Composites Part A: Applied Science and Manufacturing最新文献_第3页

Enhance interfacial bonding of glass-fiber-reinforced PPS resistance welded joints: mechanisms of surface modification on Ti mesh heating element and ultrasonic assistance 增强玻璃纤维增强PPS电阻焊接接头界面结合：钛网加热元件表面改性及超声辅助机理

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-04-01 Epub Date: 2026-01-16 DOI: 10.1016/j.compositesa.2026.109587

Zhiwu Xu , You Wu , Zhongwei Ma , Junjie Gao , Jiuchun Yan , Zhengwei Li

Weak interfacial bonding between the polymer matrix and the metallic heating element (HE) limits further improvement in the lap shear strength (LSS) of resistance-welded joints of glass fiber-reinforced polyphenylene sulfide (GF/PPS). To address this, pure titanium (Ti) meshes modified by micro-arc oxidation (MAO) and γ-aminopropyltriethoxy silane coupling agent (SCA) coupling agent were used as the HE to establish both micromechanical interlocking and molecular bonding between the dissimilar materials. The MAO process generated TiO₂-based surface layers containing microvoids and tunnel-like structures. Fourier transform infrared spectroscopy (FTIR) revealed that hydrogen bonds formed between the –NH₂ groups of the SCA and the C-S bonds of PPS. Simultaneously, interdiffusion occurred between the polysiloxane layer and PPS, resulting in a molecular chain interdiffusion layer (MCIL) at the bonding interface. Energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) analyses demonstrated a synergistic effect between MAO and SCA: MAO increased the hydroxyl group density on the Ti mesh, facilitating SCA grafting, which subsequently elevated surface free energy and improved the wetting and spreading behavior of PPS. This enhanced both mechanical interlocking and interfacial compatibility. Ultrasonic assistance further intensified the strengthening effects of MAO and SCA. The highest LSS of GF/PPS joints, 27.2 MPa, was achieved using Ti mesh treated with both MAO and SCA, representing the highest reported value to date.

聚合物基体与金属加热元件（HE）之间的弱界面结合限制了玻璃纤维增强聚苯硫醚（GF/PPS）电阻焊接头搭接剪切强度（LSS）的进一步提高。为了解决这一问题，采用微弧氧化（MAO）和γ-氨基丙基三乙氧基硅烷偶联剂（SCA）偶联剂改性纯钛（Ti）网作为HE，在不同材料之间建立微机械联锁和分子键。MAO工艺生成了含有微孔洞和隧道状结构的二氧化钛基表面层。傅里叶变换红外光谱（FTIR）显示，SCA的-NH2基团与PPS的C-S键之间形成了氢键。同时，聚硅氧烷层与PPS之间发生互扩散，在键合界面形成分子链互扩散层（MCIL）。能谱（EDS）、x射线衍射（XRD）和x射线光电子能谱（XPS）分析表明MAO和SCA之间存在协同效应：MAO增加了Ti网上的羟基密度，促进了SCA接枝，从而提高了表面自由能，改善了PPS的润湿和扩散行为。这增强了机械联锁和界面兼容性。超声辅助进一步增强了MAO和SCA的强化作用。用MAO和SCA处理的Ti网达到了GF/PPS关节的最高LSS，为27.2 MPa，是迄今为止报道的最高值。

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引用次数: 0

CNT reinforced Cu-based composites: Dispersion, interface and machine learning-assisted collaborative optimization strategies 碳纳米管增强铜基复合材料：分散、界面和机器学习辅助协同优化策略

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-04-01 Epub Date: 2026-01-06 DOI: 10.1016/j.compositesa.2026.109565

XianFeng Zhao, ChangChun Ge

The intrinsic trade-off between tensile strength and electrical conductivity remains the central obstacle in developing high-performance copper matrix composites. Carbon nanotubes (CNTs) offer remarkable reinforcement to mechanical properties but inevitably compromise conductivity. Despite advances in dispersion techniques and interfacial engineering, achieving efficient synergistic optimization of both properties is still constrained by the trial-and-error nature of conventional approaches. This review highlights recent progress in CNTs/Cu composites, emphasizing dispersion control, interfacial structure design, and strategies for balancing mechanical and electrical performance. Particular attention is given to emerging machine learning (ML)-assisted methodologies that integrate experimental and simulation data to unravel complex multi-parameter interactions. Among these, Physics-Informed Machine Learning (Physics-Informed ML) demonstrates strong potential to overcome performance bottlenecks, providing a transferable pathway for multi-property optimization in CNTs/Cu and other CNT-reinforced composites.

抗拉强度和导电性之间的内在权衡仍然是开发高性能铜基复合材料的主要障碍。碳纳米管（CNTs）提供了显著的机械性能增强，但不可避免地损害了导电性。尽管在分散技术和界面工程方面取得了进步，但要实现这两种性质的有效协同优化仍然受到传统方法的试错性质的限制。本文综述了CNTs/Cu复合材料的最新进展，重点介绍了分散控制、界面结构设计以及平衡机械和电气性能的策略。特别关注新兴的机器学习（ML）辅助方法，这些方法集成了实验和模拟数据，以揭示复杂的多参数交互。其中，物理信息机器学习（物理信息ML）显示出克服性能瓶颈的强大潜力，为CNTs/Cu和其他碳纳米管增强复合材料的多性能优化提供了可转移的途径。

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引用次数: 0

Damage monitoring of GFRP laminates via electrical measurements: Experiments and predictions 玻璃钢层压板的电气测量损伤监测：实验与预测

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-04-01 Epub Date: 2026-01-17 DOI: 10.1016/j.compositesa.2026.109588

A. Gazzola , P.A. Carraro , D. Gibhardt , M. Walter , B. Fiedler , M. Quaresimin , M. Zappalorto

In this work, an experimental investigation is presented on the early-stage fatigue damage of conductive glass/epoxy cross-ply laminates. The study is specifically designed to generate a comprehensive and consistent experimental dataset suitable for the validation of an analytical model previously developed by the authors.

Fatigue tests were performed under controlled loading conditions, while transverse matrix cracking in the 90° plies was continuously monitored together with stiffness degradation and changes in electrical resistance. These measurements provide a detailed dataset that enables correlation between mechanical damage and electrical response. The data were then used to validate the analytical model developed by the authors, which predicts stiffness degradation as a function of the resistance change induced by transverse cracking.

The good agreement between model predictions and experimental observations confirms the suitability of the adopted experimental approach and supports the use of electrical resistance measurements as a quantitative tool for model-based assessment of early-stage damage in conductive GFRP laminates.

本文对导电玻璃/环氧树脂交叉层合板的早期疲劳损伤进行了实验研究。该研究旨在生成一个全面和一致的实验数据集，适用于验证作者先前开发的分析模型。在可控载荷条件下进行疲劳试验，同时连续监测90°层的横向基体开裂、刚度退化和电阻变化。这些测量提供了一个详细的数据集，可以实现机械损伤和电气响应之间的相关性。这些数据随后被用于验证作者开发的分析模型，该模型预测刚度退化是横向开裂引起的阻力变化的函数。模型预测和实验观察之间的良好一致性证实了所采用的实验方法的适用性，并支持将电阻测量作为基于模型的导电玻璃钢层合板早期损伤评估的定量工具。

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引用次数: 0

Ballistic behavior of bi-axial pre-tensioned textile-laminate composite structure 双轴预张拉纺织-层压复合材料结构的弹道性能

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-04-01 Epub Date: 2026-01-06 DOI: 10.1016/j.compositesa.2026.109567

Jian Wei , Haoxiang Wang , Shenghua Shang , Tian Jian Lu , Jiagui Liu , Jian Deng , Han Meng , Jinling Gao

This study proposed a novel impact-resistant composite structure integrating bi-axial pre-tensioned aramid fabric with composite laminates and experimentally investigated its ballistic response. A custom fixture was designed to ensure stable specimen clamping and enable real-time bi-axial preload monitoring and adjustment. Using a single-stage light gas gun combined with high-speed photography, the dynamic deformation and failure processes under high-velocity impact were captured. An in-plane scale-based method was developed to measure back face signature, facilitating characterization of out-of-plane deformation, transverse wave propagation, and residual projectile velocity. Post-impact analysis via optical macrography and scanning electron microscopy (SEM) revealed macro-meso-micro multiscale failure morphologies. Results indicated that, unlike conventional monolithic fabrics or composites, the proposed structure exhibited four distinct failure modes under ballistic impact, dependent on preload and impact velocity. Three critical velocities were identified, corresponding to the penetration resistance of the aramid laminate, the perforation resistance of the aramid fabric, and the overall penetration resistance of the composite structure. Furthermore, both the ballistic limit and energy absorption initially increase and then decrease with increasing preload, reaching peak values of 458.45 m/s and 211.23 J, respectively, at a preload of 500 N. Preload was also found to effectively reduce out-of-plane deformation during high-velocity impact while accelerating transverse wave propagation, thereby enhancing energy dissipation efficiency.

提出了一种将双轴预拉伸芳纶织物与复合层压板相结合的新型抗冲击复合材料结构，并对其弹道响应进行了实验研究。设计了定制夹具，以确保稳定的试样夹紧，并实现实时双轴预紧监测和调整。采用单级光气枪结合高速摄影技术，捕捉了高速冲击下的动态变形和破坏过程。提出了一种基于面内尺度的背面特征测量方法，便于对面外变形、横波传播和残余弹丸速度进行表征。撞击后通过光学宏观和扫描电镜（SEM）分析揭示了宏观-细观-微观多尺度的破坏形态。结果表明，与传统的单片织物或复合材料不同，该结构在弹道冲击下表现出四种不同的破坏模式，这取决于预载荷和冲击速度。确定了三个临界速度，分别对应芳纶层板的穿透阻力、芳纶织物的穿透阻力和复合材料结构的整体穿透阻力。随着预紧力的增大，弹道极限和能量吸收均呈现先增大后减小的趋势，在预紧力为500 n时分别达到峰值458.45 m/s和211.23 J，预紧力还能有效减少高速撞击时的面外变形，加速横波传播，从而提高能量耗散效率。

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引用次数: 0

Aromatic π–π interaction–driven sizing strategy for enhanced interfacial adhesion in carbon fiber/PPESK thermoplastic composites 芳香族π -π相互作用驱动的施胶策略增强碳纤维/PPESK热塑性复合材料的界面附着力

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-04-01 Epub Date: 2026-01-02 DOI: 10.1016/j.compositesa.2025.109551

Yaoxin Xie, Yining Wang, Yu Deng, Zhimin Wang, Wenhui Zhou, Cheng Liu, Xigao Jian, Yousi Chen

Carbon fiber reinforced thermoplastic composites (CFRTPs) often exhibit limited mechanical performance due to weak interfacial adhesion between carbon fibers and the thermoplastic matrix. In this work, a series of heteroaromatic poly(arylene ether ketone)s (PPFEKs) were synthesized by varying the molar ratio between 4-(4-hydroxyphenyl)phthalazin-1(2H)-one (DHPZ) and 9,9-bis(4-hydroxyphenyl)fluorene (BPF) to serve as sizing agents for desized carbon fibers. Experimental characterizations and molecular dynamics (MD) simulations jointly revealed that PPFEKs strongly adsorbed on carbon fiber surfaces through π–π stacking interactions. The optimized formulation (BPF:DHPZ = 7:3) significantly enhanced interfacial bonding, yielding flexural and interlaminar shear strengths of 1749 MPa and 81.9 MPa—43 % and 47 % higher than the desized composite, respectively. Raman microspectroscopy provided direct spectroscopic evidence of π–π electronic coupling at the interface. This study establishes a π–π interaction–driven sizing strategy for efficient interfacial engineering, offering a practical and scalable route to improve the mechanical performance of CFRTPs.

碳纤维增强热塑性复合材料（CFRTPs）由于碳纤维与热塑性基体之间的界面附着力较弱，往往表现出有限的机械性能。本文通过改变4-（4-羟基苯基）酞嗪-1(2H)- 1（DHPZ）和9,9-双（4-羟基苯基）芴（BPF）的摩尔比，合成了一系列杂芳香聚芳醚酮（PPFEKs），作为浆料碳纤维的上浆剂。实验表征和分子动力学（MD）模拟共同表明，PPFEKs通过π -π堆积相互作用在碳纤维表面进行了强吸附。优化后的配方（BPF:DHPZ = 7:3）显著增强了复合材料的界面结合，屈服弯曲强度为1749 MPa，层间剪切强度为81.9 MPa，分别比浆化后的复合材料提高了43%和47%。拉曼微光谱提供了界面处π -π电子耦合的直接光谱证据。本研究建立了一种π -π相互作用驱动的高效界面工程施胶策略，为提高cfrtp的力学性能提供了一条实用且可扩展的途径。

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引用次数: 0

Hybridising self-reinforced polypropylene with flax fibres 自增强聚丙烯与亚麻纤维的杂交

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-04-01 Epub Date: 2026-01-01 DOI: 10.1016/j.compositesa.2025.109553

Paul Woody , Jonas Van Damme , Yentl Swolfs

Self-reinforced polypropylene (SRPP) is a lightweight and tough material, but its relatively low stiffness limits the number of potential applications. Hybridisation, whereby an optimised volume fraction (V_f) of low elongation (LE) fibre is used to reinforce the ductile polypropylene (PP), is a method used for improving initial stiffness whilst retaining a pseudo-ductile failure. However, as the V_f of LE fibre within the hybrid is increased, the ability to retain a ductile failure mode diminishes. This work assesses whether twisting PP tapes to form a PP yarn and weaving them using a novel 3D angle interlocking weave, can be beneficial for maintaining the pseudo-ductile response at greater V_f’s of LE reinforcement (in this case aligned flax fibres). A comparison is made with hybrids manufactured using flat tape weaves (twill 2/2) with tensile strength, penetration impact resistance and interlayer bond strength assessed. With a hybrid flax V_f of 11%, the initial stiffness of the 3D woven SRPP was increased by 165%, whilst retaining 87% of the baseline SRPP strength and 98% of the failure strain. This work successfully demonstrates the advantages of employing a novel 3D angle-interlocking weave to produce interlayer SRPP composites reinforced with flax fibres.

自增强聚丙烯（SRPP）是一种轻质且坚韧的材料，但其相对较低的刚度限制了潜在应用的数量。杂化是一种优化的低伸长率（LE）纤维体积分数（Vf）来增强延性聚丙烯（PP）的方法，它可以提高初始刚度，同时保持伪延性破坏。然而，随着混合材料中LE纤维的Vf增加，保持延性破坏模式的能力减弱。本研究评估了缠绕PP带形成PP纱并使用新型3D角度互锁编织是否有利于在较大的LE增强（在这种情况下是排列的亚麻纤维）的Vf下保持伪延性响应。与使用平带编织（斜纹2/2）制造的混合材料进行了比较，评估了抗拉强度、抗渗透冲击能力和层间粘合强度。当混合亚麻Vf为11%时，3D编织SRPP的初始刚度增加了165%，同时保留了基线SRPP强度的87%和失效应变的98%。这项工作成功地证明了采用一种新颖的三维角度互锁组织来生产亚麻纤维增强的层间SRPP复合材料的优点。

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引用次数: 0

Enhancing interfacial adhesion and self-healing in PMMA-MAA glass fibre composites via Zn(II)-acetate complexation 通过锌(II)-醋酸酯络合增强PMMA-MAA玻璃纤维复合材料的界面粘附和自愈

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-04-01 Epub Date: 2026-01-16 DOI: 10.1016/j.compositesa.2026.109578

Clément Mugemana , Carlos I. Cardona , Samet Ozyigit , Jianqun Hao , Patrick Grysan , Doriane Delfrari , Reiner Dieden , Pierre Verge , Alexander S. Shaplov , David Ruch , Carlos A. Fuentes

Infusible thermoplastics based on acrylic resins have gained increasing interest in fibre-reinforced composite manufacturing, primarily due to their low viscosity (100 mPa), enabling efficient fibre impregnation and facilitates processing at low temperatures (<100 °C). Their compatibility with UV and thermal curing system offers further manufacturing flexibility. To integrate self-healing ability, a UV-curable acrylic resin incorporating Zn(II)-acetate complexes as reversible cross-links was developed. Self-healing performance at the fibre–matrix interface was quantitatively evaluated using a novel single-fibre pull-out test methodology employing, real-time optical crack monitoring and paused healing cycles combined with µ-CT tomography for 3D interfacial validation. This approach demonstrated up to 95% recovery of the apparent interfacial shear strength (IFSS). Functionalizing glass fibres with Zn(OAc)₂ significantly improved baseline interfacial adhesion (35% IFSS increase) while maintaining self-healing capability, outperforming conventional epoxy/acrylic sizings. Structural glass fibre-reinforced composites were manufactured using the Vacuum-Assisted Resin Infusion Molding (VARIM) process, and the healing effect of Zn(OAc)₂ complexes was demonstrated by achieving an 85% recovery of the interlaminar shear strength (ILSS) after delamination and subsequent thermal healing treatment. This work presents a scalable approach to integrating self-healing functionality into acrylic-based composites for enhanced structural durability.

基于丙烯酸树脂的不熔热塑性塑料在纤维增强复合材料制造中获得了越来越多的兴趣，主要是因为它们的低粘度（100 mPa），能够有效地浸渍纤维，并且便于在低温（100°C）下加工。它们与UV和热固化系统的兼容性提供了进一步的制造灵活性。为了提高丙烯酸树脂的自愈能力，研制了一种以锌(II)-乙酸酯配合物为可逆交联的紫外光固化丙烯酸树脂。采用新颖的单纤维拔出测试方法定量评估纤维基质界面的自修复性能，该方法采用实时光学裂纹监测和暂停修复周期，并结合微ct断层扫描进行3D界面验证。该方法表明，表观界面剪切强度（IFSS）可恢复95%。用Zn(OAc)2功能化玻璃纤维显著提高了基线界面附着力（IFSS增加35%），同时保持了自修复能力，优于传统的环氧/丙烯酸浆料。采用真空辅助树脂注射成型（VARIM）工艺制备了结构玻璃纤维增强复合材料，并通过分层和随后的热愈合处理实现了85%的层间剪切强度（ILSS）恢复，证明了Zn(OAc)2配合物的愈合效果。这项工作提出了一种可扩展的方法，将自修复功能集成到丙烯酸基复合材料中，以增强结构耐久性。

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引用次数: 0

Modeling pseudo-ductile failure in hybrid fiber composites using an FFT-based solver with non-periodic boundary conditions 基于非周期边界条件的fft求解器模拟混杂纤维复合材料的伪延性破坏

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-04-01 Epub Date: 2026-01-24 DOI: 10.1016/j.compositesa.2026.109599

Rui Cao , Xiaoqiang Wang , Zhongliang Yu , Chaonan Cong , Xiaoding Wei , Huiqi Ren

Fast Fourier Transform (FFT)-based micromechanical solvers are widely recognized for their computational efficiency, yet their classical formulations naturally favor periodic boundary conditions (PBCs). To simulate the mechanical response of hybrid fiber-reinforced laminates under realistic non-periodic constraints, this work implements a 2D FFT-based numerical framework adapted from established displacement decomposition strategies. By employing a Galerkin projection with numerical integration and a minimal one-pixel auxiliary layer, the method efficiently handles mixed Dirichlet and Neumann boundary conditions within the spectral solver context. The accuracy of this implementation is validated through comparison with Finite Element Method (FEM) simulations, showing excellent agreement in stress fields. The primary contribution of this study lies in utilizing this adapted framework to investigate the pseudo-ductile failure mechanisms of thin-ply carbon/glass hybrid laminates. The simulations successfully capture the experimentally observed transitions in damage modes, from intralaminar fragmentation to interfacial delamination, as the carbon ply thickness varies. Overall, this work demonstrates that this adapted FFT-based approach offers a fast and scalable alternative for modeling complex progressive damage in hybrid composites, providing valuable insights for the design of damage-tolerant architectures.

基于快速傅里叶变换（FFT）的微机械求解因其计算效率而得到广泛认可，但其经典公式自然倾向于周期边界条件（pbc）。为了模拟混杂纤维增强层合板在现实非周期约束下的力学响应，本工作实现了基于二维fft的数值框架，该框架采用了已建立的位移分解策略。该方法采用具有数值积分的伽辽金投影和最小的一像素辅助层，有效地处理了谱解上下文中的Dirichlet和Neumann混合边界条件。通过与有限元法（FEM）仿真的比较，验证了该方法的准确性，在应力场中显示出良好的一致性。本研究的主要贡献在于利用这种适应框架来研究薄层碳/玻璃杂化层压板的伪延性破坏机制。随着碳层厚度的变化，模拟成功地捕获了实验观察到的损伤模式的转变，从层内破碎到界面分层。总的来说，这项工作表明，这种基于fft的方法为混合复合材料中复杂的渐进损伤建模提供了一种快速和可扩展的替代方案，为损伤容忍架构的设计提供了宝贵的见解。

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引用次数: 0

Thermal induced anisotropic deformation of DCPD gels during frontal polymerization DCPD凝胶在正面聚合过程中的热诱导各向异性变形

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-04-01 Epub Date: 2025-12-16 DOI: 10.1016/j.compositesa.2025.109524

Xiyang Su , Weixi Gao , Sepideh Sadat Hosseini Noorabadi , Yihao Li , Patrick Ryan Galligan , Yapeng Chen , Xingyi Zhang , Jinglei Yang

As an emerging low-energy-consumption and rapid-processing technique, frontal polymerization (FP) has garnered increasing attention due to its significant potential in free-standing three-dimensional printing, advanced composite manufacturing etc. However, effects from thermal expansion, chemical shrinkage, and nonuniform reaction propagation during the FP process inevitably generate gradient deformations at the FP front, adversely affecting the mechanical properties of the final processed components. To elucidate the intrinsic deformation mechanisms of polymer materials during FP and optimize their mechanical performance after polymerization, we employ a representative dicyclopentadiene (DCPD) gel system for investigation. In this study, simultaneous temperature and strain measurement revealed anisotropic deformation patterns of DCPD gels during FP. Meanwhile, experimental and numerical studies investigated the strain evolution of DCPD gels during both single and multi-point initiation of FP, revealing that the maximum compressive strain in uncured regions gradually decreased with increasing pre-curing degree but increased with rising width. Finally, mechanical characterization results show that, as the pre-curing degree increases, both compressive and tensile performances of polydicyclopentadiene are progressively enhanced, with yield strengths under tension and compression at 77 K significantly exceeding those at room temperature. These findings provide an experimental and theoretical foundation for high-performance material fabrication based on FP of gel-state systems.

正面聚合技术作为一种新兴的低能耗、快速加工技术，因其在独立三维打印、先进复合材料制造等方面的巨大潜力而受到越来越多的关注。然而，在FP过程中，热膨胀、化学收缩和不均匀反应传播的影响不可避免地在FP前端产生梯度变形，对最终加工部件的力学性能产生不利影响。为了阐明高分子材料在FP过程中的固有变形机制，并优化聚合后的力学性能，我们采用具有代表性的双环戊二烯（DCPD）凝胶体系进行了研究。在这项研究中，同时测量温度和应变，揭示了DCPD凝胶在FP过程中的各向异性变形模式。同时，通过实验和数值研究，研究了单点和多点启动FP过程中DCPD凝胶的应变演化规律，发现未固化区域的最大压缩应变随预固化程度的增加而逐渐减小，但随预固化宽度的增加而增大。最后，力学表征结果表明，随着预固化程度的增加，聚双环戊二烯的抗压和抗拉性能逐渐增强，77 K下的拉伸和压缩屈服强度显著超过室温。这些发现为基于凝胶态体系FP制备高性能材料提供了实验和理论基础。

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引用次数: 0

Effect of stacking sequence on the electromagnetic shielding and mechanical properties of jute/graphite reinforced polylactic acid composites 堆积顺序对黄麻/石墨增强聚乳酸复合材料电磁屏蔽及力学性能的影响

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-04-01 Epub Date: 2026-01-01 DOI: 10.1016/j.compositesa.2025.109550

Hongyang Li, Jiahua Yang, Ni Wang, Lan Yao

Imparting electromagnetic (EM) shielding properties to the natural fiber reinforced composites is becoming necessary when they are applied in the signal transmission area. In this study, four types of jute/graphite hybrid fiber reinforced polylactic acid (PLA) composites and two types of pure fiber composites were designed, where jute and graphite fiber appeared in the form of jute fabric and graphite felt. As the graphite fiber is conductive, the four types of hybrid fiber composites and the pure graphite fiber composite were tested to have adequate EM shielding effectiveness. The composite with graphite felts as the top and bottom layers and jute fabrics as the two middle layers (GJJG composite) achieved the highest EM shielding effectiveness of 54.40 dB, indicating greater distance between the two conductive layers led to higher EM shielding effectiveness. Graphic models were built for analyzing the process of EM wave passing through the composites. GJJG still showed the optimum overall mechanical performance and its after-fracture mode exhibited different fiber-resin bonding behaviors from different fibers. The novel contribution of this research is providing the effect of fiber stacking sequences on EM shielding and mechanical properties, which is new and significantly important in natural fiber composite area.

天然纤维增强复合材料在信号传输领域的应用，需要赋予其电磁屏蔽性能。本研究设计了四种黄麻/石墨混杂纤维增强聚乳酸（PLA）复合材料和两种纯纤维复合材料，其中黄麻和石墨纤维以黄麻织物和石墨毡的形式出现。由于石墨纤维具有导电性，对四种混杂纤维复合材料和纯石墨纤维复合材料进行了电磁屏蔽性能测试。以石墨毡为上下两层，黄麻织物为中间两层的复合材料（GJJG复合材料）的电磁屏蔽效果最高，为54.40 dB，说明两导电层之间的距离越大，电磁屏蔽效果越好。建立了图形模型，分析了电磁波通过复合材料的过程。GJJG仍表现出最佳的综合力学性能，其断裂后模式表现出不同纤维的纤维-树脂结合行为。本研究的新颖贡献在于提供了纤维堆叠顺序对电磁屏蔽和力学性能的影响，这在天然纤维复合材料领域具有重要意义。

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引用次数: 0