Composite Structures最新文献

{"title":"Time-domain topology optimization of viscoelastic composites for enhanced energy dissipation in macrostructures","authors":"Gyeong-Chan Eom,&nbsp;Kyeong-Soo Yun","doi":"10.1016/j.compstruct.2025.119383","DOIUrl":"10.1016/j.compstruct.2025.119383","url":null,"abstract":"<div><div>This paper proposes a time-domain topology optimization method aimed at maximizing the energy-dissipation performance of viscoelastic composite materials while maintaining their structural stiffness. Viscoelastic materials are widely used for vibration damping in various engineering fields. However, materials with high damping characteristics typically exhibit low stiffness. To overcome this limitation and enhance the damping performance, a composite material that combines high-stiffness materials with viscoelastic materials, was designed. A time-domain topology optimization approach was employed to account for the interaction between the microstructural design of viscoelastic composites and the macroscopic structural behavior under time-dependent loading. This approach enabled the design of optimal microstructures tailored to specific macroscopic structural responses. The effective properties of the composites were determined based on the homogenization theory, and a systematic optimization framework was developed to achieve a balance between energy dissipation and stiffness in the macrostructures. The proposed method was validated through numerical examples, demonstrating the effectiveness of the optimal designs for enhancing the damping performance of viscoelastic composites.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"370 ","pages":"Article 119383"},"PeriodicalIF":6.3,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322672","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":"Inverse design of NiTi alloy-based chiral metamaterials with multi-level rotational capabilities for reusable high-performance impact absorption","authors":"Xuyang Li ,&nbsp;Xiaonan Han ,&nbsp;Yong Qin ,&nbsp;Lianfa Sun ,&nbsp;Xiaogang Guo","doi":"10.1016/j.compstruct.2025.119387","DOIUrl":"10.1016/j.compstruct.2025.119387","url":null,"abstract":"<div><div>High-performance impact-absorbing structures that combine exceptional energy absorption capabilities with high reusability represent a significant advancement in protective engineering. In this work, we present the development of three-dimensional (3D) chiral metamaterials and a sophisticated inverse design methodology specifically engineered to achieve tailored impact-absorbing properties. By harnessing the multi-level rotational mechanisms—encompassing localized and global beam rotations, as well as the overall structural rotation—during compression, coupled with the shape memory effect of nickel-titanium (NiTi) alloy, the designed structures demonstrate outstanding reusability in energy absorption. Utilizing the AI-driven approach that integrates machine learning with genetic algorithms, we successfully engineered six distinct structures with plateau stresses ranging from 0.025 MPa to 0.7 MPa. Uniaxial compression tests revealed excellent alignment with finite element analysis (FEA) predictions, exhibiting an average deviation of only 8.75 % from the target stress–strain profiles, thereby validating the robustness and precision of our inverse design methodology. Notably, the structure with a plateau stress of 0.05 MPa achieved an exceptional shape recovery ratio of 97.9 % following 80 % effective compression, underscoring its superior reusability. These findings underscore the transformative potential of 3D chiral metamaterials with multi-level rotational capabilities and their inverse design strategy in advancing the development of reusable, high-performance impact-absorbing structures.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"370 ","pages":"Article 119387"},"PeriodicalIF":6.3,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297742","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 lay-up angle design for balancing impact resistance and energy absorption in filament-wound CFRP tubular structures","authors":"Jie Xiao ,&nbsp;Lele Cheng ,&nbsp;Dongxu Kang ,&nbsp;Ruize Gao ,&nbsp;Yinle Qin ,&nbsp;Jianxin Zhang ,&nbsp;Zeyu Sun","doi":"10.1016/j.compstruct.2025.119381","DOIUrl":"10.1016/j.compstruct.2025.119381","url":null,"abstract":"<div><div>This study establishes a design framework for optimizing lay-up angles in filament-wound CFRP tubular structures under low-velocity impact (15 J). A systematic experimental–numerical approach integrating drop hammer tests, finite element analysis (FEA), and micro-CT imaging was employed to investigate five lay-up configurations (±15°–±65°). Key findings reveal a trade-off between impact resistance and energy absorption: ±45° lay-ups (moderate-angle regime) achieve balanced performance (80.2 % energy absorption, 29.4 % residual deformation), while ± 65° configurations prioritize energy dissipation (87.6 % absorption) at the cost of increased deformation. FEA-validated micro-CT imaging elucidates damage mechanisms: shallow-angle regimes (&lt;±30°) induce resin-dominated delamination, whereas steep-angle regimes (&gt;±60°) promote fiber fracture through shear-stress redistribution. The study provides a quantitative basis for angle-specific design in aerospace and automotive applications requiring multi-objective performance optimization.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"370 ","pages":"Article 119381"},"PeriodicalIF":6.3,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144312502","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":"3D printed bistable composite lattice shells with tailorable coiled geometries","authors":"Nicholas Elderfield ,&nbsp;Aghna Mukherjee ,&nbsp;Paolo Ermanni ,&nbsp;Joanna C.H. Wong","doi":"10.1016/j.compstruct.2025.119332","DOIUrl":"10.1016/j.compstruct.2025.119332","url":null,"abstract":"<div><div>This investigation presents, to the authors’ best knowledge, the first 3D printed continuous fiber-reinforced polymer composite deployable booms. The precise material placement capabilities of the fused filament fabrication (FFF) process are leveraged to produce cylindrical bistable slit tube booms with lattice architectures. The influences of fiber angles, lattice density, and initial shell curvature on the existence and form of stable coiled configurations as well as flexural rigidity properties are investigated. A computational procedure for automatically generating finite element models directly from material deposition paths is presented, with predicted shell behaviors showing strong agreement with experimental results using both homogenization and full-scale modeling approaches. Lattice shell architectures are revealed to exhibit higher flexural rigidity properties than continuum architectures on an equal-mass basis. Finally, bistable slit tube booms that can coil into unique stable configurations via the tailoring of material deposition paths are demonstrated.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"370 ","pages":"Article 119332"},"PeriodicalIF":6.3,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144312504","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":"FRCM confinement of concrete columns: a review of strength and ductility enhancements","authors":"Zeinah Elnassar ,&nbsp;Farid Abed ,&nbsp;Ahmed El Refai ,&nbsp;Tamer El-Maaddawy","doi":"10.1016/j.compstruct.2025.119389","DOIUrl":"10.1016/j.compstruct.2025.119389","url":null,"abstract":"<div><div>Fiber reinforced cementitious matrix (FRCM) systems have recently emerged as a promising method for strengthening concrete columns, offering notable gains in strength and ductility due to their mechanical performance and compatibility with concrete substrates. This paper presents a comprehensive review of the behavior of concrete compression elements confined with FRCM systems, based on data from 66 experimental studies – 36 on plain concrete (PC) and 30 on reinforced concrete (RC) columns – covering over 1036 PC and 294 RC tests.</div><div>Specimens were categorized by slenderness, loading conditions, cross-sectional shape, concrete type, FRCM configuration, and reinforcement ratio. The analysis highlights the improved capacity and ductility of FRCM-confined columns under various conditions, including seismic and fire exposure. Among the fabrics studied, polyphenylene benzobisoxazole (PBO) fabric showed superior bonding and performance, while FRCM systems incorporating modified high-strength matrices delivered outstanding strength and deformation capacity. Key parameters such as concrete compressive strength, number of FRCM layers, cross-sectional geometry, and mortar properties were found to significantly influence confinement effectiveness. Columns with higher concrete strength or noncircular sections exhibited reduced benefits, while smaller or lower-strength columns demonstrated greater improvements. In addition, the review critically examines existing design methods and predictive equations for FRCM-confined columns. Finally, directions for future research are outlined, emphasizing key parameters that require further investigation to enhance the reliability and efficiency of FRCM systems in structural strengthening applications</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"370 ","pages":"Article 119389"},"PeriodicalIF":6.3,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144291279","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":"Experimental and numerical analyses of the interaction between rigid non-penetrating projectiles, soft and hard tissue simulants and composite ballistic protection","authors":"Samuel Gómez-Garraza ,&nbsp;Mario Álvarez-Blanco ,&nbsp;Diego Infante-García ,&nbsp;Beatriz Miguélez ,&nbsp;José Antonio Loya ,&nbsp;Miguel Marco","doi":"10.1016/j.compstruct.2025.119386","DOIUrl":"10.1016/j.compstruct.2025.119386","url":null,"abstract":"<div><div>The study of ballistic personal protections often only focuses on the mechanical response and ballistic limits of the armor considered. However, understanding the armor-carrier interaction under dynamic conditions remains underexplored. This research analyzes non-penetrating ballistic impacts on gelatin samples involving multi-ply composite ballistic protection panels, focusing on biomechanical damage.</div><div>For this purpose, ballistic gelatin is presented as a reliable soft tissue simulant and thoroughly examined under non-penetrating ballistic impact conditions. The methodology includes two experimental approaches: (1) low-velocity impact tests using rigid projectiles to isolate gelatin’s mechanical behavior and (2) high-velocity impact tests with steel spherical projectiles, involving additionally ballistic protection panels and a simplified bone surrogate as a hard tissue simulant.</div><div>Due to the complexity of experimentally assessing the dynamic interaction between soft and hard tissue simulants, protection, and projectiles, an explicit finite element model has been developed. These simulations incorporate different damage models in composite protection and bone surrogate to accurately replicate the experimental tests. In addition, a proposed visco-hyperelastic constitutive model for ballistic gelatin is validated, generating a powerful predictive tool for evaluating ballistic protection and biomechanical damage.</div><div>This work provides a comprehensive study of the behind armor blunt trauma and introduces an experimental methodology to quantify the mechanical response of ballistic gelatin and hard tissue simulants under non-penetrating ballistic impacts. It addresses a key gap in modeling soft tissue simulants under high-energy conditions and validates the corresponding visco-hyperelastic constitutive model. Findings highlight the importance of considering hard tissue effects when evaluating composite protection performance, which has not been previously addressed in literature. This work proposes an alternative evaluation framework to the assessment of advanced armor and biomechanical phenomena estimation. We further provide a deeper biomechanical insight in comparison with existing standards, bridging the gap between multi-layered composite protection and the human biomechanical response.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"370 ","pages":"Article 119386"},"PeriodicalIF":6.3,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144312503","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":"Morphology-centric computational simulation for predicting coupled-field responses of graphene nanoplatelet/barium titanate nanowire/polydimethylsiloxane nanocomposites","authors":"Alireza Moradi ,&nbsp;Reza Ansari ,&nbsp;Mohammad Kazem Hassanzadeh-Aghdam ,&nbsp;Saeid Sahmani","doi":"10.1016/j.compstruct.2025.119385","DOIUrl":"10.1016/j.compstruct.2025.119385","url":null,"abstract":"<div><div>Integrating graphene nanoplatelets (GNPs) and barium titanate nanowires (BTNs) into the polymer enables the formation of a hybrid system, which drives notable advancements: enhancing the interfacial compatibility of nanofillers with the polymer and alleviating defect-related drawbacks; preserving the structural integrity of wire-shaped nanofillers through the stabilizing role of platelet-shaped nanofillers; extending the functional applicability of polymer nanocomposites, particularly in multi-physics domains; etc. This cutting-edge research is directed towards developing a micromechanics-based finite element framework for investigating the coupled-field interactions in GNP/BTN/polydimethylsiloxane (PDMS) piezoelectric nanocomposites. A multi-step stochastic-iterative computational algorithm is employed to generate representative volume elements (RVEs) of this tri-phase system, addressing the key morphological aspects of nanofillers. This algorithm also covers a variety of nanofiller dispersal scenarios, spanning well-dispersed, agglomerated, and hybrid configurations. Parameter-driven analyses underscore the beneficial effects of augmenting the loading of well-dispersed nanofillers, deploying slim GNPs and elongated BTNs, and maintaining proper alignment. The findings reveal that when nanofillers accumulate and form agglomerates, GNP clusters yield a more considerable impact on the degradation of the elastic modulus and thermal expansion coefficient, whereas BTN clusters predominantly influence the piezoelectric coefficient. In addition, the advantageous role of cluster fragmentation is detected universally.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"370 ","pages":"Article 119385"},"PeriodicalIF":6.3,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144262717","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":"Experimental investigation of dynamic behaviors and energy absorption of novel personal protective composites under repeated impacts","authors":"Jiangrui Qian ,&nbsp;Yun Su ,&nbsp;Jun Li","doi":"10.1016/j.compstruct.2025.119382","DOIUrl":"10.1016/j.compstruct.2025.119382","url":null,"abstract":"<div><div>Explosion accident posing severe threats to human. Current research primarily focuses on engineering protective materials, with limited attention to those for human protection. In this study, personal protective composites with a unique structure were developed by incorporating carbon fiber laminates, artificial cartilage foam, and metallic springs. Considering that foamed material plays a major role in resisting impact, the knowledge of its repeated impacts becomes a key design parameter to ensure impact resistance and long-term stability of the structure. In view of this, the present work investigated the dynamic behaviors and energy absorption mechanisms of composites under repeated impacts, considering the effects of composite structure, including wire and external diameters, and providing a meaningful comparison with traditional protective materials. The results showed that designed composites demonstrated superior impact resistance and durability. Increasing the wire diameter of the composites reduced deformation, with energy being dissipated through material failure, leading to fewer impact cycles. Increasing the external diameter of the composites effectively enhanced their specific energy absorption. Moreover, the changes in the pulse signal during the Split-Hopkinson Pressure Bar (SHPB) test were found to characterize the internal destruction and damage accumulation within the composites during repeated impact. The results showed the rate of peak reflected strain change gradually increased as impact damage accumulation. These findings provide both a theoretical basis and experimental support for the design and durability evaluation of personal protective composites.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"370 ","pages":"Article 119382"},"PeriodicalIF":6.3,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144271105","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":"Inverse problem solution and optimization in the vibration analysis of nanocomposite cylindrical shell using L-BFGS-B algorithm","authors":"Duc Tien Nguyen ,&nbsp;Nguyen Cong Tan ,&nbsp;Darlington Yawson ,&nbsp;Dinh Gia Ninh","doi":"10.1016/j.compstruct.2025.119309","DOIUrl":"10.1016/j.compstruct.2025.119309","url":null,"abstract":"<div><div>Functionally graded carbon nanotube-reinforced composite (FG-CNTRC) cylindrical shells are crucial in aerospace, marine, and energy industries, where lightweight structures with superior mechanical and thermal properties are essential. This study investigates both the forward and inverse problems of FG-CNTRC cylindrical shells subjected to lateral loading, providing a systematic approach to analyze vibrational responses and optimize design. In the forward problem, the fundamental frequencies and nonlinear displacement–time characteristics are analyzed using the theory of elasticity and von Kármán nonlinearity. The effects of shell thickness, CNT distribution patterns, CNT volume fraction, and applied forces on displacement are explored to enhance structural performance. The inverse problem focuses on identifying external forces responsible for specific vibrational responses and optimizing shell thickness to achieve target displacement performance. The optimization employs the Limited-memory Broyden–Fletcher–Goldfarb–Shanno with Box constraints (L-BFGS-B) algorithm, integrating noise handling and regularization techniques to ensure robustness. Model validation is conducted by comparing computed frequencies with existing studies, demonstrating accuracy and practical relevance. The proposed approach provides valuable insights and reliable design tools for FG-CNTRC shells, contributing to improved efficiency and performance in advanced engineering applications.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"370 ","pages":"Article 119309"},"PeriodicalIF":6.3,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297743","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":"Influence of fibre undulation on the biaxial behaviour of filament-wound FRP tubes in concrete-filled FRP tubes","authors":"Jia-Qi Yang ,&nbsp;Xinyu Li ,&nbsp;Zhiyuan Li ,&nbsp;Peng Feng ,&nbsp;Lili Wu","doi":"10.1016/j.compstruct.2025.119388","DOIUrl":"10.1016/j.compstruct.2025.119388","url":null,"abstract":"<div><div>Filament-wound FRP tubes are extensively utilized in various FRP-concrete composite structures, such as concrete-filled FRP tubes (CFFT). In CFFTs, the FRP tubes are subjected to axial compression and hoop tension. This biaxial stress state diminishes the confining effect. Owing to the winding procedure, the fibre bundles in the tube wall fluctuate, and the <em>meso</em>-scale fibre architecture can further impact the mechanical properties of the composites, rendering the classical lamination theory (CLT) insufficient in predicting the biaxial tube behaviour. This study presents a <em>meso</em>-scale finite element (FE) analysis on the repeated unit cells (RUCs) of the tube wall. With the RUC results, the parameters of CLT analysis are modified. The accuracy of the analysis-oriented model for FRP-confined concrete is improved by the modified CLT parameters. Based on the refined analysis-oriented model, a series of factors for modifying the hoop tensile test results are put forward for engineering design.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"370 ","pages":"Article 119388"},"PeriodicalIF":6.3,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144271195","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}