Article
Mechanics
Jianxun Zhang, Haoyuan Guo
Summary: In this paper, the plastic behavior of a clamped rectangular sandwich tube with metal foam core is studied using analytical and numerical methods. The analytical solution for the plastic behavior of the tube under transverse loading is derived using the yield criterion, and is compared with numerical results. The influences of the punch width, loading position, foam strength, and tube-wall thickness on the large deflection of the sandwich tubes are discussed based on the analytical model.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Mechanical
Jianxun Zhang, Yuqing Zhu, Kaikai Li, Hui Yuan, Jinlong Du, Qinghua Qin
Summary: This paper investigates the dynamic response and impact resistance of aluminum honeycomb sandwich plates with GLARE face-sheets under metal foam projectile impact. Experimental and numerical results show that the impact resistance and energy absorption of the sandwich plates can be improved by adjusting parameters such as face-sheet thickness, impulse, and core stiffness, providing guidance for the optimal design of FML sandwich structures under metal foam projectile impact.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2022)
Article
Engineering, Civil
Jianxun Zhang, Yang Ye, Jianfeng Li, Yuqing Zhu, Hui Yuan, Qinghua Qin, Modi Zhao
Summary: This paper investigates the dynamic collapse of circular metal foam core sandwich tubes in splitting and curling mode subjected to low-velocity impact. Experimental observations show various deformation modes and the tendency of the number of strips in the sandwich tube to develop from the number of prefabricated cracks to the number of steady strips. The study also establishes a method for predicting the number of steady cracks in the sandwich tubes based on the principle of minimum energy.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Civil
Jianxun Zhang, Wei Huang, Fuxing Miao, Jinlong Du, Hao Sun
Summary: This paper analytically and numerically investigates the plastic behavior of a fully clamped sandwich beam with fiber metal laminate (FML) face sheets and metal foam core under transverse loading. The modified rigid plastic model is used to provide an analytical solution for the large deflection of FML sandwich beams, taking into account the local denting deformation. Finite element results are conducted and the analytical solutions are in good agreement with the numerical results. The influences of material and geometrical parameters on the plastic behavior of FML sandwich beams are considered. The results demonstrate that the proposed analytical model can accurately predict the plastic behavior of fully clamped FML sandwich beams considering the local denting deformation.
THIN-WALLED STRUCTURES
(2022)
Article
Mechanics
Rahul Kumar, Achchhe Lal, B. M. Sutaria
Summary: This paper presents the static and dynamic response analysis of sandwich plates with a corrugated core under patch loading. Using a finite element-based higher shear deformation theory, the influence of various parameters on transverse deflection, stresses, and dynamic bending responses is investigated. A MATLAB program is developed and verified with available results in the literature. The study reveals that transverse deflection increases with an increase in corrugation angle, and maximum rotation around the 'x' and y-axis increases with the area of plates exposed to patch loading. Edge constraints significantly affect transverse deflection and stress.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Chemistry, Physical
Mingshi Wang, Jianxun Zhang, Hui Yuan, Haoyuan Guo, Wenbo Zhuang
Summary: This study investigates the plastic behavior in the large deflection response of slender sandwich beams with fiber metal laminate (FML) face sheets and a metal foam core under transverse loading. It is found that the metal volume fraction and the strength ratio of metal to composite layer are important factors influencing the plastic behavior, while the core strength and punch size have little impact.
Article
Mechanics
Chunping Xiang, Jiao Wang, Shangjun Chen, Guoxi Fan
Summary: In this paper, a yield criterion considering the effect of core strength was proposed for sandwich pipe (SP) materials, and the dynamic response of a fully clamped slender SP under transverse impact was theoretically predicted by considering the interaction of stretching and bending of the structure. The theoretical predictions were verified through the establishment of finite element models, and good agreements were achieved between the theoretical predictions and the numerical results. It is demonstrated that the large deflection of SPs is dominated by the axial force. This study can provide the basic understandings of the structural behaviours of SPs for their safety in submarine applications threated by transverse impact.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Civil
Junsheng Zhu, Zhigeng Fang, Xiaojun Liu, Jingru Zhang, Yaser Kiani
Summary: This study analyzes the free vibration of skew sandwich plates. The sandwich plate consists of three layers, with a metal foam core and pure metal faces. Different types of functionally graded patterns are assumed for the distribution of pores in the core. The governing equations are obtained using the first order shear deformation theory and transformed to an oblique coordinate system. The Ritz method with Chebyshev polynomials is used to represent the shape functions and solve the eigenvalue problem. The results show that parameters such as pore patterns and size, boundary conditions, skew angle, host to face thickness ratio, and aspect ratio have significant effects on the natural frequencies of the plate.
Article
Engineering, Civil
Jianxun Zhang, Long Yuan, Jiangtao Zhang, Jun Yan, Hui Yuan
Summary: The dynamic response of a fully clamped foam-filled X-type sandwich beam under low-velocity impact is studied analytically and numerically. The analytical model based on the yield criterion is developed to predict the impact response. Numerical calculations are carried out and show good agreement with analytical results. The effects of various parameters on the impact resistance of the foam-filled X-type sandwich beam are discussed.
ENGINEERING STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Jianxun Zhang, Henghui Liu, Yu Xiang, Zhimin Xu, Jing Lu, Xiwei Wu, Jinlong Du, Hao Sun
Summary: This article discusses the large deflection and yield criterion of Y-shape sandwich beams filled with foam under lateral load. A yield criterion for foam-filled Y-shape sandwich structure is proposed, taking into account the strength of the metal foam. An analytical solution for large deflection of clamped foam-filled Y-shape sandwich beam is derived using the yield criterion, considering the interaction between stretching and bending. Numerical calculations are performed and the results show good agreement with the theoretical predictions. The effects of metal foam strength, face-sheet thickness, and punch width on large deflection are analyzed.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Mechanics
Yan Song, Hui Yuan, Jinlong Du, Hao Sun, Zelin Han, Jianxun Zhang
Summary: This study investigates the dynamic behavior of clamp-supported rectangular fiber metal laminate (FML) sandwich tubes with metal foam core under low-velocity impact using analytical solution and numerical method analysis. The results reveal various factors affecting the impact force and maximum deflection of FML sandwich tubes.
INTERNATIONAL JOURNAL OF APPLIED MECHANICS
(2022)
Article
Mechanics
Haoyuan Guo, Jianxun Zhang
Summary: To enhance the load-carrying and energy-absorbing capacity of the energy-absorbing structure, a new mode of a metal foam-filled sandwich circular tube expanded by a conical-cylindrical die is designed. An analytical model considering various factors is established and validated through finite element calculations. The effects of material and geometrical parameters on the expansion of MFSC-Tubes are analyzed, and it is found that adjusting certain parameters can enhance the load-carrying and energy-absorbing capacity. Furthermore, the specific energy absorption of the MFSC-Tube is significantly improved compared to hollow tubes.
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
(2023)
Article
Engineering, Mechanical
Yinggang Li, Wen Xiao, Xiong Wu, Ling Zhu
Summary: This paper investigates the dynamic responses of sandwich plates with foam core under wedge impact. An analytical model of fully clamped foam-core sandwich plate is developed based on approximate yield criteria and rigid-perfectly plastic theory. Experimental and numerical simulations of PVC foam-core sandwich plates are conducted to verify the accuracy of the analytical prediction model. The results show that the analytical prediction results are consistent with the experimental and numerical results, and the impact force, deformation distribution, and permanent deformations can be accurately predicted. The theoretical study on the geometrical parameters indicates that the deformation reaches its maximum at an aspect ratio of 1, and the permanent deformation decreases with an increase in wedge width and foam core thickness.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Mechanics
Wei Zhang, Qinghua Qin, Kaikai Li, Jianfeng Li, Qiang Wang
Summary: Among all gradient distributions of foam cores, the impact resistance of the fully clamped composite sandwich beams with negative-gradient foam cores design is the highest. The low-density foam layer at the impact end leads to local failure mode, while the high-density foam layer at the impact end brings about global failure mode. The simply supported graded sandwich beam exhibits softening post-failure behavior, while the fully clamped graded sandwich beam displays hardening post-failure behavior.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2021)
Article
Mechanics
Jianxun Zhang, Haoyuan Guo
Summary: This paper analytically and numerically studies the dynamic response of clamped rectangular sandwich tubes with metal foam core under transverse blast loading. The study finds that the sandwich tube performs better than the hollow tube in terms of energy absorption.
INTERNATIONAL JOURNAL OF APPLIED MECHANICS
(2022)
Article
Chemistry, Multidisciplinary
Yuan-Fang Zhang, Ningbin Zhang, Hardik Hingorani, Ningyuan Ding, Dong Wang, Chao Yuan, Biao Zhang, Guoying Gu, Qi Ge
ADVANCED FUNCTIONAL MATERIALS
(2019)
Article
Nanoscience & Nanotechnology
Chao Yuan, Kavin Kowsari, Sahil Panjwani, Zaichun Chen, Dong Wang, Biao Zhang, Cohn Ju-Xiang Ng, Pablo Valdivia y Alvarado, Qi Ge
ACS APPLIED MATERIALS & INTERFACES
(2019)
Article
Instruments & Instrumentation
Fangfang Wang, Chao Yuan, Dong Wang, David W. Rosen, Qi Ge
SMART MATERIALS AND STRUCTURES
(2020)
Article
Polymer Science
Biao Zhang, Honggeng Li, Chao Yuan, Martin L. Dunn, H. Jerry Qi, Kai Yu, Qian Shi, Qi Ge
JOURNAL OF APPLIED POLYMER SCIENCE
(2020)
Article
Materials Science, Multidisciplinary
Chao Yuan, Fangfang Wang, Biyun Qi, Zhen Ding, David W. Rosen, Qi Ge
MATERIALS & DESIGN
(2020)
Article
Materials Science, Multidisciplinary
Chao Yuan, Fangfang Wang, David W. Rosen, Qi Ge
Summary: The article introduces a new voxel design strategy for spatially customizing polymeric structures in additive manufacturing by constructing digital materials, which can adjust the material properties, and demonstrates structures with spatially tunable actuation speed and multiple stable configurations.
MATERIALS & DESIGN
(2021)
Article
Multidisciplinary Sciences
Qi Ge, Zhe Chen, Jianxiang Cheng, Biao Zhang, Yuan-Fang Zhang, Honggeng Li, Xiangnan He, Chao Yuan, Ji Liu, Shlomo Magdassi, Shaoxing Qu
Summary: This study presents a new multimaterial 3D printing approach for fabricating complex hybrid 3D structures consisting of hydrogels and UV-curable polymers, paving the way for multifunctional soft devices and machines.
Article
Engineering, Mechanical
Chao Yuan, Fangfang Wang, Qi Ge
Summary: The emerging direct four dimensional (4D) printing approach allows for the fabrication of complex 3D geometries from printed flat patterns, but faces challenges in achieving both large bending curvature and high loading capacity simultaneously. A multimaterial direct 4D printing method has been developed to address this issue, utilizing dehydration induced shrinkage and stiffening to create 3D structures with large bending curvature and high bending stiffness. This approach demonstrates advantages in terms of less building time and high load capacity compared to other 3D printing technologies.
EXTREME MECHANICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Biao Zhang, Honggeng Li, Jianxiang Cheng, Haitao Ye, Amir Hosein Sakhaei, Chao Yuan, Ping Rao, Yuan-Fang Zhang, Zhe Chen, Rong Wang, Xiangnan He, Ji Liu, Rui Xiao, Shaoxing Qu, Qi Ge
Summary: A mechanically robust and UV-curable SMP system has been developed for 4D printing, allowing the fabrication of high-resolution, highly complex 3D structures with large shape change upon heating. The developed SMP system exhibits excellent fatigue resistance and can be repeatedly loaded more than 10,000 times, significantly improving the mechanical performance of SMP-based 4D printing structures for engineering applications such as aerospace, smart furniture, and soft robots.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Honggeng Li, Biao Zhang, Rong Wang, Xiaodan Yang, Xiangnan He, Haitao Ye, Jianxiang Cheng, Chao Yuan, Yuan-Fang Zhang, Qi Ge
Summary: The upcycling method of vitrimer wastes reported in this study utilizes a UV curable recycling system to enable 3D printing and heat treatment, enhancing mechanical properties and expanding the application scope of the recycled material.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Fangfang Wang, Feixiang Luo, Yuanxin Huang, Xiaoshan Cao, Chao Yuan
Summary: This article proposes an efficient and economical 4D printing method that allows for prompt shape change under heat stimulus. By optimizing FDM processing parameters, complex 3D structures with flexibility and high fidelity can be directly constructed, significantly reducing construction time and process complexity.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Engineering, Electrical & Electronic
Ela Sachyani Keneth, Rama Lieberman, Avishag Pahima, V. B. Varma, Vinay Sharma, Chao Yuan, Qi Ge, R. V. Ramanujan, Shlomo Magdassi
Summary: Soft robots with flexible magnetic actuators are capable of delicate and sensitive movements. This study introduces a new method of fabricating 2D and 3D magneto-thermal actuators using a printing process. These actuators can be remotely and wirelessly activated by an alternating magnetic field, and demonstrate excellent performance in shape morphing. The findings suggest the potential of these magneto-thermal actuators in soft robotics, addressing the need for wireless and remote activation.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Materials Science, Multidisciplinary
Chao Yuan, Tongqing Lu, T. J. Wang
Summary: Four-dimensional (4D) printing is an emerging technology that enables time-dependent transformation of additive manufactured objects. This review classifies reported 4D printing works based on the mechanics principle that yields 2D-3D transformation. It comprehensively explores the interconnections among different 4D printing strategies and identifies challenges in mechanical design, printing techniques, and material synthesis.
FORCES IN MECHANICS
(2022)
Article
Chemistry, Physical
Honggeng Li, Biao Zhang, Kai Yu, Chao Yuan, Cong Zhou, Martin L. Dunn, H. Jerry Qi, Qian Shi, Qi-Huo Wei, Ji Liu, Qi Ge
Article
Chemistry, Multidisciplinary
Biao Zhang, Chao Yuan, Wang Zhang, Martin L. Dunn, H. Jerry Qi, Zhuangjian Liu, Kai Yu, Qi Ge
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)
