Composites Part C Open Access最新文献_第7页

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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引用次数: 0

Fatigue behavior and failure mechanism of 3D-printed continuous glass fiber-reinforced PLA composites under rotating bending fatigue 旋转弯曲疲劳下3d打印连续玻璃纤维增强PLA复合材料的疲劳行为及失效机理

IF 5.3 Q2 MATERIALS SCIENCE, COMPOSITES

Composites Part C Open Access

Pub Date : 2025-07-01 DOI: 10.1016/j.jcomc.2025.100623

Mehrnoosh Javadian, Ali Dadashi, Abbasali Bagheri, Mohammad Azadi

This study investigates the fatigue behavior and failure mechanisms of 3D-printed polylactic acid (PLA) composites reinforced with continuous glass fibers under rotating bending fatigue. Composite specimens were fabricated using a modified fused deposition modeling (FDM) printer with fiber volume fractions of 16 %. Fatigue testing was conducted under fully reversed loading at room temperature, and fracture surfaces were analyzed using field-emission scanning electron microscopy (FE-SEM). Results indicate that fiber reinforcement significantly enhances fatigue resistance, with fiber orientation (+45/-45) and infill density playing critical roles in improving performance. A Poisson regression model confirmed the statistical significance of all main effects and two interactions, with print direction having the greatest influence. Fractographic analysis revealed void, fiber breakage, and fiber-matrix debonding as key failure modes. The study provides crucial insights for optimizing composite materials for applications involving cyclic loading.

研究了连续玻璃纤维增强3d打印聚乳酸（PLA）复合材料在旋转弯曲疲劳下的疲劳行为和破坏机制。使用纤维体积分数为16%的改进熔融沉积建模（FDM）打印机制备复合材料样品。在室温下进行了完全反向载荷下的疲劳试验，并用场发射扫描电镜（FE-SEM）分析了断口表面。结果表明，纤维增强显著提高了材料的抗疲劳性能，纤维取向（+45/-45）和填充密度是提高材料抗疲劳性能的关键因素。泊松回归模型证实了所有主效应和两种相互作用的统计显著性，其中印刷方向的影响最大。断口分析显示，空洞、纤维断裂和纤维-基体脱粘是主要的破坏模式。该研究为优化复合材料的循环加载应用提供了重要的见解。

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引用次数: 0

Design and analysis of energy storage multifunctional composite structures with embedded lithium-ion batteries 嵌入式锂离子电池储能多功能复合材料结构设计与分析

IF 7 Q2 MATERIALS SCIENCE, COMPOSITES

Composites Part C Open Access

Pub Date : 2025-07-01 DOI: 10.1016/j.jcomc.2025.100631

Koranat Pattarakunnan , Joel L. Galos , Raj Das

Multifunctional carbon fibre reinforced polymer (CFRP) composite structures with embedded batteries can simultaneously carry mechanical loads and store and supply electrical energy have future potential applications in electric vehicles. This paper conducts a parametric study of CFRP laminates with embedded batteries using a finite element (FE) model that has been experimentally validated. The parametric study investigated the effects of number of embedded lithium-ion (Li-ion) polymer (LiPo) batteries (up to 400 batteries), their locations (up to a grid of 20 × 20 batteries) and thicknesses (4 mm, 2 mm and 1 mm), as well as CFRP fibre stacking sequences ([0],[0/90],[0/±45/90] and [±45]) on specific stiffness and strength (density normalised) and gravimetric energy density of multifunctional CFRP laminates. A similar FE parametric study on a curved CFRP vehicle roof with embedded batteries was also conducted. Embedded batteries can provide energy density of up to about 75 Wh/kg and 20 Wh/kg when 20 × 20 batteries were embedded in CFRP laminates and CFRP roof, respectively. However, they had adverse effects on specific mechanical properties of both CFRP laminates and CFRP roof with embedded batteries. It was suggested that the thickness of the embedded batteries should be carefully picked to achieve an optimal trade-off between desired energy density and resultant specific mechanical properties.

内置电池的多功能碳纤维增强聚合物（CFRP）复合材料结构可以同时承受机械载荷和储存和供应电能，在电动汽车上具有潜在的应用前景。本文采用有限元模型对嵌套电池的碳纤维复合材料层合板进行了参数化研究，并得到了实验验证。参数化研究调查了嵌入锂离子（Li-ion）聚合物（LiPo）电池的数量（最多400个电池）、它们的位置（最多20 × 20电池的网格）和厚度（4mm、2mm和1mm），以及CFRP纤维堆叠顺序（[0]、[0/90]、[0/±45/90]和[±45]）对多功能CFRP层压板的比刚度和强度（密度标准化）以及重力能量密度的影响。此外，还对一种嵌入电池的CFRP弯曲车顶进行了类似的有限元参数分析。当20 × 20电池分别嵌入CFRP层压板和CFRP屋顶时，可提供高达约75 Wh/kg和20 Wh/kg的能量密度。然而，它们对CFRP层压板和嵌套电池的CFRP屋顶的特定力学性能都有不利影响。建议仔细选择嵌入式电池的厚度，以在所需的能量密度和所得的特定机械性能之间实现最佳权衡。

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引用次数: 0

Addressing process-induced porosity variations in multiscale composite materials analysis using aggregated projection clustering and Halton sequence RVE sampling 利用聚合投影聚类和霍尔顿序列RVE采样处理多尺度复合材料分析中过程引起的孔隙度变化

IF 7 Q2 MATERIALS SCIENCE, COMPOSITES

Composites Part C Open Access

Pub Date : 2025-07-01 DOI: 10.1016/j.jcomc.2025.100625

Hamidreza Dehghani , Henri Perrin , Elias Belouettar-Mathis , Borek Patzák , Salim Belouettar

A challenge associated with the multiscale modeling of highly consolidated composites is the existing contact effects arising from the manufacturing process. In such cases, porosity significantly decreases as we approach the consolidation surfaces, leading to substantial variations in material behavior in those areas. To address this, we propose an unsupervised machine learning approach integrated with micro-computed tomography (

μ

CT) image processing and Asymptotic Homogenization (AH) for accurate and robust consideration of real microstructure as the basis for an upscaling process. This process employs systems of partial differential equations (PDEs) known as cell problems. This work introduces the Aggregated Vertical Projection Clustering (APC) method, which applies K-means clustering to partition the data into k groups based on porosity. We also present a novel porosity-based periodic cell selection strategy, which uses the Halton sequence to select representative volume element (RVE) cells for each cluster. The workflow generates computational meshes of RVE cells for Finite Element (FE) analysis, solves the cell problems required for upscaling, and calculates the effective heat conductivity. Statistical descriptions and representativity analyses demonstrate that the proposed methodology efficiently and accurately computes the effective properties in these challenging cases.

高固结复合材料的多尺度建模面临的挑战是制造过程中产生的现有接触效应。在这种情况下，当我们接近固结表面时，孔隙率显著降低，导致这些区域的材料行为发生实质性变化。为了解决这个问题，我们提出了一种集成微计算机断层扫描（μCT）图像处理和渐近均匀化（AH）的无监督机器学习方法，以准确和稳健地考虑真实微观结构作为升级过程的基础。这个过程采用偏微分方程（PDEs）系统，称为细胞问题。本文介绍了聚合垂直投影聚类（APC）方法，该方法采用k -means聚类将数据根据孔隙度划分为k组。我们还提出了一种新的基于孔隙度的周期细胞选择策略，该策略使用Halton序列为每个簇选择具有代表性的体积元素（RVE）细胞。该工作流生成用于有限元分析的RVE单元的计算网格，解决升级所需的单元问题，并计算有效导热系数。统计描述和代表性分析表明，所提出的方法在这些具有挑战性的情况下有效且准确地计算了有效属性。

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引用次数: 0

Enhanced compressive strength and impact resistance in hybrid fiber reinforced ternary-blended alkali-activated concrete: An experimental, weibull analysis and finite element simulation 混杂纤维增强三元混合碱活化混凝土的抗压强度和抗冲击性能：实验、威布尔分析和有限元模拟

IF 7 Q2 MATERIALS SCIENCE, COMPOSITES

Composites Part C Open Access

Pub Date : 2025-07-01 DOI: 10.1016/j.jcomc.2025.100629

Tejeswara Rao Maganti , Chandra S Kandikuppa , Hari K.R. Gopireddy , Revanth Dugalam , Krishna Rao Boddepalli

This study explores hybrid fiber-reinforced alkali-activated concrete (AAHFRC) as a sustainable solution, enhancing compressive strength and impact resistance through the bridging capacity of hybrid fibers. Utilizing a specialized ternary mix with FA: GGBS: SF in a 35:50:15 ratio with the hybrid interaction of steel, polypropylene, and glass fibers demonstrates the significant improving the impact resistance performance. Experiments were conducted on the compressive strength and impact resistance of AAHFRC in accordance with ACI 544 guidelines. Experimental results demonstrated a 63 % increase in compressive strength, with the highest value of 106.38 MPa recorded for the ASG2.0 hybrid mix, along with a significant improvement in impact resistance. The hybrid fiber mixes outperformed mono-fiber mixes, achieving the highest fracture impact energy (Ef) of 56 kN-m. The synergy factor further validated the effectiveness of hybrid systems, with ASG2.0 attaining a synergy index of 1.37, surpassing mono-fiber mixes. Complementing the experimental findings, statistical Weibull analysis and finite element analysis (FEA) using ANSYS were conducted. The Weibull analysis revealed strong reliability, with an R-squared value of 0.989, indicating high consistency in impact resistance performance. Explicit dynamic analysis using FEM verified improved stress distribution, reduced deformation, and a strong correlation between experimental and simulated results, with a difference of not more than 5 %. These outcomes demonstrate the potential of AAHFRC as a sustainable, durable, and high-performance material for advanced construction applications.

本研究探讨了混合纤维增强碱活化混凝土（AAHFRC）作为一种可持续的解决方案，通过混合纤维的桥接能力提高抗压强度和抗冲击性。利用FA: GGBS: SF以35:50:15的比例与钢、聚丙烯和玻璃纤维的混杂相互作用，可以显著提高抗冲击性能。按照ACI 544标准对AAHFRC的抗压强度和抗冲击性能进行了试验研究。实验结果表明，ASG2.0混合料的抗压强度提高了63%，最高达到106.38 MPa，抗冲击性也有显著提高。混合纤维的性能优于单纤维，达到了最高的56 kN-m断裂冲击能（Ef）。协同系数进一步验证了混合系统的有效性，ASG2.0的协同指数为1.37，超过了单纤维混合材料。结合实验结果，利用ANSYS进行了统计威布尔分析和有限元分析（FEA）。Weibull分析显示可靠性较强，r平方值为0.989，表明抗冲击性能一致性较高。采用有限元法进行显式动力分析，结果表明应力分布得到改善，变形减小，实验结果与模拟结果之间有很强的相关性，差异不超过5%。这些结果证明了AAHFRC作为一种可持续、耐用和高性能的先进建筑材料的潜力。

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引用次数: 0