Composites Part B: Engineering最新文献_第2页

Exceptional damping of CFRPs: Unveiling the impact of carbon fiber surface treatments CFRP 的超凡阻尼性能：揭示碳纤维表面处理的影响

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2024-11-12 DOI: 10.1016/j.compositesb.2024.111973

Jigang Feng , Chuang Gao , Babak Safaei , Zhaoye Qin , Haihong Wu , Fulei Chu , Fabrizio Scarpa

A significant body of research has concentrated on augmenting the interfacial slippage between carbon fiber (CF) fabrics and resin to improve the damping properties of CF reinforced plastics (CFRPs). However, a critical but commonly overlooked issue lies in the fact that a higher number of mutual slippage interfaces may lead to potential debonding at the interface. This, in turn, not only influences mechanical properties but also escalates the risk of structural damage. In this study, three distinct modification methods are proposed to alter the surface characteristics of CFs, achieving simultaneous enhancement of the damping and mechanical properties of CFRPs. Specifically, the polymerization of dopamine on the CF surface results in CFRPs with a loss factor of 0.227 at 1 Hz, which is 180 % higher than the 0.081 of referenced CFRP. Additionally, using this modification method, the tensile modulus and strength of the CFRP are increased by about 11.3 % and 6.7 %, respectively. More importantly, the subtle relationships within the CFRPs interface are explored through the different surface modification methods. The interactions between surface wettability, specific surface area, roughness, and interfacial chemical bonding on the mechanical and damping properties are redefined and elucidated. This study demonstrates that surface modification can simultaneously enhance both the damping and mechanical properties of CFRPs, and a satisfactory balance of multiple enhancement effects can be achieved by adjusting the surface modification factors.

大量研究都集中在增加碳纤维（CF）织物和树脂之间的界面滑移，以改善碳纤维增强塑料（CFRP）的阻尼特性。然而，一个关键但通常被忽视的问题在于，相互滑动界面的数量越多，可能会导致界面处的潜在脱粘。反过来，这不仅会影响机械性能，还会增加结构损坏的风险。本研究提出了三种不同的改性方法来改变 CF 的表面特性，从而同时提高 CFRP 的阻尼和机械性能。具体来说，在 CF 表面聚合多巴胺可使 CFRP 在 1 Hz 时的损耗因子达到 0.227，比参考 CFRP 的 0.081 高出 180%。此外，使用这种改性方法，CFRP 的拉伸模量和强度分别提高了约 11.3% 和 6.7%。更重要的是，通过不同的表面改性方法，探索了 CFRP 界面内部的微妙关系。重新定义并阐明了表面润湿性、比表面积、粗糙度和界面化学键对机械和阻尼特性的相互作用。这项研究表明，表面改性可以同时增强 CFRP 的阻尼和机械性能，而且通过调整表面改性因子，可以在多重增强效应之间取得令人满意的平衡。

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引用次数: 0

Designing high-performance green tire treads by reinforcing the styrene-butadiene rubber/silica interface with chain difunctionalization 通过链双官能化强化丁苯橡胶/二氧化硅界面设计高性能绿色轮胎胎面

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2024-11-09 DOI: 10.1016/j.compositesb.2024.111887

Yihui Xu , Yudong Liu , Yangyang Gao , Ling Liu , Liqun Zhang

For green tires, monofunctionalization of rubber has been extensively studied to enhance the interface between rubber and silica. However, the effect of chain difunctionalization has not been reported. In this work, the difunctionalized styrene-butadiene rubber (SBR-DF) was first prepared by grafting small molecules with different functional groups (3-mercaptopropionic acid, 3-mercaptoethanol, and mercaptosilane) to end-group functionalized SBR through thiol-ene click reaction. Then, the molecular dynamics simulation was adopted to calculate the interaction energy between SBR-DF and silica. The results showed that the chain difunctionalization can significantly increase the interfacial interaction energy between them, which was further validated by using RPA and SEM. Moreover, the introduced siloxane groups in the rubber chain can greatly improve the interfacial interaction energy by more than 20 %, which can achieve the uniform dispersion of silica. As a result, the SBR-DF/Silica composites showed the excellent dynamic mechanical properties, such as high wet slip resistance (21 % increase), low rolling resistance (23 % reduction) and high wear resistance (20 % reduction). As a result, the energy consumption of SBR-DF/Silica composites was reduced, which endowed green tires with excellent safety. In summary, this work provides a new and effective strategy for manufacturing the energy-saving, green and safe design of “green tires”.

对于绿色轮胎，人们对橡胶的单官能化进行了广泛研究，以增强橡胶与白炭黑之间的界面。然而，链式双官能化的效果尚未见报道。在这项工作中，首先通过硫醇-烯点击反应将不同官能团的小分子（3-巯基丙酸、3-巯基乙醇和巯基硅烷）接枝到端基官能化丁苯橡胶上，制备了双官能化丁苯橡胶（SBR-DF）。然后，采用分子动力学模拟计算了 SBR-DF 与二氧化硅之间的相互作用能。结果表明，链的双官能化可以显著增加它们之间的界面相互作用能，这一点通过 RPA 和 SEM 得到了进一步验证。此外，橡胶链中引入的硅氧烷基团可将界面相互作用能大大提高 20% 以上，从而实现白炭黑的均匀分散。因此，SBR-DF/白炭黑复合材料具有优异的动态机械性能，如高湿滑阻力（提高 21%）、低滚动阻力（降低 23%）和高耐磨性（降低 20%）。因此，SBR-DF/二氧化硅复合材料的能耗降低了，这赋予了绿色轮胎卓越的安全性。总之，这项工作为制造节能、绿色和安全的 "绿色轮胎 "设计提供了一种新的有效策略。

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引用次数: 0

A fluoride rechargeable resin adhesive with long-term antibacterial effect for improved dental treatment 一种具有长期抗菌效果的氟化物可充电树脂粘合剂，用于改善牙科治疗

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2024-11-08 DOI: 10.1016/j.compositesb.2024.111939

Daixing Zhang , Jiayi Guo , Yanyun Pang , Ming Liu , Yingjie Yu , Xiaoping Yang , Qing Cai

Polymerization shrinkage of composite resin during curing can form microcracks between the restoration and tooth tissue, facilitating bacterial colonization at the bonding interface and increasing the risk of secondary caries. Thus, developing antibacterial adhesives is crucial. This study synthesized a fluoride-containing dimethylaminohexadecyl methacrylate salt (DMAHDM-F) as a co-monomer to create a fluoride-rechargeable resin adhesive (FD-A) with long-term antibacterial properties. FD-A exhibits stable shear bonding strength, curing kinetics, high mechanical properties, and excellent biocompatibility. Its fluoride release can be sustained for over 1 year, achieving efficient antibacterial effect associated with the quaternary ammonium groups, being superior to those adhesives containing only NaF nanoparticles or quaternary ammonium groups. Of note, the FD-A adhesive is recharged with 10 ppm NaF solution after the one-year release test, and the re-fluorinated sample continues to release more fluoride ion, maintaining its antibacterial efficacy for extended period, which is a welcomed feature for dental applications. In summary, the photopolymerizable fluorinated quaternary ammonium salt provides a potential solution for making dental resin adhesives and composites with stable antibacterial effect to enhance the longevity of dental restorations.

复合树脂在固化过程中的聚合收缩会在修复体和牙齿组织之间形成微裂缝，从而促进细菌在粘接界面的定植，增加继发龋的风险。因此，开发抗菌粘合剂至关重要。本研究以含氟化物的甲基丙烯酸二甲基氨基十六烷基酯盐（DMAHDM-F）为共聚单体，合成了一种具有长期抗菌性能的氟化物充电树脂粘合剂（FD-A）。FD-A 具有稳定的剪切粘接强度、固化动力学、高机械性能和优异的生物相容性。其氟化物释放可持续 1 年以上，实现了与季铵盐基团相关的高效抗菌效果，优于仅含有 NaF 纳米颗粒或季铵盐基团的粘合剂。值得注意的是，FD-A 粘合剂在一年释放测试后重新注入 10ppm NaF 溶液，重新氟化的样品会继续释放更多氟离子，在更长的时间内保持其抗菌功效，这对于牙科应用来说是一个值得欢迎的特性。总之，可光聚合含氟季铵盐为制造具有稳定抗菌效果的牙科树脂粘合剂和复合材料提供了一种潜在的解决方案，从而提高了牙科修复体的使用寿命。

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引用次数: 0

Impact of hydrochloric acid doping on polyaniline conductivity and piezoelectric performance in polyaniline/bismuth oxyiodide nanocomposites 盐酸掺杂对聚苯胺/氧碘化铋纳米复合材料中聚苯胺电导率和压电性能的影响

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2024-11-08 DOI: 10.1016/j.compositesb.2024.111960

Bartłomiej Toroń , Tushar Kanti Das , Mateusz Kozioł , Piotr Szperlich , Mirosława Kępińska

This study investigates the impact of hydrochloric acid (HCl) doping, ranging from 0.2 M to 1.25 M, on the conductivity of polyaniline (PANI) and the piezoelectric performance of polyaniline/bismuth oxyiodide (PANI/BiOI) nanocomposites (NCs). Two distinct methods for fabricating NCs based on PANI and bismuth oxyiodide (BiOI) are proposed. Two distinct methods for fabricating PANI/BiOI NCs are proposed, and their optical and electrical properties are systematically examined. The direct allowed energy bandgap of the NCs is found to be approximately 1.9 eV. The piezoelectric performance, attributed to the 2D Janus structure of BiOI, is explored in detail, with the bulk piezoelectric coefficient measured at 1.43 (65) pm/V. Sensitivity to pressure interaction reached 21.1 (92) mV/bar, and the generated power was 5.09 nW for air pressure excitation in a composite consisting of 37.5 wt% BiOI and 62.5 wt% PANI doped with 0.2 M HCl, fabricated in-situ. The results demonstrate precise control over key parameters, including the fabrication method, sample thickness, HCl doping concentration, and BiOI content, highlighting the significant potential for enhancing nanogenerator functionality. These findings provide valuable insights into improving the performance of piezoelectric materials for energy harvesting technologies.

本研究探讨了盐酸（HCl）掺杂（0.2 M 至 1.25 M）对聚苯胺（PANI）电导率和聚苯胺/氧碘化铋（PANI/BiOI）纳米复合材料（NCs）压电性能的影响。提出了两种不同的方法来制造基于 PANI 和氧碘化铋（BiOI）的 NC。本文提出了两种不同的 PANI/BiOI NC 制备方法，并系统地研究了它们的光学和电学特性。发现 NC 的直接允许能带隙约为 1.9 eV。对压电性能进行了详细探讨，压电系数测量值为 1.43 (65) pm/V。在由 37.5 wt% BiOI 和 62.5 wt% 掺杂 0.2 M HCl 的 PANI 组成的复合材料中，原位制造的压力激励灵敏度达到 21.1 (92) mV/bar，产生的功率为 5.09 nW。结果表明，关键参数（包括制造方法、样品厚度、HCl 掺杂浓度和 BiOI 含量）得到了精确控制，凸显了增强纳米发电机功能的巨大潜力。这些发现为提高能量收集技术用压电材料的性能提供了宝贵的见解。

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引用次数: 0

Electrostatically connected Fe2O3@Ni-MOF nanosheet array heterojunction for high-performance light-assisted zinc-air batteries 用于高性能光助锌-空气电池的静电连接 Fe2O3@Ni-MOF 纳米片阵列异质结

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2024-11-07 DOI: 10.1016/j.compositesb.2024.111936

Jiangchang Chen, Ze Liu, Kaiyong Feng, Fengjun Deng, Yingjian Yu

Using sunlight to accelerate the sluggish redox reaction at the cathode of zinc-air batteries is an effective strategy. Fe₂O₃ nanoclusters have excellent photovoltaic properties. However, the photocatalytic redox activity of single Fe₂O₃ is generally low because of severe charge recombination and insufficient redox catalytic sites. Herein, a Fe₂O₃@Ni-MOF nanosheet array (NA) composite exposing abundant Fe₂O₃ nanoclusters was designed and prepared for accelerating photocatalytic oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). It was demonstrated that the Fe₂O₃@Ni-MOFNA heterojunction composites possessed a staggered S-type heterojunction that promoted charge separation and transfer under illumination. Theoretical calculations showed that Fe₂O₃@Ni-MOFNA composites had lower reaction free energies compared with the pristine component. Furthermore, the zinc-air battery yielded an output voltage of 1.76 V over the theoretical value and a round-trip efficiency of 98 % under illumination. This work provides a strategy for utilizing solar energy and developing light-assisted zinc-air batteries.

利用阳光加速锌-空气电池阴极缓慢的氧化还原反应是一种有效的策略。Fe2O3 纳米团簇具有优异的光电特性。然而，由于电荷重组严重和氧化还原催化位点不足，单个 Fe2O3 的光催化氧化还原活性普遍较低。本文设计并制备了一种暴露有大量 Fe2O3 纳米团簇的 Fe2O3@Ni-MOF 纳米片阵列（NA）复合材料，用于加速光催化氧还原反应（ORR）和氧进化反应（OER）。研究表明，Fe2O3@Ni-MOFNA 异质结复合材料具有交错的 S 型异质结，可在光照下促进电荷分离和转移。理论计算表明，与原始成分相比，Fe2O3@Ni-MOFNA 复合材料的反应自由能更低。此外，锌空气电池的输出电压比理论值高出 1.76 V，在光照下的往返效率达到 98%。这项研究为利用太阳能和开发光辅助锌-空气电池提供了一种策略。

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引用次数: 0

Morphological and dynamic mechanical properties of biobased epoxy composites with anisotropic, green carbon aerogels as reinforcement 以各向异性的绿色碳气凝胶为增强材料的生物基环氧树脂复合材料的形态和动态力学性能

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2024-11-07 DOI: 10.1016/j.compositesb.2024.111962

Bony Thomas , Henrik Lycksam , Fredrik Forsberg , Kristiina Oksman

Hierarchically porous, anisotropic, and green carbon aerogels (CAs) prepared from second most abundant and underutilized biopolymer lignin is used together with biobased epoxy resin to prepare green composite materials with superior mechanical properties. Green and facile preparation route involving ice-templating, lyophilization followed by carbonization was followed for the preparation of CAs. Ice-templating cooling rate is an important parameter in determining the porous structure of the CAs and by choosing a slower cooling rate bigger macropores can be achieved which facilitate the capillary impregnation of the epoxy resin through the CA structure. Hence in this study a cooling rate of 5 K/min was used and the CAs were prepared at 1000 °C from lignin/CNF suspensions containing 3, 5 and 7 wt% of total solid contents. Composites prepared using these CAs as reinforcements showed interesting morphologies which were analyzed using scanning electron microscopy and X-Ray microtomography. Prepared composites contained a mass fraction of 5–9 wt% of CAs. Composites showed remarkable 72 % higher dynamic mechanical properties compared to neat epoxy. Thus, this study introduces new synthesis strategy for carbon composites with completely biobased anisotropic CAs as oriented and strong reinforcements.

利用第二大丰富且利用率低的生物聚合物木质素与生物基环氧树脂制备分层多孔、各向异性的绿色碳气凝胶（CAs），以制备具有优异机械性能的绿色复合材料。在制备 CAs 的过程中，采用了绿色简便的制备方法，包括冰蒸、冻干和碳化。冰腾冷却速度是决定 CA 多孔结构的一个重要参数，选择较慢的冷却速度可以获得更大的大孔，从而有利于环氧树脂通过 CA 结构进行毛细管浸渍。因此，本研究采用了 5 K/min 的冷却速度，并在 1000 °C的温度下从木质素/CNF 悬浮液中制备 CA，其中木质素/CNF 悬浮液的总固体含量分别为 3、5 和 7 wt%。使用这些 CA 作为增强材料制备的复合材料呈现出有趣的形态，并使用扫描电子显微镜和 X 射线显微层析技术对其进行了分析。制备的复合材料中 CA 的质量分数为 5-9 wt%。与纯环氧树脂相比，复合材料的动态机械性能提高了 72%。因此，本研究为以完全生物基各向异性 CAs 作为定向强筋的碳复合材料引入了新的合成策略。

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引用次数: 0

3d printing of a continuous carbon fiber reinforced bronze-matrix composite using material extrusion 利用材料挤压技术 3d 打印连续碳纤维增强青铜基复合材料

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2024-11-07 DOI: 10.1016/j.compositesb.2024.111961

Mehrdad Mousapour, S Siddharth Kumar, Jouni Partanen, Mika Salmi

The main objective of this study is to investigate, for the first time, the feasibility of 3d printing a continuous carbon fiber (CCF) reinforced metal matrix composite using a cost-effective material extrusion (MEX) technology. Notably, this paper presents a detailed analysis of the microstructure and mechanical and physical properties of a bronze matrix composite reinforced with CCF. The results reveal that CCF significantly impedes the expected densification levels of the composite's structure, causing extensive gaps between the bronze particles. However, despite the high porosity level, the composite's electrical conductivity remains relatively high, demonstrating the limited negative impact of the CCF material on the composite's conductivity. Moreover, mechanical evaluations were performed through 3-point bending and tensile tests, highlighting the composite material's advantages and limitations. The results show that the composite material exhibits an improved yield stress of 76 %, increased ultimate tensile strength of 20 %, and an extended fracture strain of 30 %. However, the flexural strength decreases by 23 % due to the presence of massive gaps formed by CCF.

本研究的主要目的是首次研究利用经济有效的材料挤压（MEX）技术 3d 打印连续碳纤维（CCF）增强金属基复合材料的可行性。值得注意的是，本文详细分析了用 CCF 增强的青铜基复合材料的微观结构、机械性能和物理性能。结果表明，CCF 严重阻碍了复合材料结构的预期致密化水平，导致青铜颗粒之间出现大量空隙。然而，尽管孔隙率较高，复合材料的导电率仍然相对较高，这表明 CCF 材料对复合材料导电率的负面影响有限。此外，还通过三点弯曲和拉伸试验进行了机械评估，突出了复合材料的优势和局限性。结果显示，复合材料的屈服应力提高了 76%，极限拉伸强度提高了 20%，断裂应变提高了 30%。然而，由于 CCF 形成的巨大间隙的存在，抗弯强度降低了 23%。

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引用次数: 0

A validated simulation methodology for determining single lap shear allowable strength in thermoplastic polymer composites 用于确定热塑性聚合物复合材料单搭接剪切允许强度的验证模拟方法

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2024-11-06 DOI: 10.1016/j.compositesb.2024.111909

J. Ninyerola Gavaldà , I.R. Cózar , J.M. Guerrero , S. Abdel-Monsef , A. Sasikumar , A. Turon

While several modeling approaches exist to simulate the strength of single lap shear configurations, their application to obtaining design allowables for thermoplastic composites remains underexplored. This paper addresses this gap by presenting a novel methodology for the forward propagation of parameter uncertainty using advanced finite element models specifically tailored for thermoplastic carbon fiber composites. The proposed approach goes beyond traditional methods by integrating advanced damage models and a structured validation process, supported by an extensive experimental test campaign.

We demonstrate the feasibility of determining design allowables through simulation by examining the influence of batch size on both the validation process and the prediction of allowable strength. Our findings provide new insights into the propagation of uncertainties in the context of composite material design, showing that it is possible to achieve reliable design allowables through simulation, which can significantly accelerate the development of new components while maintaining high safety standards.

虽然有多种建模方法可以模拟单搭接剪切结构的强度，但这些方法在获得热塑性复合材料设计允许值方面的应用仍未得到充分探索。本文针对这一空白，提出了一种新方法，利用专门为热塑性碳纤维复合材料定制的先进有限元模型，对参数的不确定性进行前向传播。我们通过研究批量大小对验证过程和允许强度预测的影响，证明了通过模拟确定设计允许值的可行性。我们的研究结果为复合材料设计中不确定性的传播提供了新的见解，表明通过模拟实现可靠的设计允许值是可行的，这可以在保持高安全标准的同时显著加快新部件的开发。

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引用次数: 0

Coupling thermodynamic modelling with experimental study to reveal the evolutionary relationship of pore solutions, products, and compressive strength for lunar regolith simulant geopolymers 将热力学建模与实验研究相结合，揭示月球碎屑岩模拟土工聚合物的孔隙溶液、产物和抗压强度的演化关系

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2024-11-06 DOI: 10.1016/j.compositesb.2024.111949

Guangjie Xue, Guofu Qiao

Alkali-activation is a highly promising approach for the in situ resource utilisation (ISRU) of lunar regoliths. However, the considerable variation in the composition of lunar regolith simulants can complicate the optimal design of geopolymer mixture ratios, necessitating an in-depth analysis of composition–performance correlations. This study proposes a calculation method that couples thermodynamic modelling with an experimental study to reveal the evolutionary relationship between the pore solution, product formation, and compressive strength. The results indicate that the modulus and dosage of the alkali activator can substantially change the relative content of reactive elements in the pore solution and affect the product type and content. Among these, [Si] and [Al] in the pore solution and gel production are key factors affecting the compressive strength of geopolymers. Understanding these composition–performance relationships is critical for offering essential guidance for performance-based, on-demand material design and optimisation.

碱活化是一种非常有前途的月球碎屑原地资源利用（ISRU）方法。然而，月球碎屑模拟物成分的巨大差异会使地聚合物混合物配比的优化设计变得复杂，因此有必要对成分-性能相关性进行深入分析。本研究提出了一种将热力学建模与实验研究相结合的计算方法，以揭示孔隙溶液、产品形成和抗压强度之间的演变关系。结果表明，碱活化剂的模量和用量会大大改变孔隙溶液中活性元素的相对含量，并影响产物的类型和含量。其中，孔隙溶液中的[Si]和[Al]以及凝胶的生成是影响土工聚合物抗压强度的关键因素。了解这些成分与性能之间的关系对于为基于性能的按需材料设计和优化提供重要指导至关重要。

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引用次数: 0

Linear viscoelasticity of anisotropic carbon fibers reinforced thermoplastics: From micromechanics to dynamic torsion experiments 各向异性碳纤维增强热塑性塑料的线性粘弹性：从微观力学到动态扭转实验

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2024-11-06 DOI: 10.1016/j.compositesb.2024.111931

Thomas C. Merlette, Julie Diani

The link between experimental characterization and the constitutive behavior of an anisotropic linear viscoelastic unidirectional carbon fiber-reinforced thermoplastic composite is explored using micromechanics modeling. Dynamic torsion tests were conducted at 1 Hz over a wide temperature range, from the glassy to the rubbery states of the polymeric matrix, on both the pure matrix and the composite, for various cutting angles relative to the fibers. A two-step modeling procedure in the frequency domain is presented to predict and validate the effective behavior of the composite. The first step involves FFT-based homogenization, which maps the microstructure and constituent behaviors to effective transversely isotropic viscoelastic properties. The second step consists of finite element simulations using the effective behavior calculated from homogenization as input to replicate the experiments. A comparison between experimental results and model predictions across the entire temperature range is performed. The modeling predictions show good accuracy at low temperatures, where the matrix is in the glassy state. At high temperatures, where the matrix is in the rubbery state, the predicted behavior becomes too soft. As the phase contrast increases and the ratio of matrix bulk modulus to shear modulus rises significantly, the impact of fiber arrangement on the effective properties becomes more pronounced.

通过微观力学建模探讨了各向异性线性粘弹性单向碳纤维增强热塑性复合材料的实验表征与构成行为之间的联系。在广泛的温度范围内，从聚合物基体的玻璃态到橡胶态，对纯基体和复合材料进行了 1 Hz 的动态扭转试验，并对纤维进行了不同角度的切割。为预测和验证复合材料的有效行为，提出了一个分两步的频域建模程序。第一步是基于 FFT 的均质化，将微观结构和成分行为映射为有效的横向各向同性粘弹特性。第二步是使用均质化计算出的有效行为作为输入进行有限元模拟，以复制实验结果。对整个温度范围内的实验结果和模型预测结果进行了比较。模型预测在基体处于玻璃态的低温下显示出良好的准确性。在高温下，基体处于橡胶状态，预测行为变得过于软弱。随着相位对比度的增加以及基体体积模量与剪切模量之比的显著上升，纤维排列对有效特性的影响变得更加明显。

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引用次数: 0