Composite Structures最新文献

{"title":"Frequency-dependent elastic wave filtration and separation by hexagonal topological phononic crystals","authors":"Guifeng Wang ,&nbsp;Yanhong Guan ,&nbsp;Zhenyu Chen ,&nbsp;Zhenhuan Zhou ,&nbsp;Xinshen Xu ,&nbsp;C.W. Lim ,&nbsp;Weiqiu Chen","doi":"10.1016/j.compstruct.2025.119289","DOIUrl":"10.1016/j.compstruct.2025.119289","url":null,"abstract":"<div><div>Ascribe to the research significance and great application potential of elastic wave manipulation, the topological phononic crystals with peculiar functions in robust waveguiding have attracted enormous research attention. High-dimensional, higher-order, multifunctional, intelligent, and multi-frequency topological structures are expected to be a prominent research focus in the coming decades, while grand challenges still exist in designing such devices. In this regard, this paper presents a hexagonal lattice structure with six internally connected cylinders. Utilizing the accidental Dirac cones, the separate control of closing/opening and topological phases of three bandgaps at different frequencies is achieved. The subsequent parametric analyses reveal the whole picture of valley Chern numbers variation in the parametric space, which helps summarize the design principles of frequency-dependent topologically protected interface modes. Several superstructures consisting of two types of unitcells are then constructed to achieve the waveguiding in a straight path and frequency-dependent wave filtration. Consequently, introducing more types of unitcells can form interfaces that support waveguiding at different frequencies, leading to the realization of frequency-dependent wave separation and demultiplex. The presented work in this paper not only offers a novel design for multi-frequency wave separation and filtration but also inspires further explorations in multi-functional integrated elastic wave processors.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"368 ","pages":"Article 119289"},"PeriodicalIF":6.3,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144108154","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":"Reconfigurable metamaterial honeycomb sandwich panels based on embedded tube Helmholtz resonators","authors":"Hui Wang ,&nbsp;Yaxiang Sun ,&nbsp;Xin Lan ,&nbsp;Hanxing Zhao ,&nbsp;Yong-Hua Yu ,&nbsp;Weichun Huang ,&nbsp;Yanju Liu ,&nbsp;Jingsong Leng","doi":"10.1016/j.compstruct.2025.119290","DOIUrl":"10.1016/j.compstruct.2025.119290","url":null,"abstract":"<div><div>Acoustic metamaterials depend on the geometry and spatial distribution of their microstructure, which is difficult to change without an external mechanical load after manufacturing, which limits their application in complex mechanical environments. Based on the sound insulation mechanism of traditional Helmholtz resonators, the resonant frequency of embedded tube Helmholtz resonators is theoretically deduced in this paper, and the regulatory relationship between the structural parameters and their acoustic characteristics (transmission loss) is derived. Then, using the shape memory effect of the shape memory polymers (SMPs), reconfigurable embedded tube Helmholtz resonators with various temporary configurations are designed. On this basis, reconfigurable metamaterial honeycomb sandwich panels with reconfigurable microstructures and adjustable macroacoustic performance are further constructed. Through simulations and experiments, the excellent sound insulation performance of reconfigurable metamaterial honeycomb sandwich panels in different configurations is verified. In addition, the sound insulation performance of honeycomb sandwich panels with the same arc length but different wave numbers and different bottom configurations is analysed in detail. This study plays an important role in guiding the application of acoustic metamaterials in complex mechanical environments.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"368 ","pages":"Article 119290"},"PeriodicalIF":6.3,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125263","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 water absorption on the mechanical and morphological properties of date palm leaf fiber-reinforced polymer composites","authors":"Elsadig Mahdi ,&nbsp;Daniel R.H. Ochoa ,&nbsp;Ashkan Vaziri ,&nbsp;Aswani K. Bandaru ,&nbsp;Pavan K.A.V. Kumar ,&nbsp;Aamir Dean","doi":"10.1016/j.compstruct.2025.119286","DOIUrl":"10.1016/j.compstruct.2025.119286","url":null,"abstract":"<div><div>The growing demand for sustainable and biodegradable materials has led to increasing interest in using natural fibers as reinforcements in polymer composites. Among these, date palm leaf fibers (DPLFs), an abundant agricultural byproduct in the Middle East, show promise due to their favorable mechanical characteristics. This study investigates the effects of water absorption on the mechanical and morphological properties of DPLF-reinforced polymer (DPLFRP) composites to assess their viability in moisture-prone environments. Five types of DPLFs (Nabtat-seyf, Sultana, Barhee, Sukkary, and Khalasah) were extracted, characterized morphologically using scanning electron microscopy (SEM), and fabricated into unidirectional epoxy-based laminates via hand layup. Mechanical performance was assessed through tensile testing before and after 48 hrs of water immersion. Morphological changes and water uptake behavior were also examined. The results show that Nabtat-seyf exhibited the highest tensile strength (100.58 ± 7.95 MPa) and modulus (6.16 ± 0.85 GPa) among the DPLFs. Water absorption led to a reduction in tensile strength and modulus of DPLFRP composites by 39–47% and 21–32%, respectively. SEM analysis revealed microstructural damage mechanisms such as fiber–matrix debonding, fiber swelling, and matrix cracking. The specific tensile modulus and strength also declined significantly with increased moisture content. These findings suggest that while DPLFs, especially Nabtat-seyf, have high potential as reinforcement in biocomposites, water absorption presents a major challenge. Applications include automotive interior components, construction panels, and low-load structural elements, provided moisture barriers or fiber treatments are applied for durability enhancement.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"368 ","pages":"Article 119286"},"PeriodicalIF":6.3,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090700","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 FFT-based micromechanical modeling approach for the fracture behavior of a composite core in metal sandwich plates using a cohesive zone model","authors":"Felix Bödeker ,&nbsp;Anders Biel ,&nbsp;Ramin Moshfegh ,&nbsp;Stephan Marzi","doi":"10.1016/j.compstruct.2025.119231","DOIUrl":"10.1016/j.compstruct.2025.119231","url":null,"abstract":"<div><div>Hybrix^TM sandwich plates (Lamera AB, Gothenburg, Sweden) with metal face sheets could replace standard metal plates in many lightweight applications. Their composite core, which is crucial for the structural performance and the fracture behavior of the whole plate, consists of polymer fibers and binder, and a large amount of porosity. In this work, a novel micromechanical modeling approach for the fracture behavior of the composite core is presented, which could allow for a faster and improved design process for novel configurations of the plates. The modeling approach involves a novel method for the generation of virtual models for the complex microstructure of the core and our recently developed theoretical framework of an FFT-based computational homogenization scheme for cohesive zones. Furthermore, the parameters of the elastic–plastic material model including a non-local, ductile damage model were identified using microindentation experiments and mode I tests (Double Cantilever Beam). The novel modeling approach, along with the FFT-based homogenization scheme for cohesive zones, was also experimentally validated using mode III tests (Split Cantilever Beam) and a corresponding Finite Element simulation.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"368 ","pages":"Article 119231"},"PeriodicalIF":6.3,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134056","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":"Toughening mechanisms of fiber-reinforced composites: A micromechanical heterogeneous peridynamic model","authors":"Weikang Sun ,&nbsp;J.X. Liew ,&nbsp;Mingyang Gong ,&nbsp;Binbin Yin","doi":"10.1016/j.compstruct.2025.119285","DOIUrl":"10.1016/j.compstruct.2025.119285","url":null,"abstract":"<div><div>Exploring strategies for toughening the fiber-reinforced composites (FRCs) is of significant interest for boosting their high-performance applications. A novel micromechanical peridynamic (PD) model incorporating five types of non-local interactions was proposed to unravel the toughening mechanisms for laminated composite materials. This PD model was validated by three examples including the prediction of off-axis modulus of laminates, the cracking of center-cracked laminates and the compact tension test. Diverse experiment-consistent crack patterns were captured. The effects of the mechanical properties of fibers, matrix, their interface and the interlayer interface on the force–displacement curves obtained from compact tension tests were systematically studied. It was found that the major load carrier is the fiber, follow by the fiber–matrix interface, the interlayer interface and the matrix. Results show that the stiffening and strengthening of fiber–matrix interface and interlayer interface can greatly enhance the fracture toughness of the composites. This toughening is resulted from a synergetic improvement of load bearing capacity in the interlayer bonds, fiber–matrix bonds, the fiber bonds and matrix bonds. To leverage this synergetic effect, interface and interlayer enhancement strategies, e.g., brick–mortar structure and the Bouligand structure appeared in biological materials, are highly recommended for designing FRCs with improved toughness.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"368 ","pages":"Article 119285"},"PeriodicalIF":6.3,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144108000","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":"Optimal design approach of interpenetrating pre-stressed metal-ceramic composites based on deep learning neural network","authors":"Kun Liu ,&nbsp;Xin Lai ,&nbsp;Lisheng Liu ,&nbsp;Jinyong Zhang ,&nbsp;Yifei Liu","doi":"10.1016/j.compstruct.2025.119275","DOIUrl":"10.1016/j.compstruct.2025.119275","url":null,"abstract":"<div><div>In this work, we proposed a new pre-stressed metal-ceramic interpenetrating structure to improve the apparent tensile strength of ceramic. In addition, an optimization design framework was constructed by integrating machine learning and gradient descent optimization algorithm for the optimization design of ceramic interpenetrating composites. The optimized metal-ceramic interpenetrating structure can achieve a balance of the stress state of the ceramic phase between intensity and distribution by ingeniously control the confinement and topology of the metal phase. More specifically, the surrogate model we constructed through deep neural network (DNN) can efficiently predict the relationship between the structure and its stress state. The final result obtained can achieve excellent pre-stress effect while making the structure lightweight.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"368 ","pages":"Article 119275"},"PeriodicalIF":6.3,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144108158","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 micromechanical solving method integrating the physics-informed neural network with the self-consistent cluster analysis method for composites laminate","authors":"Wenlong Hu ,&nbsp;Hui Cheng ,&nbsp;Caoyang Wang ,&nbsp;Liang He ,&nbsp;Kaifu Zhang ,&nbsp;Yuan Li ,&nbsp;Biao Liang","doi":"10.1016/j.compstruct.2025.119264","DOIUrl":"10.1016/j.compstruct.2025.119264","url":null,"abstract":"<div><div>The concurrent multiscale method enables to obtain both the macro and micro deformations simultaneously, making it a valuable approach for analyzing the inherent multiscale deformations of carbon fiber reinforced polymer composites (CFRPs) laminate. However, the high computational cost resulting from the unidirectional representative volume element (UD-RVE) of CFRPs laminate, is one of the biggest obstacles hindering the concurrent multiscale method widely applied for CFRPs laminate in practice. To address this issue, this work proposed a solving method, which integrated the self-consistent cluster analysis (SCA) and the physics-informed neural network (PINN), to efficiently and accurately compute the nonlinear mechanical response of UD-RVE. The SCA method was used to speed up the micro mechanics solution of UD-RVE by means of model order reduction, while the PINN was for accelerating the solution of elastoplastic response of resin matrix. To validate the proposed method, simulations from SCA-PINN were compared with the direct numerical simulations (DNS). The results show that the proposed method can accurately capture the nonlinear mechanical responses and strain distributions subjected to various loads, and its computational efficiency is about 4754 times faster than the FEM, and 9 times faster than the traditional SCA. The proposed efficient approach provides a valuable tool for engineering applications of concurrent multiscale methods.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"368 ","pages":"Article 119264"},"PeriodicalIF":6.3,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144108160","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":"Probabilistic fatigue life prediction for composites based on Bayesian optimization and stochastic stiffness degradation","authors":"Yuhao Lian ,&nbsp;Tangzhen Wu ,&nbsp;Fuqiang Wu ,&nbsp;Yalin Han ,&nbsp;Qijun Zhao","doi":"10.1016/j.compstruct.2025.119283","DOIUrl":"10.1016/j.compstruct.2025.119283","url":null,"abstract":"<div><div>The mechanical properties of the composites exhibit progressive degradation accompanied by significant stochasticity as cycles increase during fatigue loadings. Potential fatigue life characteristics from material degradation uncertainty were investigated to reduce the error of residual life prediction. A physics-data-driven fatigue life prediction approach without a pre-prepared database for composite laminate has been established based on the proposed stochastic stiffness degradation model and Bayesian optimization. Optimization was utilized to extract disentangled latent stochastic features in stiffness degradation to represent the error of the damage accumulation model during fatigue life prediction. The established prediction model has been experimentally verified using 102 laminate specimens with several layups and materials, and the results show that the predicted life with different proportions of stiffness data input is in good agreement with experimental ones.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"368 ","pages":"Article 119283"},"PeriodicalIF":6.3,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144108153","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 life prediction of self-sensing hybrid FRP composites via electrical resistance monitoring and LSTM neural network","authors":"Luke B. Demo ,&nbsp;Tymon B. Nieduzak ,&nbsp;Maria Q. Feng ,&nbsp;Venkat R. Aitharaju","doi":"10.1016/j.compstruct.2025.119238","DOIUrl":"10.1016/j.compstruct.2025.119238","url":null,"abstract":"<div><div>Fiber-reinforced polymer (FRP) composites are widely used in aerospace, automotive, and civil infrastructure applications due to their high strength-to-weight ratio and durability. Nevertheless, predicting fatigue life remains challenging due to the material’s complex failure mechanisms. This paper presents a novel approach to real-time fatigue life prediction in self-sensing hybrid FRP composites through electrical resistance monitoring. Carbon fiber sensor tows were embedded in a hybrid composite material to enable real-time damage detection. A long short-term memory (LSTM) neural network was implemented to predict the remaining fatigue life using only the resistance data, and importantly, without the need for stress or strain inputs. Fatigue tests were conducted, with experimental results indicating a strong correlation between resistance and cycles to failure. Empirical data was utilized to train the LSTM neural network, with the model accurately predicting the remaining fatigue life across various stress levels. Moreover, the carbon fiber sensor tows provided damage early warning, indicated by a sharp increase in resistance before failure. This study highlights the potential for a simple, low-cost structural health monitoring system with the ability to significantly extend service life through accurate fatigue life prediction.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"367 ","pages":"Article 119238"},"PeriodicalIF":6.3,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144108210","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":"AntiVibCorkSTF: eco-friendly vibration attenuator using cork and shear thickening fluids","authors":"Miguel Montenegro ,&nbsp;Rui A.S. Moreira ,&nbsp;Laura Campo-Deaño ,&nbsp;Francisco J. Galindo-Rosales","doi":"10.1016/j.compstruct.2025.119277","DOIUrl":"10.1016/j.compstruct.2025.119277","url":null,"abstract":"<div><div>Vibration is a common issue in daily life, often caused by machine operation, and can lead to material fatigue, accelerated wear of components, noise, and loosening of connection mechanisms. In industrial processes, excessive vibration can affect machining precision and human comfort. Most conventional damping materials, such as viscoelastic pads or sheets, are not eco-friendly and have limited effectiveness under varying conditions, e.g., frequency and temperature dependencies. Cork, a natural cellular material, exhibits inherent damping capabilities, making it a sustainable alternative. This study develops a tuneable nonlinear energy-dissipating material, specifically a vibration attenuator constructed from environmentally friendly composite materials (AntiVibCorkSTF). The design integrates micro-agglomerated cork with an eco-friendly shear thickening fluid (STF), formulated as a dense suspension of precipitated calcium carbonate in glycerol. Three different composite configurations were prepared and tested: (i) an STF-filled cork composite with an engraved microfluidic pattern, (ii) an identical pattern engraved in the agglomerated cork without the STF, and (iii) a pristine cork layer core without engraving. The experimental study followed an Experimental Modal Analysis (EMA) procedure, where dynamic loading was applied using an electrodynamic shaker, and velocity response was measured via laser vibrometry. Modal parameters, including natural frequencies, mode shapes, and damping coefficients, were evaluated from Frequency Response Functions (Mobility). Results indicate that STF-filled composites exhibit higher natural frequencies than their non-STF counterparts, despite the additional mass introduced by the fluid. This behaviour suggests a stiffening effect attributed to the non-Newtonian rheology of STFs, leading to improved flexural rigidity. These findings underscore the potential of AntiVibCorkSTF composites for both mechanical and acoustic vibration applications, while also highlighting the challenges in accurately predicting their dynamic response due to the lack of a constitutive model for STFs.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"368 ","pages":"Article 119277"},"PeriodicalIF":6.3,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144108161","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}