Article
Materials Science, Multidisciplinary
Yunfei Deng, Rui Tian, Ang Hu, Huiru Jia, Yonggang Yang
Summary: The dynamic response of the S-shaped foldcore sandwich structure under high-velocity impact was investigated using experimental and numerical methods. The test results showed that the impact location influenced the failure modes and energy absorption of the core. The numerical simulations correlated well with the experimental results and reasonably predicted the failure modes and energy absorption.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Mechanical
Yunfei Deng, Yuan Yin, Huapeng Wu, Chunping Zhou, Xianzhi Zeng
Summary: In this study, M-type foldcore sandwiches were prepared using the molding and pressing process with fiberglass. The dynamic response and damage mechanism of the sandwich structures under low-velocity impacts were investigated, considering various impact positions and energy. The results showed that the position of impact significantly influenced the damage mode of the sandwich plate, with crush fracture and collapse failure at node position dissipating higher energy compared to tensile fracture at the base position. Numerical prediction was in good agreement with experimental results. The effects of geometric configuration were explored, and it was found that increasing the core thickness was a more effective method for lightweight design than increasing the thickness of the panel.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2023)
Article
Materials Science, Composites
Wentao He, Lingjun Xie, Shuqing Wang, Shihui Cao, Changzi Wang, Lu Yao
Summary: This paper investigates the dynamic response and failure mechanism of composite-metal sandwich structures under slamming impact through numerical simulation. The results show that the overall performance of the sandwich structure is mainly determined by the mechanical properties of the skin, and the damage is influenced by the slamming velocity and material constituent.
POLYMER COMPOSITES
(2022)
Article
Engineering, Civil
Yunfei Deng, Weiqi Zhang, Xianzhi Zeng, Xupeng Liang, Chunping Zhou
Summary: In this study, a glass fiber foldcore sandwich panel was prepared using the hot pressing method and bonded with aluminum alloy panels. The impact response of the sandwich panel under low-velocity impact and the influence of foam filling on the impact response were investigated. The experimental results showed that the impact position significantly affected the damage mechanism and the filling foam had different effects on the impact response at different positions of the sandwich panel.
THIN-WALLED STRUCTURES
(2022)
Article
Mechanics
Muhammad Basha, A. Wagih, A. Melaibari, G. Lubineau, A. M. Abdraboh, M. A. Eltaher
Summary: This article investigates the damage modes of CFRP/wood sandwich composites during low velocity impact and compression after impact, focusing on different wood core types and wood fiber orientations. Results show that the laminate with balsa core wood exhibits higher impact load and dissipated energy, while the laminate with birch core wood has slightly larger CAI strength. Specific impact load, dissipated energy, and CAI strength of balsa core laminate are significantly higher compared to birch core laminate.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Yong Chen, Xianzhi Zeng, Yunfei Deng, Gang Wei
Summary: A novel all-composite sandwich structure with S-type composite foldcore was designed and fabricated. Impact tests were conducted on the sandwich structure with varying impact locations. The results showed that impact position had a significant influence on the impact resistance and damage mode. A three-dimensional progressive damage mode was developed to predict the damage evolution of the composite structure, which agreed well with experimental results.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Civil
Yunfei Deng, Xiang Li, Xiaoyu Hu, Huapeng Wu, Chunping Zhou, Pengcheng Lu
Summary: This paper experimentally investigates the impact responses of carbon/glass hybrid S-shaped foldcore sandwich structures. The results show that the damage mode of the sandwich panel gradually changes with the increase of impact energy, and the addition of glass fabric improves the energy absorption capacity and perforation threshold.
THIN-WALLED STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Yunfei Deng, Yuan Yin, Xiaoyu Hu, Xiang Li
Summary: The foldcore sandwich structure is considered a promising alternative to conventional honeycomb sandwich structure in the field of lightweight structures. A new M-type glass fiber foldcore structure was fabricated and its low-velocity impact characteristics were investigated. The results showed that the sandwich panel could withstand impactors longer than the foldcore span and the impact energy had an influence on the response characteristics of the structure. Additionally, improving the impact resistance of foldcore sandwich can be achieved by reducing the core span and increasing the number of laminations.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Materials Science, Composites
Yunfei Deng, Xiaoyu Hu, Xiaoyue Yang, Ziqiang Huang, Yuetong Wang, Chunping Zhou
Summary: This study experimentally investigated the impact resistance of the Nomex honeycomb sandwich structure under strong dynamic loading. By launching aluminum foam projectiles, the deformation process and failure modes of the sandwich panels were studied. The results showed that both the rubber-honeycomb and double-layer honeycomb sandwich structures effectively reduced the deflection change of the back face-sheet and improved the load-bearing capacity under strong load. Qualitative analysis can provide guidance for structural design.
POLYMER COMPOSITES
(2023)
Article
Mechanics
Wei Zeng, Weimin Jiang, Jiayi Liu, Wei Huang
Summary: This study fabricated a composite sandwich structure with reentrant honeycomb cores using a novel manufacturing method. The dynamic responses and failure mechanism of the structure under impulsive loading were investigated experimentally and numerically. The results showed that the sandwich structure with higher relative density exhibited better impact resistance.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Civil
Yuping E, Guang Yang, Xianmei Zhu, Guoxing Lu, Junjun Sun
Summary: This paper focuses on the flat-wise compression properties of foldcore sandwich paperboard with the Miura-ori pattern and compares it with conventional corrugated paperboard. The results show that the foldcore sandwich paperboard has higher specific energy absorption performance and potential for structural design of multilayered cushioning paper pads.
THIN-WALLED STRUCTURES
(2022)
Article
Thermodynamics
Shusen Li, Yan Zhang
Summary: In this work, a protective structure with 2A12T4 aluminum alloy and plywood as the panel material and core layer, respectively, was designed. The impact behavior, damage mode, absorbed energy, and residual strength of the interlayer after impact were studied through experiments and numerical simulations. The results can be used to guide optimal design of sandwich structures suitable for use under high-speed impact conditions.
ADVANCES IN MECHANICAL ENGINEERING
(2023)
Article
Engineering, Civil
Jianxun Zhang, Hui Yuan, Jianfeng Li, Jixing Meng, Wei Huang
Summary: This paper investigates the dynamic response of multilayer curved aluminum honeycomb sandwich beams under low-velocity impact. The deformation process and final failure modes are observed and analyzed. Numerical calculations are performed and show good agreement with experimental results. The effects of core thickness, core-thickness gradient, and gradient of inscribed circle diameters on the load-carrying capacity and energy absorption of multilayer curved aluminum honeycomb sandwich beams are explored. The results suggest that adjusting the core thickness and curvature angle can effectively improve the energy absorption capacity and mitigation ability.
THIN-WALLED STRUCTURES
(2022)
Article
Chemistry, Physical
Mahfuz Bin Rahman, Lvtao Zhu
Summary: This study experimentally investigates the low-velocity impact response of three-dimensional integrated woven spacer sandwich composites. The results show that the stiffness and energy absorption capacity are significantly affected by the core pile's heights and impact energies. The face sheet thickness does not have a significant influence on the impact response. Different damage and failure mechanisms were observed under different impact energies.
Article
Engineering, Mechanical
Huihui Wang, Xuding Song, Mingkai Zhao, Yipin Wan
Summary: This study aims to explore the low velocity penetration dynamic response of foam aluminum sandwich panels. A three-stage penetration model is established based on experimental results. The load and displacement time history, energy absorption and initial failure mode of the sandwich panel during penetration are theoretically predicted using the principle of energy conservation, minimum potential energy and accumulating damage theory. Comparison with experimental results shows that the predicted failure load and deformation are within 10% of the experimental data. This paper provides an analytical method for studying the deformation failure mode and energy absorption mechanism of metal foam sandwich panels, which is helpful to improve the efficiency of metal foam sandwich panels in design.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Construction & Building Technology
Yunfei Deng, Rui Tian, Ang Hu, Huapeng Wu, Nan Zhou, Gang Wei
Summary: This paper investigates the impact resistance of S-shaped glass fiber composite foldcore sandwich structures and explores the influence of face sheet thickness and core thickness on the impact resistance of the sandwich structure.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Engineering, Civil
Jian Xue, Weiwei Zhang, Jing Wu, Chao Wang, Hongwei Ma
Summary: This study integrates a plate-type local resonator with varying free boundaries within a plate to convert the initial low-order global vibration modes into localized vibration modes. A novel semi-analytical method is proposed to analyze the free vibration of the plate with thickness and displacement discontinuities. The results show that by applying free boundary conditions, the low-order localized vibration frequencies can be significantly reduced without affecting the low-order global frequencies.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Merve Tunay
Summary: In recent years, there has been an increasing number of studies on the mechanical properties of sandwich structures manufactured with the Fused Deposition Modeling (FDM) method. However, there is still a lack of experimental data on the mechanical characteristics of FDM-manufactured sandwich structures under different thermal aging durations. In this experiment, the energy absorption capabilities of sandwich structures with different core geometries were investigated under various thermal aging durations. The results showed that the core topology significantly influenced the energy absorption abilities of the sandwich structures.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Zi-qin Jiang, Zi-yao Niu, Ai-Lin Zhang, Xue-chun Liu
Summary: This paper proposes a crosssection corrugated plate steel special-shaped column (CCSC) that improves the bearing capacity and overall stability of structural columns by using smaller material input. Through theoretical analysis and numerical simulation, the overall stability of the CCSC under axial compression is analyzed. The design method and suggestions for the stability of CCSC are put forward. Compared with conventional square steel tube columns, the CCSC has obvious advantages in overall stability and steel consumption.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Yong Zhang, Yangang Chen, Jixiang Li, Jiacheng Wu, Liang Qian, Yuanqiang Tan, Kunyuan Li, Guoyao Zeng
Summary: A hybrid TPMS method was proposed to develop a new TPMS structure, and the mechanical properties of different TPMS structures were studied experimentally and numerically. Results showed that the hybrid TPMS structure had higher energy absorption and lower load-carrying capacity fluctuation. Further investigations revealed that the topological shape and material distribution had significant influence on mechanical properties, and the hybrid additive TPMS structure exhibited significant crashworthiness advantage in in-plane crushing condition.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Tongfei Sun, Ye Liu, Kaoshan Dai, Alfredo Camara, Yujie Lu, Lijie Wang
Summary: This paper presents a series of experimental and numerical studies on the performance of a novel double-stage coupling damper (DSCD). The effects of damper configuration, friction-yield ratio (Rfy), and loading protocol on the hysteresis performance of the DSCD are investigated. The test results demonstrate that the arrangement of ribs in the DSCD increases its energy dissipation capacity. Numerical analysis reveals that the length of the friction mechanism and the clearance between the yield segment and the restraining system affect the energy dissipation and stability of the damper.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Jeonghwa Lee, Young Jong Kang
Summary: This study investigates the local buckling behavior and strength of I-shape structural sections by considering flange-web interactions through three-dimensional finite element analysis. The study provides a more reasonable estimation of local buckling strength by considering the ratio of flange-web slenderness and height-to-width ratio, and presents design equations for flange local and web-bend buckling coefficients.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Yizhe Chen, Wenfeng Xiang, Qingsong Zhang, Hui Wang, Lin Hua
Summary: This study investigates the surface modification of a nickel plate to improve the bonding strength with carbon fiber-reinforced plastics (CFRP). The results show that different surface modification methods, including sandblasting, coupling agent treatment, and compound coupling agent treatment, significantly enhance the bonding strength of CFRP/Ni joints. The research provides insights into improving the connection between nickel and CFRP, as well as other heterogeneous materials.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Agha Intizar Mehdi, Fengping Zhang, Moon-Young Kim
Summary: A spatial stability theory of mono-symmetric thin-walled steel beams pre-stressed by spatially inclined cables is derived and its validity is demonstrated through numerical examples. The effects of initial tension, deviator numbers, inclined cable profiles, and bonded/un-bonded conditions on lateral-torsional buckling of the pre-stressed beams are investigated, with a specific emphasis on the effects of increasing initial tension.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Teng Ma, Jinxiang Wang, Liangtao Liu, Heng Li, Kui Tang, Yangchen Gu, Yifan Zhang
Summary: The structural response of water-back plate under the combined action of shock wave and bubble loads at water depths of 1-300 m was numerically investigated using an arbitrary Lagrange-Euler method. The accuracy of the numerical model was validated by comparing with experimental and theoretical results. The influences of water depth and length-to-diameter ratio of the charge on the combined damage effect were analyzed. The results show that as water depth increases, the plastic deformation energy of the water-back plate decreases, and the permanent deformation mode changes from convex to concave. When the charge has a large length-to-diameter ratio, the plastic deformation energy of the radial plate is higher than that of the axial plate, and the difference decreases with increasing water depth. Increasing the length-to-diameter ratio enhances the combined damage effect in the radial direction in deep-water environments.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Qiu-Yun Li, Ben Young
Summary: This paper investigates the flexural performance of CFS zed section members bent about the neutral axis parallel to the flanges through experimental and numerical analysis. The results show that the current direct strength method generally provides conservative predictions for the flexural strength of unstiffened zed section members, but slightly unconservative design for edge-stiffened zed section beams. The nominal flexural strengths of zed section members with edge stiffeners were found to be underestimated by 17% to 21% on average. Modified DSM formulae are recommended for the design of CFS zed section beams.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Weinan Gao, Bo Song, Xueyan Chen, Guochang Lin, Huifeng Tan
Summary: This paper presents a precise method for predicting deformation in large-scale inflatable structures, utilizing finite element modeling and laser scanning technique. The study shows a good agreement between the predictive model and non-contact measurement results.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Fei Gao, Zongyi Wang, Rui Zhu, Zhenming Chen, Quanxi Ye, Yaqi Duan, Yunlong Jia, Qin Zhang
Summary: This research investigates the mechanical properties of high-strength ring groove rivet assemblies and the load resistances of riveted T-stubs. Experimental tests reveal that Grade 10.9 rivets have higher yield strength and strain, and lower ultimate strain, making them suitable for high-strength ring groove rivet connections. Increasing the rivet diameter benefits the T-stubs, while increasing the flange thickness is not always advantageous. The Eurocode 3 method is not suitable for T-stubs connected through ring groove rivets, while the Demonceau method is conservative.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Shangchun Jiang, Liangfeng Sun, Haifei Zhan, Zhuoqun Zheng, Xijian Peng, Chaofeng Lue
Summary: This study investigates the bending behavior of two-dimensional nanomaterials, diamane and its analogous structure TBGIB, through atomistic simulations. It reveals that diamane experiences structural failure under bending, while TBGIB bends elastically before undergoing structural failure. The study provides valuable insights for the application of these materials in flexible electronics.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Qiang Zhang, Jianian Wen, Qiang Han, Hanqing Zhuge, Yulong Zhou
Summary: In this study, the mechanical properties of Q690 steel H-section columns under bi-directional cyclic loads are investigated, considering the time-varying characteristics of corrosion. A refined finite element (FE) model is built to analyze the degradation of mechanical property and failure mechanisms of steel columns with different design parameters during the whole life-cycle. The study proposes a quantitative calculation method for the ultimate resistance and damage index of steel columns, taking into account the ageing effects. The findings emphasize the importance of considering the ageing effects of steel columns in seismic design.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Yuda Hu, Qi Zhou, Tao Yang
Summary: The magneto-thermo-elastic coupled free vibration of functionally graded materials cylindrical shell is investigated in this study. The vibration equation in multi-physical field is established and solved using the Hamilton principle and the multi-scale method. The numerical results show that the natural frequency is influenced by various factors such as volume fraction index, initial amplitude, temperature, and magnetic induction intensity.
THIN-WALLED STRUCTURES
(2024)