Composites Science and Technology最新文献

{"title":"A novel algorithm for generating RVEs of continuous fiber reinforced composites with high fiber volume fraction","authors":"Wujie Chen ,&nbsp;Kunkun Fu ,&nbsp;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}

{"title":"The electrical resistivity of CB–polymer piezoelectric hybrid nanocomposites: Experimental and micromechanical studies","authors":"Masoumeh Khamehchi ,&nbsp;Ziwen Zhao ,&nbsp;Mohammad Javad Mahmoodi ,&nbsp;Zhenjin Wang ,&nbsp;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 &lt;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}

{"title":"Integrated capacitive-resistive multiplexing technology for achieving pressure-strain decoupling in dual-parameter flexible sensor","authors":"Shixue He ,&nbsp;Jian Wu ,&nbsp;Qiandiao Wei ,&nbsp;Zhihao Chen ,&nbsp;Shouyao Liu ,&nbsp;Benlong Su ,&nbsp;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}

{"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,&nbsp;S. Horta Muñoz,&nbsp;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}

{"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 ,&nbsp;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}

{"title":"Meso-scale fracture simulation of high particle-filled composites using the numerical manifold method","authors":"Liuchen Shu ,&nbsp;Rui Yue ,&nbsp;Xuezhen Zhai ,&nbsp;Youjun Ning ,&nbsp;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}

{"title":"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]","authors":"Tao Wen ,&nbsp;Fumio Narita ,&nbsp;Hiroki Kurita ,&nbsp;Yu Jia ,&nbsp;Yu Shi","doi":"10.1016/j.compscitech.2025.111315","DOIUrl":"10.1016/j.compscitech.2025.111315","url":null,"abstract":"","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"275 ","pages":"Article 111315"},"PeriodicalIF":9.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145938357","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}

{"title":"Hydrothermal aging effects on mechanical degradation of short fiber reinforced polyamide composites","authors":"Hong-Bo Huang ,&nbsp;Zheng-Ming Huang ,&nbsp;Jie Zhi ,&nbsp;Vincent Beng Chye Tan ,&nbsp;Yong-Ping Wan ,&nbsp;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 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.</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}

{"title":"Novel thermo-viscoplastic characterization method for glass fiber-reinforced thermoplastics","authors":"Josephine Faddoul ,&nbsp;Pierre Rahme ,&nbsp;Dominique Guines ,&nbsp;Lionel Leotoing","doi":"10.1016/j.compscitech.2025.111492","DOIUrl":"10.1016/j.compscitech.2025.111492","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"275 ","pages":"Article 111492"},"PeriodicalIF":9.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145837053","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}

{"title":"Trilaminar impedance-gradient design of lightweight silicone aerogel composites via dielectric-tunable fiber preforms for broadband microwave absorption","authors":"Xueyang Wang ,&nbsp;Hao Tian ,&nbsp;Xuanye Tian ,&nbsp;Yi Luo ,&nbsp;Bo Niu ,&nbsp;Kaili Zhang ,&nbsp;Zhe Su ,&nbsp;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⁻¹ K⁻¹, 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}