今日更新：Composite Structures 10 篇，Composites Part A: Applied Science and Manufacturing 9 篇，Composites Part B: Engineering 1 篇，Composites Science and Technology 1 篇Composite StructuresVibration and response characteristics of variable stiffness composite plates enveloping piezoelectric panels with arbitrary cutouts: a unified discretization modelling frameworkBocheng Dong, Tianci Li, Rui Zhao, Jinze Li, Kaiping Yudoi:10.1016/j.compstruct.2026.120286任意切口变刚度包覆压电板的振动与响应特性：统一的离散化建模框架This study proposes a unified discretization dynamic model using a Gauss-Legendre quadrature approach for predicting the vibration and response characteristics of composite plates with arbitrary cutouts. Curvilinear fiber layouts and piezoelectric materials are introduced in the developed model to achieve variable stiffness design and active control. The virtual spring constraint technique is incorporated to allow flexible simulation switching for various boundary conditions. In the formed computational procedures, a theoretical framework is first constructed based on the first-order shear deformation theory and Rayleigh-Ritz method, with variable fiber angles of each laminate being set using the linear path function. The plate plane is subdivided into numerous discrete nodes using the Gaussian-Legendre quadrature idea, and cutout coordinates are described by mathematical mapping. A mass-stiffness assignment algorithm is implemented to characterize the missing solid elements. Forced and free vibration behaviors are obtained using the Newmark-Beta approach and eigen-parameter solvers. Convergence studies and model validations are conducted to verify the robustness and reliability of the model, and alternative parameters are identified to amplify the efficiency. The influences of variable stiffness schemes, cutouts, and electric intensity on the intrinsic characteristics and vibration response are revealed, and some suggestions for enhancing the vibration damping capacity are provided.本文提出了一种统一的离散化动力学模型，采用高斯-勒让德正交法预测具有任意切口的复合材料板的振动和响应特性。在该模型中引入曲线光纤布局和压电材料，实现变刚度设计和主动控制。采用虚拟弹簧约束技术，实现了不同边界条件下的灵活切换仿真。在形成的计算过程中，首先基于一阶剪切变形理论和瑞利-里兹法构建理论框架，利用线性路径函数设置各层合板的变纤维角度；利用高斯-勒让德正交思想将平板平面细分为多个离散节点，并用数学映射来描述切割坐标。采用质量-刚度分配算法对缺失实体单元进行表征。采用Newmark-Beta方法和特征参数解算得到了受迫和自由振动特性。通过收敛性研究和模型验证来验证模型的鲁棒性和可靠性，并确定替代参数以提高效率。分析了变刚度方案、剪切量和电强度对结构固有特性和振动响应的影响，并提出了提高结构减振能力的建议。Bioinspired bending-stretching synergy resolves structural toughness–strength conflicts in auxetic metamaterial latticeXiaobo Zhang, Guang Fu, Junjie Chen, Miao Zhao, Tao Luo, Hao Liang, Zhihao Ren, Tao Zhang, Zhonghua Li, Fei Liudoi:10.1016/j.compstruct.2026.120304仿生弯曲-拉伸协同作用解决了形变超材料晶格中的结构韧性-强度冲突Resolving the inherent structural toughness–strength conflicts in conventional auxetic metamaterials remains a fundamental challenge. This study proposed a biomimetic strategy drawing on the skeletal network of deep-sea sponges, establishing a parametric framework for generating programmable auxetic lattices. A multi-objective optimization methodology with parameter an alysis and theoretical modeling was developed to optimize mechanical properties and deformation behavior. The proposed design harmonizes structural strength with stable symmetric buckling deformation through synergized stretching- and bending-dominated deformation mechanis m. This integrated performance was further validated by FE an alysis. Experimental results on selective laser melting (SLM) manufactured 316 L lattices demonstrate that the enhanced auxetic lattice delivers 6.5-fold and 3.5-fold improvements in specific stiffness and strength, respectively. Additionally, it exhibits a Poisson’s ratio of −0.6 and specific energy absorption (SEA) of 8.81 J/g. This study establishes a systematic design paradigm from parametric design to optimization for auxetic metamaterials that require both load-bearing and energy dissipation capabilities.解决传统塑性超材料固有的结构韧性与强度冲突仍然是一个根本性的挑战。本研究提出了一种基于深海海绵骨骼网络的仿生策略，建立了一种生成可编程补缺网格的参数化框架。采用参数分析和理论建模相结合的多目标优化方法优化力学性能和变形行为。提出的设计通过拉伸和弯曲主导的协同变形机制，使结构强度与稳定的对称屈曲变形协调一致。通过有限元分析进一步验证了该综合性能。在选择性激光熔化（SLM）制造的316 L晶格上的实验结果表明，增强的auxetic晶格的比刚度和比强度分别提高了6.5倍和3.5倍。泊松比为- 0.6，比能吸收（SEA）为8.81 J/g。本研究建立了从参数化设计到优化的系统设计范式，用于同时需要承载和耗能能力的增减超材料。Circumferential tensile damage of filament-wound SiCf/SiC composite tubes: a multiscale structure-failure mapping driven by winding angleTianqi Zhu, Yufeng Dai, Gang Zhao, Xiulun Li, Liangliang Shen, Jian Xu, Yu Yangdoi:10.1016/j.compstruct.2026.120309 长丝缠绕SiCf/SiC复合材料管的周向拉伸损伤：缠绕角驱动的多尺度结构失效映射The complex three-dimensional architecture introduced by filament winding in silicon carbide fiber–reinforced silicon carbide ceramic matrix composite (SiCf/SiC CMC) tubes leads to pronounced angle-dependent mechanical responses under circumferential tensile loading, while the underlying structure–failure relationships remain insufficiently understood. In this study, filament-wound SiCf/SiC composite tubes with three representative winding angles (35°, 55°, and 75°) were systematically investigated using a combined multiscale experimental and numerical framework. Circumferential tensile tests reveal a non-monotonic dependence of mechanical performance on winding angle, with the 55° configuration exhibiting the highest circumferential strength—approximately 12% and 57% higher than those of the 35° and 75° tubes, respectively—together with the maximum failure strain, indicating superior load-transfer efficiency and damage tolerance. To elucidate the underlying mechanis ms, finite element models incorporating reconstructed realistic yarn trajectories were developed by coupling a three-dimensional Hashin failure criterion for yarns with a brittle fracture model for the matrix. The simulations demonstrate that winding angle strongly governs stress redistribution and damage evolution. At 55°, cooperative fiber pull-out, interfacial sliding, and matrix crack deflection promote effective energy dissipation and delayed failure, whereas the 35° structure is dominated by matrix-controlled crack deflection, and the 75° structure exhibits severe stress concentration leading to fiber-dominated brittle fracture. These results establish a clear winding-angle-driven structure–failure mapping, providing design-relevant insight into the optimization of filament-wound composite tubular structures subjected to circumferential tensile loading.碳化硅纤维增强碳化硅陶瓷基复合材料（SiCf/SiC CMC）管中的长丝缠绕引入了复杂的三维结构，导致在周向拉伸载荷下产生明显的角度相关力学响应，而潜在的结构破坏关系仍未得到充分的了解。在本研究中，采用多尺度实验和数值相结合的框架，系统地研究了三种典型缠绕角（35°，55°和75°）的长丝缠绕SiCf/SiC复合管。周向拉伸试验显示，机械性能与缠绕角呈非单调依赖关系，55°结构表现出最高的周向强度——分别比35°和75°结构高约12%和57%——以及最大的破坏应变，表明具有优越的载荷传递效率和损伤容忍能力。为了阐明潜在的机制，通过将纱线的三维Hashin失效准则与矩阵的脆性断裂模型耦合，建立了包含重建现实纱线轨迹的有限元模型。仿真结果表明，缠绕角对应力重分布和损伤演化具有重要的控制作用。在55°时，纤维的协同拔出、界面滑动和基体裂纹挠曲促进了有效的能量耗散和延迟破坏，而在35°时，结构以基体控制的裂纹挠曲为主，在75°时，结构表现出严重的应力集中，导致纤维主导的脆性断裂。这些结果建立了一个清晰的缠绕角驱动的结构失效映射，为在周向拉伸载荷下的纤维缠绕复合材料管状结构的优化设计提供了相关的见解。A machine learning-based approach for multi-physics coupling an alysis of laser ablation in carbon fiber reinforced polymer compositesChao Zhang, Jiaxu Li, Yu Zhou, Kai Qiao, Chunjian Mao, Xiwu Xudoi:10.1016/j.compstruct.2026.120311基于机器学习的碳纤维增强聚合物复合材料激光烧蚀多物理场耦合分析方法The increasing use of high-energy laser systems has raised concerns about the ablation resistance of aerospace carbon fiber-reinforced polymer (CFRP) structures. Predicting the response of such materials is challenging because laser irradiation triggers a strongly coupled interaction between heat transfer, thermomechanical deformation, and matrix pyrolysis. In this work, a multi-physics finite element (FE) framework is developed to investigate the ablation behavior of laminated CFRP composites subjected to continuous laser exposure. The model incorporates anisotropic heat conduction, thermally induced stresses, and temperature-dependent pyrolysis rate, enabling the evolution of temperature fields, stress distributions, and interlaminar damage to be examined under different laser power densities and fiber orientations. The simulations indicate that laser power density plays a dominant role in controlling the ablation process, whereas the influence of ply orientation is comparatively limited within the considered parameter range. To accelerate parametric evaluation, surrogate models based on Random Forest (RF) and Multi-Layer Perceptron (MLP) algorithms are constructed using datasets generated from Latin hypercube sampling of the simulations. Once trained, these models reproduce the numerical predictions with high accuracy while reducing the computational time. The proposed framework offers an efficient approach for rapid evaluation of laser-induced damage in CFRP structures and assists in the design of laser-resistant composite components.高能激光系统的日益普及引起了人们对航空航天碳纤维增强聚合物（CFRP）结构抗烧蚀性能的关注。预测这类材料的响应是具有挑战性的，因为激光照射会触发传热、热机械变形和基质热解之间的强耦合相互作用。在这项工作中，开发了一个多物理场有限元（FE）框架来研究叠层CFRP复合材料在连续激光照射下的烧蚀行为。该模型结合了各向异性热传导、热诱导应力和温度相关的热解速率，可以研究不同激光功率密度和纤维取向下温度场、应力分布和层间损伤的演变。仿真结果表明，激光功率密度对烧蚀过程的控制起主导作用，而铺层取向对烧蚀过程的影响在考虑的参数范围内相对有限。为了加速参数评估，基于随机森林（RF）和多层感知器（MLP）算法的代理模型使用模拟的拉丁超立方采样生成的数据集构建。经过训练后，这些模型可以高精度地再现数值预测，同时减少计算时间。所提出的框架为快速评估CFRP结构的激光损伤提供了一种有效的方法，并有助于设计抗激光复合材料部件。Compression-shear mechanical behavior and damage evolution of needled SiC/C-SiC composites under high temperatureQipeng Xu, Ziyang Zhou, Xueling Fan, Jianzheng Xu, Xiaochao Jindoi:10.1016/j.compstruct.2026.120312高温下针 刺SiC/C-SiC复合材料的压剪力学行为及损伤演化Needled SiC/C-SiC composites are quasi-three-dimensional ceramic matrix composites and candidate materials for extreme temperatures. This study conducted compression experiments on needled SiC/C-SiC composites from room temperature to 1300℃ with loading angles from 0° to 90°. High-precision and total-factor geometric information of the composites was obtained using SEM and X-CT, providing basis for establishing the finite element model. A SiC/SiC fiber bundle damage constitutive model based on micro-mechanical an alysis was coupled into the finite element model via ABAQUS UMAT subroutines to simulate the compression-shear process of needled SiC/C-SiC composites, and the simulation and experiment results were compared and ana lyzed. The results show the decrease in temperature and the increase in normal stress enhance the shear strength of needled SiC/C-SiC composites. The length of pull-out SiC fiber decreases with increasing temperature, indicating that high temperature weaken the toughness and strength of needled SiC/C-SiC composites. The finite element model effectively described the damage evolution and stress–strain behavior of needled SiC/C-SiC composites. The short C-fiber layers and needled regions damage, SiC matrix damage, and SiC/SiC fiber bundles damage occurred sequentially with an increase in compressive stress. These modelling methods will serve as a foundation for the design and strength assess ment of ceramic matrix composites.针状SiC/C-SiC复合材料是准三维陶瓷基复合材料，是极端温度的候选材料。本研究对针状SiC/C-SiC复合材料进行了室温~ 1300℃、加载角0°~ 90°的压缩实验。利用扫描电镜和X-CT获得了复合材料的高精度全因子几何信息，为建立有限元模型提供了依据。通过ABAQUS UMAT子程序将基于细观力学分析的SiC/SiC纤维束损伤本构模型与有限元模型耦合，模拟针 刺SiC/C-SiC复合材料的压剪过程，并将模拟结果与实验结果进行对比分析。结果表明：温度的降低和法向应力的增大均提高了针 刺SiC/C-SiC复合材料的抗剪强度；拉出SiC纤维长度随温度升高而减小，表明高温削弱了针 刺SiC/C-SiC复合材料的韧性和强度。该有限元模型有效地描述了针 刺SiC/C-SiC复合材料的损伤演化和应力-应变行为。随着压应力的增大，短c纤维层和针状区损伤、SiC基体损伤和SiC/SiC纤维束损伤依次发生。这些建模方法将为陶瓷基复合材料的设计和强度评估奠定基础。Influence of structure on hydrothermal aging and axial compression behavior of 3D braided FRP composite tubesYanan Ke, Xianyan Wu, Zilun Li, Baozhong Sun, Kai Dongdoi:10.1016/j.compstruct.2026.120314结构对三维编织FRP复合材料管热液老化和轴压性能的影响Three-dimensional(3D)braided fiber-reinforced polymer (FRP) composite tubes are widely utilized in aerospace, marine, and civil engineering applications due to their exceptional mechanical properties, lightweight characteristics, and structural design flexibility. FRP composite tubes may be exposed to harsh long-term hydrothermal environments during their service life. This study investigates the effects of hydrothermal aging on the axial compressive properties and failure mechanis ms. The impact of key braiding structural parameters, including the braiding angles, braiding layers, and axial yarns, on the hydrothermal aging resistance is systematically examined. The result shows that fish-scale-like damage appeared on the inner surface of tubes after hydrothermal aging, and resin peeling and fiber exposure occurred in severe areas. The axial compressive modulus, peak stress and specific absorption energy decrease with aging days. A greater number of braided layers, or the presence of axial yarns result in superior resistance to hydrothermal aging in composite tubes.三维（3D）编织纤维增强聚合物（FRP）复合管由于其优异的机械性能、轻质特性和结构设计的灵活性而广泛应用于航空航天、船舶和土木工程应用。玻璃钢复合材料管在使用寿命期间可能长期暴露在恶劣的水热环境中。研究了水热老化对混凝土轴压性能的影响及其破坏机制。系统考察了编织角度、编织层数、轴向纱等关键编织结构参数对织物耐水热老化性能的影响。结果表明：热液老化后，管材内表面出现鱼鳞状损伤，严重部位出现树脂剥落和纤维暴露；轴向压缩模量、峰值应力和比吸收能随时效天数的增加而降低。较多的编织层数或轴向纱的存在会使复合管具有较好的抗水热老化性能。Lightweight design and manufacturing of thermoplastic composite B-pillar for automotive under drop-weight impactMengdi Li, Lin Sang, Jian Song, Yan Yang, Mingwu Zheng, Wenbin Houdoi:10.1016/j.compstruct.2026.120315落锤冲击下汽车用热塑性复合b柱轻量化设计与制造Carbon fiber-reinforced thermoplastic composites (CFRTP) are increasingly adopted in automotive structures due to their exceptional mechanical properties and lightweight characteristics. However, their application remains largely limited to non-load-bearing components. This study pioneers the application of CFRTP to load-bearing B-pillar structures, integrating layer design, layer sequence optimization, and sample fabrication. Firstly, the finite element an alysis (FEA) model is validated against drop-weight impact tests on metal B-pillar. The initial CFRTP layup demonstrates a 45.3% reduction in deformation and a 71.5% decrease in mass compared to metal B-pillars, while maintaining comparable peak loads. To identify optimal layer sequences for dynamic impact conditions, a conditional generative adversarial network (CGAN) deep learning model is developed for layup optimization. The model successfully generates layering schemes that satisfy physical constraints. The optimized layup sequence is incorporated into the FEA, revealing an approximately 64.25% increase in load-bearing capacity and a 41.1% reduction in deformation compared to the non-optimized CFRTP structure. Finally, CFRTP B-pillars are prepared using the customized hot-pressing mold, and their impact resistance is evaluated through drop-weight impact tests. The results confirm that the optimized CFRTP B-pillars outperform their metal counterparts, demonstrating the feasibility of the proposed design framework and providing a robust methodology for implementing CFRTP in automotive load-bearing structures.碳纤维增强热塑性复合材料（CFRTP）由于其优异的机械性能和轻量化特性，在汽车结构中得到越来越多的应用。然而，它们的应用仍然主要局限于非承重部件。本研究率先将CFRTP应用于承重b柱结构，集层设计、层序优化和样品制作于一体。首先，通过金属b柱落锤冲击试验对有限元分析模型进行了验证。与金属b柱相比，初始CFRTP铺层的变形减少了45.3%，质量减少了71.5%，同时保持了相当的峰值载荷。为了识别动态冲击条件下的最优分层序列，提出了一种条件生成对抗网络（CGAN）深度学习模型进行分层优化。该模型成功地生成了满足物理约束的分层方案。将优化后的铺层序列纳入有限元分析，结果表明，与未优化的CFRTP结构相比，CFRTP结构的承载能力提高了约64.25%，变形减少了41.1%。最后，采用定制的热压模具制备CFRTP b柱，并通过落锤冲击试验对其抗冲击性进行评价。结果证实，优化后的CFRTP b柱优于金属柱，证明了所提出的设计框架的可行性，并为在汽车承重结构中实施CFRTP提供了一种可靠的方法。Computational homogenization and localization for unidirectional piezoelectric nanocomposites with surface piezoelectricityQiang Chen, Henglei Quan, Zhelong Hedoi:10.1016/j.compstruct.2026.120316具有表面压电性的单向压电纳米复合材料的计算均匀化与局部化We present a computational model for the homogenization and localization of nanoporous piezocomposites with energetic surfaces via the finite-volume direct averaging micromechanics (FVDAM). The surface piezoelectricity effect between heterogeneous phases is modelled through a generalized Gurtin-Murdoch (G-M) model, where the jumps of tractions and electric displacements are considered using Young-Laplace equations. The repeating unit cell (RUC) with hexagonal array of cylindrical pores is discretized into quadrilateral subvolumes. Within each subvolume, the displacement and electrical potential fields are approximated using second-order Legendre polynomials. The coupled multiphysics governing equations are enforced in volume-averaged senses, resulting in local stiffness matrix equations. These local equations are then assembled into the global stiffness matrices by enforcing continuity and periodicity of surface-averaged displacements and electric potentials, as well as tractions and electric displacements, across adjacent subvolumes. The effectiveness of the method is verified by comparing homogenized properties with the classical Mori-Tanaka (M−T) method and the finite element method (FEM). Furthermore, the effects of pore volume fractions and radii on the homogenized properties are systematically investigated, and the predicted localized stresses and electric displacement fields are presented. The developed method provides an effective alternative for solving the homogenized properties and localized fields for piezocomposites with surface piezoelectricity.通过有限体积直接平均微力学（FVDAM）方法，建立了含能表面纳米多孔复合材料的均匀化和局部化计算模型。采用广义的Gurtin-Murdoch （G-M）模型来模拟非均相间的表面压电效应，其中牵引力和电位移的跳跃采用Young-Laplace方程来考虑。具有六边形圆柱孔阵列的重复单元胞（RUC）被离散成四边形的子体积。在每个子体内，位移场和电位场使用二阶勒让德多项式近似。耦合的多物理场控制方程在体积平均意义上被强制执行，从而得到局部刚度矩阵方程。然后，这些局部方程通过加强相邻子体积的表面平均位移和电势以及牵引力和电位移的连续性和周期性，组装成全局刚度矩阵。通过与经典的Mori-Tanaka （M−T）法和有限元法（FEM）的均质性比较，验证了该方法的有效性。在此基础上，系统研究了孔隙体积分数和孔隙半径对均匀化性能的影响，并给出了预测的局部应力场和电位移场。该方法为解决具有表面压电性的压电复合材料的均质性和局域场问题提供了一种有效的替代方法。Failure a nalysis of a central crack in one-dimensional hexagonal quasicrystals thin plate via bond-based peridynamicsXia Li, Defeng Kong, Shaonan Lu, Shenghu Ding, Xuefen Zhao, Feng Fengdoi:10.1016/j.compstruct.2026.120317基于键合动力学的一维六方准晶薄板中心裂纹失效分析This paper presents a bond-based peridynamic (BBPD) model with rotational effects, accounting for the phonon-phason coupling to simulate damage evolution in one-dimensional hexagonal quasicrystals (1DHQCs) thin plate with a central crack. The expressions of the microscopic bond potential energy and the pairwise force are derived, from which the micromodulus functions are obtained. Based on these, a bond-based methodology is designed to simulate dynamic crack propagation while mitigating mesh sensitivity. The details are as follows: (i) the equations of motion are discretized; (ii) an explicit time-integration algorithm based on the central difference method is developed; (iii) a mesh adaptive strategy is introduced. Numerical results indicate that the phason field dissipates energy at the crack tip, thereby preventing local energy concentrations and delaying both crack initiation and branching. Furthermore, the reduction of shear stress in the phonon field alters the crack propagation mode from multidirectional branching to a straight path along the loading direction. These findings demonstrate the regulatory role of shear stress on crack morphology. The proposed BBPD method provides a novel pathway for investigating fracture in 1DHQCs, as it naturally captures crack propagation through bond-breaking without requiring a predefined path.本文提出了一种考虑声子-相耦合的、考虑旋转效应的键基周动力学（BBPD）模型，用于模拟具有中心裂纹的一维六边形准晶（1DHQCs）薄板的损伤演化。导出了微观键势能和成对力的表达式，并由此得到了微模量函数。在此基础上，设计了一种基于粘结的方法来模拟动态裂纹扩展，同时降低网格灵敏度。具体步骤如下：(1)对运动方程进行离散化处理；（ii）提出了一种基于中心差分法的显式时间积分算法；(3)引入网格自适应策略。数值结果表明，相场在裂纹尖端处耗散能量，从而阻止了局部能量集中，延缓了裂纹的起裂和分支。此外，声子场剪切应力的减小使裂纹的扩展模式由多向分支转变为沿加载方向的直线扩展。这些发现证明了剪切应力对裂纹形态的调节作用。提出的BBPD方法为研究1dhqc中的裂缝提供了一种新的途径，因为它可以自然地捕获裂缝通过断裂而不需要预定义的路径。An efficient micromechanical framework for elastic and viscoelastic properties prediction of unidirectional continuous fiber-reinforced polymers with microvoidsYuhao Meng, Murilo Augusto Vaz, Marcelo Cairedoi:10.1016/j.compstruct.2026.120307基于微孔的单向连续纤维增强聚合物弹性和粘弹性预测的有效微力学框架Microvoids in unidirectional continuous fiber-reinforced polymers are inevitable defects. While precise RVE-based numerical simulations are computationally prohibitive, existing efficient micromechanical methods lack accuracy in accounting for complex void weakening effects. To bridge this gap, the present study proposes an efficient micromechanical framework (K-BR) based on a two-step homogenization strategy. First, a Kerner-enhanced generalized Maxwell model homogenizes the porous matrix into an ’equivalent matrix’. Subsequently, an extended bridging model, modified by innovative ’volume weakening factors’, combines this ’equivalent matrix’ with fibers, simultaneously considering microvoid content and spatial distribution. The model comprehensively considers temperature, time-dependence, and microvoid characteristics (content and spatial distribution) to predict equivalent elastic and viscoelastic properties. Validation against existing models and finite element simulations confirms the framework’s superior accuracy: for fiber volume fractions of 20–60% and porosity below 10%, its average absolute relative error is approximately 3.9%. These results establish the K-BR framework as a high-fidelity and efficient alternative to computationally intensive numerical simulations. Moreover, this contribution deepens the physical understanding of microstructural interactions and has the potential to provide guidance for future model extensions and the optimal design of composite materials.单向连续纤维增强聚合物中的微孔是不可避免的缺陷。虽然基于rve的精确数值模拟在计算上是不可行的，但现有的高效微力学方法在考虑复杂的空洞弱化效应方面缺乏准确性。为了弥补这一差距，本研究提出了一种基于两步均质化策略的有效微机械框架（K-BR）。首先，kerner增强广义Maxwell模型将多孔矩阵均匀化为“等效矩阵”。随后，通过创新的“体积弱化因子”修改的扩展桥接模型将这种“等效基质”与纤维结合起来，同时考虑微孔隙含量和空间分布。该模型综合考虑温度、时间依赖性和微孔隙特征（含量和空间分布）来预测等效弹性和粘弹性特性。对现有模型和有限元模拟的验证证实了该框架的优越精度：对于纤维体积分数为20-60%，孔隙率低于10%的情况，其平均绝对相对误差约为3.9%。这些结果建立了K-BR框架作为一个高保真和高效的替代计算密集型数值模拟。此外，这一贡献加深了对微观结构相互作用的物理理解，并有可能为未来的模型扩展和复合材料的优化设计提供指导。Composites Part A: Applied Science and ManufacturingMultiscale an alysis of low-velocity impact performance and damage mechanis m of CFRP double-bolted jointsLixiao Chen, Jianjie Lin, Qiang Xu, Mengze Li, Weidong Zhu, Yinglin Kedoi:10.1016/j.compositesa.2026.109792CFRP双螺栓连接低速冲击性能及损伤机理多尺度分析Owing to the limitations of single-scale modeling in predicting the impact response of composite bolted joints, this work proposes a bottom-up multiscale an alysis strategy. Equivalent material parameters derived from the microscale model are transferred to the macroscale model of joints. The established model is validated by 50J low-velocity impact tests, with numerical results showing good agreement with experimental data. Results indicate that the joint’s impact response reflects the coupling effect of dynamic load distribution, energy conversion and progressive damage. Specifically, a four-peak decreasing contact force–time curve and staged energy conversion process are observed. Under 50J impact energy, joint damage exhibits significant asymmetry, mainly concentrating in the single-side bolt area, characterized by interlaminar delamination and transverse fiber fracture bands passing through the hole. The single-bolt dominant load-bearing mode originates from the coupling of joint bending deformation and bolt-hole wall contact state. And the quasi-isotropic layup joint outperforms the cross-ply layup joint in impact resistance. This multiscale method provides a reliable numerical tool for impact resistance optimization design and damage assess ment of composite structures.由于单尺度建模在预测复合材料螺栓连接的冲击响应方面存在局限性，本文提出了一种自下而上的多尺度分析策略。将从微观模型中得到的等效材料参数转化为宏观节点模型。通过50J低速冲击试验对所建立的模型进行了验证，数值结果与实验数据吻合较好。结果表明，节点的冲击响应反映了动载荷分布、能量转换和渐进损伤的耦合效应。具体而言，观察到四峰接触力-时间递减曲线和分阶段能量转换过程。50J冲击能量下，节理损伤表现出明显的不对称性，主要集中在单侧锚杆区域，表现为层间分层，纤维断裂带横向穿过孔。单螺栓主导承载模式源于节点弯曲变形与螺栓-孔壁接触状态的耦合。准各向同性铺层接缝的抗冲击性能优于交叉铺层接缝。该多尺度方法为复合材料结构抗冲击优化设计和损伤评估提供了可靠的数值工具。Deep learning surrogates for resin impregnation of 3D preforms with complex geometry and non-uniform material propertiesS. Yan, M.Y. Matveev, M.E. Causon, A. Endruweit, M.A. Iglesias, M.V. Tretyakovdoi:10.1016/j.compositesa.2026.109783深度学习替代树脂浸渍具有复杂几何形状和不均匀材料性质的3D预成型The production of large, integrated aerospace structures employing Resin Transfer Moulding (RTM) is facilitated by high-fidelity simulations to predict resin flow behaviour in the presence of race tracking and permeability variations. Conventional physics-based RTM simulations are computationally expensive, which constrains real-time monitoring and digital twin deployment. Advances in machine learning and data assimilation enable accurate and fast surrogate models to aid the creation of digital twins for composite manufacturing. This paper presents a Recurrent Neural Network (RNN) surrogate for RTM simulation applied to a realistic 3D RTM geometry. The RNN surrogate approximates pressure–time curves more accurately than surrogates with alternative architectures and achieved a mean error in predicted fluid pressure below 400 Pa. The surrogate is employed within a Bayesian inversion framework to infer local reinforcement permeabilities from synthetic pressure data. Owing to the fast surrogate, updating local permeabilities based on pressure data required only 0.77 s on average. The presented surrogate and inversion framework provide the speed and accuracy required for near real-time applications such as accelerated post-process non-destructive evaluation and active process control.采用树脂传递成型（RTM）技术的大型集成航空航天结构的生产，通过高保真度模拟来预测在赛道跟踪和渗透率变化情况下树脂的流动行为。传统的基于物理的RTM模拟在计算上很昂贵，这限制了实时监控和数字孪生的部署。机器学习和数据同化的进步使替代模型能够准确、快速地帮助创建复合材料制造的数字孪生。 本文提出了一种用于RTM仿真的递归神经网络（RNN）代理，并将其应用于真实的三维RTM几何。RNN代替物比替代结构代替物更准确地接近压力-时间曲线，并且在预测流体压力低于400 Pa时实现了平均误差。该方法在贝叶斯反演框架内使用，从合成压力数据推断局部钢筋渗透率。由于采用了快速替代方法，基于压力数据更新局部渗透率平均只需0.77 s。所提出的替代和反演框架提供了近乎实时应用所需的速度和精度，例如加速后处理无损评估和主动过程控制。Experimental characterization of mode-II interlaminar fracture and damage arrestment in geometrically scaled stitched resin-infused compositesHan-Gyu Kim, Allison J. White, Wayne Huberty, Christopher Boundsdoi:10.1016/j.compositesa.2026.109786几何尺度缝合树脂注入复合材料ii型层间断裂与损伤止损的实验表征This study investigates the effectiveness of through-thickness chain stitching in enhancing mode-II interlaminar fracture resistance in carbon fiber/epoxy resin-infused composites. Quasi-isotropic end-notched flexure specimens were fabricated using SAERTEX Class-75 ± 45 ° non-crimp carbon-fiber fabrics and API 1078 epoxy via vacuum-assisted resin transfer molding, with matched stitched/unstitched configurations geometrically scaled at three levels. A combined global-local damage an alysis framework was developed, comprising load–displacement characterization, size effect-based fracture energy an alysis using a novel equivalent load conversion for quasi-isotropic layups, and through-thickness separation measurements based on digital image correlation. The unstitched specimens exhibited pseudo-ductile behavior with 28.2% higher fracture energy than a unidirectional prepreg baseline but significantly s maller effective fracture process zone size, indicating more brittle behavior. Through-thickness stitching did not affect pre-peak response but provided substantial post-peak enhancement: load drops were reduced by 43%–95%, effective fracture energy increased by 39.7%, and effective fracture process zone size increased nearly four-fold, shifting failure toward ductile behavior. Separation values at final snapdown increased by 52%–111%, demonstrating that stitch bridging enables further cohesive zone development. This work establishes an experimental framework for evaluating stitching effectiveness under mode-II loading and contributes to damage-tolerant composite designs for high-speed aircraft.研究了通过厚度链拼接提高碳纤维/环氧树脂注入复合材料ii型层间抗断裂性能的有效性。采用SAERTEX Class-75±45°无卷曲碳纤维织物和API 1078环氧树脂，通过真空辅助树脂转移模塑制备准各向同性端缺口弯曲试件，并按几何比例在三个水平上匹配缝合/未缝合配置。开发了一个综合的整体-局部损伤分析框架，包括载荷-位移表征、基于尺寸效应的断裂能分析（使用一种新的准各向同性铺层等效载荷转换），以及基于数字图像相关的穿透厚度分离测量。与单向预浸料相比，未缝合试样的断裂能提高28.2%，但有效断裂过程区尺寸明显减小，显示出更强的脆性行为。通过厚度拼接不影响峰前响应，但提供了显著的峰后增强：载荷下降减少了43%-95%，有效断裂能增加了39.7%，有效断裂过程区大小增加了近4倍，将破坏转向延性行为。最终snapdown的分离值增加了52%-111%，表明缝线桥接促进了进一步的内聚区发展。该研究为ii型载荷下的拼接效果评估建立了一个实验框架，为高速飞机的损伤容忍复合材料设计做出了贡献。Non-equilibrium thermodynamics-induced in situ construction of SiCNWs-CA heterointerfaces for augmented electromagnetic wave absorptionYulong Chen, Ruibin Li, Liangliang Cao, Qichao Chen, Liheng Zhang, Xiankun Kuai, Li Yin, Binbin Lidoi:10.1016/j.compositesa.2026.109791非平衡热力学诱导的SiCNWs-CA异质界面的原位构建增强电磁波吸收Carbon aerogel (CA) injects new vitality into aerospace electromagnetic wave absorption (EWA) materials, thanks to its superior dielectric loss, excellent stability and low density. However, due to impedance mis match and a single loss mechanis m, CA struggles to achieve the reflection loss (RL) and effective absorption bandwidth (EAB) required for high-performance EWA materials. Constructing heterointerfaces is regarded as an effective approach to address the aforementioned issues. In this study, silicon carbide nanowires (SiCNWs) with a bent structure and wire-sphere morphology were in situ grown in CA via non-equilibrium thermodynamics induction, forming SiCNWs-CA heterointerfaces. Benefiting from the special morphology of the heterointerfaces and the loss mechanis m dominated by interfacial polarization, the composite exhibits excellent EWA performance synergistically. The as-synthesized composite achieves a minimum reflection loss (RLmin) of −52.1 dB and an effective absorption bandwidth (EAB) of 4.67 GHz. When the detection angle is 60°, the maximum reduction in radar cross section (RCS) reaches 24.53 dB·m2. In addition, the composite exhibited excellent thermal insulation performance, with a surface temperature of only 54.8 °C after being heated at 150 °C for 20 min. Overall, this work pioneers a new strategy for the in situ construction of heterointerfaces in multifunctional carbon-based EWA materials.碳气凝胶（CA）以其优越的介电损耗、优异的稳定性和低密度等特点，为航空航天电磁波吸收（EWA）材料注入了新的活力。然而，由于阻抗失配和单一损耗机制，CA难以达到高性能EWA材料所需的反射损耗（RL）和有效吸收带宽（EAB）。构造异构接口被认为是解决上述问题的有效途径。在本研究中，通过非平衡热力学感应，将具有弯曲结构和线球形态的碳化硅纳米线（SiCNWs）在CA中原位生长，形成SiCNWs-CA异质界面。得益于异质界面的特殊形态和以界面极化为主的损耗机制，复合材料协同表现出优异的EWA性能。该复合材料的最小反射损耗（RLmin）为- 52.1 dB，有效吸收带宽（EAB）为4.67 GHz。当探测角为60°时，雷达截面（RCS）的最大降幅可达24.53 dB·m2。此外，复合材料表现出优异的保温性能，在150℃下加热20 min后，表面温度仅为54.8℃。总的来说，这项工作开创了在多功能碳基EWA材料中原位构建异质界面的新策略。Influence of polar and dispersive liquid-fiber interactions on the saturated and unsaturated in-plane permeability of a basalt fabricRomain Ravel, Monica Francesca Pucci, Rami Alawar, Pierre-Jacques Liotierdoi:10.1016/j.compositesa.2026.109793极性和色散液-纤维相互作用对玄武岩结构面内饱和和非饱和渗透率的影响This study evaluates the influence of the liquid properties as well as liquid-fiber interactions on saturated ( K s a t ) and unsaturated ( K u n s a t ) permeability of a basalt fabric preform. Four test liquids (water, polyethylene glycol, silicone oil and epoxy resin) and two surface natures of fabric (silane based sized and desized) were investigated. The surface properties of silane based and desized basalt fabrics were studied in a previous work. Firstly, the surface and rheological properties of test liquids were characterized. Secondly, saturated and unsaturated in-plane permeability experiments were performed with a pressure difference of 100 kPa. Finally, the capillary pressure Δ P γ , estimated from the ratio K u n s a t / K s a t , was related to the ratio between viscous effects and capillary effects and the work of spreading, aiming at improving the understanding of the flow behaviour differences observed. Since the velocity is not constant in permeability experiments with an imposed pressure, the modified capillary number ( C a ∗ ) is not reliable with these process conditions. Consequently, this ratio was studied without the fluid velocity. The obtained results indicate that, in this study conditions, not only the liquid nature and the fiber surface properties affect the saturated and unsaturated permeability results, but the liquid-fiber interactions must be considered.本研究评估了液体性质以及液-纤维相互作用对玄武岩织物预制体的饱和（k_s at）和不饱和（k_u nsat）渗透率的影响。研究了四种测试液体（水、聚乙二醇、硅油和环氧树脂）和织物的两种表面性质（硅烷基浆料和浆料）。前人研究了硅烷基玄武岩浆料织物的表面性能。首先，对测试液体的表面和流变性能进行了表征。其次，在压力差为100 kPa的条件下，进行了饱和和非饱和平面内渗透率实验。最后，毛细管压力Δ P γ，由ku n s at / ks at的比值估计，与粘性效应和毛细管效应之间的比值以及扩散功有关，旨在提高对所观察到的流动行为差异的理解。由于在施加压力的渗透率实验中速度不是恒定的，因此修正毛细数（C a *）在这些过程条件下是不可靠的。因此，在不考虑流体速度的情况下研究了该比率。所得结果表明，在本研究条件下，不仅液体性质和纤维表面性质会影响饱和和不饱和渗透率结果，还必须考虑液-纤维相互作用。Interface engineering of MXene composites: enhancing interfacial adhesion and multiscale behavior mechanis msZhongwen Hu, Tiantian Wang, Jinsong Yang, Buzhao Niu, Chang Pengdoi:10.1016/j.compositesa.2026.109794 MXene复合材料的界面工程：增强界面附着力和多尺度行为机制The interfacial properties of carbon fiber reinforced polymer composites (CFRPs) are a critical bottleneck that limits their performance and range of applications. This study developed a scalable green electrodeposition strategy to coat MXene nanosheets onto carbon fiber (CF) surfaces, thereby enhancing the interfacial and mechanical properties of composites. Experiments and multiscale simulations demonstrate that MXene nanoparticles significantly increase fiber surface energy, wettability, and roughness, thereby strengthening the fiber–matrix interface bond. Compared to unmodified composites, MXene-functionalized continuous carbon fiber composites exhibit a 35.7% increase in interfacial strength and a 90.6% improvement in fracture toughness. This performance improvement primarily stems from the formation of a nanoscale network structure. This structure enhances stress transfer efficiency and energy dissipation through hydrogen bond absorption, strengthens mechanical interlocking between fibers and resin, and amplifies the synergistic effect of hydrogen bonds and van der Waals forces. Molecular dynamics (MD) and finite element simulations reveal how the molecular structure of surface-modified carbon fibers regulates interfacial properties, confirming that enhanced interfacial strength improves stress transfer efficiency and mitigates damage caused by localized stress concentration. This approach offers a promising pathway to elevate the performance of carbon fiber composites and accelerate the development and adoption of advanced composite materials.碳纤维增强聚合物复合材料（CFRPs）的界面性能是制约其性能和应用范围的关键瓶颈。本研究开发了一种可扩展的绿色电沉积策略，将MXene纳米片涂覆在碳纤维（CF）表面，从而增强复合材料的界面和机械性能。实验和多尺度模拟表明，MXene纳米颗粒显著提高了纤维的表面能、润湿性和粗糙度，从而增强了纤维-基质界面的结合。与未改性复合材料相比，mxene功能化连续碳纤维复合材料的界面强度提高了35.7%，断裂韧性提高了90.6%。这种性能改进主要源于纳米级网络结构的形成。这种结构通过吸收氢键提高了应力传递效率和能量耗散，加强了纤维和树脂之间的机械联锁，放大了氢键和范德华力的协同效应。分子动力学（MD）和有限元模拟揭示了表面改性碳纤维的分子结构如何调节界面性能，证实了界面强度的增强提高了应力传递效率，减轻了局部应力集中造成的损伤。 这种方法为提高碳纤维复合材料的性能和加速先进复合材料的开发和采用提供了一条有希望的途径。Effect of atmospheric pressure air and Ar plas ma treatment for enhanced adhesion of arc-sprayed zinc coatings on CFRP substratesSanjaya Kumar Pradhan, Ho-Eon Sung, Lee Jong Kweon, Jinhyeok Kang, Changwoo Nam, Eui-Pyo Kwon, Min-Suk Ohdoi:10.1016/j.compositesa.2026.109797 大气压、空气和氩等离子体处理对CFRP基板电弧喷涂锌涂层附着力的影响Surface metallization of carbon-fiber-reinforced polymer (CFRP) is increasingly required for multifunctional lightweight structures, yet achieving strong adhesion between metallic coatings and polymer-based composites remains a critical challenge due to low surface energy and surface contamination. This study addresses this challenge by systematically investigating atmospheric pressure air and argon plas ma treatments (APPT) as an environmentally friendly and scalable surface-activation strategy to enhance bonding between CFRP substrates and arc-sprayed Zn coatings. Comprehensive characterizations, including SEM, AFM, 3D profilometry, contact angle/surface energy an alysis, FTIR, and XPS a nalysis revealed that APPT did not significantly alter microscale roughness but critically transformed surface chemistry. The results showed that argon plas ma ablated surface epoxy layer, led to increased surface energy with exposed carbon fibers (CFs). This facilitates direct mechanical interlocking between the exposed CFs and the incoming Zn, resulting in enhanced adhesion. Air plas ma produced a dual effect by additionally generating oxygen-rich functional groups (–COOH, –OH), thereby enabling hydrogen bonding with ZnO species and markedly increasing polar surface energy (72.08 mJ/m2). Pull-off adhesion strength improved substantially for both plas ma-treated CFRP, reaching a maximum of 4.21 ± 0.12 MPa for the most intense air plas ma-treated CFRP, representing an 84% increase over untreated CFRP. Failure mode shifted from adhesive to predominantly cohesive, and CZM simulation confirmed enhanced interfacial adhesion and delamination resistance. Overall, APPT, especially, air plas ma provides an effective and industrially viable route for activating CFRP surfaces and achieving robust CFRP/Zn bonding for advanced composite–metal systems.多功能轻量化结构对碳纤维增强聚合物（CFRP）表面金属化的要求越来越高，但由于表面能低和表面污染，金属涂层与聚合物基复合材料之间的强附着力仍然是一个关键挑战。本研究通过系统地研究大气压空气和氩气等离子体处理（APPT）作为一种环保且可扩展的表面活化策略来增强CFRP基材与电弧喷涂Zn涂层之间的结合，从而解决了这一挑战。综合表征，包括SEM， AFM， 3D轮廓分析，接触角/表面能分析，FTIR和XPS分析表明，APPT没有显著改变微观尺度的粗糙度，但关键地改变了表面化学。结果表明，氩气等离子体烧蚀表面环氧树脂层，使暴露碳纤维的表面能增加。这有利于直接机械联锁之间的暴露的碳纤维和传入的锌，从而提高附着力。空气等离子体通过额外生成富氧官能团（-COOH, -OH）产生双重效应，从而使氧化锌与氢键结合，并显著提高极性表面能（72.08 mJ/m2）。两种等离子体处理的CFRP的拉脱粘接强度都得到了显著提高，强度最大的等离子体处理CFRP的拉脱粘接强度达到4.21 ± 0.12 MPa，比未经处理的CFRP提高了84%。破坏模式由粘结为主转变为粘结为主，CZM模拟证实界面黏附和抗脱层能力增强。总的来说，APPT，特别是空气等离子体，为激活CFRP表面提供了一种有效的、工业上可行的途径，并为先进的复合金属系统实现了强大的CFRP/Zn结合。Achieving synergistically elevated strength and thermal conductivity in Cu-Cr-Zr/carbon fiber composites by constructing Cu/ZrC/Cr3C2/C heterointerfacesHanyu Cai, Sangsang He, Wenting Qiu, Yuqi Zhang, Ao Xun, Yanlin Huang, Jiaxin Peng, Shen Gongdoi:10.1016/j.compositesa.2026.109798通过构建Cu/ZrC/Cr3C2/C异质界面，协同提高Cu- cr - zr /碳纤维复合材料的强度和导热系数In Cu-Cr/C composites, the exceptionally high Cr-C reactivity rapidly depletes Cr from the Cu matrix, leaving an insufficient supply of solute Cr atoms for subsequent precipitation. This renders synergistic enhancement of thermal conductivity and strength in Cu-Cr/C composites a significant challenge. This study achieves both interfacial modification and precipitation of Cr precipitates by constructing Cu/ZrC/Cr3C2/C heterointerfaces within the Cu-Cr/C composites. Consequently, a high-strength, high-thermal-conductivity Cu-0.5Cr-2Zr (wt.%)/20 vol% carbon fiber composite is successfully fabricated. After undergoing “solution-aging” treatment, the composite exhibits flexural strength of 672 MPa and thermal conductivity of 529 W m−1 K−1, representing increase of 466 MPa and 97 W m−1 K−1 compared to the Cu-0.5Cr (wt.%)/20 vol% carbon fiber composite without added Zr. Within Cu/ZrC/Cr3C2/C heterointerfaces, ZrC transitional layers completely envelop Cr3C2 transitional layers, thereby inhibiting the complete reaction between Cr and C. This encapsulation facilitates Cr solute atoms within the Cu matrix to precipitate during aging, which significantly enhances the composite’s strength. Concurrently, the development of Cu/ZrC/Cr3C2/C heterointerfaces markedly diminishes interfacial thermal resistance of Cu/C interfaces. Moreover, enhanced interfacial affinity between Cu and C facilitates the construction of carbon fiber networks within the Cu matrix. These factors impart exceptional thermal conductivity to the composite.在Cu-Cr/C复合材料中，异常高的Cr-C反应性迅速耗尽Cu基体中的Cr，导致随后沉淀的溶质Cr原子供应不足。这使得协同增强Cu-Cr/C复合材料的导热性和强度成为一个重大挑战。本研究通过在Cu-Cr/C复合材料内部构建Cu/ZrC/Cr3C2/C异质界面，实现了界面改性和Cr析出相的析出。因此，成功制备了高强度、高导热性Cu-0.5Cr-2Zr (wt.%)/20 vol%的碳纤维复合材料。经固溶时效处理后，复合材料的抗弯强度为672 MPa，导热系数为529 W m−1 K−1，与未添加Zr的Cu-0.5Cr (wt.%)/20 vol%碳纤维复合材料相比，分别提高了466 MPa和97 W m−1 K−1。在Cu/ZrC/Cr3C2/C异质界面内，ZrC过渡层完全包裹Cr3C2过渡层，从而抑制了Cr与C的完全反应。这种包裹有利于Cu基体内的Cr溶质原子在时效过程中析出，显著提高了复合材料的强度。同时Cu/ZrC/Cr3C2/C异质界面的形成显著降低了Cu/C界面的热阻。此外，Cu和C之间的界面亲和力增强有助于在Cu基体内构建碳纤维网络。这些因素使复合材料具有优异的导热性。From physics-based to data-driven approaches: A review of modelling paradigms for curing in composite structuresYing Deng, Changrong Dong, Han Cao, Yonglin Chen, Yinbo Zhao, Weidong Yang, Jie Zhi, Yan Lidoi:10.1016/j.compositesa.2026.109799从基于物理到数据驱动的方法：复合材料结构固化的建模范式综述The curing process of composites dictates the matrix-dominated properties and residual stress state, and ultimately affects their performance and service life. However, the accurate prediction and control of this process remain challenging due to its inherent multiscale, thermo-chemo-mechanical complexity. Despite the development of diverse modelling paradigms, ranging from physics-based to data-driven approaches, a systematic review of this field is still lacking. In this study, we first examine the an alytical solutions and coupled multiphysics finite element an alysis. Subsequently, We evaluate multiscale techniques for deformation and stress prediction, followed by an assess ment of emerging data-driven approaches. By systematically deconstructing the capabilities and limitations of each paradigm, this work provides a coherent framework for understanding their complementary roles. The synthesis offers perspectives on the integration of diverse modeling paradigms, with an emphasis on pathways toward more accurate, efficient, and robust modeling of composite cure processing.复合材料的固化过程决定了复合材料的基体主导性能和残余应力状态，最终影响复合材料的性能和使用寿命。然而，由于其固有的多尺度、热化学和机械复杂性，对这一过程的准确预测和控制仍然具有挑战性。尽管发展了多种建模范式，从基于物理的方法到数据驱动的方法，但对这一领域的系统回顾仍然缺乏。在本研究中，我们首先研究了解析解和耦合多物理场有限元分析。随后，我们评估了变形和应力预测的多尺度技术，随后评估了新兴的数据驱动方法。通过系统地解构每个范式的能力和局限性，这项工作为理解它们的互补作用提供了一个连贯的框架。综合提供了不同建模范式集成的观点，重点是通向更准确、更有效和更健壮的复合固化过程建模的途径。Composites Part B: EngineeringData-Driven An alysis of Heterogeneity Effects on Carbon Fiber/Epoxy Interfaces Using Molecular Dynamics and Machine LearningJiachen Zhang, Jing Han, Liwei Wu, Li Chen, Qian Jiangdoi:10.1016/j.composites b.2026.113667 基于分子动力学和机器学习的碳纤维/环氧树脂界面非均质性分析The interfacial properties of carbon fiber/epoxy composites are inherently influenced by their heterogeneous microstructure. However, quantitatively linking specific heterogeneity parameters to interfacial behavior has been difficult using experimental approaches. To address this, we present a data-driven framework that combines Latin hypercube sampling (LHS), molecular dynamics (MD) simulations, and machine learning. Fifty atomistic interface models with systematically varied heterogeneity were built using LHS. From MD simulations, five interfacial features were extracted. These results show that mechanical properties and interfacial density respond noticeably to heterogeneity, with coefficients of variation (CV) exceeding 10%. In contrast, the interfacial contact area remained relatively stable, showing only a 2% CV. Principal component an alysis condensed the five features into two main dimensions: interfacial contact density and interfacial fracture resistance, together explaining 86.78% of the total variance. A generalized additive model was then developed, successfully mapping heterogeneity parameters to these two dimensions with good predictive accuracy (validation R2 > 0.8). The model indicates that interfacial contact density depends mainly on carbon fiber vacancy site density, following an almost linear negative trend. Interfacial fracture resistance, however, is nonlinearly and positively influenced by epoxy cross-linking density. Using this model, dense sampling across the heterogeneity parameter space revealed a complete topography of interfacial state space. Cluster an alysis identified four typical states, each with distinct atomic packing densities and failure mechanis ms. This study offers a new perspective and a theoretical basis for designing high-performance composite interfaces.碳纤维/环氧复合材料的界面性能受到其非均相微观结构的内在影响。然而，使用实验方法定量地将特定的非均质参数与界面行为联系起来是困难的。为了解决这个问题，我们提出了一个数据驱动的框架，该框架结合了拉丁超立方体采样（LHS）、分子动力学（MD）模拟和机器学习。利用LHS建立了50个具有系统变化异质性的原子界面模型。从MD模拟中提取了5个界面特征。结果表明，合金的力学性能和界面密度对非均质性有显著响应，变异系数（CV）均大于10%。相比之下，界面接触面积保持相对稳定，只有2%的CV。主成分分析将五个特征浓缩为两个主要维度：界面接触密度和界面断裂阻力，共同解释了总方差的86.78%。然后建立了一个广义的加性模型，成功地将异质性参数映射到这两个维度，并具有良好的预测精度（验证R2 > 0.8）。模型表明，界面接触密度主要取决于碳纤维空位位密度，且几乎呈线性负变化趋势。然而，界面抗断裂能力是非线性的，并受到环氧交联密度的积极影响。利用该模型，在非均质参数空间上进行密集采样，揭示了界面状态空间的完整形貌。聚类分析确定了四种典型状态，每种状态都有不同的原子堆积密度和失效机制。该研究为高性能复合接口的设计提供了新的视角和理论基础。Composites Science and TechnologyMulti-physics coupled prediction method for the interlaminar performance of thermoplastic composites considering manufacturing-induced residual stressesJiezheng Qiu, Zhonghai Xu, Chunxing Hu, Chaocan Cai, Qingyu Peng, Xiaodong Hedoi:10.1016/j.compscitech.2026.111615 考虑制造残余应力的热塑性复合材料层间性能多物理场耦合预测方法Thermoplastic composites exhibit high specific strength, weldability and re-formability, which gives them substantial engineering application potential in aerospace and related fields. However, existing studies mainly focus on the influence of processing parameters on crystallization behavior and mechanical performance, while the systematic role of manufacturing-induced residual stresses in governing interlaminar load-carrying capacity and failure modes has been largely overlooked, which prevents an accurate assess ment of the structural performance. In this study, a multi-physics coupled prediction method was developed, in which manufacturing-induced residual stresses were explicitly considered based on a crystallization kinetics model and a traction–separation failure criterion. The method was able to effectively describe the interlaminar damage evolution and failure behavior of thermoplastic composites under the action of residual stresses, which was validated by experimental results. The results showed that, when manufacturing-induced residual stresses were included, the relative prediction error of the peak load was reduced by about 60% compared with the case without residual stresses. Furthermore, the study clarified the internal links among the crystallization process, cooling conditions, residual stress field, and interlaminar strength. These findings were of practical significance for forming-process optimization and structural design of thermoplastic composite components.热塑性复合材料具有高比强度、可焊性和可再成形性，在航空航天及相关领域具有巨大的工程应用潜力。然而，现有的研究主要集中在工艺参数对结晶行为和力学性能的影响上，而制造诱导的残余应力在控制层间承载能力和破坏模式方面的系统作用在很大程度上被忽视了，这阻碍了对结构性能的准确评估。本文提出了一种基于结晶动力学模型和牵引分离失效准则明确考虑制造残余应力的多物理场耦合预测方法。该方法能够有效描述残余应力作用下热塑性复合材料层间损伤演化和破坏行为，实验结果验证了该方法的有效性。结果表明，当考虑制造残余应力时，峰值载荷的相对预测误差比不考虑残余应力时降低了约60%。进一步阐明了结晶过程、冷却条件、残余应力场与层间强度之间的内在联系。研究结果对热塑性复合材料零件的成形工艺优化和结构设计具有实际意义。来源：复合材料力学仿真Composites FEM
