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【新文速递】2024年3月27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 Science and Technology 1 篇

Composite Structures

Stiffness-driven design and optimization of a 3D-printed composite prosthetic foot: A beam finite Element-Based framework

Abdel Rahman N. Althahabi, Luca M. Martulli, Andrea Sorrentino, Marino Lavorgna, Emanuele Gruppioni, Andrea Bernasconi

doi:10.1016/j.compstruct.2024.118053

三维打印复合材料义足的刚度驱动设计与优化:基于梁有限元的框架

Composite foot prostheses are traditionally produced via lamination, a process that grants high structural efficiency. However, it is an expensive and time-consuming process. Production rate and customizability are thus limited. Additive manufacturing of composites can be a potential solution to these limitations. This work presents a tool to design and optimize Continuous Fiber-Reinforced Additively Manufactured (CFRAM) prosthetic feet using beam Finite Element (FE) modeling. This optimization tool was developed for weight minimization and obtaining a CFRAM prosthesis design matching up to three static stiffness parameters. The design variables were defined through parametrizing the geometry of the prosthesis designed and using the composite structure parameters. Thanks to the versatility of the tool, solutions to multiple optimization and design cases were used to assess different design concepts, such as the shape of the prosthesis (C-shape or J-shape). Also, the tool successfully duplicated the stiffness characteristics of an assumed laminated prosthesis. Finally, the sources of inaccuracy associated with the beam FE modeling approach were identified through a comparison with plane stress FE analysis.

复合材料脚假肢传统上是通过层压工艺生产的,这种工艺具有很高的结构效率。然而,这种工艺既昂贵又耗时。因此,生产率和可定制性受到限制。复合材料的增材制造是解决这些限制的潜在方法。这项工作介绍了一种利用梁有限元(FE)建模设计和优化连续纤维增强增材制造(CFRAM)义足的工具。开发该优化工具的目的是使重量最小化,并获得与三个静态刚度参数相匹配的 CFRAM 假肢设计。设计变量是通过设计假肢的几何参数和复合结构参数来定义的。得益于该工具的多功能性,多个优化和设计案例的解决方案被用于评估不同的设计理念,如假体形状(C 形或 J 形)。此外,该工具还成功复 制了假定层叠假体的刚度特征。最后,通过与平面应力 FE 分析的比较,确定了与梁 FE 建模方法相关的不准确性来源。


Composites Part A: Applied Science and Manufacturing

In-situ solid-state deformation-driven rapid reaction towards higher strength-ductility Al-CuO composites

Dongxin Mao, Xiaotian Ma, Yuming Xie, Xiangchen Meng, Naijie Wang, Zeyu Zhang, Xiuwen Sun, Yongxian Huang

doi:10.1016/j.compositesa.2024.108174

 

原位固态变形驱动快速反应,实现更高强度和电导率的 Al-CuO 复合材料

The strength-ductility dilemma of metallic matrix composites is mainly attributed to the mismatched phase/matrix interfaces, which induce stress concentration as dislocation piles up. Here, coherent nano-Al2O3 phases were in-situ formed in Al-CuO composites via rapid diffusion of neoteric deformation-driven metallurgy. The complex dislocation configuration was also promoted to induce the formation of about 14.5 % incoherent twin boundaries. The mean free path for dislocation movements was expanded, as dislocations could cut through the coherent nano-Al2O3 phases and interact with the incoherent twin boundaries without piled-up dislocations. The yield strength and elongation of the strength-ductility synergy Al-5CuO composites were 201 ± 14 MPa and 16.1 ± 0.5 %, indicating that in-situ Al2O3-Al coherent interface and incoherent twin boundaries exert remarkable ability of dislocation transmission.

金属基复合材料的强度-电导率困境主要归因于不匹配的相/基界面,这种界面会随着位错的堆积而导致应力集中。在这里,通过新形变驱动冶金的快速扩散,在 Al-CuO 复合材料中就地形成了相干的纳米 Al2O3 相。复杂的位错配置也促进了约14.5%的非相干孪晶边界的形成。位错运动的平均自由路径扩大了,因为位错可以穿过相干的纳米 Al2O3 相,并与不相干的孪生边界相互作用,而不会堆积位错。强度-电导率协同效应 Al-5CuO 复合材料的屈服强度和伸长率分别为 201 ± 14 MPa 和 16.1 ± 0.5 %,表明原位 Al2O3-Al 相干界面和非相干孪晶边界具有显著的位错传输能力。


Composites Science and Technology

In-situ exfoliation of hexagonal boron nitride during the forced flow of highly elastic polylactide to fabricate electrospun fibrous film with high thermal conductivity and low dielectric loss

Ruixue Wu, Xudong Song, Yuan Ji, Hong Wu, Shaoyun Guo, Jianhui Qiu

doi:10.1016/j.compscitech.2024.110573

 

在高弹性聚乳酸的强制流动过程中原位剥离六方氮化硼,以制造具有高热导率和低介电损耗的电纺纤维膜

Boron nitride nanosheets (BNNS) have promising applications in thermal management materials, due to their high thermal conductivity and low dielectric loss. However, it is still challenging to fabricate BNNS with large lateral size and structural integrity via solvent-free methods. Here, we report a novel processing method for in-situ exfoliation of hexagonal boron nitride (h-BN) to fabricate BNNS with an average lateral size of 1.45 μm, average thickness of 4.88 nm and few lattice defects during the forced flow of polylactide (PLA) in a highly elastic state. We further fabricate flexible and bio-degradable PLA/BNNS electrospun fibrous film for electronic devices to replace petroleum-based composites. The PLA/BNNS fibrous film exhibits an in-plane thermal conductivity of 4.9 W/(m·K) at the BNNS loading of 20 wt%. Moreover, the fibrous film also has a low dielectric loss (0.007 at 1 kHz) and good electrical insulation. The in-situ exfoliation strategy is simple, economical and environmentally friendly, providing an effective route to design thermal management materials with high thermal conductivity and low dielectric loss in the future of electronic devices.

氮化硼纳米片(BNNS)具有高热导率和低介电损耗的特点,因此在热管理材料领域有着广阔的应用前景。然而,通过无溶剂方法制造具有大横向尺寸和结构完整性的 BNNS 仍然具有挑战性。在此,我们报告了一种原位剥离六方氮化硼(h-BN)的新型加工方法,在高弹性聚乳酸(PLA)的强制流动过程中,制备出平均横向尺寸为 1.45 μm、平均厚度为 4.88 nm 且晶格缺陷极少的 BNNS。我们进一步制备了柔韧且可生物降解的聚乳酸/BNNS电纺纤维膜,用于电子设备以取代石油基复合材料。当 BNNS 含量为 20 wt% 时,聚乳酸/BNNS 纤维薄膜的面内导热系数为 4.9 W/(m-K)。此外,该纤维膜还具有较低的介电损耗(1 kHz 时为 0.007)和良好的电绝缘性。这种原位剥离策略简单、经济、环保,为未来电子设备设计具有高热导率和低介电损耗的热管理材料提供了一条有效途径。




来源:复合材料力学仿真Composites FEM
ACTAdditiveDeform复合材料冶金电子增材UGUM材料
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首次发布时间:2024-11-13
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【新文速递】2024年3月9日复合材料SCI期刊最新文章

今日更新:Composites Part A: Applied Science and Manufacturing 2 篇,Composites Part B: Engineering 3 篇,Composites Science and Technology 1 篇Composites Part A: Applied Science and ManufacturingA low-density polymer/CrMnFeCoNi composite with high strength and high damping capacityZhaohan Jiang, Gongli Tan, Xiangyi Huang, Teng Li, Hanyu Cai, Xiaojun Li, Qiru Wang, Xinxin Lv, Shen Gongdoi:10.1016/j.compositesa.2024.108130具有高强度和高阻尼能力的低密度聚合物/铬锰铁钴镍复合材料A novel damping composite was successfully prepared by taking a porous CrMnFeCoNi high-entropy shape memory alloy as the skeleton and filling its pores with the composite composed of carbon nanotubes and polyurethane/epoxy interpenetrating polymer networks. When the porosity, pore size and CNT loading are 80 %, 1.2 mm and 2 wt%, respectively, the compressive strength, elastic modulus and energy absorption capacity of the composite are 35.7 MPa, 1.31 GPa and 23.1 MJ/m3 (ε = 65 %), respectively. Furthermore, it has a mere density of 2.525 g/cm3. Its loss factor is greater than 0.093 and can reach a maximum of 0.145 within the temperature and frequency range of 20 ∼ 150 ℃ and 0.1 ∼ 200 Hz. A triple-phase micromechanical model was utilized to explore the damping mechanism of composites. Results indicate the coupling of multiple damping mechanisms is the reason for the high ground-state damping of composites, and interface damping is the primary damping mechanism. The superposition of the ε → γ reverse martensite transformation peak of the CrMnFeCoNi HESMA skeleton and the glass transition peak of the CNTs/polymer composite matrix realizes the wide damping temperature range of the composite.以多孔铬锰铁钴镍高熵形状记忆合金为骨架,在其孔隙中填充碳纳米管和聚氨酯/环氧互穿聚合物网络组成的复合材料,成功制备了一种新型阻尼复合材料。当孔隙率、孔径和碳纳米管含量分别为 80%、1.2 mm 和 2 wt% 时,复合材料的抗压强度、弹性模量和能量吸收能力分别为 35.7 MPa、1.31 GPa 和 23.1 MJ/m3 (ε = 65 %)。此外,它的密度仅为 2.525 g/cm3。在 20 ∼ 150 ℃ 和 0.1 ∼ 200 Hz 的温度和频率范围内,其损耗因子大于 0.093,最大可达 0.145。利用三相微机械模型探索了复合材料的阻尼机制。结果表明,多种阻尼机制的耦合是复合材料高基态阻尼的原因,而界面阻尼是主要的阻尼机制。CrMnFeCoNi HESMA 骨架的ε → γ反向马氏体转变峰与 CNTs/聚合物复合基体的玻璃化转变峰的叠加实现了复合材料较宽的阻尼温度范围。Self-healing thermally conductive polymer composites based on polyvinyl alcohol with dynamic borate ester and hydrogen bondsXing Xie, Dan Yangdoi:10.1016/j.compositesa.2024.108131 基于具有动态硼酸酯和氢键的聚乙烯醇的自愈合导热聚合物复合材料Traditional thermally conductive polymer materials exhibit a propensity for damage when applied in dynamic environments, which leads to shortened service life and suboptimal utilization of resources. Herein, polyvinyl alcohol (PVA)-based thermally conductive composites with a self-healing capability are prepared based on dynamic borate ester bonds and hydrogen bonds. Poly(dopamine) functionalized graphene oxide (denoted as PGO) is used as a thermally conductive filler to achieve a high thermal conductivity (TC) of 0.79 W/(m·K) for the PGO/PVA composites, which is 527 % of pure PVA (0.15 W/(m·K)). The improved TC of PGO/PVA composites is mainly attributed to the reduction in interface thermal resistance and the construction of heat conduction channels. Additionally, the PGO/PVA composites display a self-healing efficiency higher than 60 % at room temperature without external simulation. Furthermore, the as-prepared PGO/PVA composites exhibit excellent mechanical properties, with a tensile strength of 409 kPa and an elongation at break of 479 %, respectively. This work provides a promising strategy for fabricating thermally conductive polymer composites, which can be deployed as thermal interface materials for long-term applications.传统的导热聚合物材料在动态环境中使用时容易发生损坏,从而导致使用寿命缩短和资源利用率降低。本文基于动态硼酸酯键和氢键,制备了具有自修复能力的聚乙烯醇(PVA)基导热复合材料。使用聚(多巴胺)功能化氧化石墨烯(简称 PGO)作为导热填料,PGO/PVA 复合材料的导热系数(TC)高达 0.79 W/(m-K),是纯 PVA(0.15 W/(m-K))的 527%。PGO/PVA 复合材料 TC 值的提高主要归功于界面热阻的降低和热传导通道的构建。此外,PGO/PVA 复合材料在室温下的自愈效率高于 60%,无需外部模拟。此外,制备的 PGO/PVA 复合材料还具有优异的机械性能,拉伸强度和断裂伸长率分别达到 409 kPa 和 479 %。这项工作为制造导热聚合物复合材料提供了一种前景广阔的策略,这种复合材料可作为热界面材料长期应用。Composites Part B: EngineeringSynthesis mechanism of pelleted heterostructure Ti64–TiB composites via an interdiffusion and self-organization strategy based on powder metallurgyLei Liu, Shufeng Li, Xin Zhang, Shaolong Li, Shaodi Wang, Bo Li, Lina Gao, Huiying Liu, Dongxu Hui, Deng Pan, Shota Kariya, Junko Umeda, Katsuyoshi Kondohdoi:10.1016/j.compositesb.2024.111366通过基于粉末冶金的相互扩散和自组织策略合成颗粒状异质结构 Ti64-TiB 复合材料的机理Titanium matrix composites (TMCs) are the most attractive next-generation structural materials for lightweight design due to their high specific modulus and specific strength. Designing heterogeneous grain structures has been a widespread strategy for overcoming the strength-ductility trade-off in powder metallurgical TMCs. However, achieving a customizable heterogeneous grain structure in TMCs remains a formidable challenge. Here, we propose a novel interdiffusion and self-organization strategy based on the powder metallurgy method to fabricate a pelleted heterostructure Ti6Al4V(Ti64)–TiB composites, which integrates a heterogeneous distribution of reinforcements and heterogeneous grain structures of the matrix. The study reveals that the formation of the pelleted heterostructures is primarily governed by the interdiffusion reaction process between Ti and Al, and V elements, coupled with the growth and distribution changes of TiB induced by the interdiffusion reaction. Moreover, the pellet size is tailored by the spherical Ti–TiB composite powder, allowing precise control over the heterogeneous grain regions. This research contributes valuable insights into the manufacturing process of pelleted heterostructure Ti64–TiB composites and provides a conceptual framework applicable to the design of similar structures in various metal matrix composite systems.钛基复合材料(TMC)具有很高的比模量和比强度,是最有吸引力的新一代轻质结构材料。在粉末冶金钛基复合材料中,设计异质晶粒结构一直是克服强度-电导率权衡的普遍策略。然而,在 TMC 中实现可定制的异质晶粒结构仍然是一项艰巨的挑战。在此,我们提出了一种基于粉末冶金方法的新型相互扩散和自组织策略,用于制造球团异质结构 Ti6Al4V(Ti64)-TiB 复合材料,该复合材料整合了增强体的异质分布和基体的异质晶粒结构。研究表明,球团异质结构的形成主要受制于 Ti 与 Al 和 V 元素之间的相互扩散反应过程,以及由相互扩散反应引起的 TiB 的生长和分布变化。此外,球形 Ti-TiB 复合粉末可定制颗粒尺寸,从而实现对异质晶粒区域的精确控制。这项研究为粒状异质结构 Ti64-TiB 复合材料的制造工艺提供了宝贵的见解,并为各种金属基复合材料体系中类似结构的设计提供了概念框架。Exploring the development and applications of sustainable natural fiber composites: A review from a nanoscale perspectiveYuqi Feng, Huali Hao, Haibao Lu, Cheuk Lun Chow, Denvid Laudoi:10.1016/j.compositesb.2024.111369 探索可持续天然纤维复合材料的开发和应用:纳米视角综述As a result of global sustainable development, natural fiber composites (NFCs) have become increasingly attractive due to their remarkable performance, novel functionality, and eco-friendliness. Natural fibers are biodegradable, affordable, and low-density, which makes them potential materials for use in developing alternatives to traditional petroleum-based synthetic fiber composites. However, challenges such as inadequate compatibility between natural fibers and matrix limit the further development of NFCs. Studies have shown that molecular dynamics (MD) simulations can offer valuable insights into the fundamental properties and deformation mechanisms governing the macroscopic performances of NFCs, including mechanical properties, thermal stability, and interfacial interactions. Based on the underlying understanding of the nanostructure of natural fibers, these fibers can be modified at nanoscale to improve the performance of NFCs. This paper first reviews the hierarchical structures of natural fibers, mainly wood and bamboo fibers, highlighting their relationship with mechanical and thermal properties. Treatments to improve natural fiber-matrix compatibilities are then presented. The fundamental factors behind the functionalized properties of modified NFCs are emphasized from the nanoscale. Additionally, applications of NFCs as structural and functional materials in the construction, automotive, and aerospace industries are reviewed. Finally, this paper identifies the growing use of machine learning-assisted MD simulation techniques to facilitate the design of NFCs. Literature and data sources for this study were obtained through a combination of online academic databases, citation chaining, government databases, and industry reports.在全球可持续发展的大背景下,天然纤维复合材料(NFC)因其卓越的性能、新颖的功能和生态友好性而变得越来越有吸引力。天然纤维可生物降解、价格低廉、密度低,是开发传统石油基合成纤维复合材料替代品的潜在材料。然而,天然纤维与基体之间的兼容性不足等挑战限制了 NFC 的进一步发展。研究表明,分子动力学(MD)模拟可以为了解支配 NFC 宏观性能的基本特性和变形机制(包括机械性能、热稳定性和界面相互作用)提供有价值的见解。基于对天然纤维纳米结构的基本了解,可以在纳米尺度上对这些纤维进行改性,从而提高 NFC 的性能。本文首先回顾了天然纤维(主要是木纤维和竹纤维)的分层结构,重点介绍了它们与机械性能和热性能的关系。然后介绍了改善天然纤维与基质相容性的处理方法。从纳米尺度强调了改性 NFC 功能化特性背后的基本因素。此外,还回顾了 NFC 作为结构和功能材料在建筑、汽车和航空航天工业中的应用。最后,本文指出了机器学习辅助 MD 仿真技术在促进 NFC 设计方面日益广泛的应用。本研究的文献和数据来源综合了在线学术数据库、引文链、政府数据库和行业报告。Assessing the stress-transfer capability of mineral impregnated PBO yarns in a limestone calcined clay cement-based (LC3) matrixCesare Signorini, Andrea Nobili, Marco Liebscher, Jitong Zhao, Ameer H. Ahmed, Thomas Köberle, Viktor Mechtcherinedoi:10.1016/j.compositesb.2024.111364评估石灰石煅烧粘土水泥基(LC3)中矿物浸渍 PBO 纱线的应力传递能力Technical textiles made of poly(p-phenylene-2,6-benzobisoxazole) (PBO) represent attractive candidates for strengthening and repairing damaged concrete and masonry structures, due to the outstanding durability and mechanical performance of PBO fibres. Similar to their aramid counterpart, PBO fibres have proven to be very effective against dynamic and impact loading. In this contribution, the pull-out behaviour of PBO multifilament yarns embedded into a blended cement-based matrix is investigated, with particular reference to its stress-transfer capacity. In addition to the as-received PBO yarns, impregnation with a cement-based suspension, which can fully preserve the inorganic nature of the composite system, is also evaluated. Experimental results are presented and interpreted using a one-dimensional mechanical model. The findings indicate that mineral impregnation of the yarns provides a 40% increase in the stress-transfer capacity with the matrix, corresponding to a halving of the anchoring length. These performance gains are also supported by a transition in the failure mechanism which shifts from friction-based pull-out to fibre rupture.聚(对苯二甲酰-2,6-苯并异噁唑)(PBO)纤维具有出色的耐久性和机械性能,因此在加固和修复受损的混凝土和砖石结构方面,PBO 技术纺织品是极具吸引力的候选材料。与芳纶纤维类似,PBO 纤维已被证明对动态和冲击载荷非常有效。本文研究了嵌入混合水泥基质中的 PBO 多纤丝的拉出行为,特别是其应力传递能力。除了原始 PBO 纱线外,还评估了水泥基悬浮液的浸渍情况,该悬浮液可完全保持复合材料系统的无机性质。实验结果通过一维机械模型进行了展示和解释。研究结果表明,对纱线进行矿物浸渍后,纱线与基体之间的应力传递能力提高了 40%,相当于锚固长度缩短了一半。这些性能的提高还得益于失效机制的转变,即从摩擦拉断转变为纤维断裂。Composites Science and TechnologyA controllable foaming approach for the fabrication of “rattan-like” graphene-based composite aerogel with desirable microwave absorption capacityXiaoxiao Zhang, Qitan Zheng, Yujie Chen, Qunfu Fan, Hua Li, Hezhou Liu, Zhixin Chen, Yao Li, Hui Pan, Xueliang Jiang, Shenmin Zhudoi:10.1016/j.compscitech.2024.110532 可控发泡法制造具有理想微波吸收能力的 "藤状 "石墨烯基复合气凝胶As a common environmental pollutant, microwave can cause great harms to human health. The development of high-performance microwave absorber with lightweight is indeed necessary. Herein, “rattan-like” graphene-based composite aerogels, having macroscopic pores surrounded by plenty of small pores, were designed and fabricated via an in-situ foaming then carbonized approach. Firstly, graphene oxide (GO), nanocellulose and ferrous ions were integrated into an aerogel with uniform large pores via a freeze-casting method. Then, the aerogel was immersed into a H2O2 solution, during which bubble clusters generated in situ. These bubbles were driven into the stacked GO sheets and formed small pores. With the increase of the H2O2 concentration from 0.5 to 10 wt%, the count percentage of the small pores in the aerogel increased from 81.5 to 95.2%. After the final carbonization, the graphene sheets were dually interconnected with magnetic nanoparticles and carbonized nanocellulose. The unique porous structure and dual-connected networks endowed the aerogel with enhanced conductive loss and optimized impedance matching capacity, and thus an excellent microwave absorption performance, whose maximum reflection loss achieves −68.5 dB. Further, the aerogel also exhibited superior sound absorption performance (noise reduction coefficient up to 0.91 in 1000–6300 Hz), and good mechanical stability.微波作为一种常见的环境污染物,会对人体健康造成极大危害。因此,开发高性能、轻质的微波吸收剂十分必要。本文设计并通过原位发泡然后碳化的方法制造了 "藤条状 "石墨烯基复合气凝胶,其宏观孔隙被大量小孔包围。首先,通过冷冻铸造法将氧化石墨烯(GO)、纳米纤维素和亚铁离子集成到具有均匀大孔的气凝胶中。然后,将气凝胶浸入 H2O2 溶液中,在此过程中会在原位产生气泡团。这些气泡被驱赶到堆叠的 GO 片材中,形成了小孔。随着 H2O2 浓度从 0.5 wt% 增加到 10 wt%,气凝胶中小孔的计数百分比从 81.5% 增加到 95.2%。最终碳化后,石墨烯薄片与磁性纳米颗粒和碳化纳米纤维素实现了双重互连。独特的多孔结构和双连接网络使气凝胶具有更强的传导损耗和更佳的阻抗匹配能力,因而具有优异的微波吸收性能,其最大反射损耗达到-68.5 dB。此外,气凝胶还具有优异的吸音性能(1000-6300 Hz 的降噪系数高达 0.91)和良好的机械稳定性。来源:复合材料力学仿真Composites FEM

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