【新文速递】2026年5月26日复合材料SCI期刊最新文章

今日更新：Composite Structures 3 篇，Composites Part A: Applied Science and Manufacturing 2 篇，Composites Part B: Engineering 5 篇

Composite Structures

High-resolution ultrasonic study of the effect of damage distribution in carbon fiber laminates subjected to low-velocity impact on residual compressive strength

Egor S. Morokov, Alexander Eremin, Mikhail Burkov, Irina Zhiltsova

doi:10.1016/j.compstruct.2026.120500

低速冲击下碳纤维层合板损伤分布对残余抗压强度影响的高分辨率超声研究

Carbon fiber reinforced polymer (CFRP) laminates are highly susceptible to internal delaminations caused by low-velocity impact (LVI), Although such damage often exhibits minimal surface visibility, extensive internal delaminations significantly compromise structural integrity, particularly under compressive loading. This study investigates the relationship between the three-dimensional distribution of impact-induced damage and the residual compressive strength of thick quasi-isotropic CFRP laminates. In the experiments, two material systems were examined: one fabricated from biaxial fabric and the other from unidirectional prepreg. Specimens were subjected to LVI at energies of 10, 20, and 30 J, followed by compression-after-impact (CAI) testing per ASTM D7137. High-resolution acoustic microscopy (50 MHz) enabled layer-by-layer visualization of delamination morphology and through-thickness distribution after LVI, while digital image correlation (DIC) captured strain localization during compression. Ultrasonic results revealed that while the projected damage area correlates broadly with impact energy, the total volumetric damage area— and, more critically, the location and layer-wise sequence of delaminations — determines residual strength. Layer-by-layer ultrasound images revealed distinct damage morphologies between the prepreg and biaxial laminates. Laminates manufactured from biaxial fabric exhibited higher residual compressive strength than their prepreg counterparts at equivalent impact energies; a result attributed to fiber stitching that limits near-surface delaminations and promotes more centralized damage. DIC an alysis confirmed that strain concentrations develop preferentially above larger or asymmetrically located delaminations, ultimately triggering buckling and failure. This work underscores the necessity of volumetric, layer-resolved damage characterization — rather than relying solely on projected damage area — for the accurate prediction of residual strength of impact-damaged CFRP laminates.

碳纤维增强聚合物（CFRP）层压板极易受到低速撞击（LVI）引起的内部分层的影响，尽管这种损伤通常表现为极小的表面可见性，但广泛的内部分层会严重损害结构完整性，特别是在压缩载荷下。研究了厚层准各向同性CFRP复合材料的三维冲击损伤分布与残余抗压强度之间的关系。在实验中，研究了两种材料体系：一种是由双轴织物制成的，另一种是由单向预浸料制成的。试件在10、20和30 J的能量下进行LVI，然后按照ASTM D7137进行冲击后压缩（CAI）测试。高分辨率声学显微镜（50 MHz）实现了LVI后分层形态和通厚分布的逐层可视化，而数字图像相关（DIC）捕获了压缩过程中的应变局部化。超声结果显示，虽然预计损伤面积与冲击能量密切相关，但总的体积损伤面积——更重要的是，分层的位置和分层顺序——决定了残余强度。逐层超声图像显示，预浸料和双轴层压板之间存在明显的损伤形态。在相同的冲击能量下，由双轴织物制成的层压板比预浸料具有更高的残余抗压强度；这一结果归因于纤维拼接，它限制了近表面的分层，并促进了更集中的损伤。DIC分析证实，应变浓度优先在较大或不对称位置的分层上发展，最终引发屈曲和破坏。这项工作强调了体积、层分解损伤表征的必要性，而不是仅仅依赖于预测损伤区域，以准确预测撞击损伤的CFRP层压板的剩余强度。

Shear-bending interaction in textile composite reinforcements during forming: Experimental characterisation and modelling insights

Théo Perrin, Gilles Arnold, Karine Buet Gautier, Michel Tourlonias, Peng Wang

doi:10.1016/j.compstruct.2026.120499

纺织复合材料增强材料在成形过程中的剪切-弯曲相互作用：实验表征和建模见解

This study examines the interaction between in-plane shear and bending in flax/PA12 commingled textile reinforcements during forming. Although these deformation modes are often treated as independent in simulations, their interaction is closely related to the onset of wrinkling. A modified experimental approach based on the Kawabata Evaluation System (KES-FB2) was developed to perform bending tests on pre-sheared specimens. This method allows the respective contributions of yarns and sheared fabric regions to be distinguished. A normalisation framework accounting for shear-induced geometric changes was also introduced. The results show that the apparent bending stiffness increases with shear angle. This increase is mainly attributed to yarn reorientation and associated torsional effects, rather than structural locking of the fabric. The evolution is approximately linear up to the locking angle. An improved Dahl-based model is proposed to reproduce the nonlinear and hysteretic bending response, providing better agreement with experiments than the classical Gros berg model. The findings clarify the origin of the apparent shear-bending coupling and support the use of decoupled energy contributions in forming simulations. This work contributes to improving the prediction of wrinkling defects in textile composite forming.

研究了亚麻/PA12混纺增强材料在成型过程中的面内剪切与弯曲的相互作用。虽然这些变形模式在模拟中通常被视为独立的，但它们的相互作用与起皱的发生密切相关。提出了一种基于川端评价系统（KES-FB2）的改进试验方法，对预剪试件进行弯曲试验。这种方法可以区分纱线和剪切织物区域各自的贡献。还介绍了一个考虑剪切引起的几何变化的归一化框架。结果表明，随着剪切角的增加，表观抗弯刚度增大。这种增加主要是由于纱线重新定向和相关的扭转效应，而不是织物的结构锁定。在锁定角度之前，演化近似为线性。提出了一种改进的dahl模型来再现非线性和滞后弯曲响应，与经典的Gros berg模型相比，该模型与实验结果更加吻合。研究结果澄清了明显的剪切-弯曲耦合的起源，并支持在成形模拟中使用解耦的能量贡献。这项工作有助于提高纺织复合材料成形中起皱缺陷的预测。

Design of integrated lattice structures and Helmholtz resonators for superior mechanical properties and low-frequency sound absorption

Shaoji Zhang, Xiangyan Meng, Cheng Shen, Yucheng Yuan, Bo Song

doi:10.1016/j.compstruct.2026.120495

集成晶格结构和亥姆霍兹谐振器的设计，具有优异的机械性能和低频吸声

Existing noise-reduction structures are often simultaneously required to bear loads. However, current acoustic–mechanical multifunctional designs are complex, case-specific, and lack a universal methodology. This study proposes a strategy for acoustic-mechanical multifunctional structures by combining lattice architectures with Helmholtz resonators. The resulting structures couple the high load-bearing capacity of lattice frameworks with low-frequency sound absorption. Three lattice-enhanced acoustic metamaterials are developed: Simple Cubic lattice-enhanced acoustic Metamaterial (SCM), Body-Centered Cubic lattice-enhanced acoustic Metamaterial (BCCM), and Modified Face-centered cubic and Body-centered cubic hybrid lattice-enhanced acoustic Metamaterial (MFBM). A theoretical model is established to relate structural parameters to the sound absorption coefficient and is validated by numerical simulations. Using a genetic algorithm, the MFBM is optimized to achieve an average sound absorption coefficient of 0.9 in the 350–700 Hz range, realizing broadband quasi-perfect absorption via superposed unit-cell resonances. Under identical structural parameters, SCM and BCCM exhibit absorption curves similar to that of MFBM, but the corresponding frequencies are lower. Acoustic experiments agree well with theory and simulations. All three structures exhibit excellent mechanical performance, with MFBM showing the most favorable overall properties. The proposed strategy provides a new paradigm for designing multifunctional acoustic structures.

现有的降噪结构通常需要同时承受载荷。然而，目前的声学-机械多功能设计是复杂的，具体的情况下，缺乏一个通用的方法。本研究提出了一种将晶格结构与亥姆霍兹谐振器相结合的声-力学多功能结构策略。由此产生的结构将格架的高承载能力与低频吸声相结合。开发了三种晶格增强声学超材料：简单立方晶格增强声学超材料（SCM）、体心立方晶格增强声学超材料（BCCM）和改进面心立方和体心立方混合晶格增强声学超材料（MFBM）。建立了结构参数与吸声系数关系的理论模型，并通过数值模拟进行了验证。利用遗传算法对MFBM进行了优化，使其在350-700 Hz范围内的平均吸声系数达到0.9，通过叠加的单胞共振实现了宽带准完美吸收。在相同的结构参数下，SCM和BCCM的吸收曲线与MFBM相似，但相应的频率较低。声学实验与理论和模拟结果吻合良好。三种结构均表现出优异的力学性能，其中MFBM的综合性能最优。该策略为多功能声学结构的设计提供了一种新的范式。

Composites Part A: Applied Science and Manufacturing

Two-stage deep learning for the modeling and prediction of fiber volume fraction in soft-hard hybrid braided preform during compaction process

Baolong Mei, Jiuzhi Dong, Lipeng Xing, Rui Li, Xiuming Jiang

doi:10.1016/j.compositesa.2026.109964

基于两阶段深度学习的软硬混合编织预制体压实过程中纤维体积分数的建模与预测

To improve the Fiber Volume Fraction (FVF) of carbon/carbon (C/C) composite soft-hard hybrid braided preforms and reduce the interlayer deviation of fiber content, the traditional single compaction process is optimized. To address this challenge, this paper proposes a two-stage deep learning architecture to enhance the prediction accuracy for preform FVF. In the first stage, a neural network is used to construct a multiple regression model (NNMR) that incorporates multiple process parameters. Based on an investigation into the compaction mechanism of preforms, the influence of multiple process parameters on the FVF is a nalyzed. Specifically, the NNMR is employed to learn the nonlinear relationships between these parameters and the preform FVF. For the second stage, a Nonlinear Model Predictive Control (NMPC) framework is employed, where the fitted process parameters serve as model inputs and the preform FVF as the model output. By constraining the target range, dynamic and refined adjustments are performed to obtain the optimal combination of process parameters. Notably, this method can overcome the limitations of traditional compaction methods and achieve efficient, accurate, and reliable prediction of preform FVF, thereby providing theoretical support for preform compaction processes.

为了提高碳/碳（C/C）复合软硬混合编织预制体的纤维体积分数（FVF），减小纤维含量的层间偏差，对传统的单一压实工艺进行了优化。为了解决这一挑战，本文提出了一种两阶段深度学习架构来提高预成形FVF的预测精度。在第一阶段，使用神经网络构建包含多个工艺参数的多元回归模型（NNMR）。在研究预成形件压实机理的基础上，分析了多个工艺参数对预成形件压实特性的影响。具体来说，利用核磁共振来学习这些参数与预成形FVF之间的非线性关系。对于第二阶段，采用非线性模型预测控制（NMPC）框架，其中拟合的过程参数作为模型输入，预成形FVF作为模型输出。通过约束目标范围，进行动态精细化调整，获得工艺参数的最优组合。值得注意的是，该方法克服了传统压实方法的局限性，实现了高效、准确、可靠的预成形FVF预测，为预成形压实工艺提供了理论支持。

Unveiling the impact of chemical bleaching on flax fibres: from cellulose reorganisation to mechanical performance

Delphine Quereilhac, Alessia Melelli, Mario Scheel, Jonathan Perrin, Xavier Falourd, Jason Govilas, Alain Bourmaud

doi:10.1016/j.compositesa.2026.109963

揭示化学漂白对亚麻纤维的影响：从纤维素重组到机械性能

Improving the mechanical performance of flax fibres for textile and biocomposite applications requires reducing kink-band defects, which induce cellulose microfibril misorientation and local pore clusters. While today some studies focus on limiting their formation, no work has reported a quantitative attenuation in kink-band population and severity at the fibre batch level. In this study, tensile testing revealed that a conventional chemical bleaching process based on hydrogen peroxide and sodium hydroxide, widely used in the textile industry, enhances by 21.5% the stress at break of elementary fibres. This result is unexpected, as further SEM observations highlight local surface damage, particularly at kink-band areas. To resolve this contradiction, a multimodal characterization approach was employed. At the cell-wall scale, X-ray micro-computed tomography showed that bleaching reduces kink-band porosity by a factor of 10.1, while second harmonic generation microscopy revealed a 1.6-fold reduction in microfibrillar misalignment, explaining the improved mechanical properties. At the microfibril scale, nuclear magnetic resonance indicated a reduction in non-cellulosic components, suggesting that a cocrystallization mechanism during bleaching may promote a more stable and oriented cellulose microfibrils arrangement. Overall, these findings represent a significant step toward developing solutions capable of reducing fibre defects, and thus improve their mechanical properties for increasingly high-performance biocomposites.

改善亚麻纤维在纺织和生物复合材料中的机械性能需要减少扭结带缺陷，这种缺陷会导致纤维素微纤维取向错误和局部孔隙团簇。虽然目前一些研究侧重于限制扭结带的形成，但没有研究报道扭结带数量和纤维批级严重程度的定量衰减。在这项研究中，拉伸测试表明，在纺织工业中广泛使用的以过氧化氢和氢氧化钠为基础的传统化学漂白工艺，可使初级纤维的断裂应力提高21.5%。这一结果是出乎意料的，因为进一步的扫描电镜观察突出了局部表面损伤，特别是在扭结带区域。为了解决这一矛盾，采用了多模态表征方法。在细胞壁尺度上，x射线微计算机断层扫描显示，漂白将扭结带孔隙率降低了10.1倍，而二次谐波产生显微镜显示，微纤维错位减少了1.6倍，这解释了机械性能的改善。在微纤维尺度上，核磁共振显示非纤维素成分减少，表明漂白过程中的共结晶机制可能促进纤维素微纤维排列更稳定和定向。总的来说，这些发现代表着朝着开发能够减少纤维缺陷的解决方案迈出了重要的一步，从而提高了高性能生物复合材料的机械性能。

Composites Part B: Engineering

Annealing-Induced Particle Reorientation Enhanced Through-Plane Thermal Conductivity in PPS/h-BN Composites

Megan L. O’Neil, Ty Henderson, Penelope Jankoski, Tristan D. Clemons, Olivia McNair

doi:10.1016/j.composites b.2026.113845

退火诱导的颗粒重取向增强PPS/h-BN复合材料的通平面导热性

Thermally conductive polymer composites are promising lightweight materials for thermal management in high-power electronics; however, the effect of short-term thermal annealing on directional heat transport remains insufficiently understood. Herein, polyphenylene sulfide (PPS)/hexagonal boron nitride (h-BN) composites were prepared by twin-screw extrusion and melt pressing, then thermally annealed in air at 340 °C for 5, 30, or 60 min. In-plane and through-plane thermal conductivities were evaluated as a function of annealing time and correlated with rheological behavior, crystallization, chemical-state evolution, and filler-network morphology using parallel plate rheology, differential scanning calorimetry (DSC), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). At low filler loadings, annealing primarily altered the PPS matrix response, with limited changes in thermal conductivity. In contrast, at 50 vol. % h-BN, through-plane thermal conductivity increased from 1.41 ± 0.12 W/m·K after 5 min to 2.31 ± 0.22 W/m·K after 30 min and remained elevated at 2.11 ± 0.16 W/m·K after 60 min. In-plane thermal conductivity remained comparatively insensitive to annealing time across the compositions examined. XRD showed a decrease in the h-BN A(002)/A(100) peak-area ratio with increasing annealing time, consistent with reduced preferential in-plane orientation and improved through-plane network contribution. SEM observations and semi-empirical Lewis-Nielsen model fitting further supported annealing-dependent changes in the effective h-BN network structure. These results indicate that short-term thermal annealing can serve as a post-processing strategy to modify filler-network architecture and reduce thermal transport anisotropy in highly filled PPS/h-BN composites.

导热聚合物复合材料是一种很有前途的轻质材料，用于大功率电子器件的热管理；然而，短期热退火对定向热输运的影响尚不清楚。采用双螺杆挤压和熔融挤压法制备了聚苯硫醚(PPS)/六方氮化硼（h-BN）复合材料，并在340℃空气中进行了5、30、60 min的热退火。利用平行板流变学、差示扫描量热法（DSC）、x射线光电子能谱（XPS）和x射线衍射（XRD），评估了面内和透面导热系数作为退火时间的函数，并与流变行为、结晶、化学状态演变和填料网络形貌相关。在低填料负荷下，退火主要改变PPS矩阵的响应，导热系数变化有限。相比之下，在50 vol. % h-BN时，通过面导热系数从5 min后的1.41±0.12 W/m·K增加到30 min后的2.31±0.22 W/m·K，并在60 min后保持在2.11±0.16 W/m·K。面内热导率相对而言对退火时间不敏感。XRD结果表明，随着退火时间的延长，h-BN a (002)/ a（100）的峰面积比减小，这与面内取向的优先性降低和通过面网络贡献的提高相一致。SEM观察和半经验Lewis-Nielsen模型拟合进一步支持了h-BN有效网络结构的退火相关变化。这些结果表明，短期热退火可以作为一种后处理策略来改变填料网络结构，降低高填充PPS/h-BN复合材料的热输运各向异性。

Supramolecular Interfacial Engineering Triggered Electron Delocalization for Tailoring CNT Dispersion and Microwave-Coupled Curing Kinetics

Zheng Chen, Jiabao Zhu, Jikang Zhao, Jianjun Yi, Xianhua Huan, Hefeng Li, Xiaolong Jia, Xiaoping Yang

doi:10.1016/j.composites b.2026.113844

超分子界面工程触发电子离域裁剪碳纳米管分散和微波耦合固化动力学

Achieving a synergy between high microwave absorption and mechanical robustness at ultralow filler loadings is a long-standing challenge, primarily due to the severe trade-off between filler dispersion and the preservation of intrinsic electronic structures. In this work, we report a non-destructive supramolecular interfacial engineering strategy to fabricate high-performance epoxy nanocomposites. By utilizing a reactive amino-functionalized ionic liquid (IL) to encapsulate carbon nanotubes (CNT), we successfully triggered interfacial electron delocalization through robust cation–π interactions, as elucidated by density functional theory (DFT) calculations. This preserved and enhanced π-conjugation system serves as an electrodynamic antenna, inducing intense Maxwell-Wagner-Sillars polarization under microwave fields. Such interfacial dielectric loss facilitates an inside-out microwave-coupled curing kinetics, effectively freezing the homogeneous CNT network and suppressing secondary agglomeration. Remarkably, at an ultralow CNT loading of 0.5 wt.%, the composites achieved a minimum reflection loss of −20.07 dB (effective bandwidth of 3.7 GHz) and a significant enhancement in tensile strength (94.8 MPa). This strategy provides a transformative paradigm for the rapid manufacturing of structural–functional integrated materials by decoupling the conflicts between nanoscopic thermodynamics and macroscopic processing.

在超低填料负载下实现高微波吸收和机械稳健性之间的协同作用是一个长期存在的挑战，主要是由于填料分散和保留固有电子结构之间的严重权衡。在这项工作中，我们报告了一种非破坏性的超分子界面工程策略来制备高性能环氧纳米复合材料。通过利用反应性氨基功能化离子液体（IL）封装碳纳米管（CNT），我们成功地通过强大的阳离子-π相互作用触发了界面电子离域，正如密度泛函理论（DFT）计算所阐明的那样。这种保留和增强的π共轭体系作为电动力天线，在微波场下产生强烈的麦克斯韦-瓦格纳-西拉极化。这种界面介电损耗促进了由内而外的微波耦合固化动力学，有效地冻结了均匀的碳纳米管网络并抑制了二次团聚。值得注意的是，在0.5 wt.%的超低碳纳米管负载下，复合材料的反射损耗最小为- 20.07 dB（有效带宽为3.7 GHz），抗拉强度显著提高（94.8 MPa）。该策略通过解耦纳米热力学和宏观加工之间的冲突，为结构功能集成材料的快速制造提供了一种变革范例。

COMBINED AND ISOLATED EFFECTS OF HUMIDITY AND TEMPERATURE ON MONOTONIC AND FATIGUE RESPONSE OF FLAX FIBRE/EPOXY COMPOSITES

Valentin Perruchoud, Alexandros Prapavesis, René Alderliesten, Yasmine Mosleh

doi:10.1016/j.composites b.2026.113841

湿度和温度对亚麻纤维/环氧复合材料单调和疲劳响应的联合和单独影响

FRP structures are subjected to a combination of environmental and mechanical loads that act in an interactive way, determining service life. This study investigates the isolated and combined effects of in-situ temperature and relative humidity on monotonic and tension-tension fatigue response of two flax/epoxy laminates ([0/90/0]S and [+45/-45]2S), benchmarked against equivalent GFRP laminates. Particular emphasis was given to stiffness evolution, strain accumulation, and hysteretic behaviour particularly energy dissipation. Increasing temperature consistently reduced stiffness, strength, and fatigue life for both flax FRP laminates, leading to downward shifts and tilts of the S–N curves. The effect of moisture alone was laminate-dependent: elevated moisture content reduced stiffness, strength and fatigue life in the shear-dominated [+45/-45]2S laminate, whereas the [0/90/0]S laminate showed increased fatigue life attributed to enhanced ductility and increased laminate strength. Combined elevated temperature and moisture content lead to reduced monotonic stiffness and strength whilst their effects on fatigue life were cumulative. The largest effect was observed for the [+45/-45]2S laminate, where fatigue life decreased by approximately three orders of magnitude. Across all hygrothermal conditions, energy dissipation was found to be an indicator of fatigue life with higher hysteretic energy dissipation per cycle correlated with reduced fatigue life. When assessed relative to baseline S–N behaviour, flax FRPs exhibit a proportional sensitivity to combined temperature and humidity comparable to GFRPs, indicating that flax composites are not disproportionately penalised under hot–wet fatigue loading.

FRP结构受到环境和机械载荷的共同作用，以相互作用的方式决定其使用寿命。本研究研究了现场温度和相对湿度对两种亚麻/环氧复合材料（[0/90/0]S和[+45/-45]2S）的单调和拉伸疲劳响应的单独和联合影响，并以等效GFRP复合材料为基准。特别强调的是刚度演变，应变积累和滞回行为，特别是能量耗散。温度升高会持续降低两种亚麻玻璃钢层压板的刚度、强度和疲劳寿命，导致S-N曲线向下移动和倾斜。含水率的增加会降低剪切主导的[+45/-45]2S层压板的刚度、强度和疲劳寿命，而[0/90/0]S层压板的疲劳寿命则会因延性增强和层压板强度增加而增加。温度和含水率的升高导致单调刚度和强度的降低，而对疲劳寿命的影响是累积的。影响最大的是[+45/-45]2S层压板，其疲劳寿命下降了大约三个数量级。在所有湿热条件下，能量耗散被发现是疲劳寿命的一个指标，每个循环的滞后能量耗散较高，与疲劳寿命降低相关。当相对于基线S-N行为进行评估时，亚麻纤维复合材料表现出与gfrp相当的对温度和湿度的比例敏感性，这表明亚麻复合材料在湿热疲劳载荷下不会受到不成比例的惩罚。

Comparison between 1D and 2D delamination growth in composite laminates: An experimental and numerical investigation

Wenjie Tu, John-Alan Pascoe, René Alderliesten

doi:10.1016/j.composites b.2026.113836

复合材料层合板中一维和二维分层生长的比较：实验和数值研究

Delamination growth in composite laminates is essentially two-dimensional (2D), indicating a multidirectional spreading of interlaminar damage. However, the evaluation and prediction of delamination growth mainly relies on the quantification of one-dimensional (1D) growth using unidirectional specimens. In this study, the discrepancies and similarities between 1D and 2D delamination behaviours of composite laminates are investigated, both experimentally and numerically. The fracture toughness of mode II delamination, measured experimentally through 1D tests, is compared with the numerically fitted critical Energy Release Rate (ERR) in 2D delamination using Cohesive Zone Modelling (CZM) method. The fracture mechanisms involved in 1D and 2D delamination growth are investigated through fractography at the delamination interfaces. Although similar damage mechanisms are present in 1D and 2D tests, using the fracture toughness measured from 1D tests to predict 2D growth is proven to be insufficient due to distinct extrinsic toughening effects. Variations in local stress states significantly influence delamination growth, necessitating different cohesive constitutive models to accurately describe 1D and 2D delamination processes.

复合材料层合板的分层生长基本上是二维的，表明层间损伤是多向扩展的。然而，对分层生长的评价和预测主要依赖于利用单向试样对一维生长进行量化。在本研究中，研究了复合材料层板的一维和二维分层行为的差异和相似之处。采用内聚区建模（CZM）方法，将一维实验测量的II型脱层断裂韧性与数值拟合的二维脱层临界能量释放率（ERR）进行了比较。通过断口学研究了一维和二维脱层生长过程中的断裂机制。尽管在1D和2D试验中存在类似的损伤机制，但由于不同的外部增韧效应，使用1D试验测量的断裂韧性来预测2D生长被证明是不够的。局部应力状态的变化显著影响分层生长，需要不同的内聚本构模型来准确描述一维和二维分层过程。

Defect-induced and deformation-mediated: a relay race-hardening strategy for high-content nanoparticle-reinforced aluminum matrix composites

Lichaoran Guan, Kan Liu, Yishi Su, Yiwei Dong, Mingyu Li, He Cao, Andong Hua, Qiubao Ouyang, Di Zhang

doi:10.1016/j.composites b.2026.113848

缺陷诱导和变形介导：高含量纳米颗粒增强铝基复合材料的接力硬化策略

Aluminum matrix composites (AMCs) reinforced with high-content nanoparticles offer great potential for breaking modulus-strength-ductility trade-off, yet still face the challenge of spontaneous agglomeration and insufficient strain hardening in ultrafine-grained (UFG) matrices. This work presents a novel strategy that spatially arranges high-content (15 wt%) SiC nanoparticles (SiCnps) to construct a heterogeneous grain structure within 2024Al. The synergistic architecture SiCnp/2024Al composites realized significantly enhanced mechanical properties over the 2024Al matrix, with yield strength and Young’s modulus increasing by 49.8% and 31.9%, respectively, while maintaining elongation of >7%. The well-balanced strength-ductility is attributed to the microstructural responses during straining. Initially, hetero-grained interfaces drive the rapid multiplication of geometrically necessary dislocations (GNDs) in fine-grained (FG) zones. Subsequently, dislocation accumulation is enhanced by high-content SiCnps with associated lattice defects (stacking fault, Lomer-Cottrell lock and 9R structure) in UFGs at the later plastic stage. Such an innovative “relay race-hardening” mechanism, orchestrated by the cross-scale hetero-structures, gives rise to a distinctive three-stage strain hardening behavior. Notably, such behavior is not observed in AMCs with 2% SiCnps. Quantitative an alysis of dislocation dynamic signals further elucidates the underlying deformation mediated mechanisms. This work thus provides a new pathway for designing high-content nanoparticle-reinforced AMCs.

高含量纳米颗粒增强铝基复合材料（AMCs）具有打破模量-强度-塑性平衡的巨大潜力，但在超细晶（UFG）基体中仍然面临自发团聚和应变硬化不足的挑战。这项工作提出了一种新的策略，即在2024Al中空间排列高含量（15 wt%） SiC纳米颗粒（SiCnps）以构建非均质晶粒结构。与2024Al基体相比，SiCnp/2024Al复合材料的力学性能得到了显著提高，屈服强度和杨氏模量分别提高了49.8%和31.9%，伸长率保持了7%。这种良好的强度-塑性平衡归因于应变过程中的微观组织响应。最初，异粒度界面驱动了细粒度区域中几何上必要的位错（GNDs）的快速增加。随后，在塑性后期，高含量的SiCnps和相关的晶格缺陷（层错、lomo - cottrell锁和9R结构）在UFGs中增强了位错积累。这种创新的“接力硬化”机制，在跨尺度异质结构的协调下，产生了独特的三阶段应变硬化行为。值得注意的是，在具有2% SiCnps的amc中没有观察到这种行为。对位错动态信号的定量分析进一步阐明了潜在的变形介导机制。本研究为设计高含量纳米颗粒增强碳纤维提供了新的途径。