Composite Structures最新文献_第2页

Nonlocal strain gradient analysis of electro-magneto-thermoelastic curved functionally graded nanobeams- free vibrational study by sinus beam model accounting for normal deformation 电磁热弹性弯曲功能梯度纳米梁的非局部应变梯度分析——考虑法向变形的窦型梁模型的无振动研究

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-08-01 Epub Date: 2026-07-21 DOI: 10.1016/j.compstruct.2026.120691

N. Spoorthi, O. Polit, M. D’Ottavio, S. Kavya, G. Manickam

{"title":"Nonlocal strain gradient analysis of electro-magneto-thermoelastic curved functionally graded nanobeams- free vibrational study by sinus beam model accounting for normal deformation","authors":"N. Spoorthi, O. Polit, M. D’Ottavio, S. Kavya, G. Manickam","doi":"10.1016/j.compstruct.2026.120691","DOIUrl":"10.1016/j.compstruct.2026.120691","url":null,"abstract":"<div><div>The present work focuses on the size-dependent effects on the free vibration behavior of Electro-Magnetic-Thermo-Elastic (EMTE) Functionally Graded (FG) curved nanobeams. This study is conducted using a nonlocal strain-gradient theory and a sinusoidal shear beam theory, including the transverse normal deformation effect. The beam with functionally graded materials, comprising metal and ceramic, is considered to obtain variation in elastic, thermal, electrical, and magnetic properties. The initial strain due to the temperature rise across the beam thickness, evaluated from the heat-conduction formulation, is included. The equilibrium equations derived using Hamilton’s principle are solved for the simply supported beam case, employing Navier’s approach. The natural frequencies obtained from this model are first compared with the available results of the EMTE-FG flat beam. A systematic parametric investigation is made on the dynamic characteristics of the curved EMTE-FG nanobeam by varying nonlocal stress and material length-scale parameters, and considering other physical variables such as beam included angle, the slenderness ratio, material power-law index, and the electrical/magnetic field potential.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"394 ","pages":"Article 120691"},"PeriodicalIF":7.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148645860","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}

引用次数: 0

Explicit design equation for flange local buckling of pultruded FRP beams and columns with I- and box-sections 拉挤玻璃钢工字和箱形截面梁柱法兰局部屈曲的显式设计方程

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-08-01 Epub Date: 2026-07-24 DOI: 10.1016/j.compstruct.2026.120700

TianQiao Liu, Tianye Li, Kent A. Harries, Daniel Cardoso, Weichen Xue, Xiuli Du

{"title":"Explicit design equation for flange local buckling of pultruded FRP beams and columns with I- and box-sections","authors":"TianQiao Liu, Tianye Li, Kent A. Harries, Daniel Cardoso, Weichen Xue, Xiuli Du","doi":"10.1016/j.compstruct.2026.120700","DOIUrl":"10.1016/j.compstruct.2026.120700","url":null,"abstract":"<div><div>Flange local buckling (FLB) is a critical limit state for pultruded FRP (PFRP) beams and columns due to material orthotropy, low elastic moduli, and brittle failure characteristics. Existing mechanics-based models achieve accuracy at the cost of complexity, requiring iterative solutions or rotational restraint coefficients that are difficult to reliably characterize. Design standards – often using inconsistent formulations across member types – are shown to provide predicted capacities that are often excessively conservative or provide inconsistent reliability in design. This study addresses this gap by presenting a simple, unified, explicit design equation for FLB strength of PFRP beams and columns with I- and box-sections. The proposed equation adopts a form analogous to conventional plate buckling solutions, with a single empirical coefficientcalibrated separately for I-beams, I-columns, box-beams, and box-columns against an extensive experimental database comprising 119 tests reported in the literature. Calibration targets a mean <em>experimental-to-predicted</em> ratio of 1.00 for each member type. The unified algebraic form of proposed equation requires only basic geometric dimensions (<em>b</em> and <em>t<sub>f</sub></em>) and readily obtained material properties (<em>E<sub>L</sub></em>, <em>E<sub>T</sub></em>, and <em>v<sub>LT</sub></em>). The proposed equation offers a balance between accuracy and simplicity, providing a robust tool for routine engineering design of PFRP structures.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"394 ","pages":"Article 120700"},"PeriodicalIF":7.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148645864","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}

引用次数: 0

Multi-material dynamic topology optimization for customized wide-bandwidth flexoelectric composite structures 定制宽带宽柔性电复合材料结构的多材料动态拓扑优化

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-08-01 Epub Date: 2026-07-25 DOI: 10.1016/j.compstruct.2026.120690

Xing Chen, Julien Yvonnet, Song Yao

{"title":"Multi-material dynamic topology optimization for customized wide-bandwidth flexoelectric composite structures","authors":"Xing Chen, Julien Yvonnet, Song Yao","doi":"10.1016/j.compstruct.2026.120690","DOIUrl":"10.1016/j.compstruct.2026.120690","url":null,"abstract":"<div><div>To fully exploit the distinct performance advantages of multiple materials and further enhance the customized wide-bandwidth electromechanical coupling factor (ECF) of flexoelectric composite structures, we propose a novel multi-material dynamic topology optimization framework for flexoelectric energy harvesting. The governing fourth-order partial differential equations of flexoelectricity are solved by isogeometric analysis, while the multi-material properties are interpolated through the Discrete Material Optimization scheme. A wide-bandwidth max–min formulation is developed by discretizing the prescribed frequency range into multiple frequency points and aggregating the corresponding ECF responses via the KS function, which provides a smooth approximation of the minimum ECF over the target band. Static compliance constraint is further incorporated to ensure sufficient structural stiffness, suppress disconnected layouts, and, to some extent, stabilize the convergence process induced by the highly nonlinear KS function for the ECFs. Numerical investigations on both single-frequency and wide-bandwidth cases demonstrate that the proposed framework is effective and adaptable for different structural types, material combinations, and frequency-band design strategies. Furthermore, the single mass constraint is shown to be more effective than the multiple volume constraints in identifying favorable material layouts. The proposed framework is capable of achieving both narrow-band high-performance and wide-band stable electromechanical conversion, and thus provides a promising design methodology for flexoelectric composite energy harvesters.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"394 ","pages":"Article 120690"},"PeriodicalIF":7.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148645866","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}

引用次数: 0

The switching behavior and tunability of piezoresistance in fluid-filled bi-material composite cylinders 充液双材料复合圆柱体压阻开关特性及可调性

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-08-01 Epub Date: 2026-07-26 DOI: 10.1016/j.compstruct.2026.120680

Ettore Barbieri, Taiyo Kobayashi

引用次数: 0

Physics-guided machine learning for the failure prediction of a novel Z-beam composite wing structural concept 一种新型z梁复合材料机翼结构概念失效预测的物理引导机器学习

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-08-01 Epub Date: 2026-07-21 DOI: 10.1016/j.compstruct.2026.120662

Runze Li, Mário Miranda, Lucian Iorga, Silvestre T. Pinho

{"title":"Physics-guided machine learning for the failure prediction of a novel Z-beam composite wing structural concept","authors":"Runze Li, Mário Miranda, Lucian Iorga, Silvestre T. Pinho","doi":"10.1016/j.compstruct.2026.120662","DOIUrl":"10.1016/j.compstruct.2026.120662","url":null,"abstract":"<div><div>To enhance the structural and aerodynamic performance of next-generation civil aircraft, novel composite wing concepts are being explored for aeroelastic tailoring and weight reduction. However, conventional analytical and empirical tools struggle to evaluate these complex configurations at early design stages, limiting the exploration of their full potential. This study develops physics-guided machine learning models for the prediction of mechanical response and failure behaviour of innovative Z-beam-based composite wing structures. The Z-beam concept provides increased geometric freedom, enabling tailored bending–torsion coupling. A dataset of representative Z-beam elements is generated using finite element simulations with periodic boundary conditions. Local stress concentrations are analysed using refined sub-models with LaRC05 failure criteria to compute detailed failure indices. A physics-guided learning framework is proposed to predict failure indices, dominant failure modes, and critical locations within the wing box. The framework embeds the linearity of elastic response and the monotonic relation between strain and failure indices to enhance data efficiency and prediction robustness. A second model is trained to estimate bending, torsional, and coupling stiffness properties. Results show that the proposed models deliver high predictive accuracy, providing an effective tool for early-stage design exploration and optimisation of composite wing structures.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"394 ","pages":"Article 120662"},"PeriodicalIF":7.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148651589","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}

引用次数: 0

Single-sensor impact force reconstruction in composite structures via a physics-guided multi-source data fusion network 基于物理引导的多源数据融合网络的复合材料结构单传感器冲击力重建

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-08-01 Epub Date: 2026-07-29 DOI: 10.1016/j.compstruct.2026.120706

Mingxuan Huang, Chunxing Hu, Zhonghai Xu, Chaocan Cai, Weilong Yin, Qingyu Peng

{"title":"Single-sensor impact force reconstruction in composite structures via a physics-guided multi-source data fusion network","authors":"Mingxuan Huang, Chunxing Hu, Zhonghai Xu, Chaocan Cai, Weilong Yin, Qingyu Peng","doi":"10.1016/j.compstruct.2026.120706","DOIUrl":"10.1016/j.compstruct.2026.120706","url":null,"abstract":"<div><div>With the continuous advancement of structural health monitoring (SHM) systems for composite structures, accurately reconstructing time-varying impact forces from complex, noise-contaminated acceleration signals presents a critical computational challenge. To address the inherent limitations of conventional multi-impact inversion methods while maintaining real-time performance, we propose the Force Reconstruction with Transmissibility Enhanced Network (FRTE-Net). By integrating multimodal time–frequency domain physical information with attention mechanisms, FRTE-Net effectively aligns its computational workflow with the generalized transmissibility computational process. Experimental validation conducted on a composite flat plate and a foam-core blade using a single sensor demonstrates FRTE-Net’s substantial performance advantages. Specifically, the proposed method achieves a peak force prediction accuracy exceeding 88.91 %, outperforming CNN, DCNN, and DCSCNet by 19.96 %, 4.84 %, and 12.80 %, respectively, with peak position errors ranging from 0.61 to 29.81 ms. Given the richer input information used by FRTE-Net, these improvements should be interpreted as the overall benefit of the proposed multi-source physics-guided framework. The average Pearson’s correlation coefficients of 0.9059 and 0.8847 for the two test structures further affirm FRTE-Net’s efficacy in capturing the temporal profiles of repeated impacts at identical locations with high fidelity. Finally, comprehensive evaluation across varied sensor placements and artificially induced damage stages reveals the structural center as the optimal sensor location, maintaining peak accuracy above 88.48 % even under severe damage conditions. Collectively, these findings indicate that FRTE-Net provides a practical and computationally efficient approach for single-sensor impact force reconstruction in the tested composite structures.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"394 ","pages":"Article 120706"},"PeriodicalIF":7.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148651591","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}

引用次数: 0

Topology optimization of isotropic viscoelastic microstructures based on periodic homogenization 基于周期均匀化的各向同性粘弹性微结构拓扑优化

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-08-01 Epub Date: 2026-07-23 DOI: 10.1016/j.compstruct.2026.120670

Hiroaki Deguchi, Kei Matsushima, Takayuki Yamada

引用次数: 0

Soft-matrix-guided crack twisting and bridging in bioinspired Bouligand structures: A three-dimensional phase-field study 仿生Bouligand结构中软基质引导的裂缝扭转和桥接：三维相场研究

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-08-01 Epub Date: 2026-07-25 DOI: 10.1016/j.compstruct.2026.120685

Yunqing Nie, Dongxu Li

{"title":"Soft-matrix-guided crack twisting and bridging in bioinspired Bouligand structures: A three-dimensional phase-field study","authors":"Yunqing Nie, Dongxu Li","doi":"10.1016/j.compstruct.2026.120685","DOIUrl":"10.1016/j.compstruct.2026.120685","url":null,"abstract":"<div><div>The soft matrix in bioinspired Bouligand structures provides preferential crack propagation paths and plays an important role in mediating crack twisting and fiber bridging. Here, a three-dimensional multiscale fracture framework is developed by combining the explicit phase-field method with the embedded cell modeling strategy, in which the fiber/matrix heterogeneity is explicitly resolved in the crack-tip region and along the expected crack propagation path. The results show that rapid crack penetration across interlaminate matrix-rich regions causes stepwise load drops, whereas crack propagation along intralaminate matrix interfaces between rotated fibers promotes crack twisting and helps sustain the load-carrying capacity. When the crack advances approximately perpendicular to the fiber direction, load-bearing fibers bridge the crack before fracture, further enhancing damage tolerance and giving rise to secondary load peaks. Parametric analyses show that, within the investigated range, increasing the helical angle and fiber fracture toughness improves the apparent crack resistance. These findings clarify the coupled role of soft matrix paths and helicoidal fibers in three-dimensional crack twisting and bridging, and provide insights for the design of fracture-resistant bioinspired helicoidal composites.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"394 ","pages":"Article 120685"},"PeriodicalIF":7.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148645865","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}

引用次数: 0

Underwater explosion damage and residual properties of air-backed composite corrugated sandwich panel with foam core 泡沫芯气背复合波纹夹芯板水下爆炸损伤及残留性能

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-08-01 Epub Date: 2026-07-29 DOI: 10.1016/j.compstruct.2026.120712

Yinggang Li, Yunlong Qin, Zeyuan Song, Lihao Ding, Pengyu Lou, Wen Xiao, Xiaobin Li

{"title":"Underwater explosion damage and residual properties of air-backed composite corrugated sandwich panel with foam core","authors":"Yinggang Li, Yunlong Qin, Zeyuan Song, Lihao Ding, Pengyu Lou, Wen Xiao, Xiaobin Li","doi":"10.1016/j.compstruct.2026.120712","DOIUrl":"10.1016/j.compstruct.2026.120712","url":null,"abstract":"<div><div>In this paper, the structural damage characteristics and residual properties of air-backed composite corrugated sandwich panel (CCSP) with foam core subjected to three-dimensional (3D) underwater explosion (UNDEX) loads are numerically and experimentally studied. The UNDEX damage and residual property assessment method of air-backed CCSP with polyvinyl chloride foam cores is proposed by using the acoustic-structure coupling method and initial state import method. Besides, the UNDEX experiment was conducted in a large-scale explosion pool and the compression experiment after UNDEX was carried out. In addition, an intelligent optimization framework combining the backpropagation neural network and the genetic algorithm was developed to enhance the structural strength of the CCSP. Results show that air-backed CCSP under 3D UNDEX spherical shock loads is mainly manifested as the delamination damage mode of upper facesheet concentrated at the center and along the surrounding boundaries. The UNDEX damage and residual properties of air-backed CCSP by using the proposed assessment method are consistent with the experimental results, which verifies the accuracy and reliability of the proposed assessment method. As the shock factor increases, three distinct collapse failure modes emerge in the damaged CCSP, namely global compression failure, global compression and local buckling failure, global buckling failure. Based on the optimized design, the post-explosion central deflection decreases by 23.6%, while residual compression force increases by 29.5%.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"394 ","pages":"Article 120712"},"PeriodicalIF":7.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148645945","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}

引用次数: 0

Interfacial knotting and winding reinforcement for joining homogeneous and heterogeneous 3D continuous fiber lattices 连接均匀和非均匀三维连续纤维晶格的界面打结和缠绕增强

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-08-01 Epub Date: 2026-07-21 DOI: 10.1016/j.compstruct.2026.120677

Jun Young Choi, Subin Yi, Seonghun Hyeon, Sung-Hoon Ahn

{"title":"Interfacial knotting and winding reinforcement for joining homogeneous and heterogeneous 3D continuous fiber lattices","authors":"Jun Young Choi, Subin Yi, Seonghun Hyeon, Sung-Hoon Ahn","doi":"10.1016/j.compstruct.2026.120677","DOIUrl":"10.1016/j.compstruct.2026.120677","url":null,"abstract":"<div><div>Reliable joining of independently fabricated continuous-fiber lattice units remains a critical challenge in architected composites because thin struts, porous topology, and non-planar interfaces limit effective load transfer and promote interface-dominated failure. Here, a permanent lattice-to-lattice joining strategy is developed by combining wet rebonding with mechanically reinforced fiber bridging using two architectures: localized knotting and distributed winding. Knotting introduces discrete anchoring across selected strut-level regions, whereas winding provides circumferential confinement over an extended joined interface. Mechanical evaluation under compression, monotonic tensile loading, cyclic tensile loading, and four-point bending shows that reinforced joints can retain or exceed the mass-normalized mechanical response of corresponding single-piece references, depending on reinforcement architecture and loading mode. Carbon fiber reinforced polymer (CFRP)–CFRP joints provide high stiffness and mass-normalized load-bearing performance, whereas CFRP–aramid fiber reinforced polymer (AFRP) joints introduce greater compliance and energy dissipation. Material-level impact tests on single-piece CFRP and AFRP lattices are reported separately as supplementary context. These results identify interfacial reinforcement architecture as a key design parameter for permanent assembly of continuous-fiber lattice structures.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"394 ","pages":"Article 120677"},"PeriodicalIF":7.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148651664","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}

引用次数: 0