Composites Science and Technology最新文献_第4页

A novel algorithm for generating RVEs of continuous fiber reinforced composites with high fiber volume fraction 一种高纤维体积分数连续纤维增强复合材料RVEs生成新算法

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-03-22 Epub Date: 2026-01-01 DOI: 10.1016/j.compscitech.2025.111505

Wujie Chen , Kunkun Fu , Yan Li

A novel algorithm was developed for generating representative volume elements (RVEs) of randomly distributed continuous fiber reinforced composites (CFRCs) with high fiber volume fraction, based on a modified optimization approach of two-dimensional packing problems. This study presents, for the first time, a novel application of two-dimensional packing algorithms to composite RVE modeling, enabling the generation of RVEs with high fiber volume fractions (FVFs). To simultaneously satisfy inter-fiber distance constraints and ensure randomness in fiber distribution, a parameter representing the inter-fiber distance was incorporated into the constraint equations of the optimization model and was specified to follow a uniform random distribution. Fiber diameters can be defined as either constant values or assigned based on statistical distribution functions. The algorithm successfully achieved fiber volume fractions of up to 80 % while maintaining sufficient inter-fiber distances to enable finite element meshing of the RVEs. Moreover, the proposed method exhibited comparatively high computational efficiency over several existing RVE generation techniques for CFRCs. The spatial randomness of the fiber arrangement was confirmed by analyzing the generated RVEs with various statistical functions. Finally, the validity of the RVEs was verified by comparing finite element simulation results with experimental mechanical property data from T700/7901 epoxy composites, demonstrating the effectiveness of the proposed algorithm.

针对高纤维体积分数随机分布连续纤维增强复合材料（CFRCs）的代表性体积元问题，提出了一种基于改进的二维布局优化方法的新算法。该研究首次提出了二维填充算法在复合RVE建模中的新应用，能够生成具有高纤维体积分数（FVFs）的RVE。为了同时满足光纤间距离约束和保证光纤分布的随机性，在优化模型的约束方程中加入了一个表示光纤间距离的参数，并使其服从均匀随机分布。纤维直径既可以定义为常数，也可以根据统计分布函数分配。该算法成功地实现了高达80%的光纤体积分数，同时保持了足够的光纤间距离，使rve能够进行有限元网格划分。此外，与现有的几种CFRCs RVE生成技术相比，该方法具有较高的计算效率。利用各种统计函数对生成的rve进行分析，证实了纤维排列的空间随机性。最后，将有限元模拟结果与T700/7901环氧复合材料力学性能实验数据进行对比，验证了RVEs算法的有效性。

{"title":"A novel algorithm for generating RVEs of continuous fiber reinforced composites with high fiber volume fraction","authors":"Wujie Chen , Kunkun Fu , Yan Li","doi":"10.1016/j.compscitech.2025.111505","DOIUrl":"10.1016/j.compscitech.2025.111505","url":null,"abstract":"<div><div>A novel algorithm was developed for generating representative volume elements (RVEs) of randomly distributed continuous fiber reinforced composites (CFRCs) with high fiber volume fraction, based on a modified optimization approach of two-dimensional packing problems. This study presents, for the first time, a novel application of two-dimensional packing algorithms to composite RVE modeling, enabling the generation of RVEs with high fiber volume fractions (FVFs). To simultaneously satisfy inter-fiber distance constraints and ensure randomness in fiber distribution, a parameter representing the inter-fiber distance was incorporated into the constraint equations of the optimization model and was specified to follow a uniform random distribution. Fiber diameters can be defined as either constant values or assigned based on statistical distribution functions. The algorithm successfully achieved fiber volume fractions of up to 80 % while maintaining sufficient inter-fiber distances to enable finite element meshing of the RVEs. Moreover, the proposed method exhibited comparatively high computational efficiency over several existing RVE generation techniques for CFRCs. The spatial randomness of the fiber arrangement was confirmed by analyzing the generated RVEs with various statistical functions. Finally, the validity of the RVEs was verified by comparing finite element simulation results with experimental mechanical property data from T700/7901 epoxy composites, demonstrating the effectiveness of the proposed algorithm.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"276 ","pages":"Article 111505"},"PeriodicalIF":9.8,"publicationDate":"2026-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The electrical resistivity of CB–polymer piezoelectric hybrid nanocomposites: Experimental and micromechanical studies cb -聚合物压电杂化纳米复合材料的电阻率：实验和微力学研究

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-03-22 Epub Date: 2025-12-29 DOI: 10.1016/j.compscitech.2025.111504

Masoumeh Khamehchi , Ziwen Zhao , Mohammad Javad Mahmoodi , Zhenjin Wang , Fumio Narita

Hybrid polymer nanocomposites combining conductive and piezoelectric phases hold promising applications for flexible sensing and energyharvesting, yet their coupled transport mechanisms remain unclear. Here, we investigate the electrical resistivity of carbon black (CB)–potassium sodium niobate (KNN)–epoxy composites through systematic experiments and micromechanical modeling. Resistivity measurements across varying CB contents reveal a sharp percolation-driven decrease, while incorporation of KNN preserves piezoelectric functionality but elevates resistivity compared with binary CB/epoxy systems, enabling a tunable balance between conductivity and sensitivity. To elucidate this interplay, we propose a modified simplified unit cell model that integrates interphase conductivity and quantum tunneling resistance at CB–epoxy interfaces. The model reproduces experimental data with <5 % overall coefficient of variation and clarifies how KNN dispersion modulates percolation thresholds and tunneling efficiency. This combined framework establishes design guidelines for lead-free, high-performance piezoelectric nanocomposites and supports their future application in wearable health monitoring and structural sensing.

结合导电和压电相的杂化聚合物纳米复合材料在柔性传感和能量收集方面具有很好的应用前景，但它们的耦合传输机制尚不清楚。本文通过系统实验和微观力学模型研究了炭黑(CB) -铌酸钾钠(KNN) -环氧复合材料的电阻率。不同CB含量的电阻率测量结果显示，渗透驱动的电阻率急剧下降，而与二元CB/环氧树脂体系相比，KNN的加入保留了压电功能，但提高了电阻率，从而实现了电导率和灵敏度之间的可调平衡。为了阐明这种相互作用，我们提出了一个改进的简化单元胞模型，该模型集成了cb -环氧树脂界面的界面电导率和量子隧道阻力。该模型以5%的总变异系数再现了实验数据，并阐明了KNN弥散如何调节渗透阈值和隧道效率。该组合框架为无铅高性能压电纳米复合材料建立了设计指南，并支持其未来在可穿戴健康监测和结构传感方面的应用。

{"title":"The electrical resistivity of CB–polymer piezoelectric hybrid nanocomposites: Experimental and micromechanical studies","authors":"Masoumeh Khamehchi , Ziwen Zhao , Mohammad Javad Mahmoodi , Zhenjin Wang , Fumio Narita","doi":"10.1016/j.compscitech.2025.111504","DOIUrl":"10.1016/j.compscitech.2025.111504","url":null,"abstract":"<div><div>Hybrid polymer nanocomposites combining conductive and piezoelectric phases hold promising applications for flexible sensing and energyharvesting, yet their coupled transport mechanisms remain unclear. Here, we investigate the electrical resistivity of carbon black (CB)–potassium sodium niobate (KNN)–epoxy composites through systematic experiments and micromechanical modeling. Resistivity measurements across varying CB contents reveal a sharp percolation-driven decrease, while incorporation of KNN preserves piezoelectric functionality but elevates resistivity compared with binary CB/epoxy systems, enabling a tunable balance between conductivity and sensitivity. To elucidate this interplay, we propose a modified simplified unit cell model that integrates interphase conductivity and quantum tunneling resistance at CB–epoxy interfaces. The model reproduces experimental data with <5 % overall coefficient of variation and clarifies how KNN dispersion modulates percolation thresholds and tunneling efficiency. This combined framework establishes design guidelines for lead-free, high-performance piezoelectric nanocomposites and supports their future application in wearable health monitoring and structural sensing.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"276 ","pages":"Article 111504"},"PeriodicalIF":9.8,"publicationDate":"2026-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145882967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrated capacitive-resistive multiplexing technology for achieving pressure-strain decoupling in dual-parameter flexible sensor 实现双参数柔性传感器压力-应变解耦的集成容阻复用技术

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-03-22 Epub Date: 2026-01-02 DOI: 10.1016/j.compscitech.2026.111518

Shixue He , Jian Wu , Qiandiao Wei , Zhihao Chen , Shouyao Liu , Benlong Su , Youshan Wang

Flexible sensors are widely used in various fields but still encounter significant challenges (crosstalk of electromechanical signals, internal information monitoring) in monitoring complex environment. To address this challenge, we report a dual-parameter flexible pressure sensor based on a capacitive-resistive multiplexing architecture that ensures multiple parameter acquisition. The dual-parameter flexible sensor comprises a pressure-insensitive strain sensing unit (NR-CNT/GO) and a cross-response pressure sensing unit (PDMS/CNT porous structure). The sensor shows excellent stability and responsiveness with a pressure range of 0–1000 kPa or a strain range of 0–150 % under a single stimulus. Additionally, the sensor has excellent resolution under dual stimuli, and the deviation between the theoretical model decoupling and the experimental data of the pressure sensing unit with cross-response is less than 13 %. Finally, a monitoring system with the sensor embedded in the rubber wheel (broad temperature range environment) demonstrates the application potential of the designed sensor for multi-parameter sensing under complex conditions.

柔性传感器被广泛应用于各个领域，但在复杂环境的监测中仍面临着重大挑战（机电信号串扰、内部信息监测）。为了解决这一挑战，我们报告了一种基于容阻复用架构的双参数柔性压力传感器，可确保多参数采集。双参数柔性传感器包括一个压力不敏感应变传感单元（NR-CNT/GO）和一个交叉响应压力传感单元（PDMS/CNT多孔结构）。该传感器在单次刺激下的压力范围为0 - 1000kpa，应变范围为0 - 150%，具有良好的稳定性和响应性。此外，该传感器在双重刺激下具有良好的分辨率，具有交叉响应的压力传感单元的理论模型解耦与实验数据的偏差小于13%。最后，通过将传感器嵌入橡胶轮（宽温度范围环境）的监测系统，验证了所设计传感器在复杂条件下多参数传感的应用潜力。

{"title":"Integrated capacitive-resistive multiplexing technology for achieving pressure-strain decoupling in dual-parameter flexible sensor","authors":"Shixue He , Jian Wu , Qiandiao Wei , Zhihao Chen , Shouyao Liu , Benlong Su , Youshan Wang","doi":"10.1016/j.compscitech.2026.111518","DOIUrl":"10.1016/j.compscitech.2026.111518","url":null,"abstract":"<div><div>Flexible sensors are widely used in various fields but still encounter significant challenges (crosstalk of electromechanical signals, internal information monitoring) in monitoring complex environment. To address this challenge, we report a dual-parameter flexible pressure sensor based on a capacitive-resistive multiplexing architecture that ensures multiple parameter acquisition. The dual-parameter flexible sensor comprises a pressure-insensitive strain sensing unit (NR-CNT/GO) and a cross-response pressure sensing unit (PDMS/CNT porous structure). The sensor shows excellent stability and responsiveness with a pressure range of 0–1000 kPa or a strain range of 0–150 % under a single stimulus. Additionally, the sensor has excellent resolution under dual stimuli, and the deviation between the theoretical model decoupling and the experimental data of the pressure sensing unit with cross-response is less than 13 %. Finally, a monitoring system with the sensor embedded in the rubber wheel (broad temperature range environment) demonstrates the application potential of the designed sensor for multi-parameter sensing under complex conditions.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"276 ","pages":"Article 111518"},"PeriodicalIF":9.8,"publicationDate":"2026-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison of the in-plane shear response of a FRP obtained by biaxial tension-compression test and standard methods 双轴拉压试验与标准方法测得FRP的面内剪切响应比较

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-03-22 Epub Date: 2026-01-06 DOI: 10.1016/j.compscitech.2026.111519

M.C. Serna Moreno, S. Horta Muñoz, J. García-Delgado

Standard methods for determining the intralaminar shear behaviour of unidirectional fibre-reinforced polymers (FRPs) provide accurate measurements of shear stiffness along the principal material directions. However, the shear stress-strain relationship often varies across methodologies, leading to significant differences in the onset of non-linearity and the estimated shear strength. In this work, the Digital Image Correlation technique is used to assess the full strain fields obtained from V-notched rail, Iosipescu and uniaxial tensile standards, together with the tension-compression biaxial test (TC test), recently introduced as a novel technique for determining the in-plane shear response. The strain state specific to each case is examined, as they are closely related to the differences observed in their non-linear shear responses. This study presents, for the first time in the literature, a comprehensive comparison of angular changes, rigid-body motion and fibre reorientation obtained with different shear test methodologies. The main challenge lies in quantitatively describing the deviation from ideal strain states, i.e. simple and pure shear strain fields, as large shear strains during the non-linear shear response can significantly alter the initial geometry of the specimen. As a new outcome, shear and longitudinal strains along the updated fibre directions are calculated for analysing which strain component is predominant throughout the experiments. This comparative information is intended to support decision-making when selecting the most appropriate methodology. If only the shear modulus in the principal directions is of interest, the simpler and more cost-effective uniaxial tensile test is recommended first, followed by V-notched type methods. For a more detailed characterization of the non-linear shear behaviour, the additional time and expense of TC tests may be justified.

测定单向纤维增强聚合物（frp）层内剪切行为的标准方法提供沿主要材料方向的剪切刚度的精确测量。然而，不同方法的剪切应力-应变关系往往不同，导致非线性的开始和估计的抗剪强度有显著差异。在这项工作中，使用数字图像相关技术来评估从v形缺口轨，Iosipescu和单轴拉伸标准中获得的全应变场，以及最近作为确定面内剪切响应的新技术引入的拉压双轴试验（TC试验）。对每种情况的应变状态进行了检查，因为它们与在非线性剪切响应中观察到的差异密切相关。本研究首次在文献中全面比较了不同剪切试验方法获得的角度变化、刚体运动和纤维重定向。主要的挑战在于定量描述与理想应变状态的偏差，即简单和纯剪切应变场，因为非线性剪切响应期间的大剪切应变会显著改变试样的初始几何形状。作为一种新的结果，沿着更新的纤维方向计算剪切和纵向应变，以分析在整个实验中哪种应变分量占主导地位。这种比较信息的目的是在选择最适当的方法时支持决策。如果只对主方向的剪切模量感兴趣，则建议先进行更简单、更经济的单轴拉伸试验，然后采用v形缺口型方法。为了更详细地描述非线性剪切行为，TC试验的额外时间和费用可能是合理的。

{"title":"Comparison of the in-plane shear response of a FRP obtained by biaxial tension-compression test and standard methods","authors":"M.C. Serna Moreno, S. Horta Muñoz, J. García-Delgado","doi":"10.1016/j.compscitech.2026.111519","DOIUrl":"10.1016/j.compscitech.2026.111519","url":null,"abstract":"<div><div>Standard methods for determining the intralaminar shear behaviour of unidirectional fibre-reinforced polymers (FRPs) provide accurate measurements of shear stiffness along the principal material directions. However, the shear stress-strain relationship often varies across methodologies, leading to significant differences in the onset of non-linearity and the estimated shear strength. In this work, the Digital Image Correlation technique is used to assess the full strain fields obtained from V-notched rail, Iosipescu and uniaxial tensile standards, together with the tension-compression biaxial test (TC test), recently introduced as a novel technique for determining the in-plane shear response. The strain state specific to each case is examined, as they are closely related to the differences observed in their non-linear shear responses. This study presents, for the first time in the literature, a comprehensive comparison of angular changes, rigid-body motion and fibre reorientation obtained with different shear test methodologies. The main challenge lies in quantitatively describing the deviation from ideal strain states, i.e. simple and pure shear strain fields, as large shear strains during the non-linear shear response can significantly alter the initial geometry of the specimen. As a new outcome, shear and longitudinal strains along the updated fibre directions are calculated for analysing which strain component is predominant throughout the experiments. This comparative information is intended to support decision-making when selecting the most appropriate methodology. If only the shear modulus in the principal directions is of interest, the simpler and more cost-effective uniaxial tensile test is recommended first, followed by V-notched type methods. For a more detailed characterization of the non-linear shear behaviour, the additional time and expense of TC tests may be justified.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"276 ","pages":"Article 111519"},"PeriodicalIF":9.8,"publicationDate":"2026-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantitative analysis of interface crack propagation along a single carbon fiber under off-axis cyclic loading using nanoscopic three-dimensional imaging 用纳米三维成像技术定量分析单碳纤维在离轴循环载荷下的界面裂纹扩展

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-03-22 Epub Date: 2026-01-08 DOI: 10.1016/j.compscitech.2026.111522

Naoya Matsuda , Kosuke Takahashi

Understanding the fatigue behavior of carbon fiber reinforced plastics (CFRP) requires clarifying the mechanism of interfacial crack initiation and propagation along individual carbon fibers. In this study, in-situ synchrotron radiation X-ray nano-computed tomography (nano-CT) was employed to visualize three-dimensional interfacial crack propagation between a single carbon fiber and an epoxy matrix under cyclic loading. Dumbbell-shaped specimens containing a transversely embedded carbon fiber were subjected to cyclic loading at maximum stresses of 50 and 60 MPa, both below the yield stress (70 MPa). Crack propagation was captured after specific numbers of cycles using a custom-designed piezo-actuated fatigue testing system installed at beamline BL20XU of the SPring-8 synchrotron facility. The reconstructed nano-CT images revealed that interfacial cracks initiated from the fiber ends and propagated several micrometers along the interface. The measured crack propagation rate decreased with increasing cycle number and eventually indicated a transition to non-propagating cracks. The corresponding stress intensity factor range calculated at the crack tips was lower than the experimentally determined threshold value for the bulk epoxy matrix obtained using compact tension specimens. This comparison confirms that the interfacial crack along a single carbon fiber is too small to fracture the surrounding epoxy matrix, suggesting that fatigue behavior is governed by the local fracture toughness of the epoxy matrix. These findings demonstrate, for the first time, direct three-dimensional visualization of an interfacial crack along a single carbon fiber under elastic cyclic loading, providing new insights into the micro-mechanical origins of fatigue resistance in CFRP materials.

要理解碳纤维增强塑料（CFRP）的疲劳行为，就需要明确单个碳纤维的界面裂纹萌生和扩展机制。在这项研究中，采用原位同步辐射x射线纳米计算机断层扫描（纳米ct）来观察循环载荷下单个碳纤维与环氧基之间的三维界面裂纹扩展。含碳纤维横向嵌套的哑铃形试件在最大应力50和60 MPa下进行循环加载，均低于屈服应力（70 MPa）。使用安装在SPring-8同步加速器设备的光束线BL20XU上的定制压电驱动疲劳测试系统，在特定次数的循环后捕获裂纹扩展。重建的纳米ct图像显示，界面裂纹从纤维端开始，沿界面扩展数微米。裂纹扩展速率随循环次数的增加而减小，最终向非扩展裂纹过渡。在裂纹尖端处计算的相应应力强度因子范围低于用紧致拉伸试样获得的大块环氧基体的实验确定的阈值。这一对比证实，沿单个碳纤维的界面裂纹太小，无法破坏周围的环氧基体，这表明疲劳行为受环氧基体局部断裂韧性的控制。这些发现首次证明了弹性循环载荷下单个碳纤维界面裂纹的直接三维可视化，为CFRP材料抗疲劳的微观力学根源提供了新的见解。

{"title":"Quantitative analysis of interface crack propagation along a single carbon fiber under off-axis cyclic loading using nanoscopic three-dimensional imaging","authors":"Naoya Matsuda , Kosuke Takahashi","doi":"10.1016/j.compscitech.2026.111522","DOIUrl":"10.1016/j.compscitech.2026.111522","url":null,"abstract":"<div><div>Understanding the fatigue behavior of carbon fiber reinforced plastics (CFRP) requires clarifying the mechanism of interfacial crack initiation and propagation along individual carbon fibers. In this study, in-situ synchrotron radiation X-ray nano-computed tomography (nano-CT) was employed to visualize three-dimensional interfacial crack propagation between a single carbon fiber and an epoxy matrix under cyclic loading. Dumbbell-shaped specimens containing a transversely embedded carbon fiber were subjected to cyclic loading at maximum stresses of 50 and 60 MPa, both below the yield stress (70 MPa). Crack propagation was captured after specific numbers of cycles using a custom-designed piezo-actuated fatigue testing system installed at beamline BL20XU of the SPring-8 synchrotron facility. The reconstructed nano-CT images revealed that interfacial cracks initiated from the fiber ends and propagated several micrometers along the interface. The measured crack propagation rate decreased with increasing cycle number and eventually indicated a transition to non-propagating cracks. The corresponding stress intensity factor range calculated at the crack tips was lower than the experimentally determined threshold value for the bulk epoxy matrix obtained using compact tension specimens. This comparison confirms that the interfacial crack along a single carbon fiber is too small to fracture the surrounding epoxy matrix, suggesting that fatigue behavior is governed by the local fracture toughness of the epoxy matrix. These findings demonstrate, for the first time, direct three-dimensional visualization of an interfacial crack along a single carbon fiber under elastic cyclic loading, providing new insights into the micro-mechanical origins of fatigue resistance in CFRP materials.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"276 ","pages":"Article 111522"},"PeriodicalIF":9.8,"publicationDate":"2026-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Meso-scale fracture simulation of high particle-filled composites using the numerical manifold method 基于数值流形方法的高颗粒填充复合材料细观断裂模拟

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-03-22 Epub Date: 2026-01-07 DOI: 10.1016/j.compscitech.2025.111515

Liuchen Shu , Rui Yue , Xuezhen Zhai , Youjun Ning , Ge Kang

High particle-filled composites (HPFCs) are widely used in protective structures, aerospace components, and energetic materials due to their high density, superior mechanical properties, and multifunctionality. However, their complex meso-structures give rise to highly nonlinear and multi-scale coupled deformation and fracture behaviors under tensile loading. In this study, crack-insertion and element-deletion algorithms were developed within the framework of the Numerical Manifold Method (NMM) to simulate the meso-scale fracture processes of HPFCs. Representative volume elements (RVEs) were constructed with distinct constitutive models for particles, matrix, and interfaces to investigate the effects of particle filling ratio, temperature, and strain rate on the mechanical response. Results indicate that low filling ratio models exhibit multiple crack bands, whereas high filling ratio models develop a single dominant crack band. Increasing filling ratio enhances the equivalent elastic modulus but reduces failure strain, with tensile strength remaining nearly constant. Temperature rise softens the matrix, shifts crack initiation toward the bottom, and suppresses transgranular fracture of particles. At high strain rates, fracture evolves into multiple crack bands, with increasing modulus and decreasing failure strain. Comparison with experimental data at 25 °C, strain rate of

0.67 s^{- 1}

, and particle volume fraction of 90.102% shows simulation errors below 2% for both modulus and strength, confirming the accuracy of the method. Overall, the proposed NMM-based approach effectively captures critical fracture features such as crack-band evolution and interfacial debonding, and provides accurate predictions of HPFCs mechanical responses under varying service conditions, offering valuable insights for material design and optimization.

高颗粒填充复合材料（hpfc）因其高密度、优异的机械性能和多功能性而广泛应用于防护结构、航空航天部件和高能材料中。然而，它们复杂的细观结构导致了在拉伸载荷下高度非线性和多尺度耦合的变形和断裂行为。本文在数值流形法（NMM）的框架下，开发了裂纹插入和单元删除算法来模拟高氟碳纤维的细观尺度断裂过程。构建具有代表性的体积单元（RVEs），分别建立颗粒、基体和界面的本构模型，研究颗粒填充率、温度和应变速率对力学响应的影响。结果表明：低填充率模型存在多条裂缝带，而高填充率模型存在一条优势裂缝带。增大填充比，等效弹性模量增大，破坏应变减小，抗拉强度基本保持不变。升温软化了基体，使裂纹萌生向底部移动，抑制了颗粒的穿晶断裂。在高应变速率下，断裂演化为多个裂纹带，模量增大，破坏应变减小。与25℃、应变率为0.67s−1、颗粒体积分数为90.102%时的实验数据相比，模量和强度的模拟误差均小于2%，验证了该方法的准确性。总体而言，该方法有效捕获了裂纹带演化和界面脱粘等关键断裂特征，并提供了不同使用条件下HPFCs力学响应的准确预测，为材料设计和优化提供了有价值的见解。

{"title":"Meso-scale fracture simulation of high particle-filled composites using the numerical manifold method","authors":"Liuchen Shu , Rui Yue , Xuezhen Zhai , Youjun Ning , Ge Kang","doi":"10.1016/j.compscitech.2025.111515","DOIUrl":"10.1016/j.compscitech.2025.111515","url":null,"abstract":"<div><div>High particle-filled composites (HPFCs) are widely used in protective structures, aerospace components, and energetic materials due to their high density, superior mechanical properties, and multifunctionality. However, their complex meso-structures give rise to highly nonlinear and multi-scale coupled deformation and fracture behaviors under tensile loading. In this study, crack-insertion and element-deletion algorithms were developed within the framework of the Numerical Manifold Method (NMM) to simulate the meso-scale fracture processes of HPFCs. Representative volume elements (RVEs) were constructed with distinct constitutive models for particles, matrix, and interfaces to investigate the effects of particle filling ratio, temperature, and strain rate on the mechanical response. Results indicate that low filling ratio models exhibit multiple crack bands, whereas high filling ratio models develop a single dominant crack band. Increasing filling ratio enhances the equivalent elastic modulus but reduces failure strain, with tensile strength remaining nearly constant. Temperature rise softens the matrix, shifts crack initiation toward the bottom, and suppresses transgranular fracture of particles. At high strain rates, fracture evolves into multiple crack bands, with increasing modulus and decreasing failure strain. Comparison with experimental data at 25 °C, strain rate of <span><math><mrow><mn>0</mn><mo>.</mo><mn>67</mn><mspace></mspace><msup><mrow><mtext>s</mtext></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></mrow></math></span>, and particle volume fraction of 90.102% shows simulation errors below 2% for both modulus and strength, confirming the accuracy of the method. Overall, the proposed NMM-based approach effectively captures critical fracture features such as crack-band evolution and interfacial debonding, and provides accurate predictions of HPFCs mechanical responses under varying service conditions, offering valuable insights for material design and optimization.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"276 ","pages":"Article 111515"},"PeriodicalIF":9.8,"publicationDate":"2026-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrigendum to “Quantification of damage expansion influence on frequency response function of plate for structural health monitoring with integral differential” [Compos. Sci. Technol. 244 (2023) 110298] “用积分微分法对结构健康监测中损伤扩展对板频响函数影响的量化”的勘误表[汇编]。科学。科技. 244 (2023)110298]

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-03-01 Epub Date: 2025-12-24 DOI: 10.1016/j.compscitech.2025.111315

Tao Wen , Fumio Narita , Hiroki Kurita , Yu Jia , Yu Shi

引用次数: 0

Hydrothermal aging effects on mechanical degradation of short fiber reinforced polyamide composites 水热老化对短纤维增强聚酰胺复合材料力学降解的影响

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-03-01 Epub Date: 2025-12-23 DOI: 10.1016/j.compscitech.2025.111496

Hong-Bo Huang , Zheng-Ming Huang , Jie Zhi , Vincent Beng Chye Tan , Yong-Ping Wan , Yan Li

Hydrothermal aging of the polymer matrix can significantly impact the long-term performance of short fiber reinforced thermoplastic composites (SFRTs), yet the extent of this influence remains unclear due to complex contributing factors. In this study, thermostatic immersion aging followed by tensile test is performed for polyamide (PA) and its composites reinforced with short carbon fiber and glass fiber, with variations in fiber content, geometric characteristics, and aging temperature. Despite differing diffusion rates and saturation levels among materials, all systems follow Fickian diffusion kinetics. To model the modulus degradation due to aging, a two-step homogenization (TSH) framework is developed by sequentially applying the Bridging Model and a hybrid method. The aged modulus is estimated by replacing the pristine matrix modulus with its moisture-degraded counterpart. However, predicting strength is more challenging due to the complex interplay between matrix plasticization and pore growth, as revealed by comparative CT imaging and tensile test results. Therefore, a Random Forest regression model is trained using 181 data points to predict the elastic modulus, tensile strength, and failure strain of SFRTs based on six input features. All predictions achieved R² values above 0.96 on the testing dataset, confirming the adequacy of the selected input features. Regarding feature importance, SHAP analysis identifies fiber volume fraction, moisture content, and fiber-to-matrix modulus ratio as the most influential variables. The minimal effect of aging temperature further supports the TSH assumption that moisture-driven changes in the matrix govern the mechanical degradation behavior of SFRTs in this system.

聚合物基体的水热老化会显著影响短纤维增强热塑性复合材料（SFRTs）的长期性能，但由于影响因素复杂，这种影响的程度尚不清楚。本研究对短碳纤维和玻璃纤维增强聚酰胺（PA）及其复合材料在纤维含量、几何特性和老化温度的变化下进行了恒温浸渍老化和拉伸试验。尽管材料之间的扩散速率和饱和水平不同，但所有系统都遵循菲克扩散动力学。为了模拟由于老化引起的模量退化，通过依次应用桥接模型和混合方法建立了两步均匀化（TSH）框架。老化模量是通过将原始矩阵模量替换为其湿退化对应物来估计的。然而，正如对比CT成像和拉伸测试结果所显示的那样，由于基质塑化和孔隙生长之间复杂的相互作用，预测强度更具挑战性。因此，使用181个数据点训练随机森林回归模型，基于6个输入特征预测sfrt的弹性模量、抗拉强度和破坏应变。在测试数据集上，所有预测的R2值都达到了0.96以上，证实了所选输入特征的充分性。在特征重要性方面，SHAP分析确定纤维体积分数、含水率和纤维-基质模量比是影响最大的变量。老化温度的最小影响进一步支持了TSH的假设，即基质中水分驱动的变化控制了该体系中sfrt的机械降解行为。

{"title":"Hydrothermal aging effects on mechanical degradation of short fiber reinforced polyamide composites","authors":"Hong-Bo Huang , Zheng-Ming Huang , Jie Zhi , Vincent Beng Chye Tan , Yong-Ping Wan , Yan Li","doi":"10.1016/j.compscitech.2025.111496","DOIUrl":"10.1016/j.compscitech.2025.111496","url":null,"abstract":"<div><div>Hydrothermal aging of the polymer matrix can significantly impact the long-term performance of short fiber reinforced thermoplastic composites (SFRTs), yet the extent of this influence remains unclear due to complex contributing factors. In this study, thermostatic immersion aging followed by tensile test is performed for polyamide (PA) and its composites reinforced with short carbon fiber and glass fiber, with variations in fiber content, geometric characteristics, and aging temperature. Despite differing diffusion rates and saturation levels among materials, all systems follow Fickian diffusion kinetics. To model the modulus degradation due to aging, a two-step homogenization (TSH) framework is developed by sequentially applying the Bridging Model and a hybrid method. The aged modulus is estimated by replacing the pristine matrix modulus with its moisture-degraded counterpart. However, predicting strength is more challenging due to the complex interplay between matrix plasticization and pore growth, as revealed by comparative CT imaging and tensile test results. Therefore, a Random Forest regression model is trained using 181 data points to predict the elastic modulus, tensile strength, and failure strain of SFRTs based on six input features. All predictions achieved R<sup>2</sup> values above 0.96 on the testing dataset, confirming the adequacy of the selected input features. Regarding feature importance, SHAP analysis identifies fiber volume fraction, moisture content, and fiber-to-matrix modulus ratio as the most influential variables. The minimal effect of aging temperature further supports the TSH assumption that moisture-driven changes in the matrix govern the mechanical degradation behavior of SFRTs in this system.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"275 ","pages":"Article 111496"},"PeriodicalIF":9.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145837052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel thermo-viscoplastic characterization method for glass fiber-reinforced thermoplastics 玻璃纤维增强热塑性塑料热粘塑性表征新方法

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-03-01 Epub Date: 2025-12-19 DOI: 10.1016/j.compscitech.2025.111492

Josephine Faddoul , Pierre Rahme , Dominique Guines , Lionel Leotoing

This work develops a thermo-viscoplastic characterization framework for a glass-fiber-reinforced polypropylene (GFPP) composite for forming applications. Uniaxial tensile tests were conducted at three temperatures (20, 70, and 120 °C) and three strain rates to evaluate anisotropic and temperature-dependent behavior. In-plane biaxial tests on cruciform specimens were then performed to reach higher equivalent strains and reproduce multiaxial deformation paths. An elasto-viscoplastic constitutive model based on the modified G'Sell–Jonas formulation was calibrated through inverse finite-element identification using experimental forces and DIC strain fields. The model reproduced the deformation response with identification errors of 2.5–7.6 % across the temperature range. Temperature-dependent parameters exhibited an approximately linear reduction of 60–80 % with increasing temperature. The resulting model provides a consistent input for thermoforming simulations of GFPP components.

本研究开发了一种用于成型应用的玻璃纤维增强聚丙烯（ggfpp）复合材料的热粘塑性表征框架。在三种温度（20、70和120°C）和三种应变速率下进行单轴拉伸试验，以评估各向异性和温度依赖行为。然后对十字形试件进行平面内双轴试验，以获得更高的等效应变并再现多轴变形路径。基于修正G 'Sell-Jonas公式的弹粘塑性本构模型，通过实验力和DIC应变场的反有限元识别进行了标定。该模型在整个温度范围内再现了变形响应，识别误差为2.5% ~ 7.6%。随着温度的升高，温度相关参数呈现出60 - 80%的近似线性降低。所得模型为GFPP部件的热成型模拟提供了一致的输入。

引用次数: 0

Trilaminar impedance-gradient design of lightweight silicone aerogel composites via dielectric-tunable fiber preforms for broadband microwave absorption 基于介电可调光纤预制体的轻质硅气凝胶复合材料的三层阻抗梯度设计

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-03-01 Epub Date: 2025-12-11 DOI: 10.1016/j.compscitech.2025.111486

Xueyang Wang , Hao Tian , Xuanye Tian , Yi Luo , Bo Niu , Kaili Zhang , Zhe Su , Donghui Long

Electromagnetic wave (EMW) absorbers are crucial for advanced stealth and electromagnetic protection, yet achieving broadband microwave absorption in single-layer configurations remain challenge. Herein, a trilaminar impedance gradient structure (IGS) consisting of matching layer, absorbing layer and reflecting layer has been introduced into lightweight silicone aerogel composites for broadband microwave absorption. Conductive carbon nanofibers are deliberately sprayed onto thin quartz fiber felts, endowing composites with tunable and designable dielectric properties. These composites exhibit a wide permittivity range (

ε^{'}

from 2.2 to 14.5,

ε^{″}

from 0.13 to 13.3), achieving a transition of EMW attenuation from weak to strong. By regulating the permittivity of each composite layers, the composite with IGS have optimized impedance matching and enhanced attenuation capacity, achieving an effective absorption bandwidth (EAB) of 12.7 GHz, covering the frequency range of 5.3–18 GHz. Moreover, the lightweight composites exhibits good tension strength of 12.1 MPa and low thermal conductivity of 0.045 W m⁻¹ K⁻¹, which satisfies the multi-functional requirements for lightweight stealth and thermal insulation in practical engineering applications.

电磁波（EMW）吸收器对于先进的隐身和电磁保护至关重要，但在单层结构中实现宽带微波吸收仍然是一个挑战。本文将由匹配层、吸收层和反射层组成的三层阻抗梯度结构（IGS）引入到用于宽带微波吸收的轻质硅气凝胶复合材料中。导电碳纳米纤维被故意喷涂到薄石英纤维毡上，赋予复合材料可调谐和可设计的介电性能。这些复合材料具有较宽的介电常数范围（ε′为2.2 ~ 14.5，ε″为0.13 ~ 13.3），实现了EMW衰减由弱到强的转变。通过调节各层的介电常数，IGS复合材料的阻抗匹配得到优化，衰减能力增强，有效吸收带宽（EAB）达到12.7 GHz，覆盖5.3-18 GHz的频率范围。轻质复合材料具有良好的抗拉强度（12.1 MPa）和低导热系数（0.045 W m−1 K−1），满足工程实际中对轻量化隐身和隔热的多功能要求。

{"title":"Trilaminar impedance-gradient design of lightweight silicone aerogel composites via dielectric-tunable fiber preforms for broadband microwave absorption","authors":"Xueyang Wang , Hao Tian , Xuanye Tian , Yi Luo , Bo Niu , Kaili Zhang , Zhe Su , Donghui Long","doi":"10.1016/j.compscitech.2025.111486","DOIUrl":"10.1016/j.compscitech.2025.111486","url":null,"abstract":"<div><div>Electromagnetic wave (EMW) absorbers are crucial for advanced stealth and electromagnetic protection, yet achieving broadband microwave absorption in single-layer configurations remain challenge. Herein, a trilaminar impedance gradient structure (IGS) consisting of matching layer, absorbing layer and reflecting layer has been introduced into lightweight silicone aerogel composites for broadband microwave absorption. Conductive carbon nanofibers are deliberately sprayed onto thin quartz fiber felts, endowing composites with tunable and designable dielectric properties. These composites exhibit a wide permittivity range (<span><math><mrow><msup><mi>ε</mi><mo>′</mo></msup></mrow></math></span> from 2.2 to 14.5, <span><math><mrow><msup><mi>ε</mi><mo>″</mo></msup></mrow></math></span> from 0.13 to 13.3), achieving a transition of EMW attenuation from weak to strong. By regulating the permittivity of each composite layers, the composite with IGS have optimized impedance matching and enhanced attenuation capacity, achieving an effective absorption bandwidth (EAB) of 12.7 GHz, covering the frequency range of 5.3–18 GHz. Moreover, the lightweight composites exhibits good tension strength of 12.1 MPa and low thermal conductivity of 0.045 W m<sup>−1</sup> K<sup>−1</sup>, which satisfies the multi-functional requirements for lightweight stealth and thermal insulation in practical engineering applications.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"275 ","pages":"Article 111486"},"PeriodicalIF":9.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0