Composite Structures最新文献

{"title":"Multi-body dynamic transfer matrix modeling and validation for full-scale wind turbine blades in biaxial fatigue testing systems","authors":"Yi Ma,&nbsp;Aiguo Zhou,&nbsp;Yutian Zhu,&nbsp;Jinlei Shi,&nbsp;Shiwen Zhao,&nbsp;Jianzhong Wu","doi":"10.1016/j.compstruct.2025.119205","DOIUrl":"10.1016/j.compstruct.2025.119205","url":null,"abstract":"<div><div>Continuous advancements in wind turbine technology, driven by the pursuit of increased power generation and extended blade dimensions, have heightened the demand for reliable biaxial fatigue testing of full-scale blades. Such testing is critical for evaluating long-term structural integrity under realistic loading conditions. This study presents a novel multi-body dynamic transfer matrix methodology to address the modeling and analysis challenges inherent in full-scale biaxial testing systems for large wind turbine blades. The proposed approach discretizes the heterogeneous blade structure into beam elements and employs transfer matrix theory to derive system matrices encompassing spatial beam dynamics, mass distribution, damping characteristics, and elastic properties. Through the systematic formulation of the dynamic transfer equations and subsequent numerical solutions of the characteristic equations, this method enables comprehensive vibration analysis of the multi-body test system. Comparative validation through finite element simulations and experimental measurements demonstrates that the equivalent model achieves prediction discrepancies below 7% across multiple blade configurations. The developed framework provides an effective multibody transfer matrix model for investigating vibration characteristics and bending moment distributions in blade fatigue testing systems, establishing theoretical foundations for dynamic characterization and optimized design of full-scale biaxial fatigue testing platforms.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"365 ","pages":"Article 119205"},"PeriodicalIF":6.3,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838928","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":"Fatigue response and fracture mechanisms of polymer matrix composites under dominance of the self-heating effect","authors":"Andrzej Katunin ,&nbsp;Tomasz Rogala ,&nbsp;Jafar Amraei ,&nbsp;Dominik Wachla ,&nbsp;Marcin Bilewicz ,&nbsp;Łukasz Krzemiński ,&nbsp;Paulo N.B. Reis","doi":"10.1016/j.compstruct.2025.119207","DOIUrl":"10.1016/j.compstruct.2025.119207","url":null,"abstract":"<div><div>The self-heating effect in polymer matrix composites (PMCs) can be dangerous due to dominance of the fatigue process and its significant acceleration. Therefore, investigation of its influence on structural behavior and thermomechanical response is crucial for safe and reliable operation of PMCs. Due to lack of standardization of criteria of determination of fatigue properties, such as fatigue limit, during various modes of fatigue loading, the investigation of fatigue response attracts special attention. In some loading scenarios when the process is dominated either by mechanical fatigue degradation or self-heating effect, the classical approaches to determine fatigue limit may fail. This implies the need to establish new criteria for fatigue limit determination, also considering stress relaxation. In this study, the authors demonstrated that fatigue behavior is represented by bi-linear <em>S</em>-<em>N</em> curve, which reveals different thermomechanical responses and damage mechanisms under specific loading conditions. Moreover, it was demonstrated the existence of a transition point on the intersection of these <em>S</em>-<em>N</em> curves, where dominance of self-heating effect and mechanical degradation was clearly noticeable. The fatigue process for both mentioned regimes was characterized in terms of self-heating temperature evolution and acoustic emission, which was validated by microscopic analysis and X-ray computed tomography after fatigue failure.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"365 ","pages":"Article 119207"},"PeriodicalIF":6.3,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834419","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":"Effects of grinding parameters on material failure mechanisms of 2D silicon carbide fiber-reinforced silicon carbide composites","authors":"Yao Liu ,&nbsp;Zhaokun Zhang ,&nbsp;Jiahao Li ,&nbsp;Jinzhu Guo ,&nbsp;Jinjie Zhou ,&nbsp;Chunlei K. Song","doi":"10.1016/j.compstruct.2025.119175","DOIUrl":"10.1016/j.compstruct.2025.119175","url":null,"abstract":"<div><div>The Silicon Carbide Fiber-Reinforced Silicon Carbide (SiC_f/SiC) composite is widely used in ultra-high-temperature applications due to its exceptional properties, but its brittleness makes machining, especially grinding, challenging. This study investigates the failure modes of fibers and the matrix during grinding of 2D SiC_f/SiC composites under varying process parameters, such as wheel speed, feed rate, grinding depth, and surface structure. The results show that transverse fibers undergo ductile removal, shear fracture, bending fracture, and tensile fracture, while longitudinal fibers primarily experience ductile removal, tensile fracture, and bending fracture and normal fibers mainly exhibit shear and bending fractures. The matrix exhibits ductile, brittle, powdery, and peel-off removal modes. Grinding the woven surface (WS) leads to higher grinding forces and surface roughness than the stacking surface (SS), due to differences in fracture mechanisms. The primary material removal mechanisms of grinding wheel are friction wear and grit breakage, resulting from the high hardness of SiC_f/SiC. Increasing wheel speed reduces both grinding force and surface roughness by promoting ductile removal, which is attributed to decreased undeformed chip thickness and enhanced strain toughness. The optimal grinding conditions are high wheel speed and sharp grit on the SS, yielding the best surface quality.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"365 ","pages":"Article 119175"},"PeriodicalIF":6.3,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828157","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":"Dynamics of FG nanobeams on nonlocal medium","authors":"Baidehi Das ,&nbsp;Daniele Ussorio ,&nbsp;Marzia Sara Vaccaro ,&nbsp;Raffaele Barretta ,&nbsp;Raimondo Luciano","doi":"10.1016/j.compstruct.2025.119057","DOIUrl":"10.1016/j.compstruct.2025.119057","url":null,"abstract":"<div><div>Nanotechnology is central in several research fields, from bioengineering to energy harvesting, in which the topic of functionally graded (FG) nanobeams resting on nano-foundations is highly investigated in both static and dynamic contexts. In order to make the structure-foundation problem result to be well-posed, the Eringen–Wieghardt theory has been replaced with a novel nonlocal approach based on stress- and displacement-driven integral constitutive laws. This methodology provides nonlocal elastic curvature and foundation reaction fields as spatial convolutions driven by bending interaction and displacement fields, respectively. In this paper, an analytical approach is described to reverse the relevant integro-differential elastodynamic problem into an equivalent purely differential formulation. The relevant eigenanalysis of nanobeams resting on elastic foundations is carried out. Natural frequencies and mode shapes are evaluated for simple structural schemes of current interest in Nano-Engineering. The outcomes can be valuable for sustainable design and optimization of composite structural nanocomponents of modern small-scale systems.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"366 ","pages":"Article 119057"},"PeriodicalIF":6.3,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887041","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":"Topology optimization of hard-magnetic soft laminates for wide tunable SH wave bandgaps","authors":"Zeeshan Alam,&nbsp;Atul Kumar Sharma","doi":"10.1016/j.compstruct.2025.119157","DOIUrl":"10.1016/j.compstruct.2025.119157","url":null,"abstract":"<div><div>The periodic laminates made of hard-magnetic soft materials (HMSMs) have recently received increasing attention due to their tunable phononic bandgap characteristics—ranges of frequencies at which sound and vibrations cannot propagate, which can be controlled remotely through magnetically induced finite deformations. In this work, we present a gradient-based topology optimization framework for determining the optimum distribution of laminate phases to optimize the anti-plane shear wave (SH wave) bandgap characteristics. In particular, by employing the method of moving asymptotes (MMA), we maximize the bandgap width when the laminate is subjected to external magnetic fields. The Gent material model of hyperelasticity, in conjunction with the ideal HMSMs model, is used to describe the constitutive response of the laminate phases. To extract the band structure of the hard-magnetic soft laminate, we employ an in-house finite element model. To demonstrate the capability of the developed numerical framework, a parametric study exploring the effect of the applied external magnetic field on the optimized bandgap characteristics and the design of the periodic laminated composite unit cell is presented. The optimization framework presented in this study will be helpful in the design and development of futuristic tunable wave manipulators.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"366 ","pages":"Article 119157"},"PeriodicalIF":6.3,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143852229","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":"Visco-elastoplastic constitutive modeling of coated woven fabrics — Impact of inelastic response on structural analysis","authors":"L. Makhool,&nbsp;D. Balzani","doi":"10.1016/j.compstruct.2025.119164","DOIUrl":"10.1016/j.compstruct.2025.119164","url":null,"abstract":"<div><div>A constitutive model for the highly nonlinear, anisotropic, and inelastic behavior of coated woven fabrics is proposed by suitably combining different model components from the literature. The material model accounts for viscoelasticity and plastic anisotropy at finite strains and thus, enables the geometrically nonlinear simulation of engineering constructions including prestretch processes and history-dependent load protocols. The formulation is adjusted to experimental data, specifically designed to isolate the individual aspects of the model, and it shows a decent agreement with the data. A numerical integration procedure is provided and the utilization of the model in a computational setting is addressed. Through an exemplary boundary value problem replicating a simplified roof construction, the impact of the individual features of the model on the structural response are analyzed and compared with the linear elastic model commonly used in engineering practice and a competitive hyperelastic model from the literature. As a result, the model shows significant differences to the simpler formulations and is thus found beneficial for the numerical analysis of structural problems.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"365 ","pages":"Article 119164"},"PeriodicalIF":6.3,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843052","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":"Study on the flexural creep stiffness of chopped basalt fiber reinforced asphalt using finite elements and mean field homogenization","authors":"Xing Wu ,&nbsp;Gabriele Milani ,&nbsp;Aihong Kang ,&nbsp;Pengfei Liu","doi":"10.1016/j.compstruct.2025.119197","DOIUrl":"10.1016/j.compstruct.2025.119197","url":null,"abstract":"<div><div>The aim of the paper is to study the flexural creep stiffness of chopped basalt fiber reinforced asphalts (CBFRAs) using both the finite element (FE) and the mean field homogenization (MFH) method. First, a reliable three-dimensional FE model of a chopped basalt fiber reinforced asphalt is artificially generated with Matlab. Two FE models, in which wire and solid elements are used to mesh fibers, are numerically tested in bending and compared, validating them against experimental results. Then, two different mean field homogenization analytical models based on the Mori-Tanaka approach, which consider the random fiber orientations are developed and applied to predict the flexural creep stiffness of CBFRAs. Third, different fiber approximation methods are considered to carry out MFH computations. Fourthly, the MFH-amending-coefficient (MFHAC) method is proposed to amend MFH predictions, to improve convergence towards FE results. Finally, the MFH methods are compared with several traditional micro-mechanical models available. The results show that there is a significant difference between the results obtained using wire and solid elements, the solid FE model being more reliable. Particular attention should be paid to the values adopted for the fiber simplification number, to match correctly with experimental evidence. The flexural creep stiffness predicted by the two proposed MFH analytical models are closely aligned one each other. The fiber approximation methods adopted during the MFH analysis affect the results, with predictions more accurate when the actual fiber bundle is represented as an ellipsoidal inclusion based on the same-volume-radius criterion. The MFH-amending-coefficient method, combined with the results provided by MFH, can correctly predict the flexural creep stiffness of CBFRAs, allowing a reduction of the computational burden and an increase of computational efficiency when compared with standard FE simulations. It is finally shown how the MFH methods proposed are more accurate than existing methods available in literature.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"365 ","pages":"Article 119197"},"PeriodicalIF":6.3,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838929","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":"Spiderweb-inspired flexible mesh composites with excellent impact resistance, sensing performance and flame retardancy","authors":"Aolin Yang,&nbsp;Lele Liu,&nbsp;Chaoyu Chen,&nbsp;Zhijia Dong,&nbsp;Pibo Ma","doi":"10.1016/j.compstruct.2025.119187","DOIUrl":"10.1016/j.compstruct.2025.119187","url":null,"abstract":"<div><div>Mesh materials, due to their unique structure and excellent performance, are widely used, especially spiderweb structural materials, which have garnered significant attention. Besides requiring lightweight, flexibility, and excellent mechanical performance, intelligence and multifunctionality are also crucial development directions for mesh. In this study, we propose a novel spiderweb-inspired mesh composite (MSTFs/mesh) with excellent impact resistance, sensing performance and flame retardancy. The composite features a knotless mesh with a spiderweb-like topology, fabricated through braiding and knitting techniques, serving as the structural body, complemented by functional layers of shear thickening fluid containing multi-walled carbon nanotubes. Yarn pull-out and bursting tests revealed that the maximum resistance forces of the MSTFs/mesh are 144 N and 3516 N respectively, which are 11.2 times and 1.58 times higher than those of the neat mesh. The topology of the spider web and the shear thickening fluid provide the mesh composite with outstanding impact resistance, capable of withstanding an impact energy of 50 J. The incorporation of MWCNTs imparts sensing capabilities to the composite. Furthermore, the mesh composite retains its structural integrity after 40 s of burning on an alcohol lamp flame, demonstrating excellent flame retardancy and thermal stability. This advanced multifunctional mesh composite offers valuable insights into the design of next-generation mesh materials, promising extensive applications in protection engineering and beyond.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"365 ","pages":"Article 119187"},"PeriodicalIF":6.3,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143816820","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":"Homogeneous and functionally graded piezoelectric structure analysis with finite block method","authors":"X.B. Yan ,&nbsp;S.M. Liu ,&nbsp;P.H. Wen ,&nbsp;J. Sladek ,&nbsp;V. Sladek","doi":"10.1016/j.compstruct.2025.119188","DOIUrl":"10.1016/j.compstruct.2025.119188","url":null,"abstract":"<div><div>In this paper, the functionally graded structures are investigated by using the partial differential matrix of the finite block method with Lagrange polynomial interpolation. A discrete scheme is proposed first time to solve the two- and three-dimensional piezoelectric coupling problems. The nodal values of the displacements and electric potential are evaluated by solving a set of linear algebraic equations established from the governing equations and boundary conditions of the piezoelectric problems. The dynamic responses of the layered piezoelectric problems are solved either in Laplace transform domain with Durbin’s inverse technique or in time domain Houbolt method. Several numerical examples are given to investigate 2D homogeneous and functionally graded material structures vibration under actuator voltage. In addition, the influence of three kinds of boundary condition on the maximum deflection is also studied in order to control the piezoelectric integrated structure by applying actuator voltage to the upper and lower surfaces of the piezoelectric layer. Three-dimensional static and dynamic analysis in piezoelectric materials are also carried out in this paper. By comparing with both analytical solutions and numerical solutions by COMSOL, the results show high accuracy and convergence.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"365 ","pages":"Article 119188"},"PeriodicalIF":6.3,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828154","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":"Evaluating the elastic wave speed in heterogeneous materials and structures: A concurrent multiscale modeling approach","authors":"Heng Zhang ,&nbsp;Ang Zhao ,&nbsp;Zhe Liu ,&nbsp;Lu Meng ,&nbsp;Liuyang Zhang ,&nbsp;Pei Li","doi":"10.1016/j.compstruct.2025.119193","DOIUrl":"10.1016/j.compstruct.2025.119193","url":null,"abstract":"<div><div>Elastic wave speed is significant for studying materials’ dynamic behavior, and usually evaluated using the classical equations <span><math><mrow><mi>c</mi><mo>=</mo><msqrt><mrow><mi>E</mi><mo>/</mo><mi>ρ</mi></mrow></msqrt></mrow></math></span> or <span><math><mrow><mi>c</mi><mo>=</mo><msqrt><mrow><mfenced><mrow><mi>λ</mi><mo>+</mo><mn>2</mn><mi>μ</mi></mrow></mfenced><mo>/</mo><mi>ρ</mi></mrow></msqrt></mrow></math></span> especially for homogeneous isotropic materials. However, these analytical methods may not be suitable for heterogeneous materials and structures, while the direct numerical simulation (DNS) using finite element method requires a huge number of elements which leads to unmanageable computational cost. To this end, the Direct Finite Element Square (DFE²) method was used to simulate the elastic wave propagation in heterogeneous materials and structures, whereby it was proposed that both <em>meso</em>-scale stress and density should be scaled in the DFE² method to accurately predict the wave transmission time in heterogeneous materials. Also, it was found that DFE² method generally predicts a higher elastic wave speed due to the unrealistic wave transmission in the macro-element at the impact end, and the error can be reduced by refining the macro-elements. Simulation of several heterogenous materials such as fiber reinforced polymer composites, anisotropic cellular structures and density-gradient porous panels show that the DFE² method can capture the elastic wave speed in 2D heterogeneous materials and structures more accurately compared to classical estimation equations, whereby the DNS result was used as reference. Moreover, the DFE² method exhibits a high computational efficiency, i.e., more than 10 times higher than DNS, and can be easily implemented using available features in commercial software. This implies the valuable potential of the DFE² method in evaluating the elastic wave speed in heterogeneous materials and structures.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"365 ","pages":"Article 119193"},"PeriodicalIF":6.3,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143826060","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}