【新文速递】2024年1月24日复合材料SCI期刊最新文章

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今日更新：Composite Structures 1 篇，Composites Part A: Applied Science and Manufacturing 1 篇，Composites Part B: Engineering 1 篇，Composites Science and Technology 2 篇

Composite Structures

Peridynamics for the fracture study on multi-layer graphene sheets

Xuefeng Liu, Zhiwu Bie, Peng Yu, Baojing Zheng, Xian Shi, Yong Fan, Xiaoqiao He, Chun Lu

doi:10.1016/j.compstruct.2024.117926

多层石墨烯薄片断裂的周动力学研究

Understanding the fracture properties of graphene sheets is a crucial step towards their practical applications. However, due to the limitations of experimental operations and all-atom (AA) methods, investigating the fracture of large-sized nano graphene sheets remains a formidable challenge. Especially, study on the layer-by-layer fracture of multi-layer graphene sheets (MLGS) is nearly impossible. To overcome this challenge, a peridynamic (PD) model is proposed in this study, which comprises the intra-layer part and the inter-layer part. The proposed PD model is validated by comparing the fracture toughness and the fracture forms of MLGS with existing experiments. It is found that the uniaxial tensile stress-strain curve of pre-cracked MLGS is closely related to the number of graphene layers in MLGS. The fracture property of MLGS can be enhanced by increasing the number of graphene layers, reducing the pre-crack length and blunting the pre-crack tip. Notably, asynchronous crack propagation with independent path observed in MLGS is a unique mechanism for strengthening the fracture property, which is distinct from monolayer graphene sheet. In this work, the PD theory is extended for the first time to investigate the in-plane fracture of large-sized nano MLGS.

了解石墨烯片的断裂特性是其实际应用的关键一步。然而，由于实验操作和全原子(AA)方法的限制，研究大尺寸纳米石墨烯片的断裂仍然是一个艰巨的挑战。特别是对多层石墨烯片的逐层断裂进行研究几乎是不可能的。为了克服这一挑战，本文提出了一种由层内部分和层间部分组成的周动力学(PD)模型。通过与现有实验对比MLGS的断裂韧性和断裂形式，验证了所提出的PD模型。研究发现，预裂MLGS的单轴拉伸应力-应变曲线与石墨烯层数密切相关。通过增加石墨烯层数、减小预裂纹长度和钝化预裂纹尖端，可以提高MLGS的断裂性能。值得注意的是，在MLGS中观察到的具有独立路径的异步裂纹扩展是一种独特的增强断裂性能的机制，这与单层石墨烯片不同。本文首次将PD理论扩展到研究大尺寸纳米MLGS的面内断裂。

Composites Part A: Applied Science and Manufacturing

Dual bionic-inspired stretchable strain sensor based on graphene/multi-walled carbon nanotubes/polymer composites for electronic skin

Weiqiang Hong, Xiaohui Guo, Tianxu Zhang, Xiaowen Zhu, Zhe Su, Yuan Meng, Yunong Zhao, Defeng Xu, Juncong Pan, Yinqi Huang, Hao Wang, Kai Xu, Hongyu Dong, Chenghao Zhang, Yanan Li, Xu Yan, Xingchen Huang

doi:10.1016/j.compositesa.2024.108043

基于石墨烯/多壁碳纳米管/聚合物复合材料的电子皮肤双仿生启发可拉伸应变传感器

With the rapid development of wearable electronic devices, stretchable strain sensors with wide strain range, high sensitivity, fast response, and high durability are urgently demanded. Here, a dual bionic-inspired stretchable strain sensor (DBSSS) with fingerprint patterns and biomimetic lotus root fiber structure is proposed. Silicone rubber (SR) is used as the encapsulation layer for the sensor, and multi-walled carbon nanotubes (MWCNT) are used as conductive bridges to connect graphene (GN) nanolaminates. The good cooperation of the two combined conductive materials with the fingerprint pattern structure significantly enhances the sensing function of DBSSS. DBSSS has high sensitivity (GF=35.33), wide strain sensing range (0–145%), fast response (∼80 ms), and good durability (>5000 cycles). Therefore, based on the excellent comprehensive performance of DBSSS, it can accurately realize gesture recognition, human micro-expression monitoring, and Morse code detection, which shows the broad application prospect of electronic skin.

随着可穿戴电子器件的快速发展，对应变范围宽、灵敏度高、响应速度快、耐久性高的可拉伸应变传感器提出了迫切的需求。本文提出了一种具有指纹图案和仿生莲藕纤维结构的双仿生可拉伸应变传感器(DBSSS)。硅橡胶(SR)被用作传感器的封装层，多壁碳纳米管(MWCNT)被用作连接石墨烯(GN)纳米层的导电桥。两种复合导电材料与指纹图案结构的良好配合，显著增强了DBSSS的传感功能。DBSSS具有高灵敏度(GF=35.33)，宽应变传感范围(0-145%)，快速响应(~ 80 ms)和良好的耐久性(>5000次循环)。因此，基于DBSSS优异的综合性能，能够准确实现手势识别、人体微表情监测、莫尔斯电码检测，显示出电子皮肤广阔的应用前景。

Composites Part B: Engineering

Enhanced interfacial property and thermal conductivity of pitch-based carbon fiber/epoxy composites via three-layer assembly of PDI/GN/PDI interphase

Xiaofeng Jiang, Chao Wang, Gang Li, Yunhua Yu, Xiaoping Yang

doi:10.1016/j.compositesb.2024.111238

通过PDI/GN/PDI界面相三层组装提高沥青基碳纤维/环氧复合材料的界面性能和导热性

Π-conjugate perylene diimide (PDI)/graphene (GN)/PDI interphase was designed and constructed on pitch-based carbon fiber (PCF) surface by multi-layer assembly, and the interfacial and thermal conductive performances of PCF/Epoxy (EP) composites with PDI, PDI/GN and PDI/GN/PDI interphase were investigated. Flat nanoscale structures with fragmented and wrinkled GN, PDI nanowires were respectively observed on PCF-GN, PCF-PDI/GN and PCF-PDI surface, while three-dimensional oblique cicada-wing nanostructure of three-layer interphase was constructed on PCF-PDI/GN/PDI surface due to the re-assembly of PDI under confinement constraint of GN substrate. Interlayer shear strength and transverse fiber bundle tensile strength of PCF-PDI/GN/PDI/EP composite were 28.4 %, 9.36 %, 12.0 % and 246 %, 85.8 %, 116 % higher than those of PCF-GN/EP, PCF-PDI/GN/EP and PCF-PDI/EP composites, which were attributed to the improvement of interface adhesion and the effectively buffer stress transfer between carbon fiber and resin matrix by introducing three-layer PDI/GN/PDI interphase. Additionally, PCF-PDI/GN/PDI/EP composites showed the highest heat conduction and thermal conductivity, ascribing to the construction of extra conductive paths and the weakening of phonons scattering from three-dimensional (3D) structure of PDI/GN/PDI interphase, which realized the formation of structure-function integration interphase of pitch-based carbon fiber composites.

通过多层组装在沥青基碳纤维(PCF)表面设计并构建了苝二酰亚胺(PDI)/石墨烯(GN)/PDI界面相Π-conjugate，研究了PDI、PDI/GN和PDI/GN/PDI界面相的PCF/环氧树脂(EP)复合材料的界面性能和导热性能。在PCF-GN、PCF-PDI/GN和PCF-PDI表面分别观察到碎片化和褶皱化的GN、PDI纳米线的扁平纳米结构，而在GN衬底约束下，PDI在PCF-PDI/GN/PDI表面进行了重新组装，形成了三层界面相的三维斜蝉翼纳米结构。PCF-PDI/GN/PDI/EP复合材料的层间抗剪强度和横向纤维束抗拉强度分别比PCF-GN/EP、PCF-PDI/GN/EP和PCF-PDI/EP复合材料分别提高28.4 %、9.36 %、12.0 %和246 %、85.8 %、116 %，这是由于引入三层PDI/GN/PDI界面相，提高了界面附着力，有效缓冲了碳纤维与树脂基体之间的应力传递。此外，PCF-PDI/GN/PDI/EP复合材料表现出最高的导热性和导热性，这是由于PDI/GN/PDI界面相的额外导电路径的构建和三维(3D)结构声子散射的减弱，实现了沥青基碳纤维复合材料结构-功能集成界面的形成。

Composites Science and Technology

Superior thermal transport and electrically insulating properties of epoxy composites with waxberry-like calcined alumina/poly diallyldimethylammonium chloride/diamond

Zhengdong Wang, Yuanhang Zhou, Meng Luo, Yumeng Zhang, Xiaolong Cao, Ziyan Zhang, Ran Wang, Xuefeng Zhang

doi:10.1016/j.compscitech.2024.110440

杨梅状煅烧氧化铝/聚二烯基二甲基氯化铵/金刚石环氧复合材料优越的热传递和电绝缘性能

This work reported a novel preparation of waxberry-like calcined alumina/poly diallyldimethylammonium chloride/diamond (AO*@ND) via a facile self-assembly of cationic polymer, electrostatic adsorption of nano-sized diamonds and calcination process. The incorporation of hybrid particles into an epoxy matrix significantly enhanced the thermal conductivity and dielectric properties. For example, the thermal conductivity of epoxy composite with 10 wt% calcined AO*@ND in air at 500 °C soars to a remarkable level of 0.70 W/(m·K) and 1.83 W/(m·K) at room temperature and 100 °C, respectively. In addition, its dielectric breakdown strength was 59.6 kV/mm, only showing a decrease of 11 % compared to that of epoxy. More importantly, the epoxy composites with the calcined AO*@ND showed an ultralow dielectric loss. The modification strategy of hybrid filler provides a new insight on the development of thermally conductive yet electrically insulating materials for future power modules and electrical equipment.

本文报道了一种通过阳离子聚合物的自组装、纳米金刚石的静电吸附和煅烧工艺制备杨梅状煅烧氧化铝/聚二烯基二甲基氯化铵/金刚石(AO*@ND)的新方法。将杂化颗粒掺入环氧树脂基体中，显著提高了其导热性和介电性能。例如，添加10 wt% AO*@ND的环氧复合材料在500℃空气中，室温和100℃时的导热系数分别达到0.70 W/(m·K)和1.83 W/(m·K)。此外，其介电击穿强度为59.6 kV/mm，仅比环氧树脂降低11%。更重要的是，经过煅烧的AO*@ND的环氧复合材料具有超低的介电损耗。混合填料的改性策略为未来电源模块和电气设备的导热绝缘材料的发展提供了新的思路。

Navigating the unknown: Tackling high-dimensional challenges in composite damage modeling with bootstrapping and Bayesian uncertainty quantification

Giuseppe Catalanotti

doi:10.1016/j.compscitech.2024.110462

导航未知:利用自举和贝叶斯不确定性量化解决复合材料损伤建模中的高维挑战

A methodology for quantifying uncertainty in high-dimensional problems involving sophisticated progressive damage models for composites is proposed. This approach combines bootstrapping and Bayesian Uncertainty Quantification to determine the distribution of Quantities of Interest typically related to structural response. Applied to a practical case involving a 40-dimensional problem with Open Hole Tension and Compression specimens, where stochastic variables include material and geometric parameters, as well as ply orientations, the methodology efficiently provides consistent predictions of QoI distributions. Its effectiveness makes it highly suitable for real industrial applications, enhancing capabilities in the design of composite structures.

提出了一种量化复合材料复杂渐进损伤模型高维问题不确定性的方法。这种方法结合了自举和贝叶斯不确定性量化来确定通常与结构响应相关的兴趣量的分布。将该方法应用于40维裸眼拉伸和压缩样品问题的实际案例，其中随机变量包括材料和几何参数以及层向，该方法有效地提供了qi分布的一致预测。它的有效性使其非常适合于实际工业应用，提高了复合材料结构设计的能力。

来源：复合材料力学仿真Composites FEM

【新文速递】2024年1月27日复合材料SCI期刊最新文章

今日更新：Composites Part A: Applied Science and Manufacturing 1 篇，Composites Science and Technology 1 篇Composites Part A: Applied Science and ManufacturingImproving carbon fibre reinforced polyphenylene sulfide using amine and phenolic interphase modificationsSameh Dabees, Ameya Borkar, Ben Newman, Žan Simon, David J. Hayne, Peirs Coia, Luke C. Hendersondoi:10.1016/j.compositesa.2024.108045用胺和酚类间相改性改进碳纤维增强聚苯硫醚In this study, a straightforward in-situ surface modification procedure was used to enhance the interfacial adhesion of carbon fibre (CF)-reinforced polyphenylene sulfide (PPS). To do this, 4-nitroaniline and 4-aminophenol were grafted to the surface of carbon fibres. The goal was to capitalise on the hydrogen bonding capability of the grafted molecules with the exposed sulphur groups present in the polymer backbone of PPS. This modification has resulted in a notable enhancement in both the tensile and flexural strength of the PPS/CF composite, with an increase of 12.3% and 19.3%, respectively. Moreover, tensile, and flexural modulus has been increased by 15% and 16%, respectively. Scanning electron microscopy (SEM) examinations confirm that the treated CF contributes to the facilitation of a more homogeneous stress distribution throughout the matrix. This serves to alleviate stress concentrations that may arise at certain spots, reducing the probability of premature failure or crack formation. Counterintuitively, the amino grafted fibres outperformed the phenolic enriched fibres, despite the amine having a lower potential for hydrogen bonding. We propose that the sulphur atom within the PPS polymer presents an opportunity for hydrogen bonding but also a currently underutilised interaction, σ*-bonding, that could be capitalised on to enhance thermoplastic composite performance. Furthermore, the achievement of effectively preparing a modified CF surface offers valuable insights into the development of high-performance thermoplastic composites using easily accessible materials via a straightforward method.在这项研究中，采用了一种简单的原位表面改性方法来增强碳纤维(CF)增强聚苯硫醚(PPS)的界面附着力。为此，4-硝基苯胺和4-氨基酚被接枝到碳纤维表面。目的是利用接枝分子的氢键能力，暴露硫基团存在于PPS的聚合物主链中。改性后的PPS/CF复合材料的拉伸强度和弯曲强度均显著提高，分别提高了12.3%和19.3%。此外，拉伸模量和弯曲模量分别提高了15%和16%。扫描电镜(SEM)检查证实，经过处理的CF有助于促进整个基质中更均匀的应力分布。这有助于减轻在某些点可能出现的应力集中，减少过早失效或裂纹形成的可能性。与直觉相反，氨基接枝纤维的性能优于酚类纤维，尽管胺具有较低的氢键电位。我们提出，PPS聚合物中的硫原子为氢键提供了机会，但也为目前未充分利用的相互作用σ*键提供了机会，这可以用来提高热塑性复合材料的性能。此外，有效制备改性CF表面的成就为通过简单的方法使用易于获取的材料开发高性能热塑性复合材料提供了有价值的见解。Composites Science and TechnologyElectrical and thermal behaviour of Z-pin reinforced carbon-fibre composite laminates under fault currentsMudan Chen, Zhaobo Zhang, Bing Zhang, Giuliano Allegri, Xibo Yuan, Stephen R. Hallettdoi:10.1016/j.compscitech.2024.110466 z针增强碳纤维复合材料层合板在故障电流下的电学和热行为Carbon-fibre reinforced polymer (CFRP) composites typically have poor electrical conductivity, primarily due to the conductive carbon fibres being separated by the insulating polymer matrix material. This is even more so in the case of interlayer toughened material systems that have an increased interlaminar spacing between the conductive carbon fibre layers. To mitigate the poor electrical conductivity of CFRP composites, the behaviour of Z-pinned laminates under electrical current was here studied experimentally. The in-plane and through-thickness fault currents were investigated for a quasi-isotropic (QI) composite laminate made from M21/IMA prepreg. Two kinds of pin materials (T300/BMI composite and copper) were used at two different volume fractions (0.1 % and 0.25 %). The pins reduced the through-thickness current resistance by two orders of magnitude, with a much smaller data variation, and up to one order for the in-plane direction. Through the use of electrically insulated pins, it was found that the electrical conductivity enhancement is caused by the fibre crimping around the pin and is unrelated to the pin material. Z-pins decreased the temperature increment caused by Joule heating during fault currents, thereby ensuring structural safety.碳纤维增强聚合物(CFRP)复合材料通常具有较差的导电性，主要是由于导电碳纤维被绝缘聚合物基体材料隔开。在导电碳纤维层之间的层间间距增加的层间增韧材料系统中更是如此。为了缓解CFRP复合材料导电性差的问题，对z -钉压层合板在电流作用下的性能进行了实验研究。研究了M21/IMA预浸料制备的准各向同性(QI)复合层压板的面内和通层故障电流。采用两种不同体积分数(0.1 %和0.25 %)的引脚材料(T300/BMI复合材料和铜)。引脚将通厚电流电阻降低了两个数量级，数据变化小得多，而平面内方向的电流电阻则降低了一个数量级。通过使用电绝缘引脚，发现导电性的增强是由引脚周围的纤维卷曲引起的，与引脚材料无关。z引脚减小了故障电流时焦耳加热引起的温升，保证了结构的安全。来源：复合材料力学仿真Composites FEM