Composites Science and Technology最新文献_第3页

Corrigendum to: Enhanced radiation shielding performance of tungsten borides-epoxy composites [Composites Science and Technology, (269), 2025, 111233 DOI: https://doi.org/10.1016/j.compscitech.2025.111233] 钨硼化物-环氧复合材料增强辐射屏蔽性能[j] .复合材料科学与技术，（269），2025,111233 DOI: https://doi.org/10.1016/j.compscitech.2025.111233]

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-11-20 DOI: 10.1016/j.compscitech.2025.111448

Furkan Erdogan, Santiago Bermudez, Reza Mohammadi, Jessika V. Rojas

引用次数: 0

A strain-adaptive hierarchical network enabling durable and highly sensitive conductive yarns for health monitoring 一种应变自适应分层网络，使耐用和高灵敏度的导电纱线用于健康监测

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-11-20 DOI: 10.1016/j.compscitech.2025.111457

Jiajia He, Xinru Xian, Ying Chen, Shengnan Min, Chenxi Lu

The development of high-performance elastic conductive yarns is often constrained by a formidable challenge: the inherent trade-off between high sensitivity and a wide sensing range, rooted in the poor adhesion and catastrophic fracture of conductive coatings upon stretching. Herein, we report a novel subsurface engineering strategy facilitated by an in-situ constructed FeOOH nanoscaffold on polyurethane (PU) yarns, which, combined with a pre-stretching design, effectively guides the distribution of polypyrrole (PPy) during polymerization. The process parameters were optimized via an orthogonal experimental design, which successfully constructs a strain-adaptive hierarchical conductive network characterized by surface microcracks, interfacial folded structures, and an internal PPy-permeated layer. The optimized conductive yarn exhibits an exceptional combination of an ultra-high gauge factor (3.71 × 10⁶) and a wide sensing range (up to 310 % strain). Mechanistic investigations reveal that the electrical response adapts to strain through a smart transition of the dominant conductive pathway: from surface crack propagation at low strains (ensuring high sensitivity) to the continuous internal network at large strains (guaranteeing broad range and durability). The FeOOH scaffold is proven crucial for enhancing the coating's uniformity and firmness. Finally, we demonstrate the practical utility of our sensor in monitoring diverse human motions and subtle physiological signals, showcasing its potential as a high-performance platform for wearable health monitoring.

高性能弹性导电纱的开发经常受到一个巨大挑战的制约：高灵敏度和宽传感范围之间的内在权衡，其根源在于导电涂层在拉伸时粘附性差和灾难性断裂。在此，我们报告了一种新的地下工程策略，即在聚氨酯（PU）纱线上原位构建FeOOH纳米支架，结合预拉伸设计，有效地指导聚合过程中聚吡啶（PPy）的分布。通过正交实验设计对工艺参数进行优化，成功构建了以表面微裂纹、界面折叠结构和内部渗透层为特征的应变自适应分层导电网络。优化后的导电纱具有超高的测量系数（3.71 × 106）和宽传感范围（高达310%的应变）的特殊组合。力学研究表明，电响应通过主要导电途径的智能过渡来适应应变：从低应变下的表面裂纹扩展（确保高灵敏度）到大应变下的连续内部网络（保证宽范围和耐用性）。事实证明，FeOOH支架对于提高涂层的均匀性和坚固性至关重要。最后，我们展示了我们的传感器在监测各种人体运动和微妙生理信号方面的实际效用，展示了它作为可穿戴健康监测高性能平台的潜力。

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引用次数: 0

Designing high-performance ultrathin composites with spread carbon fiber and carbon dots modified epoxy resin 设计高性能碳纤维与碳点改性环氧树脂的超薄复合材料

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-11-20 DOI: 10.1016/j.compscitech.2025.111456

Cheng Zhang , Jiling Zhao , Yang Chen , Huawei Zou

Combining spread carbon fiber (CF₂₄) with an epoxy matrix modified by carbon dots (CDs), this study develops ultrathin composites exhibiting superior mechanical, thermal, electrical, and electromagnetic interference (EMI) shielding performance. The fiber spreading process enhances fiber alignment, contributing to the high-performance characteristics of the composites. The incorporated CDs demonstrate excellent compatibility and dispersion within the epoxy resin, and participate in the curing reaction, leading to a notable improvement in matrix properties. Optimal performance is achieved at a CDs loading of 0.15 wt%, with the resulting composite showing increases of 54.79 % in transverse fiber bundle strength, 37.02 % in interlaminar shear strength, and 24.83 % in compressive strength relative to the baseline CF₂₄ composite. Moreover, the 0.15 wt% CDs composite exhibits the highest thermal diffusivity, the lowest electrical resistivity, and an exceptional EMI shielding effectiveness of 41.84 dB. This work broadens the application scope of CDs in epoxy resin systems and demonstrates a viable strategy for fabricating functionalized ultrathin carbon fiber reinforced polymer composites with integrated multifunctional properties.

本研究将碳纤维（CF24）与碳点（CDs）改性的环氧树脂基体相结合，开发出具有优异机械、热、电和电磁干扰（EMI）屏蔽性能的超薄复合材料。纤维铺展过程增强了纤维的排列，有助于提高复合材料的高性能。加入的CDs在环氧树脂中表现出良好的相容性和分散性，并参与固化反应，导致基体性能显著改善。当cd载荷为0.15 wt%时，复合材料的性能达到最佳，与基准CF24复合材料相比，复合材料的横向纤维束强度提高了54.79%，层间剪切强度提高了37.02%，抗压强度提高了24.83%。此外，0.15 wt%的CDs复合材料具有最高的热扩散率，最低的电阻率，以及41.84 dB的卓越EMI屏蔽效率。本研究拓宽了CDs在环氧树脂体系中的应用范围，为制备具有综合多功能性能的功能化超薄碳纤维增强聚合物复合材料提供了可行的策略。

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引用次数: 0

Carbon nanotube-graphite felt reinforced composite phase change materials for synergistic energy conversion and thermal management 碳纳米管-石墨毡增强复合相变材料的协同能量转换和热管理

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-11-19 DOI: 10.1016/j.compscitech.2025.111454

Xuebing Dai , Liping Zeng , Qianyao Zhang , Su Huan , Xiaohua Li

Amid escalating global energy demands and the imperative transition toward sustainable energy systems, phase change materials (PCM) have emerged as pivotal enablers for enhancing energy efficiency. However, organic PCM face leakage susceptibility and inadequate thermal/electrical conductivity, which have critically constrained their practical deployment in renewable energy applications. This study innovatively engineered a carbon nanotube-reinforced graphite felt composite PCM (CNT/GF-MPP) through a rational structural hybridization strategy. By integrating a three-dimensional graphite felt scaffold with carbon nanotubes to adsorb ternary co-crystals (MPP), the composite achieved synergistic enhancement of capillary forces and crystallization kinetics, resulting in a remarkable loading factor of 91.42 % while suppressing leakage to 4.8 % at 70 °C. The architecture demonstrated exceptional thermal conductivity with 1.15 W/(m·K), 259 % improvement over pristine MPP and maintained a phase change enthalpy of 182.3 J/g at optimal CNT loading (0.1 %wt). It has dual-mode energy conversion capabilities: a photothermal efficiency of 90.0 % under 1-sun irradiation and an electrothermal conversion efficiency of 71.9 % at 2.5 V. The composite exhibited maintaining 98.8 % enthalpy retention over 100 thermal cycles. Practical verification of thermal management demonstrates precise regulation of body temperature (26.5–26.8 °C) during physical activity. This research provides technical support for multifunctional thermal management.

随着全球能源需求的不断增长和向可持续能源系统的迫切转变，相变材料（PCM）已成为提高能源效率的关键推动者。然而，有机PCM面临泄漏敏感性和导热/导电性不足，这严重限制了其在可再生能源应用中的实际部署。本研究通过合理的结构杂交策略，创新地设计了碳纳米管增强石墨毡复合材料PCM （CNT/GF-MPP）。通过将三维石墨毡支架与碳纳米管集成以吸附三元共晶（MPP），复合材料实现了毛细力和结晶动力学的协同增强，导致加载系数达到91.42%，同时在70°C时将泄漏抑制到4.8%。该结构的导热系数为1.15 W/(m·K)，比原始MPP提高了259%，在最佳碳纳米管负载（0.1% wt）下保持了182.3 J/g的相变焓。它具有双模能量转换能力：在1太阳照射下光热效率为90.0%，在2.5 V下电热转换效率为71.9%。该复合材料在100次热循环中保持了98.8%的焓保持。热管理的实际验证表明，在身体活动期间，体温（26.5-26.8°C）的精确调节。本研究为多功能热管理提供了技术支持。

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引用次数: 0

Achieving high temperature energy storage performance in PVDF through synergizing cross-linking and BNNs doping strategies 通过协同交联和bnn掺杂策略实现PVDF的高温储能性能

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-11-17 DOI: 10.1016/j.compscitech.2025.111455

Qiuying Zhao , Jiachen Shi , Lu Yang , Ming Zhang , Hongli Ji , Jinhao Qiu

The growing demand for electrostatic capacitors in extreme conditions highlights the urgent need for polymer dielectric films with high breakdown strength (E_b), high discharge energy density (U_e), and outstanding high-temperature stability. Herein, a high-temperature stable capacitive composite film based on poly(vinylidene fluoride-co-chlorotrifluoroethylene) (P(VDF-CTFE)) is proposed by synergizing cross-linking and doping strategies. Specifically, P(VDF-CTFE) is engineered to form a cross-linking network and subsequently doped with surface-modified BNNs (BNNs-OH). By harnessing the synergistic effect between cross-linking and BNNs-OH doping, one can effectively restrict molecular mobility, disrupt the growth of crystalline domains, and inhibit the propagation of electrical trees and defects. This dual modification not only enhances the structural integrity of the polymer matrix but also improves its breakdown strength, high-temperature stability, and energy storage capabilities. The resultant composite film delivers a high discharge energy density up to 14.1 Jcm⁻³ at 25 °C and 13.59 Jcm⁻³ at 150 °C, validating its distinguished temperature stability over a wide temperature range. This study presents a facile strategy to develop advanced polymer dielectric films for harsh operating environments where both performance and durability are crucial.

在极端条件下对静电电容器的需求日益增长，迫切需要具有高击穿强度（Eb）、高放电能量密度（Ue）和出色的高温稳定性的聚合物介电膜。本文采用交联和掺杂的协同策略，制备了一种基于聚偏氟乙烯-共氯三氟乙烯（P(VDF-CTFE)）的高温稳定电容性复合薄膜。具体来说，P（VDF-CTFE）被设计成形成交联网络，随后掺杂表面修饰的BNNs （BNNs- oh）。通过利用交联和BNNs-OH掺杂之间的协同效应，可以有效地限制分子迁移率，破坏晶体结构域的生长，抑制电树和缺陷的传播。这种双重改性不仅增强了聚合物基体的结构完整性，而且提高了其击穿强度、高温稳定性和储能能力。合成的复合薄膜在25°C和150°C下的放电能量密度分别高达14.1 Jcm−3和13.59 Jcm−3，证明了其在宽温度范围内的优异温度稳定性。这项研究提出了一种简单的策略来开发先进的聚合物介电薄膜，用于性能和耐用性都至关重要的恶劣操作环境。

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引用次数: 0

Hydrothermal aging induced interfacial degradation behavior of 3D printed continuous glass fiber composites 水热老化诱导3D打印连续玻璃纤维复合材料界面降解行为

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-11-17 DOI: 10.1016/j.compscitech.2025.111452

Kui Wang , Gejin Zhao , Ying Chen , Bing Yang , Yong Peng , Yanni Rao

This study investigated the interfacial degradation behavior of continuous glass fiber-reinforced composites fabricated using the fused deposition manufacturing technique under accelerated hydrothermal aging. The accelerated aging was conducted at 60 °C and 100 % relative humidity for up to 30 days. The bonding strength of three interlayer structures, including the polyamide 6 (PA6) matrix layer/PA6 matrix layer (M/M), PA6 matrix layer/continuous glass fiber layer (M/G), and continuous glass fiber layer/continuous glass fiber layer (G/G), was evaluated through roller peeling tests. The results indicated that the M/M interlayer specimen (Inter-M/M) exhibited the highest peeling strength, while the G/G interlayer specimen (Inter-G/G) showed the lowest peeling strength for the as-prepared specimens. The primary failure mode in Inter-M/M was characterized by plastic deformation and ductile fracture of the matrix, while the main failure mode in Inter-G/G involved the debonding of continuous glass fibers from the matrix. After aging, the bonding strength of all three interlayer structures declined to varying degrees, with the M/G interlayer specimen (Inter-M/G) showing the greatest reduction. The effects of hydrothermal aging on interfacial degradation were primarily characterized by a change in the matrix failure mode, reduced crack initiation in adjacent layers, and weakened bonding between fibers and matrix.

研究了熔融沉积法制备的连续玻璃纤维增强复合材料在加速水热老化条件下的界面降解行为。在60°C和100%相对湿度下进行加速老化，最长可达30天。通过滚剥试验，对聚酰胺6 （PA6）基层/PA6基层（M/M）、PA6基层/连续玻璃纤维层（M/G）、连续玻璃纤维层/连续玻璃纤维层（G/G）三种层间结构的结合强度进行了评价。结果表明：M/M夹层试样（Inter-M/M）的剥离强度最高，G/G夹层试样（Inter-G/G）的剥离强度最低；Inter-M/M的主要破坏模式是基体的塑性变形和韧性断裂，而Inter-G/G的主要破坏模式是连续玻璃纤维与基体的剥离。时效后，3种夹层组织的结合强度均有不同程度的下降，其中M/G夹层试样（Inter-M/G）的结合强度下降幅度最大。热液时效对界面降解的影响主要表现为基体破坏模式的改变、相邻层裂纹萌生的减少以及纤维与基体结合的减弱。

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引用次数: 0

Multilayer design and multi-objective optimization of neutron shielding composites by means of MCNP simulation and machine learning 基于MCNP仿真和机器学习的中子屏蔽复合材料多层设计与多目标优化

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-11-15 DOI: 10.1016/j.compscitech.2025.111451

Benben Liu , Yizhuo Gu , Ruiqi Guo , Shaokai Wang , Min Li

To meet neutron shielding and lightweight requirements, fiber-reinforced polymer matrix composites offer significant advantages as multifunctional materials with both structural and shielding capabilities. Owing to their inherent multicomponent and multilayered configurations, selecting suitable reinforcements and optimizing multilayer structure remains challenging. This study addresses the design and multi-objective optimization of multilayer composite shielding structures for neutron radiation protection. Monte Carlo N-Particle (MCNP) simulation method is adopted to predict radiation shielding property of various composites. A homogeneous model is first employed to examine the effects of typical shielding fillers (B₄C and WO₃) on the effective neutron dose in an epoxy resin matrix across the full neutron energy spectrum. Subsequently, an idealized layered structure model is used to clarify material composition strategies and multi-layer design principles for epoxy resin matrix composite. The results show that for fast neutron protection, a bilayer configuration with a high-Z material as the front layer and a hydrogen-rich matrix as the rear layer is optimal. For slow neutron protection, multilayer configurations demonstrate significant advantages: a 128-layer structure can reduce the effective dose of slow neutrons by up to 30 % compared with a bilayer structure. Furthermore, a multi-objective optimization strategy is proposed for multilayer structures by integrating MCNP simulations with machine learning, which can optimize shielding efficiency, structural thickness, and overall mass. Among six regression algorithms, a three-layer neural network model is chosen, which achieves high prediction precision. This approach optimizes both the minimum-dose configuration at fixed thickness and the minimum-weight configuration at fixed dose, providing efficient design guidelines for multilayer composite shielding.

为了满足中子屏蔽和轻量化的要求，纤维增强聚合物基复合材料作为兼具结构和屏蔽能力的多功能材料具有显著的优势。由于其固有的多组分和多层结构，选择合适的增强材料和优化多层结构仍然是一个挑战。研究了用于中子辐射防护的多层复合屏蔽结构的设计与多目标优化。采用蒙特卡罗n粒子（MCNP）模拟方法对各种复合材料的辐射屏蔽性能进行了预测。本文首先采用均匀模型研究了典型屏蔽填料（B4C和WO3）在全中子能谱范围内对环氧树脂基体中有效中子剂量的影响。随后，利用理想分层结构模型阐明了环氧树脂基复合材料的材料组成策略和多层设计原则。结果表明，对于快中子防护，以高z材料为前层，富氢基质为后层的双层结构是最优的。对于慢中子防护，多层结构显示出显著的优势：与双层结构相比，128层结构可以减少多达30%的慢中子有效剂量。此外，将MCNP仿真与机器学习相结合，提出了多层结构的多目标优化策略，可以优化屏蔽效率、结构厚度和总质量。在六种回归算法中，选择了三层神经网络模型，实现了较高的预测精度。该方法优化了固定厚度下的最小剂量配置和固定剂量下的最小重量配置，为多层复合屏蔽提供了有效的设计指导。

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引用次数: 0

Supramolecular network-modified pyrolytically recycled carbon fiber composites with recyclability, shape-memory effects, and flame retardation 具有可回收性、形状记忆效应和阻燃性的超分子网络改性热解再生碳纤维复合材料

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-11-15 DOI: 10.1016/j.compscitech.2025.111450

Jiaming Li , Xinyu Lu , Hongmingjian Zhang , Haonuo He , Manxi Zhou , Xiaoping Yang , Gang Sui

With the continuous increase in the use of carbon fiber composites, the composite waste generated during production and application will always have an impact on the environment. By pyrolyzing carbon fiber composites, carbon fibers can be recycled, which is also beneficial for the sustainable development of carbon fiber composites. Compared to commercial carbon fiber (CFs), the performance of recycled carbon fiber (rCFs) is somewhat reduced, and it is generally mainly used as a low value filler. In order to enhance the application value of recycled fibers and broaden their application fields, we developed a simple, eco-friendly modification technique to construct supramolecular networks on the surface of rCFs. Evaluate the application effect of carbon fiber by preparing composite materials with tannic acid cured epoxy resin (TE). In comparison with rCFs composite samples, the supramolecular network modified rCF composites can achieve performance improvements through synergistic non covalent and covalent interface interactions: mechanical strength increased by 27.01 %, shape memory storage entropy energy density increased by 8.95 %, and structural stability was maintained under high temperature conditions. This work provides a new technological approach for the widespread application of recycled carbon fibers.

随着碳纤维复合材料使用量的不断增加，在生产和应用过程中产生的复合材料废弃物总是会对环境产生影响。通过对碳纤维复合材料进行热解，可以回收利用碳纤维，这也有利于碳纤维复合材料的可持续发展。与商用碳纤维（CFs）相比，再生碳纤维（rcf）的性能有所降低，一般主要用作低价值填料。为了提高再生纤维的应用价值，拓宽其应用领域，我们开发了一种简单、环保的改性技术，在再生纤维表面构建超分子网络。评价单宁酸固化环氧树脂（TE）制备碳纤维复合材料的应用效果。与rCF复合材料样品相比，超分子网络改性的rCF复合材料通过非共价界面和共价界面的协同作用实现了性能的提高：机械强度提高27.01%，形状记忆存储熵能密度提高8.95%，在高温条件下保持结构稳定性。本研究为再生碳纤维的广泛应用提供了新的技术途径。

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引用次数: 0

High-performance epoxy composites based on 3D interconnected hybrid filler network interface engineering: Synergistic enhancement of thermal and mechanical properties 基于三维互联杂化填料网络界面工程的高性能环氧复合材料：热性能和力学性能的协同增强

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-11-12 DOI: 10.1016/j.compscitech.2025.111436

Shuaishuai Zhou , Peiwen Sun , Mingxin Zhong , Shaohua Li , Peng Zhang , Meihong Liao , Peng Ding , Jingjie Dai

The exponential advancement of artificial intelligence technologies has driven a corresponding surge in chip power density. Effective heat dissipation is the key factor restricting their safety and reliability thereby intensifying the demand for advanced thermal management materials. Nevertheless, persistent trade-offs in thermomechanical properties constitute a fundamental bottleneck in the development of high-performance thermal management materials. In this work, epoxy resin composites with three-dimensional (3D) interconnected hybrid filler networks were fabricated by a multiscale cooperative strategy of “freeze-drying, high-temperature carbonization, and in-situ impregnation”. Based on the interface engineering strategy, the morphology synergy between graphene nanosheets and hydroxylated boron nitride nanosheets was utilized to construct an interconnected 3D network. Combined with high-temperature carbonization to eliminate network defects, the synergistic optimization of thermal conductivity and mechanical properties of epoxy composites was successfully achieved. The prepared epoxy composite exhibits an exceptional through-plane thermal conductivity of 3.10 W m⁻¹ K⁻¹ at a low hybrid filler content of 4.65 wt%, achieving a remarkable 1326 % improvement over pristine epoxy. Notably, it retains excellent compressive strength (204 MPa), indicating balanced thermomechanical properties. This work successfully overcomes the long-standing thermomechanical trade-off limitation in composite materials, offering novel design guidelines for next-generation high-efficiency thermal management composites.

人工智能技术的指数级发展带动了芯片功率密度的相应激增。有效的散热是制约其安全性和可靠性的关键因素，从而加大了对先进热管理材料的需求。然而，热机械性能的持续权衡构成了高性能热管理材料发展的基本瓶颈。采用“冷冻干燥-高温碳化-原位浸渍”的多尺度协同策略，制备了具有三维互联杂化填料网络的环氧树脂复合材料。基于界面工程策略，利用石墨烯纳米片和羟基化氮化硼纳米片之间的形态协同作用，构建了一个相互连接的三维网络。结合高温碳化消除网状缺陷，成功实现了环氧复合材料导热性能和力学性能的协同优化。在杂化填料含量为4.65 wt%的情况下，制备的环氧复合材料的通平面导热系数为3.10 W m−1 K−1，比原始环氧树脂的导热系数提高了1326%。值得注意的是，它保持了优异的抗压强度（204 MPa），表明平衡的热机械性能。这项工作成功地克服了复合材料长期存在的热力学权衡限制，为下一代高效热管理复合材料提供了新的设计指南。

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引用次数: 0

A micromechanics-based numerical study on the viscoelastic damping in carbon nanotube/polymer nanocomposites 基于微力学的碳纳米管/聚合物纳米复合材料粘弹性阻尼数值研究

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-11-11 DOI: 10.1016/j.compscitech.2025.111449

Kasra Abedi , Hasan Seraj , Reza Ansari , Mohammad Kazem Hassanzadeh-Aghdam , Jamaloddin Jamali , Saeid Sahmani

The viscoelastic damping behavior of carbon nanotube (CNT)/polymer nanocomposites is investigated using a 3D numerical micromechanical model based on the finite element method (FEM) and a complex modulus approach. This model uniquely considers the collective behavior and interactions of multiple, randomly or directionally aligned CNTs within a representative volume element (RVE). To account for the frictional energy dissipation at the interface, a thin, weakened, and lossy interphase is simulated around the CNTs. The computational framework is validated by comparing its predictions for the elastic, viscoelastic creep, and damping properties with existing experimental data. Furthermore, the model is used to perform a sensitivity analysis, exploring the influence of key nanostructural parameters on the effective loss factor of the nanocomposite. The results show that the effective loss factor is significantly enhanced by increasing the CNT volume fraction, a finding directly linked to the greater presence of the lossy interphase. Damping also increases with a thicker interphase and a higher relative loss factor of the interphase. The CNT aspect ratio is shown to have a notable effect, influencing the maximum damping achievable at a specific volume fraction. Finally, for aligned nanofillers, the study reveals a strong dependency of the directional loss factors on the CNT off-axis angle.

采用基于有限元法和复模量法的三维数值细观力学模型，研究了碳纳米管/聚合物纳米复合材料的粘弹性阻尼行为。该模型独特地考虑了代表性体积单元（RVE）内多个随机或定向排列的碳纳米管的集体行为和相互作用。为了考虑界面处的摩擦能量耗散，在CNTs周围模拟了一个薄的、减弱的、有损的界面相。通过将其对弹性、粘弹性蠕变和阻尼特性的预测与现有实验数据进行比较，验证了计算框架的有效性。此外，利用该模型进行了灵敏度分析，探讨了关键纳米结构参数对纳米复合材料有效损耗因子的影响。结果表明，通过增加碳纳米管体积分数，有效损耗因子显着增强，这一发现与损耗间相的存在直接相关。阻尼也随着间相厚度的增加和间相相对损耗因子的增加而增加。碳纳米管长径比具有显著的影响，影响在特定体积分数下可实现的最大阻尼。最后，对于定向纳米填料，研究揭示了碳纳米管离轴角对定向损失因子的强烈依赖性。

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引用次数: 0