Most Viewed

Published in last 1 year |  In last 2 years |  In last 3 years |  All

All

Please wait a minute...


For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails

Select

Advances in the application research of thermoplastic composites in the aerospace field LIU Daijun, MA Xiaoyi COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (8): 142-147.   DOI: 10.19936/j.cnki.2096-8000.20250828.017 Abstract （371）      PDF （3527KB）（434）       Knowledge map    Save Thermoplastic composites (TPC) have the characteristics of light weight, high strength and recyclability. They are one of the key materials to achieve the goal of Net Zero. They can be used in key components such as aircraft fuselages and wings, and have great application potential in the aviation field. This article describes the application of TPC in the aviation field, reviews the research progress of TPC, summarizes the key technologies and development trends of TPC, and finally summarizes and prospects the future development and challenges of TPC from the perspectives of materials, equipment, processes, and applications. Reference | Related Articles | Metrics

Select

High strain rate impact behaviour of epoxy resins at different temperatures ZOU Kai, LIU Zheng, ZHAO Changfang, LIU Hao, LIU Chen, ZHANG Kebin COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (8): 1-7.   DOI: 10.19936/j.cnki.2096-8000.20250828.001 Abstract （308）      PDF （4900KB）（452）       Knowledge map    Save In order to study the dynamic compressive mechanical properties of epoxy resin under high strain rate loading and different temperatures, the yield stress of epoxy resin with strain rate of 0.001 s -1 was obtained through quasi-static test, and then the dynamic compression test of epoxy resin was conducted by SHPB method. The stress-strain curves under uniaxial compression at temperatures of 25 ℃, 50 ℃ and 70 ℃ and strain rate of 1 000 s -1, 2 500 s -1, 3 000 s -1 were obtained, and the dynamic constitutive relations including strain rate effect and temperature effect of epoxy resin at high strain rate were obtained. The results show that the epoxy resin has strain rate effect, and the development trend of the stress-strain curves of the three high strain rates is the same. Finally, the relationship between yield stress, temperature and strain rate was fitted to describe the relationship between yield stress and temperature of epoxy resin at high strain rate. Based on this, the established constitutive model considering the influence of strain rate and temperature can well describe the stress-strain relationship of epoxy resin at high strain rate, and the research results can provide references for the study of constitutive model of epoxy resin. Reference | Related Articles | Metrics

Select

Research progress on 3D printing technology of continuous fiber reinforced composites based on FDM GUAN Bowen, ZHANG Daijun, WANG Chengbo, YANG Fanghong, YE Lu, CHEN Xiangbao COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (11): 145-152.   DOI: 10.19936/j.cnki.2096-8000.20251128.018 Abstract （297）      PDF （4592KB）（610）       Knowledge map    Save Continuous fiber reinforced composites (CFRCs) are widely recognized in fields like aerospace, automotive manufacturing, and microelectronics due to their advantages of lightweight, high strength, and high design freedom. 3D printing technology is regarded as an effective approach for achieving rapid, customized, and integrated manufacturing of CFRCs with complex structures. This paper, based on the fused deposition modeling process, introduces the factors affecting the performance of CFRC 3D-printed parts, including printing equipment, raw materials, and printing processes. It also summarizes the research progress of CFRCs in structural-functional design and multiscale performance analysis, as well as their current applications in various fields. Furthermore, it analyzes the current challenges in CFRCs research and discusses prospects for future development. Reference | Related Articles | Metrics

Select

Advances in the application of ultra-high molecular weight polyethylene fibers in ballistic and blast-resistant composite materials ZHAO Lili, JIANG Bo, ZHAO Liang, CAO Yiru, SU Jiakai, LIU Meina COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (10): 60-67.   DOI: 10.19936/j.cnki.2096-8000.20251028.009 Abstract （266）      PDF （942KB）（359）       Knowledge map    Save Ultra-high molecular weight polyethylene fibers have become a core component in ballistic and blast-resistant composite materials due to their high specific strength, lightweight nature, and excellent energy absorption capabilities. This paper provides an in-depth analysis of the properties of UHMWPE fibers and their critical role in the protective mechanisms of composite materials. It systematically reviews recent advances and performance optimization strategies in key application areas such as ceramic composite armor, metal-based laminated structures, and hybrid systems. Particular emphasis is placed on innovative strategies—such as advanced surface functionalization, biomimetic gradient/multiscale architectures, and multifunctional integration—that have led to breakthroughs in enhancing interfacial strength, energy absorption efficiency, and resistance to multiple impacts. Despite significant progress, intrinsic challenges remain, including the material’s limited thermal resistance, the lack of core domestic production technologies for high-end fibers, and the need for cross-scale simulation and standardized evaluation systems. Future development trends are expected to focus on smart responsive composites, green and sustainable manufacturing, and integrated multifunctional materials. Reference | Related Articles | Metrics

Select

Moisture absorption behavior of epoxy resin cured products and its influence on the dielectric properties ZHANG Dujuan, LI Yafeng, LI Songming, LU Haijun COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (8): 66-73.   DOI: 10.19936/j.cnki.2096-8000.20250828.008 Abstract （251）      PDF （5649KB）（413）       Knowledge map    Save To investigate the moisture absorption behavior of epoxy resin and the changes in its dielectric properties post-absorption, the study developed epoxy resins with various structures by varying the type of curing agent. The moisture absorption rate of the cured materials was monitored under 70 ℃ water immersion conditions, and the dielectric properties were tracked. The results indicated that the moisture absorption process followed the Fick diffusion model, the type of curing agent affects the polarity and free volume of the cured material, the polarity determines the equilibrium moisture absorption rate of the resin, and the polarity and free volume jointly determine the diffusion coefficient of water molecules. The greater the polarity, the higher the moisture absorption rate of the resin equilibrium, and the easier it is for the polar groups to form hydrogen bonds with water molecules and hinder the movement of water molecules. The larger the free volume, the more diffusion channels the water molecule has, and the faster the diffusion. The dielectric properties of the cured matter are different with different curing agents, and the dielectric constant and loss tangent change linearly with the moisture absorption rate and are independent of the type of curing agent. Based on this research, a model was developed to predict the dielectric properties of epoxy resins as a function of their moisture absorption rates, with a deviation of no more than 10% between model predictions and actual measurements. Reference | Related Articles | Metrics

Select

Finite element simulation modeling and analysis of the dynamic physical processes involved in curing composite components SUN Siyuan, YANG Yong COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (8): 97-103.   DOI: 10.19936/j.cnki.2096-8000.20250828.011 Abstract （243）      PDF （6321KB）（384）       Knowledge map    Save Reinforced composite materials quickly rise to prominence in advanced material applications due to their lightweight nature as well as their exceptional resistance against high temperatures and corrosion. They are currently a focal point in researches related to advanced material science, such as high-speed rail technology and other emerging fields. This study aims to provide a more precise analysis of solidified dynamic physical simulations relating to composite components. In this study, we choose the COMSOL Multiphysics software to conduct comprehensive simulations on the temperature field and the solidification field of a C-beam structure. First, we establish simulation models about the temperature field and the solidification field of the C-beam structure. Second, we analyze the solidification dynamic physical process during the forming process of the composite material pressure vessel, using the numerical analysis of finite element under the preset attributes of the composite material molds and parts when the pressure vessel is formed. Finally, we acquire a deviation not above 2.5% through analyzing the simulation data. Meanwhile, this study proposes new directions on the optimizing the solidification process of composite material parts in pressure vessels through analyzing the temperature curves of the C-beam structure on five feature points. Reference | Related Articles | Metrics

Select

Effects of the polyurethane sizing agent on surface and its interfacial properties for the aramid fiber DENG Zhikang, ZHANG Peng, KONG Haijuan, YU Muhuo COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (10): 22-27.   DOI: 10.19936/j.cnki.2096-8000.20251028.004 Abstract （230）      PDF （7462KB）（272）       Knowledge map    Save Waterborne polyurethane (WPU) sizing agent was used to modify aramid fiber (AF) and improve the interfacial bonding properties for AF and thermoplastic polyurethane (TPU) resin. The structure, surface element composition and morphology of AF were characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and scanning electron microscopy. The results showed that WPU sizing agent was successfully coated on the AF surface. The effects of WPU content on the surface energy, interlaminar shear strength of aramid fibers and TPU were studied. It is found can improve the surface roughness and surface energy of fiber surface with various WPU content. When the content of WPU sizing agent is 0.8wt%, the surface energy of WPU-AF is increased by 28.91%, while the interlaminar shear strength is 32.7 MPa, increased by 37.9%. Reference | Related Articles | Metrics

Select

Prediction of composite material cure deformation and mold surface optimization CHEN Heng, MA Xiuju, SUN Longgang, MAO Haifeng, ZHOU Xian COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (8): 104-110.   DOI: 10.19936/j.cnki.2096-8000.20250828.012 Abstract （225）      PDF （5480KB）（447）       Knowledge map    Save This paper establishes a multi-factor numerical model for the curing process of composite materials, exploring the temperature distribution of parts during resin curing using a thermo-chemical coupled heat transfer model. A constitutive model based on instantaneous linear elasticity theory, considering the evolution of material parameters, was used to describe the mechanical behavior of the material during the phase change process, predicting the curing deformation trend of end-rib honeycomb sandwich components. The reliability of the model was validated through experimental results. Based on the simulation analysis results, the tool surface was optimized. A comparative analysis was conducted between the parts prepared using the optimized tooling and the theoretical part surface. After tool optimization, the maximum deformation of the molded part’s surface compared to the theoretical part dimensions was reduced by 86.98%. Reference | Related Articles | Metrics

Select

Research progress on multi-dimensional cross-classification system and engineering application of flexible composite pipes LI Qing, FAN Huan, XU Han, LI Ruiying COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (8): 148-156.   DOI: 10.19936/j.cnki.2096-8000.20250828.018 Abstract （225）      PDF （4911KB）（380）       Knowledge map    Save Flexible composite pipes, as alternatives to traditional metal pipes, have attracted much attention in the fields of deep-sea oil and gas development and hydrogen energy transportation due to their advantages such as lightweight, corrosion resistance and high flexibility. This paper focuses on the material, structure and function of flexible composite pipes from a multi-dimensional cross perspective, and deeply analyzes the synergy mechanism among the three, aiming to provide a systematic reference for scientific research and practice in related fields. By sorting out the research trends of flexible composite pipes at home and abroad in recent years, this paper elaborates on the research progress from the classification system to the actual engineering application of flexible composite pipes, and at the same time makes prospects for the challenges and development directions it faces, in order to assist the continuous optimization and upgrading of infrastructure construction in the energy, chemical and other industries. Reference | Related Articles | Metrics

Select

Design and experimental study of carbon fiber composite multi-leaf springs for heavy truck suspension WANG Yi, HU Yefa, WANG Baokun, WU Shuihua, FU Kai, WEN Xianglong, ZHANG Jinguang COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (8): 118-124.   DOI: 10.19936/j.cnki.2096-8000.20250828.014 Abstract （223）      PDF （6965KB）（382）       Knowledge map    Save This paper introduces carbon fiber reinforced plastic (CFRP) into the design of heavy truck leaf springs and propose a CFRP multi-leaf spring structure. Using finite element simulation analysis to coordinate and match the strength and stiffness of CFRP multi-leaf springs, which yields a lay-up angle of [0 33/±75] 5 for the CFRP single leaf spring, and optimize the simulation model by bench test, used ABAQUS software to establish the optimized finite element simulation model and CAE to predict the stiffness and fatigue life of CFRP multi-leaf springs under the conditions of working load, ultimate load and fatigue loading, and carry out reliability analysis of CFRP multi-leaf springs. Reliability analysis is carried out to predict the stiffness and fatigue life of CFRP multi-leaf springs, and bench tests are carried out on CFRP multi-leaf spring test pieces. The results show that the mass of the CFRP multi-leaf spring is 34.4 kg, achieving a weight reduction of over 45%. Additionally, the stiffness of the CFRP multi-leaf spring does not decrease after 150 000 cycles of cyclic loading, and it can still withstand a load of 20 tons without damage. Reference | Related Articles | Metrics

Select

Investigation on the energy absorption mechanism and high-efficiency modeling method of carbon fiber reinforced composite structures WANG Kai, LUO Junjie, YAO Ruyang, PANG Tong, JIA Xiaohang, YU Lei COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (8): 24-32.   DOI: 10.19936/j.cnki.2096-8000.20250828.004 Abstract （216）      PDF （11826KB）（500）       Knowledge map    Save Failure mechanisms of carbon fiber reinforced polymer (CFRP) are complex, and fine-scale simulations are costly with low optimization design efficiency. To improve the simulation and optimization design efficiency of energy-absorbing components of carbon fiber composite materials, CFRP thin-walled square tubes were prepared and axial compressive crushing tests were conducted. A multi-layered and refined finite element model of the axial crushing of CFRP thin-walled square tubes was established, and the experimental and simulated failure modes and energy-absorption mechanisms were analyzed. A high-fidelity and high-efficiency equivalent modeling method was proposed. The experimental results showed that the energy-absorption mechanism of the progressive crushing failure mode of the CFRP thin-walled square tube is complex, mainly including fiber fracture, delamination, and frictional dissipation. The simulation results showed that the refined finite element model can accurately modelling the progressive crushing failure behavior and energy dissipation of the CFRP thin-walled square tube. Plastic deformation and damage are one of the main factors of energy dissipation. Based on the progressive crushing failure mode, the proposed modeling method can accurately predict the energy absorption response of the CFRP thin-walled square tube. The relatively fine modeling method has increased computational efficiency by 97%. Reference | Related Articles | Metrics

Select

Research on adaptive regularization damage identification (ARDI) method for composite laminate structure YANG Ying, SHI Qinghe, HU Kejun, ZHU Fuxian, DUAN Liuyang, ZHAO Fengling COMPOSITES SCIENCE AND ENGINEERING    2026, 0 (2): 1-9.   DOI: 10.19936/j.cnki.2096-8000.20260228.001 Abstract （206）      PDF （7885KB）（461）       Knowledge map    Save Composite laminate structures are widely used, and damage identification is of great significance to ensure the safety of structures and prolong their service life. In this paper, the element-level damage indicator is introduced to describe the change of the in-plane and out-plane upward stiffness of laminates. Aiming at the damage index, a two-step damage identification method was established, that is, the damage element was screened by the damage location index, and then the damage degree was identified by the optimization method. The regularization method was used for quantitative damage recognition. Since the traditional regularization method adopts uniform regularization parameters for each damage parameter, which is not conducive to the convergence and stability of the identification results. In this paper, an adaptive regularization damage identification (ARDI) method based on weighting coefficient is proposed, which can improve the identification efficiency while considering the stability of identification results. The effectiveness of the proposed method is verified by numerical examples, and the influence of the number of measurement points and noise level on recognition results is analyzed. The results of the proposed method are compared with the direct method and the traditional regularization method, and it is found that the dispersion of calculation results and the efficiency of the proposed method have obvious advantages. Finally, an experimental work was conducted to verify the effectiveness of the proposed method. Reference | Related Articles | Metrics

Select

Product performance analysis and process parameter optimization of needle-punched C/C composite material YANG Guoyong, LIU Zhenyu, ZHANG Nan, KONG Haoqiang COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (11): 79-85.   DOI: 10.19936/j.cnki.2096-8000.20251128.010 Abstract （205）      PDF （8324KB）（527）       Knowledge map    Save This research focuses on exploring the relationship between process parameters and the performance of carbon/carbon composite materials during the needle-punched process, employing a central composite design method to plan the experimental scheme. Using the response surface method to analyze the experimental data, a quadratic response model was established that correlates the bending strength of the product with needle-punched process parameters, including needling depth, needling density, and carbon fiber surface density. Based on this model, the process parameters were optimized and an analysis was conducted on the influence patterns of individual process parameters and their combined effects on the bending strength. The research findings indicate that the best parameters were a needling depth of 12 mm, a needling density of 17.81 needles/cm 2, and a carbon fiber surface density of 400 g/m 2. The study also reveals that the carbon fiber surface density had the most significant impact on bending strength, followed by the needling depth, while the effect of needling density is relatively minor. Furthermore, the study uncovers that the coupling effects between needling depth and carbon fiber surface density, as well as between needling depth and needling density, significantly influenced the bending strength. Through delving into the interactive effects of the process parameters, it is determined that the bending performance of the product is optimal when the needling depth is between 12~16 mm, the needling density is between 15~25 needles/cm 2, and the carbon fiber surface density is between 380~400 g/m 2, with the strength exceeding 100 MPa. These findings expand the needle punching forming process window for carbon/carbon composite materials, which helps to improve their forming efficiency and product quality. Reference | Related Articles | Metrics

Select

Structural performance research of wind turbine tower based on BIM+FEA WANG Ailing, ZHAO Ying, SUN Shaonan, XIAO Ying COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (8): 125-131.   DOI: 10.19936/j.cnki.2096-8000.20250828.015 Abstract （196）      PDF （6375KB）（325）       Knowledge map    Save Aiming at the structural response of the tower under complex loads and different working conditions, the structural performance of a 2 MW large-scale horizontal-axis wind turbine tower is analyzed by adopting the method of building information modeling(BIM)+finite element analysis(FEA). Firstly, the BIM model of wind turbine is parametrically established and the tower load is analyzed and calculated, then the tower BIM model is converted to finite element model, and finally the tower is simulated and analyzed in finite element software ANSYS. The results show that the maximum stress of the tower occurs at the bottom and the maximum displacement at the top of the tower. The first six orders of the tower’s intrinsic frequency do not resonate with the tower, and the intrinsic frequency of the tower decreases with the increase of the tower height. The intrinsic frequency of the tower decreases with the increase of the top mass of the tower, and the change of the top mass of the tower has less effect on the stress and top displacement of the tower and more effect on the intrinsic frequency of the tower. The research show that the BIM+FEA method can provide new ideas for the structural safety analysis of wind turbine towers, which can provide safety warning in the design and operation and maintenance of wind turbine towers, and provide effective data and information for managers’ decision-making. Reference | Related Articles | Metrics

Select

Time-domain constitutive modeling of viscoelastic composites based on asymptotic homogenization method WU Shunxin, ZHU Shuiwen COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (8): 8-14.   DOI: 10.19936/j.cnki.2096-8000.20250828.002 Abstract （195）      PDF （5361KB）（712）       Knowledge map    Save The aim of this paper is to establish an efficient and accurate method for modeling the macroscopic constitutive relationship of viscoelastic composites. By combining the asymptotic homogenization theory and the eigen-displacement method, a quantitative relationship between the microstructure and the macroscopic response is established. The reduced-order homogenization method is used to solve the characteristic displacement, which effectively improves the computational efficiency and directly obtains the macroscopic ontological relationship in the time domain. The obtained ontological relationship is embedded into the finite element software ABAQUS in the form of a user-defined material subroutine (UMAT), and the reliability of the model is verified by comparison with Digimat. The numerical results show that the fiber volume fraction and viscoelastic decay ratio have a significant effect on the stress relaxation behavior of the composites. As the fiber volume fraction increases, both the initial stress value and the stress relaxation rate of the composites increase; while the increase in the decay ratio leads to a slower stress relaxation rate. It is shown that the method can accurately predict the time-domain mechanical response of viscoelastic composites, which provides a strong theoretical support for the design and optimization of composites. Reference | Related Articles | Metrics

Select

Effect of resin properties and preparation processes on the anti-elastic properties of UHMWPE fiber/waterborne polyurethane composites ZHOU Ziyan, ZHAI Wen, DONG Bin, WEI Rubin COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (10): 34-40.   DOI: 10.19936/j.cnki.2096-8000.20251028.006 Abstract （192）      PDF （4866KB）（239）       Knowledge map    Save Using waterborne polyurethane as matrix and ultra-high molecular weight polyethylene (UHMWPE) fiber as reinforcement, unidirectional and orthogonal composite soft bulletproof layer was prepared. Based on ballistic penetration test and non-destructive testing, the effects of resin modulus, resin content, fiber development degree and other technological parameters on the elastic resistance of the soft bulletproof layer of advanced composites were studied. The results show that the UHMWPE composites prepared with low resin content, low modulus resin and proper placement rate present better ballistic penetration performance. The low resin content increases the fiber proportion, resulting in more fiber bearing capacity per unit surface density. The low modulus resin can reduce the stiffness of the composite, allowing more fibers to pull out and break in the affected area. Although the faster arrangement rate can improve the production efficiency, it will generate more tension and damage the fiber during the production process. By analyzing the influence of various factors on the ballistic properties of composites, the technological parameters of ballistic composites can be better designed and the soft bulletproof layer of advanced composites can be prepared. Reference | Related Articles | Metrics

Select

Study on the thermal-oxidative aging characteristics of aramid Ⅲ paper-based composites YAO Yunzhen, LIAO Sihuang, ZHANG Zheng, LONG Jin, WANG Yi, XIONG Zhiyuan, HU Jian COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (8): 33-42.   DOI: 10.19936/j.cnki.2096-8000.20250828.005 Abstract （188）      PDF （19944KB）（375）       Knowledge map    Save In this paper, aramid Ⅲ paper base paper was obtained by wet forming with aramid Ⅲ staple fiber and meta-aramid fibrid, and then the aramid Ⅲ paper base composite was obtained by impregnating polyimide resin, and then the aging experiments were carried out at 250 ℃, 300 ℃ and 350 ℃. The physicochemical structure, mechanical properties and dynamic mechanical properties of Fang Ⅲ paper before and after aging were described. The results show that the chemical structure of aryl Ⅲ paper has no obvious change before and after aging at 250 ℃ and 300 ℃, and the amide bond breaks before and after aging at 350 ℃. For the physical structure of paper, with the increase of aging time and aging temperature, the quality loss and size loss of aromatic Ⅲ paper gradually become larger, and the paper surface defects such as holes and cracks appear. After aging at 250 ℃ for 408 h, the tensile strength and tear strength retention rates of Fang Ⅲ paper were 111% and 115%, respectively. After 312 h aging at 300 ℃, the tensile strength and tear retention rate of aromatic Ⅲ paper decreased to 53% and 23%, respectively. After aging at 350 ℃ for 168 h, the tensile strength retention rate of aromatic Ⅲ paper was only 4%, the tear retention rate decreased to 14% after aging for 48 h, and decreased to 0 after 168 h. DMA shows that the loss factor transition temperature of aromatic Ⅲ paper increases gradually with the increase of aging time at 300 ℃, indicating that the molecular segment softness and viscosity of aromatic Ⅲ paper increase significantly at 300 ℃. Reference | Related Articles | Metrics

Select

Curing deformation simulation of foam sandwich composite C-shaped panels NIE Zhiwei, LUO Qi, HUO Yufan, ZHOU-HE Lezi, ZHOU Huamin COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (8): 86-96.   DOI: 10.19936/j.cnki.2096-8000.20250828.010 Abstract （188）      PDF （17988KB）（428）       Knowledge map    Save Based on the curing deformation mechanism of sandwich composites, a numerical simulation model of the curing deformation of sandwich composites was established for sandwich composite C-shaped contour panels. The simulation results show that at the beginning of demolding, the inner surface of the C-shaped profile plate is subjected to tensile stress while the outer surface is subjected to compressive stress, and the whole component shrinks inward. Based on this simulation model, the curing deformation law of the C-shaped contour panels under different process conditions, such as the type of material at the gap, the number of layers, and the angle of the layer, was investigated. It is found that the curing deformation is the smallest when the gap was not filled with any material, and the curing deformation was the largest when it is filled with composite material; the deformation is positively correlated with the number of layers within a certain range; the lay-up angle has little effect on the deformation. In addition, a number of C-shaped contour panels with the corresponding process conditions were molded, and the curing deformation of the panels was determined by three-dimensional scanning. The simulation conformed well to the experiment, thus verifying the accuracy of the simulation model and realizing the accurate prediction of the curing deformation of C-shaped contour panels. Reference | Related Articles | Metrics

Select

A brief review of the automated lay-up processing property of thermosetting prepregs tackiness LU Kangyi, FENG Bin COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (10): 114-122.   DOI: 10.19936/j.cnki.2096-8000.20251028.017 Abstract （185）      PDF （9566KB）（201）       Knowledge map    Save Automated lay-up of prepregs is a crucial processing technique for manufacturing high-performance composites in aerospace industry. The quality, efficiency, and stability of automated lay-up is significantly influenced by the processing properties of prepregs, which are commonly evaluated by tackiness and drapability. This article provides a description of the formation of prepreg tackiness and an analysis of internal and external influencing factors as well as the mechanism. The major quantitative testing methods for tackiness and the domestic current progress in manufacturers and applications are summarized. And the application prospect on prepreg tackiness is outlined. Reference | Related Articles | Metrics

Select

Gradient design and ballistic performance of hybrid fiber composites ZHANG Huihui, QIN Bin, DONG Fangdong COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (10): 28-33.   DOI: 10.19936/j.cnki.2096-8000.20251028.005 Abstract （182）      PDF （7645KB）（275）       Knowledge map    Save This study investigated the influence of gradient design on the ballistic performance of aramid fiber and ultra-high molecular weight polyethylene (UHMWPE) fiber hybrid composites. Five gradient schemes with varying UHMWPE content (corresponding to 0, 10, 20, 30 and 40 layers) were designed, with the total areal density strictly controlled below (6±0.05) kg/m 2 for all configurations. Ballistic tests were conducted, utilizing both aramid and UHMWPE as the impact faces, to systematically analyze the effects of fiber content and stacking sequence on the ballistic limit velocity V 50 and ballistic performance index (BPI) of the laminates. Based on the experimental data, a cubic nonlinear regression quantitative relationship model ( R 2>99%) between fiber content and ballistic performance is established,which provides a scientific basis for the gradient design of hybrid fiber composites and the development of ballistic protection equipment. Reference | Related Articles | Metrics

Select

Performance analysis of FRP grid reinforced fiber concrete sandwich composite wall panels CHENG Nengming, ZHANG Yaolin, CHANG Mingyuan, ZHANG Rong COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (11): 122-130.   DOI: 10.19936/j.cnki.2096-8000.20251128.015 Abstract （175）      PDF （12156KB）（387）       Knowledge map    Save To explore new wall panel materials and structural systems that are lightweight, high-strength, and have good thermal insulation properties suitable for prefabricated steel structure buildings, a new type of FRP grid reinforced fiber concrete sandwich composite wall panel was proposed in this paper, referred to as an FGRC sandwich composite wall panel. To study the flexural performance and failure modes of the FGRC sandwich composite wall panels, bending performance tests were designed and conducted on two FGRC sandwich composite wall panels with dimensions of 4 m×3 m and thicknesses of 100 mm and 150 mm respectively. The test results show that the main failure mode of the FGRC sandwich composite wall panels is flexural failure, with excellent interface connection performance. The ultimate flexural load capacity can reach up to 3.11 kN/m 2 and 4.05 kN/m 2. The ultimate fire resistance times are 1.1 hours and 1.5 hours, and the structural thermal resistances are 1.41 (m 2·K)/W and 1.72 (m 2·K)/W, respectively. The air-borne sound insulation and frequency correction amounts are 39(-2;-3) dB and 39(0;-2) dB, respectively. Overall, this wall panel shows significant application value. Reference | Related Articles | Metrics

Select

A novel approach for impact load identification on composite material structures using truncated vibration response ZHANG Li, YANG Xiaoming, JIANG Quanxin COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (11): 1-7.   DOI: 10.19936/j.cnki.2096-8000.20251128.001 Abstract （174）      PDF （8749KB）（408）       Knowledge map    Save Identification of impact load on composite material structures is the second-category inverse problem in structural dynamics, prone to significant deviations due to the influence of measurement noise and modeling errors. To address this issue, this paper proposes a novel method for the precise identification of impact load based on truncated vibration responses. Firstly, the complete vibration response is decomposed into multi-scale intrinsic mode functions using variational mode decomposition (VMD), thereby eliminating high-frequency modes and measurement noise to obtain a truncated vibration response that contains only the low-order principal frequency components of the structure. Subsequently, the truncated singular value based least squares method is employed to extract the truncated modal constant vector of the impact location from the truncated vibration response to realize impact localization. Finally, based on the localization results, the collinearity factor of the modal constant vector is estimated, thus completing the inversion of the impact intensity. Experiments on a real wing show that the proposed method can achieve a localization success rate of up to 86.67% by using the truncated vibration response composed of the first three modal acceleration responses of the wing with merely a single accelerometer, and the average peak relative error index of force reconstruction is only 6.51%. Reference | Related Articles | Metrics

Select

Low-velocity impact behavior of hybrid composites based on carbon/glass hybrid triaxial woven fabric CUI Zihan, ZHANG Honghua, LI Wei COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (12): 1-10.   DOI: 10.19936/j.cnki.2096-8000.20251228.001 Abstract （173）      PDF （41659KB）（229）       Knowledge map    Save In this paper, six types of carbon/glass hybrid triaxial woven fabric composite laminates with different carbon/glass mixing ratios were prepared using carbon fiber unidirectional fabrics and carbon fiber, glass fiber and carbon/glass hybrid triaxial woven fabrics. The impact energies of 18 J and 28 J were chosen to carry out low-velocity impact experiments on these six kinds of composite laminates. The surface damage on the front and back sides of the impact was obtained by visual measurement, and the overall damage area inside the specimen was obtained using ultrasonic C-scanning equipment, which was combined with the impact response curves to analyze the damage mechanism of the impact process of carbon/glass hybrid triaxial woven fabric composite laminates. The results show that at low impact energy, the maximum displacement growth during the impact of U C6 (TG) is the largest, with a growth value of 11.4%, and the absorbed energy of U C6 (TC) is the largest, with an enhancement of 7.6%; at high impact energy, the maximum displacement growth during the impact of U C6 (TG) is the largest, with a growth value of 15.9%, and the absorbed energy of U C6 (TCCG) is the largest, with an enhancement of 33.4%. Two damage patterns, ellipsoid-like and circular-like, existed in carbon/glass hybrid triaxial woven fabric composite laminates with 90° direction as the long axis. Reference | Related Articles | Metrics

Select

Effect of electrolyte oxidizability on the surface treatment of high-modulus carbon fibers GAO Dongxiao, KANG Yongchao, WANG Mengfan COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (12): 88-95.   DOI: 10.19936/j.cnki.2096-8000.20251228.012 Abstract （172）      PDF （10462KB）（104）       Knowledge map    Save Electrochemical anodic oxidation is an important method for enhancing the surface activity of high-modulus carbon fibers. To investigate the influence of electrolyte oxidizability on the surface treatment performance, five electrolytes with different oxidation potentials (NaOH, NH 4HCO 3, H 2SO 4, NaNO 2, and HNO 3) were employed to modify polyacrylonitrile-based high-modulus carbon fibers via anodic oxidation. The effects of electrolyte oxidizability on the physicochemical surface structure and interfacial properties of the fibers were systematically analyzed. The results show that with increasing oxidizability, the graphite layer expansion becomes more pronounced, the content of sp 3 carbon structures and oxygen-containing functional groups increases, and the surface chemical reactivity is significantly enhanced. This study reveals the key role of electrolyte oxidizability in the anodic oxidation process of carbon fibers and provides a theoretical basis for optimizing the surface structure of high-modulus carbon fibers. Reference | Related Articles | Metrics

Select

Optimization design of test tooling for composite sleeper based on multi-objective genetic algorithm XU Chen, ZHANG Qingkai, QIN Junfei, HUANG Cheng COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (11): 131-136.   DOI: 10.19936/j.cnki.2096-8000.20251128.016 Abstract （170）      PDF （6159KB）（433）       Knowledge map    Save A composite sleeper’s design load is 1 000 kN, it must meet deformation requirements of sleeper’s bending load. So the test tooling must be designed to meet the requirements of bending load. This paper established the response surface of target parameters to section sizes based on the theory of material mechanics and Kirging model. Based on this, the tooling was obtained by multi-objective genetic algorithm, and finally, was obtained the optimal combination of tooling’s section size. Then bending resistance of the tooling was calculated according to optimized section sizes by FEM. Thereafter, the tooling was manufactured based on the optimized section sizes. The result show that this tooling did not create any plastic deformation with a 1 000 kN load. Reference | Related Articles | Metrics

Select

Research on the friction characteristics and thermal capacity of C/C-SiC composite materials applied to the friction blocks for 600 km/h maglev train LIU Peng, LI Yang, YUAN Yuqing, LI Pengtao, YUAN Minge, ZHANG Jinyu, ZHENG Yong, XIAO Peng COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (8): 111-117.   DOI: 10.19936/j.cnki.2096-8000.20250828.013 Abstract （170）      PDF （8701KB）（326）       Knowledge map    Save C/C-SiC composite materials have been used as skid shoes and have operated safely at 430 km/h on the Shanghai High-Speed Maglev Demonstration Line for nearly 20 years. With the advent of 600 km/h high-speed maglev trains, it is urgent to investigate the friction characteristics and thermal capacity analysis of C/C-SiC composite material friction blocks for application in 600 km/h maglev trains. This paper first obtains the friction coefficient and temperature rise characteristics of the C/C-SiC composite material through 600 km/h high-speed friction tests. Under the test conditions of 600 km/h, a Z-direction pressure of 4 kN, and continuous friction for 8 min, the highest temperature recorded by the sensor reached 569.2 ℃ and tended to stabilize, which is far below the material’s allowable temperature limit. The average friction coefficient is below 0.1, meeting the technical requirement of minimizing the friction coefficient in high-speed friction environments. Using a thermal capacity simulation calculation method to replicate the high-speed friction test temperatures, the distribution coefficient of the friction heat flux density between the C/C-SiC composite material and the rail wheel is determined to be 0.020 54. Based on this parameter, the simulation predicts the temperature characteristics of the C/C-SiC composite material when it drags at 600 km/h for 300 km in the event of a suspension failure in the high-speed maglev train, providing support for the design optimization and engineering application of 600 km/h high-speed maglev trains. Reference | Related Articles | Metrics

Select

Research on the strength and damage of bolted joint of thin plate composites LI Jie, BAO Zuguo, LI Qi, SUN Xiaowang, ZHOU Qiang, WANG Xianhui COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (11): 8-19.   DOI: 10.19936/j.cnki.2096-8000.20251128.002 Abstract （169）      PDF （22858KB）（336）       Knowledge map    Save In this paper, the strength and damage process of composite thin plate bolted joint structures under tensile loading are investigated by experimental and simulation analysis. Firstly, the basic performance parameters of the composites were obtained by standard mechanical tests, and then tests were carried out on thin-plate composite joints with varying bolt preloads, different layup configurations, and both single and double bolt distributions. Based on the stiffness continuous degradation model and the three-dimensional Hashin failure criterion, the bolt preload was reverse-calculated by testing the friction between the overlap plates, and the preload of the bolt was simulated using an equivalent cooling method. Calibration of the open-hole plate was performed through both experiments and simulations, leading to the development of a three-dimensional finite element model of the bolted composite laminate. Finally, a progressive failure analysis was conducted to understand the strength and damage mechanisms of the composite plate joints. The results indicated that: with the increase of bolt preload, the peak load of the thin plate composite joint increases and the fracture displacement decreases; the damage process of the thin plate composite joints with different layups is related to the proportion of their layups; the ultimate load of transverse double-bolt joints is approximately twice as much as that of the single-bolt joints, and the ultimate limit of longitudinal double-bolt joints is slightly lower. Reference | Related Articles | Metrics

Select

Performance study of single-component waterborne epoxy resin-based ultra-high molecular weight polyethylene fiber composites SHEN Quanjin, ZHOU Sumeng, OUYANG Shaoping COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (10): 73-76.   DOI: 10.19936/j.cnki.2096-8000.20251028.011 Abstract （168）      PDF （915KB）（294）       Knowledge map    Save A one-component waterborne epoxy resin (WER) suitable for ultra-high molecular weight polyethylene (UHMWPE) fiber non-woven fabric was synthesized. Unidirectional (UD) orthogonal non-woven fabric and composite panels were prepared using a winding-composite-hot pressing process. The resin’s resistance to high/low temperatures and aging properties were investigated, along with the storage stability of WER-based UHMWPE non-woven fabrics under accelerated aging tests. The mechanical performance of composite panels at different temperatures and the ballistic limit V 50 value were also studied. The results indicate that the epoxy resin exhibits favorable high temperature resistance, the tensile shear strength of WRE resin is maintained at a high level at 80 ℃,and at a low temperature of -40 ℃, the performance does not decrease compared with the normal temperature state. Through accelerated aging simulations and calculations using the Arrhenius equation, the epoxy adhesive demonstrates performance attenuation after approximately 279 days in a 23 ℃ environment. The WER-based non-woven fabric displays excellent storage stability, maintaining stable performance for about 117 days under 23 ℃ conditions. Evaluated through V 50 ballistic testing, the ballistic performance of WER matrix composites was almost unchanged after 400 h with testing under double 85 conditions. Reference | Related Articles | Metrics

Select

Application of polyborosiloxane shear-shickening gel in bulletproof and explosion-proof fields SU Jiakai, JIANG Bo, LIU Meina, RONG Zhizong, CAO Yiru, ZHAO Lili COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (10): 68-72.   DOI: 10.19936/j.cnki.2096-8000.20251028.010 Abstract （166）      PDF （971KB）（389）       Knowledge map    Save Polyborosiloxane shear-thickening gel (PBS-STG) is an intelligent material that combines shear-thickening properties with high stability. Its unique dynamic cross-linked network structure enables rapid hardening under high-speed impact, effectively absorbing energy and dispersing impact forces, while maintaining softness and lightweight characteristics under static conditions. This article systematically analyzes the molecular structure and properties of polyborosiloxane, as well as the principle of bulletproof and explosion-proof effects, and focuses on exploring its application status in the fields of bulletproof vests, bulletproof armor, explosion-proof glass, explosion-proof clothing, explosion-proof containers, and shields. By integrating the latest research advances, this study also summarizes existing technical bottlenecks and future development directions, providing insights for the design of high-performance protective materials. Reference | Related Articles | Metrics

Select

Tensile properties and damage evolution of a 2.5D braided quartz/phenolic composite at elevated temperatures JIAO Lei, RUAN Hao, SU Ruiyi, GE Zhifu, LI Mei, ZHANG Chengyu COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (8): 54-65.   DOI: 10.19936/j.cnki.2096-8000.20250828.007 Abstract （166）      PDF （12249KB）（359）       Knowledge map    Save Quartz/phenolic composite is a kind of thermal protection material widely used in aerospace vehicles. The study of its high temperature tensile properties and damage mechanism is of great value to the application of resin-based thermal protection materials. To this end, this paper tested the tensile properties of a 2.5D braided quartz/phenolic composite (2.5D-SiO 2f/phenolic), and the test temperature range was from room temperature to 800 ℃. Acoustic emission technology is used to dynamically monitor the damage evolution of tensile specimens at room temperature, combined with scanning electron microscope to observe the fracture morphology, and analyze its tensile damage mechanism. The results show that the tensile strength at room temperature can reach 275 MPa and the modulus can reach 17 GPa. In the range of room temperature to 800 ℃, the tensile properties of 2.5D-SiO 2f/phenolic gradually decrease with increasing temperature. It is revealed that during the 2.5D-SiO 2f/phenolic stretching process, there are mainly damage signals in the frequency range of 70~100 kHz, 220~270 kHz, 300~330 kHz, corresponding to the three damage modes of matrix cracking, fiber and matrix debonding, and fiber fracture. In this way, the evolution process of tensile damage is analyzed. Reference | Related Articles | Metrics

Select

Study on the properties of PTFE substrate reinforced by quartz fiber BAI Mengzhao, WENG Xiaoyu, CUI Mengting, LONG Jin COMPOSITES SCIENCE AND ENGINEERING    2026, 0 (2): 72-77.   DOI: 10.19936/j.cnki.2096-8000.20260228.010 Abstract （166）      PDF （6929KB）（361）       Knowledge map    Save In this paper, quartz fiber paper was prepared by wet forming method with different ratio of micro and nano quartz fibers. After dipping in PTFE emulsion and pre-burning to remove small organic molecules, the composite substrate was prepared by hot pressing and sintering, and the dielectric, mechanical and thermal properties of the substrate were characterized and analyzed. The results show that the density and water absorption decrease with the increase of the content of quartz fiber while the proportion of total fiber remains unchanged. In terms of dielectric properties, the dielectric constant decreases with the increase of quartz fiber content. When the quartz fiber proportion reaches 80%, the dielectric constant is at its lowest to 2.21, and the dielectric loss presents a nonlinear relationship, and the lowest is 0.000 96 when the proportion of quartz fiber is 40%. In terms of thermal conductivity, the increase in quartz fiber content results in an enhancement of the composite’s thermal conductivity, and reaches a maximum of 0.232 W/(m·K) when the proportion of quartz fiber is 80%. In terms of mechanical properties, the tensile strength and elastic modulus decreased with the increase of quartz fiber content, and decreased to 17.85 MPa and 1538.76 MPa when the proportion of quartz fiber was 80%. Reference | Related Articles | Metrics

Select

Manufacturing techniques for composites with complex inner-ribbed grid closed-cavity structures ZHANG Xuan, WANG Hao, ZHENG Liangang, ZHAI Dongkun, WANG Zixun, CHEN Yi COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (12): 96-102.   DOI: 10.19936/j.cnki.2096-8000.20251228.013 Abstract （165）      PDF （9404KB）（111）       Knowledge map    Save The satellite mounting plate of carbon fiber composite has a special internal rib grid structure. In order to solve the problem of difficulty in forming large-size closed-cavity structural parts using existing composite material forming process methods, this work designs a composite water-soluble core mold with flexible expansion skin-core characteristics, and proposes a process method for co-curing composite material internal rib grid closed-cavity structure based on the composite core mold, and verifies the rationality of the process strategy through typical part process tests. The preparation of the satellite mounting plate product was finally realized by using a laminate autoclave and thermal expansion process in conjunction with co-curing forming tooling. Compared with the traditional partition pre-pressing-secondary bonding forming process, the co-curing forming scheme proposed in this paper greatly reduces the manufacturing cost and process complexity, without fastener connection and secondary bonding, and the structural continuity, overall mechanical properties and inner cavity cleanliness of the satellite mounting plate are significantly improved. The product has passed the bending, flat pressing, vibration and thermal environment assessments. Reference | Related Articles | Metrics

Select

Preparation and study on high-velocity impact resistance of carbon/aramid fiber hybrid reinforced epoxy composite materials ZUO Xiaobiao, ZHAO Zehua, YANG Zhiyong, SUN Jianbo, ZHU Shipeng, YI Kai, ZHOU Jincen, FAN Hu, ZHANG Chao COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (12): 56-62.   DOI: 10.19936/j.cnki.2096-8000.20251228.008 Abstract （164）      PDF （8470KB）（134）       Knowledge map    Save Carbon fiber composite materials have poor resistance to high-velocity impact, which to some extent hinders further expansion of application, so the hybrid design of carbon fiber and other fibers in composite materials is an effective measure to improve the comprehensive performance of composite materials. The investigation of static and dynamic mechanical properties exhibits C/EP possesses better static mechanical properties, while F12/EP has better dynamic mechanical properties. Based on automated fiber placement, structure design and the control of mass ratio for aramid fiber/carbon fiber, a novel carbon/aramid fiber hybrid composite combined with excellent mechanical property and high-velocity impact resistance has been prepared. The preferred mass percentage of aramid fiber for the hybrid composites is 35%~55%. The morphology analysis and simulation analysis for the sample after impact, the damage area of front plate and back plate for C/EP is obviously smaller than that for F12/EP, which indicates that F12/EP possesses better ability for impact energy dissipation, resulting in a higher criticalpenetration velocity. Reference | Related Articles | Metrics

Select

Research progress on fiber reinforced polydicyclopentadiene composites XIAO Jian, LI Pengfei, FU Hongwei, JIA Zhiyuan, CHEN Yong COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (11): 137-144.   DOI: 10.19936/j.cnki.2096-8000.20251128.017 Abstract （163）      PDF （5049KB）（425）       Knowledge map    Save Polydicyclopentadiene (PDCPD) is a kind of thermosetting polymeric material with excellent mechanical properties, low density and easy processing, which can replace some steel plate, castings and glass steel parts for agricultural vehicles, engineering vehicles, heavy trucks and other applications. Fiber reinforced PDCPD composites can show stronger mechanical properties and may extend to wider application including but not limited to various vehicle parts, rail transit, wind power, photovoltaic parts, hydrogen storage, etc. However, the polarity of PDCPD itself is low, and the interfacial bonding between commercial fabrics and PDCPD is poor, which limits the application of fiber reinforced PDCPD composites. The research progress of fiber-reinforced PDCPD materials in recent years was reviewed. The approaches to improve the interfacial bonding property of the carbon and glass fiber reinforced PDCPD materials were discussed. And future modifications of the fiber-reinforced PDCPD composites were prospected. Reference | Related Articles | Metrics

Select

Optimized design on bonding and microwave absorption properties of MWCNT—NH 2 reinforced epoxy adhesive ZHENG Kunpeng, WANG Juntao, LIU Zetong, HAO Jingye, SHI Jianheng, CHEN Dingding COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (10): 1-5.   DOI: 10.19936/j.cnki.2096-8000.20251028.001 Abstract （162）      PDF （6269KB）（312）       Knowledge map    Save The design and preparation of functionalized composite structures often require adhesives with both mechanical properties and excellent electrical performance. In this study, multi-walled carbon nanotubes (MWCNT) and surface-aminated multi-walled carbon nanotubes (MWCNT—NH 2) were used as reinforcing fillers to investigate the effects of their contents and surface amination on the bonding and microwave absorption properties of epoxy adhesives. Results show that MWCNT significantly regulate the adhesive properties: with increasing content, the bonding strength exhibits a trend of first increasing and then decreasing, while the microwave absorption performance gradually enhances. Surface amination modification improves the interfacial compatibility between MWCNT—NH 2 and the epoxy matrix, thereby significantly optimizing the bonding performance. However, the introduction of surface functional groups alters the electronic structure of MWCNT—NH 2 and disrupts the conductive network, resulting in a substantial decline in the microwave absorption performance of the MWCNT—NH 2-modified adhesive compared to that of the unaminated MWCNT system. Reference | Related Articles | Metrics

Select

Application prospects of thermoplastic composites in automotive lightweighting YAO Lichao, WANG Shuxia, LI Yiquan, MAO Yasai COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (12): 138-144.   DOI: 10.19936/j.cnki.2096-8000.20251228.018 Abstract （161）      PDF （4525KB）（140）       Knowledge map    Save In response to the growing demand for automotive lightweighting, thermoplastic composites have demonstrated broad application potential in the automotive industry due to their excellent mechanical properties, low-density characteristics, and favorable processing adaptability. This article reviews the practical applications of thermoplastic composites in automotive structural components, interior trim parts, exterior panels, and load-bearing components. Meanwhile, to address current challenges such as high costs, complex forming processes, and immature recycling technologies, feasible engineering solutions are proposed. With advancements in polymer material modification technologies and intelligent manufacturing, thermoplastic composites will play an increasingly important role in automotive lightweighting, driving the transformation and upgrading of the automotive industry toward green and low-carbon development. Reference | Related Articles | Metrics

Select

Preparation of in-situ polymerized cross-linked porous polyimide composite materials research on electrochemical performance LUO Farong, ZHANG Zhiming, CHEN Jian COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (11): 40-47.   DOI: 10.19936/j.cnki.2096-8000.20251128.005 Abstract （160）      PDF （3460KB）（365）       Knowledge map    Save In this paper, cross-linked porous polyimide composites with different MWCNTs contents were prepared by in-situ polymerization using multi-walled carbon nanotubes (MWCNTs) as additive (INCPI@MWCNTs). The group, pore structure and adsorption properties of the cross-linked porous polyimide composites (INCPI@MWCNTs) were studied. The feasibility of using the cross-linked porous polyimide composites as positive electrode materials for lithium-sulfur batteries was discussed. The results show that in-situ polymerization has no effect on the cross-linking reaction and the structure of porous polyimide. Under the condition of nitrogen isothermal adsorption test of different specifications INCPI@MWCNTs, the nitrogen adsorption capacity increased with the increase of relative pressure due to the presence of large pore structure in the material. The BET specific surface area and micropore specific surface area of INCPI@MWCNTs gradually decreased with the increase of the addition of MWCNTs. The volume of micropores increased with the addition of MWCNTs. Using INCPI@MWCNTs as the positive carrier, S/PPI@MWCNTs positive carrier composite material was obtained by diffusion loading with sulfur, and lithium-sulfur battery was assembled for electrochemical performance test. Under the condition of 0.2 C current density, two discharge platforms and one charging platform appear in the charge and discharge curves of three different S/INCPI@MWCNTs positive terminals. The specific initial discharge capacity of the battery corresponding to S/INCPI@MWCNTs-2 is 1 326 mAh·g -1, and the retention capacity is 855 mAh·g -1 after 100 cycles, capacity retention rate is 65%. Under the condition that the current density is 1 C, the specific capacity of the first discharge of S/INCPI@MWCNTs-2 battery is 1 035 mAh·g -1, and after 400 cycles, the retention capacity is 662 mAh·g -1, and the capacity retention rate is 65%. S/INCPI@MWCNTs-2 as the cathode material can make the battery have better discharge specific capacity, rate performance and cycle stability. Reference | Related Articles | Metrics

Select

Study on the influence of PVDF electrospun nanofiber membranes with different areal densities on the interlaminar fracture toughness of CF/EP composite laminates PENG Yan, WEI Liaoxian, ZENG Tangyu, MA Chuanguo COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (8): 15-23.   DOI: 10.19936/j.cnki.2096-8000.20250828.003 Abstract （159）      PDF （9973KB）（400）       Knowledge map    Save This study examines the reinforcing impact of polyvinylidene fluoride (PVDF) nanofibrous membranes when used as an additive material on the interlaminar fracture toughness of carbon fiber/epoxy (CF/EP) composite laminates with different areal densities. Here, PVDF electrospun nanofibrous membranes with three different areal densities (9 g/m 2, 15 g/m 2, 28 g/m 2) were prepared and inserted into the interlaminar layers of the laminates for experimental analysis. The results show that the PVDF nanofibrous membrane with a 15 g/m 2 areal density provided the most significant enhancement of the interlaminar fracture toughness of the laminate, with 67% and 13% enhancement of the mode Ⅰ and mode Ⅱ fracture toughness, respectively, with respect to that of the laminate without the introduction of the PVDF nanofibrous membrane. SEM analysis reveals that the toughening mechanism of PVDF nanofibrous membranes mainly included the processes of fibre bridging, pull-out and fracture. Furthermore,based on the numerical simulation of mode Ⅰ and mode Ⅱ interlaminar fracture behaviours using the finite element simulation method with cohesion model, it is found that the incorporation of PVDF nanofibrous membranes did not significantly change the interface strength of the interlaminar region, but effectively prevented the propagation of the interlaminar cracks through the action of the fibrous skeleton. The numerical simulation results were in good agreement with the experimental results, which verifies the feasibility of cohesion model in simulating the interlaminar cracks in PVDF nanofibrous membranes. Reference | Related Articles | Metrics

Select

The application prospects of MOFs containing functional groups in liquid-phase adsorption and the application prospects of the composite of MOFs containing functional groups and smart substrates SU Yuxing, LAN Xin, ZHANG Dawei COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (10): 13-21.   DOI: 10.19936/j.cnki.2096-8000.20251028.003 Abstract （159）      PDF （1655KB）（272）       Knowledge map    Save In recent years, the adsorption of impurities in liquid-phase systems has received increasing attention due to prominent environmental and other issues. Since the adsorbents in liquid-phase adsorption, whether ions or molecules, all have their own characteristics, targeted adsorbents are required for the adsorption of different types of adsorbents. Metal-organic framework materials (MOFs) are widely used due to their good specific surface area and abundant reaction sites. Further, MOFs with functional groups can be more specifically customized for adsorbents with their own characteristics. That is, such MOFs containing functional groups can often become targeted adsorbents, enabling high efficiency and low cost. This article focuses on MOFs containing functional groups, comprehensively summarizes the approaches for introducing functional groups, as well as the ways in which different types of groups achieve targeted adsorption of adsorbates. Finally, the selection strategies of MOFs and adsorbents containing functional groups were proposed. This strategy enables the structural analysis of specific adsorbates, thereby guiding the selection of MOFs with appropriate functional groups for adsorption. However, the inherent powder form of MOFs limits their applications, compositing them with suitable smart substrates can overcome this limitation. In the future, MOFs/smart substrate composites have significant development potential. Reference | Related Articles | Metrics

Select

Influence and optimization of process parameters on bearing strength of composite bolted connection structure SUN Xinyang, WU Tao, ZHU Zhaoxuan, HUANG Yan COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (11): 20-29.   DOI: 10.19936/j.cnki.2096-8000.20251128.003 Abstract （159）      PDF （12397KB）（276）       Knowledge map    Save In order to analyze the influence of the parameters of composite connectors, optimize the ratio between conventional parameters, and improve the structural economy and practicability, the influence of tensile str-ength on the significant connection parameters in the three manufacturing and assembly stages of plate thickness, end-diameter ratio and preload was studied. Combined with the UMAT subroutine, the finite element model of CFRP bolted joints was established, and the static tensile failure and SEM damage observation tests were carried out to verify the finite element model. On this basis, based on the Box-Behnken design, combined with the response regression equation, 3D response surface and contour map, the joint response model of bearing strength and influencing factors was established, and the three parameters were analyzed from the aspects of single factor and multi-factor interaction, and the determined coefficient R 2 of the joint response model was 0.984 7, Adj R 2 is 0.957 1, Pred R 2 value is 0.794 4, the model fitting effect and prediction ability are better; the analysis results show that plate thickness is the most significant single factor affecting the bearing strength among the three parameters, and the interaction between plate thickness and end-diameter ratio has the most significant effect, and the model gives an optimization of plate thickness, end-diameter ratio and preload, and the error between the predicted strength and the finite element result is 0.37%, indicating that the established joint response model has a good strength prediction ability. Reference | Related Articles | Metrics