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【新文速递】2024年2月8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 1 篇

Composite Structures

Dynamic crushing performance of foam-filled periodic hybrid cellular structures

Ting Liu, Changhai Chen, Yuansheng Cheng

doi:10.1016/j.compstruct.2024.117952

泡沫填充周期性混合蜂窝结构的动态挤压性能

To achieve excellent dynamic crushing performance, an attractive foam-filled periodic hybrid cellular (F-PHC) structure containing both hexagonal and re-entrant cells was designed and fabricated. Dynamic crushing experiments for foam-filled PHC structures were carried out using a direct impact Kolsky bar testing system. Reliable numerical simulations using both finite element method and smoothed particle hydrodynamics method were developed to analyze the dynamic crushing responses of F-PHC structures in the full range of deformation processes. Effects of inertia, strain-rate sensitivity, cell number, and impact velocity were evaluated. The results show that the dynamic plateau stresses of periodic hybrid cellular structures can be substantially enhanced by filling foams. The dynamic crushing response of F-PHC structure is very susceptible to impact velocity due to inertia effect. Compared with foam-filled hexagonal honeycomb and foam-filled re-entrant honeycomb structures, F-PHC structures exhibited superior dynamic crushing performances, including smoother and longer dynamic plateau stresses, more uniform deformation distributions, and much more stable deformation processes. Moreover, F-PHC structures exhibited much lower dynamic initial peak stresses at the rear face. This study provides a fascinating design idea and shines light on attractive F-PHC structures with a promising application prospect in the field of impact protection.

为了实现出色的动态破碎性能,我们设计并制造了一种极具吸引力的泡沫填充周期性混合蜂窝(F-PHC)结构,其中既包含六边形蜂窝,也包含重入式蜂窝。使用直接冲击 Kolsky 棒测试系统对泡沫填充 PHC 结构进行了动态破碎实验。采用有限元法和平滑粒子流体力学法进行了可靠的数值模拟,以分析 F-PHC 结构在各种变形过程中的动态挤压响应。对惯性、应变速率敏感性、单元数和冲击速度的影响进行了评估。结果表明,填充泡沫可大幅提高周期性混合蜂窝结构的动态高原应力。由于惯性效应,F-PHC 结构的动态挤压响应非常容易受到冲击速度的影响。与填充泡沫的六边形蜂窝结构和填充泡沫的重入角蜂窝结构相比,F-PHC 结构表现出更优越的动态挤压性能,包括更平滑、更长的动态高原应力,更均匀的变形分布,以及更稳定的变形过程。此外,F-PHC 结构在后端面表现出更低的动态初始峰值应力。这项研究提供了一种令人着迷的设计思路,并揭示了极具吸引力的 F-PHC 结构,在冲击防护领域具有广阔的应用前景。


Composites Part A: Applied Science and Manufacturing

Predicting the geometric morphology of water jet machining in ultra-thick CFRP laminates based on analytical modeling

Liang Wei, Dong Huiyue, Miao Lei, Xu Xiaokang, Cheng Liang, Guo Yingjie, Ke Yinglin

doi:10.1016/j.compositesa.2024.108055

基于分析建模预测超厚 CFRP 层压板水射流加工的几何形态

The kerf taper and cutting front drag are crucial factors limiting the abrasive waterjet (AWJ) machining of ultra-thick CFRP laminates. Therefore, this study investigated the variation patterns of kerf width and maximum cutting front drag with process parameters and established predictive models. The models accurately predicted kerf entrance width, kerf exit width, and maximum cutting front drag with R-squares of 0.9881, 0.9761, and 0.9791. Moreover, the influence of the key kinematic parameter of complex structure manufacturing - the jet impact angle on the kerf profile was analyzed from a geometric analysis. A numerical regression approach was employed to derive an energy dissipation function for CFRP laminate processing. A semi-analytical mathematical model was established based on energy balance theory. Under arbitrary jet impact angle, the kerf profiles on both sides are predicted with R-square of 0.9455 and 0.9525 respectively, and the cutting front drag profile is predicted with R-square of 0.9078.

切口锥度和切割前阻力是限制加砂水刀(AWJ)加工超厚 CFRP 层压板的关键因素。因此,本研究调查了切口宽度和最大切割前阻力随工艺参数的变化规律,并建立了预测模型。模型准确预测了切口入口宽度、切口出口宽度和最大切削前阻力,R-squares 分别为 0.9881、0.9761 和 0.9791。此外,还从几何分析的角度分析了复杂结构制造的关键运动参数--射流冲击角对切口轮廓的影响。采用数值回归方法得出了 CFRP 层压板加工的能量耗散函数。根据能量平衡理论建立了半解析数学模型。在任意射流冲击角度下,两侧切口轮廓的预测 R 方分别为 0.9455 和 0.9525,切削前阻力轮廓的预测 R 方为 0.9078。


Composites Part B: Engineering

Stability of crystallographic texture and mechanical anisotropy toward Al2O3/YAG eutectic ceramic composite using single crystalline seeds

Yuan Liu, Haijun Su, Xue Tan, Zhonglin Shen, Xiang Li, Hao Jiang, Di Zhao, Yinuo Guo, Zhuo Zhang, Min Guo

doi:10.1016/j.compositesb.2024.111263

使用单晶种子实现 Al2O3/YAG 共晶陶瓷复合材料结晶纹理和机械各向异性的稳定性

During the directional solidification of Al2O3-based eutectic ceramic composites, crystallographic orientation control is a promising method for tailoring the performances of composite parts. However, despite its importance in the fabrication of texture-controlled structural parts, the stable growth of the eutectic crystallographic texture for long distance (growth distance from 30 mm to 120 mm) in ceramic composite system is not widely understood. Herein, the competition and stability of crystallographic texture for Al2O3/YAG eutectic ceramic composite induced by different seeds using the Czochralski (CZ) technique were investigated. When the eutectic composites induced by different single crystalline Al2O3 seeds, coarse Al2O3 particles and uniform eutectic structure appeared alternately below the seeds. While the eutectic ceramic composite induced by YAG seed has a memory effect on the stability of its microstructure and morphology. We demonstrated that the eutectic ceramic composites induced by the〈112¯0〉Al2O3 and 101¯0〉Al2O3 seeds could stably inherit the seed orientation and grow as a single crystallographic texture with a low interfacial strain (<10 %). In particular, the stable evolution of crystallographic texture depended not only on the type of seeds but also on the mutual constraint of eutectic coupling growth. Furthermore, the nano-hardness, elastic modulus, and compressive strength (1600 °C) of the composites induced by different seeds have anisotropic characteristics. However, the bending strength was not sensitive to the change of crystallographic texture. It could maintain excellent high temperature stability, which was approximately 265∼316 MPa from room temperature to 1600 °C. These results promote the development of high-performance Al2O3-based eutectic ceramic composites with anisotropic design using seeding technique to tailor their crystallographic texture.

在基于 Al2O3 的共晶陶瓷复合材料的定向凝固过程中,晶体取向控制是一种很有前途的定制复合材料部件性能的方法。然而,尽管结晶取向控制在制造纹理控制结构件方面具有重要意义,但陶瓷复合材料体系中长距离(生长距离从 30 毫米到 120 毫米)共晶结晶纹理的稳定生长还没有得到广泛的了解。本文采用 Czochralski(CZ)技术研究了不同种子诱导的 Al2O3/YAG 共晶陶瓷复合材料结晶纹理的竞争性和稳定性。当不同单晶 Al2O3 种子诱导共晶复合材料时,种子下方交替出现粗 Al2O3 颗粒和均匀的共晶结构。而 YAG 种子诱导的共晶陶瓷复合材料对其微观结构和形态的稳定性具有记忆效应。我们证明了由〈112¯0〉Al2O3 和〈101¯0〉Al2O3 种子诱导的共晶陶瓷复合材料可以稳定地继承种子的取向,并在较低的界面应变(<10%)下生长为单一的晶体纹理。特别是,晶体纹理的稳定演化不仅取决于种子的类型,还取决于共晶耦合生长的相互制约。此外,不同种子诱导的复合材料的纳米硬度、弹性模量和抗压强度(1600 °C)具有各向异性特征。然而,弯曲强度对结晶纹理的变化并不敏感。它能保持极佳的高温稳定性,从室温到 1600 ℃ 的高温稳定性约为 265 ∼ 316 MPa。这些结果促进了利用播种技术定制结晶纹理的各向异性设计的高性能 Al2O3 基共晶陶瓷复合材料的发展。


Composites Science and Technology

Structure-property relationship between lignin structures and properties of 3D-printed lignin composites

Shuyang Zhang, Anqi Ji, Xianzhi Meng, Samarthya Bhagia, Chang Geun Yoo, David P. Harper, Xianhui Zhao, Arthur J. Ragauskas

doi:10.1016/j.compscitech.2024.110487

 

木质素结构与三维打印木质素复合材料性能之间的结构-性能关系

Lignin is a low-cost and renewable bioresource with a huge annual production promising to prepare sustainable materials. However, the poor interfacial adhesion between many lignin-polymer pairs deteriorates the mechanical performance of the composites, which seriously limits the application of lignin in 3D printing via fused depositional modeling. This work examined lignin-polyamide 12 (PA 12) intermolecular interactions (e.g., hydrogen bonding) to address the interface challenge. To realize this goal, the phenolic hydroxyl content was increased on kraft softwood lignin by a LiBr/HBr demethylation procedure, increasing phenoxy content by 61.7%. Increased hydrogen bonding interactions between modified lignin (Pine-Lig-OH) and PA 12 demonstrated a significantly improved molten dynamic modulus by rheological analysis. Regarding mechanical properties, by adding 20 wt% of Pine-Lig-OH, the tensile strength and Young's modulus reached 46.6 MPa and 1.62 GPa, 30.2% and 33.9% higher than PA 12, respectively. Further morphological analysis proved the interfacial interactions are enhanced by showing the difference in the phase gaps. The dynamic mechanical analysis (DMA) supported the conclusion that Pine-Lig-OH could interact with polymer chains, alternating segmental movements due to the strong interaction. This study presents a method to enhance lignin composite properties by promoting interactions with the polymer matrix through modified functional groups, guiding future lignin composite research.

木质素是一种低成本、可再生的生物资源,年产量巨大,有望制备可持续材料。然而,许多木质素-聚合物对之间的界面粘附性较差,会降低复合材料的机械性能,这严重限制了木质素通过熔融沉积模型在三维打印中的应用。这项工作研究了木质素-聚酰胺 12(PA 12)的分子间相互作用(如氢键),以解决界面难题。为实现这一目标,采用 LiBr/HBr 脱甲基工艺增加了牛皮纸软木木质素的酚羟基含量,使苯氧基含量增加了 61.7%。通过流变学分析,改性木质素(Pine-Lig-OH)和 PA 12 之间氢键相互作用的增加显著提高了熔融动态模量。在机械性能方面,添加 20 wt% 的松脂-木质素-OH 后,拉伸强度和杨氏模量分别达到 46.6 MPa 和 1.62 GPa,比 PA 12 分别高出 30.2% 和 33.9%。进一步的形态分析表明,相隙的差异证明了界面相互作用的增强。动态机械分析(DMA)证实了松-lig-OH 可与聚合物链相互作用,由于相互作用强烈,聚合物链段会交替运动。本研究提出了一种通过改性官能团促进与聚合物基体相互作用来增强木质素复合材料性能的方法,为未来的木质素复合材料研究提供了指导。



来源:复合材料力学仿真Composites FEM
ACTMechanicalSystemDeform复合材料UG理论材料控制
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首次发布时间:2024-11-06
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【新文速递】2024年1月23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Composite StructuresCARBON FABRIC REINFORCED CEMENTITIOUS MORTAR CONFINEMENT OF CONCRETE CYLINDERS: THE MATRIX EFFECT FOR MULTI-PLY WRAPPINGAlessio Cascardi, Salvatore Verre, Luciano Ombres, Maria Antonietta Aiellodoi:10.1016/j.compstruct.2024.117919碳纤维布增强水泥砂浆约束混凝土圆柱体:多层包覆的基体效应The confinement of columns is one of the most used strengthening techniques for reinforced concrete (RC) framed structures being able to improve both the axial strength and ductility. In the last decades, technological advances provided different tools/solutions for the achievement of an effective confinement, among all: the RC-jacket, the steel ties, the fibre reinforced polymer (FRP) wrapping, and lastly the fabric reinforced cementitious mortar (FRCM) plastering. The proposed research aims to investigate two open-issues and their combination related to the use of the FRCM, such as the multi-ply confinement and the role of the inorganic matrix with respect to the confinement effectiveness. At this scope, a set of pure compression tests were carried out to evaluate the representative laws of the mechanical behaviour of confined columns, namely the axial stress versus axial/lateral strain. Consequently, the axial strength and ductility gains were computed. In particular, the investigated variables were the grade of the inorganic matrix, by varying its compressive strength (i.e. ∼25 MPa and ∼50 MPa), and the number of plies (i.e. 1, 2 and 3). The results showed that the higher gain in term of axial strength and ductility is met by increasing the mortar’s compressive/tensile strength and, at the same time, the number of plies. Lastly, available design-oriented analytical models were found able to predict the FRCM-confinement effect in terms of strength. In addition, an available analysis-oriented model accurately foreseen the axial stress-strain law when dealing with the high-grade strength matrix confining in both single, double and triple layer of FRCM-system.柱约束是钢筋混凝土框架结构中最常用的加固技术之一,可以提高结构的轴向强度和延性。在过去的几十年里,技术的进步为实现有效的限制提供了不同的工具/解决方案,其中包括:rc护套,钢带,纤维增强聚合物(FRP)包裹,最后是织物增强水泥砂浆(FRCM)抹灰。提出的研究旨在调查与FRCM使用相关的两个开放问题及其组合,例如多层约束和无机基质在约束有效性方面的作用。在此范围内,进行了一组纯压缩试验,以评估承压柱力学行为的代表性规律,即轴向应力与轴向/侧应变的关系。因此,计算了轴向强度和延性增益。特别是,研究的变量是无机基质的等级,通过改变其抗压强度(即~ 25 MPa和~ 50 MPa)和层数(即1、2和3)。结果表明,通过增加砂浆的抗压/抗拉强度,同时增加层数,可以实现更高的轴向强度和延性增益。最后,发现现有的面向设计的分析模型能够在强度方面预测frp - cm约束效应。此外,现有的面向分析的模型在处理单层、双层和三层frcm体系的高等级强度矩阵时,都能准确预测轴向应力-应变规律。Preparation and performance enhancement of n-eicosane/polyvinyl alcohol/MXene flexible phase change composites with sandwich structureJinlong Zheng, Yong Deng, Dajun Luo, Fuzhong Wu, Xinyi Daidoi:10.1016/j.compstruct.2024.117930夹心结构正二糖烷/聚乙烯醇/MXene柔性相变复合材料的制备及性能增强In this work, flexible n-eicosane (C20)/polyvinyl alcohol (PVA)/MXene flexible composite PCMs (CPM fc-PCMs) with sandwich structure were designed and prepared. The sandwich structure was prepared by layer-by-layer coating, which was beneficial for enhancing performance of flexible phase change composites. Specifically, the sandwich structure of CPM fc-PCMs could effectively solve the leakage and poor thermal reliability of C20, while significantly improving their thermal storage, mechanical and photothermal conversion performance. The results showed that CPM fc-PCMs had high heat storage capacities, and the maximum latent heat reached □157.43 J/g. It was worth noting that the decrease of latent heat of 1CPM70 after 200 phase transition cycles was 2.58 %, showing good thermal reliability due to the micro-morphology and microstructure of CPM fc-PCMs. The addition of MXene with rich surface functional groups could provide hydrogen bonding sites to enhance the bond between layers, so that the CPM fc-PCMs demonstrated excellent flexibility and mechanical performance (□16.65 MPa). MXene could effectively improve the light-to-heat conversion ability of CPM fc-PCMs, indicating that the CPM fc-PCMs had a good temperature regulation ability in the thermal management of human wearable clothing. In addition, the CPM fc-PCMs demonstrated good thermal stability by TG analysis.本文设计并制备了具有夹层结构的柔性正二十烷(C20)/聚乙烯醇(PVA)/MXene复合材料(CPM fc-PCMs)。采用逐层涂覆的方法制备夹层结构,有利于提高柔性相变复合材料的性能。具体而言,CPM fc- pcm的夹层结构可以有效解决C20的泄漏和热可靠性差的问题,同时显著提高其储热、机械和光热转换性能。结果表明:CPM fc- pcm具有较高的储热能力,最大潜热可达□157.43 J/g;值得注意的是,经过200次相变循环后,1CPM70的潜热下降幅度为2.58 %,由于CPM fc- pcm的微观形貌和微观结构,表现出良好的热可靠性。表面官能团丰富的MXene的加入可以提供氢键位点,增强层间的键合,使得CPM fc- pcm具有优异的柔韧性和力学性能(□16.65 MPa)。MXene能有效提高CPM fc- pcm的光热转换能力,说明CPM fc- pcm在人体可穿戴服装热管理中具有良好的温度调节能力。此外,热重分析表明,CPM fc-PCMs具有良好的热稳定性。A New Mechanism Based Cohesive Zone Model for Mode I Delamination Coupled with Fiber Bridging of Composite LaminatesQingfeng Duan, Haixiao Hu, Dongfeng Cao, Wei Cai, Shuxin Lidoi:10.1016/j.compstruct.2024.117931基于新机制的复合材料层合板I型剥离与纤维桥接的内聚区模型Based on identification of the two distinguishing delamination mechanisms within the two delamination zones associated with Mode I fracture toughness testing of composite laminates using the well-known ASTM standard double cantilever specimen (DCB), a new mechanism based cohesive zone model (MB-CZM) is proposed in this work. Overcoming the limitations with the widely used superposed cohesive zone models, the proposed MB-CZM develops two traction-separation relations to individually represent the two distinctive delamination mechanisms. One for the quasi-brittle linear elastic behavior of composite material and another for the nonlinear characteristics of fiber bridging which is commonly simplified with tri-linear to multi-linear approximation in the previous cohesive zone models (CZMs). Energy decomposition is carried out based on different damage and toughening mechanisms associated with delamination initiation and propagation. The proposed new MB-CZM is implemented in the finite element analysis via two UMAT subroutines and used in the numerical simulations. The good agreement of the simulation results with the experimental results provides the verification and demonstration of the capabilities of the proposed MB-CZM.基于ASTM标准双悬臂试件(DCB)复合材料层合板I型断裂韧性测试中两个分层区中两种不同的分层机制,提出了一种新的基于机制的内聚区模型(MB-CZM)。克服了广泛使用的叠加内聚带模型的局限性,提出的MB-CZM模型建立了两种牵引-分离关系,分别代表了两种不同的分层机制。一种是复合材料的准脆性线弹性行为,另一种是纤维桥接的非线性特性,这种非线性特性在以往的黏聚区模型中通常被简化为三线性到多线性近似。能量分解是基于与分层萌生和扩展相关的不同损伤和增韧机制。提出的新MB-CZM通过两个UMAT子程序在有限元分析中实现,并用于数值模拟。仿真结果与实验结果吻合较好,验证了所提出的MB-CZM的性能。Composites Part A: Applied Science and ManufacturingHollow glass microsphere/polydopamine/glass fiber reinforced composites with high thermal insulation performance by inhibiting conductive and radiative heat transferAhram Jeong, Seung Mo Son, Suyeon Lee, Dong Gi Seongdoi:10.1016/j.compositesa.2024.108041中空玻璃微球/聚多巴胺/玻璃纤维增强复合材料通过抑制导热和辐射传热而具有高绝热性能Glass fiber-reinforced polymer (GFRP) is commonly used as an insulating lightweight material because of low thermal conductivity. Due to the increasing demand for lightweight composites with the extreme thermal insulation properties, a highly insulating composite was proposed with inhibiting both conductive and radiative heat transfer. We embedded hollow glass microspheres (HGMs), as a conductive heat transfer inhibitor, onto glass fiber by leveraging the adhesive properties and black color of polydopamine, as a radiative heat transfer inhibitor. The new GFRP integrated with polydopamine and HGMs improved thermal insulation properties by 14% compared with neat GFRP and infrared blocking performance while increasing interlaminar and impact strengths by 48.7%, 28.4% and maintaining similar tensile and compressive strengths. Moreover, it improved flame retardant properties with 27.1% reduction in heat release rate and 25 s of ignition time delay. Based on the excellent multi-functions, it can be applied to industries such as cryogenic container parts.玻璃纤维增强聚合物(GFRP)由于其导热系数低,通常被用作绝缘轻质材料。由于对具有极端隔热性能的轻质复合材料的需求日益增加,提出了一种既能抑制导热又能抑制辐射传热的高隔热复合材料。我们利用聚多巴胺作为一种辐射传热抑制剂的粘附特性和黑色,将作为传导传热抑制剂的中空玻璃微球(HGMs)嵌入到玻璃纤维上。与纯GFRP相比,添加聚多巴胺和hgm的新型GFRP的隔热性能和红外阻隔性能提高了14%,层间强度和冲击强度分别提高了48.7%和28.4%,并保持了相似的拉伸和抗压强度。此外,它还能提高阻燃性能,放热率降低27.1%,点火时间延迟25 s。基于其优异的多功能,可应用于低温容器零件等行业。A novel prediction method for nanoplatelets content dependent yield strength of graphene nanoplatelets reinforced metal matrix composites at different temperaturesPan Dong, Mengqing Yang, Jianzuo Ma, Shifeng Zheng, Weiguo Li, Wenli Pidoi:10.1016/j.compositesa.2024.108038 石墨烯纳米片增强金属基复合材料在不同温度下屈服强度随纳米片含量的预测方法Especially, the quantitative relationship between the thickness and volume fraction of graphene and the grain size of graphene nanoplatelets reinforced metal matrix composites was revealed, based on which the influence of grain refinement, load transfer and dislocation strengthening on the yield strength of composites and their evolution with temperature was quantitatively characterized. Furthermore, by introducing the weakening effect of graphene agglomeration on associated control mechanism of yield strength, a prediction model of temperature dependent yield strength of graphene nanoplatelets reinforced metal matrix composites was established. The proposed prediction approach is verified by comparing the predictions with the experimental data in other literature. Moreover, using the established model, the quantitative effects of length and thickness of nanoplatelets on the yield strength of composites and their evolution with temperature were carried out. This research also provides an effective method for investigating the optimal volume fraction and failure volume fraction of added graphene.特别是揭示了石墨烯的厚度和体积分数与石墨烯纳米片增强金属基复合材料晶粒尺寸之间的定量关系,在此基础上定量表征了晶粒细化、载荷传递和位错强化对复合材料屈服强度的影响及其随温度的演变规律。在此基础上,引入石墨烯团聚弱化对屈服强度的相关控制机理,建立了石墨烯纳米片增强金属基复合材料屈服强度的温度依赖预测模型。通过与其他文献的实验数据进行比较,验证了所提出的预测方法。利用所建立的模型,定量分析了纳米薄片长度和厚度对复合材料屈服强度的影响及其随温度的变化规律。该研究也为研究添加石墨烯的最佳体积分数和失效体积分数提供了有效的方法。来源:复合材料力学仿真Composites FEM

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