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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 （304）      PDF （4592KB）（618）       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

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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 （284）      PDF （942KB）（368）       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

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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 （236）      PDF （7462KB）（275）       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

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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 （210）      PDF （7885KB）（465）       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

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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 （208）      PDF （8324KB）（529）       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

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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 （197）      PDF （4866KB）（241）       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

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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 （190）      PDF （7645KB）（290）       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

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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 （189）      PDF （9566KB）（206）       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

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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 （181）      PDF （12156KB）（389）       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

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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 （180）      PDF （971KB）（401）       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

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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 （177）      PDF （6159KB）（436）       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

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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 （177）      PDF （10462KB）（107）       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

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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 （174）      PDF （41659KB）（238）       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

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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）（412）       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

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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 （171）      PDF （22858KB）（339）       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

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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 （171）      PDF （915KB）（296）       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

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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 （169）      PDF （4525KB）（150）       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

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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 （169）      PDF （6929KB）（370）       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

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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 （167）      PDF （5049KB）（427）       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

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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 （167）      PDF （8470KB）（137）       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

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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 （167）      PDF （12397KB）（279）       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

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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 （166）      PDF （1655KB）（274）       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

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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 （166）      PDF （9404KB）（113）       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

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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 （164）      PDF （6269KB）（325）       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

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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 （163）      PDF （3460KB）（368）       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

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Study on the influencing factors of Z-shaped partition frame roll forming defects in aviation composite fuselage SUN Daoping, YUE Guangquan, LIU Weiping, LI Zhefu, SONG Qinghua, LU Xin COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (10): 123-132.   DOI: 10.19936/j.cnki.2096-8000.20251028.018 Abstract （162）      PDF （15011KB）（232）       Knowledge map    Save In this paper, Z-shaped frame parts with curvature and complex structure were prepared by the automatic roll forming technology of composite materials. However, during the roll forming process, the prepreg is subjected to complex thermal/mechanical effects, resulting in defects such as in-plane buckling or out of plane wrinkles in the frame. In this paper, different process parameters and structure parameters were analyzed theoretically and studied experimentally. The effects of temperature, speed and lay-up structure on the formation of defects were discussed through defect observation and characterization. The temperature affects the state of the resin in the prepreg, which affects the change of the slip mechanism and leads to the defects. The velocity determines the sufficiency of structural response of prepreg. The change of layering changes the interlayer shear, interlayer slip and friction, and then affects the generation of defects such as wrinkles. The results show that the best roller preforming effect is achieved at the temperature of 50 ℃ and the speed of 50 mm/min. The research results in this paper can provide theoretical guidance for parameter optimization of roller preforming process. Reference | Related Articles | Metrics

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Research on lightweight design of automotive hybrid B-pillar assembly XU Liyou, GUO Yongzheng, ZHANG Shuai, LU Dongzhen COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (11): 95-102.   DOI: 10.19936/j.cnki.2096-8000.20251128.012 Abstract （160）      PDF （10224KB）（337）       Knowledge map    Save To enhance the lightweight quality and crash safety of automobile B-pillar assembly, this paper puts forth a hybrid material B-pillar assembly design scheme comprising a high-strength steel outer plate, a carbon fiber composite inner plate, and a glued connection between the two. A finite element analysis model must be established for a dynamic impact drop hammer collision test of an automobile B-pillar. The validity of the model must then be verified from the hourglass energy test. A finite element model of a carbon fiber composite B-pillar reinforcing plate must be established, along with the layup design of the carbon fiber composite B-pillar reinforcing plate. Finally, the optimal carbon fiber composite layup sequence must be obtained. The carbon fiber composite B-pillar reinforcement plate was affixed to the high-strength steel outer plate via an adhesive bonding process to construct the B-pillar assembly specimen of the hybrid material. The accuracy and validity of the simulation model were further verified by dynamic drop weight tests and impact failure electron microscopy tests. The results demonstrated that the carbon fiber composite material B-pillar reinforcement panel reduced weight by 0.623 kg, and the hybrid material B-pillar assembly reduced the maximum displacement during the collision process by 12.8% in the falling weight impact test. The discrepancy between the simulation optimization and the actual test results did not exceed 5%. This substantiates the accuracy and reliability of this solution, and the lightweight effect and collision safety were markedly enhanced. Reference | Related Articles | Metrics

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Tensile mechanical test and numerical simulation of pin-anchored CFRP laminated strap cable LEI Jiayan, ZHAO Daohua, KONG Qinghui, ZHANG Longbin, ZHANG Qirui COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (11): 103-109.   DOI: 10.19936/j.cnki.2096-8000.20251128.013 Abstract （160）      PDF （9294KB）（433）       Knowledge map    Save The pin-anchored carbon fiber reinforced polymers (CFRP) cable member has promising application in structure engineering for its simple structural construction. However, the effective anchorage of cable end would interrupt its full tensile capacity for premature failure in anchorage zone. In this work, tensile mechanical test was conducted with seven pin-anchored CFRP laminated loop straps to investigate the failure mechanism, ultimate tensile capacity and nonuniform stress in pin-anchored zone with the help of the digital image correlation (DIC) technology. The test results show that the fixture is crucial to the development of the tensile properties and failure mode of the strap cables. One no-fixture specimen was subjected to laminar tear; and the rest six strap cables showed nonlinear development in the load-displacement curves during tensile loading process, in which the microdamage of matrix and the adhesion failure of matrix and fiber interface accumulated continuously. Analysis explained the mechanism that the wedge angle θ and transverse binding force provided by the fixture were crucial in two structural failure modes of the cables. Finally, finite element analysis was carried out with quasi-static tensile simulation technique in ABAQUS to monitor the non-uniform stress in lamination layers up to the premature failure in anchor zone. Reference | Related Articles | Metrics

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Fabrication and high-temperature properties of silicon nitride fiber-reinforced boron nitride matrix composite PENG Zhe, LI Jiaojiao, YUAN Zhiqing, LI Song COMPOSITES SCIENCE AND ENGINEERING    2026, 0 (1): 69-73.   DOI: 10.19936/j.cnki.2096-8000.20260128.010 Abstract （160）      PDF （6687KB）（48）       Knowledge map    Save Aiming at the application requirements of hypersonic vehicles for new high-temperature transparent composite materials, Si 3N 4f/BN composite was prepared by using PIP process with three-dimensional woven fabric of Si 3N 4f fiber satin weave as reinforcement and borazine as ceramic precursor. The structure and properties of Si 3N 4f/BN composite were characterized by SEM, XRD, high temperature bending and ablation. The results show that Si 3N 4f/BN composite appears uniform and dense texture and the density reaches 1.82 g/cm 3. They have excellent high temperature mechanical properties with a flexural strength of 76.9 MPa at 1 400 ℃ and a strength retention rate exceeding 70%. At 1 400 ℃, the composite still maintains an amorph structure. Si 3N 4f/BN composite also exhibits excellent ablation resistance with a linear ablation rate of 0.026 mm/s for the test that adopted oxygen-acetylene ablation test in accordance with GJB 323A—1996. The surface of ablative area and the area along the direction of heat flow are emerged the ablation center area, the ablation transition area, and the non-ablated matrix area. In the ablation center, the fibers are consumed, leaving only a porous BN matrix and a small amount of oxides. In the ablation transition area, the surface of the fiber is wrapped by molten oxides. The non-ablated area is still a dense Si 3N 4f/BN matrix. Reference | Related Articles | Metrics

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SiC f/SiC composite materials:SiC fibers, preparation techniques and application progress in aero-engines JIAO Chunrong, JIAO Jian COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (12): 131-137.   DOI: 10.19936/j.cnki.2096-8000.20251228.017 Abstract （158）      PDF （2466KB）（236）       Knowledge map    Save SiC f/SiC composite materials exhibit characteristics such as lightweight, low density, excellent high-temperature stability, superior mechanical properties, outstanding chemical stability, and high wear resistance, making them ideal for hot-section components in aero-engines. This paper primarily introduces the current development status of SiC fibers, the fabrication processes and properties of SiC f/SiC composites, and the application progress of SiC f/SiC composites in aero-engines. It further analyzes the challenges currently faced in the development of SiC f/SiC composites and proposes key priorities for their future advancement. Reference | Related Articles | Metrics

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Study on the influence of interface structure on the propagation of impact stress waves in composite materials TANG Bo COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (10): 77-82.   DOI: 10.19936/j.cnki.2096-8000.20251028.012 Abstract （157）      PDF （5853KB）（237）       Knowledge map    Save Composite materials are widely used in the field of ballistic and explosion prevention due to their excellent overall toughness and impact resistance, and the internal stress wave propagation of composite materials is very important to their impact resistance. The finite element software is used to study the effect of different interface structures and structural parameters on the stress wave propagation of the impact material composed of two layers of composite materials under the impact load generated by explosion. The results show that the impact load generated by explosion continues to propagate in the form of stress wave when reaching the composite material. When arriving at the interface, the stress wave will be reflected and transmitted due to different wave impedances of materials on both sides. Compared with the flat interface, the triangle interface has stronger attenuation effect on the stress wave. With the decrease of the angle of triangular interface, the peak value of stress wave reaching the second layer of composite decreases gradually. Under the same angle, the peak value of stress wave decreases first and then increases with the increase of interface thickness. This research is important in the field of ballistic and explosion protection. Reference | Related Articles | Metrics

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Research progress on influence factors of the mechanical properties of fiber-reinforced composite bolted joints ZHANG Yongliang, ZHANG Hui, YUAN Yi, WANG Xiaolong, YANG Xudong COMPOSITES SCIENCE AND ENGINEERING    2026, 0 (2): 135-144.   DOI: 10.19936/j.cnki.2096-8000.20260228.019 Abstract （156）      PDF （2427KB）（381）       Knowledge map    Save Bolted connections have been widely used in the field of aerospace due to their efficient and reliable connection performance. However, some issues, including delamination defects, perpendicularity errors, inevitably occur during the processing of holes in fiber-reinforced composite plates. Besides, the systematic and manual errors can also lead to the inappropriate preload or the existence of assembly gaps during the assembly process. Such will significantly affect the mechanical properties of bolted joint structure. In this work, we summarized four general influential factors on the properties of fiber-reinforced resin matrix composite bolted joints in machining and assembly processes: delamination defect, perpendicularity error, preload force and assembly gap. Meanwhile, their effects on mechanical properties and the corresponding reactional mechanisms have been systemically discussed. Moreover, we also proposed the future tendency of the factors affecting the mechanical properties of fiber-reinforced composite bolted joints. Reference | Related Articles | Metrics

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Synthesis and application of silicone modified thermosetting phenolic resin ZHAO Congcong, FENG Jiajia, AN Kunhua, LI Xuexue, LIU Cong, ZHANG Linqi COMPOSITES SCIENCE AND ENGINEERING    2026, 0 (2): 58-64.   DOI: 10.19936/j.cnki.2096-8000.20260228.008 Abstract （155）      PDF （6191KB）（358）       Knowledge map    Save In this paper, 3-isocyanatopropyl triethoxysilane (KH-907) was employed as a modifier, while phenol and formaldehyde served as monomer raw materials. The intermediate of N-(3-triethoxysilylpropyl) phenyl carbamate was synthesized by controlling the conditions of the addition reaction. Subsequently, this intermediate reacted with formaldehyde under the catalysis of an alkaline catalyst, successfully synthesizing the organosilicon-modified phenolic resin liquid (IPTES-PF). The chemical structure and curing behavior of the modified phenol-formaldehyde (PF) were investigated via fourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC). The effects of the addition amount of organosilicon and the material ratio on the mechanical properties and thermal stability of the modified PF were studied through mechanical property tests and thermogravimetric (TG) analysis. The results indicated that the introduction of KH-907 enhanced the heat resistance of PF. Moreover, as the content of the modifier KH-907 and the molar ratio of formaldehyde increased, the mechanical properties of the organosilicon-modified PF initially rose and then declined. When the content of KH-907 was 15% and the molar ratio of phenol to formaldehyde was 1∶1.8, the mechanical properties of the organosilicon-modified PF resin liquid were optimal, with a tensile shear strength of 7.06 MPa and a peel strength of 328 N/5 cm. The impact strength of the silicone modified PF composite and the grinding ratio of the consolidated abrasive tool reach the maximum when the content of KH-907 is 15%, which are 2.87 kJ/m 2 and 20.913, respectively. Reference | Related Articles | Metrics

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Simulation analysis of stitched foam sandwich composite by VARTM molding ZHANG Lianhe, QIN Cheng, CHENG Yanan, REN Hao, LI Yongfeng, ZHANG Hui COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (11): 70-78.   DOI: 10.19936/j.cnki.2096-8000.20251128.009 Abstract （155）      PDF （17597KB）（395）       Knowledge map    Save In order to investigate the injection process of stitched foam sandwich composites, the permeability of foam sandwich fiber layer and core layer holes were measured based on Darcy’s law, and the equivalent model of foam sandwich was established. Composite materials were prepared by vacuum-assisted resin transfer molding (VARTM) process. The effects of stitch density and injection method on the permeability and filling process of stitched foam sandwich composites were systematically investigated. The results show that compared to the unstitched fabric, when stitched at a density of 8 mm×8 mm, the permeability of the fiber layer stitched fabric along the stitch direction increase by a maximum of 104.9%. When stitched at a density of 4 mm×4 mm, the permeability along the carbon fiber axis reaches its maximum value of 9.6×10 -11m 2, which increases by 546.0% compared to the unstitched fabric. This indicates that the introduction of stitch can effectively improve the permeability of the fabric. The efficiency of long edge injection is the highest, with a simulated injection time and actual error of 13.4%. With the increase of stitch density, the injection time of stitched foam sandwich composites increases firstly and then decreases, which may be the reason that the injection direction is in the same direction as the carbon fiber axis. Reference | Related Articles | Metrics

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Machine learning-based design and optimization method of critical parts of wind turbine blades LIU Junbang, LIU Qing, LIN Qiyang, ZHANG Wenhua, HUANG Xuanqing COMPOSITES SCIENCE AND ENGINEERING    2026, 0 (1): 124-132.   DOI: 10.19936/j.cnki.2096-8000.20260128.017 Abstract （152）      PDF （10066KB）（88）       Knowledge map    Save An analysis of the structural performance of the spar cap of wind turbine blades was conducted, and a reverse structural optimization method for key components of wind turbine blades based on a machine learning model was developed, combining the use of FOCUS and the Python programming language. Taking a 1.5 MW wind turbine blade design as an example, the finite element analysis (FEA) model of the blade was established. The thickness of the spar cap was selected as the design variable, and the peak strain of the spar cap served as the optimization objective. A machine learning model was developed to reflect the underlying mapping relationship between the spar cap layup parameters, strain, and mass. Based on this machine learning model, a self-learning cyclic optimization method was developed. This method enables the rapid iteration of key parts of the same blade type under different wind fields and load conditions. The optimized spar cap improves performance by about 11.44% while maintaining the same cost. Due to its high portability, this method is expected to become an effective tool for the design and optimization of key parts of wind turbine blades. Reference | Related Articles | Metrics

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Study on compression failure mechanism and energy absorption characteristics of composite wound tube SU Hailiang, WEI Tengteng, HUANG Weilong, WEI Zhenxiao, ZHOU Mengfan COMPOSITES SCIENCE AND ENGINEERING    2026, 0 (2): 28-33.   DOI: 10.19936/j.cnki.2096-8000.20260228.004 Abstract （151）      PDF （10686KB）（404）       Knowledge map    Save Mechanical tests and simulation methods were utilized to study the failure behavior and attributes of [±45] 3S wrapped composite round pipes under various compression circumstances. Quasi-static axial and radial compression failure tests were performed on the composite wound cylindrical pipes, followed by an investigation of the wound round pipe’s energy absorption characteristics. LS-DYNA was used to create a finite element model of the Hashin and Chang-Chang failure criterion for simulation, and the failure reaction and energy absorption damage process of the circular tube were investigated. The efficiency of the established simulation model was thoroughly validated using comparative tests and numerical analysis. The results demonstrate that the wound tube mostly absorbs crushing energy via matrix fracture and fiber buckling. The Chang-Chang failure criterion simulates deformation more accurately, which is consistent with test results in which the initial peak value, total energy absorption, and specific energy absorption of axial and radial compression are all less than 10%. Reference | Related Articles | Metrics

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Application of transfer learning in the prediction of elastoplastic response of short fiber reinforced polymers XING Wenqi, ZHU Shuiwen, WU Shunxin COMPOSITES SCIENCE AND ENGINEERING    2026, 0 (2): 10-19.   DOI: 10.19936/j.cnki.2096-8000.20260228.002 Abstract （149）      PDF （12490KB）（373）       Knowledge map    Save With the wide application of composite materials in aerospace and automotive fields, it has become more and more important to accurately predict their mechanical properties. In this study, a transfer learning-based stress-strain curve prediction method for short fiber reinforced polymers was proposed. Firstly, the database was constructed by DIGIMAT and the Latin hypercube sampling technique was used to select samples to improve the efficiency of model training. Then, using artificial neural network (ANN) as a surrogate model, and through the transfer learning method, the stress-strain prediction model of the new material can be quickly obtained. The results show that the transfer learning model can effectively capture the key features of the stress-strain behavior of materials, especially in predicting the fifth-order polynomial coefficients. The effects of fiber volume fraction and aspect ratio on the mechanical properties of materials were further analyzed, and it was found that the fibers with larger length-diameter ratios could transmit stress more effectively. This study provides an effective tool for the performance prediction of short fiber reinforced polymers, especially when data acquisition is difficult or the cost is high, the potential and application prospects of transfer learning in the performance prediction of composite materials are demonstrated. Reference | Related Articles | Metrics

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Delamination damage propagation monitoring of composites at different interfaces based on Lamb waves WU-Li Qiya, GENG Yanan COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (12): 72-78.   DOI: 10.19936/j.cnki.2096-8000.20251228.010 Abstract （148）      PDF （7289KB）（100）       Knowledge map    Save Delamination damage is one of the common damage in composite materials, and it will gradually expand with the extension of working time, which will seriously weaken the strength and stability of composite materials. At the same time, the delamination damage at different interfaces will also cause various mechanical changes to different degrees. Therefore, it is of great significance for the overall safety of the structure to effectively identify, locate and expand monitoring it. In this paper, a Lamb wave-based ToF delamination damage monitoring method is proposed. By comparing and analyzing the Lamb wave ToF differences between the upper and lower surfaces of composite laminates, the damage interface of composite laminates with an initial delamination damage is located, and the delamination damage expansion at different interfaces is continuously monitored online. Firstly, the principle of Lamb wave monitoring delamination damage is studied. Secondly, the relationship between the depth and length of the delamination damage interface and the propagation speed of Lamb waves in the structure was established, and the theoretical basis for the location and extension monitoring of the delamination damage interface was obtained. Finally, the effectiveness of the proposed method was verified by finite element simulation. The simulation results show that the shallower the delamination damage interface is from the laminate surface, the more significant the Lamb wave signal delay, and the greater the difference in signal time between the upper and lower surfaces, moreover, the signal delay is linearly related to the increase of delamination damage length. Reference | Related Articles | Metrics

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Study on the influence of graphene on the creep behavior of ultra-high molecular weight polyethylene fibers JIANG Bo, WANG Zhengwei, CHENG Feng, ZHAO Lili, WANG Qingna, CAO Yiru, LI Jie, SU Jiakai COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (10): 53-59.   DOI: 10.19936/j.cnki.2096-8000.20251028.008 Abstract （146）      PDF （3306KB）（230）       Knowledge map    Save UHMWPE fibers with graphene content ranging from 0% to 15% were prepared via a twin-screw extruder. The creep strain and creep rate of the fibers were measured using constant-load creep tests, and the creep behavior was predicted using the Burgers model. The results showed that as the graphene content increased from 0% to 8%, the fiber’s creep resistance improved. Within the initial 7.5 s of loading, the creep strain ε 7.5 decreased from 2.23% to 1.41%, and the creep rate d ε 7.5 dropped from 0.28 s -1 to 0.19 s -1. During the stable loading stage, the creep strain ε 12 000 fell from 7.95% to 3.86%, and the creep rate d ε 12 000 decreased from 3.67×10 -4 s -1 to 1.83×10 -4 s -1. However, when the graphene content exceeded 8%, fiber agglomeration reduced the creep resistance. Agglomeration also inhibited the formation of extended-chain crystals of polyethylene macromolecules, causing the peak temperatures of the fiber’s first and second endothermic peaks to decline. The Burgers model could predict the creep behavior of fibers with different graphene contents well, with a mean square error between the predicted and experimental results below 0.06. As the graphene content increased, the model’s elastic modulus ( E M, E K) and viscosity ( η M, η K) parameters rose significantly, confirming graphene’s inhibition on polymer chain slippage. As the graphene content increased, the fiber’s elastic modulus rose from 130.3 GPa for pure fibers to 210.3 GPa for fibers with 15% graphene content. When the graphene content exceeded 8%, the experimental values of fiber elastic modulus were lower than the theoretical predictions of the Mori-Tanaka model. Reference | Related Articles | Metrics

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The investigation of composite material envelope curing deformation affected by layout structure and cementing GAO Xiang, HU Jiandong, XIE Xiaolin, LI Wenbo, WANG Ziqiang, AN Lin COMPOSITES SCIENCE AND ENGINEERING    2025, 0 (10): 105-113.   DOI: 10.19936/j.cnki.2096-8000.20251028.016 Abstract （146）      PDF （15407KB）（257）       Knowledge map    Save The design of stringer arrangement structure not only affects the mechanical properties of aircraft envelope, but also affects the curing deformation during forming. Therefore, it is very important to study the influence of stringer arrangement structure and cementing effect on aircraft envelope forming. In this paper, curing degree,glass transition temperature, internal stress, and strain changing over time have been analyzed based on simulation, more over comparing the influence of hat section stringer layout structure and cementing effect on residual internal stress and curing deformation of composite skin and verified by experiment. The results indicate that, the stress increases rapidly as composite material envelope cured. It will exceed 49.1 MPa after demoding, and further extend to 51.7 MPa while the cementing effect is taken into account. The curing deformation along the length and width change slightly, range from 0.19~0.31 mm, primarily influenced by cure shrinkage. However, the warping deformation of the envelope is influenced by the combined effect of mold bonding and stringer cementing, and the stringer cementing having a more significant impact. As the cementing area decreases, the warping deformation decreases from 2.50 mm to 1.19 mm, and the deformation distribution becomes more uniform. By contrast, the middle stringer has a greater impact on warping deformation and more pronounced stress concentration than outer stringer. Reference | Related Articles | Metrics