【新文速递】2025年3月4日固体力学SCI期刊最新文章

今日更新：Composite Structures 1 篇，Composites Part A: Applied Science and Manufacturing 1 篇，Composites Part B: Engineering 7 篇，Composites Science and Technology 1 篇Composite StructuresEffects of layer imperfections and material gradation on circumferential shear horizontal waves in cylindrical piezoelectric composite structureVipin Gupta, Sunita Kumawat, Sumit Kumar Vishwakarma, MS. Barak, Soumik Dasdoi:10.1016/j.compstruct.2025.118997层缺陷和材料级配对圆柱形压电复合材料结构周向剪切水平波的影响This study examines the propagation of circumferential shear horizontal (SH) waves through a cylindrical composite structure with three concentric layers. The configuration includes an innermost functionally graded orthotropic (FGO) layer, a self-reinforced (SR) middle layer for mechanical stability, and an outer piezoelectric (PE) layer designed to enhance sensitivity for sensor and actuator applications. The interfaces between the layers are imperfectly bonded, leading to mechanical and electro-mechanical coupling imperfections. Dispersion relations were developed under specific boundary conditions, revealing how interface imperfections, initial stresses, and changes in radii influence the wave phase velocity. This research also explores the complex interlayer surface response, a phenomenon often overlooked in prior studies, offering new insights into layer interactions and their effects on wave propagation. Results indicate a strong wavenumber dependency of phase velocity with significant variations due to functional gradation and higher angular modes. The FGO layer shows the highest stress levels, while the PE layer contributes minimally to stress but plays a crucial role in electromechanical conversion. Interface imperfections and initial stress in the PE layer subtly alter stress distribution, affecting the overall performance of the composite structure. These findings enhance the functionality of surface acoustic wave sensors, piezoelectric actuators, and other related devices.本研究考察了周向剪切水平波（SH）在三同心层圆柱复合结构中的传播。该结构包括最内层的功能梯度正交异性（FGO）层，用于机械稳定性的自增强（SR）中间层，以及用于增强传感器和执行器应用灵敏度的外部压电（PE）层。层与层之间的界面结合不完美，导致机械和机电耦合缺陷。在特定的边界条件下建立了色散关系，揭示了界面缺陷，初始应力和半径变化如何影响波相速度。本研究还探讨了复杂的层间表面响应，这一现象在以往的研究中经常被忽视，为层间相互作用及其对波传播的影响提供了新的见解。结果表明，相速度具有很强的波数依赖性，由于功能梯度和更高的角模而发生显著变化。FGO层显示出最高的应力水平，而PE层对应力的贡献最小，但在机电转换中起着至关重要的作用。PE层中的界面缺陷和初始应力会微妙地改变应力分布，影响复合材料结构的整体性能。这些发现增强了表面声波传感器、压电致动器和其他相关设备的功能。Composites Part A: Applied Science and ManufacturingMulti-source lay-up error analysis and lay-up pressure optimization for robotic automated fiber placement (AFP)Xiaokang Xu, Liang Cheng, Zhijia Cai, Jiangxiong Li, Yinglin Kedoi:10.1016/j.compositesa.2025.108825机器人自动铺放光纤的多源铺放误差分析及铺放压力优化Automated Fiber Placement (AFP) offers significant advantages in manufacturing large aircraft structures but is prone to defects impacting product quality and mechanical performance. Lay-up Pressure Error (LPE), influenced by various factors, notably lay-up pressure, affects AFP quality. Our study focuses on a heavy-duty robot with pre-positioned lay-up mechanisms for AFP. We analyze the impact of robot and end effector (AFP head) errors on LPE, developing analytical models for compaction rollers and prepreg to establish constitutive relationships. A Generalized Tool Point Error (GTE) incorporating mold path point offsets is formulated. Additionally, models for joint torsion and bending deformation, considering end forces and robot gravity, are established. Mapping joint errors to AFP robot end-effector errors (ARE) is achieved using extended Jacobian matrices. We comprehensively analyze error effects on LPE and establish an optimization index for robot pose to mitigate LPE. Experimental results validate the effectiveness of our optimization method in enhancing lay-up pressure uniformity, accuracy, and overall quality while reducing defects.自动纤维铺放（AFP）技术在大型飞机结构制造中具有显著的优势，但也容易出现影响产品质量和机械性能的缺陷。铺层压力误差（LPE）受各种因素的影响，尤其是铺层压力，影响AFP质量。我们的研究重点是一种重型机器人，具有预先定位的AFP铺设机制。我们分析了机器人和末端执行器（AFP头部）误差对LPE的影响，建立了压实辊和预浸料的分析模型以建立本构关系。提出了包含模具路径点偏移量的广义刀具点误差（GTE）。建立了考虑末端力和机器人重力的关节扭转和弯曲变形模型。利用扩展雅可比矩阵实现了关节误差到AFP机器人末端执行器误差的映射。综合分析了误差对LPE的影响，建立了机器人姿态优化指标来缓解LPE。实验结果验证了该优化方法在提高铺层压力均匀性、精度和整体质量的同时减少缺陷的有效性。Composites Part B: Engineering3D printing of ceramic matrix composites: strengthening and toughening strategiesFeng Zhang, Shixiang Zhou, Huaying You, Gang Zhang, Jiquan Yang, Yusheng Shidoi:10.1016/j.compositesb.2025.112335陶瓷基复合材料的3D打印：强化和增韧策略Three dimensional (3D) printing, or additive manufacturing (AM) of ceramics has obtained broad attentions in recent years among industry and academia. However, ceramic materials inevitably suffer from their inherent brittleness and unexpected fracture. Thus, many researchers have developed various ceramic composites for diverse applications to overcome this drawback. In this review, versatile 3D printed ceramic composites are investigated, including carbonaceous materials reinforced ceramic matrix composites (CMrCMCs), metal reinforced ceramic matrix composites (MrCMCs), polymer reinforced ceramic matrix composites (PrCMCs), and ceramic reinforced ceramic matrix composites (CrCMCs), a particular focus is placed on scrutinizing how the added reinforcements strengthen and toughen the 3D printed ceramic composite structures. Based on the categories of four reinforcement phases and seven main 3D printing technologies, various ceramic strengthening and toughening mechanisms are discussed, and it was found that CrCMCs encompass the most sophisticated toughening strategies, such as phase transformation toughening, microcrack toughening, crack deflection and bridging, whiskers/fiber toughening, and in-situ toughening etc. Some specific 3D printing technologies such as coaxial extrusion, and material extrusion of ceramic ink and continuous fibers are introduced. Finally, summary and a perspective for future research work in 3D printing of strengthened and toughened ceramic composites are discussed.陶瓷的三维打印或增材制造近年来受到了工业界和学术界的广泛关注。然而，陶瓷材料不可避免地受到其固有的脆性和意外断裂的影响。因此，许多研究人员已经为不同的应用开发了各种陶瓷复合材料来克服这一缺点。在这篇综述中，研究了多功能3D打印陶瓷复合材料，包括碳质材料增强陶瓷基复合材料（CMrCMCs），金属增强陶瓷基复合材料（MrCMCs），聚合物增强陶瓷基复合材料（PrCMCs）和陶瓷增强陶瓷基复合材料（CrCMCs），特别关注的是如何加强和增韧3D打印陶瓷复合材料结构。基于4种增强相和7种主要3D打印技术的分类，讨论了各种陶瓷强化增韧机制，发现crcmc包括相变增韧、微裂纹增韧、裂纹挠曲和桥接、晶须/纤维增韧和原位增韧等最复杂的增韧策略。介绍了陶瓷油墨和连续纤维的同轴挤压、材料挤压等3D打印的具体技术。最后，对三维打印增强增韧陶瓷复合材料的研究工作进行了总结和展望。Cobalt/copper coordinated organic-inorganic hybrid fibrous phosphorus-nitrogen flame retardant: Simultaneously improving fire safety, deicing and mechanical properties for thermoplastic polyurethaneGaoyuan Li, Jirui Qu, Biyu Huang, Hongbo Zhao, Wenbo Sun, Haopeng Zhang, Lei Liu, Xilei Chen, Chuanmei Jiaodoi:10.1016/j.compositesb.2025.112292钴/铜配位有机无机杂化纤维磷氮阻燃剂：同时提高热塑性聚氨酯的防火安全性、除冰性和机械性能Thermoplastic polyurethane (TPU), a commonly used cable wrapping material for new energy vehicles and charging stations but faces the limitation of high fire hazard. However, conventional synthesis strategies of flame retardants (FRs) often fail to achieve the enhancement of the combination of fundamental properties of TPU, including flame retardancy, melt dropping resistance, stretchability, and toughness, which are necessary for practical applications. Herein, a novel strategy for the synthesis of a cobalt/copper coordinated organic-inorganic hybrid fibrous phosphorus-nitrogen FR (CoCu/P-N) inspired by supramolecular aggregates is proposed and used as an additive for TPU. TPU composites containing CoCu/P-N (TPU-CoCu/P-N) exhibited remarkable improvements in fire safety, melt dripping resistance, mechanical properties, and deicing performance. Cone calorimeter tests (CCT) revealed that TPU-6CoCu/P-N achieved substantial reductions in peak heat release rate (pHRR), total smoke production (TSP), and total carbon monoxide production (TCOP) values by 65.2%, 74.2%, and 59.3%, respectively, compared to pure TPU. Notably, only 2 wt% CoCu/P-N enabled TPU composite to achieve UL-94 V-0 rating. Additionally, ice on the surface of TPU-6CoCu/P-N melted and slid off significantly faster. Furthermore, TPU-6CoCu/P-N demonstrated a high tensile strength of 36.48 MPa and an elongation at break of 878.94%. Through comprehensive characterization and analysis, the underlying mechanisms responsible for the enhanced multifunctional performance of TPU-CoCu/P-N were elucidated. This work provides valuable insights and strategies for the design of advanced FRs, contributing to the development of safer high-performance TPU composites.热塑性聚氨酯（TPU）是新能源汽车和充电站常用的电缆包绕材料，但其火灾危险性高。然而，传统的阻燃剂合成策略往往不能实现TPU的基本性能组合的增强，包括阻燃性、耐熔体跌落性、拉伸性和韧性，这是实际应用所必需的。本文提出了一种受超分子聚集体启发合成钴/铜配位有机-无机杂化纤维磷氮FR （CoCu/P-N）的新策略，并将其用作TPU的添加剂。含有CoCu/P-N （TPU-CoCu/P-N）的TPU复合材料在防火安全性、抗熔体滴性、力学性能和除冰性能方面均有显著改善。锥形量热计测试（CCT）表明，与纯TPU相比，TPU- 6cocu /P-N可显著降低峰值放热率（pHRR）、总产烟量（TSP）和总一氧化碳产量（TCOP）值，分别降低65.2%、74.2%和59.3%。值得注意的是，只有2 wt%的CoCu/P-N使TPU复合材料达到UL-94 V-0等级。此外，TPU-6CoCu/P-N表面的冰融化和滑动速度明显加快。TPU-6CoCu/P-N的抗拉强度为36.48 MPa，断裂伸长率为878.94%。通过综合表征和分析，阐明了TPU-CoCu/P-N多功能性能增强的潜在机制。这项工作为先进fr的设计提供了有价值的见解和策略，有助于开发更安全的高性能TPU复合材料。Amorphous calcium carbonate formation from carbonated recycled cement powder: a novel carbonation-activated cementitious materialJiayu Huang, Yuxuan Chen, Qingliang Yudoi:10.1016/j.compositesb.2025.112336碳化再生水泥粉形成无定形碳酸钙：一种新型碳化活化胶凝材料Research on recycled cement powder (RCP) has shown great potential for carbon sequestration, however understanding of calcium carbonate polymorphs evolution in carbonated recycled cement powder (C-RCP) remains limited, especially concerning the formation of amorphous calcium carbonate (ACC) and its impact on the development of concrete strength. In this study, ACC is produced from C-RCP using poly-aspartic acid (pAsp) to control the crystallization of CaCO3, aiming to create a highly reactive cementitious material. The research systematically investigates the effects of various processing parameters, specifically pAsp concentration, ethanol concentration, temperature, and carbonation duration on ACC formation, carbonation products microstructure, and chemical environment. Additionally, the compressive strength of C-RCP as supplementary cementitious materials (SCMs) is also evaluated. The results indicate that higher concentrations of pAsp (10-15%) and ethanol (50-70%) enhance the stabilization of ACC formation. The decrease in carbonation degree correlates with the increase in the formation of metastable CC (mCC), including ACC and vaterite within C-RCP. Furthermore, elevated temperature and extended carbonation duration promote the formation of vaterite due to an increased carbonation degree. The incorporation of novel C-RCP, characterized by a maximum relative content of mCC, significantly enhances the strength of cement paste, attributed to the transformation and crystallization of ACC. This method utilizes pAsp to control the crystallization of calcium carbonate in C-RCP, effectively activating the reactivity of the calcium carbonate phase. This approach significantly enhances the potential of C-RCP as a novel cement-based material by optimizing its hydration reactivity, making it particularly well-suited for application in carbonated cement composites.再生水泥粉（RCP）的研究显示出巨大的固碳潜力，但对碳化再生水泥粉（C-RCP）中碳酸钙晶型演变的了解仍然有限，特别是对无定形碳酸钙（ACC）的形成及其对混凝土强度发展的影响。本研究利用聚天冬氨酸（pAsp）控制CaCO3的结晶，以C-RCP为原料制备ACC，旨在制备一种高活性胶凝材料。本研究系统考察了各种工艺参数，特别是pAsp浓度、乙醇浓度、温度和碳化时间对ACC形成、碳化产物微观结构和化学环境的影响。此外，还对C-RCP作为补充胶凝材料（SCMs）的抗压强度进行了评价。结果表明，较高浓度的pAsp（10-15%）和乙醇（50-70%）增强了ACC形成的稳定性。碳酸化程度的降低与亚稳CC （metastable CC, mCC）的形成增加有关，包括C-RCP内的ACC和vaterite。此外，温度升高和碳酸化时间的延长促进了碳酸盐岩的形成。新型C-RCP的掺入，以mCC的相对含量最高为特征，由于ACC的转变和结晶，显著提高了水泥浆体的强度。该方法利用pAsp控制碳酸钙在C-RCP中的结晶，有效激活碳酸钙相的反应活性。这种方法通过优化C-RCP的水化反应活性，显著增强了其作为新型水泥基材料的潜力，使其特别适合于碳酸水泥复合材料的应用。A Porous Electrically and Thermally Conductive Composite Film for Heat Dissipation and Electromagnetic Interference ShieldingLei Zhang, Xiaoxiao Ding, Debin Lin, Yongbao Feng, Huili Fu, Guang Xiao, Peng Xu, Qiulong Lidoi:10.1016/j.compositesb.2025.112339 一种用于散热和电磁干扰屏蔽的多孔导电导热复合膜MXene, as an emerging graphene-like 2D material, has exhibited excellent electromagnetic interference (EMI) shielding performance because of its outstanding electrical conductivity, multiple interfaces, low density, and easy structure-constructing feature. However, the easy to stack for the 2D structure will seriously weaken the attenuation of electromagnetic waves, and heighten the secondary reflection because of high conductivity. Herein, we prepared the 3D porous MXene@fractal Ag micro-dendrites (Ag FDs) composite films by using vacuum filtration method that is induced by K ions, and then used the freeze-drying way to construct the 3D porous structure. The introduction of Ag FDs into the system can significantly improve the electrical conductivity and thermal conductivity. Additionally, the design of porous structure dramatically enhanced the multiple dissipation of electromagnetic waves, thereby augmenting the EMI shielding performance. The obtained porous composite film (thickness: 55 μm) with only 20 wt% Ag FDs delivers an outstanding EMI shielding effectiveness (SE) of 69 dB with an excellent specific EMI SE (1.25 × 104 dB cm2 g-1), and a distinguished thermal conductivity of 26.6 W m-1 K-1. This porous MXene@Ag FDs composite film demonstrates exceptional EMI shielding and thermal transport properties, offering new strategies for integrating EMI shielding with thermal management.MXene作为一种新兴的类石墨烯二维材料，由于其优异的导电性、多界面、低密度、易构造等特点，具有优异的电磁干扰屏蔽性能。然而，二维结构的易叠加性将严重削弱电磁波的衰减，并因其高导电性而使二次反射增强。本文采用K离子诱导的真空过滤法制备三维多孔MXene@fractal银微枝晶（Ag FDs）复合薄膜，然后采用冷冻干燥的方法构建三维多孔结构。在系统中引入Ag fd可以显著提高系统的导电性和导热性。此外，多孔结构的设计大大提高了电磁波的多重耗散，从而提高了电磁干扰屏蔽性能。所获得的多孔复合膜（厚度：55 μm）仅含20 wt% Ag fd，具有69 dB的出色EMI屏蔽效能（SE），具有出色的比EMI SE (1.25 × 104 dB cm2 g-1)，以及26.6 W m-1 K-1的杰出导热系数。这种多孔MXene@Ag FDs复合膜具有出色的电磁干扰屏蔽和热传输性能，为集成电磁干扰屏蔽和热管理提供了新的策略。Desulfurization-modified red mud for supersulfated cement production: Insights into hydration kinetics, microstructure, and mechanical propertiesZhongtao Luo, Mengxiao Ge, Lei Liu, Xiaohai Liu, Wensheng Zhang, Jiayuan Ye, Mingkang Gao, Yifan Yang, Maoliang Zhang, Xinhong Liudoi:10.1016/j.compositesb.2025.112340用于超硫酸盐水泥生产的脱硫改性赤泥：水化动力学、微观结构和机械性能的见解Investigating the production of supersulfated cement (SSC) using desulfurization-modified red mud is essential for enhancing the high-value utilization of calcium-based solid waste and advancing the development of low-carbon cementitious materials. In this study, red mud (RM) underwent desulfurization modification via a simulated flue gas desulfurization process, yielding red mud desulfurization residue (RMD). This RMD was subsequently employed as a resource component for the production of SSC samples. The effect of RMD addition on compressive strength was examined. The hydration kinetics and microstructural characteristics of the SSC based on RMD (SSCR) system were analyzed using various techniques, including ICC, XRD, TGA, FT-IR, MAS NMR, MIP and SEM-EDS. The results indicated that gypsum generated from the desulfurization reaction constituted the primary component of the resulting RMD. The gypsum particles exhibited a regular columnar morphology, while the unreacted residual particles displayed a coarser and more porous microstructure. Compared to a single alkali-activated system utilizing Ca(OH)2, the appropriate incorporation of RMD significantly accelerated the hydration process of the SSCR system. The increase in products such as AFt and C-(A)-S-H gels, along with an increased proportion of gel pores (<10 nm), collectively contributed to the enhancement of mechanical properties. However, the presence of larger residual particles within the RMD might lead to the formation of larger voids and microcracks in the hardened paste, potentially limiting strength development, particularly when RMD was incorporated in excessive amounts.研究利用脱硫改性赤泥生产过硫酸盐水泥（SSC），对于提高钙基固体废物的高价值利用和推进低碳胶凝材料的发展具有重要意义。本研究通过模拟烟气脱硫过程对赤泥（RM）进行脱硫改性，得到赤泥脱硫渣（RMD）。该RMD随后被用作生产SSC样品的资源组件。考察了添加RMD对抗压强度的影响。采用ICC、XRD、TGA、FT-IR、MAS NMR、MIP和SEM-EDS等技术对基于RMD （SSCR）体系的SSC水化动力学和微观结构特征进行了分析。结果表明，脱硫反应生成的石膏是生成的RMD的主要成分。石膏颗粒表现为规则的柱状结构，而未反应的残余颗粒则表现为较粗的多孔结构。与利用Ca(OH)2的单一碱活化体系相比，适当加入RMD可显著加快SSCR体系的水化过程。AFt和C-(A)- s - h凝胶等产物的增加，以及凝胶孔（<10 nm）比例的增加，共同促进了机械性能的增强。然而，RMD中较大残留颗粒的存在可能导致硬化膏体中形成较大的空隙和微裂纹，潜在地限制了强度的发展，特别是当RMD加入量过大时。Self-reinforced thermoplastic polyurethane composite with excellent mechanical properties, heat resistance and sustainable recyclingXiulu Gao, Huan Qian, Jiaqi Wang, Yuxuan Hong, Yichong Chen, Ling Zhao, Dongdong Hudoi:10.1016/j.compositesb.2025.112342 自增强热塑性聚氨酯复合材料具有优异的机械性能、耐热性和可循环利用性The traditional reinforcement and toughening approaches of thermoplastic polyurethane (TPU) fail to adequately address the mechanical properties, compatibility and recyclability of TPU composites. In this study, the self-reinforced TPU composite was successfully prepared by introducing self-reinforced fiber structure. The reinforced fibers and matrix phase had the same chemical composition, and the reinforced fibers could be uniformly distributed in the TPU matrix. The fibril network structure formed by reinforced fibers enhanced the rheological properties of self-reinforced TPU composites. The hydrogen bond interactions between reinforced fibers and TPU matrix improved the micro-phase separation structure. The fibril network and excellent interfacial interactions significantly enhanced the strength and toughness of TPU matrix. When the reinforced fiber content was 7 wt.%, the tensile strength, elongation at break and tensile toughness of TPU7 were increased by 58.2%, 107.1% and 210.3%, respectively. The introduction of reinforced fibers increased the heat resistance of TPU composites by 20-30 °C. After ten-times closed-loop recycling process, the elongation at break of TPU7 only decreased by 11.0%. This work provides a solution strategy for preparing TPU composites with ultra-high mechanical properties, thermal stability and sustainable recycling-reprocessing.传统的热塑性聚氨酯（TPU）增强和增韧方法未能充分考虑TPU复合材料的力学性能、相容性和可回收性。本研究通过引入自增强纤维结构，成功制备了自增强TPU复合材料。增强纤维与基体相具有相同的化学成分，增强纤维能均匀分布在TPU基体中。增强纤维形成的纤维网状结构增强了自增强TPU复合材料的流变性能。增强纤维与TPU基体之间的氢键相互作用改善了微相分离结构。纤维网络和良好的界面相互作用显著提高了TPU基体的强度和韧性。当增强纤维含量为7 wt.%时，TPU7的抗拉强度、断裂伸长率和拉伸韧性分别提高了58.2%、107.1%和210.3%。增强纤维的引入使TPU复合材料的耐热性提高了20-30℃。经过10次闭环循环处理后，TPU7的断裂伸长率仅下降11.0%。本研究为制备具有超高力学性能、热稳定性和可持续循环再加工的TPU复合材料提供了解决方案。Neuron-inspired structure towards ultra-high thermal conductivity of Mg-based materialsFanjin Yao, Bo Hu, Zixin Li, Lexian Li, Jiaxuan Han, Zhenfei Jiang, Dejiang Li, Xiaoqin Zengdoi:10.1016/j.compositesb.2025.112345 神经元启发结构实现镁基材料的超高导热性The remarkable lightweight characteristics of magnesium (Mg) offer significant advantages in 5G communication, 3C products, and new energy vehicles. Yet, the unsatisfactory thermal conductivity of Mg alloys presents formidable challenges in accommodating the advancement of high power density, highly integrated, and miniaturized electronic components in the era of intelligence. Here, inspired by the neurons in the human brain, cell body-like graphite flakes (GF) and axon-like carbon fibers (CF) are constructed into a neuron-inspired structure through pre-mixed & laid powder stir casting (PPSC). Drawing inspiration from the myelin sheath of neurons, a biomimetic interfacial structure is constructed in situ to ensure efficient heat conduction. The neuron-inspired Mg-based materials at a GF:CF volume ratio of 1:3 display an ultrahigh and isotropic thermal conductivity of 200.5 W/(m·K) (393% of the common cast Mg alloys, AZ91D) and an exceptional low density of 1.80 g/cm3. This epitomizes the zenith of comprehensive properties among all thermal management materials reported to date. The ingeniously devised neuron-inspired structure, myelin sheath biomimetic interface, and tunable GF-CF volume ratio co-contribute to the superior thermal conductivity. This work offers an advanced biomimetic strategy towards the development of next-generation lightweight thermal management materials.镁（Mg）显著的轻量化特性在5G通信、3C产品和新能源汽车中具有显著优势。然而，镁合金的热导率令人不满意，这对适应智能时代高功率密度、高集成度和小型化电子元件的发展提出了巨大的挑战。在这里，受人脑神经元的启发，通过预先混合和铺设粉末搅拌铸造（PPSC），将细胞体样石墨薄片（GF）和轴突样碳纤维（CF）构建成神经元启发结构。从神经元的髓鞘中汲取灵感，在原位构建仿生界面结构以确保有效的热传导。GF:CF体积比为1:3的神经元激发Mg基材料显示出200.5 W/（m·K）的超高各向同性导热系数（为普通铸造镁合金AZ91D的393%）和1.80 g/cm3的超低密度。这是迄今为止报道的所有热管理材料综合性能的顶峰。巧妙设计的神经元启发结构，髓鞘仿生界面和可调的GF-CF体积比共同贡献了优越的导热性。这项工作为下一代轻质热管理材料的开发提供了一种先进的仿生策略。Composites Science and TechnologyInvestigation on the in situ interfacial Mode II fracture toughness of the 3D woven compositesQingsong Zong, Jinzhao Huang, Junfeng Ding, Licheng Guodoi:10.1016/j.compscitech.2025.111125 三维编织复合材料原位界面II型断裂韧性研究The interfacial mode II fracture toughness G_IIC is an important parameter that significantly affects the damage evolution of the composite materials under shear load. Traditional interlaminar fracture toughness test methods are no longer suitable for the measurement of interfacial fracture toughness within the 3D woven composites (3DWCs) because these methods cause yarn breakage, which could overestimate the fracture toughness by more than ten times. To this end, this paper proposes a new method to obtain the in situ interfacial G_IIC of the 3DWCs. The stable propagation of the mode II crack along the interface was achieved by the unique specimen design. A highly restored finite element (FE) model of the specimen was established, and the virtual crack closure technique (VCCT) was adopted to calculate the interfacial G_IIC. The rationality of the experiments and the validation of the simulation have been carefully demonstrated. The values of G_IIC obtained from three different off-axis angles are consistent, which proves the effectiveness of the proposed method.界面Ⅱ型断裂韧性 G_IIC 是一个重要的参数，它显著影响复合材料在剪切载荷下的损伤演化。传统的层间断裂韧性测试方法已不再适用于测量三维编织复合材料（3DWCs）内的界面断裂韧性，因为这些方法 会导致纱线断裂，从而高估断裂韧性十倍以上。为此，本文提出了一种新的方法来获取 3DWCs 的原位界面 G_IIC。通过独特的试样设计实现了沿界面的Ⅱ型裂纹稳定扩展。建立了试样的高度恢复有限元（FE）模型，并采用虚拟裂纹闭合技术（VCCT）计算界面 G_IIC。实验的合理性以及模拟的有效性都得到了仔细论证。从三个不同偏轴角度获得的 G_IIC 值一致，证明了所提出方法的有效性。 来源：复合材料力学仿真Composites FEM