Composite Structures最新文献_第2页

Mechanically reinforced epoxidized natural rubber composites with Regulated interfacial structure and aging resistance by modified lignin for solar thermoelectric conversion 用改性木质素制备界面结构可调节、耐老化的机械增强环氧化天然橡胶复合材料

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-11-01 Epub Date: 2026-10-27 DOI: 10.1016/j.compstruct.2026.121053

Zhiju Chen, Yunlong Li, Yuhao Su, Quan Wang, Shijie Wang, Taian Wang, Enqiu He

{"title":"Mechanically reinforced epoxidized natural rubber composites with Regulated interfacial structure and aging resistance by modified lignin for solar thermoelectric conversion","authors":"Zhiju Chen, Yunlong Li, Yuhao Su, Quan Wang, Shijie Wang, Taian Wang, Enqiu He","doi":"10.1016/j.compstruct.2026.121053","DOIUrl":"10.1016/j.compstruct.2026.121053","url":null,"abstract":"<div><div>Developing photothermal elastomers with integrated mechanical performance, aging resistance, and solar-energy conversion capability remains a challenge for outdoor applications. In this study, γ-aminopropyltriethoxysilane-modified lignin (LK550) was introduced into epoxidized natural rubber/carbon black (ENR/CB) composites to regulate the filler-matrix interfacial structure. The structural and macroscopic properties of the composites were investigated by combining experimental characterization with molecular dynamics (MD) simulations. Fourier transform infrared spectroscopy, scanning electron microscopy and energy-dispersive X-ray spectroscopy supported the modification and intimate filler-matrix contact. Results showed that 1.5-LK550 exhibited the most favorable overall performance balance, with 23.42 % higher tensile strength and 71.51 % lower wear-scar depth compared with ENR/CB. After aging at 100 °C for 120 h, tensile strength retention increased from 32.09 % to 43.99 %. Under near-infrared irradiation, 1.5-LK550 exhibited a surface temperature 67.6 °C higher than that of ENR/CB. In this formulation, LK550 facilitated stress transfer and retarded the thermo-oxidative aging of the ENR network by strengthening lignin-matrix interactions. MD simulations revealed strengthened interfacial interactions, restricted segmental mobility, and enhanced heat-transfer behavior induced by LK550. Finally, 1.5-LK550 was integrated as a flexible photothermal absorber into a layered thermoelectric conversion structure, delivering reproducible 400 mV output and demonstrating feasibility for solar thermoelectric power generation.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"400 ","pages":"Article 121053"},"PeriodicalIF":7.8,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149350599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Effect of low-velocity impact on the fatigue behavior of unidirectional-mat flax fiber reinforced/epoxy laminates and comparison with glass/epoxy laminates 低速冲击对单向垫层亚麻纤维增强/环氧复合材料疲劳性能的影响及与玻璃/环氧复合材料的比较

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-11-01 Epub Date: 2026-10-25 DOI: 10.1016/j.compstruct.2026.121036

S.E.K. Rouphael, F. Touchard, T.-Q. Truong-Hoang, G. Lebrun

{"title":"Effect of low-velocity impact on the fatigue behavior of unidirectional-mat flax fiber reinforced/epoxy laminates and comparison with glass/epoxy laminates","authors":"S.E.K. Rouphael, F. Touchard, T.-Q. Truong-Hoang, G. Lebrun","doi":"10.1016/j.compstruct.2026.121036","DOIUrl":"10.1016/j.compstruct.2026.121036","url":null,"abstract":"<div><div>This study investigates a biocomposite reinforced with unidirectional flax yarns bound by short flax fibers (UD-mat). The mechanical performance of flax/epoxy laminates under the pre- and post-impact fatigue behavior, was assessed and compared to their glass/epoxy counterparts. Two stacking sequences were considered: unidirectional [0]<sub>8</sub> and cross-ply [0/90]<sub>2S</sub>. Before impact, UD-mat flax laminates exhibited better fatigue resistance compared to glass fiber laminates, with the [0]₈ configuration demonstrating a longer fatigue life than the [0/90]<sub>2S</sub> sequence. A 5 J impact reduced the tensile strength of the flax/epoxy laminates by 25% for the [0]₈ and 28% for the [0/90]<sub>2S</sub> laminates, while glass/epoxy laminates were largely unaffected. As expected, the fatigue life of impacted flax composites was lower than that of non-impacted ones, regardless of the stacking sequence. However, their pre- and post-impact fatigue resistance of flax composites remained comparable. In contrast, the fatigue life of glass fiber composites was not affected by impact. A phenomenological fatigue model was successfully used to predict the fatigue life of pre- and post-impact laminates. Additionally, interrupted fatigue tests coupled with microtomography analyses provided insights into the damage mechanisms involved. Notably, cross-ply flax laminates retained their tensile properties even after one million fatigue cycles, demonstrating their promising durability.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"400 ","pages":"Article 121036"},"PeriodicalIF":7.8,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149364834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Nonlinear free vibration analysis of curved fiber composite trapezoidal laminates 弯曲纤维复合材料梯形层合板的非线性自由振动分析

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-11-01 Epub Date: 2026-10-26 DOI: 10.1016/j.compstruct.2026.120992

Shuai Zhang, Yao Yan, Siyuan Wu, Rui Zou, Binqi Chen

{"title":"Nonlinear free vibration analysis of curved fiber composite trapezoidal laminates","authors":"Shuai Zhang, Yao Yan, Siyuan Wu, Rui Zou, Binqi Chen","doi":"10.1016/j.compstruct.2026.120992","DOIUrl":"10.1016/j.compstruct.2026.120992","url":null,"abstract":"<div><div>This paper investigates the geometrically nonlinear free vibration behavior of curved fiber composite laminates with trapezoidal planforms to enhance structural performance. Based on the Classical Laminated Plate Theory (CLPT) and von Kármán’s large deflection assumptions, a unified computational framework is established by integrating geometric coordinate transformation with the Differential Quadrature Method (DQM) and the Harmonic Balance Method (HBM). This approach effectively maps the irregular physical trapezoidal domain onto a regular computational domain, enabling efficient and accurate solutions for strongly nonlinear problems. The convergence and accuracy of the proposed method are rigorously verified against independent p-version Finite Element Method (FEM) solutions, demonstrating excellent agreement across rectangular and trapezoidal configurations, even under large amplitude conditions. Extensive parametric studies reveal that the nonlinear dynamic response is intrinsically governed by the geometric taper ratio. Specifically, highly tapered trapezoidal plates exhibit significantly stronger hardening nonlinearity compared to rectangular ones, attributed to enhanced membrane stretching effects at the converging boundaries. Furthermore, full-field analyses confirm the superiority of curved fiber designs over traditional straight fiber configurations. It is demonstrated that the nonlinear frequency response can be passively tailored by optimizing the curved fiber orientation angles, offering new design flexibility for advanced aerospace structures.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"400 ","pages":"Article 120992"},"PeriodicalIF":7.8,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149350964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Variational physics-informed extreme learning machine for the analysis of laminated nanoshells 层合纳米壳分析的变分物理极值学习机

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-11-01 Epub Date: 2026-10-23 DOI: 10.1016/j.compstruct.2026.121016

C.A. Yan, N. Fantuzzi, R. Vescovini, R. Luciano

{"title":"Variational physics-informed extreme learning machine for the analysis of laminated nanoshells","authors":"C.A. Yan, N. Fantuzzi, R. Vescovini, R. Luciano","doi":"10.1016/j.compstruct.2026.121016","DOIUrl":"10.1016/j.compstruct.2026.121016","url":null,"abstract":"<div><div>Laminated nanoshells are widely employed in advanced micro- and nanoscale systems for their excellent mechanical properties. However, their microstructural behavior remains still not completely understood, largely due to the lack of general and efficient analysis tools. Analytical solutions are limited to simple configurations, while finite element methods require high-continuity approximations, increasing computational demand and implementation difficulty. This work proposes the Variational Physics-Informed Extreme Learning Machine (VPIELM), a novel meshless method that combines the universal approximation capability of Physics-Informed Neural Networks with the training efficiency of Extreme Learning Machines. Unlike conventional Physics-Informed Extreme Learning Machines (PIELMs), VPIELM is formulated in weak form, enabling natural boundary conditions to be satisfied a priori. Essential boundary conditions are enforced via boundary-conforming functions incorporated into the network ansatz, eliminating penalty parameters and improving numerical robustness. The VPIELM reduces the standard deviation of frequency predictions associated to random training initializations by 1–2 orders of magnitude and the average relative error of higher modes by approximately one order of magnitude. This improved stability and accuracy is exploited to investigate the effects of laminate layup, shell geometry, and boundary conditions on the vibration response of composite nanoshells. Overall, VPIELM provides a versatile tool for composite nanostructures analysis.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"400 ","pages":"Article 121016"},"PeriodicalIF":7.8,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149350965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Data driven prediction model of effective thermal conductivity of random composites 随机复合材料有效导热系数的数据驱动预测模型

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-11-01 Epub Date: 2026-10-28 DOI: 10.1016/j.compstruct.2026.121031

Yao Luo, Yixiang Liu, Yuxiang He, Xiangyu Li

{"title":"Data driven prediction model of effective thermal conductivity of random composites","authors":"Yao Luo, Yixiang Liu, Yuxiang He, Xiangyu Li","doi":"10.1016/j.compstruct.2026.121031","DOIUrl":"10.1016/j.compstruct.2026.121031","url":null,"abstract":"<div><div>Polymer composites with thermally conductive fillers are widely used as thermal management materials in electronic devices. Due to the complexity and randomness of composite microstructures, accurately predicting their effective thermal conductivities (ETCs) remains a significant challenge. Even for composites with the same statistical parameters, their thermal conductivities may randomly fluctuate within a certain range. By virtue of the sampling theorem and data-driven methods, this study statistically determines the mean and bounds of ETC for composite materials with random microstructures. For particle-filled composites, the representative volume elements (RVEs) of microstructures are digitally reconstructed by the truncated Gaussian method, and their ETCs are systematically computed with the newly developed two-relaxation-time lattice Boltzmann method. For the random particle-filled composites and parameter combinations considered in this study, the ETCs of reconstructed RVEs can be characterized by normal distributions. In light of the properties of the normal distribution, the bounds at any confidence level for ETC of composite materials are constructed. An updated Maxwell model for ETC at different confidence level is explicitly obtained. The present models are validated by numerical and experimental data and exhibit good prediction capability for the material in question in this study.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"400 ","pages":"Article 121031"},"PeriodicalIF":7.8,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149351186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Electrospun ionogel actuator based on pennate muscle: Achieving fatigue-resistant contraction through an oriented fiber structure and dual ion–electron channels 基于pennate肌的电纺离子凝胶致动器：通过定向纤维结构和双离子电子通道实现抗疲劳收缩

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-11-01 Epub Date: 2026-10-26 DOI: 10.1016/j.compstruct.2026.121055

Junjie Yang, Jihong Sun, Tong Sha, Jintong Yao, Weilong Li, Longfei Wang

{"title":"Electrospun ionogel actuator based on pennate muscle: Achieving fatigue-resistant contraction through an oriented fiber structure and dual ion–electron channels","authors":"Junjie Yang, Jihong Sun, Tong Sha, Jintong Yao, Weilong Li, Longfei Wang","doi":"10.1016/j.compstruct.2026.121055","DOIUrl":"10.1016/j.compstruct.2026.121055","url":null,"abstract":"<div><div>Mammalian pennate muscles use obliquely arranged fibers for stable, fatigue-resistant movement by balancing force output, stress dispersion, and structural stability. Inspired by this, the paper presents an electrospun ionogel actuator (EIA) with an oriented fiber network and ionic-electronic conductive channels. This network enhances the gel matrix, improves stress transfer, and regulates ionic migration and stress distribution under an electric field. Carboxylated multi-walled carbon nanotubes (c-MWCNTs) create a conductive network for charge compensation and ionic transport. This pennate-muscle-like structure balances ionic transport efficiency and interface stability better than disordered or single-directional structures, reducing stress from local ionic shocks during repeated electrical stimulation. This improves electromechanical conversion, output force density, and cyclic stability. In multi-cycle tests, the optimally doped EIA exhibited an actuation force density fluctuation amplitude of 9.26 mN/g and a mean actuation force density of 40.49 mN/g over the measured cycles. The peak actuation force density difference was 35.23 %, and the response-speed attenuation rate was −5.7 %, demonstrating strong fatigue resistance and stable actuation dynamics.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"400 ","pages":"Article 121055"},"PeriodicalIF":7.8,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149350578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Quasi-static compressive behavior of Gyroid-based TC4/Zn98Mg2 interpenetrating-phase composites with a transversely deformable TC4 framework 具有横向变形TC4框架的gyroid基TC4/Zn98Mg2互穿相复合材料的准静态压缩行为

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-11-01 Epub Date: 2026-10-27 DOI: 10.1016/j.compstruct.2026.121061

Zhansheng Hou, Yuan Jin, Licheng Hua, Jianke Du, Haitao Fan

{"title":"Quasi-static compressive behavior of Gyroid-based TC4/Zn98Mg2 interpenetrating-phase composites with a transversely deformable TC4 framework","authors":"Zhansheng Hou, Yuan Jin, Licheng Hua, Jianke Du, Haitao Fan","doi":"10.1016/j.compstruct.2026.121061","DOIUrl":"10.1016/j.compstruct.2026.121061","url":null,"abstract":"<div><div>Architected metallic frameworks with auxetic deformation modes offer potential advantages for load-bearing fixation, but combining transverse contraction with sufficient compressive strength remains challenging. Here, Gyroid-based TC4/Zn98Mg2 interpenetrating-phase composites (IPCs) were fabricated by laser powder bed fusion and pressure-assisted melt infiltration. Quasi-static compression experiments evaluated the effect of wall thickness, while finite-element simulations examined Gyroid periodic length and level-set parameter. Among the three porous TC4 configurations, only the 0.5 mm wall-thickness group showed an apparent negative-Poisson’s-ratio tendency, predominantly in the post-peak regime after buckling and damage, rather than a confirmed elastic-stage auxetic response. Zn98Mg2 infiltration increased the peak crushing force to approximately 5470–6400 N, 3.5–7.4 times that of the corresponding porous structures, while maintaining post-peak load-bearing capacity. Over the common 1.5 mm evaluation interval, the IPCs exhibited mean crushing forces of 3.15–4.90 kN and crushing force efficiencies of 49.9%–89.6%. Within the tested configurations, Zn98Mg2 infiltration substantially increased specimen-level compressive load-bearing capacity, while energy-absorption performance remained configuration-dependent. The negative-Poisson’s-ratio tendency was observed only for the porous TC4 framework; Poisson’s ratio was not measured for the infiltrated IPCs, and no auxetic behavior is claimed for them. The findings provide a mechanical basis for further development of architected TC4/Zn98Mg2 IPCs.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"400 ","pages":"Article 121061"},"PeriodicalIF":7.8,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149350580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Effects of the 304/Ni wire ratio and interlayer structure on the quasi-static and dynamic mechanical properties of metal rubber 304/Ni丝比和层间结构对金属橡胶准静态和动态力学性能的影响

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-11-01 Epub Date: 2026-10-27 DOI: 10.1016/j.compstruct.2026.121049

Chen Shen, Kequan Tang, Yuedan Li, Wei Huang, Yangang Li, Zhiying Ren

{"title":"Effects of the 304/Ni wire ratio and interlayer structure on the quasi-static and dynamic mechanical properties of metal rubber","authors":"Chen Shen, Kequan Tang, Yuedan Li, Wei Huang, Yangang Li, Zhiying Ren","doi":"10.1016/j.compstruct.2026.121049","DOIUrl":"10.1016/j.compstruct.2026.121049","url":null,"abstract":"<div><div>Metal rubber is an elastic-porous damping material with good elastic recovery, energy dissipation, and impact resistance, but conventional single-wire metal rubber has limitations in stiffness–energy dissipation coordination. In this study, 304/Ni dissimilar-wire mixed metal rubber (DMMR) and 304/Ni dissimilar-wire interlayer metal rubber (DIMR) were designed and fabricated by combining the load-bearing advantage of 304 stainless steel wire with the energy-dissipation advantage of Ni wire, with single-wire metal rubber (SWMR) as the reference. Quasi-static and dynamic compression tests were conducted to investigate the effects of the 304/Ni/304 interlayer structure, 304/Ni wire ratio, relative density, and dynamic loading conditions on the mechanical properties of metal rubber. At the same Ni wire fraction of 50 %, DIMR-50 exhibited higher energy dissipation and loss factor than DMMR-50, with increases of 19.68 % and 37.90 %, respectively. Compared with SWMR-304, these two parameters increased by 25.11 % and 70.14 %, respectively. Increasing the Ni wire fraction enhanced dynamic energy dissipation and loss factor but reduced dynamic average stiffness, while increasing relative density improved load-bearing capacity, energy dissipation, and dynamic stiffness. These results demonstrate that 304/Ni wire-ratio regulation and 304/Ni/304 interlayer structural design effectively improve the stiffness–energy dissipation performance of metal rubber.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"400 ","pages":"Article 121049"},"PeriodicalIF":7.8,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149364830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Modeling and supersonic flutter analysis of axially moving three-phase composite varying thickness sandwich conical shells with a titanium fiber core 轴向运动钛纤维芯变厚度三相复合材料锥形壳的建模及超音速颤振分析

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-11-01 Epub Date: 2026-10-27 DOI: 10.1016/j.compstruct.2026.121051

Z.Q. Wang, W. Zhang, Y.F. Zhang, Y.Y. Chang

{"title":"Modeling and supersonic flutter analysis of axially moving three-phase composite varying thickness sandwich conical shells with a titanium fiber core","authors":"Z.Q. Wang, W. Zhang, Y.F. Zhang, Y.Y. Chang","doi":"10.1016/j.compstruct.2026.121051","DOIUrl":"10.1016/j.compstruct.2026.121051","url":null,"abstract":"<div><div>This paper performs the supersonic flutter analysis of a novel axially moving three-phase carbon fiber (CF) and nonlinear functionally graded graphene platelet reinforced composite (NFG-GPLRC) varying thickness sandwich conical shell with a titanium fiber core. An improved Eshelby-Mori-Tanaka technique is proposed to acquire the equivalent properties of the titanium fiber felt (TFF) core. The Halpin-Tsai technique, Mori-Tanaka technique and mixing rule are adopted to acquire the equivalent properties of three-phase CF and NFG-GPLRC face sheets. Utilizing the higher-order shear deformation theory (HSDT) with zig-zag effects, supersonic piston theory and Galerkin approach, the supersonic flutter governing formulation is determined. The precision of theoretical models is achieved by the vibration experiment, finite element model (FEM), comparison and convergence studies. The effects of the various parameters on the critical flutter pressure and velocity of axially moving sandwich conical shells are researched. The results indicate that the addition of a titanium fiber core and GPL reinforcement significantly enhances the frequencies and critical flutter performances of carbon fiber reinforced conical shells, and the NFG-A GPL nonlinear distribution pattern has higher critical flutter pressure and velocity. This research provides valuable insights for supersonic flutter analysis and design of axially moving three-phase composite variable thickness sandwich structures.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"400 ","pages":"Article 121051"},"PeriodicalIF":7.8,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149351185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Nonlinear thermo-viscoelastic characterisation and modelling of adhesively bonded joints in CFRP-strengthened steel cfrp增强钢粘接接头的非线性热粘弹性特性与建模

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-11-01 Epub Date: 2026-10-27 DOI: 10.1016/j.compstruct.2026.121058

Songbo Wang, Wanbin Deng, Xingyang He, Jiayi He, Ben Mou, Tim Stratford

{"title":"Nonlinear thermo-viscoelastic characterisation and modelling of adhesively bonded joints in CFRP-strengthened steel","authors":"Songbo Wang, Wanbin Deng, Xingyang He, Jiayi He, Ben Mou, Tim Stratford","doi":"10.1016/j.compstruct.2026.121058","DOIUrl":"10.1016/j.compstruct.2026.121058","url":null,"abstract":"<div><div>Adhesively bonded carbon fibre-reinforced polymer (CFRP) plates are widely used to strengthen ageing steel members, but the long-term performance of such retrofits is governed by the adhesive layer’s thermo-viscoelastic behaviour. This paper presents an experimental–numerical framework for the nonlinear thermo-viscoelastic characterisation of a structural adhesive and for evaluating the effects of sustained loading on the CFRP-strengthened steel beams. Frequency-scan tests were conducted at temperatures from 25 °C to 85 °C and strain amplitudes from 0.01% to 0.50% to capture nonlinear strain-dependent modulus behaviour. Using time–temperature superposition, nonlinear master curves were constructed. Two constitutive models were calibrated: (i) a temperature-dependent Prony-series viscoelastic representation; and (ii) a reduced-parameter Parallel Rheological Framework (PRF) model incorporating stress-dependent flow. Both models were evaluated against isothermal creep responses and then implemented in finite-element models of CFRP-strengthened steel beams to quantify plate-end slip, redistribution of adhesive shear stress, and changes in strengthening effectiveness. The simulations indicate that viscoelastic creep can increase plate-end slip by up to 100% over 30 years, accompanied by a reduction in CFRP tensile stress and significant relaxation of adhesive shear stress over time. At elevated temperatures, a substantial loss of strengthening effectiveness could occur within the first year of service. The Prony Series approach provides excellent agreement across wide time scales, while the PRF model offers a practical, unified nonlinear description. Taken together, the two approaches aim to address complementary practical research needs, each contributing distinct advantages within its respective scope of application.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"400 ","pages":"Article 121058"},"PeriodicalIF":7.8,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149350598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0