Composites Part C Open Access最新文献_第10页

Analysis of the structure and characteristics of bioglass–iron oxide composite layers on Ti-6Al-4V alloy via electrophoretic deposition 电泳沉积Ti-6Al-4V合金生物玻璃-氧化铁复合层的结构与特性分析

IF 7 Q2 MATERIALS SCIENCE, COMPOSITES

Composites Part C Open Access

Pub Date : 2025-08-19 DOI: 10.1016/j.jcomc.2025.100639

Zahra Sohani, Hamed Jamshidi Aval, Sayed Mahmood Rabiee

This study investigates the structural and functional properties of bioglass–iron oxide (Fe₃O₄) composite layers deposited on Ti-6Al-4V substrates via electrophoretic deposition (EPD). Suspensions with varying Fe₃O₄ contents (10, 15, 25, and 50 wt %) were prepared to identify the optimal composition. SEM and elemental mapping revealed that the B90-F10 sample (90 % bioglass, 10 % Fe₃O₄) produced a more uniform and denser coating compared to other compositions, while minimizing porosity and crack formation. The Vickers microhardness of the B90-F10 coating reached 321.3 ± 3.4 HV, higher than that of the pure bioglass coating B100-F0 (295.1 ± 2.3 HV). Surface roughness measurements showed that B90-F10 had a lower average roughness (0.82 ± 0.41 µm) than B100-F0 (2.10 ± 0.46 µm), indicating a smoother, more compact surface. The mean coating thickness for B90-F10 was 148.32 ± 0.02 µm, slightly greater than B100-F0 (140.01 ± 0.01 µm). Contact angle tests confirmed improved hydrophilicity, with B90-F10 showing a reduced contact angle (22.56°) compared to the uncoated substrate (55.16°). Electrochemical tests revealed that although coatings slightly reduced corrosion resistance compared to bare alloy due to residual porosity, the addition of Fe₃O₄ significantly increased charge transfer resistance, indicating better barrier performance than pure bioglass coatings. In vitro bioactivity tests confirmed enhanced formation of hydroxyapatite layers, critical for osseointegration. These findings highlight the coatings’ capacity to augment implant performance by improving mechanical durability, surface characteristics, and bioactivity, thus offering a valuable functional enhancement beyond the untreated substrate.

研究了电泳沉积（EPD）在Ti-6Al-4V衬底上制备的生物玻璃-氧化铁（Fe₃O₄）复合层的结构和功能特性。制备了不同Fe₃O₄含量（10、15、25和50% wt %）的混悬液，以确定最佳组成。SEM和元素映射显示，B90-F10样品（90%生物玻璃，10% Fe₃O₄）与其他成分相比，产生了更均匀、更致密的涂层，同时最大限度地减少了孔隙度和裂纹的形成。B90-F10涂层的维氏显微硬度达到321.3±3.4 HV，高于纯生物玻璃涂层B100-F0（295.1±2.3 HV）。表面粗糙度测量表明，B90-F10的平均粗糙度（0.82±0.41µm）低于B100-F0(2.10±0.46µm)，表明表面更光滑，更致密。B90-F10的平均涂层厚度为148.32±0.02µm，略大于B100-F0（140.01±0.01µm）。接触角测试证实亲水性得到改善，与未涂覆的基材（55.16°）相比，B90-F10的接触角（22.56°）减小。电化学测试表明，尽管由于残余孔隙率的存在，涂层的耐腐蚀性略低于裸合金，但Fe₃O₄的加入显著提高了电荷转移阻力，表明涂层的阻隔性能优于纯生物玻璃涂层。体外生物活性测试证实羟基磷灰石层的形成增强，这对骨整合至关重要。这些发现强调了涂层通过提高机械耐久性、表面特性和生物活性来增强植入物性能的能力，从而提供了比未经处理的基底更有价值的功能增强。

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引用次数: 0

Thermoset (epoxy) - thermoplastic (polyetherimide) carbon fiber reinforced laminates featuring improved crack resistance in double cantilever beam tests due to hybridization 热固性（环氧）-热塑性（聚醚酰亚胺）碳纤维增强层压板，由于杂交，在双悬臂梁试验中具有更好的抗裂性

IF 7 Q2 MATERIALS SCIENCE, COMPOSITES

Composites Part C Open Access

Pub Date : 2025-08-19 DOI: 10.1016/j.jcomc.2025.100643

Kay A. Weidenmann , René Alderliesten , Julie J.E. Teuwen

Fiber-metal laminates are a well-known and established material concept featuring an enhanced crack propagation resistance when compared to their metal and fiber reinforced plastic (FRP) constituents. In this paper, this approach is transferred to purely carbon fiber reinforced plastic (CFRP) based laminates made from layers having polyetherimide (PEI) and epoxy matrices in an alternating laminate architecture. The laminates are manufactured via hot pressing. Double-cantilever beam (DCB) tests are performed on standard samples for both the hybrid laminates in different configurations as well for the both constituent materials, i.e. carbon fiber reinforced PEI (CFR-PEI) and carbon fiber reinforced epoxy. As the formation of an interphase is already reported in literature for this matrix combination, microstructural investigations have also been carried out in addition to fractography on crack surfaces. It is shown that the hybrid materials outperform both constituents regarding the crack resistance when crack initiation starts in the tougher CFR-PEI layer and the laminate layup is 0/90°. In the other configurations investigated, there is no significant effect. The energy dissipating mechanisms are crack jumping and the formation of several parallel cracks. Consequently, crack resistance in such hybrids might be controlled in future by adjusting the crack resistance of the constituents as well as the laminate architecture.

金属纤维层压板是一种众所周知的材料概念，与金属和纤维增强塑料（FRP）成分相比，它具有更强的抗裂纹扩展能力。在本文中，这种方法被转移到纯碳纤维增强塑料（CFRP）为基础的层叠板，该层叠板由具有聚醚酰亚胺（PEI）和环氧树脂基质的层在交替层叠结构中制成。层压板是通过热压制造的。双悬臂梁（DCB）测试在标准样品上进行了不同配置的混合层合板，以及两种组成材料，即碳纤维增强PEI （CFR-PEI）和碳纤维增强环氧树脂。由于文献中已经报道了这种基体组合的界面相的形成，除了对裂纹表面进行断口学研究外，还进行了显微组织研究。结果表明，在较硬的CFR-PEI层中，当层积为0/90°时，杂化材料的抗裂性能优于两种材料。在调查的其他配置中，没有显著的影响。能量耗散机制为裂纹跳跃和多个平行裂纹的形成。因此，今后可以通过调整复合材料的抗裂性能和层压结构来控制复合材料的抗裂性能。

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引用次数: 0

Review of State-of-the-art of structural health monitoring in hydrogen composite pressure vessels 氢复合材料压力容器结构健康监测研究进展

IF 7 Q2 MATERIALS SCIENCE, COMPOSITES

Composites Part C Open Access

Pub Date : 2025-08-19 DOI: 10.1016/j.jcomc.2025.100635

Lyazid Bouhala , Jérome Polesel , Argyrios Karatrantos , Séverine Perbal , Björn Senf , Alexander Hiekel , Heiner Reinhardt , Alexander Rauscher , Thomas Mäder

Ensuring the safety and durability of composite pressure vessels is critical due to their extensive use in aerospace, automotive, and energy sectors. This review examines recent advances in Structural Health Monitoring (SHM) technologies tailored for Composite Overwrapped Pressure Vessels (COPVs). Special focus is given to flexible strain sensors based on nanofillers such as carbon nanotubes, graphene, MXene, and polymer nanocomposites, which provide high sensitivity, stretchability, and tunable sensing behavior. Key sensing mechanisms including tunneling, piezo-resistivity, and crack propagation and fabrication methods influencing sensor performance and integration are discussed. Shape memory alloy (SMA) filament sensors are also analyzed for their exceptional fatigue resistance, elastic stretchability, and high gauge factors. Case studies demonstrate their practical effectiveness under cyclic pressure loading and burst tests. The review further highlights multifunctional composites integrating self-sensing features for next-generation smart pressure vessels. Challenges related to sensor embedding, environmental impacts, data processing, and scalability are addressed. Future research directions emphasize multi-scale modeling, machine learning for damage detection and prognosis, and fully autonomous SHM systems enabling real-time safety management. These advances are poised to enhance reliability, reduce maintenance costs, and extend the operational life of composite pressure vessels in demanding industrial applications.

由于复合材料压力容器在航空航天、汽车和能源领域的广泛应用，确保其安全性和耐久性至关重要。本文综述了复合材料包覆压力容器（copv）结构健康监测（SHM）技术的最新进展。特别关注基于纳米填充物的柔性应变传感器，如碳纳米管、石墨烯、MXene和聚合物纳米复合材料，它们提供高灵敏度、可拉伸性和可调谐的传感行为。讨论了影响传感器性能和集成的关键传感机制，包括隧道效应、压电阻率、裂纹扩展和制造方法。形状记忆合金（SMA）长丝传感器也因其优异的抗疲劳性、弹性拉伸性和高规格因素而被分析。实例研究证明了该方法在循环压力加载和爆破试验中的实际有效性。该综述进一步强调了集成自传感功能的多功能复合材料用于下一代智能压力容器。解决了与传感器嵌入、环境影响、数据处理和可扩展性相关的挑战。未来的研究方向强调多尺度建模、用于损伤检测和预测的机器学习，以及实现实时安全管理的全自动SHM系统。这些进步将提高可靠性，降低维护成本，并延长复合压力容器在苛刻的工业应用中的使用寿命。

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引用次数: 0

Machining-induced burr distribution along hole contours in unidirectional carbon fibre-reinforced polymer (UD-CFRP) composites 单向碳纤维增强聚合物（UD-CFRP）复合材料孔轮廓加工诱导毛刺分布

IF 7 Q2 MATERIALS SCIENCE, COMPOSITES

Composites Part C Open Access

Pub Date : 2025-08-19 DOI: 10.1016/j.jcomc.2025.100640

Norbert Geier, Gergely Magyar

Machining-induced burr formation in carbon fibre-reinforced polymer (CFRP) composites is difficult to predict and control, mainly due to the anisotropy and inhomogeneity of the fibrous composite, as well as the rapid tool condition change due to the abrasive tool wear. The main aim of this study is to develop a model to determine the density and distribution functions of risky fibre cutting angles where machining-induced burrs are expected to be formed when hole-machining CFRPs. Four models were introduced, and their adequacy was analysed. The coefficients of the models were determined using datasets of three previous research projects (i.e., 2 380 808 data points) and validated through a fourth one (208 571 data points) where hole machining experiments were carried out using different tools, parameters and setups. The normality of the risky fibre cutting angles was tested through the Shapiro-Wilk and Kolmogorov-Smirnov statistical tests, and the distribution was found to be not Gaussian. The developed trigonometric model shows a good fit to the data points, i.e., the determination coefficient is at least 0.949 for each dataset. The results indicate that machining-induced burr formation is most probable at a fibre cutting angle of 118–133°, and 60 % of burr occurrences fall within the 110°–160° range when the critical fibre cutting angle is 133° These findings provide a foundation for the industrial adoption of advanced machining strategies for fibrous polymer composites, enabling a significant reduction of machining‑induced burrs in CFRPs.

碳纤维增强聚合物（CFRP）复合材料加工诱导毛刺的形成是难以预测和控制的，这主要是由于纤维复合材料的各向异性和非均匀性，以及磨具磨损引起的刀具状态的快速变化。本研究的主要目的是建立一个模型，以确定在孔加工cfrp时可能形成加工诱发毛刺的危险纤维切割角的密度和分布函数。介绍了四种模型，并对其充分性进行了分析。模型的系数是利用之前三个研究项目的数据集（即2 380 808个数据点）确定的，并通过第四个研究项目（208 571个数据点）进行验证，其中使用不同的工具，参数和设置进行孔加工实验。通过Shapiro-Wilk和Kolmogorov-Smirnov统计检验检验了危险纤维切割角的正态性，发现其分布是非高斯分布。所建立的三角模型与数据点拟合良好，每个数据集的决定系数至少为0.949。结果表明，纤维切削角度为118-133°时，加工诱发毛刺的可能性最大，当纤维切削角度为133°时，60%的毛刺发生在110°-160°范围内。这些发现为工业采用先进的纤维聚合物复合材料加工策略提供了基础，使碳纤维复合材料的加工诱发毛刺显著减少。

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引用次数: 0

Impact resistance of heated and unheated two-way slab reinforced with basalt fiber 玄武岩纤维增强加热与未加热双向板的抗冲击性能

IF 7 Q2 MATERIALS SCIENCE, COMPOSITES

Composites Part C Open Access

Pub Date : 2025-08-13 DOI: 10.1016/j.jcomc.2025.100638

Ahmed Ashteyat , Ala T. Obaidat , Tarik Kharabsheh , Ahmed Fayez , Ahmad Al-Khreisat , Mu'tasim Abdel-Jaber

This research investigates the effect of using basalt fiber with different ratios on the impact resistance of heated and unheated two-way slab. Twelve heated and unheated two-way slab specimens of (1.05 m x 1.05 m x 0.07 m) were cast with different basalt fiber ratios of (0.25, 0.50, 0.75, 1.00, and 1.25) % by weight of cement and two fiber lengths of 12 and 24 mm have been exposed to ambient temperature and elevated temperature of (600 °C). This experiment investigates the effect of basalt fiber on the behavior of two-way slab in terms of compressive strength of concrete, punching shear failure, deflection, stiffness, and induced strain. The results showed that adding basalt fibers with different ratios experienced minor improvements in the concrete compressive strength for all specimens. The application of the impact load resulted in the formation of radial and conic cracks originating at the center of the specimen. These cracks indicated that the primary mode of failure is punching shear. Additionally, in this study, it was observed that a gradual increase in the proportion of basalt fibers led to a reduction in both the length and number of cracks. Moreover, for the pattern of the cracks due to static load, it was observed that the development of conical cracks was a result of overloading. The specimen incorporating a 24 mm basalt fiber at a 1 % ratio under unheated conditions demonstrated the significant improvement in performance regarding cracking compared to control. The stiffness and deflection of the specimens were improved by increasing the proportion of basalt fiber. Additionally, employing 24 mm fibers resulted in reduced deflection and increased stiffness compared to using 12 mm fibers.

研究了玄武岩纤维不同配比对加热和未加热双向板抗冲击性能的影响。12个加热和未加热的双向板试件（1.05 m x 1.05 m x 0.07 m）浇铸了不同的玄武岩纤维比（0.25、0.50、0.75、1.00和1.25）%的水泥重量，两种纤维长度分别为12和24 mm，暴露在环境温度和高温（600°C）下。本试验从混凝土抗压强度、冲剪破坏、挠度、刚度和诱导应变等方面考察了玄武岩纤维对双向板性能的影响。结果表明，添加不同比例的玄武岩纤维对各试件的抗压强度均有较小的改善。冲击载荷的作用导致试样中心形成径向裂纹和锥形裂纹。这些裂缝表明，主要破坏方式为冲剪破坏。此外，在本研究中还观察到，随着玄武岩纤维比例的逐渐增加，裂缝的长度和数量都会减少。此外，对于静荷载引起的裂纹模式，观察到锥形裂纹的发展是超载的结果。在不加热的条件下，以1%的比例加入24毫米玄武岩纤维的试样与对照组相比，在开裂方面表现出显著的改善。增加玄武岩纤维的掺量可以改善试件的刚度和挠度。此外，与使用12毫米纤维相比，使用24毫米纤维减少了挠度，增加了刚度。

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引用次数: 0

Recent progress in flame retardancy of graphene and bio-based sustainable flame retardants for polymer composite applications 石墨烯和生物基可持续阻燃剂在聚合物复合材料中的阻燃研究进展

IF 7 Q2 MATERIALS SCIENCE, COMPOSITES

Composites Part C Open Access

Pub Date : 2025-08-12 DOI: 10.1016/j.jcomc.2025.100637

Suman Kumar Ghosh , Manjusri Misra , Alper Kiziltas , Shawn Prevoir , Amar K. Mohanty

To address the restricted application of halogenated flame retardants (FRs), both industrial and academic sectors have endeavored to produce environmentally friendly, effective, and low-toxicity flame retardants for polymers. Bio-based FRs have attracted considerable interest due to their cost-effectiveness, widespread availability, and accessibility. Conversely, nanostructured graphene-based sustainable FRs provide further advantages to polymer composites beyond fire prevention, such as enhanced resistance to degradation, increased thermal stability, mechanical strength and extended lifespan. This review aims to provide a comprehensive summary of the flame retardancy characteristics of polymers and their composites with newly developed bio-based and graphene-based sustainable FRs. The flame-retardant properties, mechanism, and synergistic effects of the recently developed graphene and bio-based (lignin, phytic acid, chitosan, tannic acid, polydopamine, vegetable oil, biocarbon and keratinous fiber) polymer composites are thoroughly discussed in this article. Graphene-based FRs enhance polymer flame resistance by dissipating heat, forming protective barriers, and promoting char formation, reducing heat and gas transfer. Similarly, nitrogen- and phosphorus-rich bio-based FRs improve fire safety by forming dense char layers that block heat and suppress flammable gas release. The superior flame retardancy of these FR-loaded polymer composites allows for their application across various industry sectors, including automotive, aerospace, electronics, military, and construction. However, challenges such as compatibility between the polymer matrix and FRs, expensive and complicated fabrication processes, limitations of raw material supplies and industrial scalability need to be further researched. In conclusion, these FRs offer a promising path toward safer, more effective, per- and polyfluoroalkyl substances (PFAS)-free and more sustainable flame-resistant polymer composites in key industrial sectors.

为解决卤代阻燃剂应用受限的问题，工业界和学术界都在努力开发环保、高效、低毒的聚合物阻燃剂。生物基燃料燃料因其成本效益、广泛可用性和可及性而引起了相当大的兴趣。相反，纳米结构石墨烯基可持续阻燃材料除了防火之外，还为聚合物复合材料提供了进一步的优势，如增强的抗降解性、提高的热稳定性、机械强度和延长的使用寿命。本文综述了近年来生物基和石墨烯基复合材料的阻燃性能及其复合材料的阻燃性能，并对近年来石墨烯与生物基复合材料（木质素、植酸、壳聚糖、单宁酸、聚多巴胺、植物油、生物炭和角化纤维）的阻燃性能、阻燃机理及协同效应进行了较为深入的探讨。石墨烯基fr通过散热、形成保护屏障、促进炭的形成、减少热量和气体传递来增强聚合物的阻燃性。同样，富含氮和磷的生物基FRs通过形成致密的炭层来阻止热量和抑制可燃气体的释放，从而提高了消防安全性。这些fr负载的聚合物复合材料具有优异的阻燃性，可以应用于各种工业领域，包括汽车、航空航天、电子、军事和建筑。然而，诸如聚合物基体与fr之间的相容性、昂贵和复杂的制造工艺、原材料供应的限制以及工业可扩展性等挑战需要进一步研究。总之，这些fr为关键工业部门提供了一条更安全、更有效、不含全氟和多氟烷基物质（PFAS）和更可持续的阻燃聚合物复合材料的有希望的道路。

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引用次数: 0

Fibre-orientation-driven defect probability mapping for machining-induced delamination and burr minimisation in carbon fibre-reinforced polymer (CFRP) composites 碳纤维增强聚合物（CFRP）复合材料加工诱导分层和毛刺最小化的纤维取向驱动缺陷概率映射

IF 7 Q2 MATERIALS SCIENCE, COMPOSITES

Composites Part C Open Access

Pub Date : 2025-08-12 DOI: 10.1016/j.jcomc.2025.100636

Norbert Geier

Machining-induced burrs and delamination compromise the integrity of polymer composite components reinforced by chopped carbon tows. An image-based optimisation algorithm was therefore developed that locates the ideal hole centre within the preform allowance to minimise defect risk. High-resolution images, captured under multiple lighting conditions, are processed to generate a probability map of burr and delamination formation. Then, recursive convolution yielded a matrix whose minima identified the optimal hole position. First, edge trimming experiments were conducted to determine the arguments (critical fibre cutting angle and its range) of the developed algorithm. Up-milling was confirmed to outperform down-milling, yielding an order-of-magnitude smaller burr heights and a narrower defect-critical fibre cutting angle range. Then, based on the edge trimming results, holes were circular-milled, and demonstrated that the optimised “best-case” centre reduced average contour height by 64.99 % and contour-depth by 86.51 %, while burr- and delamination-area metrics improved by 84.90 % and 77.07 %, respectively, underlying the efficiency and importance of the proposed method. Implemented at TRL 4 with standard CNC equipment and open-source Python scripts, the method offers a practical framework for integrating burr- and delamination minimisation into CFRP component design and manufacturing process planning.

加工引起的毛刺和分层损害了切割碳束增强聚合物复合材料组件的完整性。因此，开发了一种基于图像的优化算法，可以在预成形余量范围内定位理想的孔中心，以最大限度地降低缺陷风险。在多种光照条件下捕获的高分辨率图像经过处理，生成毛刺和分层形成的概率图。然后，递归卷积得到一个矩阵，其最小值确定最优孔位置。首先，进行了边缘修剪实验，确定了算法的参数（临界纤维切割角及其范围）。经证实，上铣削优于下铣削，毛刺高度更小，缺陷临界纤维切削角度范围更窄。然后，基于边缘修剪结果，对孔进行圆铣，并证明优化的“最佳情况”中心将平均轮廓高度降低了64.99%，轮廓深度降低了86.51%，而毛刺和分层面积指标分别提高了84.90%和77.07%，表明了所提方法的效率和重要性。该方法在TRL 4上使用标准CNC设备和开源Python脚本实现，为将毛刺和分层最小化集成到CFRP组件设计和制造过程规划中提供了实用框架。

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引用次数: 0

Strain and damage sensing performance of functionally graded nanocomposite lattices enabled by DLP 3D printing DLP 3D打印实现功能梯度纳米复合材料晶格的应变和损伤传感性能

IF 7 Q2 MATERIALS SCIENCE, COMPOSITES

Composites Part C Open Access

Pub Date : 2025-08-07 DOI: 10.1016/j.jcomc.2025.100634

Omar Waqas Saadi , Andreas Schiffer , S Kumar

This research examines the mechanical and piezoresistive characteristics of geometrically graded octet and kelvin lattices fabricated via Digital Light Processing (DLP) additive manufacturing technique. The geometrically graded lattice structures feature varying unit cell sizes with constant relative density (20, 30, and 40 %), and are composed of electrically conductive nanocomposite photoresin loaded with 0.05 phr multi-walled carbon nanotubes (MWCNTs). Under monotonic compression, the peak stress and energy absorption of the graded octet lattice are found to rise with increasing level of gradation, reporting enhancements in the latter properties by factors of up to 2.6 and 2.0, respectively, in comparison to their non-graded counterparts of equal weight. In contrast, the graded kelvin lattice structures show lower enhancements in energy absorption of up to 1.2 times the non-graded equivalent. The piezoresistive response of both octet and kelvin lattices is characterized by a sharp initial drop in electrical resistance followed by a nonlinear response that shows signatures related to distinct failure processes observed in the studied structures. The initial gauge factor of the lattice structures is found to increase with increasing level of gradation and relative density. The geometric gradients also enhance the structure’s recoverability, allowing the struts in the softer layers to fold and unfold during cyclic compressive loading, yielding enhanced cyclic stability in piezoresistive behavior. The findings of this study suggest that the adoption of functional geometry gradients in nanocomposite lattices can assist in achieving enhanced energy absorption and strain/damage sensing functionalities under various loading conditions.

本研究考察了通过数字光处理（DLP）增材制造技术制造的几何梯度八元体和开尔文晶格的机械和压阻特性。几何梯度晶格结构具有不同的单元尺寸和恒定的相对密度（20%，30%和40%），由导电纳米复合光树脂负载0.05 phr多壁碳纳米管（MWCNTs）组成。在单调压缩下，梯度八元晶格的峰值应力和能量吸收随着梯度水平的增加而增加，与同等重量的非梯度八元晶格相比，后者的性能分别提高了2.6和2.0倍。相比之下，梯度开尔文晶格结构在能量吸收方面表现出较低的增强，高达非梯度等效的1.2倍。八极体和开尔文晶格的压阻响应的特征是电阻的急剧初始下降，然后是非线性响应，显示与所研究结构中观察到的不同失效过程相关的特征。发现晶格结构的初始规范因子随层序和相对密度的增加而增加。几何梯度还增强了结构的可恢复性，允许较软层中的支撑在循环压缩载荷下折叠和展开，从而增强了压阻行为的循环稳定性。本研究的结果表明，在纳米复合材料晶格中采用功能几何梯度有助于在各种载荷条件下实现增强的能量吸收和应变/损伤传感功能。

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引用次数: 0

Bayesian modelling approach to hydrogen permeation in fibre-reinforced polymer composites 纤维增强聚合物复合材料氢渗透的贝叶斯建模方法

IF 7 Q2 MATERIALS SCIENCE, COMPOSITES

Composites Part C Open Access

Pub Date : 2025-08-05 DOI: 10.1016/j.jcomc.2025.100630

Andrew Angus , Mustafa Okumuş , Łukasz Figiel

A Bayesian modelling approach is proposed to enable uncertainty quantification of hydrogen permeation in fibre-reinforced polymer composites. Specifically, the approach combines surrogate modelling via Gaussian Process (GP) regression, Bayesian optimisation and Markov Chain Monte Carlo (MCMC) to predict uncertainties in constituent (input) and overall (output) permeability across selected composite scales. By utilising training data from physics-based models (both numerical and analytical) and some experimental data available in the literature, the probabilistic approach is illustrated with examples demonstrating its capability in statistical inference of fibre permeability at the microscale, uncertainty quantification of effective permeability in a multilayered system, and simple probabilistic design at the component level.

提出了一种贝叶斯建模方法来实现纤维增强聚合物复合材料中氢渗透的不确定量化。具体来说，该方法结合了通过高斯过程（GP）回归、贝叶斯优化和马尔可夫链蒙特卡罗（MCMC）的代理建模，以预测在选定的复合尺度上组成（输入）和总体（输出）渗透率的不确定性。通过利用基于物理的模型（数值和解析）的训练数据以及文献中可用的一些实验数据，用实例说明了概率方法在微观尺度上纤维渗透率的统计推断、多层系统中有效渗透率的不确定性量化以及部件级别的简单概率设计方面的能力。

引用次数: 0

Effective suppression of machining-induced interlayer damage in machined holes of Al/CFRP stacks 有效抑制Al/CFRP叠层加工孔层间损伤

IF 5.3 Q2 MATERIALS SCIENCE, COMPOSITES

Composites Part C Open Access

Pub Date : 2025-07-01 DOI: 10.1016/j.jcomc.2025.100627

Balázs Markó , Szilárd Seprős , Jinyang Xu , Norbert Geier

Aluminium/carbon fibre reinforced polymer (Al/CFRP) composite stacks combine the high strength-to-weight ratio of the CFRP with the ductility and impact resistance of aluminium. Due to their excellent mechanical properties, Al/CFRP stacks are becoming increasingly popular in major industrial fields such as aerospace and automotive. However, mechanical machining of these materials, particularly at the interlayer regions, presents significant challenges, notably the formation of interlayer burrs. To address this issue, we introduce an innovative hole-making technology designed to minimise machining-induced interlayer burr formation. The novel technology integrates helical and spiral interpolation strategies to reduce axial force at the interlayer interfaces. We validated the efficiency of the novel technology through a series of machining experiments, employing a Central Composite Inscribed (CCI) experimental design. The experiments were performed on a three-axis CNC milling centre, with burr measurements obtained using a Keyence VR-5000 3D profilometer. Maximum burr heights were recorded along the hole contours at one-degree intervals. Our findings demonstrate a significant reduction (28 %) in interlayer burr formation in unidirectional carbon fibre-reinforced polymer (UD-CFRP) plates when utilising the proposed technique. These results suggest that our developed method is promising to improve machining quality in Al/CFRP stacks, meriting further investigation and development.

铝/碳纤维增强聚合物（Al/CFRP）复合材料堆结合了CFRP的高强度重量比和铝的延展性和抗冲击性。由于其优异的机械性能，Al/CFRP叠层在航空航天和汽车等主要工业领域越来越受欢迎。然而，这些材料的机械加工，特别是在层间区域，提出了重大的挑战，特别是层间毛刺的形成。为了解决这个问题，我们引入了一种创新的制孔技术，旨在最大限度地减少加工引起的层间毛刺的形成。该新技术集成了螺旋和螺旋插补策略，以减小层间界面处的轴向力。我们通过一系列的加工实验验证了新技术的效率，采用中心复合材料雕刻（CCI）实验设计。实验在三轴数控铣削中心进行，毛刺测量使用Keyence VR-5000 3D轮廓仪。沿孔轮廓每隔一度记录最大毛刺高度。我们的研究结果表明，当使用所提出的技术时，单向碳纤维增强聚合物（UD-CFRP）板的层间毛刺形成显著减少（28%）。这些结果表明，我们所开发的方法有望提高Al/CFRP叠层的加工质量，值得进一步研究和开发。

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