Composite Structures最新文献_第3页

Phase field simulation of fracture behavior in flexible piezoelectric composites containing hard inclusions 含硬夹杂柔性压电复合材料断裂行为的相场模拟

IF 7.1 2区材料科学

Composite Structures Pub Date : 2026-05-01 Epub Date: 2026-01-28 DOI: 10.1016/j.compstruct.2026.120106

Shihao Lv , Yan Shi , Cunfa Gao

{"title":"Phase field simulation of fracture behavior in flexible piezoelectric composites containing hard inclusions","authors":"Shihao Lv , Yan Shi , Cunfa Gao","doi":"10.1016/j.compstruct.2026.120106","DOIUrl":"10.1016/j.compstruct.2026.120106","url":null,"abstract":"<div><div>A phase field framework is developed to simulate fracture behavior in flexible piezoelectric composites under electromechanical loading. Existing piezoelectric phase field fracture models may encounter numerical challenges for highly stretchable systems, such as spurious damage evolution near electrode edges. To mitigate this issue, we introduce a higher-order exponent degradation function to locally reduce the piezoelectric and dielectric parameters near the electrodes. This localized treatment regularizes the electromechanical contribution to the stress response while retaining the original crack-driving energetic formulation, thereby suppressing non-physical crack growth near electrodes. Notably, the original material properties are preserved in the remaining regions. The formulation is implemented in ABAQUS via a user element subroutine (UEL). Numerical results show that the unmodified formulation may develop spurious electrode-edge damage, which can trigger premature failure; the proposed modification effectively suppresses this numerical artifact. When spurious damage does not occur, the modified and unmodified predictions are nearly identical, indicating a negligible impact on the global response. In addition, systematic simulations are performed to quantify the effects of inclusion type, size, and spatial arrangement on the fracture behavior of flexible piezoelectric composites.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"383 ","pages":"Article 120106"},"PeriodicalIF":7.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186441","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

Magnetic field distribution of unidirectional carbon fiber fabric under direct current 直流作用下单向碳纤维织物的磁场分布

IF 7.1 2区材料科学

Composite Structures Pub Date : 2026-05-01 Epub Date: 2026-02-08 DOI: 10.1016/j.compstruct.2026.120137

Yongan WANG, Bohong GU, Baozhong SUN

{"title":"Magnetic field distribution of unidirectional carbon fiber fabric under direct current","authors":"Yongan WANG, Bohong GU, Baozhong SUN","doi":"10.1016/j.compstruct.2026.120137","DOIUrl":"10.1016/j.compstruct.2026.120137","url":null,"abstract":"<div><div>Ampere’s circuital law reveals that a magnetic field is generated around a current carrying conductor. Investigating the magnetic field distribution of current carrying carbon fibers is essential for understanding their electromagnetic applications. In this paper, the magnetic field distribution characteristics around unidirectional carbon fiber fabrics are investigated under direct current loading conditions. A finite element analysis model of unidirectional carbon fiber fabric is constructed, and the effects of different fiber angles, current strengths and measurement distances on the magnetic flux density distribution are investigated. The results indicate a magnetic flux density concentration at the edge of the conductive path, defined as the magnetic field current edge effect. In addition, a theoretical calculation model of the magnetic field at the center position is derived based on the Biot-Savart law, and the validation results show that the error between the theoretical and experimental results is less than 5% in most cases, which indicates that the model is able to predict the magnetic flux density at the center position of carbon fibers effectively. This study provides a theoretical basis and modeling method for the electromagnetic response behavior of carbon fiber composites.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"383 ","pages":"Article 120137"},"PeriodicalIF":7.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186440","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

In-process embedded FRP grid for enhanced flexural performance of 3D-printed concrete plates 在过程中嵌入玻璃钢网格增强抗弯性能的3d打印混凝土板

IF 7.1 2区材料科学

Composite Structures Pub Date : 2026-05-01 Epub Date: 2026-02-07 DOI: 10.1016/j.compstruct.2026.120132

Hou-Qi Sun , Jun-Jie Zeng , Chao-Lan Wu , Jie-Kai Zhou , Yan Zhuge , J.G. Dai

{"title":"In-process embedded FRP grid for enhanced flexural performance of 3D-printed concrete plates","authors":"Hou-Qi Sun , Jun-Jie Zeng , Chao-Lan Wu , Jie-Kai Zhou , Yan Zhuge , J.G. Dai","doi":"10.1016/j.compstruct.2026.120132","DOIUrl":"10.1016/j.compstruct.2026.120132","url":null,"abstract":"<div><div>3D concrete printing technology is well suited to the construction of multi-material functionally graded concrete (FGC) structures. However, the layer‑by-layer deposition nature hinders the placement of conventional steel reinforcement, often resulting in poor flexural performance, while the inherently higher porosity of 3D-printed concrete (3DPC) can accelerate steel corrosion and compromise durability. To address these issues, this paper proposes a dual-nozzle system that is capable of the in-process embedment of corrosion-resistant fiber-reinforced polymer (FRP) grids during the fabrication of FGC using the 3DPC technology. The proposed method was evaluated using three‑point bending tests, mercury intrusion porosimetry (MIP), and scanning electron microscopy (SEM) to examine how FRP grid properties and printing parameters affect the flexural performance and the interface between printed layers. The results demonstrated that the embedded FRP grids significantly enhanced the flexural performance: flexural strength, energy absorption capacity, and ductility increased by up to 110.2%, 1744.3%, and 479.2%, respectively. Flexural performance improved with higher FRP grid content and extrusion rate, whereas it declined with increasing nozzle travelling speed, interval time, and nozzle standoff distance. MIP tests indicated that adding FRP grids raises interlayer interface porosity, especially pores larger than 5000 nm. SEM further confirmed that pore morphology at the FRP grid‑concrete interface critically influences flexural performance. The findings highlight that in-process embedded FRP grid reinforcement offers a practical pathway to automated, durable, and high-performance 3D-printed cementitious composites.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"383 ","pages":"Article 120132"},"PeriodicalIF":7.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186439","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-objective Bayesian optimization of composite aircraft wings using various carbon fibers 不同碳纤维复合材料飞机机翼多目标贝叶斯优化

IF 7.1 2区材料科学

Composite Structures Pub Date : 2026-05-01 Epub Date: 2026-02-05 DOI: 10.1016/j.compstruct.2026.120105

Yajun Liu , Yoshiaki Abe , Ryosuke Kano , Yuki Yatsu , Katsumi Nakamura , Koji Shimoyama , Tomonaga Okabe , Shigeru Obayashi

{"title":"Multi-objective Bayesian optimization of composite aircraft wings using various carbon fibers","authors":"Yajun Liu , Yoshiaki Abe , Ryosuke Kano , Yuki Yatsu , Katsumi Nakamura , Koji Shimoyama , Tomonaga Okabe , Shigeru Obayashi","doi":"10.1016/j.compstruct.2026.120105","DOIUrl":"10.1016/j.compstruct.2026.120105","url":null,"abstract":"<div><div>This study presents the first application of multi-objective Bayesian optimization (MBO) for designing carbon fiber reinforced plastic (CFRP) aircraft wing planforms. The design process integrates two-way aeroelastic coupling and structural sizing analyses. Compared to the conventional NSGA-II genetic algorithm, MBO generated a more diverse and advanced Pareto front using only one-tenth of the function evaluations under the given problem and optimization parameters. The resultant Pareto front revealed two distinct design regions: one characterized by a constant minimum wingspan and varying sweep angle, and the other by a constant maximum sweep with increasing wingspan, offering new insight into aerodynamic–structural trade-offs in composite wing design. Among three carbon fibers (T700S, T800S, and T1100G), higher-stiffness fibers consistently reduced total wing weight, while component-level sensitivity differed with geometry. The result first reports the effects of fiber properties on comprehensive Pareto-optimal solutions using global optimization via the MBO approach. Furthermore, the reduction in compressive strength was evaluated by integrating the inevitable fiber misalignment angle during manufacturing into the micromechanics (Budiansky–Fleck) model, and the wing weight was estimated accordingly. Such a misalignment significantly affected the weight and failure modes of the upper skin, especially for the high-aspect-ratio wing design.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"383 ","pages":"Article 120105"},"PeriodicalIF":7.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186450","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

Designing tension-resistant multi-material structures via novel interfacial-effect-considered topology optimization method using material-field series expansion 基于材料场串联展开的新型考虑界面效应拓扑优化方法设计抗拉多材料结构

IF 7.1 2区材料科学

Composite Structures Pub Date : 2026-05-01 Epub Date: 2026-02-07 DOI: 10.1016/j.compstruct.2026.120134

Han Zhengtong , Zhou Yang , Xu Ze , He Gang , Zhang Yingtao , Wang Yanjie

{"title":"Designing tension-resistant multi-material structures via novel interfacial-effect-considered topology optimization method using material-field series expansion","authors":"Han Zhengtong , Zhou Yang , Xu Ze , He Gang , Zhang Yingtao , Wang Yanjie","doi":"10.1016/j.compstruct.2026.120134","DOIUrl":"10.1016/j.compstruct.2026.120134","url":null,"abstract":"<div><div>Recent advances in additive manufacturing enable fabrication of complex multi-material structures, yet existing multi-material topology optimization (MMTO) methods generally neglect interfacial tension–compression asymmetry effects, risking premature failure under tensile loads. Addressing this limitation, we propose an interfacial-effect-considered MMTO framework based on material-field series expansion (MFSE), enabling interface representation while significantly reducing design variables. Precise interface identification and width control are achieved through a gradient-norm-based approach with <em>p</em>-norm smoothing dilation operators. Tension-compression asymmetry is handled via strain energy decomposition, implemented as delayed-activated interfacial strain energy constraints to balance integrity and stiffness during optimization. Numerical validations on five benchmarks show the method successfully generates distinct material configurations and substantially lowers interfacial tensile strain energy compared to conventional designs. Experimental validation through additive manufacturing and tensile testing confirms that optimized structures fail via substrate fracture before interface failure, unlike conventional designs exhibiting complete interfacial debonding, thereby validating both the framework’s efficacy and enhanced tensile resistance. This work bridges theoretical MMTO with practical interfacial reliability for high-performance multi-material systems.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"383 ","pages":"Article 120134"},"PeriodicalIF":7.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186783","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

A hybrid analytical framework for vibroacoustic analysis of submerged laminated composite cylindrical shells with embedded cavities under hydrostatic pressure 静水压力下带内嵌腔的水下复合材料层合圆柱壳振动声分析的混合分析框架

IF 7.1 2区材料科学

Composite Structures Pub Date : 2026-05-01 Epub Date: 2026-02-01 DOI: 10.1016/j.compstruct.2026.120112

Xinyi Han, Tianyun Li, Zhiwei Wan, Xiang Zhu, Cheng Zhang

{"title":"A hybrid analytical framework for vibroacoustic analysis of submerged laminated composite cylindrical shells with embedded cavities under hydrostatic pressure","authors":"Xinyi Han, Tianyun Li, Zhiwei Wan, Xiang Zhu, Cheng Zhang","doi":"10.1016/j.compstruct.2026.120112","DOIUrl":"10.1016/j.compstruct.2026.120112","url":null,"abstract":"<div><div>This study proposes a hybrid analytical method integrating the equivalent homogenization method with a Multi-level model, achieving the efficient prediction of the vibroacoustic performances of submerged sandwich laminated composite cylindrical shell embedded with cavities. The Mori-Tanaka formula is utilized to obtain the effective homogenous mechanical parameters of the cavity layer. The structural dynamic model is formulated using the energy principle, in which each layer follows the first-order shear deformation theory (FSDT) and the displacement continuity between layers satisfies Layerwise theory. Coupling with the external acoustic field is realized via the Kirchhoff–Helmholtz boundary integral equation, and a localized mesh refinement strategy is applied to avoid integral singularity at the coupling interface and enhance computational accuracy. The hydrostatic pressure of fluid is expressed as the lateral pressure acting on structural surface. Through numerical analysis, the proposed method demonstrates higher computational efficiency while maintaining good agreement with finite element results. Parametric studies investigate the effects of cavity volume fraction, thickness of homogenous layer, boundary conditions and hydrostatic pressure on the structural vibroacoustic characteristics. Results demonstrate that cavity layer significantly suppresses low-frequency vibration and radiated acoustic field of the sandwich structure. The proposed method provides theoretical guidance for designing advanced underwater stealth structures.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"383 ","pages":"Article 120112"},"PeriodicalIF":7.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186778","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

Estimation of residual stress in carbon fibre composite laminate using the contour method 用轮廓法估计碳纤维复合材料层合板残余应力

IF 7.1 2区材料科学

Composite Structures Pub Date : 2026-05-01 Epub Date: 2026-02-10 DOI: 10.1016/j.compstruct.2026.120147

Bilal Ahmad , Xiang Zhang , Hua Guo , Michael E. Fitzpatrick , David Ayre

{"title":"Estimation of residual stress in carbon fibre composite laminate using the contour method","authors":"Bilal Ahmad , Xiang Zhang , Hua Guo , Michael E. Fitzpatrick , David Ayre","doi":"10.1016/j.compstruct.2026.120147","DOIUrl":"10.1016/j.compstruct.2026.120147","url":null,"abstract":"<div><div>Experimental analysis of residual stress in carbon-fibre-reinforced polymer (CFRP) composites is rare owing to the difficulties of determining residual stress accurately in these materials. This can lead to non-conservatism in design and poor understanding of potential failure mechanisms. In this study we have determined the residual stress in a cross-ply CFRP laminate. For the first time, the contour method of residual stress measurement was applied using wire electric-discharge machining (WEDM), the process that is accepted as the best way to ensure an accurate relaxed surface profile is obtained to back calculate the residual stress. A novel incremental linear smoothing approach was introduced for the measured displacement data which gave better approximation than the conventional spline smoothing method used in the standard contour method for metals. Measurements show tensile residual stress in the direction transverse to the fibres with a maximum value of 40 MPa, and compressive residual stress along the fibre direction with a maximum value of –130 MPa. The accuracy of the calculated residual stress was improved by considering the measured thickness of each ply cluster rather than the nominal thickness. The results of modified contour method are compared with an analytical solution based on the classical laminate theory.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"383 ","pages":"Article 120147"},"PeriodicalIF":7.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186770","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 static and dynamic analysis of the functionally graded magneto-electro-thermo-elastic multi-physical system based on the finite block method 基于有限块法的功能梯度磁-电-热-弹性多物理系统的静态和动态分析

IF 7.1 2区材料科学

Composite Structures Pub Date : 2026-05-01 Epub Date: 2026-02-08 DOI: 10.1016/j.compstruct.2026.120123

X.B. Yan, X. Li, P.H. Wen

{"title":"The static and dynamic analysis of the functionally graded magneto-electro-thermo-elastic multi-physical system based on the finite block method","authors":"X.B. Yan, X. Li, P.H. Wen","doi":"10.1016/j.compstruct.2026.120123","DOIUrl":"10.1016/j.compstruct.2026.120123","url":null,"abstract":"<div><div>Based on the Finite Block Method (FBM) framework of the Lagrange interpolation polynomials with Chebyshev nodes distribution, the generalized displacement fields (elastic, electric, and magnetic fields) are discretized to characterize the static and transient responses of Functionally Graded Magneto-Electro-Thermo-Elastic (FGMETE) smart materials under thermal environments. The structure is divided into blocks and mapped, while the governing equations and boundary conditions are discretized. The resulting system of linear equations is solved to compute the generalized displacements (displacements, electric, and magnetic potential). The transient response is computed by discretizing time using the Houbolt difference method. The distribution of Chebyshev nodes has significantly improved the convergence of FBM, effectively avoiding the “Runge Phenomenon” caused by Lagrange interpolation. The accuracy, convergence, and effectiveness of the FBM are demonstrated through several numerical examples. The influence of temperature on the generalized displacements was investigated, and the impacts of both clamped and free boundary conditions on the generalized displacements were also examined. Additionally, a comprehensive discussion on the transient behavior of the smart structure around the Curie temperature was provided. The results from both steady-state and transient analyses demonstrate the remarkable applicability of the FBM for Functionally Graded Magneto-Electro-Elastic (FGMEE) smart materials under thermal environments.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"383 ","pages":"Article 120123"},"PeriodicalIF":7.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186769","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

A novel three-point bending approach for evaluating the interlaminar tensile strength of ceramic matrix composites 一种评估陶瓷基复合材料层间拉伸强度的三点弯曲新方法

IF 7.1 2区材料科学

Composite Structures Pub Date : 2026-05-01 Epub Date: 2026-02-06 DOI: 10.1016/j.compstruct.2026.120144

Wenbo Li , Jintao Zhu , Mingyang Chen , Feipeng Wang , Zeshuai Yuan , Junping Li , Liao-Liang Ke

{"title":"A novel three-point bending approach for evaluating the interlaminar tensile strength of ceramic matrix composites","authors":"Wenbo Li , Jintao Zhu , Mingyang Chen , Feipeng Wang , Zeshuai Yuan , Junping Li , Liao-Liang Ke","doi":"10.1016/j.compstruct.2026.120144","DOIUrl":"10.1016/j.compstruct.2026.120144","url":null,"abstract":"<div><div>The interlaminar tensile strength (ILTS) is one of the most crucial mechanical properties regulating the performance of ceramic matrix composites (CMC). In this study, we propose a novel method for measuring ILTS based on three-point bending tests, which is validated through finite element (FE) simulations. The method involves bonding stacked laminates to achieve a composite beam, effectively avoiding the difficulty arising from manufacturing thick laminates. By employing this innovative approach, the ILTS of CMC reinforced by carbon fiber is successfully measured. In addition, scanning electron microscopy (SEM) and acoustic emission (AE) systems are utilized to investigate the failure patterns and processes. The results show that the ILTS values obtained through the developed method are both accurate and reliable, offering a practical approach for ILTS measurement. Besides, the study reveals that the failure in CMC laminates is primarily driven by delamination, which is attributed to the debonding between the fibers and the matrix. The damage is mainly characterized by cracking of the ceramic matrix, while the carbon fibers remain largely undamaged.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"383 ","pages":"Article 120144"},"PeriodicalIF":7.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186442","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

Efficient analytical modeling of progressive damage and contact stiffening in composite laminate under repeated impacts 复合材料层合板在重复冲击下的渐进损伤和接触强化的有效分析建模

IF 7.1 2区材料科学

Composite Structures Pub Date : 2026-05-01 Epub Date: 2026-02-06 DOI: 10.1016/j.compstruct.2026.120138

Vikram Manoj Kumar Neesu , Vibhuti Bhushan Pandey , Puneet Mahajan , Harpreet Singh

{"title":"Efficient analytical modeling of progressive damage and contact stiffening in composite laminate under repeated impacts","authors":"Vikram Manoj Kumar Neesu , Vibhuti Bhushan Pandey , Puneet Mahajan , Harpreet Singh","doi":"10.1016/j.compstruct.2026.120138","DOIUrl":"10.1016/j.compstruct.2026.120138","url":null,"abstract":"<div><div>Composite laminate under repeated low-velocity impacts exhibits progressive stiffness degradation and contact stiffening phenomena due to localized hardening around the contact zone. Existing single impact analytical models cannot predict both effects simultaneously, necessitating expensive numerical simulations. To address this limitation, the present study introduces a novel analytical framework that integrates a Multiple Concentric Ring Theory (MCRT) with a phenomenological hardening function to model repeated impact behavior in fiber-reinforced polymer (FRP) laminates. The MCRT idealizes the impact zone as a series of concentric regions with progressively reduced stiffness, governed by an energy based damage law. Concurrently, the hardening function captures the transient local stiffening that arises from matrix yielding during early impacts, enabling accurate reproduction of the characteristic non-monotonic force response. The analytical model dynamically updates bending, shear, and membrane stiffness within a two degree of freedom spring-mass framework, providing a physically consistent and computationally efficient alternative to high-fidelity numerical simulations. Model predictions show excellent agreement with experimental data and finite element results in terms of peak contact force, displacement evolution, and damage propagation, establishing a robust foundation for life prediction and impact tolerance assessment of composite laminates under repeated low-velocity impact loading.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"383 ","pages":"Article 120138"},"PeriodicalIF":7.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186449","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