Composite Structures最新文献

{"title":"Numerical investigations of the vibration damping properties of carbon/flax hybrid fiber-reinforced composite structures with perturbation method","authors":"V. Couillard,&nbsp;K. Chikhaoui,&nbsp;L. Duigou,&nbsp;Y. Guevel,&nbsp;J.M. Cadou","doi":"10.1016/j.compstruct.2025.119479","DOIUrl":"10.1016/j.compstruct.2025.119479","url":null,"abstract":"<div><div>The purpose of the present paper is to develop a numerical approach to model and simulate the vibratory behavior of carbon/flax hybrid fiber-reinforced composite structures. Carbon- and flax-fiber hybridization enables to take advantage of both the stiffness of the former and the damping capacity of the latter. The presence of flax fibers in hybrid composites results in a frequency-dependent viscoelastic behavior. Constitutive laws, such as hysteretic, Fractional derivative Zener and Generalized Maxwell, are used to take this viscoelasticity into account. The difference in material per layer, due to hybridization, implies the use of a different constitutive law per layer. The first challenge of these works is to be able to consider various materials, fiber orientations, layer thicknesses and constitutive laws in the modeling of hybrid composite structures. Then, in the case of free vibrations, the structural behavior is simulated to investigate the damping properties of hybrid composites. Damped natural frequencies and structural loss factors are computed. Perturbation technique is used to account for the nonlinear frequency-dependence arising from viscoelastic constitutive laws. In order to validate the proposed approach, examples from the literature are referred to.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"371 ","pages":"Article 119479"},"PeriodicalIF":6.3,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144713332","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}

{"title":"Multiscale modeling of frontal polymerization in laminated and woven composites","authors":"Michael Zakoworotny ,&nbsp;Gavin DeBrun ,&nbsp;Sameh H. Tawfick ,&nbsp;Jeffery W. Baur ,&nbsp;Philippe H. Geubelle","doi":"10.1016/j.compstruct.2025.119488","DOIUrl":"10.1016/j.compstruct.2025.119488","url":null,"abstract":"<div><div>Frontal polymerization (FP) of thermoset fiber-reinforced composites involves the propagation of a reaction front that cures the composite rapidly and efficiently. In this work, we present a numerical model based on a homogenized thermo-chemical framework to simulate FP in composites at the mesoscale by homogenizing the fiber and resin, and capture the impact of the composite morphology on the propagation of the polymerization front. We use homogenization principles to predict the average macroscopic front speed in the composite and compare the analytical models to the numerical solutions. The study involves two classes of composites - laminated and woven composites - and investigates the effect of the fiber volume fraction and composite design on the front speed. We find that finite-dimensional effects may cause the front speed to deviate from the homogenized prediction in composite laminates. Likewise, the front speed may exceed the homogenized prediction in woven composites due to the heterogeneity in resin distribution and the emergence of temperature overshoots at lower fiber volume fractions.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"371 ","pages":"Article 119488"},"PeriodicalIF":6.3,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144713333","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}

{"title":"Reliability prediction framework for woven CMCs structures based on multi-scale uncertainty and artificial neural networks","authors":"Yue Zhou ,&nbsp;Sheng Zhang ,&nbsp;Chenxin Lin ,&nbsp;Chengqian Dong ,&nbsp;Xiguang Gao ,&nbsp;Yingdong Song ,&nbsp;Fang Wang","doi":"10.1016/j.compstruct.2025.119507","DOIUrl":"10.1016/j.compstruct.2025.119507","url":null,"abstract":"<div><div>This study addressed the uncertainties in mesoscopic geometric and performance parameters of woven ceramic matrix composites induced during the weaving and densification processes. Based on the concept of multi-scale stochastic propagation, a neural network prediction method for structural reliability was proposed. Fiber tests were conducted to obtain the distributions of fiber modulus, strength, and radius, which were used to simulate the mesoscopic performance distribution of yarns. Mesoscopic geometric parameter distributions were derived from XCT, and the harmony search algorithm was employed to optimize parameter combinations. A dataset was established using multi-scale simulation methods. A two-level ANN reliability prediction surrogate model was developed, achieving an average prediction error of 3.81% for the structural failure load, with the predicted failure regions aligning with experimental results. Sensitivity analysis of mesoscopic parameters based on the PAWN and SHAP methods revealed that the minor-axis length has a significant influence on the structural failure load.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"371 ","pages":"Article 119507"},"PeriodicalIF":6.3,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144696525","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}

{"title":"Thermo-mechanical stability analysis of FG composite beam-type structures with open thin-walled cross-sections considering temperature distributions","authors":"Sandra Kvaternik Simonetti,&nbsp;Domagoj Lanc,&nbsp;Goran Turkalj","doi":"10.1016/j.compstruct.2025.119503","DOIUrl":"10.1016/j.compstruct.2025.119503","url":null,"abstract":"<div><div>This research investigates the stability behaviour of functionally graded (FG) thin-walled beam-type structures under thermo-mechanical loads. For this purpose, a geometrically nonlinear beam finite element formulation is introduced capable of modelling stability problems arising from varying temperature conditions. Uniform, linear, and nonlinear temperature distributions through the wall thickness are considered, respectively, and a linear distribution along the beam is also allowed. Temperature-dependent material properties are allowed using the power-law function. The equilibrium equations of the beam element are derived using the updated Lagrangian incremental formulation and the principle of virtual works. The small strain and large rotation conditions are assumed to be valid. Stress resultants are calculated by the Euler-Bernoulli-Navier and Vlasov theories for bending and torsion, respectively. On the basis of the aforementioned FG beam formulation, a computer program is developed. The program has capabilities to deal with both approaches, i.e. the eigenvalue and load-deformation ones, respectively. In the latter case, a small perturbation load need to be introduced along with the nominal load. By imposing different boundary conditions, power-law index values and FG distributions, the buckling temperature value as well as the nonlinear response of a beam-type structure under consideration can be determined. The obtained results are compared with those available from existing literature or obtained by the shell finite element model.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"371 ","pages":"Article 119503"},"PeriodicalIF":6.3,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144703965","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}

{"title":"Flexural properties of thin foam hybrid core sandwich panels with honeycomb cut in three-point bending: Experimental investigation and numerical analysis","authors":"Yukinori Miyagawa ,&nbsp;Keita Goto ,&nbsp;Masahiro Arai ,&nbsp;Akinori Yoshimura","doi":"10.1016/j.compstruct.2025.119477","DOIUrl":"10.1016/j.compstruct.2025.119477","url":null,"abstract":"<div><div>This study investigated the effects of introducing honeycomb cuts in thin foam sandwich plates on their bending properties via experiments, theoretical analyses, and FEA. Ultrathin (0.6 mm-thick) composite sandwich panels with CFRP face sheets and a core flake transfer sheet, which was a PMI foam with honeycomb cuts for better formability, were fabricated via autoclave molding. These observations indicate that the resin flowed into the cuts to form a honeycomb structure, resulting in a hybrid core sandwich panel and increased weight. A three-point bending test was performed on the sandwich beams. The cuts increased the effective bending stiffness, decreased the bending strength, and shifted the failure mode from top face sheet delamination to top face compression failure. A theoretical analysis revealed that this increase in the effective bending stiffness was caused by the addition of the resin honeycomb, which increased the shear stiffness. Furthermore, the FEA results indicated that the addition of a higher-stiffness honeycomb to the core redistributed the stress. These results show that foam cutting increases the flexural rigidity of thin sandwich panels as well as suppresses face sheet delamination and core compression while reducing flexural strength and promoting face compression failure owing to the stress concentration.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"371 ","pages":"Article 119477"},"PeriodicalIF":6.3,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714443","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}

{"title":"An explicit finite element analysis of Low-Velocity impact and compression after impact in composite laminates","authors":"K. Tian ,&nbsp;J. Zhi ,&nbsp;V.B.C. Tan ,&nbsp;T.E. Tay","doi":"10.1016/j.compstruct.2025.119505","DOIUrl":"10.1016/j.compstruct.2025.119505","url":null,"abstract":"<div><div>This study investigates the numerical simulation of low-velocity impact (LVI) and compression after impact (CAI) in composite laminates using an explicit finite element (FE) framework based on the Floating Node Method (FNM). The performance of the explicit FNM model and its implicit counterpart were compared for three LVI and one CAI cases. The explicit framework integrates advanced failure models to simulate matrix cracking, fiber damage, and delamination, while geometric nonlinearity is addressed through an updated Lagrangian formulation. Results show that the explicit FNM method accurately predicts load–displacement behavior, damage evolution, and residual strength, demonstrating strong agreement with experimental data and improved computational efficiency compared to the implicit approach. These findings highlight the potential of the explicit FNM framework for efficient and accurate analysis of composite impact and post-impact performance with discrete crack models (DCMs).</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"371 ","pages":"Article 119505"},"PeriodicalIF":6.3,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144672327","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}

{"title":"A novel composite of Closed-Cell aluminum foam and Phase-Change material for enhanced mechanical safety in EV battery systems","authors":"Peng Zhang ,&nbsp;Hui Zhang ,&nbsp;Nianqi Chen ,&nbsp;Ningzhen Wang ,&nbsp;Changping Song ,&nbsp;Ruyuan Yang ,&nbsp;Xiang Chen","doi":"10.1016/j.compstruct.2025.119504","DOIUrl":"10.1016/j.compstruct.2025.119504","url":null,"abstract":"<div><div>This study proposes an innovative physical modification-infusion strategy to uniformly infuse phase change material (PCM) into the physically modified closed-cell aluminum foam (PMAF) via vacuum-assisted infusion technology. The resulting aluminum-foam-based phase-change composite material (AFPCM) combines the high energy absorption characteristics of aluminum foam with the thermal energy storage capacity of PCM, forming a three-dimensional interconnected composite structure that enables both mechanical performance enhancement and efficient thermal energy storage. Experimental results showed that, compared with untreated closed-cell aluminum foam (CCAF), the compressive strength of AFPCM increased by 45.2 %, the elastic modulus increased by 14.4 %, and the energy absorption increased by 55.7 %, based on a matrix density of 0.4 g/cm³. CT scans further confirmed the uniform distribution of PCM within the PMAF, ensuring the stability of material properties. In addition, battery system simulations showed that AFPCM exhibits excellent mechanical safety, providing a scalable and structurally integrated solution for the next generation of electric vehicle battery systems. Future research will further explore the dynamic response under impact load, thermal properties of AFPCM, and investigate the structural design and thermal management simulation of battery integration in depth.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"371 ","pages":"Article 119504"},"PeriodicalIF":6.3,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679998","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}

{"title":"Three-dimensional printing of PLA/CF/CNT “micro/nano” multi-scale fiber reinforced polymer composites with enhanced Mode-I fracture toughness and interlaminar shear strength: Effect of thermal press post treatment","authors":"George Kampourakis ,&nbsp;Fivos Simopoulos ,&nbsp;George Karalis ,&nbsp;Emmanouil Porfyrakis ,&nbsp;Miron Krassas ,&nbsp;Stavros Katsiaounis ,&nbsp;Konstantinos Papagelis ,&nbsp;Aaron Soul ,&nbsp;Dimitrios G. Papageorgiou ,&nbsp;Jitong Zhao ,&nbsp;Marco Liebscher ,&nbsp;Panos Chatzakos ,&nbsp;Nikolaos Papadakis ,&nbsp;Lazaros Tzounis","doi":"10.1016/j.compstruct.2025.119493","DOIUrl":"10.1016/j.compstruct.2025.119493","url":null,"abstract":"<div><div>Fused Filament Fabrication (FFF) three-dimensional (3D) printing empowers advanced and complex fiber-reinforced polymer (FRP) composites, but also possesses unavoidable high void content and limited interlaminar strength. Multi-scale reinforcement can effectively mitigate the out-of-plane performance limitations of 3D printed FRPs, by the incorporation of nano-additives at filament level. 3D printed continuous FRP composites of Polylactic acid (PLA)/ Carbon Fiber (CF)/ multi-walled carbon nanotubes (CNTs) with enhanced interlaminar strength and fracture toughness are reported for the first time. A custom roll-to-roll (R2R) line is developed for the impregnation of CF tows (3 K) with neat PLA and PLA/CNT nanocomposite polymer solutions, further employed as feedstock for single feed FFF 3D printing (3DP). PLA/CF and PLA/CF/CNT unidirectional (UD) 12-ply laminates ([0]₁₂) are manufactured and thoroughly investigated through microstructural and physicochemical analyses, as well as mechanical testing, both for “as printed” (AP) and post-processed “thermally pressed” (TP) specimens. Namely, quasi-static flexural, short beam shear (SBS), Mode-I interlaminar fracture tests, Dynamic Mechanical Analysis (DMA) and fractography investigations elucidate the reinforcing mechanisms of CNTs in the 3DP CFRP laminates, i.e. via matrix stiffening, crack deflection, etc., significantly increasing the interlaminar shear strength (ILSS) and fracture toughness (G_IC). The ultimate flexural strength (<em>σ_UFS</em>) is increased by 8.9 %, the storage modulus (<em>E′</em>) by 6.7 %, the ILSS by 30.1 % and the G_IC by 32.0 % for the PLA/CF/CNT (TP) multi-scale composites. This work highlights a versatile approach for the effective utilization of nanoinclusions within the thermoplastic matrix of continuous 3DP FRPs showing enhanced mechanical performance.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"371 ","pages":"Article 119493"},"PeriodicalIF":6.3,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679999","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}

{"title":"Design and validation of quasi-zero stiffness metamaterial core in composite sandwich structures","authors":"Deng’an Cai,&nbsp;Hang Zhang,&nbsp;Xinwei Wang","doi":"10.1016/j.compstruct.2025.119502","DOIUrl":"10.1016/j.compstruct.2025.119502","url":null,"abstract":"<div><div>Rapid advancements in aerospace, high-speed rail, and precision instrumentation have driven the evolution of multifunctional structures. Quasi-zero stiffness sandwich structures integrate load-bearing capacity and vibration isolation by combining elastic supports with core materials that exhibit a nonlinear response under stress. This paper presents the design of a new quasi-zero stiffness composite sandwich panel, combining the lightweight and high-strength properties of carbon fiber laminates with the quasi-zero stiffness characteristics of the core structure. The design integrates lightweight, load-bearing, and vibration damping functions. The test specimens were fabricated using 3D printing and prepreg curing molding techniques. The quasi-zero stiffness behaviour of the structure was verified through simulation analyses and quasi-static compression tests. Additionally, dynamic tests were performed to assess the elastic wave transmission characteristics of the specimens under varying preload conditions (3.6 kg, 4.3 kg, 5.2 kg, and 6.5 kg). The results revealed that the sandwich structure exhibited optimal vibration damping performance under a preload of 5.2 kg, with an average acceleration transfer rate of –22 dB over the frequency range of 0 – 100 Hz, demonstrating excellent low-frequency vibration damping performance. Leveraging the superior mechanical properties of carbon fiber panels, this material is highly adaptable to a range of application scenarios and holds significant potential for engineering applications.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"371 ","pages":"Article 119502"},"PeriodicalIF":6.3,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144663610","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}

{"title":"Sustainable auxetic honeycomb structures based on sugarcane bagasse fibres and recycled rubber wastes","authors":"Sergio Luiz Moni Ribeiro Filho ,&nbsp;Yousef Dobah ,&nbsp;Rodrigo Teixeira Santos Freire ,&nbsp;Tulio Hallak Panzera ,&nbsp;Fabrizio Scarpa","doi":"10.1016/j.compstruct.2025.119506","DOIUrl":"10.1016/j.compstruct.2025.119506","url":null,"abstract":"<div><div>This work introduces a novel and sustainable approach for recycling sugarcane bagasse fibres and rubber wastes to improve the mechanical properties and the auxetic characteristics of re-entrant honeycomb structures. Tensile tests, analytical predictions, and multiscale computational analysis are conducted to assess the relationship between the mechanical properties and cell geometric variables. A full factorial design (2³) is performed to evaluate the sensitivity of factors such as thickness (2 and 4 mm), length (10 and 20 mm) and angle (−10 and −20°) on the ultimate tensile strength and strain, tensile modulus, and Poisson’s ratio of the auxetic structures. Significant effects and contributions are identified through an Analysis of Variance (ANOVA), indicating that the incorporation of short, random sugarcane bagasse fibres combined with rubber particles enhances the toughness of the auxetic structure. The ultimate tensile strength and tensile modulus have a positive correlation with increased thickness. The Poisson’s ratio is affected not only by individual factors but also by third-order interactions among the re-entrant topologies, with wall length and thickness having the most significant impact on the hybrid re-entrant structure.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"371 ","pages":"Article 119506"},"PeriodicalIF":6.3,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144656627","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}