Composite Structures最新文献

{"title":"Enlarged cell size induces ultra-high specific strength in octahedral lattice structure","authors":"Guoxiang Shen ,&nbsp;Jiazheng Sun ,&nbsp;Nanqi Kong ,&nbsp;Zhengchen Han ,&nbsp;Hongwei Zhao ,&nbsp;Luquan Ren ,&nbsp;Zhichao Ma","doi":"10.1016/j.compstruct.2025.119472","DOIUrl":"10.1016/j.compstruct.2025.119472","url":null,"abstract":"<div><div>Ti6Al4V lattice structure shows a broad application prospect in the biomedical field owing to superior biocompatibility, excellent shock resistance and energy absorption ability. However, attempts on structural design and cell configuration are urgent to make since the lattice structure exhibits a trade-off between lightweight and high strength. Here, Ti6Al4V octahedral structures with different cell sizes were manufactured by selective laser melting, and their mechanical responses at different strain rates were evaluated. The octahedral structures exhibit an inverse size effect, i.e., the enlarged cell size performed higher strength. Particularly, the compressive strength of the large octahedral lattice structure reached 198.91 MPa (an enhancement of 203.17 %) with a porosity of 95.23 %, which made it the highest specific strength (941.81 KN·m/Kg) Ti6Al4V lattice structure prepared by the SLM process reported to date. Furthermore, the capacity of lattice structure to resist cyclic failure during densification stages was defined as destabilization resistance, and it was found that the destabilization resistance decreased with increasing strain rate. Eventually, the fracture morphology of the octahedral structure indicated that the fracture at the nodes was typically brittle, while the intermediate fracture in the strut was a mixed fracture of brittle and ductile.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"371 ","pages":"Article 119472"},"PeriodicalIF":6.3,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144587600","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":"Quasi-static failure and stable crushing of mechanically-fastened carbon-fibre thermoplastic composite joints","authors":"P.J. Silva Campos ,&nbsp;D. Dalli ,&nbsp;I.A. Rodrigues Lopes ,&nbsp;A. Arteiro","doi":"10.1016/j.compstruct.2025.119414","DOIUrl":"10.1016/j.compstruct.2025.119414","url":null,"abstract":"<div><div>Mechanically-fastened composite joints are widely used in aeronautical applications. In this work, a uni-directional (UD) carbon fibre-reinforced thermoplastic material system, stacked in a quasi-isotropic (QI) layup, is tested using specimens of the same thickness and different widths (<span><math><mi>w</mi></math></span>), loaded with 6 mm-diameter (<span><math><mi>D</mi></math></span>) pinned or bolted joints. In addition, the energy absorption capability is assessed using extended bearing tests for the two types of joints. As expected, the fastener type as well as the <span><math><mrow><mi>w</mi><mo>/</mo><mi>D</mi></mrow></math></span> and <span><math><mrow><mi>e</mi><mo>/</mo><mi>D</mi></mrow></math></span> ratios are key parameters for the global behaviour of the joint. The failure mode changes from net-tension to shear-out and bearing when the geometry of the specimen changes from 12 mm to 24 mm of width for both types of fastener. A steady-state crushing plateau is attained for all studied geometries when using a pin as a fastener except for the smallest width specimen. For the bolt-bearing tests, steady-state crushing was only possible with the extended bearing geometry. The presented results are at least comparable to those of advanced thermoset composite joints, with a significant delay of the first load drop with respect to the laminate compressive strength, showing that thermoplastic composite joints can be as strong and efficient as their thermoset counterparts.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"371 ","pages":"Article 119414"},"PeriodicalIF":6.3,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614724","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 integrated multi-task transfer learning for damage detection, localization, and severity assessment of laminated composite plate","authors":"Muhammad Muzammil Azad ,&nbsp;Jaehyun Jung ,&nbsp;Heung Soo Kim ,&nbsp;Olivier Munyaneza ,&nbsp;Jung Woo Sohn ,&nbsp;Bin Huang","doi":"10.1016/j.compstruct.2025.119478","DOIUrl":"10.1016/j.compstruct.2025.119478","url":null,"abstract":"<div><div>Accurate damage assessment in laminated composites is vital for ensuring safety and efficiency in aerospace, automobile and marine applications. However, conventional approaches typically rely on extensive preprocessing of raw data and are restricted to addressing only one task at a time using separate models. This study aims to present a comprehensive framework that performs damage detection, localization, and severity assessment simultaneously. It proposes using raw Lamb wave data within an integrated multi-task transfer learning (IMTTL) framework that addresses all three aspects concurrently using a 1D convolutional neural network (1D-CNN) as the core model. In the proposed method, damage detection is conducted using a 1D-CNN model applied directly to raw data from laminated composites, eliminating the need for signal preprocessing and manual feature extraction. As such, the transfer learning concept is utilized in the IMTTL model, where the pre-trained damage detection model is fine-tuned for damage localization and severity assessment. The proposed method is validated across three distinct damage severity levels at nine different locations. Additionally, Bayesian optimization was employed to optimize the hyperparameters of the IMTTL framework. The optimized IMTTL model achieved 100.00% accuracy in damage detection, an R² of 93.82% for damage localization, and 87.04% accuracy in severity assessment. These results demonstrate that the proposed method offers an effective solution for laminated composite plates with integrated damage detection, localization, and severity assessment.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"371 ","pages":"Article 119478"},"PeriodicalIF":6.3,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144587465","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":"Nonlinear dynamic analysis of the double-layer lattice sandwich circular plate and nonlinear vibration absorber coupled system","authors":"Zhengzhe Li ,&nbsp;Rui Zhong ,&nbsp;Ruihua Wang ,&nbsp;Qingshan Wang ,&nbsp;Bin Qin","doi":"10.1016/j.compstruct.2025.119475","DOIUrl":"10.1016/j.compstruct.2025.119475","url":null,"abstract":"<div><div>Building upon traditional linear vibration absorbers, a nonlinear dynamic vibration absorber (n-DVA) incorporating nonlinear springs is developed. Simultaneously accounting for both geometric nonlinearity and connection nonlinearity, a multivariate nonlinear dynamic analysis is performed on the coupled system comprising a double-layer lattice sandwich circular plate with functionally graded carbon nanotube (FG-CNT) face sheets (DLLSCP-CNT) and n-DVA. Based on the first-order shear deformation theory (FSDT), the Spectro-Geometric Method (SGM) combined with the incremental harmonic balance (IHB) method is employed to derive the nonlinear amplitude-frequency responses of the DLLSCP-CNT under n-DVA interaction, which is further analyzed together with nonlinear time-domain characteristics and displacement spectra under harmonic excitation. The convergence and accuracy of the proposed nonlinear coupled system model are rigorously validated through extensive numerical benchmarks against existing literature and numerical solutions. Leveraging this validated model, parametric investigations are systematically conducted on critical design factors including typology and stiffness characteristics of n-DVA, non-uniform CNT distribution across face sheets, non-uniform thickness distribution of three-layer skins in sandwich structures, lattice geometric configurations and Rayleigh damping coefficients, which pioneers the dynamic characterization of coupled systems incorporating both structural geometric nonlinearities and nonlinear interconnections in vibration absorbers.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"371 ","pages":"Article 119475"},"PeriodicalIF":6.3,"publicationDate":"2025-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144579849","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":"Mechanical properties and durability of ultra-high performance concrete containing steel fibers","authors":"Piotr Smarzewski","doi":"10.1016/j.compstruct.2025.119471","DOIUrl":"10.1016/j.compstruct.2025.119471","url":null,"abstract":"<div><div>This study investigates the long-term mechanical, physical, and durability properties of ultra-high performance concrete (UHPC) with steel fiber addition. Tests included porosity, water absorption, density, compressive, tensile, and flexural strength, fracture energy, energy absorption, toughness indices, static and dynamic elastic moduli, ultrasonic pulse velocity (UPV), and frost resistance. Digital image correlation (DIC) was used to analyze cracking, damage progression, and failure modes. Steel fiber reinforcement significantly enhanced compressive strength at 730 days and flexural and splitting tensile strengths at 28, 56, and 730 days. Notable gains in fracture energy and energy absorption were observed at 28 days. Slight improvements in elastic moduli and slight reductions in UPV were recorded for fiber-reinforced mixes. After 180 freeze–thaw cycles, increased mass loss was noted with higher fiber content, indicating reduced frost resistance, likely due to higher porosity and water absorption compared to fiber-free UHPC. The results demonstrate that durable UHPC can be produced without heat treatment or high-pressure compaction, using coarse aggregate, natural sand, and standard-grade steel fibers. This approach offers a practical and economical alternative for UHPC production with enhanced long-term mechanical performance.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"371 ","pages":"Article 119471"},"PeriodicalIF":6.3,"publicationDate":"2025-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144571346","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":"Customized design of lattice structures in performance based on dispersion strengthening and multiple mechanical response","authors":"Zhongfa Mao ,&nbsp;Weichao Wang ,&nbsp;Wen Peng ,&nbsp;Xiulin Ji ,&nbsp;Fengtao Wang","doi":"10.1016/j.compstruct.2025.119454","DOIUrl":"10.1016/j.compstruct.2025.119454","url":null,"abstract":"<div><div>Lattice structure has been widely used in construction, medicine, aerospace, and other fields due to the advantages of lightweight, high specific strength, and excellent energy absorption. However, the homogeneous structure still faces the danger of sudden failure in the shear band when loaded beyond the yield point, which brings many limitations to the popularization and application of the lattice structure. In this research, a design method of strengthening and toughening for lattice structures is proposed by introducing a dispersion strengthening mechanism in crystalline materials and multiple mechanical response mechanisms based on a dual-scale configuration design. As such, various composite structures are designed and manufactured to verify the feasibility of this approach. Their mechanical response and deformation mechanisms are investigated through quasi-static compression experiments and finite element methods. The results indicate that the dispersion strengthening mechanism can effectively inhibit the rapid decreases in stress and propagation of shear bands, thus improving the lattice structure’s mechanical properties and energy absorption. The configuration of the hard phase plays a vital role in regulating the failure mode of the lattice structure. This approach paves the way for developing excellent comprehensive performance lattice structures through dual-scale design based on multiple mechanical responses.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"371 ","pages":"Article 119454"},"PeriodicalIF":6.3,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144596883","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":"Lightweight modified paper-based composites with tunable dielectric properties based on high-aspect-ratio conductive dipoles","authors":"Xiaojiao Zhao ,&nbsp;Weihao Tu ,&nbsp;Xin Xiu ,&nbsp;Zhengsheng Huang ,&nbsp;Sicheng Liu ,&nbsp;Kang Guan ,&nbsp;Jin Long ,&nbsp;Jian Hu ,&nbsp;Yi Wang ,&nbsp;Wenquan Che","doi":"10.1016/j.compstruct.2025.119476","DOIUrl":"10.1016/j.compstruct.2025.119476","url":null,"abstract":"<div><div>Paper-based composites with tunable dielectric properties offer significant potential for lightweight, flexible broadband electromagnetic (EM) wave absorption. This study introduces a novel modified paper-based composite (MPC) featuring precisely controlled conductive dipoles, screen-printed onto lightweight aramid paper. By controlling the total dipole volume and spatial distribution density, we identify the aspect ratio (AR) as the critical structural parameter governing dielectric behavior. Through complementary experimental measurements and finite-element simulations, we demonstrate that increasing dipole AR from 1 to 200 significantly enhances frequency-dependent dielectric tunability across the S–Ku bands, yielding a remarkably wide permittivity range (ε′ from − 21.3 to 124.7, ε″ from 388.8 to 0.62). The underlying mechanisms of this tunability are elucidated through circuit model theory and effective medium approximations. Based on these insights, a multilayer MPC-based absorber is designed and fabricated, exhibiting exceptional performance: a broad relative absorption bandwidth of 136.8 % (3–16 GHz, reflection coefficient &lt; − 10 dB), ultra-thin electrical thickness of 0.097λ at 2 GHz (14.5 mm), and a low density (60 kg/m3).Our research establishes the geometric anisotropy of conductive elements as a powerful and precise mechanism for tailoring the dielectric response of paper-based composites, opening new pathways for designing next-generation EM wave-absorbing materials.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"371 ","pages":"Article 119476"},"PeriodicalIF":6.3,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144632155","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":"Process-induced residual stresses of CFRP laminates with integrated rubber layer","authors":"Jing Wu ,&nbsp;Yutong Fu ,&nbsp;Linhui Gong ,&nbsp;Jia Li ,&nbsp;Dan Xia ,&nbsp;Jia-Yu Li ,&nbsp;Fang-Liang Guo ,&nbsp;Yuan-Qing Li ,&nbsp;Shao-Yun Fu","doi":"10.1016/j.compstruct.2025.119461","DOIUrl":"10.1016/j.compstruct.2025.119461","url":null,"abstract":"<div><div>The low impact damage resistance of carbon fiber reinforced polymer (CFRP) composite structures is one of the major obstacles to their wide applications. Thus, the rigid-flexible coupled structures of CFRP/rubber composite laminates have been recently developed to overcome this problem. However, due to the mismatch of thermal expansion and chemical shrinkage etc. between CFRP and rubber, the process-induced residual stresses would generate and significantly influence the mechanical behavior of the laminates. In this study, a numerical simulation is established to precisely predict the process-induced residual stresses. Firstly, a theoretical viscoelastic framework for the curing process of CFRP/rubber laminates is proposed, which considers the heat transfer, curing kinetics and mechanical behavior of both CFRP and rubber. Secondly, based on the theoretical framework, the curing process of CFRP/rubber laminates is simulated by finite element method, which is then verified by the experimental results of residual stresses. Finally, the effects of curing temperature, heating rate, and rubber thickness on the residual stresses of rigid-flexible laminated structures are discussed. This work could provide theoretical guidance for design and optimization of the process parameters of CFRP/rubber laminates with significant implications for end usages.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"371 ","pages":"Article 119461"},"PeriodicalIF":6.3,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144556987","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":"Analysing the influence of delamination on composite structures using modal analysis and statistical indices","authors":"Matteo Zanetti ,&nbsp;Doglas Negri ,&nbsp;Dirk Vandepitte ,&nbsp;Volnei Tita ,&nbsp;Ricardo De Medeiros","doi":"10.1016/j.compstruct.2025.119427","DOIUrl":"10.1016/j.compstruct.2025.119427","url":null,"abstract":"&lt;div&gt;&lt;div&gt;Composite materials are increasingly used in industries like aerospace and automotive, serving as critical structural components. Understanding the behaviour of these materials throughout their life-cycle is crucial. Structural Health Monitoring (SHM) systems have been developed to address this need, aiming to detect, locate, and quantify damage while estimating the remaining life of the structure in real-time. These systems employ various techniques tailored to the potential damage that may occur in laminated structures. In this study, vibrational techniques, specifically modal analysis, were used to detect delamination damage in a Carbon Fibre Reinforced Polymer (CFRP) structure. Modal analysis involves obtaining the Frequency Response Functions (FRF) of the structure, which describe its behaviour under specific excitation frequencies. This response depends on the geometry, stiffness, and damping of the structure, with damage altering these parameters, thus it can be possible to detect damage. Composite beams investigated in the present work had delamination in two different positions with three different sizes. Three laminate configurations (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mo&gt;[&lt;/mo&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;12&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;]&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;, &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mo&gt;[&lt;/mo&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;mo&gt;/&lt;/mo&gt;&lt;mn&gt;45&lt;/mn&gt;&lt;mo&gt;/&lt;/mo&gt;&lt;mn&gt;90&lt;/mn&gt;&lt;mo&gt;/&lt;/mo&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;]&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;, and &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mo&gt;[&lt;/mo&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;mo&gt;/&lt;/mo&gt;&lt;mn&gt;45&lt;/mn&gt;&lt;mo&gt;/&lt;/mo&gt;&lt;mn&gt;30&lt;/mn&gt;&lt;mo&gt;/&lt;/mo&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;45&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;]&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;) were analysed. Computational analysis was performed by creating a finite element model with free-free boundary conditions to simulate laboratory testing. Amplitude and phase parameters were identified from the FRFs to be used in damage and statistical indices. All indices were analysed in terms of the damage imposed in the composite beams, highlighting the strengths and weaknesses of each index for damage detection and the influence of delamination on the structure’s behaviour. Both types of indices effectively quantified damage, but the literature damage indices demonstrated a more stable and superior response in terms of sensitivity compared to the statistical ones. Additionally, laminate symmetry emerged as a significant factor; indices returned consistent values even when delamination position changed. In contrast, when symmetry was absent, the indices varied in terms of the delamination position. Based on the analysis of the indices, a Design of Experiments (DoE) analysis was applied to the geometry to gain further insights into the influence of delamination. ","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"371 ","pages":"Article 119427"},"PeriodicalIF":6.3,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144596882","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 efficient computational model for the electromechanical performance of flexible piezoelectric composites based on a multi-scale approach","authors":"Weixuan Zhang ,&nbsp;Yanheng Guo ,&nbsp;Kecheng Li ,&nbsp;Jin Yin ,&nbsp;Di Wu ,&nbsp;Yishou Wang","doi":"10.1016/j.compstruct.2025.119462","DOIUrl":"10.1016/j.compstruct.2025.119462","url":null,"abstract":"<div><div>The finite element analysis (FEA) model for flexible piezoelectric composites (FPC) provides valuable insights for assessing the sensing and actuation performance of FPC. An accurate and efficient FPC computational model is both a necessary and sufficient condition for performance analysis. However, Currently, most studies use shell elements to evaluate FPC performance, without considering out-of-plane piezoelectric parameters. While the 2D FPC model offers fast computation speeds, the results often underestimate the actual values. Additionally, by neglecting the Z-direction properties, these models fail to capture the polarization direction differences between D31 and D33 FPC effectively. Therefore, this study proposes an efficient computational 3D model using a multi-scale analysis framework. This model incorporates the UFM-Ruess-Hill equivalent electromechanical parameter calculation principle, multi-scale geometric model simplification, and equivalent electric field intensity substitution methods. The developed model not only accounts for the effects of polarization direction but also restores the FPC’s structural integrity. Compared with the unsimplified FPC model, the high-efficiency computational model reduces the steady-state actuation computation time from 3 min and 25 s to 17 s under identical hardware conditions. The transient actuation computation time is reduced from 6 h, 31 min, and 54 s to 44 min and 59 s. The model yields an average error of 5.13% in FPC sensing performance and 3.67% in actuation performance.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"371 ","pages":"Article 119462"},"PeriodicalIF":6.3,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144571343","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}