Composites Part B: Engineering最新文献_第10页

Significant enhancement of interfacial strength of overmolded CF/PEEK components via Co-Consolidation with an LM-PAEK interlayer 通过与LM-PAEK中间层共固结，显著增强了复模CF/PEEK组件的界面强度

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-03-15 Epub Date: 2026-01-19 DOI: 10.1016/j.compositesb.2026.113429

Shuxu Bai , Yanrui Li , Zhijie Liu , Dong Quan , Jun Lin , Jia Liu , Xiangshan Kong , Guoqun Zhao

Injection molding of short carbon fiber (sCF)-reinforced thermoplastic composites onto continuous carbon fiber (cCF)-reinforced thermoplastic substrates has emerged as an advanced approach for the rapid manufacturing of aerospace components with complex geometries. However, the interfacial strength of overmolded joints is often constrained by insufficient molecular interdiffusion across the interface during molding. To overcome this limitation in carbon fiber reinforced polyetheretherketone (CF/PEEK) systems, a low-melting-point polyaryletherketone (LM-PAEK) resin interlayer (eRL) was co-consolidated onto the cCF/PEEK substrate prior to overmolding with sCF/PEEK, enabling the fabrication of T-shaped joints with enhanced interfacial integrity. Crucially, theoretical analysis based on a healing degree model revealed that the LM-PAEK interlayer enables substantial polymer chain diffusion (37.4 % healing degree) even without substrate preheating, whereas bare CF/PEEK exhibits negligible bonding (0 % healing) under the same conditions. Mechanical testing revealed that the incorporation of the eRL significantly increased bond strength, with average pull-off and lateral bending strengths improving by 62.9 % and 61.8 %, respectively, at the optimal substrate preheating temperature of 390 °C. Notably, effective interfacial bonding between the sCF/PEEK and cCF/PEEK composites was also achieved without substrate preheating. Moreover, further optimization of interfacial mechanical properties was accomplished by tailoring the interfacial area and eRL thickness. Overall, these results demonstrate that the introduction of an LM-PAEK interlayer provides a robust and efficient strategy for strengthening overmolding interfaces in thermoplastic composites, delivering both superior mechanical performance and enhanced processing flexibility.

在连续碳纤维（cCF）增强热塑性塑料基板上注射成型短碳纤维（sCF）增强热塑性复合材料已成为快速制造具有复杂几何形状的航空航天部件的一种先进方法。然而，过度模压接头的界面强度往往受到模压过程中分子在界面上的相互扩散不足的限制。为了克服碳纤维增强聚醚醚酮（CF/PEEK）系统的这一局限性，在与sCF/PEEK进行复模之前，将低熔点聚醚醚酮（LM-PAEK）树脂中间层（eRL）共固结在cCF/PEEK基板上，从而制造出具有增强界面完整性的t形接头。至关重要的是，基于愈合度模型的理论分析表明，即使没有衬底预热，LM-PAEK夹层也能实现大量聚合物链扩散（37.4%愈合度），而在相同条件下，裸CF/PEEK的键合可以忽略不计（0%愈合）。力学测试表明，在390°C的预热温度下，eRL的加入显著提高了结合强度，平均拉脱强度和横向弯曲强度分别提高了62.9%和61.8%。值得注意的是，在没有衬底预热的情况下，sCF/PEEK和cCF/PEEK复合材料之间也实现了有效的界面结合。此外，通过调整界面面积和eRL厚度，进一步优化界面力学性能。总的来说，这些结果表明，LM-PAEK中间层的引入为加强热塑性复合材料的覆盖界面提供了一种强大而有效的策略，提供了卓越的机械性能和增强的加工灵活性。

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引用次数: 0

Fabrication via layered precursors and performance of N-doped biomass-carbon/ZnO/In2O3 composite photocatalyst for organic pollutant degradation 层状前驱体制备及n掺杂生物质-碳/ZnO/In2O3复合光催化剂降解有机污染物的性能

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-03-15 Epub Date: 2026-01-06 DOI: 10.1016/j.compositesb.2026.113381

Zhaoping Jia , Yufan Zhou , Ruiyao Xiao , Jiandu Lei , Jing Liu

Layered double hydroxides (LDHs) have emerged as promising photocatalysts for effective pollutant degradation in wastewater treatment. In this study, a visible-light-responsive ZnO/In₂O₃ composite photocatalyst incorporated with biomass-derived carbon ([email protected]) was synthesized via controlled calcination of Zn/In-containing binary LDH precursors with biomass carbon sources. The optimized [email protected] composite demonstrated remarkable performance in synergistic adsorption and photocatalytic degradation of crystal violet (CV), achieving high degradation efficiency (97.46 %) for 2000 mg/L CV under 460 nm LED light - significantly superior to the 54.79 % efficiency of pristine ZnIn-LDO. The photodegradation kinetic constant of [email protected] was 8.4 times higher than that of ZnIn-LDO. Systematic characterization revealed that the optimal BC incorporation engineered the optical and surface properties: it narrowed the bandgap, enhanced visible-light absorption, increased specific surface area, and most importantly, drastically promoted the separation and transfer of photogenerated carriers. Mechanistic studies identified that the improved charge dynamics drive an efficient oxygen reduction pathway, where superoxide radicals (·O₂⁻) and hydroxyl radicals (·OH), generated via H₂O₂ intermediates, serve as the dominant active species. The degradation intermediates exhibited reduced phytotoxicity. This work provides a novel strategy for developing high-performance LDH-based photocatalysts by coupling biomass carbon to optimize interfacial charge separation and reaction kinetics.

层状双氢氧化物（LDHs）在废水处理中成为一种很有前途的光催化剂，可以有效地降解污染物。在这项研究中，通过控制生物质碳源对含Zn/In二元LDH前驱体的煅烧，合成了一种可见光响应的ZnO/In2O3复合光催化剂。优化后的[email protected]复合材料在460 nm LED光下对结晶紫（CV）的协同吸附和光催化降解性能显著，对2000 mg/L的CV的降解效率高达97.46%，显著优于原始zni - ldo的54.79%。[email protected]的光降解动力学常数是zni - ldo的8.4倍。系统表征表明，最佳的BC掺入设计了光学和表面性质：它缩小了带隙，增强了可见光吸收，增加了比表面积，最重要的是，极大地促进了光生载流子的分离和转移。机制研究发现，改进的电荷动力学驱动了有效的氧还原途径，其中过氧化氢中间体产生的超氧自由基（·O2−）和羟基自由基（·OH）是主要的活性物质。降解中间体表现出较低的植物毒性。本研究为通过耦合生物质碳来优化界面电荷分离和反应动力学，开发高性能ldh基光催化剂提供了一种新的策略。

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引用次数: 0

Biaxial mechanical response of plain-woven CFRP tubes under combined tension–torsion based on acoustic-optical measurements 基于声光测量的CFRP平编织管在拉扭联合作用下的双轴力学响应

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-03-15 Epub Date: 2026-01-22 DOI: 10.1016/j.compositesb.2026.113436

Zhen Liu , Yifan Yue , Heng Han , Zhenqiang Zhao , Bo Wang , Yulong Li

Multiaxial loading experiments and damage characterization of carbon fiber reinforced polymer (CFRP) composites are of significant importance for their operation under complex service conditions. In this paper, the mechanical properties, damage evolution, and failure mechanisms of plain-woven CFRP tubes under combined tension–torsion loads are quantitatively investigated by integrating three-dimensional digital image correlation and acoustic emission (AE) techniques. The results indicate that the distributions of strain fields within the woven structure of the composite tube exhibit distinct differences under different load conditions. Shear loading influences the average axial tensile strain, while tension loading significantly enhances the shear strength and shear modulus of the tube. Improved schemes for failure criteria are proposed that are based on the shear strengthening effect of the tension–shear stress plane, and the AE signal characteristics were analyzed to categorize the damage types based on peak frequencies. As the normalized cumulative acoustic energy can serve as a damage factor for the quantification of both damage evolution and damage envelope flow, it assisted in further establishing a stress state–dependent damage assessment model. A combined analysis of the multiscale fracture characteristics of the CFRP tubes demonstrates that various types of damage exhibit distinct initiation and propagation mechanisms under different dominant stress types, and the damage patterns for the same damage type also vary across different locations within the woven structure. These variations ultimately influence the direction of crack propagation.

碳纤维增强聚合物（CFRP）复合材料的多轴加载试验和损伤表征对其在复杂使用条件下的运行具有重要意义。本文采用三维数字图像相关和声发射（AE）技术，定量研究了碳纤维布平纹编织管在拉扭复合载荷作用下的力学性能、损伤演化及破坏机制。结果表明：在不同载荷条件下，复合材料管材编织结构内部的应变场分布存在明显差异。剪切加载影响钢管的平均轴向拉伸应变，而拉伸加载显著提高钢管的抗剪强度和剪切模量。提出了基于拉-剪应力面剪切强化效应的破坏准则改进方案，并分析了声发射信号特征，基于峰值频率对损伤类型进行了分类。由于归一化的累积声能可以作为损伤因子来量化损伤演化和损伤包络流，有助于进一步建立依赖于应力状态的损伤评估模型。综合分析碳纤维布筒的多尺度断裂特征表明，在不同的主应力类型下，不同类型的损伤表现出不同的起裂和扩展机制，同一类型损伤在编织结构内不同位置的损伤模式也存在差异。这些变化最终影响裂纹扩展的方向。

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引用次数: 0

Tailored cross-helicoidal architectures for enhanced low-velocity impact resistance in hybrid composites 定制的交叉螺旋结构，增强混合复合材料的低速抗冲击性

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-03-15 Epub Date: 2026-01-14 DOI: 10.1016/j.compositesb.2026.113407

Li Liu , Guangyuan Peng , Zhonghua Wang , Qiong Wang , Rui Chen

This study performs a parametric effect analysis on the carbon/glass fiber hybrid laminates with a fixed hybrid ratio. Firstly, a novel tailored cross-helicoidal approach is proposed for the ply sequence. The proposed approach is applied to redesign two conventional helicoidal structures (the hybrid-helicoidal structure and the cross-helicoidal structure). The impact performance of the redesigned configurations is significantly improved, with the peak load and rebound kinetic energy increased by up to 29.82 % and 41.06 %, respectively. The tailored cross-helicoidal configuration leads to a tortuous matrix cracking path, which contributes to enhancing the resistance to damage initiation and growth. Moreover, the helicoidal configurations promote widespread and subcritical delamination damage, which helps prevent severe localized damage and reduces the risk of perforation in later stages. Subsequently, based on the tailored cross-helicoidal configuration, the effect of design variables (stacking sequence, interfacial parameters and ply angle accuracy) on the impact resistance of carbon/glass hybrid laminates is investigated. The analysis reveals that an optimal stacking sequence should balance the contribution of each component's properties and the number of modulus-mismatch interfaces. Laminates with moderate interfacial stiffness and strength, coupled with high interfacial fracture energy, exhibit better impact resistance. Additionally, the discussion on ply angle accuracy demonstrates that the tailored cross-helicoidal configurations show low sensitivity to layup accuracy: the maximum percentage difference in impact response indicators between laminates with 5.0° and 0.1° accuracy is only 4.1 %. This work elucidates the fundamental reinforcement mechanisms of helicoidal architectures and provides design guidelines for advanced hybrid composite laminates.

本研究对固定混合比的碳/玻璃纤维复合层压板进行了参数效应分析。首先，提出了一种新颖的定制交叉螺旋线方法。将该方法应用于两种传统螺旋结构（混合螺旋结构和交叉螺旋结构）的再设计。重新设计后的冲击性能得到了显著改善，峰值载荷和回弹动能分别提高了29.82%和41.06%。量身定制的交叉螺旋结构使得基体的裂纹路径更加曲折，从而提高了抗损伤萌生和生长的能力。此外，螺旋结构促进了广泛的亚临界分层损伤，有助于防止严重的局部损伤，降低后期穿孔的风险。随后，基于定制的交叉螺旋结构，研究了设计变量（堆叠顺序、界面参数和铺层角度精度）对碳/玻璃杂化层压板抗冲击性能的影响。分析表明，最优的堆叠顺序应平衡各部件性能的贡献和模不匹配接口的数量。层合板界面刚度和强度适中，界面断裂能较高，具有较好的抗冲击性能。此外，关于铺层角精度的讨论表明，定制的交叉螺旋结构对铺层精度的敏感性较低：5.0°和0.1°精度的层压板之间的冲击响应指标的最大百分比差异仅为4.1%。这项工作阐明了螺旋结构的基本增强机制，并为先进的混合复合材料层合板的设计提供了指导。

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引用次数: 0

Omnidirectional wireless power transfer via magnetoelectric composite transducer arrays for untethered bioelectronic systems 无系绳生物电子系统中通过磁电复合换能器阵列的全向无线电力传输

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-03-15 Epub Date: 2026-01-13 DOI: 10.1016/j.compositesb.2026.113403

Yizong Li, Kaiying Zhao, Yiting Zheng, Penghao Dong, Si Chen, Su Li, David Hwang, Shanshan Yao

Angular or lateral misalignment remains a critical challenge in practical wireless power transfer (WPT) for bioelectronic systems, where the receiver (RX) continuously changes orientation relative to the transmitter (TX). Here, we report an omnidirectional magnetoelectric transducer array (OMETA) that enables compact, efficient, and misalignment-tolerant WPT using a triaxial configuration of orthogonally arranged laminated magnetoelectric (ME) composites. The orthogonal geometry ensures directional redundancy, maintaining stable voltage output regardless of RX orientation. With a total magnetoelectric composite transducer volume of only 6.6 mm³ (total receiver volume of 165 mm³), OMETA achieves superior output uniformity (V_max/V_min = 1.25) and delivers a peak voltage of 7.12 V under a 0.5 mT alternating magnetic field, surpassing state-of-the-art omnidirectional WPT devices that are orders of magnitude larger. Additionally, OMETA tolerates lateral misalignments up to 15 mm (around 2 body lengths) with minimal voltage degradation. Functional demonstrations include wireless powering of LED arrays and rapid charging of capacitors. As proof-of-concept applications, OMETA is integrated into a Venus flytrap enabled phytoactuator to provide electrical stimulation for biohybrid actuation. Moreover, OMETA serves as both a magnetic actuator and a wireless power source for the untethered capsule robot during gastrointestinal navigation. These results establish OMETA as a high-performance, miniaturized platform for alignment-independent wireless power transfer in next-generation untethered bioelectronic systems.

在生物电子系统的实际无线电力传输（WPT）中，角度或横向不对准仍然是一个关键挑战，其中接收器（RX）相对于发射器（TX）不断改变方向。在这里，我们报告了一种全向磁电换能器阵列（OMETA），它使用正交排列的层压磁电（ME）复合材料的三轴结构实现紧凑，高效和容错的WPT。正交几何结构确保了方向冗余，无论RX方向如何，都能保持稳定的电压输出。由于磁电复合换能器的总体积仅为6.6 mm3（接收器的总体积为165 mm3）， OMETA实现了卓越的输出均匀性（Vmax/Vmin = 1.25），并在0.5 mT交变磁场下提供7.12 V的峰值电压，超过了最先进的全向WPT器件。此外，OMETA可以容忍横向错位达15毫米（约2个身体长度），电压下降最小。功能演示包括LED阵列的无线供电和电容器的快速充电。作为概念验证应用，OMETA被集成到一个维纳斯捕蝇器植物致动器中，为生物混合驱动提供电刺激。此外，在胃肠导航过程中，OMETA可以作为无系绳胶囊机器人的磁致动器和无线电源。这些结果表明，OMETA是一种高性能、小型化的平台，可用于下一代无系绳生物电子系统中与对准无关的无线电力传输。

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引用次数: 0

Stable and efficient robotic stitching system for manufacturing complex composite preforms 用于制造复杂复合预制体的稳定高效的机器人拼接系统

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-03-15 Epub Date: 2025-12-27 DOI: 10.1016/j.compositesb.2025.113363

Xuehao Shan , Jun Wang , Haoda Yang , Weihao Wang , Chenchen Tan , Zheng Sun , Chunhui Gao , Hao Huang

The introduction of three-dimensional (3D) stitched preforms has provided a novel approach to material selection in the field of composite materials. 3D flat and complex stitched preforms are extensively applied across multiple fields. This research proposed a robotic stitching system that integrates active tension control and dynamic feed compensation to mitigate motion discontinuities and thread tension fluctuations in composite preform stitching. A novel single-sided stitching head was mounted on a six-degree-of-freedom robotic arm. Key innovations include an active tension control mechanism and a feed compensation mechanism. The active tension control mechanism estimates instantaneous thread demand within each stitching cycle and uses tension sensor feedback to dynamically adjust thread roller speed, thereby maintaining precise thread tension. During stitching needle penetration, the feed compensation mechanism drives the stitching end-effector in the reverse direction to offset manipulator displacement. This enables the robotic arm to perform continuous feeding and eliminates high-frequency start-stop events. Experiments on flat plate preform showed that the system operated stably across key process parameters, including thread tension (0.1 N–1.0 N), thread material (Kevlar, carbon and polyimide fiber), diameter (0.2 mm–0.6 mm), and stitching pitch (6 mm–10 mm). In the variable-curvature truncated cone experiment, the feed compensation mechanism enabled continuous feeding. Compared with the condition without feed compensation, the stitching efficiency increased by 24.7 %. The system is capable of adapting to preforms with various shapes, sizes, and stitching parameters, offering a reliable solution for the stable and efficient stitching of complex composite preforms.

三维缝合预制体的引入为复合材料领域的材料选择提供了一种新的途径。三维平面和复杂的缝合预制体广泛应用于多个领域。提出了一种结合主动张力控制和动态进给补偿的机器人拼接系统，以减轻复合预制棒拼接过程中的运动不连续和螺纹张力波动。将一种新型的单面拼接头安装在六自由度机械臂上。关键的创新包括主动张力控制机构和进给补偿机构。主动张力控制机构估计每个缝制周期内的瞬时螺纹需求，并利用张力传感器反馈动态调节螺纹辊速度，从而保持精确的螺纹张力。缝针穿入过程中，进给补偿机构反向驱动缝针末端执行器以抵消机械手位移。这使机械臂能够执行连续馈送，并消除高频启停事件。在平板预制件上的实验表明，该系统在螺纹张力（0.1 N - 1.0 N）、螺纹材料（凯夫拉纤维、碳和聚酰亚胺纤维）、直径（0.2 mm - 0.6 mm）和钉距（6 mm - 10 mm）等关键工艺参数上运行稳定。在变曲率截锥实验中，进给补偿机构实现了连续进给。与无进给补偿相比，拼接效率提高了24.7%。该系统能够适应各种形状、尺寸和拼接参数的预制件，为复杂复合材料预制件的稳定、高效拼接提供了可靠的解决方案。

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引用次数: 0

Two-in-one demonstration of anisotropic thermal management and near-field EMI shielding via vertically aligned carbon fibers composites in electronic packaging 电子封装中垂直排列碳纤维复合材料的各向异性热管理和近场电磁干扰屏蔽的二合一演示

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-03-15 Epub Date: 2026-01-14 DOI: 10.1016/j.compositesb.2026.113414

Shulin Lei , Dingkun Tian , Jingke Wang , Jiangdong Cui , Ziyu Duan , Yadong Xu , Xi Lu , Rong Sun , Yougen Hu

The relentless advancement of communication technology and high-performance computing subjects integrated miniaturized electronics to severe thermal loads and electromagnetic interference (EMI) within stringent spatial constraints. To address these dual challenges, this study presents a composite comprising aligned carbon fibers, SnBiAg alloy particles, and silicone gel (denoted as CSS) for simultaneous EMI shielding and thermal management, fabricated via extrusion processing and systematic optimization of filler concentration and alignment angle. This architecture facilitates continuous axial pathways for both phonon and electron transport, owing to the vertically oriented carbon fibers, while the uniformly dispersed SnBiAg particles enhance interfacial thermal and electrical connectivity. Consequently, the composite demonstrates exceptional comprehensive performance: the through-plane thermal conductivity reaches 11.98 W m⁻¹ K⁻¹, while the average near-field shielding effectiveness (NF-SE) attains an impressive −57.61 dB across the 0.5–6 GHz band, significantly outperforming composites with randomly or horizontally aligned fillers. Utilizing a custom-designed integrated testing model, the heat dissipation and near-field EMI suppression capabilities of CSS-32.5/90° are two-in-one validated, confirming that CSS-32.5/90° surpasses commercial thermal pads in both key aspects. The scalable fabrication approach coupled with the high-performance composite offers a promising integrated solution for thermal management and EMI shielding in electronic packaging.

通信技术和高性能计算学科的不断进步将小型化电子设备集成到严格的空间限制内的严重热负荷和电磁干扰（EMI）中。为了解决这些双重挑战，本研究提出了一种复合材料，包括排列的碳纤维，SnBiAg合金颗粒和硅凝胶（表示为CSS），用于同时屏蔽EMI和热管理，通过挤压加工和系统优化填料浓度和排列角度制备。由于垂直取向的碳纤维，这种结构有利于声子和电子传递的连续轴向路径，而均匀分散的SnBiAg粒子增强了界面的热和电连通性。因此，该复合材料表现出卓越的综合性能：通平面导热系数达到11.98 W m−1 K−1，而平均近场屏蔽效能（NF-SE）在0.5-6 GHz频段达到令人印象深刻的−57.61 dB，显著优于随机或水平排列填料的复合材料。利用定制的集成测试模型，对CSS-32.5/90°的散热和近场EMI抑制能力进行了二合一验证，确认CSS-32.5/90°在这两个关键方面都优于商用热垫。可扩展的制造方法与高性能复合材料相结合，为电子封装中的热管理和EMI屏蔽提供了一个有前途的集成解决方案。

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引用次数: 0

UIT-GAN: A cross-modal generative model for ultrasonic infrared thermography detection of impact damage in composites 超声红外热成像检测复合材料冲击损伤的跨模态生成模型

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-03-15 Epub Date: 2026-01-09 DOI: 10.1016/j.compositesb.2026.113389

Zhibin Zhao , Yusen Zhang , Jianwu Zhou , Dong Li , Hui Cai , Nian Wang , Jingye Zhang , Yuanliang Xue , Haijun Jiang , Xin Lv , Zhengwei Yang

Quantifying impact damage in aircraft carbon fiber-reinforced composites is critical for ensuring structural safety. Ultrasonic C-scan is widely regarded as the primary method for detecting and characterizing impact-induced delamination due to its high precision, but its inspection time cost is relatively high. Ultrasonic infrared thermography is fast and convenient, but its inspection effectiveness is limited by thermal diffusion and noise, resulting in low signal-to-noise ratio images that are difficult to quantify. To overcome these limitations, this study proposes UIT-GAN, a novel cross-modal generative framework that incorporates a diffusion-based denoising mechanism to stabilize training under limited data. The model achieves accurate translation from low-resolution thermograms to high-fidelity C-scan-like images. Using CF/PEEK laminates, we collected 88 sets of paired experimental data and expanded the dataset to 880 samples via augmentation. Experimental results demonstrate that UIT-GAN generates images highly consistent with actual C-scans, achieving a structural similarity of up to 95 %. The proposed “generate-then-segment” strategy achieves a mean intersection-over-union of 63 % and a percentage area error below 12 %, outperforming mainstream models such as pix2pix, CUT, SRC, UNSB, and ASCo. In comparison with conventional direct segmentation of thermograms, this approach effectively overcomes limitations such as low SNR and blurred boundaries, and demonstrates superior performance in damage quantification accuracy, region integrity, and boundary smoothness. This study provides an innovative solution for rapid, non-destructive quantitative assessment of impact damage in aerospace composite materials.

量化飞机碳纤维增强复合材料的冲击损伤是保证结构安全的关键。超声c扫描由于其精度高，被广泛认为是检测和表征冲击诱发脱层的主要方法，但其检测时间成本相对较高。超声红外热成像快速方便，但其检测效果受到热扩散和噪声的限制，导致图像信噪比低，难以量化。为了克服这些限制，本研究提出了unit - gan，这是一种新的跨模态生成框架，它结合了基于扩散的去噪机制，以稳定有限数据下的训练。该模型实现了从低分辨率热像图到高保真c扫描样图像的精确转换。使用CF/PEEK层压板，我们收集了88组配对实验数据，并通过扩增将数据集扩展到880个样本。实验结果表明，ut - gan生成的图像与实际c扫描高度一致，结构相似性高达95%。提出的“生成-然后分割”策略实现了63%的平均交叉-过并率和12%以下的百分比面积误差，优于主流模型，如pix2pix， CUT， SRC， UNSB和ASCo。与传统的热图直接分割方法相比，该方法有效地克服了低信噪比和边界模糊等局限性，在损伤量化精度、区域完整性和边界平滑性方面表现出优越的性能。该研究为航空航天复合材料冲击损伤的快速、非破坏性定量评估提供了一种创新的解决方案。

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引用次数: 0

High-performance steel wire/hybrid fiber reinforced polymer bars: Design method, performance optimization and tensile constitutive model 高性能钢丝/混杂纤维增强聚合物棒材：设计方法、性能优化及拉伸本构模型

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-03-15 Epub Date: 2026-01-09 DOI: 10.1016/j.compositesb.2026.113398

Wei Ma , Danying Gao , Tao Zhang , Yajiang Guo , Lin Yang , Jiyu Tang

To overcome the limitations of existing hybrid fiber reinforced polymer (HFRP) bars in performance and application, this study proposed a novel design methodology for developing high-performance steel wire/hybrid fiber reinforced polymer (H-SHFRP) bars with enhanced tensile strength, modulus, and ductility. Meanwhile, a comprehensive database of target strength grades was established, enabling designers to directly select appropriate constituent materials, design parameters, and target strength grades according to the specific requirements of H-SHFRP reinforced concrete structures. To verify the effectiveness of the proposed method, the effects of C/G ratio, steel wire replacement rate, and fiber volume fraction on the tensile properties of H-SHFRP bars were investigated through experimental testing. The results showed that the addition of steel wire improved the tensile properties of H-SHFRP bars, and the elastic modulus, ductile deformation and sudden stress drop can be significantly optimized by adjusting the test parameters. Finally, a tensile stress-strain constitutive model for H-SHFRP bars considering C/G ratio, steel wire replacement rate, and fiber volume fraction was established. This model is suitable for analyzing and predicting the tensile damage process of single-fiber, hybrid-fiber, and steel/hybrid-fiber FRP bars. The proposed design methods, material databases, and constitutive models are conducive to the development and application of high-performance FRP bars in concrete structures.

为了克服现有混杂纤维增强聚合物（HFRP）钢筋在性能和应用上的局限性，本研究提出了一种新的设计方法，用于开发具有增强抗拉强度、模量和延展性的高性能钢丝/混杂纤维增强聚合物（H-SHFRP）钢筋。同时，建立了全面的目标强度等级数据库，设计人员可以根据H-SHFRP钢筋混凝土结构的具体要求，直接选择合适的构件材料、设计参数和目标强度等级。为验证该方法的有效性，通过试验研究了C/G比、钢丝置换率和纤维体积分数对H-SHFRP筋拉伸性能的影响。结果表明：钢丝的加入改善了H-SHFRP筋的拉伸性能，通过调整试验参数可以显著优化H-SHFRP筋的弹性模量、韧性变形和突然应力降。最后，建立了考虑C/G比、钢丝替换率和纤维体积分数的H-SHFRP筋拉伸应力-应变本构模型。该模型适用于分析和预测单纤维、混合纤维和钢/混合纤维FRP筋的拉伸损伤过程。提出的设计方法、材料数据库和本构模型有利于高性能FRP筋在混凝土结构中的发展和应用。

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引用次数: 0

Experimental and numerical investigation of bio-inspired CFRP structures with layer thickness gradients 具有层厚梯度的仿生CFRP结构的实验与数值研究

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-03-15 Epub Date: 2026-01-12 DOI: 10.1016/j.compositesb.2026.113409

Marcel Neubacher , Farida Touni , Kohei Yamada , Masaaki Nishikawa , Bodo Fiedler

Throughout evolutionary history, mineralised tissues have developed remarkable skeletal microstructures that combine exceptional damage tolerance with adaptation to challenging environmental conditions. These tissues typically feature composite architectures with spatially varying fibre orientations and layer thicknesses.

This study utilises the microstructure of deep-sea sponge spicules and the cuticle of the lobster Homarus americanus as bioinspiration. Sponge spicules, found at depths between 1100 m and 2100 m, consist of radially arranged layers of hydrated silicon dioxide. Their curvature adapts to ocean currents, and analyses reveal graded layer thickness from 0.6 µm to 10 µm. Thinner layers in tensile regions enhance tensile strength due to scaling relationship with layer thickness

h^{- 1 / 2}

, while thicker layers in compressive zones improve stability and reduce buckling. Unlike this microstructure, the cuticle of Homarus americanus comprises epicuticle, exocuticle, and endocuticle, with the latter two forming helicoidal fibre architecture. In the claws, exocuticular layers are thinner, facilitating energy absorption under impact, whereas thicker endocuticular layers provide structural stabilisation through increased stiffness.

Inspired by these biological systems, thin-ply carbon fibre reinforced polymer laminates were designed for out-of-plane loading conditions. A quasi-isotropic layup

(45°, 90°, -45°, 0°)

was chosen to reflect amorphous nature of hydrated silica. To mimic natural gradients, layers of varying thin-ply thickness were employed within thermally balanced laminate sequence. Layer configurations were initially optimised using finite element three-point bending simulations and subsequently validated experimentally.

The graded design approach resulted in improved flexural performance and reduced damage propagation under impact loading, demonstrating potential of bio-inspired layer thickness gradation for development of advanced composite structures.

在整个进化史中，矿化组织已经发展出非凡的骨骼微结构，结合了特殊的损伤耐受性和对具有挑战性的环境条件的适应。这些组织通常具有复合结构，具有空间变化的纤维取向和层厚度。本研究利用深海海绵针状体的微观结构和美洲大龙虾的角质层作为生物灵感。在1100米至2100米深度之间发现的海绵针状体，由水合二氧化硅的放射状排列层组成。它们的曲率适应洋流，分析显示渐变层厚度从0.6微米到10微米。拉伸区较薄的层与层厚h−1/2呈正比例关系，从而提高了抗拉强度，而压缩区较厚的层提高了稳定性，减少了屈曲。与这种微观结构不同，美洲Homarus americanus的角质层由表皮、外表皮和内表皮组成，后两者形成螺旋状纤维结构。在爪子中，表皮层较薄，有助于在冲击下吸收能量，而较厚的内膜层通过增加刚度来提供结构稳定性。受这些生物系统的启发，薄层碳纤维增强聚合物层压板被设计用于面外加载条件。选择45°，90°，-45°，0°的准各向同性铺层来反映水合二氧化硅的无定形性质。为了模拟自然梯度，在热平衡层压层序中采用了不同薄层厚度的层。首先，利用有限元三点弯曲模拟优化了层状结构，随后进行了实验验证。这种分级设计方法改善了材料的弯曲性能，减少了冲击载荷下的损伤传播，证明了仿生层厚分级在开发先进复合材料结构方面的潜力。

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引用次数: 0