Article
Mathematics, Applied
Jianxun Zhang, Haoyuan Guo
Summary: This paper investigates the low-velocity impact of rectangular foam-filled fiber metal laminate (FML) tubes through theoretical analysis and finite element simulation. It provides simple analytical solutions for the dynamic response of these tubes and discusses the effects of metal volume fraction, metal layers, and foam strength on the dynamic response in detail. The accuracy of the analytical solutions and numerical results is confirmed through mutual validation.
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
(2021)
Article
Materials Science, Composites
Fukai Zhang, Yuan Lin, Jian An Wu, Zhongwei Zhang, Yaxin Huang, Cong Li, Mingyang Wang
Summary: This study investigates the effects of stacking sequence on the low-velocity failure mechanisms and energy dissipation characteristics of carbon fiber reinforced plastics/aluminum hybrid laminates. The results indicate that the plastic deformation of aluminum layers plays a dominant role in energy dissipation. Stacking aluminum layers on the exterior surface can increase absorbed impact energy and reduce fracture behavior.
POLYMER COMPOSITES
(2022)
Article
Mechanics
Soroush Azhdari, Sajjad Fakhreddini-Najafabadi, Fathollah Taheri-Behrooz
Summary: This study focused on investigating the damage mechanism of fiber metal laminates under low-velocity impact, utilizing both numerical simulation and experimental validation. Results showed good agreement between simulations and experiments, providing valuable insights into predicting damage initiation and development in such materials.
COMPOSITE STRUCTURES
(2021)
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
Engineering, Civil
Azadeh Fathi, Gholamhossein Liaghat, Hadi Sabouri
Summary: This study demonstrates that incorporating 0.2 wt% of graphene nanoplatelets significantly improves the impact resistance of fiber metal laminates, enhancing adhesion between resin/fibers and composite plies, reducing damage area, and increasing penetration threshold. Additionally, reinforcing composite panels considerably enhances impact behavior compared to unmodified composites.
THIN-WALLED STRUCTURES
(2021)
Article
Materials Science, Composites
Jing Ye, Yan Gao, Yushan Wu, Cheng Liu, Jiale Dong, Huan Wang, Bo Su, Hua-Xin Peng
Summary: A new method called nano-scale electrochemical sculpture (NES) has been developed to enhance the bonding strength of fiber metal laminates (FMLs-NES). Through systematic investigation and comparison with traditional surface treatments, it has been found that FMLs-NES exhibits the smallest damage area and energy absorption, while maintaining structural integrity after impact. Finite element simulations have also provided insights into the impact damage progression and failure mechanisms, and the validated finite element model can be used to optimize the stacking sequence and predict residual strength after impact.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Jeffrey M. Staniszewski, Steven E. Boyd, Travis A. Bogetti
Summary: Ultra-high molecular weight polyethylene (UHMWPE) composites are commonly used in protective armor systems, and the design of such systems has traditionally relied on empirical studies, which can be costly and time consuming. A multi-scale, finite element-based representative volume element (RVE) approach has been developed to capture the ply-level material nonlinearity and strain-induced fiber reorientation of UHMWPE composites subjected to low-velocity impact (LVI) loading. This approach accurately predicts the impact performance of UHMWPE composite materials and can be used to evaluate various laminate architectures and processing conditions.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2022)
Article
Materials Science, Composites
Mohammad Amin Zarezadeh-mehrizi, Gholamhossein Liaghat, Hamed Ahmadi, Alireza Taherzadeh-Fard, Amin Khodadadi
Summary: This study investigates the effects of elastomers on fiber metal laminates (FMLs) under low-velocity impact loads. The addition of an elastomeric layer to conventional FMLs enhances structural toughness, pre-fracture deformation, and specific energy absorption, while reducing damage and maximum load. Placing the elastomer closer to the frontal face decreases maximum load and energy absorption capacity.
POLYMER COMPOSITES
(2022)
Article
Materials Science, Multidisciplinary
Yong Chen, Liming Chen, Qiong Huang, Zhigang Zhang
Summary: In FMLs, replacing aluminum with magnesium leads to faster perforation and energy dissipation, but also reduces delamination damage at the metal-composite interface.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2021)
Article
Engineering, Mechanical
Shuai Zhu, Wenfei Peng, Yiyu Shao, Shujian Li
Summary: This paper conducted experiments and finite element method (FEM) simulations of high-velocity hail impact on carbon fiber reinforced aluminum alloy laminates (CARALL). CARALL were prepared using an autoclave process after surface anodizing. The hail impact tests were conducted with different impact velocities, impact angles, and ply sequences using a light gas gun. The FEM model of the high-velocity impact was established and verified by comparing with experimental results. The effects of different parameters on the hail impact resistance of CARALL were studied based on energy absorption and internal damage mechanism.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Mechanics
Jianxun Zhang, Qinghua Qin, Jiangtao Zhang, Hui Yuan, Jinlong Du, Hua Li
Summary: This study investigates the low-velocity impact on clamped square sandwich plates composed of a metal foam core and fibre-metal laminate face-sheets using analytical and numerical methods. The impact behavior is formulated based on a modified rigid-plastic material approximation, with numerical simulations conducted and compared with analytical results. The influences of material parameters and impact location on dynamic behaviors are discussed in detail, providing an efficient and simple analytical method for predicting low-velocity impact on square FML sandwich plates.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Zhiyuan Zhu, Xiaobin Li, Rui Yang, Weimeng Xie, Degong Zhang
Summary: This study investigates the effect of titanium skin on energy dissipation in fiber metal laminate (FML) through a series of ballistic impact experiments. The results show that the perfectly inelastic collision of titanium skins dissipates 43%-62% and 17%-27% of the total energy at high-velocity penetration and ballistic limit, respectively. The compression-shear of the Kevlar interlayer dissipates 24%-27% of the total energy regardless of whether the FML has been penetrated. The numerical calculations also demonstrate that the ballistic limit increases approximately linearly with the relative titanium skin thickness when the front titanium skin of the FML is thicker. Moreover, a simple specific energy absorption prediction formula is proposed to evaluate the energy dissipation capacity of FML.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2023)
Article
Materials Science, Composites
Jipeng Zhang, Yue Wang, Wen Yang, Xiangjun Dai, Yuan Zhao, Guodong Fang
Summary: Fiber metal laminate (FML) is a damage-tolerant material that is widely used in the aircraft industry. This study designed and tested different types of glass fiber reinforced aluminum laminates (Glare) to understand their fracture performance and failure mechanism. It was found that increasing the content of glass fiber reinforced polymer (GFRP) positively contributes to the quasi-static fracture performance of Glare. However, increasing the thickness of aluminum is more effective in enhancing the fracture toughness and promoting delamination and fiber pull-outs. Additionally, a titanium-reinforced Glare exhibited superior fracture performance compared to basic Glare, as it transformed the fracture process to be titanium dominant.
POLYMER COMPOSITES
(2023)
Article
Engineering, Aerospace
Jian Jiang, Zhifang Zhang, Jiyang Fu, Hongxu Wang, Ching-Tai Ng
Summary: This paper proposes a damage constitutive model for composite laminates under impact loading that considers through-thickness compression failure. The study compares this model with those that do not consider through-thickness compression failure, aiming to improve impact response analysis and discuss the necessity of including such damage in simulations. The results show that the proposed constitutive model accurately predicts impact force, displacement, damage, and energy absorption of laminates, confirming the occurrence of through-thickness compression damage near the impact side. Longitudinal fiber and matrix tension damage primarily occur in the annular region around the impact center on the laminates' rear side.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Polymer Science
Fengyan Chen, Yong Peng, Xuanzhen Chen, Kui Wang, Zhixiang Liu, Chao Chen
Summary: The study focused on the ballistic resistance of GFRP laminates subjected to high-velocity impact, using a 3D model combining strain rate effect and Hashin failure criterion. Factors such as layer angle, stacking sequence, and proportion of different layer angles were considered, showing that the stacking sequence has a stronger influence on the ballistic resistance. Laminates with layer angles of 0 degrees/90 degrees and +/- 45 degrees demonstrated greater resistance, while adopting an equal proportion of different layer angles is beneficial for impact resistance.
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)