【新文速递】2023年10月18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 4 篇，Composites Science and Technology 1 篇

Composite Structures

Mechanical Performance of 3D Woven Glass Fiber I-beam Composites with In-situ Polyurethane Foaming

Kucukkalfa E, Isikci G, Yildiz K, Cebeci H

doi:10.1016/j.compstruct.2023.117636

原位聚氨酯发泡三维玻璃纤维编织工字钢复合材料的力学性能

3D weaving of I-beam structures can potentially create delamination- and joint-free structures, expanding their use in engineering applications compared to metal or traditional laminated composite beams. In addition, polymeric foams can be utilized to fill the vacancies between the web and the flanges of I beams, improving the mechanical characteristics and the structural integrity with little to no weight penalty. Moreover, interposing an adhesive layer between the I beam and the foam structure can result in a more effective bonding which intensifies the structure's robustness. In this study, high-performance I-beam composites were produced by combining polymeric foams with 3D woven glass fiber composites. Low- and high-density polyurethane foams were successfully inserted between the web and the flanges of 3D woven glass fiber composites manufactured by the vacuum infusion process using the free-rise foaming method. Samples with adhesive films were also produced to assess and compare their effectiveness with the composites made solely of polyurethane foam and I beam. The increases in energy absorption capacity and compressive and flexural properties were analyzed under compressive and flexural (three-point bending) loading. The obtained results indicate that structural integrity under bending can be substantially improved with the in-situ foaming supported by adhesive layers.

与金属或传统的层压复合梁相比，工字梁结构的三维编织有可能创造出无分层和无接缝的结构，从而扩大其在工程应用中的使用范围。此外，还可以利用聚合泡沫来填补工字梁腹板和翼板之间的空隙，从而在几乎不增加重量的情况下改善机械特性和结构完整性。此外，在工字梁和泡沫结构之间添加粘合剂层可以实现更有效的粘合，从而增强结构的坚固性。在这项研究中，通过将聚合物泡沫与三维玻璃纤维编织复合材料相结合，生产出了高性能工字梁复合材料。低密度和高密度聚氨酯泡沫被成功地插入了三维玻璃纤维编织复合材料的腹板和法兰之间。此外，还制作了带有粘合薄膜的样品，以评估和比较其与仅由聚氨酯泡沫和工字梁制成的复合材料的效果。在抗压和抗弯（三点弯曲）加载条件下，分析了能量吸收能力、抗压和抗弯特性的提高情况。结果表明，在粘合剂层的支持下，原位发泡可显著改善弯曲下的结构完整性。

Composites Part A: Applied Science and Manufacturing

Mechanical characteristics of reclaimed carbon fibre under superheated steam atmosphere and its feasibility for remanufacturing CFRP/CFRTP

Obunai K., Okubo K.

doi:10.1016/j.compositesa.2023.107843

过热蒸汽环境下再生碳纤维的机械特性及其再制造 CFRP/CFRTP 的可行性

This study is performed to investigate the effect of using superheated steam (SHS) in pyrolysis reclamation on the mechanical properties of reclaimed carbon fibres. The mechanical characteristics of the reclaimed fibres are evaluated by analyzing their tensile strength and fracture toughness. The feasibility of the reclaimed fibres is assessed by using them to remanufacture composites with epoxy and polypropylene matrices. The performance of the remanufactured composites is evaluated via mechanical testing. The test results show that using SHS in pyrolysis effectively prevents the degradation of the reclaimed carbon fibres. Variations in the tensile strength and fracture toughness of the reclaimed fibres are lower when pyrolysis is performed under a SHS atmosphere. Moreover, the mechanical characteristics of the remanufactured composites show that using SHS during pyrolysis reduces the degradation of the bending strength and Izod impact strength.

本研究旨在探讨在热解再生过程中使用过热蒸汽（SHS）对再生碳纤维机械性能的影响。通过分析再生纤维的拉伸强度和断裂韧性，对其机械特性进行了评估。通过使用再生纤维重新制造以环氧树脂和聚丙烯为基材的复合材料，评估了再生纤维的可行性。通过机械测试评估了再制造复合材料的性能。测试结果表明，在热解过程中使用 SHS 可以有效防止再生碳纤维的降解。在 SHS 气氛下进行热解时，再生纤维的拉伸强度和断裂韧性变化较小。此外，再生复合材料的机械特性表明，在热解过程中使用 SHS 可减少弯曲强度和伊佐德冲击强度的退化。

Composites Part B: Engineering

Molecular engineering of N-rich ZIF-integrated graphene composite interface for efficient physiochemical confinement and catalytic conversion of polysulfides in lithium–sulfur batteries

Chae Seongwook, Kim Sehun, Lee Taewoong, Kang Haisu, Kwon Young Je, Choi Gyeong Min, Heo Woo Sub, Park Jae Bin, Kim Ji-Oh, Kwon Taekyun, Kim Byeong Jin, Cho Chae-Ryong, Park Jun-Woo, Lee Seung Geol, Cho Kie Yong, Lee Jin Hong

doi:10.1016/j.compositesb.2023.111050

富含 N 的 ZIF 集成石墨烯复合界面的分子工程，用于锂硫电池中多硫化物的高效理化约束和催化转化

Lithium–sulfur (Li–S) batteries are regarded as one of the most promising energy storage systems because of their high theoretical specific capacity, energy density, low cost, and environmental benignancy. However, the practical application of Li–S batteries has been hindered by inevitable polysulfides shuttling behavior, the sluggish redox kinetics, and poor electrical conductivity of sulfur, which lead to rapid capacity decay and low active material utilization. In this study, we report a multifunctional layer consisting of N-rich zeolitic imidazolate frameworks (ZIF)/reduced graphene oxide (rGO) composite (NZG) as an electrocatalyst to overcome the drawbacks of Li–S batteries. During the preparation of NZG, deamination of the ZIF8A induces the incorporation of abundant N-containing moieties into rGO (pyridinic and pyrrolic N), which results in providing favorable active sites for polysulfides confinement and their rapid conversion via physiochemical interactions. Additionally, hierarchical pores with large surface area and interconnected conductive pathways in the as-prepared multifunctional layer accelerate the catalytic conversion kinetics of polysulfide species, leading to high sulfur utilization and enhanced Li–S battery electrochemical performance. This work suggests an efficient approach for designing multifunctional layers to achieve high-performance Li–S batteries.

锂硫（Li-S）电池因其理论比容量高、能量密度大、成本低和对环境无害而被视为最有前途的储能系统之一。然而，由于多硫化物不可避免的穿梭行为、缓慢的氧化还原动力学和硫的不良导电性，导致容量快速衰减和活性材料利用率低，锂-硫电池的实际应用一直受到阻碍。在本研究中，我们报告了一种富含 N 的沸石咪唑酸框架（ZIF）/还原氧化石墨烯（rGO）复合材料（NZG）组成的多功能层，作为电催化剂克服了锂-S 电池的缺点。在制备 NZG 的过程中，ZIF8A 的脱氨基作用诱导了大量含 N 的分子（吡啶 N 和吡咯 N）加入到 rGO 中，从而为多硫化物提供了有利的活性位点，并通过生化作用使其快速转化。此外，制备的多功能层中具有大表面积的分层孔隙和相互连接的导电通路可加速多硫化物的催化转化动力学，从而提高硫的利用率并增强锂-S 电池的电化学性能。这项工作为设计多功能层以实现高性能锂-S 电池提出了一种有效的方法。

Metal matrix composite with superior ductility at 800 °C: 3D printed In718+ZrB2 by laser powder bed fusion

Tekoğlu Emre, O'Brien Alexander D., Bae Jong-Soo, Lim Kwang-Hyeok, Liu Jian, Kavak Sina, Zhang Yong, Kim So Yeon, Ağaoğulları Duygu, Chen Wen, Hart A. John, Sim Gi-Dong, Li Ju

doi:10.1016/j.compositesb.2023.111052

金属基复合材料在 800 °C 时具有优异的延展性：通过激光粉末床熔融技术三维打印 In718+ZrB2

We investigated the microstructural and mechanical properties of ZrB2 fortified Inconel 718 (In718+ZrB2) superalloy metal matrix composite (MMC), which was produced via Laser Powder Bed Fusion (LPBF). 2 vol% ZrB2 nano powders (below 100 nm in diameter) were decorated on the surfaces of Inconel 718 alloy powders by high-speed blender. Microstructural analysis of the as-printed specimens showed that the ZrB2 decomposed during LPBF, which promoted the formation of homogeneously distributed (Zr, Ni)-based intermetallic and (Nb, Mo, Cr)-based boride nanoparticles in the matrix. The 3D printed In718+ZrB2 has remarkably lower porosity and smaller grain size compared to 3D printed In718 fabricated under the same LPBF conditions. The mechanical performance of the as-printed and heat-treated In718+ZrB2 showed significantly higher room temperature (RT) hardness, RT yield strength (σYS), and RT ultimate tensile strength (σUTS) compared to In718. High-temperature tensile tests at 800 °C showed that In718+ZrB2 has ∼10× tensile ductility with higher σYS (10 %) and σUTS (8 %) than pure In718.

我们研究了通过激光粉末床融合（LPBF）技术生产的 ZrB2 强化 Inconel 718（In718+ZrB2）超合金金属基复合材料（MMC）的微观结构和力学性能。通过高速搅拌机将 2 Vol% 的 ZrB2 纳米粉末（直径小于 100 nm）装饰在 Inconel 718 合金粉末的表面。打印试样的微观结构分析表明，ZrB2在LPBF过程中分解，促进了基体中均匀分布的（Zr、Ni）金属间化合物和（Nb、Mo、Cr）硼化物纳米颗粒的形成。与在相同 LPBF 条件下制造的三维打印 In718 相比，三维打印 In718+ZrB2 的孔隙率更低，晶粒尺寸更小。与 In718 相比，经过打印和热处理的 In718+ZrB2 的机械性能显示出更高的室温（RT）硬度、RT 屈服强度（σYS）和 RT 极限拉伸强度（σUTS）。800 °C 高温拉伸试验表明，与纯 In718 相比，In718+ZrB2 具有 ∼10 倍的拉伸延展性，σYS（10 %）和σUTS（8 %）也更高。

Elastic architected mechanical metamaterials with negative stiffness effect for high energy dissipation and low frequency vibration suppression

Chen Shuai, Liu Xin, Hu Jiqiang, Wang Bing, Li Menglei, Wang Lianchao, Zou Yajun, Wu Linzhi

doi:10.1016/j.compositesb.2023.111053

具有负刚度效应的弹性结构机械超材料，用于高能耗耗散和低频振动抑制

In this research, mechanical metamaterials with negative stiffness (NS) effect were architected and fabricated for high energy dissipation and low frequency vibration suppression. Periodic cellular metamaterials formed by connecting multiple NS elements in series exhibited hysteresis and lengthy sawtooth loading and unloading plateaus, which made them desirable for use in energy dissipation applications. And the key point was that the deformation of these metamaterials was completely reversible. To determine the underlying cause of hysteresis, the mechanical behavior with phase-transition characteristics was analyzed. Then, a finite element model was built, and the numerical simulation results were compared to the experimental test findings of the metamaterials, and the two were in good agreement, verifying the validity of the model. Furthermore, the influences of structural parameters on mechanical characteristics were systematically investigated and discussed utilizing the numerical models that had undergone experimental validation. The energy dissipation effect resulting from the phase transformation mechanisms could also be applied to the field of vibration control. Corresponding hammer tests were performed to explore the dynamic behavior of the NS metamaterials. The results show that the proposed metamaterials exhibit excellent vibration suppression performance, especially for low frequency vibration mitigation.

本研究设计并制造了具有负刚度（NS）效应的机械超材料，用于高能量耗散和低频振动抑制。通过将多个负刚度元件串联形成的周期性蜂窝超材料表现出滞后性和冗长的锯齿形加载和卸载高原，因此非常适合用于能量耗散应用。最关键的是，这些超材料的变形是完全可逆的。为了确定滞后的根本原因，我们分析了具有相变特性的机械行为。然后，建立了一个有限元模型，并将数值模拟结果与超材料的实验测试结果进行了比较，结果两者非常吻合，验证了模型的有效性。此外，利用经过实验验证的数值模型，系统地研究和讨论了结构参数对力学特性的影响。相变机制产生的能量耗散效应也可应用于振动控制领域。为探索 NS 超材料的动态行为，还进行了相应的锤击试验。结果表明，所提出的超材料具有出色的振动抑制性能，尤其是在低频振动缓解方面。

Fe-NC nanozymes-loaded TiO2 nanotube arrays endow titanium implants with excellent antioxidant capacity for inflammation inhibition and soft tissue integration

Zhu Hongqin, Zhang Haifeng, Chen Shuhan, Guan Shiwei, Lu Wei, Zhu Haihong, Ouyang Liping, Liu Xuanyong, Mei Yongfeng

doi:10.1016/j.compositesb.2023.111054

Fe-NC纳米酶负载的TiO2纳米管阵列赋予钛植入物卓越的抗氧化能力，可抑制炎症并与软组织融为一体

Titanium (Ti) and its alloys have been widely used as percutaneous and subcutaneous implants due to their excellent mechanical properties and biocompatibility. However, the aggregation of reactive oxygen species (ROS) and persistent inflammatory responses at the implant site severely affect the soft tissue integration of Ti implants, causing a series of biological complications. To address this issue, in this study, Fe-nitrogen-doped carbon single-atom nanozymes (Fe-NC nanozymes) loaded titanium oxide nanotube arrays (Fe-NC@TNT) were constructed by anodic oxidation and solvothermal method on medical titanium surfaces. The surface morphology, physical composition, enzyme-like catalytic activity, inflammatory response, and soft tissue compatibility of Fe-NC@TNT were investigated. The unique nanotube array fully exposes the catalytic active sites of Fe-NC nanozymes and significantly enhances their enzyme-like catalytic performance to eliminate superoxide anion, hydrogen peroxide, and more toxic hydroxyl radicals, which could effectively reduce the intracellular ROS levels of macrophages and fibroblasts, thereby inhibiting the inflammatory responses of macrophages and promoting the functional expression of fibroblasts. In vivo animal experiments have further demonstrated that Fe-NC@TNT can effectively regulate the immune response and promote the integration between the implant and the surrounding soft tissues.

钛（Ti）及其合金具有优异的机械性能和生物相容性，已被广泛用作经皮和皮下植入物。然而，活性氧（ROS）的聚集和植入部位持续的炎症反应严重影响了钛植入物的软组织整合，导致一系列生物并发症。针对这一问题，本研究采用阳极氧化和溶热法在医用钛表面构建了负载氧化钛纳米管阵列（Fe-NC@TNT）的铁氮掺杂碳单原子纳米酶（Fe-NC nanozymes）。研究了 Fe-NC@TNT 的表面形态、物理成分、酶样催化活性、炎症反应和软组织相容性。独特的纳米管阵列充分暴露了Fe-NC纳米酶的催化活性位点，显著增强了其酶促催化性能，可消除超氧阴离子、过氧化氢和毒性更强的羟自由基，有效降低巨噬细胞和成纤维细胞细胞内的ROS水平，从而抑制巨噬细胞的炎症反应，促进成纤维细胞的功能表达。体内动物实验进一步证明，Fe-NC@TNT 能有效调节免疫反应，促进植入物与周围软组织的融合。

Composites Science and Technology

High-temperature polymer dielectric films with excellent energy storage performance utilizing inorganic outerlayers

Liu Xue-Jie, Cheng Meng, Zhang Yiyi, Xing Yunqi, Dang Zhi-Min, Zha Jun-Wei

doi:10.1016/j.compscitech.2023.110305

利用无机外层实现具有优异储能性能的高温聚合物电介质薄膜

The optimization of high-temperature polymer capacitors is critical to the development of power electronics in harsh environments. The conduction loss of polymers increases dramatically at high temperatures, leading to a decrease in energy density and charge/discharge efficiency, which is a major impediment for capacitor applications. In this work, polyetherimide (PEI) composite films with trilayer structures are designed, in which the boron nitride nanosheet (BNNS) outer layers are optimized for charge blocking effect at multiple interfaces. The modulation of the inorganic layers not only increases the barrier height for charge injection from the electrodes, but also creates a PEI layer/BNNS layer interface that facilitates the formation of traps, thus effectively suppressing further carrier transport. Experiment and simulation verify that the construction of the trilayer structure promotes electric field redistribution, which significantly enhances high-temperature energy storage performance. At 200 °C, the energy density of the trilayer composite film is 3.81 J cm−3 with a charge/discharge efficiency >90 %, which is 766 % higher than PEI film (0.44 J cm−3 with a charge/discharge efficiency >90 %). Notably, the energy storage performance of trilayer composite film at high temperature is far superior to the reported high-temperature polymer dielectric films. This work demonstrates the promising potential of multilayer structures applied to dielectric polymer composite films at high temperatures.

高温聚合物电容器的优化对于在恶劣环境中开发电力电子产品至关重要。聚合物的传导损耗在高温下会急剧增加，从而导致能量密度和充放电效率下降，这是电容器应用的一大障碍。本研究设计了具有三层结构的聚醚酰亚胺（PEI）复合薄膜，其中优化了氮化硼纳米片（BNNS）外层，以在多个界面上实现电荷阻断效果。无机层的调制不仅增加了电荷从电极注入的阻挡高度，而且还形成了 PEI 层/BNNS 层界面，有利于陷阱的形成，从而有效地抑制了载流子的进一步传输。实验和模拟验证了三层结构的构建促进了电场再分布，从而显著提高了高温储能性能。200 °C 时，三层复合薄膜的能量密度为 3.81 J cm-3，充放电效率大于 90%，比 PEI 薄膜（0.44 J cm-3，充放电效率大于 90%）高 766%。值得注意的是，三层复合薄膜在高温下的储能性能远远优于已报道的高温聚合物电介质薄膜。这项工作证明了多层结构在高温下应用于聚合物介电复合薄膜的巨大潜力。

来源：复合材料力学仿真Composites FEM

【新文速递】2023年10月23日复合材料SCI期刊最新文章

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 StructuresDesign and evaluation of TPMS-inspired 3D-printed scaffolds for bone tissue engineering: enabling tailored mechanical and mass transport propertiesLi Zhitong, Chen Zhaobo, Chen Xiongbiao, Zhao Runchaodoi:10.1016/j.compstruct.2023.117638设计和评估用于骨组织工程的受 TPMS 启发的 3D 打印支架：实现量身定制的机械和质量传输特性Bone scaffolds in tissue engineering are used to provide mechanical support and facilitate bone regeneration. For this, mechanical and mass transport properties are of critical importance, yet compromised, to scaffold performance and remain to be solved. Herein, we propose novel strut-based scaffolds and design strategies that enable independent tailoring of topological, mechanical and mass transport properties. Scaffolds with different design parameters were characterized in terms of mechanical and mass transport properties through simulation analysis, and then they were fabricated by 3D printing for experimental verification. The simulation and experimental results showed that the proposed scaffolds exhibit controllable deformation modes and mass transport characteristics. The elastic modulus (0.58-4.12 GPa) and permeability (0.96×10-7-3.47×10-7 m2) of the designed structures fully meet the range of cancellous bone in existing literature. Moreover, we demonstrated that our designs enable scaffolds to decouple and individually tailor multi-physics properties at a given porosity, thus expanding the performance regulation space and providing guidance for designing scaffolds with desired properties.组织工程中的骨支架用于提供机械支撑和促进骨再生。为此，机械和质量传输特性对支架性能至关重要，但却受到影响，仍有待解决。在此，我们提出了基于支柱的新型支架和设计策略，可实现拓扑、机械和质量传输特性的独立定制。通过仿真分析，对不同设计参数的支架进行了力学和质量传输性能表征，然后通过三维打印制作支架并进行实验验证。模拟和实验结果表明，所提出的支架具有可控的变形模式和质量传输特性。设计结构的弹性模量（0.58-4.12 GPa）和渗透率（0.96×10-7-3.47×10-7 m2）完全符合现有文献中松质骨的范围。此外，我们还证明了我们的设计能使支架在给定孔隙率下解耦并单独定制多物理特性，从而扩大了性能调节空间，并为设计具有所需特性的支架提供指导。Composites Part A: Applied Science and ManufacturingThermal-field analytical modeling of machined surface layer in high-speed-dry milling UD-CF/PEEK considering thermal anisotropy and nonlinear thermal conductivityLiu Lei, Qu Da, Wang Jiacheng, Zhang Jin, Cao Huajun, Dong Xindoi:10.1016/j.compositesa.2023.107864考虑热各向异性和非线性导热性的 UD-CF/PEEK 高速干铣加工表面层热场分析模型The high-speed-dry (HSD) machining is now recognized as a strong potential dry-cutting technique to tackle the rapidly growing productivity demand of carbon-fiber-reinforced-polyetheretherketone (CF/PEEK). The thermal-field is an essential breakthrough for eliminating the severe thermal effect of cutting temperature beyond CF/PEEK glass transition temperature Tg. However, the anisotropy and temperature-sensitive thermal conductivity of CF/PEEK lead to great challenges in thermal analytical modeling. Addressing this issue, a novel thermal-field analytical model that incorporates fiber orientation-dominated thermal anisotropy is developed to investigate the thermal field of machined surface layer for unidirectional (UD) CF/PEEK HSD milling, where the nonlinear thermal conductivity of CF/PEEK are imported into this model. With experiment verification, the thermal-field model can forecast the spatio-temporal distribution of workpiece temperature. Then, the thermal mechanisms of fiber orientations and milling parameters are clarified to restrict workpiece temperature within the Tg for limited thermal damage and reveal the feasibility essence of CF/PEEK HSD milling.高速干式（HSD）加工是目前公认的一种潜力巨大的干式切削技术，可满足碳纤维增强聚醚醚酮（CF/PEEK）快速增长的生产率需求。热场是消除切割温度超过 CF/PEEK 玻璃转变温度 Tg 所产生的严重热效应的一个重要突破。然而，CF/PEEK 的各向异性和对温度敏感的热导率给热分析建模带来了巨大挑战。针对这一问题，我们开发了一种新型热场分析模型，该模型结合了纤维取向主导的热各向异性，用于研究单向 (UD) CF/PEEK HSD 铣削加工表面层的热场，并将 CF/PEEK 的非线性热导率导入该模型。通过实验验证，热场模型可以预测工件温度的时空分布。然后，阐明了纤维取向和铣削参数的热机理，从而将工件温度限制在 Tg 以限制热损伤，并揭示了 CF/PEEK HSD 铣削的可行性本质。Composites Part B: EngineeringEco-friendly, high-utilization, and easy-manufacturing bamboo units for engineered bamboo products: Processing and mechanical characterizationHuang Bin, Chen Lin, Wang Xianke, Ma Xinxin, Liu Huanrong, Zhang Xiubiao, Sun Fengbo, Fei Benhua, Fang Changhuadoi:10.1016/j.compositesb.2023.111073 用于竹制工程产品的生态友好型、高利用率和易于制造的竹单元：加工和机械特性分析Bamboo units used for manufacturing engineered bamboo products are typically processed by breaking and planing, resulting in products with high glue content, substantial costs, and adverse environmental impacts. To address these issues, a simple and effective approach for processing standard bamboo units, based on the natural form and structure of bamboo, is proposed and tested in this study. More specifically, bamboo splits were dried at 0.05 MPa pressure and 140 °C for about 2.5 h in a pressurizing device. After drying, the bamboo splits each formed an equal-arc shaped bamboo split (EASB) in which the inner and outer radii were roughly equal. The EASB unit represents a double breakthrough of a high material utilization rate (as high as 80%) and low damage to bamboo. Additionally, the appropriate drying technique improves the dimensional stability and retains the excellent mechanical properties of natural bamboo. This work demonstrates the concept of “natural form inspired design,” and the EASB provides a basis for wider applications of sustainable engineered bamboo products.用于制造竹制工程产品的竹材通常是通过打碎和刨削加工而成的，这导致产品含胶量高，成本高昂，并对环境造成不利影响。为解决这些问题，本研究根据竹子的自然形态和结构，提出并测试了一种简单有效的标准竹材加工方法。具体而言，竹片在 0.05 兆帕压力和 140 °C 的加压装置中干燥约 2.5 小时。干燥后，竹片各自形成一个内外半径大致相等的等弧形竹片（EASB）。等弧形竹片实现了材料利用率高（高达 80%）和竹材损坏率低的双重突破。此外，适当的干燥技术提高了尺寸稳定性，并保留了天然竹材的优良机械性能。这项工作体现了 "自然形态启发设计 "的理念，而 EASB 则为可持续工程竹制品的更广泛应用奠定了基础。Composites Science and TechnologyElectromechanical behavior and damage index system of 3D carbon fiber angle-interlock woven composites with FEA and data processing toolsWu Tianwei, Li Gen, Xue Yousong, Li Zhiyong, Gu Bohong, Sun Baozhongdoi:10.1016/j.compscitech.2023.110318 利用有限元分析和数据处理工具研究三维碳纤维角交织复合材料的机电行为和损伤指标体系The relationship between structural damage and electrical resistance change of carbon fiber reinforced composites is important to structural health monitoring. Here, we investigated the electromechanical behavior and damage index system for identification of various damage types in 3D angle-interlock woven composites under tensile loading in the warp direction. The mechanism of electrical resistance change was explored by combining current injected from both ends (Electrical current is in the plane of the laminate and goes through the entire cross section of the specimen) and current injected diagonally (Direction of electrical current between the in-plane direction and the through-thickness direction). A finite element model was established to analyze the electric potential distribution and tensile damage evolution process of composites. We found current injected from both ends can only detect with yarn damage and current injected diagonally can detect with matrix cracks, interface cracking and yarn damage. Based on the electrical resistance data of current injected diagonally, we used principal component analysis and K-means clustering methods to establish a damage index system to reflect the damage accumulation degree of different damage modes. The finite element analyses verified the rationality of the damage index system.碳纤维增强复合材料的结构损伤与电阻变化之间的关系对于结构健康监测非常重要。在此，我们研究了三维角交错编织复合材料在经向拉伸载荷作用下的机电行为和损伤指标体系，以识别各种损伤类型。我们结合从两端注入的电流（电流在层压板的平面上，穿过试样的整个横截面）和斜向注入的电流（电流方向介于平面方向和厚度方向之间），探讨了电阻变化的机理。我们建立了一个有限元模型来分析复合材料的电动势分布和拉伸损伤演变过程。我们发现从两端注入的电流只能检测到纱线损伤，而从对角线方向注入的电流可以检测到基体裂纹、界面裂纹和纱线损伤。根据斜向注入电流的电阻数据，我们采用主成分分析和 K-means 聚类方法建立了损伤指标体系，以反映不同损伤模式的损伤累积程度。有限元分析验证了损伤指标体系的合理性。来源：复合材料力学仿真Composites FEM