【新文速递】2024年1月28日复合材料SCI期刊最新文章
今日更新：Composites Part A: Applied Science and Manufacturing 4 篇，Composites Part B: Engineering 1 篇，Composites Science and Technology 1 篇
Composites Part A: Applied Science and Manufacturing
Experimental and numerical investigation of mesoscopic damage accumulation in adhesively bonded composite scarf joints
Sota Oshima, Satoshi Kobayashi
doi:10.1016/j.compositesa.2024.108036
粘接复合材料围缝细观损伤累积的实验与数值研究
Mesoscopic damage accumulation in adhesively bonded composite scarf joints until final failure was investigated for a comprehensive understanding of the damage and failure processes. The damage accumulation in scarf joints with different scarf angles and stacking sequences was characterized by several in situ techniques, such as optical microscopy, high-speed photography, and acoustic emission testing. In addition, progressive damage analysis was carried out to understand the stress state depending on damage using the finite element method with stress triaxiality-dependent yield and damage models. Transverse cracks appeared in composite adherends because of local stress concentration near the end of the 0°layers. The final failure was triggered by the interfacial crack growth between the 0°and 90°layers initiated from the transverse cracks. Numerical simulation results showed that the presence of transverse cracks largely affects the stress distribution in the adhesive layer.
为了全面了解胶结复合材料接头的损伤和破坏过程，研究了胶结复合材料接头在最终破坏之前的细观损伤积累。采用光学显微镜、高速摄影和声发射测试等现场技术，对不同搭接角度和搭接顺序的搭接接头损伤累积进行了表征。此外，采用应力三轴相关屈服和损伤模型的有限元方法，进行渐进损伤分析，了解随损伤变化的应力状态。由于0°层末端附近的局部应力集中，复合材料粘附体出现横向裂纹。最终破坏是由横向裂纹引起的0°和90°层之间的界面裂纹扩展引起的。数值模拟结果表明，横向裂纹的存在很大程度上影响了粘接层的应力分布。
Novel bio-based nanosheets: Improving the fire safety, electromagnetic shielding and mechanical properties of polylactic acid
Yaru Sun, Bin Yu, Yan Liu, Bo Cheng, Jun Wang, Junbo Yan, Fenglei Huang
doi:10.1016/j.compositesa.2024.108044
新型生物基纳米片:提高聚乳酸的防火、电磁屏蔽和力学性能
In this study, a bio-based additive nanosheet (PP-Fe) with multifunctionality was synthesized using self-assembly technology. The multidisciplinary performance of polylactic acid (PLA) composites with addition of PP-Fe was explored, including fire safety, mechanical properties, ultraviolet resistance (UV), electromagnetic interference (EMI) shielding, and flame retardancy. Good dispersion and interfacial compatibility of PP-Fe give its PLA nanocomposites excellent properties. Loading of 20.0 wt% PP-Fe nanosheets on PLA resulted in significant reductions in the maximum heat release rate (72.7%), total heat release (41.6%), and total smoke production (64.7%). More important, the ultraviolet protection factor (UPF) value for the PLA/20PP-Fe composite was 120%, which is categorized as excellent UV-shielding. In general, traditional flame-retardant approaches significantly reduce mechanical performance. Compared to neat PLA, PLA/20PP-Fe exhibited reinforced mechanical properties. The mechanism of the improved multi-performance of the PLA nanocomposite was also determined.
本研究采用自组装技术合成了具有多种功能的生物基添加剂纳米片(PP-Fe)。探讨了添加PP-Fe的聚乳酸(PLA)复合材料的防火性能、力学性能、抗紫外线(UV)、电磁干扰(EMI)屏蔽性能和阻燃性能等多学科性能。PP-Fe良好的分散性和界面相容性使其具有优异的PLA纳米复合材料性能。在PLA上加载20.0 wt%的PP-Fe纳米片导致最大放热率(72.7%)、总放热率(41.6%)和总产烟率(64.7%)显著降低。更重要的是，PLA/20PP-Fe复合材料的紫外线防护系数(UPF)值为120%，被归类为优异的紫外线屏蔽。一般来说，传统的阻燃方法 会显著降低机械性能。与纯PLA相比，PLA/20PP-Fe表现出增强的力学性能。研究了聚乳酸纳米复合材料复合性能提高的机理。
Freeform additive manufacturing of carbon fiber reinforced composites using dielectric barrier discharge-assisted Joule heating
Smita Shivraj Dasari, Aniela J. K. Wright, Jacob M. Carroll, Anubhav Sarmah, Daniel G. Carey, Nirup Nagabandi, Thang Q. Tran, Micah J. Green
doi:10.1016/j.compositesa.2024.108047
利用介电阻挡放电辅助焦耳加热的碳纤维增强复合材料的自由形态增材制造
We developed an out-of-oven additive manufacturing (AM) technique to rapidly print and cure thermosetting carbon fiber reinforced composites (CFRCs) using dielectric barrier discharge (DBD). Conventionally, CFRCs are produced by automated fiber placement machines (AFPs) that use molds and oven treatments to cure CFRCs in the desired shape. AM allows for on-the-fly printing and curing of CFRCs without the use of molds. AM techniques are limited to UV-curable, low viscosity, or rapid-curing resins. Here, we use DBD for in-situ heating and curing of continuous CFRCs using commercial thermosetting resins. As the partially cured composite is deposited, Joule-heating is induced via the DBD applicator, allowing the part to cure in the desired shape. DBD-manufactured composites show properties similar to conventionally manufactured (oven) composites. The method is capable of 2D and 3D multilayered structures, deposited automatically. This technology leverages AM techniques to enable printing of high-performance and lightweight materials in any desired shape.
我们开发了一种使用介质阻挡放电(DBD)快速打印和固化热固性碳纤维增强复合材料(CFRCs)的烤箱外增材制造(AM)技术。传统上，CFRCs是由自动纤维放置机(AFPs)生产的，该机器使用模具和烤箱处理将CFRCs固化成所需的形状。AM允许在不使用模具的情况下对CFRCs进行动态打印和固化。增材制造技术仅限于紫外光固化、低粘度或快速固化的树脂。在这里，我们使用DBD对使用商业热固性树脂的连续CFRCs进行原位加热和固化。当部分固化的复合材料沉积时，通过DBD涂抹器诱导焦耳加热，使部件固化成所需的形状。dbd制造的复合材料显示出与传统制造(烤箱)复合材料相似的性能。该方法可实现二维和三维多层结构的自动沉积。这项技术利用增材制造技术，可以打印任何所需形状的高性能轻质材料。
Enhancing Thermal Mechanical Properties of Polymer Composites with Hollow Porous Fillers
Haokun Yi, Shuxing Mei, Heming Shen, Rong Zhang, Zhuo Li
doi:10.1016/j.compositesa.2024.108048
用中空多孔填料增强聚合物复合材料的热力学性能
Incorporating inorganic fillers is a common strategy for reducing the coefficient of thermal expansion (CTE) in polymers, but it is often associated with limited efficiency and a sacrifice in mechanical compliance. Current approaches mainly involve surface modification of fillers to overcome these challenges, but a significant proportion of fillers remain underutilized. In this study, we introduced hollow porous SiO2 particles as fillers, utilizing both their external and internal surfaces to interact with the matrix. Moreover, the hollow porous structure allows the matrix to penetrate into the filler cavities, creating a unique mechanical interlock with the matrix. These combined effects result in a higher efficiency for CTE reduction and a significant improvement in the glass transition temperature. Furthermore, the hollow structure reduces the modulus of the fillers, resulting in a lower composite modulus compared to solid SiO2 counterparts. This approach offers a new avenue for enhancing the thermal mechanical properties of polymer composites.
加入无机填料是降低聚合物热膨胀系数(CTE)的常用策略，但它通常伴随着有限的效率和机械顺应性的牺牲。目前的方法主要涉及填料的表面改性来克服这些挑战，但很大比例的填料仍未得到充分利用。在这项研究中，我们引入了空心多孔SiO2颗粒作为填料，利用它们的内外表面与基体相互作用。此外，中空多孔结构允许基体渗透到填料腔中，与基体形成独特的机械联锁。这些综合效应导致了更高的CTE还原效率和玻璃化转变温度的显著改善。此外，空心结构降低了填料的模量，导致与固体SiO2相比，复合模量更低。该方法为提高聚合物复合材料的热力学性能提供了一条新的途径。
Composites Part B: Engineering
In-situ TiCxNy nanoparticle reinforced crack-free CoCrFeNi medium-entropy alloy matrix nanocomposites with high strength and ductility via laser powder bed fusion
Yali Zhang, Yongjian Fang, Min-Kyeom Kim, Ziyang Duan, Quan Yuan, Eunyoung Oh, Jonghwan Suhr
doi:10.1016/j.compositesb.2024.111237
原位TiCxNy纳米颗粒增强CoCrFeNi中熵合金基高强延性纳米复合材料
Although equiatomic CoCrFeNi medium-entropy alloys (MEAs) show excellent ductility, their strength is not high enough for the use in various engineering applications. It is necessary for their strength to be improved, while maintaining their great ductility. In this study, the in-situ TiCxNy nanoparticle reinforced equiatomic CoCrFeNi MEA matrix nanocomposites were fabricated by laser powder bed fusion (LPBF) technique and the addition of sub-micron TiC particles. Interestingly, the LPBF-fabricated CoCrFeNi MEAs have been found to exhibit both poor ultimate tensile strength (UTS) (∼582 MPa) and uniform elongation (δu) (∼11.7 %), attributed to the formation of hot cracks. However, the in-situ formation of TiCxNy nanoparticles could eliminate the formation of hot cracks. The near defect-free nanocomposites with substantial sub-grains were fabricated, and their UTS and δu were increased by 74.4 % (∼1015 MPa) and 92.3 % (∼22.5 %), respectively. The microstructure of as-built nanocomposites was mainly composed of FCC phase and TiCxNy nanoparticles, and a few M23C6 nanoparticles were found. The high strength of as-built nanocomposites was mainly attributed to Orowan and dislocation strengthening mechanisms. To the best of our knowledge, this is the first study to introduce high strength and great ductility into CoCrFeNi MEAs via the in-situ formation of TiCxNy nanoparticles with the optimized LPBF process.
虽然等原子CoCrFeNi中熵合金(MEAs)具有良好的延展性，但其强度不足以用于各种工程应用。有必要提高其强度，同时保持其良好的延展性。本研究采用激光粉末床熔融(LPBF)技术和添加亚微米TiC颗粒制备了原位TiCxNy纳米颗粒增强等原子CoCrFeNi MEA基纳米复合材料。有趣的是，由于热裂纹的形成，lpbf制造的CoCrFeNi MEAs表现出较差的极限抗拉强度(UTS)(~ 582 MPa)和均匀伸长率(δu)(~ 11.7 %)。而原位制备tixny纳米颗粒可以消除热裂纹的形成。制备了具有大量亚晶粒的近无缺陷纳米复合材料，其UTS和δu分别提高了74.4 %(~ 1015 MPa)和92.3 %(~ 22.5 %)。构建的纳米复合材料微观结构主要由FCC相和TiCxNy纳米颗粒组成，少量含有M23C6纳米颗粒。纳米复合材料的高强度主要归因于Orowan和位错强化机制。据我们所知，这是第一个通过优化的LPBF工艺原位形成TiCxNy纳米颗粒，将高强度和高延展性引入CoCrFeNi MEAs的研究。
Composites Science and Technology
Multifunctionality of MWCNT modified carbon fiber reinforced thermoplastic composite, and reclaiming composite in the pursuit of sustainable energy storage applications: An experimental and numerical analysis
R. Sasikumar, B. Raghavendra Babu, V. Subramanian, R. Jayavel
doi:10.1016/j.compscitech.2024.110468
MWCNT改性碳纤维增强热塑性复合材料的多功能性，以及复合材料在可持续储能应用中的回收:实验和数值分析
The functionalized multi-walled carbon nanotubes (MWCNTs) carbon fiber reinforced polycarbonate with multifaceted intrinsic features have been fabricated to explore its structural and sustainable reliability in diverse industrial applications. A technologically simple air spray deposition method was used to modify the carbon fiber with various concentrations (0.1, 0.3, 0.5, and 0.7 wt.%) of amine-MWCNTs. The fiber/film stacked composites were fabricated using the hot stamping technique. The interlaminar shear strength of the 0.7 % MWCNT reinforced composite is 50.77 MPa, which is 65.90 % higher than the neat composite. The interlaminar properties predicted through the integrated micromechanical modeling (Digimat-FE) and Abaqus FEA agree well with the experimental results. The 0.1 % CNT reinforcement possesses higher storage (2593 MPa) and loss (457.5 MPa) modulus compared to the neat sample. The continuous conducting network structure enables the maximum shielding effectiveness (SE) of 45.77 dB with 99.995 % efficiency for 0.7 % MWCNT-CF reinforced sample. The electrochemical performance of a symmetric pouch-type supercapacitor device developed from reclaimed carbon fiber (RCF) was investigated. The device has an areal energy density of 102 μWh/cm2 and an areal power density of 2.96 mW/cm2 at 1.5 mA/cm2.
制备了具有多面特性的功能化多壁碳纳米管(MWCNTs)碳纤维增强聚碳酸酯，探讨了其结构和在多种工业应用中的可持续可靠性。采用技术简单的空气喷雾沉积方法，用不同浓度(0.1、0.3、0.5和0.7 wt.%)的胺- mwcnts对碳纤维进行改性。采用热冲压技术制备了纤维/薄膜叠层复合材料。0.7 % MWCNT增强复合材料的层间抗剪强度为50.77 MPa，比纯复合材料提高65.90 %。通过综合微力学建模(Digimat-FE)和Abaqus有限元分析预测的层间特性与实验结果吻合较好。与纯样品相比，0.1 %碳纳米管增强具有更高的存储模量(2593 MPa)和损耗模量(457.5 MPa)。连续导电网络结构使MWCNT-CF增强样品的最大屏蔽效率(SE)达到45.77 dB，效率为99.995 %，为0.7 %。研究了用再生碳纤维(RCF)制成的对称袋型超级电容器的电化学性能。该器件的面能密度为102 μWh/cm2，在1.5 mA/cm2时的面功率密度为2.96 mW/cm2。
