【新文速递】2025年1月9日复合材料SCI期刊最新文章

 

今日更新：Composite Structures 2 篇，Composites Part A: Applied Science and Manufacturing 6 篇，Composites Part B: Engineering 5 篇，Composites Science and Technology 1 篇

Composite Structures

Enhancing ballistic performance: Effect of polyurea coating on backface deformation of UHMWPE laminates

Lei Wang, Jiahao Kong, Dongyang Chu, Yifan Wang, Tao Wang, Zhanli Liu

doi:10.1016/j.compstruct.2025.118846

增强弹道性能：聚脲涂层对超高分子量聚乙烯复合材料背面变形的影响

Backface deformation (BFD) is a critical factor in evaluating the ballistic performance of ultra-high molecular weight polyethylene (UHMWPE) and similar protective materials, as excessive BFD can cause blunt force trauma. This study systematically explores how polyurea coatings influence BFD in UHMWPE laminates. Through a series of ballistic tests under varying conditions of polyurea thickness coating position, and projectile velocity, we observed a significant reduction in backface deformation (BFD) with the application of polyurea coatings. Post-impact CT scans show the basic deformation pattern during the projectile penetration of the polyurea-coated UHMWPE laminate. Furthermore, a viscoelastic-plastic constitutive model for polyurea and a composite fabric plate model accounting for delamination were developed. The results of the finite element model (FEM) align well with the experimental findings, and demonstrate that the energy of the projectile during penetration is dissipated through shear fractures in the UHMWPE laminate and wave-like deformations at the edges of the polyurea coating on the backface. The study provides new insights for the design of advanced bulletproof structures.

背面变形（BFD）是评估超高分子量聚乙烯（UHMWPE）和类似防护材料的弹道性能的关键因素，因为过度的BFD会导致钝力损伤。本研究系统地探讨了聚脲涂层如何影响超高分子量聚乙烯层压板的BFD。通过一系列在不同的聚脲厚度、涂层位置和弹丸速度条件下的弹道试验，我们观察到聚脲涂层的应用显著降低了背面变形（BFD）。撞击后的CT扫描显示了聚氨酯涂层UHMWPE层压板在弹丸穿透过程中的基本变形模式。建立了考虑分层的聚脲粘弹塑性本构模型和复合织物板本构模型。有限元模型计算结果与实验结果吻合较好，表明弹体侵彻过程中的能量通过超高分子量聚乙烯层合材料的剪切断裂和背面聚脲涂层边缘的波状变形耗散。该研究为先进防弹结构的设计提供了新的思路。

Mass transport characteristic and biocompatibility of demand-guided structural biomaterials

Yang Zhao, Qianqian Wu, Linzhi Wu

doi:10.1016/j.compstruct.2025.118848

需求导向结构生物材料的质量传递特性和生物相容性

Structural biomaterials have garnered widespread attention for their potential applications in regenerative medicine, particularly in the repair of bone tissue defect repair. However, the absence of a personalized design often results in a mismatch between the structural biomaterials and the repaired tissue, thereby limiting the effectiveness of the repair. Hence, the demand-guided structural biomaterials for skull defect repair have been identified, with an emphasis on personalized design factor, mass transport characteristics and biocompatibility. Initially, the titanium alloy demand-guided structural biomaterials with different characteristics as body-centered cubic configuration are fabricated by additive manufacturing. The crystalline phase and element content percentage of fabricated specimen are observed by XRD patterns and EDS analysis. The permeability, serving as a marker for assessing mass transport capability, is evaluated using both the falling head method and computational fluid dynamics simulation. In generally, the permeability results, which can range from 0.41 × 10-8 m2 to 10.92 × 10-8 m2, demonstrate a strong correlation with bone. The cell assay substantiates that the demand-guided structural biomaterials exhibit commendable biocompatibility, encompassing both cell viability and osteogenic differentiation. Owing to their superior mass transport properties, cytocompatibility, and osteogenic differentiation capabilities, demand-guided structural biomaterials hold significant potential for the repair of skull defect repair.

结构生物材料因其在再生医学特别是骨组织缺损修复中的潜在应用而受到广泛关注。然而，缺乏个性化的设计往往会导致结构生物材料与修复组织之间的不匹配，从而限制了修复的有效性。因此，需求导向的颅骨缺损修复结构生物材料已经确定，重点是个性化设计因素，质量运输特性和生物相容性。首先，采用增材制造技术制备了具有体心立方构型等不同特征的钛合金需求导向结构生物材料。通过x射线衍射（XRD）和能谱分析（EDS）观察了制备试样的晶相和元素含量。渗透率作为评价质量输运能力的标志，采用降水头法和计算流体力学模拟对其进行了评价。总的来说，渗透性结果的范围在0.41 × 10-8 m2到10.92 × 10-8 m2之间，表明与骨骼有很强的相关性。细胞试验证实，需求导向结构生物材料表现出值得称赞的生物相容性，包括细胞活力和成骨分化。由于其优越的质量运输特性、细胞相容性和成骨分化能力，需求导向结构生物材料在颅骨缺损修复中具有巨大的潜力。

Composites Part A: Applied Science and Manufacturing

Charge design for carbon fibre sheet moulding compounds—Impact on morphology and mechanical performance

Henri Schwalm, Pascal Hubert

doi:10.1016/j.compositesa.2024.108695

 

碳纤维薄板成型复合材料的装料设计-对形貌和机械性能的影响

Compression moulded carbon fibre reinforced sheet moulding compounds aim to maximize the mechancial performance of discontinuous fibre composites, while maintaining low cycle times. The shape of the charge governs their in-mould flow behaviour, which is one of the most important factors influencing their mechanical performance. While high amounts of flow and the presence of weld lines have been identified as the major performance detractors, the practical implications of these finding on how charges should be designed have not yet been investigated in detail. The present study considers different charge configurations based on challenges that arise when balancing repeatable high performance and manufacturing efficiency in an industrial context. The influence of these configurations on the local internal microstructure is measured with micro-computed tomography and closely associated with the corresponding local mechanical performance measured using digital image correlation. While a charge closely resembling the part indeed yields the most reliable quasi-isotropic results, some in-mould flow aids in evacuating trapped gases and is in many scenarios preferable to piecing together charges from sheet moulding compound patches, thus introducing weld lines. Notably, an even charge coverage is important, to avoid local complex flow patterns, which highly distort the material and constitute significant weak spots.

压缩成型碳纤维增强板材成型化合物旨在最大限度地提高不连续纤维复合材料的机械性能，同时保持低循环时间。装料的形状决定了其模内流动行为，是影响其力学性能的重要因素之一。虽然高流量和焊缝的存在已被确定为主要的性能损害因素，但这些发现对如何设计装药的实际意义尚未进行详细研究。目前的研究考虑了不同的电荷配置，基于在工业环境中平衡可重复的高性能和制造效率时出现的挑战。这些结构对局部内部微观结构的影响是用微计算机断层扫描测量的，并与用数字图像相关测量的相应的局部力学性能密切相关。虽然与零件非常相似的装药确实产生了最可靠的准各向同性结果，但一些模内流动有助于排出被困气体，并且在许多情况下比将板材成型复合贴片中的装药拼凑在一起更可取，从而引入焊缝。值得注意的是，均匀的电荷覆盖是重要的，以避免局部复杂的流动模式，这高度扭曲了材料并构成了显著的弱点。

Analysis of the tensile behaviour of flax fibre bundles as a function of the loaded volume

Margot Chalard, Frédéric Bedel, Coralie Buffet, Adèle Hue, Alessia Melelli, Timm Weitkamp, Pierre D’arras, Alain Bourmaud, Christophe Baley

doi:10.1016/j.compositesa.2024.108704

亚麻纤维束的拉伸性能随载荷体积的变化分析

Addressing the mechanical behaviour of flax bundles is a key point when used as reinforcements in composite materials. To determine their mechanical properties, the bundle cross-sectional area must be correctly assessed and has been estimated here using three types of models: elliptical, circular or polygonal. The circular model shows the higher disparity with twice the polygonal standard deviation. Innovatively, 3D rendering of bundles were carried out using microtomographic acquisitions, highlighting their partially cohesive unidirectional composite structure. Then, to analyse the phenomenon involved in the characterisation of bundles, mechanical properties were determined from a threshold value (first damage detected) and expressed as a function of the loaded volume (depends on the bundle cross-section area and the gauge length). To consider the dispersion of the bundles cross-sections, these properties were also weighted using the cross-section distribution curve. The results show their dependence on the volume and morphology of the tested bundles.

研究亚麻束的力学性能是复合材料增强材料的关键。为了确定它们的力学性能，束的横截面积必须得到正确的评估，这里使用了三种类型的模型：椭圆、圆形或多边形。圆形模型显示出更高的视差，是多边形标准差的两倍。创新的是，使用显微层析成像进行束的三维渲染，突出了它们部分内聚的单向复合结构。然后，为了分析与束表征相关的现象，从阈值（首次检测到的损伤）确定机械性能，并将其表示为加载体积的函数（取决于束的横截面面积和规范长度）。为了考虑束截面的分散性，还使用截面分布曲线对这些性质进行加权。结果表明，它们与被测束的体积和形态有关。

Exploring the anisotropic damage behaviour during the scratching process of SiCf/SiC composites

Qihao Xu, Jinlong Wang, Yi-Qi Wang, Hang Gao

doi:10.1016/j.compositesa.2025.108717

 

探究SiCf/SiC复合材料划伤过程中的各向异性损伤行为

SiCf/SiC composites are ideally suited for demanding high-temperature applications, such as high thrust-weight ratio aeroengines, and accident-tolerant fuel claddings. However, their anisotropic damage behaviour causes the significant challenge in high-quality machining. To explore this difficulty, linear loading nanoindentation and scratch tests were conducted. The results indicated significant variations in mechanical property and damage resistance across different structural locations. The damage behaviour in fibre bundle region was observed to differ from matrix-rich region, depending on the fibre-related scratch direction ϕ. Except for ϕ = 0° and 90°, the two sides of scratch exhibited an asymmetric damage feature. At ϕ = 90°, the largest lateral damage was observed. Fibre-matrix interface debonding was crucial, accompanied by complex force fluctuations. Based on beam bending theory and fracture mechanics, a microstructure-based model was developed to explain the mechanisms of debonding and fibre fracture at different fibre orientations, showed consistency with the evaluated results.

SiCf/SiC复合材料非常适合要求苛刻的高温应用，例如高推重比航空发动机和耐事故燃料包层。然而，它们的各向异性损伤行为给高质量加工带来了重大挑战。为了探索这一难题，进行了线性加载纳米压痕和划痕试验。结果表明，在不同的结构位置，其力学性能和抗损伤能力存在显著差异。观察到纤维束区域的损伤行为不同于基质丰富的区域，这取决于纤维相关的划痕方向φ。除ϕ = 0°和90°外，划痕的两侧均呈现不对称损伤特征。在ϕ = 90°时，观察到最大的侧向损伤。纤维基质界面剥离是关键，伴随着复杂的力波动。基于梁弯曲理论和断裂力学，建立了基于微观结构的模型来解释纤维在不同取向下的脱粘和断裂机制，结果与评估结果一致。

Non-synchronous ductile and brittle removal mechanisms for conventional and ultrasonic vibration-assisted scratching of ceramic matrix composites

Wenzhao An, Qilin Li, Xiaoxing Gao, Bochuan Chen, Yang Luo, Weiwei Xu, Liyu Wang, Songmei Yuan

doi:10.1016/j.compositesa.2025.108718

陶瓷基复合材料常规和超声振动辅助刮擦的非同步韧性和脆性去除机制

Ceramic matrix composites (CMCs) are widely recognised as difficult-to-machine materials. The use of diamond abrasive tools combined with ultrasonic vibration offers unique benefits for precision machining. Understanding the differences in material removal mechanisms between ultrasonic vibration-assisted scratching (UAS) and conventional scratching (CS) is crucial for achieving efficient, accurate machining of high-value workpieces. Herein, variable-depth CS and UAS tests were performed, revealing for the first time two brittle removal mechanisms in CMCs: fibre-bending fracture from non-synchronous removal in CS and cyclic indentation-hammering-crack extension in UAS. Further, the non-impulse (CS) and impulse (UAS) force models are established for ductile and brittle removal, respectively. These models were successfully validated through experimental scratching-force data. Results suggest that material removal behavior is primarily influenced by the type of fiber bending fracture and crack extension tip shielding.

陶瓷基复合材料（cmc）被广泛认为是难以加工的材料。金刚石磨具结合超声波振动的使用为精密加工提供了独特的好处。了解超声振动辅助刮擦（UAS）和常规刮擦（CS）之间材料去除机制的差异对于实现高价值工件的高效、精确加工至关重要。在此，进行了变深度CS和UAS试验，首次揭示了cmc中的两种脆性去除机制：CS中的非同步去除纤维弯曲断裂和UAS中的循环压痕-锤击-裂纹扩展。此外，建立了非冲击力（CS）和冲击力（UAS）模型，分别用于塑性和脆性去除。通过实验刮擦力数据对模型进行了验证。结果表明，材料的去除行为主要受纤维弯曲断裂类型和裂纹扩展尖端屏蔽的影响。

Non-linear finite element modelling of damage within web-flange junctions of pultruded GFRP bridge decking

M. Poulton, W.M. Sebastian, J.T. Mottram, L. Kawashita

doi:10.1016/j.compositesa.2024.108666

拉挤玻璃钢桥面板腹板翼缘连接处损伤的非线性有限元模拟

The web-flange junctions (WFJs) of glass fibre-reinforced polymer (GFRP) bridge decks transmit significant local moment-shear (M−V) combinations due to both concentrated tyre and global vehicle load effects. The WFJs also feature significant fibre mat misalignments that randomly amplify the local stress demand at the fibre-to-resin interfaces. To predict the load response and progressive damage in such WFJs, this paper presents a non-linear finite element (FE) analysis using ANSYS® software that features high-fidelity geometric representations of the mat misalignments in the as-manufactured WFJs. Cohesive zone modelling and the Hashin failure criteria are used to predict the initiation and progressive growth of delamination and transverse tensile cracks, respectively, when loaded under different M−V combinations. The applied loads and damage locations at first fracture are both reliably predicted, the former to within 10 % of physical test results using the flange cantilever test method. The FE analysis also predicts that transverse cracks in the roving core are the catalyst for ’softening’ of the nearby interface elements. It is seen that a ±30 % change in the transverse tensile strength of the roving core leads to a proportional ±13 % change in first fracture load. The authors recommend that the proposed FE modelling methodology can be used both to design new pultruded profiles and to make assessments of existing GFRP bridge decks subjected to traffic loads.

由于集中的轮胎和整体车辆荷载效应，玻璃纤维增强聚合物（GFRP）桥面的腹板法兰连接处（WFJs）传递了显著的局部弯矩-剪切（M - V）组合。wfj还具有显著的纤维垫错位，随机放大纤维-树脂界面的局部应力需求。为了预测此类wfj的载荷响应和逐渐损伤，本文使用ANSYS®软件进行了非线性有限元（FE）分析，该软件具有在制造的wfj中垫片错位的高保真几何表示。黏结区模型和Hashin破坏准则分别用于预测不同M - V组合加载时分层和横向拉伸裂纹的起裂和逐渐扩展。应用法兰悬臂梁试验方法，对加载载荷和首次断裂时的损伤位置进行了可靠的预测，前者与物理试验结果的预测误差在10 %以内。有限元分析还预测粗纱芯中的横向裂纹是附近界面元素“软化”的催化剂。可见，粗纱岩心横向抗拉强度变化 ±30 %，导致首次断裂载荷成比例变化 ±13 %。作者建议，所提出的有限元建模方法既可以用于设计新的拉挤型材，也可以用于评估现有的玻璃钢桥面受到交通荷载的影响。

Long-term performance and deterioration mechanism of novel hydrophobic coated fiber reinforced composite in marine environment

Kexuan Li, Ao Zhou, Tiejun Liu, Dujian Zou, Zechuan Yu

doi:10.1016/j.compositesa.2025.108716

 

新型疏水涂层纤维增强复合材料在海洋环境中的长期性能及劣化机理

Hydrophobic modification is an innovative strategy to address the deterioration of composite caused by water absorption in marine environment. This study develops a novel hydrophobic coated composite, whose long-term tensile strength is 28.9 % higher than that of pristine composite after immersing in seawater for 90 days. The underlying deterioration mechanism of hydrophobic coated composite has been revealed via molecular dynamics simulation. Fluorinated Si-O-Si groups and C-F bonds promote the physical hydrogen bonding network and chemical covalent bonds between fiber and hydrophobic coating, enhancing intermolecular interactions and bonding strength. Polyfluorinated modification weakens the interaction with seawater, improving the resistance of hydrophobic coated composite in marine. Bridging Na+ ions form topological structures in hydrophobic system, delaying the separation of fibers from the resin and protecting the integrity of composite in seawater. This work reveals the deterioration mechanism of hydrophobic coated composite, providing strategy support for inspiring durable composite in marine engineering.

疏水改性是解决海洋环境中复合材料吸水性能恶化的一种创新策略。本研究开发了一种新型疏水涂层复合材料，在海水中浸泡90 天后，其长期抗拉强度比原始复合材料高28.9 %。通过分子动力学模拟揭示了疏水包覆复合材料的劣化机理。氟化的Si-O-Si基团和C-F键促进了纤维与疏水涂层之间的物理氢键网络和化学共价键，增强了分子间的相互作用和键强度。多氟改性降低了涂层与海水的相互作用，提高了涂层在海洋中的耐水性。桥接Na+离子在疏水体系中形成拓扑结构，延缓纤维与树脂的分离，保护复合材料在海水中的完整性。本研究揭示了疏水涂层复合材料的劣化机理，为激发海洋工程中耐用复合材料提供了策略支持。

Composites Part B: Engineering

Multiscale characterization of effective thermal properties of graphene/polymer composite aerogels

D.-T. Le, V.-H. Nguyen, S. Mahouche-Chergui, B. Carbonnier, D. Grande, S. Naili

doi:10.1016/j.compositesb.2024.112106

石墨烯/聚合物复合气凝胶有效热性能的多尺度表征

This work involves the characterization of effective thermal conductivity of polymer aerogel reinforced by graphene and graphene oxide elaborated by replacing the liquid phase with a gas phase through an environmentally friendly freeze-drying process. For characterizing the developed aerogel, multiscale geometrical configurations were constructed based on the experimental characterizations of the prepared aerogels. Following that, a homogenization procedure was applied, moving from smaller to larger scales. At the nanoscale, the Milton method was used, while at the micro- and macroscales, the asymptotic method was employed in combination with the finite element method. Problems posed on a domain called the representative unit cell were formulated at both micro- and macroscales, and their resolution using the finite element method allows the calculation of characteristic functions of the problems, thereby obtaining effective thermal conductivity of the material. To the best of our knowledge, no studies have been reported in the literature on the multiscale characterization of the effective properties of polymer aerogels, hence the motivation for this work. To address this gap, a novel numerical approach has been developed to investigate aerogel properties across multiple scales. The multiscale approaches have revealed the influence of various microstructural characteristics on the effective thermal conductivity properties of the hybrid aerogel. The results show that graphene and graphene oxide nanoinclusions do not significantly affect the thermal conductivity, but they do significantly improve the mechanical properties of the polymer-based aerogel. Furthermore, this study has also demonstrated that aerogels with superinsulating properties can be obtained by reducing the pore size to the nanometer scale and lowering the gas pressure to below 0.01 atm.

这项工作包括表征由石墨烯和氧化石墨烯增强的聚合物气凝胶的有效导热性，通过环保的冷冻干燥过程将液相替换为气相。为了表征所制备的气凝胶，在实验表征的基础上构建了多尺度几何构型。随后，采用均质化程序，从较小的规模转移到较大的规模。在纳米尺度上采用弥尔顿法，在微观和宏观尺度上采用渐近法与有限元法相结合的方法。在一个称为代表性单元胞的领域上提出的问题在微观和宏观尺度上都是公式化的，它们的解决使用有限元方法允许计算问题的特征函数，从而获得材料的有效导热系数。据我们所知，文献中没有关于聚合物气凝胶有效性质的多尺度表征的研究报道，因此这项工作的动机。为了解决这一差距，研究人员开发了一种新的数值方法来研究气凝胶在多个尺度上的特性。多尺度方法揭示了各种微观结构特征对杂化气凝胶有效导热性能的影响。结果表明，石墨烯和氧化石墨烯纳米包体对聚合物基气凝胶的导热性能没有显著影响，但能显著改善聚合物基气凝胶的力学性能。此外，本研究还表明，将孔径减小到纳米级，将气体压力降低到0.01 atm以下，可以获得具有超绝缘性能的气凝胶。

Novel approach for crack detections and rapid repairment methods in cement-based self-heating composites for smart infrastructures

Daeik Jang, Jihoon Park, Sungsik Choi, Jinho Bang, Junhyeok Choi, Jonghyeok Kim, Beomjoo Yang, Haemin Jeon

doi:10.1016/j.compositesb.2025.112126

智能基础设施用水泥基自热复合材料裂缝检测与快速修复新方法

Cement-based self-heating composites have emerged as a promising solution for efficient and intelligent road de-icing systems. However, these composites are susceptible to crack formation, which can significantly impair their self-heating performance. To address this issue, the present study introduces a novel approach for crack detection and rapid repair in self-heating composites. Sustainable cement-based repair composites including calcium aluminate cement (CAC) and calcium sulfoaluminate (CSA) cement were proposed, and the self-heating performance of both the original and repair composites was assessed prior to crack formation. The crack detection process utilized piezoresistive sensing, achieving a stress sensitivity of 0.96 %/MPa, complemented by deep learning-based image analysis to monitor and provide detailed crack information. The crack monitoring techniques successfully detected in-situ crack formation and provided detailed information on the cracks. Upon crack development, rapid repair methods were applied, and the self-heating performance of the repaired composites was assessed. Regardless of crack width (0.5, 1.0, 2.0, and 3.0 mm), the repaired composites showed a surface temperature of approximately 35 °C under 20V of input voltage. Experimental results demonstrated that the proposed repair methods are both rapid and effective in restoring the self-heating functionality of the composites. Consequently, this study offers valuable insights into crack monitoring and the development of repairable self-heating composites for smart infrastructure applications.

水泥基自热复合材料已成为高效智能道路除冰系统的一种有前途的解决方案。然而，这些复合材料容易产生裂纹，从而严重影响其自热性能。为了解决这一问题，本研究提出了一种新的自热复合材料裂纹检测和快速修复方法。提出了包括铝酸钙水泥（CAC）和硫铝酸钙水泥（CSA）在内的可持续水泥基修复复合材料，并在裂缝形成前评估了原始和修复复合材料的自热性能。裂纹检测过程采用压阻传感，应力灵敏度达到0.96% /MPa，辅以基于深度学习的图像分析，以监测并提供详细的裂纹信息。裂缝监测技术成功地发现了裂缝的原位形成，并提供了裂缝的详细信息。针对裂纹的发展，采用快速修复方法，对修复后的复合材料的自热性能进行了评价。无论裂纹宽度（0.5、1.0、2.0和3.0 mm）如何，在20V输入电压下，修复后的复合材料表面温度均接近35℃。实验结果表明，所提出的修复方法能够快速有效地恢复复合材料的自热功能。因此，这项研究为裂缝监测和智能基础设施应用的可修复自热复合材料的开发提供了有价值的见解。

Thermoelastic Stresses and Delamination in Composite Bicomponent Fibers: Experimental Study

Yanyue Wang, Behnam Pourdeyhimi, Alexander L. Yarin

doi:10.1016/j.compositesb.2025.112129

复合双组分纤维的热弹性应力和分层：实验研究

The critical stresses of polymer pairs relevant in the context of composite bicomponent fibers are established independently in experiments employing the blister test used to measure the adhesion energy of thermally-bonded polymer pairs and the critical delamination stresses. These data is used as the input physical parameters in the theoretical and numerical investigations of the stress fields and potential delamination (de-bonding) at the polymer-polymer interfaces in the composite bicomponent fibers.

在复合双组分纤维的背景下，聚合物对的临界应力是在使用泡罩测试来测量热粘合聚合物对的粘附能和临界分层应力的实验中独立建立的。这些数据被用作双组分复合纤维中聚合物-聚合物界面应力场和潜在分层（脱键）的理论和数值研究的输入物理参数。

Additive manufacturing of multifunctional epoxy adhesives with self-sensing piezoresistive and thermoresistive capabilities

R. Lima, P. Costa, J. Nunes-Pereira, A.P. Silva, C.R. Tubio, S. Lanceros-Mendez

doi:10.1016/j.compositesb.2025.112130

 

具有自感压阻和热阻能力的多功能环氧粘合剂的增材制造

Epoxy resin composites are a class of materials that are widely used in various industries, including automotive, marine, and aerospace. They serve as adhesives to improve the mechanical strength of structures or to replace traditional joining methods. This work evaluates the adhesive performance of a modified epoxy resin, emphasizing its application for bonded joints with piezoresistive and thermoresistive sensing capabilities for real-time structural monitoring. A novel processing method has been developed that utilizes acetone to disperse conductive carbon nanotubes, thereby controlling the viscosity of the solution for screen-printing applications. This method enhances print definition and device design while maintaining the feasibility of large-area applications for industrial scale-up and minimizing waste during the process. The approach demonstrated high adhesion properties and the capability to detect bending deformation and temperature variations in screen-printed adhesive bonded joints, achieving sensitivities up to GF≈ 30 and  (%.ºC-1) for piezoresistive and thermoresistive sensing, respectively. Finally, a successful proof-of-concept was developed using glass fiber adherents bonded with the functional adhesive, enabling real-time measurement of bending.

环氧树脂复合材料是一类广泛应用于各种行业的材料，包括汽车、船舶和航空航天。它们可以作为粘合剂来提高结构的机械强度或取代传统的连接方法。 本研究评估了一种改性环氧树脂的粘合性能，强调了其在具有压阻和热阻传感能力的粘合接头中的应用，用于实时结构监测。一种利用丙酮分散导电碳纳米管，从而控制丝网印刷溶液粘度的新型加工方法已经被开发出来。该方法增强了打印清晰度和设备设计，同时保持大面积应用的可行性，以实现工业规模扩大，并在此过程中最大限度地减少浪费。该方法具有很高的粘附性能，能够检测丝网印刷粘合剂粘合接头的弯曲变形和温度变化，压阻和热阻传感的灵敏度分别高达GF≈30和（%.ºC-1）。最后，使用与功能粘合剂粘合的玻璃纤维粘合剂进行了成功的概念验证，实现了弯曲的实时测量。

High-Capacity Ni-Rich Composite Cathodes Having Chemically Fused Interface with Li3InCl6 Electrolyte Towards Low-Pressure Operating All-Solid-State Li-Ion Batteries

Hao-Wen Liu, Hsi Chen, Shiki Thi, Pei-Jane Yu, Jeng-Lung Chen, Chih-Wen Pao, Po-Ya Chang, Shu-Chih Haw, Yen-Fa Liao, Yu-Cheng Shao, Gung-Chian Yin, Yen-Fang Song, Senthil-Kumar Parthasarathi, Yu-Ting Weng, Nae-Lih Wu

doi:10.1016/j.compositesb.2025.112133

 

面向低压全固态锂离子电池的具有Li3InCl6电解质化学熔合界面的高容量富镍复合阴极

The interface between solid electrolyte (SE) and cathode active material in all-solid-state Li-ion batteries (ASSLIBs) is vulnerable to debonding during charge-discharge because of the different chemo-mechanical responses of the two components. Maintaining its close contact, vital to long-term cycle stability, currently relies mainly on applying extraordinary stacking pressures, which hinders practical applications of ASSLIBs. We herein report the development of free-standing-type composite cathodes containing Ni-rich Li(Ni, Co, Mn)O2 (NCM; Ni stoichiometries ≥0.83) active materials and Li3InCl6 (LIC) SE with chemically fused robust interfaces that enable long-term cycle stability under a stacking pressure as low as nearly 2 MPa. The strong interface is realized via a novel in-situ recrystallization (ISR) process of LIC, which not only enhances close contact between the two solid components but also induces a chemically bonded interface, as revealed by synchrotron X-ray analyses. The bonded interface, while maintaining Li ion diffusion, exhibits extraordinary mechanical robustness against interfacial debonding even under low operating stacking pressures. A free-standing composite cathode containing LiNi0.88Co0.06Mn0.05Al0.01O2 (NCM88) and LIC, having a high specific capacity of ∼200 mAh g-1, is demonstrated to sustain 1500 charge-discharge cycles under ∼2MPa. This work points to the new strategy of chemically fused interface for achieving prolonged cycle stability of ASSLIBs under low stacking pressures.

在全固态锂离子电池（asslib）中，固体电解质（SE）与正极活性物质之间的界面在充放电过程中容易发生脱粘，这是因为两者的化学力学响应不同。保持其紧密接触对长期循环稳定性至关重要，目前主要依赖于施加异常的堆叠压力，这阻碍了asslib的实际应用。本文报道了含富镍Li(Ni, Co, Mn)O2 (NCM；Ni化学统计量≥0.83)的活性材料和Li3InCl6 (LIC) SE具有化学熔融坚固的界面，在低至近2 MPa的堆叠压力下能够实现长期循环稳定性。通过同步加速器x射线分析发现，这种强界面是通过一种新型的原位再结晶（ISR）工艺实现的，该工艺不仅增强了两种固体组分之间的紧密接触，而且产生了化学键结界面。在保持Li离子扩散的同时，即使在低操作堆积压力下，键合界面也表现出非凡的抗界面脱粘的机械稳健性。一种含有lini0.88 co0.06 mn0.05 al0.010 o2 （NCM88）和LIC的独立复合阴极，具有高达200 mAh g-1的高比容量，在~ 2MPa下可维持1500次充放电循环。本研究为实现asslib在低堆积压力下的长周期稳定性提供了新的化学熔融界面策略。

Composites Science and Technology

A constitutive model for carbon fabric-reinforced shape memory polymer composites based on Eshelby’s inclusion theorem

Jiajun Chen, Xiuqi Zhou, Chen Du, Qinghu Wang, Xiongqi Peng

doi:10.1016/j.compscitech.2025.111042

 

基于Eshelby包含定理的碳纤维增强形状记忆聚合物复合材料本构模型

This paper presents an expression for the effective elastic moduli of carbon woven fabric-reinforced shape memory polymer composites (SMPCs) based on a revised Eshelby’s inclusion theorem, followed by the development of an empirical constitutive model that incorporates storage strain. The model’s effectiveness is verified through thermomechanical and shape memory experiments on SMPCs with varying fiber volume fractions. Furthermore, several important experimental phenomena are observed. Firstly, the glass transition temperature of the SMPCs shifts to a higher value compared to the matrix. Secondly, SMPCs exhibit an initial expansion phase followed by contraction during the cooling process. Thirdly, while the shape fixation ratio of the SMPCs decreases, their shape recovery ratio remains higher than that of the matrix. The mechanisms behind these experimental phenomena are investigated within the proposed model, offering deeper insights into the behavior of SMPCs.

提出了基于修正Eshelby包含定理的碳编织物增强形状记忆聚合物复合材料（SMPCs）有效弹性模量表达式，并建立了考虑存储应变的经验本构模型。通过不同纤维体积分数的smpc的热力学和形状记忆实验，验证了该模型的有效性。此外，还观察到几个重要的实验现象。首先，smpc的玻璃化转变温度比基体高；其次，smpc在冷却过程中表现为初始膨胀阶段，随后是收缩阶段。smpc的形状固定率虽然降低，但形状恢复率仍高于基体。这些实验现象背后的机制在提出的模型中进行了研究，为smpc的行为提供了更深入的见解。