Composite Structures最新文献

{"title":"Strength through curvature: Engineering multi-phase materials based on chiral aperiodic monotile patterns","authors":"Jiyoung Jung ,&nbsp;Kundo Park ,&nbsp;Grace X. Gu","doi":"10.1016/j.compstruct.2025.119131","DOIUrl":"10.1016/j.compstruct.2025.119131","url":null,"abstract":"<div><div>Developing new materials with superior mechanical properties is crucial in various engineering applications. This study introduces novel multi-phase materials created using chiral aperiodic monotile patterns, distinguished by their curved edges and ability to cover a surface without translational symmetry. We employ multi-objective Bayesian optimization and crack phase-field modeling to explore the mechanical properties of the chiral aperiodic monotile composites, considering the topology, volume fraction, and constituent materials as design variables. Pareto-optimal designs are selected for experimental validation using additive manufacturing and mechanical testing. The experimental results show that these aperiodic composites exhibit an improved balance of mechanical properties, including strength, work of fracture, and failure strain, that typically involve trade-offs in conventional periodic structures. This is primarily attributed to the superior interlocking effect introduced by the curved edges, leveraging the load-bearing capacity of both constituent materials. Additionally, our findings show that the toughening mechanisms and crack propagation paths of these aperiodic composites can be tuned to undergo different failure modes from brittle to ductile fracture along the Pareto front, highlighting the composite’s exceptional ability to be tailored for different design purposes. This research underscores the potential of chiral aperiodic monotiles, paving the way for developing high-performance structural materials.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"365 ","pages":"Article 119131"},"PeriodicalIF":6.3,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143816257","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 analysis of elastic properties of 3D-printed carbon fiber-reinforced nylon-based composites: Numerical approach","authors":"Meirong Hao ,&nbsp;Lai Liang ,&nbsp;Jialin Wang ,&nbsp;Lanlan Jiang ,&nbsp;Zaoyang Guo ,&nbsp;Jun Liang","doi":"10.1016/j.compstruct.2025.119158","DOIUrl":"10.1016/j.compstruct.2025.119158","url":null,"abstract":"<div><div>This paper reports the investigation of the elastic properties of 3D-printed carbon fiber-reinforced nylon-based composites (CFRNCs) using experiments and multi-scale numerical modeling. Short-cut carbon fiber-reinforced nylon-based composites (sCFRNCs) and continuous carbon fiber-reinforced nylon-based composites (cCFRNCs) laminates were printed, and a comprehensive set of experimental data for their elastic properties was obtained. Some data were used to calibrate the material parameters of the printed filaments, and the rest were employed to assess the predictive capability of the multi-scale numerical model at determining the elastic parameters of macroscale 3D-printed laminates. Also, the elastic parameters of microscale printed filaments and mesoscale unidirectional laminas were determined. Unlike conventional models, this model considered the structural characteristics of the 3D-printed laminates, where each layer of the laminates was divided into a wall zone, edge zone, and unidirectional laminate zone at the macroscale. The results showed that the reinforcement in both the carbon fiber (CF) filaments and Onyx filaments was T300 CF monofilaments, while the matrix was different types of nylon materials. The predicted tensile modulus of CF filaments closely matched the experimental values reported in the literature, with an error of −0.95 %. Similarly, the predicted elastic properties of 3D-printed laminates agreed well with the experimental results, while the multi-scale model performed better for the 0° cCFRNCs laminates than the multi-directional cCFRNCs laminates. For the 0° laminates, the absolute error was less than 5.5 %, but for the multi-directional laminates, the absolute error was less than 9 %, with a few exceptions. In addition, a linear relationship was found between the tensile modulus and the mesoscale fiber volume fraction in 0° laminates, similar to the rule of mixtures (ROM) model. The results revealed that the ROM model served as a simplified model to replace the multi-scale numerical model for 0° cCFRNCs laminates when the influence of the edge zone was appropriately considered. An attempt was also made to employ a coordinate transformation (CT) method to simplify the multi-scale numerical model for off-axis multi-directional laminates. The results indicated that this method was ineffective when the edge zone was not considered.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"364 ","pages":"Article 119158"},"PeriodicalIF":6.3,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785326","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":"The effect of compressive transverse stress on the mode II fracture toughness of composite joints used in structural batteries","authors":"Maryam Niazi ,&nbsp;Federico Danzi ,&nbsp;Denis Dalli ,&nbsp;Pedro P. Camanho","doi":"10.1016/j.compstruct.2025.119053","DOIUrl":"10.1016/j.compstruct.2025.119053","url":null,"abstract":"<div><div>In the development of structural batteries, achieving optimal performance relies on the effective integration of different materials. Glass fiber Reinforced Polymer (GFRP) can be used as an insulator and structural shell in various types of structural batteries. However, the elastic mismatch with metallic current collectors can lead to interface cracks, compromising the mechanical and electrochemical functionality of the system. In this study, the modified transverse crack tension test is used to measure the mode II interlaminar fracture toughness of GFRP/current collector interfaces, with the current collectors being aluminum and copper. The dominance of mode II loading, using the modified transverse crack tension specimens is verified using the virtual crack closure technique. For the designed configurations, an analytical, closed-form solution to obtain the mode II interlaminar fracture toughness equation is derived, and verified numerically, considering residual thermal stresses and elastic mismatch. The effects of metal surface treatment and transverse pressure on mode II fracture toughness are assessed and compared with untreated samples and an All-GFRP configuration. Digital image correlation technique is employed to accurately identify the onset of crack propagation of each specimen. Additionally, scanning electron microscopy images of the surfaces of the current collectors are taken after debonding to analyze the failure mechanisms. The findings indicate that both compressive transverse stress and Sol–Gel surface treatment are effective techniques for enhancing the mode II interlaminar fracture toughness of hybrid joints in structural batteries.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"364 ","pages":"Article 119053"},"PeriodicalIF":6.3,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143776999","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":"Modelling of dynamic flexural response of composite eco-structure beams using a 3D elastic–plastic damage model","authors":"John Susainathan ,&nbsp;Enrique Barbero ,&nbsp;Sonia Sanchez ,&nbsp;Arthur Cantarel ,&nbsp;Florent Eyma","doi":"10.1016/j.compstruct.2025.119119","DOIUrl":"10.1016/j.compstruct.2025.119119","url":null,"abstract":"<div><div>The dynamic flexural behaviour of sandwich beams made of a composite eco-structure (plywood and flax/epoxy composite skin) is studied using an explicit 3D numerical model. The model includes a constitutive elastic–plastic behaviour with a plastic potential and its consistency multiplier-based yield stress criteria, a modified 3D-Hashin damage initiation and a strain threshold-based exponential damage evolution model. Experimental tests at different impact energies were carried out to validate the proposed model. The variation of force with time and displacement as well as the velocity–time profile are accurately predicted. The model is able to capture the stiffness degradation, post-peak softening, de-kinking and unloading phase that appear in the force–displacement curve. The validated model is employed to investigate the evolution of inter- and intralaminar damage for different impact energies. The most relevant damage modes are delamination and compressive damage modes (transverse and normal) for the impact energies studied.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"364 ","pages":"Article 119119"},"PeriodicalIF":6.3,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768743","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":"High-sensitivity rGO/epoxy strain sensor integrated into CFRP composite structures","authors":"Shengjie Wang ,&nbsp;Wenhao Zhao ,&nbsp;Binghao Lang ,&nbsp;Yana Wang ,&nbsp;Yifeng Dong ,&nbsp;Qiqige Wuyun ,&nbsp;Hongshuai Lei ,&nbsp;Xuefeng Yao ,&nbsp;Heng Yang","doi":"10.1016/j.compstruct.2025.119159","DOIUrl":"10.1016/j.compstruct.2025.119159","url":null,"abstract":"<div><div>Carbon fiber-reinforced polymer (CFRP) composites are widely used in aerospace and automotive industries for their superior mechanical properties and lightweight characteristics. However, their complex behavior challenges structural safety, requiring effective online monitoring. Existing sensors lack sufficient sensitivity to detect minor damage, while embedded sensors may compromise the mechanical properties of CFRP, impairing long-term strain monitoring. This study proposes a reduced graphene oxide (rGO)/epoxy strain sensor based on a pre-strain strategy, which achieves anisotropic regulation through the directional alignment of microstructures and effectively preserves both the pre-strained configuration and aligned microstructure using transfer printing technology. The sensor demonstrates a gauge factor of 80.07 under 25 % pre-strain, representing a 9.43-fold enhancement compared to sensors without pre-strain. The underlying mechanism of sensitivity enhancement was revealed using a tunneling theory model. During cyclic tensile testing, the sensor demonstrated excellent stability and repeatability, underscoring its potential for real-time structural health monitoring of CFRP composites. The simulation results demonstrate that when the thickness of the embedded sensor is 20 μm, the maximum relative strain error induced is only 1.220 %, indicating that reducing the sensor thickness is a critical approach to minimizing interference with the strain field of the composite material and preserving its mechanical properties.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"363 ","pages":"Article 119159"},"PeriodicalIF":6.3,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759537","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 stochastic fatigue analysis of CFRP laminate composites with Bayesian calibration-based characterization method","authors":"Hoil Choi ,&nbsp;Hyoung Jun Lim ,&nbsp;Dongwon Ha ,&nbsp;Jeong Hwan Kim ,&nbsp;Gun Jin Yun","doi":"10.1016/j.compstruct.2025.119139","DOIUrl":"10.1016/j.compstruct.2025.119139","url":null,"abstract":"<div><div>This paper establishes a novel multiscale stochastic fatigue analysis framework to predict the uncertainty characteristics observed in the fatigue experiments of carbon fiber reinforced polymer (CFRP) laminate composites. A Bayesian calibration-based characterization method derives fatigue parameter distributions for constituent level (fiber, matrix, interface) from lamina fatigue experimental results. With multiscale fatigue analysis framework, a micromechanics theory-based constitutive model is defined to calculate the fatigue damage at the constituent level, and the degradation effects due to fatigue damage are reflected during the finite element (FE) analysis. Additionally, the uncertainty of material properties present in the specimens is captured using the Karhunen-Loève (KL) expansion method, a spectral stochastic finite element method (SSFEM). As a result of multiscale stochastic fatigue analysis, a distribution of fatigue life and fatigue failure mechanisms can be predicted. Considering the stochastic properties observed in experimental results, it can be confirmed that the developed method accurately reflects the realistic fatigue behavior of CFRP laminate composites.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"363 ","pages":"Article 119139"},"PeriodicalIF":6.3,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747903","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":"Fail-safe topology optimization for fiber-reinforced composite structures","authors":"Fei Cheng,&nbsp;Huanfei Jia,&nbsp;Wei Ding,&nbsp;Wenjie Zuo,&nbsp;Yuqiang Fang","doi":"10.1016/j.compstruct.2025.119145","DOIUrl":"10.1016/j.compstruct.2025.119145","url":null,"abstract":"<div><div>In this paper, we address the critical issue of fiber-reinforced composite structures (FRCS) losing functionality under local damage, which is a common safety deficiency in traditional FRCS designs. We propose a fail-safe topology optimization method for fiber-reinforced composite structures, which enables concurrent optimization of fiber orientations and structural topology while enhancing safety of FRCS. The method simulates local damage by removing the stiffness of composite materials in predefined patches, aiming to minimize structural compliance under critical damage scenarios. The fiber orientations optimization employs a discrete–continuous parameterization method to reduce the risk of falling into local optima. To address the non-differentiability of max-operator, the Kreisselmeier-Steinhauser function is employed as a substitute. Sensitivities are derived using the adjoint method. The effectiveness of this method is verified through several numerical examples.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"364 ","pages":"Article 119145"},"PeriodicalIF":6.3,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768744","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":"Layup angle effects on the damage and fracture behaviour of fibre composite foldcore sandwich structures under impacts","authors":"Zhang Nana ,&nbsp;Guo Xiaoming ,&nbsp;Wang Hao ,&nbsp;K.M. Liew","doi":"10.1016/j.compstruct.2025.119146","DOIUrl":"10.1016/j.compstruct.2025.119146","url":null,"abstract":"<div><div>The S-shaped foldcore structure, an evolution of the V-shaped foldcore, offers enhanced energy absorption and impact resistance. Due to the complexity of the foldcore and the strong anisotropy of the fiber material, the fiber laying angle significantly influences the foldcore’s performance. This study investigates the effect of the fiber lay-up angle on the S-shaped foldcore’s anisotropy by fabricating foldcore sandwich composite panels using hot compression molding. Panels were laid along the in-face folding direction, the out-face folding direction, and cross-laid in both directions. A low-speed impact method was used to observe and analyze the damage to the foldcore structure. The impact process was also simulated using the finite element method combined with the Hashin’s criterion as a means of identification of material failure initiation to analyze the damage and fracture process. Results showed that the composite foldcore sandwich panel laid along the in-face folding direction exhibited the strongest impact resistance. Panels laid in the in-face folding direction were more prone to fracture due to higher damage levels, while those with fibers in the out-face folding direction were more susceptible to fiber tensile damage, causing more fracture in rear panel.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"363 ","pages":"Article 119146"},"PeriodicalIF":6.3,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759534","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}

{"title":"Metallic plate-lattice and epoxy interpenetrating phase composites for superior behavioral characteristics","authors":"Tianpeng Zhang ,&nbsp;Xiaofei Cao ,&nbsp;Hu Niu ,&nbsp;Xiao Du ,&nbsp;Yiting Guan ,&nbsp;Chunwang He ,&nbsp;Haoming Yang ,&nbsp;Ruoman Zhu ,&nbsp;Ying Li","doi":"10.1016/j.compstruct.2025.119122","DOIUrl":"10.1016/j.compstruct.2025.119122","url":null,"abstract":"<div><div>Metallic plate lattices are prone to localized buckling under external compressive loads, leading to a progressive instability of the entire structure, which remarkably limits the mechanical performance and promising application of plate lattices. To address this, we propose a novel design strategy that combines 3D printing and resin infiltration methods to construct the plate lattice-epoxy resin interpenetrating phase composite (FCC-IPCs). Quasi-static and dynamic mechanical properties and deformation modes of FCC-IPCs are investigated through simulations and experimental methods. By implementing this design strategy, deformation mode has successfully transformed from progressive instability to overall shear failure, where significant improvement in mechanical properties can be harvested. Under quasi-static loading, 36.1%, 70.6%, and 75.7% increases can be seen in specific peak stress, specific plateau stress and specific energy absorption of the FCC1-IPCs specimen, respectively. Under dynamic loading, specific plateau stress and specific energy absorption can increase by 100.7 % and 101 %, respectively. Furthermore, this design strategy is not sensitive to manufacturing defects or holes, exhibiting good robustness and applicability in aerospace and automotive engineering.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"363 ","pages":"Article 119122"},"PeriodicalIF":6.3,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738013","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":"Nonlinear dynamics of simply supported, thin laminated circular cylindrical shells coupled to large-amplitude sloshing fluid","authors":"Hamid Reza Moghaddasi ,&nbsp;Sumeet Chakraborty ,&nbsp;Marco Amabili","doi":"10.1016/j.compstruct.2025.119148","DOIUrl":"10.1016/j.compstruct.2025.119148","url":null,"abstract":"<div><div>This study investigates the nonlinear vibrations of thin laminated elastic shells with simply supported boundary conditions, subjected to large-amplitude sloshing fluid, within the framework of the Flügge-Lur’e-Byrne nonlinear shell theory. The fluid is modeled by the potential flow theory using the Laplace equation in the fluid domain, and nonlinear boundary conditions are applied at the free surface. The Lagrange multipliers method is employed to minimize the energy functional, incorporating nonlinear constraints at the fluid boundary. A harmonic excitation is applied at the mid-height of the shell, and the transient vibrations are analyzed. Results indicate that nonlinear sloshing reduces the beating action in the time-domain response but increases the radial shell deformation compared to the linear case. The effects of fluid level and nonlinearity at the fluid surface are also explored through frequency–response analysis, revealing that nonlinear sloshing significantly alters the frequency response curve, particularly for large fluid-filling ratios in flexible shells. However, the effect on the fluid free-surface profile is minimal when compared to linear slosh modeling. In contrast, stiff shells exhibit a pronounced effect of nonlinear sloshing on the fluid free-surface elevations.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"365 ","pages":"Article 119148"},"PeriodicalIF":6.3,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143821467","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}