Adibi, Seyed Esmail Razavi, Shams Forruque Ahmed, Hussein Hassanpour, Neda Mohammadzadeh, S. M. Muyeen
Summary: Controlling noise pollution is crucial in various industries, and the use of elastic plates has a significant impact. However, the effect of a rib and elastic plate on the acoustic properties of a channel for different Reynolds numbers has not been investigated. This study examines the acoustic and flow impacts of a rib and elastic plate, and the results show a 27% increase in transmission loss at the highest position of the elastic plate. By reducing the length of the elastic plate by 50%, the mean transmission loss is reduced by 9%. The findings are important for engineers in designing aircraft, automobiles, and cooling/heating systems.
RESULTS IN PHYSICS
(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)