Article
Mechanics
Xiangxun Meng, Gaofeng Wei, Anqing Li
Summary: In this study, three-dimensional braided composites were used to improve the performance of a piezoelectric energy harvester. A theoretical model was established to simulate the output response of the harvester under different conditions. The results showed that the braided elastic layer greatly enhanced the mechanical performance of the harvester and adjusting the temperature and braided angle could optimize its inherent frequency.
INTERNATIONAL JOURNAL OF APPLIED MECHANICS
(2023)
Article
Mechanics
Liwei Wu, Feng Zhao, Yuanyuan Li, Xiaojun Sun, Shengkai Liu, Qian Jiang
Summary: For a long time, single fiber reinforced composites have suffered from low damage tolerance and brittle failure mode, restricting their further applications. Hybrid composites are emerging as a new focus of research to overcome these limitations. This study investigates the hybrid effect and progressive damage process of three-dimensional five-direction hybrid braided composites made of carbon and aramid yarn. The results show that hybrid composites exhibit a significant toughening effect compared to neat carbon composites, revealing the synergistic bearing mechanism and progressive damage process of multicomponent composites with complex textile structures.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Composites
Yousong Xue, Shuwei Huang, Baozhong Sun, Bohong Gu
Summary: This study investigates the electro-thermal coupling behavior of 3-D braided composite under direct current, with the temperature from Joule heat reducing electric resistance and contact resistance in the composite. The reduction range depends on the temperature effect on electrical conductivity, and a finite element analysis model was developed to demonstrate temperature distribution in the composite under a current density of 32 kA m(-2). The temperature decrease at the two ends of the composite sample compared to the center region is attributed to Joule heat generated from the electric resistance of carbon fiber tows, leading to non-uniform temperature distribution.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Mechanics
Yiwei Duan, Duoqi Shi, Changqi Liu, Xiaoguang Yang
Summary: In this paper, a novel aerodynamic-acoustic coupling model is proposed to investigate the influence of aeroelastic effects on the thermo-acoustic response of a three-dimensional, four-directional braided composite panel. The fatigue life under combined aerodynamic load and acoustic load is discussed by using a rainflow cycle counting method. The results show that aeroelastic not only transforms the movement form but also affects the fatigue life of the panel.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Yiwei Duan, Duoqi Shi, Changqi Liu, Xiaoguang Yang
Summary: This study presents a unique finite element method to analyze the snap-through response of three-dimensional four-directional braided composite panels subjected to aerodynamic loads. The research reveals that the depth of the potential well and the critical sound pressure level are influenced by the dynamic pressure, thereby affecting the snap-through motion of the panels. These findings not only contribute to predicting the fatigue life of the panels but also have practical implications for the design of hypersonic vehicles.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2023)
Article
Mechanics
Mohammadmahdi Abedi, Omid Hassanshahi, Joaquim A. O. Barros, Antonio Gomes Correia, Raul Fangueiro
Summary: This study focuses on the development of feasible self-sensing braided composite rods (BCRs) for structural reinforcement and damage monitoring. Different carbon-based conductive fillers were used to reinforce the BCRs, and their mechanical and self-sensing performances were evaluated. The results showed that DCF-reinforced BCRs are the optimum choice for developing a feasible, reliable, and economic structural health monitoring technique.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Textiles
Xinyu Gao, Qihang Wang, Baozhong Sun, Bohong Gu, Meiqi Hu
Summary: In this study, a new method for preparing the three-way integrated braided preform was reported. The compressive behaviors of the three-way braided composite tubes were tested to reveal the effects of the braided structure. It was found that reducing branch length or increasing braiding layers can improve the compressive strength and initial stiffness. The main damage mechanisms observed were yarn breakage, yarn debonding, and kink band. The uniform braided structure paves the way for the formation of a seamless braided structure with high compressive strength among the three branch tubes.
TEXTILE RESEARCH JOURNAL
(2023)
Article
Materials Science, Composites
Ya Wang, Zhi-Jian Li, Zheng-Guo Liu, Yun-Peng Yi
Summary: This article proposes a shell-based multiscale finite element model to predict the compressive and torsional properties of 3D four-directional (3D4d) braided composite shafts. The model considers the relation between equivalent ply angles and yarn structures and is validated experimentally. The results show that the major failure modes of 3D4d braided composite shafts are fiber tension and compression damages under compressive and torque loads, respectively.
POLYMER COMPOSITES
(2023)
Article
Metallurgy & Metallurgical Engineering
Jamal Arbaoui, Jeremie Aucher, Moussa Gomina, Joel Breard
Summary: This paper investigates the thermal and mechanical properties of a composite made from a combination of 2063-epoxy resin and three different braided carbon-fiber fabric reinforcements. The results show that adding nickel coated carbon and nickel-plated copper wires can enhance the thermal conductivity of the braided composites, but at the expense of lower mechanical properties.
ARCHIVES OF METALLURGY AND MATERIALS
(2022)
Article
Materials Science, Composites
Haibo Luo, Qian Wang, Yanchu Yang, Xiaohui He, Hui Feng, Ying Nie, Tao Li
Summary: This study investigates the tensile and compression properties of 3D5D braided composite circular tubes with preembedded titanium alloy licker-ins. The influence of braided angle, thickness, and configuration on the bearing capacity is analyzed, and the microdamage morphology and failure mechanism of the tube structure are examined. The findings provide important scientific basis for the lightweight and high-strength connection design for 3D braided composites in near-space aerostats.
POLYMER COMPOSITES
(2023)
Article
Mechanics
Anubhav Singh, Neil Reynolds, Elspeth M. Keating, Alastair E. Barnett, Steve K. Barbour, Darren J. Hughes
Summary: This study investigates the potential of improving the mechanical performance of braided composite beams through the introduction of local braid angle variations. It was found that axial braid angle tailoring results in equivalent flexural performance with a 24% reduction in part weight, while tailoring in the radial direction does not yield any improvement in mass-specific performance. Deformation analysis showed a comprehensive shift in deformation characteristics with axial braid angle variation in each layer.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Chen Zhang, Hui Gao, Jiajun Zhao, Yu Feng, Dongsheng Wen
Summary: This study proposes a novel framework for the direct three-dimensional simulation of coke deposition in complex channels, and visualizes the axial and circumferential deposition distributions. Using a detailed pyrolysis kinetic model and the MC-II coking model, predictive results for n-decane in a rectangular channel have been obtained, revealing two locations with heavy deposition rates. The acceleration resulting from the reduced cross-sectional area of the channel by the coke layer weakens the buoyancy effect. This framework is significant for the comprehensive investigation of the efficiency of regenerative cooling.
Article
Materials Science, Textiles
Xingzhong Gao, Danyang Wen, Amna Siddique, Tao Liu, Wei Fan, Hon Chen, JunXin Yu, Miao Cao
Summary: This study systematically investigates the flexural performance of 3-D braided open-hole composite (3DBOHC) considering open-hole diameter and preform size. The results indicate that damage initiates in the top surface of 3DBOHC and the failure mode changes from fiber breakage to interface debonding with increasing braiding angle. Additionally, the sensitivity of composite strength to drilling process reduces with increased braiding angle.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Thermodynamics
Jiawei Fang, Yongkai Quan, Bensi Dong
Summary: A parameterized modified three-dimensional four-directional (3D4d) braided composites unit cell model is developed and a high-precision computation approach is proposed. A parametric representative volume element (RVE) method is established based on the coupling braiding parameters and discrete anisotropic characteristics. The influence of different factors on the effective thermal conductivity (ETC) of 3D4d braided composites is evaluated.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Civil
Yisheng Liu, Xiaohan Chen, Zhenyu Wu, Lin Shi, Jianping Li
Summary: The effect of axial yarns on progressive bending damage of braided composite tubes was investigated in this study. Experimental tests and infrared thermography were performed on four specimens with different number and distribution of axial yarns. The results revealed that axial yarns can enhance the mechanical properties of the braided composite tube and the changes in infrared maximum temperature were correlated with the damage initiation and failure mechanism of the specimen.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Multidisciplinary
Zhi-yong Li, You-song Xue, Bao-zhong Sun, Bo-hong Gu
Summary: This study reports the ballistic impact damage of plain-woven laminates with different hybrid structures and stacking sequences. Experimental and finite element analysis results show that UHMWPE/Kevlar hybrid laminates with Kevlar layers as the front face have the highest energy absorption capacity.
DEFENCE TECHNOLOGY
(2023)
Article
Materials Science, Textiles
Wei Huang, Yousong Xue, Lingming Xue, Bohong Gu, Baozhong Sun, Wei Zhang
Summary: This paper investigates the electrical responses and electrical-mechanical behaviors of three-dimensional braided composites with different braiding angles under three-point bending load. The correlation between electrical resistance and damage of the composites is also examined. A proposed electrical-mechanical model based on the Weibull distribution function is found to validate the experimental results, providing a theoretical basis for structural health monitoring of three-dimensional braided composites using the electrical resistance change method.
TEXTILE RESEARCH JOURNAL
(2023)
Article
Materials Science, Composites
Wenjing Cao, Yuanyuan Wu, Bohong Gu
Summary: Impact damage distribution is crucial for designing composite structures with high-impact damage tolerances. In this study, the initiation, evolution, and distribution of impact damage in woven composites were investigated. The woven structure was found to greatly influence the damage propagation and the distribution of strain and stress. The high strength and straight arrangement of the weft yarn contributed to its high deformation resistance, large stress value, and wide stress distribution. On the other hand, the crimp of the warp yarn limited the stress distribution, leading to stress and damage concentration.
APPLIED COMPOSITE MATERIALS
(2023)
Article
Materials Science, Textiles
Feng Xu, Jing Long, Baozhong Sun, Bohong Gu
Summary: This study investigates the effects of thermo-oxidative aging on the strain rate sensitivity and compression failure mechanism of three-dimensional angle-interlock woven composites (3DAWCs) using digital image correlation technique and finite element analysis. The results demonstrate that the strain rate sensitivity of 3DAWCs decreases after thermo-oxidative aging. The aging effect also influences the damage initiation and strain localization behavior.
TEXTILE RESEARCH JOURNAL
(2023)
Article
Engineering, Civil
Zhongxiang Pan, Qinqin Zhao, Qingsong Wei, Zhenyu Wu, Ni Li
Summary: The effects of heat treatment on the multiple impact mechanical responses and damage behaviors of GF/PP/epoxy composites were investigated. Pre-impact heat treatment maintained the best performance at the 3rd impact, while post-impact heat treatment acted as a filler or healing agent but resulted in a reduction of mechanical properties due to the melting of polypropylene fibers. Under low-velocity impact, 3D woven composites were more sensitive to heat treatment, while the 2D woven laminated structure could withstand more impacts. At high strain rates, heat treatment caused polypropylene fibers to melt and recrystallize, creating global micro voids that inhibited the formation of localized macro shear cracks.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Civil
Yuanyuan Wu, Jinhui Guo, Limeng Xun, Baozhong Sun, Bohong Gu
Summary: This study reports the anisotropic low-velocity impact behaviors of 3D braided carbon fiber/epoxy composites after thermo-oxidative aging. The findings show that the loading in the out-of-plane direction has better resistance to aging degradation and more sensitive stiffness degradation.
THIN-WALLED STRUCTURES
(2023)
Article
Materials Science, Composites
Jing Long, Feng Xu, Yuanyuan Wu, Baozhong Sun, Bohong Gu
Summary: The mechanical behaviors of thermo-oxidative aged 3D braided composites are influenced by matrix degradation and crack evolution. The study investigates the degradation behaviors, crack propagations, and mechanical reduction mechanisms of three-dimensional five-directional (3D5d) braided composites under thermal oxygen coupling environment. The aging behaviors in a pure thermal environment were also analyzed for comparison. The results show that the presence of oxygen accelerates crack initiation and propagation, leading to a decrease in the mechanical properties of the composites.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Composites
Shuwei Huang, Junjie Zhang, Bohong Gu, Baozhong Sun
Summary: Thermal stress concentration, caused by the mismatch of coefficients of thermal expansion, plays a significant role in the fatigue and failure of composites. We demonstrated the practicality of fiber Bragg grating sensors and high-resolution digital image correlation technique for in-situ characterization of thermal strain field evolution in 3D angle-interlocked woven composites. Our study found that the CTE mismatch leads to stress localization at the interface and exhibits a periodic distribution within the 3DAWC. The thermal stress in the resin reaches a maximum of 22 MPa around Tg, close to half of its yield stress.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Jiajia Yu, Zhongxiang Pan, Qimao Cai, Fa Zhang, Zhenyu Wu
Summary: The open-hole tensile properties and failure mechanism of plain woven carbon fiber, glass fiber, and carbon/glass hybrid fiber composites under on-axis and off-axis loads were investigated. The numerical simulation provided a good explanation for the damage development. The carbon/glass hybrid composites showed improved failure strain and toughness compared to pure carbon fiber composites.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Materials Science, Composites
Dandan Fang, Jianhua Yan, Bohong Gu, Baozhong Sun
Summary: The impact and flexural properties of 3D five-directional braided carbon/glass hybrid epoxy composites were investigated. Different arrangements of carbon fiber and glass fiber in the axial yarn were examined, and it was found that the C/G(2) composite had higher impact energy absorption capacity, while the C/G(1) composite showed higher impact stress. The flexural properties of the C/C-a composite were the best, while the C/G(3) composite exhibited the poorest performance before impact. This study provides guidance for the structural design of composites in specific applications.
JOURNAL OF COMPOSITE MATERIALS
(2023)
Article
Materials Science, Textiles
Juan Fang, Junjie Zhang, Baozhong Sun, Bohong Gu
Summary: The mode I fracture behavior of three-dimensional braided carbon fiber/epoxy composites was investigated using the double-cantilever beam method. The effects of different loading rates on fracture behavior were compared. It was found that the braiding yarns prevent crack initiation and propagation, while the braiding structure causes crack bifurcation. The results show that the three-dimensional braided structure is effective in increasing fracture toughness.
TEXTILE RESEARCH JOURNAL
(2023)
Article
Materials Science, Textiles
Xinyu Gao, Qihang Wang, Baozhong Sun, Bohong Gu, Meiqi Hu
Summary: In this study, a new method for preparing the three-way integrated braided preform was reported. The compressive behaviors of the three-way braided composite tubes were tested to reveal the effects of the braided structure. It was found that reducing branch length or increasing braiding layers can improve the compressive strength and initial stiffness. The main damage mechanisms observed were yarn breakage, yarn debonding, and kink band. The uniform braided structure paves the way for the formation of a seamless braided structure with high compressive strength among the three branch tubes.
TEXTILE RESEARCH JOURNAL
(2023)
Article
Engineering, Civil
Limeng Xun, Shuwei Huang, Baozhong Sun, Bohong Gu
Summary: This study reports the initiation and development of torsional cracks in carbon-fiber 3D braided composite tubes. 3D digital image correlation and micro-CT techniques were used to observe the crack distribution and reveal the correlation with the braided structure. The study found that the torsional damage propagates along the helix of braided bundles and inhibits in the vertical direction within repeated braid units.
THIN-WALLED STRUCTURES
(2023)
Article
Mechanics
Zhiyong Li, Yousong Xue, Baozhong Sun, Bohong Gu
Summary: This study investigated the penetration behavior of hybrid carbon/Kevlar/UHMWPE fiber laminated composites and revealed their complex failure mechanisms. Finite element modeling was used to predict the impact-induced damages for the hybrid composites. The results showed that the energy absorption capability of the hybrid laminates can be improved by 16.4%.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Mechanical
Zhiyong Li, Yousong Xue, Baozhong Sun, Bohong Gu
Summary: Fiber hybrid is a promising strategy for improving the ballistic penetration behaviors of fiber-reinforced laminated composites. This study investigates the effect of hybridization ratios on the ballistic impact damage of carbon/Kevlar/UHMWPE hybrid laminates. The results provide important theoretical basis and experimental reference for designing and developing hard multiphase anti-impact composite structures.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
