【新文速递】2025年3月25日复合材料SCI期刊最新文章_ACT_Mechanical_Fluent

【新文速递】2025年3月11日复合材料SCI期刊最新文章

今日更新：Composite Structures 4 篇，Composites Part B: Engineering 13 篇，Composites Science and Technology 3 篇Composite StructuresAdaptive 3D multi-patch isogeometric analysis for orthotropic solidLin Wang, Tiantang Yu, Weihua Fangdoi:10.1016/j.compstruct.2025.119028正交各向异性固体自适应三维多块等距分析This paper presents an adaptive multi-patch isogeometric analysis method with truncated hierarchical NURBS (TH-NURBS) for three-dimensional orthotropic elasticity. TH-NURBS inherit all excellent advantages of truncated hierarchical B-splines (THB-splines) and can achieve exact modeling of arbitrary complex geometry. For accurate description of complex geometry in practical engineering, multi-patch technique is introduced into isogeometric analysis, utilizing Nitsche’s method for patch coupling. In order to establish the adaptive algorithm framework, a recovery-based error estimator is presented based on TH-NURBS. The method is applied to several 3D orthotropic examples with ABAQUS solutions validating its accuracy. We also compare the computation efficiency with that obtained by uniform refinement method to show more efficient performance of the proposed adaptive method.提出了一种基于截断层次NURBS （TH-NURBS）的三维正交各向异性弹性自适应多块等几何分析方法。TH-NURBS继承了截断层次b样条（thb样条）的所有优点，可以实现任意复杂几何的精确建模。为了在实际工程中精确描述复杂的几何形状，将多补丁技术引入等高几何分析，利用Nitsche的补丁耦合方法。为了建立自适应算法框架，提出了一种基于TH-NURBS的恢复误差估计器。用ABAQUS解对几个三维正交各向异性算例进行了验证。并将该方法的计算效率与均匀细化方法的计算效率进行了比较。Bending damage of novel UV-CGFR composites for pipeline rehabilitation: Experimental characterization and numerical simulationYangyang Xia, Chao Zhang, Cuixia Wang, Jing Wang, Xinxin Sang, Peng Zhao, Hongyuan Fangdoi:10.1016/j.compstruct.2025.119065新型UV-CGFR管道修复复合材料的弯曲损伤：实验表征与数值模拟In this paper, a finite element numerical model of the bending damage of ultraviolet-cured glass fiber reinforced (UV-CGFR) composites was developed based on the results of the three-point bending test and X-ray tomography (Micro-CT), as well as infrared thermography (IRT) and other microscopic and macroscopic characterization tests. The numerical model, incorporating the three-dimensional Hashin failure criterion via the VUMAT subroutine, was established to predict the bending failure process and damage energy of UV-CGFR composites from the perspectives of fracture damage and energy dissipation. The effects of curing time, UV irradiation intensity, and loading rate on the bending properties and bending failure mechanism of UV-CGFR composites were systematically investigated. The primary failure modes observed were resin compression-tensile fractures, fiber tensile fractures, interlaminar debonding, and delamination. The bending strength and bending modulus of UV-CGFR composites increase and decrease with the increase of curing time and irradiation intensity; the bending strength increases with the loading rate, and the bending modulus is less affected by the loading rate. The temperature rise effect generated by fiber tensile fractures and interlaminar debonding was identified as a key factor contributing to the enhancement of bending strength. The temperature increase became more pronounced with higher loading rates, reaching a maximum rise of 5.2℃. Furthermore, the feasibility of UV-CGFR composites for pipeline repair was validated through pipe ring bending tests. The results show that the bending damage behaviour of UV-CGFR composites aligns well with real-world engineering applications, and the UV-CGFR composite lining repair significantly enhanced the pipeline’s load-bearing properties.本文基于三点弯曲试验和x射线断层扫描（Micro-CT）、红外热像仪（IRT）等细观和宏观表征试验结果，建立了紫外固化玻璃纤维增强（UV-CGFR）复合材料弯曲损伤的有限元数值模型。通过VUMAT子程序建立三维Hashin破坏准则的数值模型，从断裂损伤和能量耗散的角度预测UV-CGFR复合材料的弯曲破坏过程和损伤能量。系统研究了固化时间、UV辐照强度和加载速率对UV- cgfr复合材料弯曲性能和弯曲破坏机理的影响。观察到的主要破坏模式是树脂压缩-拉伸断裂、纤维拉伸断裂、层间脱粘和分层。UV-CGFR复合材料的弯曲强度和弯曲模量随固化时间和辐照强度的增加而增大和减小；弯曲强度随加载速率的增大而增大，弯曲模量受加载速率的影响较小。纤维拉伸断裂和层间脱粘产生的温升效应是提高抗弯强度的关键因素。随着加载速率的增加，升温幅度更大，最大升温幅度为5.2℃。通过管道环弯曲试验，验证了UV-CGFR复合材料用于管道修复的可行性。结果表明，UV-CGFR复合材料的弯曲损伤行为与实际工程应用非常吻合，UV-CGFR复合材料衬里修复显著提高了管道的承载性能。Theoretical and numerical study of crashworthiness of asymmetric gradient-hierarchical bi-hexagonal tubesQuanping Fu, Xiaolin Deng, Shen Xudoi:10.1016/j.compstruct.2025.119033非对称梯度分层双六角管耐撞性的理论与数值研究Previous studies have demonstrated that multi-cell bi-tubular tubes exhibit superior energy absorption capacity when compared to multi-cell tubes. In order to further enhance the energy absorption capacity of multi-cell bi-tubular tubes, this paper proposes an asymmetric gradient hierarchical bi-hexagonal tube (AGBT), which draws inspiration from the microstructure of the impact region of shrimp chelipeds and asymmetrical tree-like fractal structures. The results show that, under equal wall thickness conditions, the specific energy absorption and crushing force efficiency of the proposed 3rd order asymmetric gradient hierarchical bi-hexagonal tube (AGBT-3) are respectively 1.82 and 1.47 times higher than those of the conventional bi-hexagonal tube. Furthermore, under equal mass conditions, the specific energy absorption and crushing force efficiency of AGBT-3 are enhanced by up to 21% and 27%, respectively, in comparison to 0th order asymmetric gradient hierarchical bi-hexagonal tube (AGBT-0). These findings establish a clear advantage of the proposed AGBT-3 over AGBT-0 in terms of crashworthiness. Additionally, this study also conducts a theoretical prediction of the mean crushing force of the proposed AGBT, based on the simplified super folding element theory, and observes a good agreement between the theoretical prediction and numerical results. The outcomes of this study will serve as a valuable reference for the design and optimization of novel lightweight thin-walled energy-absorbing structures.先前的研究表明，与多细胞双管相比，多细胞双管具有优越的能量吸收能力。为了进一步提高多细胞双管的吸能能力，本文从虾螯足撞击区域的微观结构和不对称树状分形结构中汲取灵感，提出了一种不对称梯度分层双六边形管（AGBT）。结果表明，在等壁厚条件下，所提出的三阶梯度分层双六角管（AGBT-3）的比能吸收和破碎力效率分别是常规双六角管的1.82倍和1.47倍。此外，在同等质量条件下，AGBT-3的比能吸收和破碎力效率分别比0阶不对称梯度分层双六角形管（AGBT-0）提高了21%和27%。这些发现确定了拟议的AGBT-3在耐撞性方面优于AGBT-0的明显优势。此外，本文还基于简化的超折叠单元理论对所提出的AGBT的平均破碎力进行了理论预测，理论预测结果与数值结果吻合较好。研究结果将为新型轻量化薄壁吸能结构的设计和优化提供有价值的参考。Physics-informed model order reduction for laminated composites: A Grassmann manifold approachAbhilash Sreekumar, Swarup K. Barmandoi:10.1016/j.compstruct.2025.119035 层压复合材料的物理信息模型降阶：格拉斯曼流形方法This work presents a novel approach to parametric Model Order Reduction for fiber-reinforced laminated composites using First-order Shear Deformation Theory. Hierarchical Proper Orthogonal Decomposition creates local reduced bases for varying layer counts and fiber orientations. To interpolate between these POD subspaces of unequal dimensions, Schubert Variety-inspired Grassmann interpolation with Inverse Distance Weighting is employed. Adaptive grid sampling, incorporating physics-informed and Riemannian distance-driven methods, optimizes accuracy-cost tradeoffs. The methodology is validated through the multi-objective optimization of a C-cut composite plate, achieving significant computational efficiency while maintaining accuracy. This work highlights advancements in parametric Model Order Reduction for composite structures, with applications in material design and structural analysis.本文提出了一种利用一阶剪切变形理论进行纤维增强层合复合材料参数化模型降阶的新方法。层次固有正交分解为不同的层数和纤维方向创建了局部简化基。为了在这些不等维的POD子空间之间进行插值，采用了具有逆距离加权的Schubert变体启发的Grassmann插值。自适应网格采样，结合物理信息和黎曼距离驱动的方法，优化了精度和成本的权衡。通过c型切割复合材料板的多目标优化验证了该方法，在保持精度的同时获得了显著的计算效率。这项工作强调了复合材料结构参数化模型降阶的进展，以及在材料设计和结构分析中的应用。Composites Part B: EngineeringSynergy between nano SiO2-modified SAP and RHA in cement pastes: Shrinkage, microstructure, and strengthDongbing Jiang, Xiangguo Li, Changjiao Li, Yang Lv, Hui Rong, Deqiang Zhao, Zhengyu Yu, Konstantin Sobolev, Piqi Zhao, Xin Chengdoi:10.1016/j.compositesb.2025.112368纳米sio2改性SAP和RHA在水泥浆中的协同作用：收缩、微观结构和强度The application of a single internal curing material is incapable of effectively balancing shrinkage inhibition and strength development. This paper investigated the effect of nano SiO2-modified superabsorbent polymer (SAP-n) synergized with rice husk ash (RHA) on the shrinkage and mechanical properties of cement pastes. The water desorption process of the SAP-n/RHA composite within cement pastes was characterized using 1H NMR, isothermal calorimetry, and internal relative humidity. Moreover, the hydration kinetics and microstructure of internally cured pastes were revealed. The results demonstrated that the addition of RHA reduced the amount of water released from hybrid system before the final set, and accelerated the desorption rate of SAP afterward, effectively mitigating self-desiccation. A “three-stage” gradient water release model of SAP-n/RHA composite driven by osmotic pressure and humidity differences was proposed. The porous RHA was uniformly distributed in the matrix, especially around the SAP, contributing to internal curing at later ages while providing extra silica to repair voids and densify the pore structure. Compared to pastes containing commercial SAP, the 91-day dry shrinkage of specimens with 0.2 wt% SAP-n and 3.6 wt% RHA was reduced by 16.1% without compromising autogenous shrinkage inhibition efficiency, and the 28-day strength was increased by 20.6%.单一内固化材料的应用不能有效地平衡收缩抑制和强度发展。研究了纳米sio2改性高吸水聚合物（SAP-n）与稻壳灰（RHA）协同作用对水泥浆收缩性能和力学性能的影响。采用1H NMR、等温量热法和内部相对湿度对SAP-n/RHA复合材料在水泥浆体中的解吸过程进行了表征。此外，还揭示了内固化膏体的水化动力学和微观结构。结果表明，RHA的加入减少了混合体系终凝前的放水量，并加快了后期SAP的解吸速度，有效缓解了自干性。提出了渗透压和湿度差异驱动的SAP-n/RHA复合材料“三阶段”梯度放水模型。多孔RHA均匀分布在基体中，特别是SAP周围，有助于后期的内部固化，同时提供额外的二氧化硅来修复空隙并使孔隙结构致密化。与含有商用SAP的膏体相比，添加0.2 wt% SAP-n和3.6 wt% RHA的膏体在不影响自收缩抑制效率的情况下，91天干收缩率降低了16.1%，28天强度提高了20.6%。The synergistic regulation of micro sequence interface and macro bionic structure for superior microwave absorption performanceYunfeng Bao, Wenrui Wang, Xiaoqiang Qi, Siyao Guo, Yu Liu, Zhiqing Jia, Zuquan Jindoi:10.1016/j.compositesb.2025.112380 微观序列界面与宏观仿生结构协同调节，获得优异的微波吸收性能Micro-interface control and macro-structure design are crucial factors in achieving outstanding electromagnetic wave absorption (EMA) absorbers. However, it is still a challenge to obtain efficient EMA materials to satisfy practical applications through the synergistic regulation of the two. Herein, unique sequential interface engineering is proposed to ingeniously customize a series of FeCo nanochains (FC NCs) with various particle interface self-assembly combination modes, including face-to-face, corner-to-corner, and squeeze-to-squeeze. The dipole polarization, interfacial polarization, and magnetic coupling strength were enhanced to realize dielectric-magnetic synergies coupled with Ti3C2Tx MXene for exceptional EMA performance. The optimized squeeze-to-squeeze-shaped FeCo Nanochains/Ti3C2Tx MXene (FC3/MXene) exhibits the minimum reflection loss (RL_min) value of −60.95 dB at 1.897 mm and the reflection loss (RL) value of −51.46 dB at an ultralow thickness of 1.143 mm (The EMA efficiency exceeds 99.999%). Additionally, a bionic periodic structure inspired by the sea urchin shell was designed based on the high-performance absorber FC3/MXene, achieving the impressive value of −64.48 dB and a whole absorption band covering 2−18 GHz, thanks to its isotropic structure and high porosity. Furthermore, in radar cross-section (RCS) simulations, FC3/MXene absorbers effectively reduce the radar detection distance of an unmanned aerial vehicle (UAV), demonstrating excellent stealth characteristics. Looking ahead, this work not only achieves strong RL intensity at ultralow thickness through sequential interface engineering but also obtains the super wide absorption band by bionic periodic structure design, opening new possibilities for diverse advanced technological applications.微界面控制和宏观结构设计是制造优异电磁波吸收器的关键因素。然而，通过两者的协同调节，获得满足实际应用的高效EMA材料仍然是一个挑战。本文提出了独特的顺序界面工程，巧妙地定制了一系列具有不同粒子界面自组装组合模式的FeCo纳米链（FC nc），包括面对面、角对角和挤压对挤压。增强了偶极极化、界面极化和磁耦合强度，实现了与Ti3C2Tx MXene的介电-磁协同作用，获得了优异的EMA性能。优化后的挤压-挤压型FeCo纳米链/Ti3C2Tx MXene （FC3/MXene）具有最小的反射损耗（RL_min）在1.897 mm处，反射损耗（RL）值为−60.95 dB，在1.143 mm的超低厚度处，反射损耗（RL）值为−51.46 dB （EMA效率超过99.999%）。此外，基于高性能吸收体FC3/MXene，设计了一种受海胆壳启发的仿生周期结构，由于其各向同性结构和高孔隙率，实现了令人瞩目的- 64.48 dB值和2 - 18 GHz的全吸收带。此外，在雷达截面（RCS）仿真中，FC3/MXene吸波器有效地缩短了无人机（UAV）的雷达探测距离，显示出优异的隐身特性。展望未来，本工作不仅通过顺序界面工程实现了超低厚度下的强RL强度，而且通过仿生周期结构设计获得了超宽的吸收带，为多种先进技术应用开辟了新的可能性。Process Optimization for Sustainable Composites from Post-Consumer PET Carpet and Recycled PET ResinSiddhesh Chaudhari, Clinton Switzer, Mohamadreza Y. Azarfam, Anuj Maheshwari, Frank D. Blum, Jay C. Hanan, Sudheer Bandla, Ranji Vaidyanathandoi:10.1016/j.compositesb.2025.112367 消费后PET地毯和再生PET树脂可持续复合材料的工艺优化In the United States, over 90% of discarded carpets end up in landfills, primarily due to the costly and time-consuming process of mechanically separating carpet fibers from their backing. This research uses a novel approach for reusing post-consumer polyethylene terephthalate (PET) by developing recycled composites from post-consumer PET carpet (cPET) and recycled PET (rPET) resin sourced from bottle discards via compression molding. Incorporating whole carpets in the process significantly reduces preprocessing costs and time. A design of experiments approach was employed with variables such as temperature, pressure, dwell time, and composition to optimize mechanical properties. A two-level fractional factorial design for screening followed by a three-level full factorial design was performed to identify suitable processing parameters to achieve better mechanical properties. The optimal molding processing conditions for rPET/cPET (30/70) composites were identified as 270 °C for 250 s under 1 MPa, which yielded a flexural strength of 54.6 ± 6.0 MPa and a flexural modulus of 3180 ± 110 MPa, as verified through reproducibility testing on 10 samples (2 samples each from 5 molding experiments). These enhanced mechanical properties showcase the potential of rPET/cPET composites for structural applications. The composites made up of 30% recycled PET resin and 70% post-consumer PET carpet show that a larger fraction of carpet offers a sustainable alternative approach to reduce landfill waste from carpets and develop environmentally friendly materials with good structural integrity.在美国，超过90%的废弃地毯最终都被扔进了垃圾填埋场，这主要是因为机械分离地毯纤维的过程既昂贵又耗时。本研究采用了一种新的方法来再利用消费后的聚对苯二甲酸乙二醇酯（PET），通过压缩成型从消费后的PET地毯（cPET）和回收的PET （rPET）树脂中开发再生复合材料。将整块地毯纳入加工过程，大大减少了预处理成本和时间。采用温度、压力、停留时间、成分等变量的实验设计方法优化材料的力学性能。采用两水平分数因子设计进行筛选，然后进行三水平全因子设计，以确定合适的加工参数，以获得更好的机械性能。确定了rPET/cPET（30/70）复合材料的最佳成型工艺条件为270℃、250 s、1 MPa，弯曲强度为54.6±6.0 MPa，弯曲模量为3180±110 MPa，并通过10个样品（5个成型实验各2个样品）的重复性测试进行验证。这些增强的机械性能展示了rPET/cPET复合材料在结构应用中的潜力。由30%的再生PET树脂和70%的消费后PET地毯组成的复合材料表明，更大比例的地毯提供了一种可持续的替代方法，可以减少地毯的填埋废物，并开发具有良好结构完整性的环保材料。Preparation of a multifunctional bio-based adhesive inspired by the structure of dragonfly wingsGenghao Zheng, Shuting Zhang, Yuanwei Wang, Anbo Pan, Bangke Xu, Yantao Xu, Xiaochun Zhangdoi:10.1016/j.compositesb.2025.112374 受蜻蜓翅膀结构启发的多功能生物基胶粘剂的制备Traditional formaldehyde-based adhesives have problems such as dependence on petrochemical resources and release of formaldehyde. Therefore, preparing multifunctional bio-based adhesives with excellent mechanical properties to replace formaldehyde-based adhesives plays an important role in environmental sustainability. In this paper, a soy protein adhesive that combines high toughness and strength was developed inspired by dragonfly wings. This strategy is based on a rigid neural network (CNF) framework and SPI-based dynamic network system. Functionalized nanofibers (CNF@TP) were tightly connected to SPI through Schiff base reaction and strong hydrogen bonding. The dry and wet shear strength of plywood prepared with modified adhesive reached 1.89 MPa and 1.25 MPa respectively, which were 117.2% and 119.3% higher than SPI adhesive. The inorganic mineral component (ZnO) formed an organic-inorganic hybrid structure with soy protein, which improved the mildew resistance, flame retardancy and UV resistance of the adhesive. The storage time of the liquid/solid adhesive was extended to 30/50 days respectively. Cross-linker (TGA) strengthened the cross-linked network, the moisture absorption rate of the adhesive decreased to 11.9%, the residual rate increased to 56.8%, improved the water resistance. This bionic structure engineering (BSE) provides a research idea for the development of multifunctional composite materials with strong performance. This technology is expected to be applied to many fields such as plywood industry, aerospace and cultural relics restoration.传统的甲醛基胶粘剂存在对石化资源的依赖和甲醛释放等问题。因此，制备具有优异力学性能的多功能生物基胶粘剂替代甲醛基胶粘剂对环境可持续性具有重要意义。本文以蜻蜓翅膀为灵感，研制了一种高韧性和高强度的大豆蛋白胶粘剂。该策略基于刚性神经网络框架和基于spi的动态网络系统。功能化纳米纤维（CNF@TP）通过席夫碱反应和强氢键与SPI紧密相连。改性胶粘剂制备的胶合板干、湿抗剪强度分别达到1.89 MPa和1.25 MPa，比SPI胶粘剂分别提高117.2%和119.3%。无机矿物组分（ZnO）与大豆蛋白形成有机-无机杂化结构，提高了胶粘剂的抗霉性、阻燃性和抗紫外线性。液体/固体胶粘剂的保存时间分别延长至30/50天。交联剂（TGA）增强了交联网络，胶粘剂的吸湿率降至11.9%，残留率提高至56.8%，提高了耐水性。这种仿生结构工程（BSE）为开发高性能多功能复合材料提供了研究思路。该技术有望应用于胶合板工业、航空航天、文物修复等诸多领域。Preparation of metal-based microencapsulated phase change material and its application in a battery for thermal management and thermal runaway protectionYuanyuan Chen, Xiaojie Guo, Chenwu Shi, Xin Zhou, Deqiu Zoudoi:10.1016/j.compositesb.2025.112376 金属基微胶囊化相变材料的制备及其在电池热管理和热失控保护中的应用The performance and safety of lithium-ion batteries are significantly affected by temperature, and thermal management and thermal runaway protection are necessary. The temperature ranges of battery thermal management and thermal runaway based on phase change materials (PCMs) are inconsistent. A single organic PCM and hydrated salt PCMs have application limitations. In this article, low temperature phase change microcapsules (MEPCM) with thermal management capabilities and medium temperature MEPCM with thermal runaway protection functions have been innovatively prepared respectively, and the performance of their mixture was studied. The results showed that the latent heat value of low temperature MEPCM was 231.4 J/cm3, indicating high thermal reliability. The latent heat value of the medium temperature MEPCM was 426.1 J/cm3, exhibiting good thermal shock resistance and thermal response characteristic. At an ambient temperature of 35 °C and a discharge rate of 4C, the maximum temperature of the battery based on MEPCM mixture is 54.8 °C. At room temperature, MEPCM mixture delayed the time of thermal runaway by 30%. After 100 s, the outside temperature of the battery was 68.6 °C, decreasing the heating rate by 81.4%. The MEPCM mixture possesses flame retardancy and didn’t release heat, greatly improving the safety of power battery operation.锂离子电池的性能和安全性受温度影响较大，需要进行热管理和热失控保护。基于相变材料的电池热管理和热失控的温度范围不一致。单一有机PCM和水合盐PCM具有应用局限性。本文分别创新制备了具有热管理功能的低温相变微胶囊（MEPCM）和具有热失控保护功能的中温相变微胶囊（MEPCM），并对其混合物的性能进行了研究。结果表明，低温MEPCM潜热值为231.4 J/cm3，具有较高的热可靠性。中温MEPCM的潜热值为426.1 J/cm3，具有良好的抗热震性和热响应特性。在环境温度为35℃，放电倍率为4C的条件下，MEPCM混合物电池的最高温度为54.8℃。在室温下，MEPCM混合物使热失控时间延迟30%。100s后，电池外部温度为68.6℃，升温速率降低81.4%。MEPCM混合物具有阻燃性，不释放热量，大大提高了动力电池的运行安全性。Green Facile fabrication of Flame-retardant Straw Cellulose Nanofiber Laminate with Enhanced Mechanical StrengthRui Yang, Jing Zhou, Xiaoqi Yang, Haiyang Lu, Linghui Qi, Yue Ni, Changlei Xia, Jianzhang Lidoi:10.1016/j.compositesb.2025.112377 提高机械强度的阻燃秸秆纤维素纳米纤维层压板的绿色工艺制备Natural biomass resources are highly valued for their high biodegradability, high sustainability, and easy modification. However, their large-scale application is limited by their flammability. Numerous flame-retardant modification methods have been developed. However, they are limited by low performance and poor mechanical properties. In this study, a novel method was proposed for preparing flame-retardant cellulose nanofiber laminates, focusing on raw material selection, modification method, and laminated structure. The silica in natural straw was retained, and the fibers were swollen using the green and environmentally friendly deep eutectic solvent, resulting in the partial dissolution of cellulose. This process reduced the energy consumption of mechanical treatment during the preparation of straw cellulose nanofibers. Sulfonic acid groups were grafted onto the straw cellulose to impart flame-retardant properties to the material. By leveraging the laminated structure to block heat transfer between layers, the material achieved excellent flame-retardant performance and mechanical properties. The flame-retardant straw cellulose nanofiber laminate achieved an LOI of 61.9%. The results of thermogravimetric analysis showed that the residual carbon content can reach 37.6%, which is 40.3% higher than that of the CNFL. This study presents a novel approach to developing flame-retardant biomass boards.天然生物质资源具有生物可降解性高、可持续性强、易修饰等特点。然而，它们的可燃性限制了它们的大规模应用。许多阻燃改性方法已经被开发出来。然而，它们受到性能低和机械性能差的限制。本文提出了一种制备阻燃型纤维素纳米纤维层压板的新方法，重点从原料选择、改性方法、层合结构等方面进行了研究。利用绿色环保的深共晶溶剂，保留天然秸秆中的二氧化硅，膨胀纤维，使纤维素部分溶解。该工艺降低了秸秆纤维素纳米纤维制备过程中机械处理的能耗。将磺酸基团接枝到秸秆纤维素上，使材料具有阻燃性能。通过利用层压结构来阻止层之间的热量传递，该材料获得了优异的阻燃性能和机械性能。秸秆纤维素纳米纤维复合阻燃材料的LOI值为61.9%。热重分析结果表明，其残余碳含量可达37.6%，比CNFL高40.3%。本研究提出了一种开发阻燃生物质板的新途径。Unprecedented laser metal deposition (LMD) biofabrication of nano-ZrO2 reinforced structure-function-integrated Ti-Cu composite: fabrication, wear, biofunctionalityWenze Wang, Xin Li, Chaochun Zhao, Andrej Atrens, Ming-Chun Zhaodoi:10.1016/j.compositesb.2025.112379 史无前例的激光金属沉积（LMD）生物制备纳米zro2增强结构-功能集成Ti-Cu复合材料：制备、磨损、生物功能The significance of biomedical applications of Ti alloys is underscored by their widespread utilization as implantable materials. Ti alloy implants are sensitive to fretting wear, which easily leads to early failure. Wear is a major factor in determining the long-term clinical performance. Based on structure-function-integrated concept, this work aims to explore an improved wear-resistant self-antibacterial 3ZrO2/Ti-3Cu composite using pure Ti powder, Cu powder and nano-ZrO2 powder via laser metal deposition (LMD). The forming quality, wear performance, and biofunctionality of LMDed 3ZrO2/Ti-3Cu samples were characterized through specific electron microscopy, mechanical wear tests, and in vitro cell tests. A slightly lower energy density resulted in the best fabrication quality. The spherical morphology of the powders compensated for the different thermodynamic properties of nano-ZrO2, achieving higher densification. The addition of nano-ZrO2 into Ti-3Cu refined grains, increased yield strength by 67% (from 979 MPa to 1637 MPa), microhardness by 62% (from 291 HV0.5 to 472 HV0.5), and Young's modulus by 17%, maintaining the modulus within the range of human bone. It also reduced wear rate by 36% (from 0.425 mm3/Nm to 0.366 mm3/Nm) and biocorrosion rate by 32% (from 3.0×10-8 A/cm2 to 1.8×10-8 A/cm2), indicating less corrosion-wear. In addition, LMDed 3ZrO2/Ti-3Cu showed excellent biocompatibility and bacteriostatic rate > 99% against E. coli. Nano-ZrO2 enhanced strength, wear and corrosion resistance, while Cu-rich precipitates and Cu ion release provided synergistic antibacterial activity. This work provides a new horizon into the LMD fabrication of improved wear-resistant self-antibacterial structure-function-integrated implant materials.钛合金作为植入式材料的广泛应用强调了其生物医学应用的重要性。钛合金种植体对微动磨损敏感，易导致早期失效。磨损是决定长期临床表现的主要因素。基于结构功能一体化的理念，本工作旨在通过激光金属沉积（LMD）技术，以纯Ti粉、Cu粉和纳米zro2粉为原料，探索一种改进的耐磨自抗菌3ZrO2/Ti- 3cu复合材料。通过特定的电子显微镜、机械磨损试验和体外细胞试验表征了LMDed 3ZrO2/Ti-3Cu样品的成形质量、磨损性能和生物功能。较低的能量密度导致了最佳的制造质量。粉末的球形形貌补偿了纳米zro2不同的热力学性质，实现了更高的致密化。在Ti-3Cu细化晶粒中加入纳米zro2，屈服强度提高67%（从979 MPa提高到1637 MPa），显微硬度提高62%（从291 HV0.5提高到472 HV0.5），杨氏模量提高17%，模量保持在人骨的范围内。同时，它还将磨损率降低了36%（从0.425 mm3/Nm降至0.366 mm3/Nm），生物腐蚀率降低了32%（从3.0×10-8 A/cm2降至1.8×10-8 A/cm2），表明腐蚀磨损减少。此外，LMDed 3ZrO2/Ti-3Cu具有良好的生物相容性，对大肠杆菌的抑菌率高达99%。纳米zro2增强了强度、耐磨性和耐腐蚀性，而富Cu沉淀和Cu离子释放具有协同抗菌活性。本研究为改进的自抗菌结构-功能一体化种植体材料的LMD制备提供了新的思路。Real-time Process Monitoring and Prediction of Flow-front in Resin Transfer Molding Using Electromechanical Behavior and Generative Adversarial NetworkDahun Lee, In Yong Lee, Young-Bin Parkdoi:10.1016/j.compositesb.2025.112382 基于机电行为和生成对抗网络的树脂传递成型过程实时监控与流前预测Lightweight materials have been utilized for several decades, offering advantages in industries such as aerospace, automotive, and wind turbine manufacturing. Among these, fiber-reinforced plastics are widely utilized owing to their excellent mechanical properties. Resin transfer molding—a method for manufacturing thermoset composites—is susceptible to dry spots, which degrade the mechanical properties. Accurately identifying and predicting the flow front can enhance process robustness, ensuring defect-free composites. This study presents a novel approach for identifying flow fronts in real time and predicting flow-front scenarios using a tree model and a generative adversarial network (GAN). First, the changes in electrical resistance during infusion were investigated by examining the electromechanical behavior. Subsequently, by leveraging the electrical resistance data, linear equations were formulated to identify the locations of flow fronts between the electrodes. Finally, possible flow-front configurations were identified across three sections, encompassing 17 scenarios, using the developed identification model. Flow-front prediction was conducted using the tree model, which evaluated all 17 scenarios and tracked the most relevant scenarios according to probability. Additionally, the GAN generated more realistic flow-front configurations, enhancing both the identification and prediction of the flow. This model can reflect the racetracking effect without considering the permeability of the fiber preform, significantly reducing the computational cost compared with numerical simulations. Moreover, the flow-front prediction model effectively mirrored the experimental results, outperforming numerical simulations in both adaptability and speed. By utilizing this model, operators can identify defects such as dry spots in real time and predict their locations using the predicted flow-front configuration.轻量化材料已经使用了几十年，在航空航天、汽车和风力涡轮机制造等行业提供了优势。其中，纤维增强塑料因其优异的力学性能而得到广泛应用。树脂转移成型-一种制造热固性复合材料的方法-容易受到干燥点的影响，从而降低机械性能。准确识别和预测流锋可以提高工艺的鲁棒性，确保复合材料无缺陷。本研究提出了一种利用树模型和生成对抗网络（GAN）实时识别流锋并预测流锋情景的新方法。首先，通过检测电力学行为，研究了输液过程中电阻的变化。随后，通过利用电阻数据，制定线性方程来确定电极之间流动锋的位置。最后，使用开发的识别模型，在三个部分中确定了可能的流前配置，包括17种场景。流前预测采用树形模型进行，该模型评估了所有17种情景，并根据概率跟踪了最相关的情景。此外，GAN生成了更真实的流前结构，增强了对流的识别和预测。该模型可以在不考虑纤维预制棒渗透性的情况下反映赛道跟踪效应，与数值模拟相比显著降低了计算成本。此外，流锋预测模型有效地反映了实验结果，在适应性和速度上都优于数值模拟。通过利用该模型，操作人员可以实时识别缺陷，如干点，并使用预测的流前配置预测其位置。Towards ultra-fast and high strength structural repair of damaged thermoplastic composites: ultrasonic weldingTian Zhao, Shuaiheng Xu, Yu Feng, Chenqian Zhang, Yixing Huang, Xianben Ren, Ying Lidoi:10.1016/j.compositesb.2025.112385 损伤热塑性复合材料的超快速、高强度结构修复：超声焊接Owing to its high weld strength, rapid processing cycles and absence of foreign materials at the weldline, ultrasonic welding is considered as a promising technique for joining thermoplastic composites, as an alternative to traditional mechanical fastening and adhesive bonding. More importantly, this technique provides a potential possibility for repairing damaged composite structures with an extremely short duration. This paper presents a preliminary study on the feasibility of repairing an open-hole thermoplastic composite structure by using an external patch ultrasonically welded with different time durations. Both tensile and flexural behaviors of the repaired composite specimens were investigated. The damage processes of different specimens were synchronously characterized by using acoustic emission and digital image correlation techniques. Both the experimental and numerical results demonstrated a significant improvement in the mechanical performance of the weld-repaired specimens compared to the unrepaired ones. Additionally, the weld-repair patch effectively reduced the stress concentration in the periphery of the damaged area.超声波焊接具有焊接强度高、加工周期快、焊缝无异物等优点，被认为是热塑性复合材料连接的一种很有前途的技术，可以替代传统的机械紧固和胶粘接。更重要的是，该技术提供了在极短的时间内修复受损复合材料结构的潜在可能性。本文对利用超声焊接不同时间的外贴片修复热塑性复合材料开孔结构的可行性进行了初步研究。对修复后的复合材料试件的拉伸和弯曲性能进行了研究。采用声发射和数字图像相关技术对不同试样的损伤过程进行了同步表征。实验和数值结果均表明，焊接修复后试件的力学性能较未修复试件有显著改善。此外，焊补片有效地降低了损伤区域外围的应力集中。Isothermal Crystallization of Poly(ether ether ketone)/Carbon Fiber CompositesXiaoshi Zhang, Ryan Flanigan, Gijs de Kort, Ralph H. Colby, Alicyn M. Rhoadesdoi:10.1016/j.compositesb.2025.112386 聚醚醚酮/碳纤维复合材料的等温结晶The quiescent crystallization kinetics of Poly(ether ether ketone) (PEEK) carbon fiber composites are highly relevant to polymer processing techniques that operate no shear or low shear conditions, such as 3D printing and automated fiber placement. This study investigates the isothermal crystallization kinetics of neat PEEK and its carbon fiber counterparts. We analyzed one commercial grade with 30 wt% carbon fiber and two lab-compounded grades with lower carbon fiber contents (5 and 15 wt%) using X-ray Micro Computed Tomography (μCT) and calorimetry technologies. μCT analyzed the volume fractions of PEEK resin, carbon fibers, and voids formed during processing. The carbon fiber content was also determined based on the volumetric fraction of each component. Using differential scanning calorimetry (DSC) and fast scanning calorimetry (FSC), the overall crystallization kinetics were extracted for neat PEEK and its carbon fiber composites over a wide range of crystallization temperatures from 160 °C to 330 °C. All kinetics data were fitted well using the Hoffman-Lauritzen model to extract values for U∗, K0, and KG. The results indicate that the energy barriers associated with chain segment mobility U∗ and nucleation KG do not significantly change with the presence of carbon fiber. However, K0, associated with the nucleation constant, decreases linearly with increasing non-resin volume fraction. Morphological investigations using scanning electron microscopy (SEM) and Fast Scanning Calorimetry - Atomic Force Microscopy (FSC-AFM) demonstrate the presence of weak surface nucleation and impingement effects from carbon fiber on PEEK resin crystallization. Based on these observations, we propose a simple mathematical model to describe the crystallization peak time of fiber-reinforced thermoplastic composites, in which fibers and voids primarily contribute to the slowdown of crystal growth.聚醚醚酮（PEEK）碳纤维复合材料的静止结晶动力学与无剪切或低剪切条件下的聚合物加工技术密切相关，例如 3D 打印和自动纤维铺放。本研究对纯 PEEK 及其碳纤维复合材料的等温结晶动力学进行了研究。我们采用 X 射线微计算机断层扫描（μCT）和热分析技术对一种含 30%（质量分数）碳纤维的商用级材料以及两种含碳纤维量较低（5%和 15%）的实验室合成级材料进行了分析。μCT 分析了加工过程中 PEEK 树脂、碳纤维和孔隙的体积分数。碳纤维含量也是根据各组分的体积分数来确定的。通过差示扫描量热法（DSC）和快速扫描量热法（FSC），我们获得了纯 PEEK 及其碳纤维复合材料在 160°C 至 330°C 广泛结晶温度范围内的整体结晶动力学。所有动力学数据均采用霍夫曼 - 劳里森模型进行拟合，以提取 U、K0 和 KG 的值。结果表明，碳纤维的存在对链段运动能垒 U 和成核能垒 KG 没有显著影响。然而，与成核常数相关的 K0 随非树脂体积分数的增加呈线性下降。通过扫描电子显微镜（SEM）和快速扫描量热法 - 原子力显微镜（FSC-AFM）进行的形态学研究证明，碳纤维对聚醚醚酮（PEEK）树脂结晶存在弱表面成核和碰撞效应。基于这些观察结果，我们提出一个简单的数学模型来描述纤维增强热塑性复合材料的结晶峰时间，在该模型中，纤维和孔隙主要导致晶体生长速度减慢。Review on the 3D printing technology and application of magnetic materials: Material-Process-Structure-ApplicationHaorui Zhai, Xiaodong Li, Shuzhou Yu, Jianlei Wang, Ying Chang, Jun Li, Xinghua Cheng, Lei Zhou, Yikun Fang, Tao Liu, Xiaojun Yu, Minggang Zhu, Bo Li, Wei Lidoi:10.1016/j.compositesb.2025.112387磁性材料3D打印技术及应用综述：材料-工艺-结构-应用Magnetic materials, as a type of functional material, play an important role in many fields. However, the traditional manufacturing process is limited for only forming simple geometric shapes, which restricts the application and development of magnetic materials. 3D printing technology provides a new path for the development, structural design, and applications of magnetic materials, with the advantages of low cost, flexible design, and rapid prototyping, which will be one of the most promising technology for the magnetic materials. In this paper, aiming at the 3D printing technology, the advanced magnetic materials are discussed, such as soft magnetic materials, hard magnetic materials and their composite materials; the new manufacturing processes are analyzed, such as magnetic field-assisted 3D printing; the innovative structures are introduced, such as bionic structure and honeycomb structure; and the typical applications are presented, such as soft robots, 4D printing, and drug delivery. Moreover, the interaction relation among the ''material — process — structure — application'' in 3D printing of the magnetic materials is figured out, and the optimal adaptability among them is compared and evaluated. Finally, current challenges and future opportunities are summarized and discussed. The results show that with the continuous development of new 3D printing technologies for magnetic materials, more innovations will be created in magnetic materials, processes, structures, and applications.磁性材料作为一种功能材料，在许多领域发挥着重要作用。然而，传统的制造工艺仅限于形成简单的几何形状，这限制了磁性材料的应用和发展。3D打印技术以其低成本、设计灵活、快速成型等优势，为磁性材料的开发、结构设计和应用提供了新的途径，将成为磁性材料领域最具发展前景的技术之一。本文针对3D打印技术，讨论了先进的磁性材料，如软磁材料、硬磁材料及其复合材料；分析了磁场辅助3D打印等新型制造工艺；介绍了仿生结构和蜂窝结构等创新结构；并介绍了其在软机器人、4D打印、药物输送等方面的典型应用。分析了磁性材料3D打印中“材料-工艺-结构-应用”之间的相互作用关系，并对三者之间的最优适应性进行了比较和评价。最后，对当前的挑战和未来的机遇进行了总结和讨论。结果表明，随着磁性材料3D打印新技术的不断发展，磁性材料、工艺、结构和应用将会有更多的创新。Construction of “rigid-and-flexible” interphase by waterborne carboxylated polyimide sizing agent for interfacial enhancement of carbon fiber/poly ether ether ketone (CF/PEEK) compositesWentao Chen, Ke Zhang, Shuai Wang, Chunhai Chen, Xiaogang Zhao, Hongwei Zhou, Daming Wangdoi:10.1016/j.compositesb.2025.112388 水性羧化聚酰亚胺施胶剂构建“刚柔”界面增强碳纤维/聚醚醚酮（CF/PEEK）复合材料界面The application of polyimide (PI) as an effective sizing agent for carbon fiber (CF) in CF/poly ether ether ketone (PEEK) composites represents a promising approach. Here, a series of novel carboxylated waterborne PI sizing agents with different aliphatic ratios were designed to construct a rigid-flexible gradient interphase for the purpose of promoting interfacial adhesion between CF and PEEK. It was observed that the mechanical properties of the composites were optimal when the molar ratio of rigid diamine monomer to flexible diamine monomer reached 7:3. Significant augmentation was observed in various mechanical and interfacial properties, including tensile modulus (25.6%), tensile strength (19.8%), flexural modulus (28.5%), flexural strength (15.8%), impact strength (24.3%), and IFSS (57.8%). Furthermore, the tensile strength of the composites exhibited a greater increase (27.2%) at elevated temperatures, thus indicating that the role of the interfacial layer was more pronounced at high temperatures. The interphase was analysed by peak force quantitative nanomechanical imaging (PF-QNM) mode of atomic force microscopy (AFM), the results indicated the formation of a modulus transition zone between the CF and PEEK. This zone exhibited a gradient change of modulus, enabling the composite to transfer and distribute applied loads more effectively when subjected to external forces. Consequently, the findings of this study demonstrated the potential of waterborne PI sizing agents for application on CF, offering a promising avenue for surface modification of high-performance CF/PEEK composites.聚酰亚胺（PI）作为碳纤维（CF）的有效施胶剂应用于CF/聚醚醚酮（PEEK）复合材料是一种很有前途的方法。本研究设计了一系列具有不同脂肪族比例的新型羧基水性PI施胶剂，以构建刚柔梯度界面相，以促进CF和PEEK之间的界面粘附。当刚性二胺单体与柔性二胺单体的摩尔比为7:3时，复合材料的力学性能最佳。拉伸模量（25.6%）、拉伸强度（19.8%）、弯曲模量（28.5%）、弯曲强度（15.8%）、冲击强度（24.3%）和IFSS（57.8%）等力学和界面性能均有显著提高。此外，复合材料的抗拉强度在高温下有较大的提高（27.2%），表明界面层的作用在高温下更为明显。利用原子力显微镜（AFM）峰力定量纳米力学成像（PF-QNM）模式对界面相进行分析，结果表明CF和PEEK之间形成了模量过渡区。该区域表现出模量的梯度变化，使复合材料在受到外力时能够更有效地传递和分配施加的载荷。因此，本研究的发现证明了水性PI施胶剂在CF上的应用潜力，为高性能CF/PEEK复合材料的表面改性提供了一条有前途的途径。Machine learning-assisted prediction of mechanical properties in WC-based composites with multicomponent alloy bindersHui Ren, Kaiyue Wang, Kai Xu, Ming Lou, Gaohui Kan, Qingtao Jia, Changheng Li, Xuelian Xiao, Keke Changdoi:10.1016/j.compositesb.2025.112389 多组分合金粘结剂wc基复合材料力学性能的机器学习辅助预测The development of WC-based composites capable of withstanding harsh environments has traditionally been hindered by time- and cost-intensive trial-and-error strategies. In this study, a machine learning (ML) framework was developed to rapidly predict the hardness and fracture toughness of WC-based composites, focusing on alternatives to traditional Co binder, which are prone to corrosion in marine environment. Experimental data were collected from published literature and used to train three ML models, i.e., Backpropagation Neural Networks, Gradient Boosting Decision Tree, and Support Vector Regression. The results showed that the BPNN algorithm demonstrated the good predictive performance, achieving R2 values of 0.913 and 0.906 for hardness and fracture toughness, respectively. The predictive accuracy was experimentally validated using samples prepared with binders composed of Co, Ni, Fe, or their alloys. SHAP (SHapley Additive exPlanations) analysis revealed that grain size significantly impacted the hardness model of WC-based composites, while electronegativity was the most influential chemical descriptor affecting the hardness and fracture toughness models. This proposed framework shows effectiveness of ML approach for the development of multicomponent alloy binders in WC-based composites, with superior mechanical properties and enhanced applicability in harsh environments.传统上，能够承受恶劣环境的wc基复合材料的开发一直受到时间和成本密集的试错策略的阻碍。在这项研究中，开发了一个机器学习（ML）框架，以快速预测wc基复合材料的硬度和断裂韧性，重点是替代传统Co粘合剂，这些粘合剂在海洋环境中容易腐蚀。实验数据从已发表的文献中收集，并用于训练三个ML模型，即反向传播神经网络，梯度增强决策树和支持向量回归。结果表明，BPNN算法具有较好的预测性能，对硬度和断裂韧性的预测R2分别为0.913和0.906。用Co， Ni， Fe或其合金组成的粘合剂制备样品，实验验证了预测的准确性。SHapley加性解释（SHapley Additive explanation）分析表明，晶粒尺寸对wc基复合材料的硬度模型有显著影响，而电负性是影响硬度和断裂韧性模型的最重要的化学描述符。该框架显示了ML方法在wc基复合材料中开发多组分合金粘结剂的有效性，具有优越的机械性能和增强的恶劣环境适用性。Composites Science and TechnologyDrawing of tungsten fiber tows impregnated with Al/Epoxy matrix composites: interfacial bonding and failureZhenhui He, Enling Tang, Wenjin Yao, Ruizhi Wangdoi:10.1016/j.compscitech.2025.111140 Al/环氧基复合材料浸渍钨纤维束的拉伸：界面结合和失效The most widely used high-performance resin matrix composites generally follow the microparticle-fiber-epoxy resin system structure. However, due to the difference in material properties of each component, the failure of fiber-reinforced resin matrix composites is often caused by its internal load inhomogeneity. In this paper, digital image technology is used to quantify the micro-failure form of the interface between fiber and epoxy resin matrix based on droplet solidification experiment and tungsten fiber impregnation tensile experiment. The upper and lower limits of coupling between fibers in fiber-reinforced polymer matrix composites were quantified, and a universal prediction method for the strength of fiber-reinforced particle-doped resin matrix composites was developed. The research results show that: A small amount of Al particles inclusion can enhance the affinity between the epoxy resin matrix and the tungsten material, thereby improving the mechanical properties of the fiber reinforced resin matrix material. When the amount of aluminum particles is 15vol%, the viscous flow performance of the epoxy resin is similar to that of the pure epoxy resin. The load-bearing efficiency will be generated by the mutual nesting at the interface in the epoxy resin-tungsten fiber structure, where the maximum insertion depth is 9.08μm and the average insertion depth is 4.69μm. The maximum tensile load shows a trend of increasing first and then decreasing with the increase of aluminum particle volume content, reaching its maximum value at a volume inclusion of 40vol%. The closer the epoxy resin matrix to the fiber, the greater the effect on the interfacial chelation effect, in which the effective interphase thickness is 0.128 times the fiber radius. The energy absorption of pure epoxy resin-single fiber bonding phase is 138.45MJ/m3, while the energy absorption of the effective bonding area between epoxy matrix and tungsten fiber is between 76.52∼224.95MJ/m3 when aluminum particles are mixed.目前应用最广泛的高性能树脂基复合材料一般遵循微粒-纤维-环氧树脂体系结构。然而，由于各组分材料性能的差异，纤维增强树脂基复合材料的失效往往是由其内部载荷的不均匀性引起的。本文在液滴凝固实验和钨纤维浸渍拉伸实验的基础上，采用数字图像技术定量分析了纤维与环氧树脂基体界面的微观破坏形式。量化了纤维增强聚合物基复合材料中纤维间耦合的上下限，建立了一种通用的纤维增强颗粒掺杂树脂基复合材料强度预测方法。研究结果表明：少量Al颗粒的夹杂可以增强环氧树脂基体与钨材料之间的亲和力，从而改善纤维增强树脂基体材料的力学性能。当铝颗粒掺量为15vol%时，环氧树脂的粘性流动性能与纯环氧树脂相似。环氧树脂-钨纤维结构界面处的互嵌套将产生承载效率，其中最大嵌套深度为9.08μm，平均嵌套深度为4.69μm。最大拉伸载荷随铝颗粒体积含量的增加呈现先增大后减小的趋势，在体积夹杂量为40vol%时达到最大值。环氧树脂基体离纤维越近，对界面螯合效果的影响越大，其中有效界面厚度为纤维半径的0.128倍。纯环氧树脂-单纤维结合相的吸能为138.45MJ/m3，而混合铝颗粒时环氧基与钨纤维有效结合面积的吸能在76.52 ~ 224.95MJ/m3之间。Role of the aspect ratio of graphene oxide (GO) on the interface and mechanical properties of vitrimer/GO nanocompositesShenzhi Shen, Ian A. Kinloch, Cristina Vallésdoi:10.1016/j.compscitech.2025.111151 氧化石墨烯长径比对玻璃聚合物/氧化石墨烯纳米复合材料界面和力学性能的影响Epoxy vitrimers are raising an increasing interest for the formulation of multifunctional nanocomposites due to their reversible covalently crosslinked network capable of self-arranging upon stimulation without losing integrity, providing them with new properties such as self-healing or shape memory. The incorporation of functionalized nanomaterials to epoxy vitrimers can further improve and promote those functions, due to the formation of strong reversible vitrimer/nanofiller interfaces. Herein, how the addition of graphene oxide (GO) flakes with different aspect ratios affects such interface, hence the properties, of vitrimer/GO nanocomposites was investigated and compared to those rendered by their epoxy analogues. An evaluation of the nature of the GO/polymers interface performed by Raman spectroscopy confirmed the existence of stronger interfaces between both GOs and the vitrimer relative to the epoxy, which led to better dispersions of the flakes and enhanced mechanical properties, independently of the flakes’ aspect ratio. Thicker GO flakes were found, however, to render stronger interfaces, hence better mechanical properties, than thinner flakes with higher aspect ratio. The stress-relaxation behaviour of both matrices was found to improve by adding GO materials as fillers, with this result being more pronounced for the vitrimer systems and independent on the aspect ratio of the GO flakes. These findings suggest not only that vitrimer/GO nanocomposites can lead to improved mechanical and stress-relaxation properties relative to their epoxy analogues, but also that selecting a GO with a specific aspect ratio allows the design of nanocomposites with specific structure and mechanical properties through a control of the filler-polymer interface.由于环氧树脂的可逆共价交联网络能够在受到刺激时自排列而不失去完整性，从而为其提供了诸如自修复或形状记忆等新特性，因此，人们对多功能纳米复合材料的配方越来越感兴趣。功能化纳米材料掺入环氧树脂可以进一步改善和促进这些功能，因为形成了强可逆的玻璃聚合物/纳米填料界面。本文研究了不同长宽比氧化石墨烯（GO）薄片的加入如何影响这种界面，从而影响玻璃聚合物/氧化石墨烯纳米复合材料的性能，并将其与环氧类似物进行了比较。通过拉曼光谱对氧化石墨烯/聚合物界面的性质进行了评估，证实了相对于环氧树脂，氧化石墨烯和玻璃体之间存在更强的界面，这导致了更好的薄片分散性和增强的机械性能，而与薄片的长宽比无关。然而，较厚的氧化石墨烯薄片比较薄的高纵横比的薄片具有更强的界面，因此具有更好的机械性能。通过添加氧化石墨烯材料作为填料，两种基质的应力松弛行为都得到了改善，这一结果在玻璃体体系中更为明显，并且与氧化石墨烯薄片的长径比无关。这些发现表明，玻璃聚合物/氧化石墨烯纳米复合材料的机械性能和应力松弛性能优于环氧树脂类似物，而且选择具有特定宽高比的氧化石墨烯可以通过控制填料-聚合物界面来设计具有特定结构和机械性能的纳米复合材料。Modified rule of mixtures and Halpin-Tsai models applied to PCL/NiMnInCo 4D printed composites. Internal stresses study during the martensitic transformation.F.D. Lambri, F.G. Bonifacich, O.A. Lambri, B. Weidenfeller, V. Recarte, V. Sánchez-Alarcos, J.I. Pérez-Landazábaldoi:10.1016/j.compscitech.2025.111153 改进的混合规则和Halpin-Tsai模型在PCL/ nimnico 4D打印复合材料中的应用。马氏体相变过程的内应力研究。4D printing enables the manufacturing of complex smart components in a wide variety of shapes. In devices based on 4D printed composite materials, the interaction between the active microparticles and the printable polymer matrix plays a critical role for the optimal functionality. Key parameters in these materials are the elastic misfit coefficient, which monitors internal stresses, and elastic energy transfer, which determines the ability to transfer strain from the microparticles to the surrounding matrix. In this work, the temperature-dependent shear modulus of PCL/Ni45Mn36.7In13.3Co5 4D printed composites is analysed using the modified rule of mixture (ROM) and Halpin-Tsai (HT) models. The molecular flow caused by the polymer chain movement under oscillatory mechanical stress at relatively elevated temperatures is examined and discussed using these models. Additionally, the effect of an external direct magnetic field on the shear modulus is also analysed. Finally, the internal stresses in the composite materials resulting from the martensitic transformation in the active microparticles are studied through a modified mean-field model based on the Eshelby’s inclusion theory.4D打印可以制造各种形状的复杂智能部件。在基于4D打印复合材料的器件中，活性微粒与可打印聚合物基体之间的相互作用对于优化功能起着关键作用。这些材料的关键参数是弹性失配系数（监测内应力）和弹性能量传递（决定将应变从微粒传递到周围基体的能力）。本文采用改进的混合规则（ROM）和Halpin-Tsai （HT）模型分析了PCL/Ni45Mn36.7In13.3Co5 4D打印复合材料的温度相关剪切模量。用这些模型研究和讨论了在相对较高温度下振荡机械应力下聚合物链运动引起的分子流动。此外，还分析了外加磁场对剪切模量的影响。最后，通过基于Eshelby夹杂理论的修正平均场模型，研究了活性微粒马氏体相变对复合材料内应力的影响。来源：复合材料力学仿真Composites FEM

【新文速递】2025年3月25日复合材料SCI期刊最新文章

Composite Structures

Composites Part A: Applied Science and Manufacturing

Composites Part B: Engineering

【新文速递】2025年3月11日复合材料SCI期刊最新文章