Composite Structures最新文献

{"title":"A novel biomimetic arc support enhanced re-entrant honeycomb with enhanced strength: Experiments and simulations of mechanical performance","authors":"Ran Gu ,&nbsp;Yonghui An ,&nbsp;Wanhai Han ,&nbsp;Jinping Ou","doi":"10.1016/j.compstruct.2025.119607","DOIUrl":"10.1016/j.compstruct.2025.119607","url":null,"abstract":"<div><div>Re-entrant honeycomb (RH) structures are known for their excellent mechanical properties, particularly their negative Poisson’s ratio (NPR). However, high porosity leads to low strength, and enhancing strength often compromises NPR, limiting RH’s applications. To overcome this, a novel biomimetic arc support enhanced RH (BASERH) is proposed, which markedly improves strength, stiffness, stability, and energy absorption without significantly reducing NPR. Main innovations are listed as follows: First, embedding biomimetic arc supports in RH unit cells to increase plastic hinge coupling deformation, enhancing strength and energy absorption. Second, A theoretical model for plateau stress is developed, enabling preliminary mechanical predictions and reducing the need for extensive simulations or experiments. Third, an optimization method for BASERH parameters is proposed, revealing that arc wall thickness has the most significant influence on strength and energy absorption, followed by the height-to-length ratio, with the width-to-height ratio having the least effect. The plateau stress of BASERH is 10.4 times that of conventional RH. Under axial and radial compression, BASERH tubes exhibit 19.7% and 32.9% higher peak compressive strength, and 32.6% and 38.5% greater specific energy absorption, respectively, compared to conventional RH tubes. BASERH offers a promising design strategy for enhancing RH performance in engineering applications. BASERH can be applied in automotive crash beams, aircraft wings, explosion-proof tires, and canal gate impact panels to provide excellent strength, stiffness, cushioning, and energy absorption performance.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"373 ","pages":"Article 119607"},"PeriodicalIF":7.1,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144989189","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":"DSQK finite element with assumed orthogonality bending energy and mixed transverse shear strains for thermal buckling analysis of three-layer functionally graded sandwich plates","authors":"Irwan Katili ,&nbsp;Sundararajan Natarajan ,&nbsp;Magd Abdel Wahab ,&nbsp;Susilo Widyatmoko","doi":"10.1016/j.compstruct.2025.119615","DOIUrl":"10.1016/j.compstruct.2025.119615","url":null,"abstract":"<div><div>Thermal buckling of three-layer functionally graded sandwich plates is numerically studied using a new modified discrete shear quadrilateral plate element called the DSQK element. The plate kinematics is based on the Mindlin-Reissner formulation, and the proposed plate element has five degrees of freedom per node. To pass the constant bending strain patch test, an assumed orthogonality in bending strain energy is adopted from Bergan’s free formulation. The shear locking is alleviated by mixed transverse shear strains that are expressed by the second derivative of rotations obtained from the kinematic relationship, constitutive law, and equilibrium equations. The proposed element is valid for both thin and thick plates. The accuracy and the robustness of the proposed element are demonstrated with a few numerical examples. Furthermore, the influence of the plate aspect ratio, material gradient index, various schemes and thicknesses of three-layer functionally graded sandwich plates on the thermal buckling behaviour is studied.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"372 ","pages":"Article 119615"},"PeriodicalIF":7.1,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144907648","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 triple-ANN prediction framework for axial compression performance of CFRP thin-walled C-columns with variable cross-section","authors":"Haolei Mou ,&nbsp;Jia Zhang ,&nbsp;Zhenyu Feng","doi":"10.1016/j.compstruct.2025.119580","DOIUrl":"10.1016/j.compstruct.2025.119580","url":null,"abstract":"<div><div>This study proposes a triple artificial neural network (ANN) framework to predict the axial compression performance of carbon fiber reinforced plastic (CFRP) thin-walled C-columns with variable cross-section. Datasets from validated finite element models were used to train and test three specialized ANN models: ANN1 for predicting crashworthiness indicators, ANN2 for predicting failure modes, and ANN3 for predicting force–displacement curves. The framework integrated regression and classification, optimized through grid search hyperparameter tuning and k-fold cross-validation for robust accuracy. ANN models demonstrated excellent prediction accuracy: ANN1 achieved mean absolute percentage error (<em>MAPE</em>) less than 3% and coefficients of determination (<em>R²</em>) exceeding 0.96 for all crashworthiness indicators; ANN2 attained 98.57% classification accuracy with 100% recall rate for the breaking failure mode; and ANN3 effectively captured the variation in force with displacement, maintaining errors for initial peak crushing force and energy absorption within 10%. These models address distinct engineering needs: ANN1 enables rapid evaluation of structural crashworthiness, ANN2 ensures reliable detection of unsafe failure modes, and ANN3 provides detailed dynamic response analysis. The ANN framework accurately predicts the axial compression performance of CFRP thin-walled C-columns, providing an efficient data-driven tool for crashworthiness research in energy-absorbing components.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"372 ","pages":"Article 119580"},"PeriodicalIF":7.1,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144904419","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":"Numerical damage assessment in T700/epoxy composite laminate under low and high velocity impacts using a modified hashin-puck criterion","authors":"K. Zouggar ,&nbsp;D. Guerraiche ,&nbsp;M. Rabouh ,&nbsp;K. Guerraiche ,&nbsp;B. Haddag ,&nbsp;M.W. Harmel ,&nbsp;K. Madani ,&nbsp;R.D.S.G. Campilho","doi":"10.1016/j.compstruct.2025.119578","DOIUrl":"10.1016/j.compstruct.2025.119578","url":null,"abstract":"<div><div>The present study explores the mechanisms of damage propagation in T700/epoxy carbon-fiber reinforced plastic (CFRP) laminates subjected to impact, with a particular focus on low (LVI) and high velocity impact (HVI). To this end, a modified Hashin-Puck criterion was developed and validated with literature data. The nonlinear material behaviour and damage evolution were investigated through finite element (FE) simulations. The derived outcomes include impactor kinetic energy, impact force, impact duration, and damage classification and evolution at several scales within the structures, encompassing fiber failure, matrix cracking, delamination, and erosion. The results indicate that HVI impacts generates higher impact forces and energy magnitudes compared to LVI. The calculated forces ratio between HVI and LVI vary from 3.46 to 16.7, while the kinetic energy ratios range from 4.01 to 16.2, highlighting a prominent increase of impact forces with velocity. Additionally, the measured eroded distance in HVI reached 7.46 % of the specimen length, reflecting the increased material sensitivity to higher energy impacts. Furthermore, the analysis of induced damage demonstrates the model’s high accuracy in predicting experimental values and observations. Notably, it was shown effective in characterizing damage within the interlayer and across the material depth in the damaged zone.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"372 ","pages":"Article 119578"},"PeriodicalIF":7.1,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144907635","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 reliable framework for assessing the impact resistance and post-impact damage tolerance of 3D hybrid composites against high-energy fragments and hailstones","authors":"Ke Wang,&nbsp;Farid Taheri","doi":"10.1016/j.compstruct.2025.119589","DOIUrl":"10.1016/j.compstruct.2025.119589","url":null,"abstract":"<div><div>The feasibility of using a recently developed 3D Hybrid Composite for aircraft applications is numerically investigated using the Smoothed Particle Hydrodynamics (SPH) method. The study focuses on assessing the impact resistance and damage tolerance of the composite under conditions specified by aerospace certification standards, including impacts from high-energy fragments and hailstones. The primary objective is to develop a robust, cost-effective, and reliable computational framework for predicting the ballistic limits and minimum Compression After Impact (CAI) load capacity of 3DHC materials during the design phase—thus reducing reliance on costly and time-consuming experiments.</div><div>To this end, two practical tools are introduced: (1) a design chart for estimating ballistic limits of the novel 3DHC under various projectile types, and (2) an empirical method for quickly predicting the minimum CAI load capacity based on projectile and panel dimensions. These methods are validated against in-house experimental data. Results demonstrate that the combined approach offers engineers a fast and reasonably accurate means to evaluate the performance of 3DHC panels under critical impact scenarios relevant to aerospace structural design. Notably, simulations reveal that successive impacts from large hailstones can induce buckling-related degradation in CAI load-bearing capacity.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"372 ","pages":"Article 119589"},"PeriodicalIF":7.1,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895369","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":"An automatic differentiation-based meshfree Lagrange interpolation method for bending and free vibration analysis of FGM plates","authors":"Zhong-Min Huang ,&nbsp;Lin-Xin Peng","doi":"10.1016/j.compstruct.2025.119608","DOIUrl":"10.1016/j.compstruct.2025.119608","url":null,"abstract":"<div><div>This paper presents a mesh-free Lagrangian interpolation method for analyzing the bending and free vibration of functionally graded material (FGM) plates. The method leverages automatic differentiation within the PyTorch deep learning framework in conjunction with higher-order shear deformation theory (HSDT). Initially, the method employs Lagrangian interpolation theory alongside nodal function values to construct a mesh-free numerical model, utilizing Gaussian discrete node coordinates as input parameters. By incorporating automatic differentiation, the approach efficiently computes the derivatives of the model outputs to calculate the system’s potential energy. Subsequently, the stiffness, mass matrix, and load vector for FGM plates under HSDT are derived through automatic differentiation, with internal model parameters determined via linear algebra operations. The proposed method’s accuracy is confirmed through comparisons with literature solutions, demonstrating its capability to avoid manual assembly of the stiffness matrix and support more flexible boundary condition implementations. Meanwhile, compared with other numerical methods based on deep learning algorithms (such as DEM, PINNs), the proposed model exhibits stronger interpretability.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"372 ","pages":"Article 119608"},"PeriodicalIF":7.1,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895361","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":"Multi-functional application of recycled carbon fibres in hybrid composites for notch sensitivity reduction and damage monitoring","authors":"Fan Zhang ,&nbsp;Ting Yang Ling ,&nbsp;Liudi Jiang ,&nbsp;Yonggang Zhang ,&nbsp;Khong Wui Gan","doi":"10.1016/j.compstruct.2025.119574","DOIUrl":"10.1016/j.compstruct.2025.119574","url":null,"abstract":"<div><div>It is challenging to reuse recycled carbon fibres (rCF) alone as reinforcement material in composites for structural application due to its discontinuous and non-aligned fibre architecture. This study investigates innovative usage of rCF when hybridized with other reinforcement fibres in a hybrid composite for multi-functional application. A rCF non-woven is embedded in an E-glass fabric composite laminate to demonstrate its multi-functionality in open-hole specimens with various hole sizes under monotonic tensile loading. Instead of brittle failure, the rCF fails in a progressive manner due to the in-situ effect offered by the neighbouring glass fibre sublaminates. Following damage initiation in the rCF layer, delamination takes place along the rCF and glass fabric interfaces, enabling stress redistribution around the hole. This leads to reduced stress concentration, resulting in a notch-insensitive hybrid composite when compared to the non-hybrid glass fabric composite. By monitoring the change in electrical resistance of the rCF layer, the progressive damage events around the hole can be inferred. Regardless of the hole size, a simple damage self-sensing system can be developed to inform the damage severity of the hybrid composite. In this study, the rCF layer gives a damage tolerant notched composite and simultaneously offers damage monitoring functionality.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"372 ","pages":"Article 119574"},"PeriodicalIF":7.1,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144904417","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":"Uncertainty quantification in free vibration of porous functionally graded micro-beams using double parametric form based Haar wavelet Discretization Method","authors":"Subrat Kumar Jena ,&nbsp;Victor A. Eremeyev ,&nbsp;Emanuele Reccia ,&nbsp;S. Chakraverty","doi":"10.1016/j.compstruct.2025.119600","DOIUrl":"10.1016/j.compstruct.2025.119600","url":null,"abstract":"<div><div>This study presents a comprehensive investigation into uncertainty quantification in the free vibration analysis of functionally graded (FG) micro-beams using a double parametric form-based Haar Wavelet Discretization Method (HWDM). The spatial variation of Young’s modulus and mass density across the beam’s thickness is characterized by a power-law distribution, with the FG micro-beam composed of two constituent materials of metallic phase and ceramic phase (here aluminum (Al) and alumina (Al₂O₃) are taken), incorporating uniformly distributed porosity to reflect material inhomogeneities. Material uncertainties are modeled using Symmetric Gaussian Fuzzy Numbers (SGFNs) for both the metallic and ceramic constituents. To accurately capture size-dependent mechanical behavior at the microscale, the Modified Couple Stress Theory (MCST) is employed. The numerical robustness and accuracy of HWDM are verified through pointwise convergence studies. To further assess the influence of material uncertainty, a Monte Carlo Simulation Technique (MCS) is utilized, generating a large ensemble of random samples within the defined fuzzy bounds to estimate the natural frequencies. The natural frequencies obtained from HWDM, represented as Lower and Upper Bounds (LB and UB), show excellent agreement with those derived from the MCS, thereby validating the proposed fuzzy-based approach. Additional validation is performed by comparing HWDM results with those from Navier’s method under the Hinged-Hinged (H-H) boundary condition, further demonstrating the accuracy of the present formulation. A detailed parametric study is conducted to explore the effects of the power-law exponent, porosity volume fraction index, and thickness-to-material length scale ratio on the natural frequencies under fuzzy uncertainty. The investigation is carried out across multiple classical boundary conditions—Hinged-Hinged (H-H), Clamped-Hinged (C–H), and Clamped-Clamped (C–C). Physical interpretations of the observed trends are provided, highlighting the complex interplay between material gradation, porosity, size effects, and uncertainty in the dynamic response of FG micro-structures.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"372 ","pages":"Article 119600"},"PeriodicalIF":7.1,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144890491","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":"Dynamic mechanical response of corrugated & flat rolling (CFR) titanium/steel composite plate under ballistic impact","authors":"Zirui Liang ,&nbsp;Luze Ren ,&nbsp;Jingyu Liu ,&nbsp;Chuanhao Lu ,&nbsp;Zhongwei Zhang ,&nbsp;Yong Cao","doi":"10.1016/j.compstruct.2025.119587","DOIUrl":"10.1016/j.compstruct.2025.119587","url":null,"abstract":"<div><div>This study systematically investigates the dynamic mechanical behavior of corrugated &amp; flat rolling (CFR) titanium/steel composite plates under ballistic impact. A novel metric, the critical delamination velocity (<span><math><msub><mi>v</mi><mrow><mi>cd</mi></mrow></msub></math></span>), is introduced to assess the impact resistance of CFR titanium/steel composite plates. The research reveals that the position of impact on the corrugation interface curve significantly influences the failure modes. Detailed three-dimensional finite element simulations were performed to provide insights into the penetration process and energy absorption characteristics of the CFR titanium/steel composite plate, as well as the influence of the interfacial fracture toughness on impact performance. The numerical simulation reveals that the failure mode of flipped-cover possesses superior energy absorption efficiency compared to the shearing plug mode, primarily due to the enhanced plastic deformation. Furthermore, by varying the interfacial fracture toughness in the numerical model, it is demonstrated that increasing the fracture toughness can effectively reduce delamination and global plastic deformation. Additionally, the influence of interfacial geometry on mechanical response was systematically investigated by comparing the impact behavior of plates featuring corrugated and planar interfaces. The results indicate that the corrugated interface enhances the impact resistance of the composite plates by increasing the contact area and altering the failure modes.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"372 ","pages":"Article 119587"},"PeriodicalIF":7.1,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895153","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":"Numerical and experimental study on the open-hole tensile properties of angle-ply carbon/glass hybrid laminates based on thin-ply carbon fiber prepreg","authors":"Wenlong Lu ,&nbsp;Haotian Yang ,&nbsp;Hao Dong ,&nbsp;Dingding Chen ,&nbsp;Junfeng Hu","doi":"10.1016/j.compstruct.2025.119577","DOIUrl":"10.1016/j.compstruct.2025.119577","url":null,"abstract":"<div><div>The angle-ply fiber-reinforced polymer (FRP) laminates and carbon/glass (C/G) hybrid laminates could exhibit nonlinear failure characteristics, providing an obvious warning signal before the failure of material, which is defined as pseudo-ductility. Moreover, in practical engineering applications, FRP structures often require an open hole to meet connection requirements, resulting in strength reduction of structures. In this study, four types of angle-ply C/G hybrid laminates, 0G0C, 15G15C, 45G45C, and 75G15C, were fabricated. Static tensile tests and finite element simulations were applied to research the influence of ply angle and open-hole on the pseudo-ductility of C/G hybrid laminates. The 0G0C laminate achieved a pseudo-ductile damage process through stable delamination around slits, with pseudo-ductile strains reaching 1.04 %. With the increased ply angle, the influence of slits on delamination was weakened. The introduction of hole results in tensile strength reductions of 51.8 %, 52.2 %, 48.7 %, and 31.6 % for the four structures, respectively. A multi-scale approach was applied to analyze the angle-ply laminates. The micro-scale model exhibited that the failure mode transitioned from fiber fracture to matrix damage with the increase of ply angle. The <em>meso</em>-scale model accurately described the damage of the angle-ply laminates, consistent with experimental observations.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"372 ","pages":"Article 119577"},"PeriodicalIF":7.1,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144892927","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}