Composite Structures最新文献

{"title":"Novel overlapped & staggered interface structure (OS-IS) enhancing the bonding strength between heterogeneous material in fused filament fabrication","authors":"J.F. Lei,&nbsp;K.W. Chen,&nbsp;L. Chen,&nbsp;T. Liu,&nbsp;H. Sun,&nbsp;L. Wang","doi":"10.1016/j.compstruct.2025.119726","DOIUrl":"10.1016/j.compstruct.2025.119726","url":null,"abstract":"<div><div>In multi-material fused filament fabrication (FFF), heterogeneous material interfaces often constitute structural weak points due to mismatched mechanical properties, thereby limiting the performance of the overall component. To overcome this limitation, a novel overlapped staggered interface structure (OS-IS) was proposed and developed in this study. A series of microstructure analysis, tensile tests, and shear tests were performed on the specimens with these designed heterogeneous interface structures. Results demonstrate that the distinctive geometric configuration of the OS-IS significantly enlarges the contact area between heterogeneous materials, leading to a notable enhancement in interfacial bonding performance. Specifically, compared to the regular interface structure (R-IS), the tensile strength and elongation at break are improved by 29.4 % and 94.8 %, respectively. Moreover, an optimized heat treatment process can effectively enhance interfacial properties. The bio-inspired joint incorporating the OS-IS exhibited a 98.1 % increase in the critical bending-fracture angle compared to the R-IS demonstrating its potential for application such as biomimetic hands. Therefore, this study proposes a novel structural design strategy to overcome interfacial compatibility challenges in multi-material additive manufacturing.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"374 ","pages":"Article 119726"},"PeriodicalIF":7.1,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219089","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":"Thermoelastic analysis of sandwich conical shells with GPLs reinforced face sheets and porous core under moving thermomechanical loading","authors":"Parviz Malekzadeh ,&nbsp;Yasin Heydarpour ,&nbsp;Hanxing Zhu","doi":"10.1016/j.compstruct.2025.119713","DOIUrl":"10.1016/j.compstruct.2025.119713","url":null,"abstract":"<div><div>The thermoelastic responses of the sandwich truncated conical shells with graphene platelets (GPLs) reinforced composite face sheets and GPLs reinforced composite porous core subjected to ring-shape moving thermo-mechanical loading are studied. In order to capture the influences of the finite heat wave speed and the thermo-mechanical coupling, the Lord-Shulman thermoelasticity theory, which has no kinematical assumption such as those used in the two-dimensional theories, is employed to accurately estimate the thermoelastic behaviors of the sandwich shells. A layerwise hybrid numerical technique composed of the differential quadrature method and multi-step based NURBS method is applied to discretize the strong form of the equations in the spatial and temporal domains, respectively. Also, the boundary and compatibility conditions at the interfaces of the layer are exactly implemented at the corresponding grid points. After validating the proposed approach, parametric studies are conducted and discussed to explore the impacts of the porosity amount and distribution, GPLs weight fractions, thermo-mechanical load velocity, edge boundary conditions and some other parameters on the thermoelastic behaviors of the sandwich shells. The results indicate that the increase of the GPLs weight fraction decreases the displacement and changes its distribution along the shell thickness but does not affect the stress distribution. Also, the porosity distribution pattern changes the displacement distribution, and the displacement has the lowest values when the porosity is higher near the inner surface of the core layer.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"373 ","pages":"Article 119713"},"PeriodicalIF":7.1,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227056","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":"Impact resistance and failure mechanisms of high strength-high ductility concrete beams under repeated low-velocity impacts","authors":"Jintao Liu ,&nbsp;Xinyang Yu ,&nbsp;Sijie Han ,&nbsp;Bing Wang ,&nbsp;Xin Zhao ,&nbsp;Deyu Kong ,&nbsp;Surendra P. Shah","doi":"10.1016/j.compstruct.2025.119712","DOIUrl":"10.1016/j.compstruct.2025.119712","url":null,"abstract":"<div><div>Despite significant advances in understanding the material properties of High Strength-High Ductility Concrete (HSHDC), there remains a critical gap in studies examining the influence of reinforcement configurations on the impact resistance of HSHDC components in practical applications. This study explores the influence of reinforcement ratios on the impact resistance of HSHDC beams through multiple drop-weight impact tests. Key parameters including impact force, reaction force, deflection, energy dissipation, crack propagation, and failure mechanisms, were analyzed. The results reveal that, with the same reinforcement ratio, utilization of HSHDC can significantly reduce mid-span, peak deflections and spall compared to traditional reinforced concrete (RC), while enhancing cumulative energy dissipation by 12.9%. Increasing the ratio to 1.67% transitioned the failure mode to adequately reinforced, resulting in a 155% increase in cumulative energy dissipation compared to the 0.74% group. Higher longitudinal reinforcement ratios promote more uniform deflection distribution and slower increases in post-impact residual deflection, exhibiting a “pseudo-stabilization” phenomenon similar to that observed in metallic structures. Additionally, HSHDC’s superior shear resistance leads to ductile shear failure behavior. These findings highlight the potential of HSHDC to enhance structural performance while allowing for reduced stirrup usage, offering significant economic and practical benefits for construction applications.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"374 ","pages":"Article 119712"},"PeriodicalIF":7.1,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219087","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":"Temperature prediction and regulation for complex curved parts during automated fiber placement combining FE simulation and machine learning","authors":"Helin Pan ,&nbsp;Jianhui Fu ,&nbsp;Lei Zu ,&nbsp;Xianzhao Xia ,&nbsp;Qian Zhang ,&nbsp;Guiming Zhang ,&nbsp;Qiaoguo Wu ,&nbsp;Lichuan Zhou ,&nbsp;Huabi Wang ,&nbsp;Debao Li","doi":"10.1016/j.compstruct.2025.119705","DOIUrl":"10.1016/j.compstruct.2025.119705","url":null,"abstract":"<div><div>Layup temperature is the most sensitive process parameter that impacts the prepreg tack and placement quality. Multi-physics-based process modeling for laying temperature on complex curve structures is time-consuming and notoriously difficult due to the interaction between process conditions and material parameters. This paper develops a hybridized model, combining a FE model (FEM), and a direct and inverse data-driven machine learning model (DDMLM), that can be utilized to simulate the heating process of AFP and control the material temperature for complex curved structures. In it, the dataset obtained from the FEM is first utilized to inform a direct data-driven machine-learning model that can obtain the relationship between layup temperature, heating power, and head speed through training, testing, and validation. Then, an inverse machine learning model is established to estimate the heating power for the defined layup temperature. Finally, the hybridized model is exemplarily executed on a winglet mold to confirm the benefits of such an integration. The results validate that the model can improve the temperature prediction efficiency and realize temperature control accurately.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"373 ","pages":"Article 119705"},"PeriodicalIF":7.1,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227050","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":"Synchrotron microtomography results for notched composites under quasi-static and fatigue loading","authors":"J. Fernando Rojas Sanchez ,&nbsp;Anthony M. Waas ,&nbsp;Wooseok Ji ,&nbsp;Chaeyoung Hong ,&nbsp;Minsu Park","doi":"10.1016/j.compstruct.2025.119708","DOIUrl":"10.1016/j.compstruct.2025.119708","url":null,"abstract":"<div><div>X-ray computed microtomography (mCT) results, using the high fluxes from a synchrotron source in conjunction with a novel application of digital volume correlation (DVC) is used to study the damage initiation mechanisms in laminated cross-ply composites. This imaging and analysis framework enables to capture 3D deformation within material volumes with high spatial resolution at macroscopic to submicroscopic scales. We present novel high-resolution experimental measurements that show the sequence by which damage is initiated in a notched composite and how damage progresses under quasi-static loading and cyclic loading conditions. These experimental results serve to develop multi-scale modeling methods that provide deformation response and fatigue life estimates accurately. Damage mechanisms and measurements at these length scales are scarce in the literature.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"373 ","pages":"Article 119708"},"PeriodicalIF":7.1,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227054","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-based multi-step numerical homogenization for mechanical characterization of converted corrugated board","authors":"Tomasz Garbowski ,&nbsp;Aram Cornaggia ,&nbsp;Tomasz Gajewski ,&nbsp;Jakub K. Grabski ,&nbsp;Damian Mrówczyński","doi":"10.1016/j.compstruct.2025.119701","DOIUrl":"10.1016/j.compstruct.2025.119701","url":null,"abstract":"<div><div>This paper presents a two-step inverse-based numerical homogenization framework for the mechanical characterization of converted corrugated board. The methodology combines high-fidelity 3D simulations with global plate modeling, enabling the extraction of homogenized stiffness parameters that account for imperfections such as fluting flattening and local degradation of paper properties during converting processes. In the first step, a 3D finite element model of a corrugated structure is perturbed to simulate realistic imperfections. The mechanical response is computed for multiple loading conditions. A simplified homogenized plate model is then calibrated using inverse optimization to match the 3D response, resulting in an identified plane stress membrane, bending and shear components known from the standard plate and shell theories of orthotropic materials In the second step, these reference stiffness values are used to inversely identify the geometric and material parameters of the constituent layers. The design variables include fluting geometry and the thickness and orthotropic elastic properties of each paper layer. The optimization reveals which parameters have the strongest influence on global behavior, offering insights into process sensitivity. The proposed method provides a robust and efficient path from microstructural features to global mechanical performance, suitable for design and quality control in industrial packaging applications. The framework may also be extended using neural networks for rapid estimation, enabling integration into broader simulation pipelines.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"373 ","pages":"Article 119701"},"PeriodicalIF":7.1,"publicationDate":"2025-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227053","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":"Morphing characteristics of segmented variable stiffness bistable hybrid laminates","authors":"Zheng Zhang ,&nbsp;Jiayang Zhao ,&nbsp;Min Sun ,&nbsp;Guang Zhang ,&nbsp;Dongyi Li ,&nbsp;Shaofei Jiang","doi":"10.1016/j.compstruct.2025.119695","DOIUrl":"10.1016/j.compstruct.2025.119695","url":null,"abstract":"<div><div>Conventional mechanical actuators are limited in aerospace and adaptive architecture applications due to their high complexity and cost. Morphing structures, with their superior adaptability and morphing capabilities, have attracted increasing attention. In this study, a novel thermally responsive bistable structure is developed by introducing a segmented design and hybrid variable stiffness layers into the antisymmetric laminate. The effects of commonly used metal materials, hybrid layer width, and metal layer thickness on the stable configurations, snap behavior, and actuation characteristics of the bistable laminate are systematically investigated. Experimental and numerical results indicate that the incorporation of segmented variable stiffness layers significantly enhances the structural bistable characteristics. Furthermore, by leveraging the potential energy difference between stable configurations and the edge effects of the laminate, a combination of adaptive and active control is achieved. This study offers promising implications for advancing bistable structures in engineering applications.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"373 ","pages":"Article 119695"},"PeriodicalIF":7.1,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227051","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":"Deep virtual model assisted dynamic buckling and reliability analysis of stiffened perovskite solar cells under high-dimensional and categorical factors","authors":"Luo Bo ,&nbsp;Jize Zhang ,&nbsp;Shaoyu Zhao ,&nbsp;Jie Yang","doi":"10.1016/j.compstruct.2025.119696","DOIUrl":"10.1016/j.compstruct.2025.119696","url":null,"abstract":"<div><div>The perovskite solar cell (PSC) emerges as one of the most burgeoning photovoltaic contenders, igniting tremendous research passion within academia and industry. This study addresses the critical yet challenging issue of nonlinear dynamic buckling and reliability analysis for the PSC with agglomerated carbon nanotube reinforced composite (CNTRC) stiffeners under triaxial impacts, simultaneously tackling high-dimensional uncertainties and various categorical factors for the first time. A deep virtual modelling technique, namely Tree-structured Parzen Estimator enhanced Gated Additive Tree Ensemble (TPE-GATE), is newly developed to depict the sophisticated relationship among high-dimensional and heterogenous categorical inputs, and the focused composite nonlinear failure response and reliability accurately and efficiently, circumventing extensive triaxial simulations across vast combinatorial spaces. Statistical information and risk probabilities regarding buckling behaviour are effectively furnished with the deep virtual model, which is essential for safety assessments and serviceability limit state design of the stiffened PSC. In numerical experiments, the superiority of TPE-GATE over popular <em>meta</em>-models is quantitatively demonstrated. Furthermore, parametric studies examining various critical factors influencing deterministic and stochastic failure responses are efficiently conducted using TPE-GATE. Ultimately, unique findings will facilitate informed decision-making and preventive strategies to enhance impact-carrying capacity, reliability-based safety design, and robust optimization of advanced solar composites.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"373 ","pages":"Article 119696"},"PeriodicalIF":7.1,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227048","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":"Characterization of damage onset mechanisms in 3D-woven composites by a novel in situ Eccentric Compression Bending test using x-ray computed tomography and acoustic emission","authors":"Salvador Orenes Balaciart,&nbsp;Yannick Pannier,&nbsp;Marco Gigliotti,&nbsp;David Mellier","doi":"10.1016/j.compstruct.2025.119682","DOIUrl":"10.1016/j.compstruct.2025.119682","url":null,"abstract":"<div><div>This study introduces an innovative Eccentric Compression Bending (ECB) test designed for <em>in situ</em> tomography, aimed at isolating and characterizing the damage onset in 3D woven composites under bending loads. ECB testing facilitates damage analysis imposing a controlled eccentricity, which induces a bending-compression ratio suitable for real-time monitoring of damage initiation mechanisms using acoustic emission and x-ray computed tomography. Key advancements include a novel test setup and an interruption protocol based on AE to halt testing loads precisely at initial damage. The results highlight distinct damage initiation mechanisms for in-axis and off-axis specimens. In-axis specimens reveal initial damage in the form of intra-yarn transverse cracking under tensile stresses and yarn debonding under compression, while off-axis specimens show a complex array of matrix-dominated mechanisms, such as inter-yarn cracking and yarn-matrix debonding, under a multi-axial stress state.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"373 ","pages":"Article 119682"},"PeriodicalIF":7.1,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145226948","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":"Detecting the structural integrity of autonomous underwater vehicles made of hybrid metal-composite plates using ultrasonic guided waves – Simulations and experiments","authors":"Faeez Masurkar","doi":"10.1016/j.compstruct.2025.119703","DOIUrl":"10.1016/j.compstruct.2025.119703","url":null,"abstract":"<div><div>The present research focusses on detecting and localizing different types of damage occurring in a hybrid metal-composite specimen (HMCS) used for building autonomous underwater vehicles through ultrasonic guided waves and permanently attached piezoelectric transducers (PZT). A suitable wave excitation frequency is selected for conducting numerical simulations based on the wave-structure analysis and dispersion diagrams obtained for the HMCS. Accordingly, a Gaussian-windowed tone burst signal centered at a unique frequency of 250 kHz is applied at the PZT to generate guided ultrasonic waves in the test specimen. It is found that, in addition to the higher order guided wave modes, Scholte wave mode is generated and propagates along the water–solid interface. In case of damaged specimens, mode conversion of excited wave mode is observed because of the wave mode-damage interaction. The comparison of time-domain signals obtained from the pristine and damaged specimens shows additional wave packets emerging from the damage to be propagating within the damaged specimens. The corresponding time-domain signals can be processed to detect as well as locate the damage in the specimen. Further, quantitative characterization of different types of damage reveals that an accurate estimation of damage size may not be feasible due to leaking of trapped wave energy within the damaged region to surrounding water. Moreover, the influence of propagation distance on the damage detection is found to be highly sensitive and reveals that an analysis of both in-plane and out-of-plane wave displacements is mandatory to get a reliable estimate of damage detection. Lastly, wave scattering across the damage calculated based on the maximum amplitude of Hilbert envelope shows a direction dependent behavior and an increase of wave amplitude with increase of damage size at specific angular directions. The locations of damage found are well in harmony with the physical locations of damage. Experiments are conducted for all cases considered in the numerical simulations and a good agreement is observed between both. Thus, the proposed methodology is deemed suitable to investigate the structural integrity of submerged HMCS non-destructively using ultrasonic waves and permanently attached cost-effective PZT sensors.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"373 ","pages":"Article 119703"},"PeriodicalIF":7.1,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227049","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}