Thin-Walled Structures最新文献

{"title":"Impact resistance of 3D woven fabrics and composites: A review","authors":"Kunkun Jing ,&nbsp;Suchao Xie ,&nbsp;Yifan Zhang ,&nbsp;Hui Zhou ,&nbsp;Hongyu Yan","doi":"10.1016/j.tws.2025.113262","DOIUrl":"10.1016/j.tws.2025.113262","url":null,"abstract":"<div><div>Three-dimensional(3D) woven composites are widely used as structural materials in fields such as personal protection, aerospace, automotive, and rail vehicles due to their lightweight, high strength, superior out-of-plane impact performance, and high design flexibility. This systematic review focuses on the impact resistance of 3D woven fabrics and their composites, discussing synthetic fibers, natural fibers, and their hybrid configurations. Particular emphasis is placed on the mechanical response of 3D woven fabrics and composites under out-of-plane impact, with a detailed exploration and comparison of the factors influencing their impact performance. The current status of multiscale simulation analysis methods is also highlighted. Finally, the applications of impact-resistant 3D woven fabrics and composites are summarized and some existing problems in this field are elaborated. Overall, this paper summarizes the key progress and future prospects in the field of 3D woven composites and their behavior under impact loading, aiming to provide new insights into the design of new lightweight impact-resistant structural materials.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"213 ","pages":"Article 113262"},"PeriodicalIF":5.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Radiative energy transfer model for high-frequency vibration analysis of functionally graded saturated porous beams","authors":"Yitao Xing ,&nbsp;Qiang Zhong ,&nbsp;Haibo Chen","doi":"10.1016/j.tws.2025.113227","DOIUrl":"10.1016/j.tws.2025.113227","url":null,"abstract":"<div><div>This paper presents an efficient approach for the high-frequency response prediction of finite functionally graded (FG) saturated porous beams based on the radiative energy transfer method (RETM). So far, although extensive research has been conducted on the dynamic analysis of FG saturated porous beams, study on the high-frequency vibration characteristics remains unreported. In this paper, we fill this gap in two main aspects. First, to consider the pore pressure, we use Biot theory instead of Hook’s law to derive the motion-governing equations of FG saturated porous beam, and based on which we analyse the wave propagation characteristics of FG saturated porous beam which are important for high-frequency vibration analysis. Second, based on the RETM, we establish an energy flow model suitable for high-frequency vibration analysis of FG saturated porous beams. Numerical examples show that the proposed approach can accurately predict the energy distributions of saturated porous beams, and the effects of porosity distribution patterns, the porosity coefficient, and the Skempton coefficient on vibration responses are observed.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"213 ","pages":"Article 113227"},"PeriodicalIF":5.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental and numerical investigation on the aging behavior of CFZnL composites in salt spray environment","authors":"Jingang Huang ,&nbsp;Yutong Liu ,&nbsp;Yuliang Hou ,&nbsp;Kang Yang ,&nbsp;Jianwei Shi ,&nbsp;Liang Meng ,&nbsp;Thaneshan Sapanathan","doi":"10.1016/j.tws.2025.113225","DOIUrl":"10.1016/j.tws.2025.113225","url":null,"abstract":"<div><div>This study develops a class of novel carbon-fiber-Zinc-alloy-laminated (CFZnL) composites, and investigates the modulus after salt spray aging. Experimental salt spray aging and tensile tests have been sequentially performed on CFZnL composites and conventional CFRP composites, to assess the aging behavior and residual tensile modulus. It has been observed that Zn alloy layer significantly enhances the aging-resistance due to moisture absorption. In addition, a multiscale modeling approach is proposed to predict the aging behavior and moduli of CFZnL and CFRP composites. Microscale models have been established to obtain the effective diffusion coefficients and effective properties of CFRP layers. Moreover, residual properties of CFRP and Zn alloy layers are calculated using an exponential degradation model. Then, they are introduced in the macroscale model for the tensile simulation. The numerical results concur well with the experimental ones, validating the accuracy of the multiscale modeling approach. It indicates that CFZnL composites with double-side Zn alloy layers possess superior aging-resistance than others in salt spray environment. Finally, the damage mechanisms are analyzed for the aged CFRP and CFZnL composites via experimental observations.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"213 ","pages":"Article 113225"},"PeriodicalIF":5.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Theoretical prediction of buckling deflection for I-shaped steel beams reinforced with bamboo scrimber stiffeners (BSSs)","authors":"Zihan Gong ,&nbsp;Yang Wei ,&nbsp;Jiyang Yi ,&nbsp;Jiawei Chen ,&nbsp;Mingmin Ding ,&nbsp;Hui Liu","doi":"10.1016/j.tws.2025.113263","DOIUrl":"10.1016/j.tws.2025.113263","url":null,"abstract":"<div><div>In response to the buckling instability problem of I-shaped steel beams, a new method of using bamboo scrimber stiffeners (BSSs) to constrain the lateral-torsional buckling (LTB) of the steel beam is proposed. This method uses epoxy adhesive to combine BSSs and pure I-shaped steel beam (PIS) together to work synergistically. 12 full-scale beam specimens were tested and a series of refined finite element models (FEMs) corresponding to PIS and I-shaped steel beams reinforced with BSSs was established to investigate the Mises stress distribution in unstable regions that are difficult to obtain in experiments, which will contribute to buckling analysis. It was found that as the spacing between BSSs decreased, the moment enhancement in the critical buckling point was relatively small, ranging from 5.84 % to 11.94 %, as compared to PIS. However, the critical buckling deflection was significantly improved, with up to 167.40 % increase compared to PIS. Numerical and experimental results both show that BSSs alter the instability behavior of I-shaped steel beams, shifting rapid LTB failure to a slower lateral torsion of the web plate and localized buckling of compressed flanges between BSSs. To further expand the application scenarios, 17 additional simulation specimens were established to study the reinforcement effect of BSSs with varying lengths and quantities on beams with different clear spans. According to the experimental and numerical results, a critical buckling deflection prediction formula for I-shaped steel beam reinforced with BSSs was derived, which achieved good results and provided theoretical basis for practical engineering applications.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"213 ","pages":"Article 113263"},"PeriodicalIF":5.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143767833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the impact of cable nets on the membrane roof failure of air-supported membrane structures under fire conditions","authors":"Yaning Zhang ,&nbsp;Ying Sun ,&nbsp;Bo Liu ,&nbsp;Tengfei Wang ,&nbsp;Yang Yu ,&nbsp;Qiming Zhu ,&nbsp;Zhenggang Cao","doi":"10.1016/j.tws.2025.113247","DOIUrl":"10.1016/j.tws.2025.113247","url":null,"abstract":"<div><div>Few studies have investigated the fire safety of air-supported membrane structures with cable nets. Given the multiple physical fields and scales involved, this study proposes a simplified sequential thermal-mechanical analysis method to study the impact of cable nets on membrane roof failure. Three key issues in the simulation are addressed through tests on heat transfer, cable force measurement and fire damage. Specifically, a two-dimensional heat transfer analysis is applied to determine the fine-scale temperature distribution within cable net, based on the temperature field of membrane roof by large eddy simulation. The cable-membrane interaction under high temperature is comprehensively analyzed using co-nodal and friction-slip models. The Tsai-Hill failure criterion is employed to characterize the failure of the stressed membrane roof. Finally, a parametric analysis is carried out on a full-scale structure, considering different cable net types, fire power, fire growth rates, and fire positions. Results show that when the maximum temperature of the membrane roof is below 70 °C, the influence of non-uniform temperature field on structural mechanical properties is minimal. The cable net reduces membrane roof stress under fire conditions, slightly raising the safe temperature limits of the membrane roof. However, the faster temperature rise rate of the membrane roof during fires leads to less contribution of the cable nets in delaying the failure time. The insights could help the development of fire safety standards for air-supported membrane structures.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"213 ","pages":"Article 113247"},"PeriodicalIF":5.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recent advances in machine learning guided mechanical properties prediction and design of two-dimensional materials","authors":"Runkai Liu ,&nbsp;Shu Lin ,&nbsp;Jing Wan ,&nbsp;Le Li ,&nbsp;Guoqiang Zhang ,&nbsp;Huasong Qin ,&nbsp;Yilun Liu","doi":"10.1016/j.tws.2025.113261","DOIUrl":"10.1016/j.tws.2025.113261","url":null,"abstract":"<div><div>Two-dimensional (2D) materials have garnered significant attention due to their exceptional physical properties and potential for diverse applications. Recent advances in the machine learning (ML) based methodologies have opened new avenues for predicting and designing the mechanical behaviors of these materials. This review comprehensively examines ML-based methodologies that predict key mechanical properties including fracture strength, elastic modulus, and Poisson's ratio, by integrating intrinsic structural features, defect characteristics, external loading conditions, and environmental influences. The ML-based ways of crack propagation and fracture mechanisms are thoroughly explored. Furthermore, high-throughput screening, reverse design and model+data based intelligence design of 2D materials are highlighted for accelerating the discovery and engineering of 2D materials with tailored mechanical properties. Emerging challenges such as the development of universal descriptors and potentials, multi-field coupling analysis, the integration of experimental, theoretical, and simulation datasets, and interpretable ML-based approach are discussed alongside future perspectives aimed at the design of high-performance 2D materials.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"213 ","pages":"Article 113261"},"PeriodicalIF":5.7,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Frequency multiplication resonances of spatial four-direction braided composite sandwich cylindrical shells with three-dimensional lattice pyramid cores exposed to harmonic loads and thermal environments","authors":"Bocheng Dong,&nbsp;Rui Zhao,&nbsp;Kaiping Yu,&nbsp;Jinze Li","doi":"10.1016/j.tws.2025.113260","DOIUrl":"10.1016/j.tws.2025.113260","url":null,"abstract":"<div><div>In response to the current status of unfulfilled nonlinear dynamics prediction and evaluation tools for novel lightweight spacecraft components, the matched theoretical model and solution procedures for spatial four-direction braided composite sandwich cylindrical shells with three-dimensional lattice pyramid cores are proposed. This will reveal their nonlinear free vibration characteristics and frequency multiplication resonant behaviors. In particular, the nonlinear thermal strains and energy exerted by the thermal expansions are considered by the Green-Lagrange function. The constructed theoretical formulation achieves the equivalent mechanical performance characterization of the three-dimensional lattice pyramid core and spatial four-way braided composites. Based on these explicit expressions, the nonlinear dynamical equations of such a structure subjected to the uniformly distributed harmonic load and thermal environment are derived by employing the first-order shear deformation theory, allowing for the von Kármán geometrical large deformation assumption and the Euler-Lagrange equation. The Green's thermal strain addition terms are introduced. The nonlinear frequencies with initial magnitudes, the amplitude-frequency attributes, and phase trajectories of the primary, super-frequency, and sub-frequency resonances are analytically derived using the multiscale approach. Also, comparison studies are conducted to verify the correctness of the modelling techniques and output data. The manifestations and mechanisms in different nonlinear vibration behaviors are disclosed. Finally, the impact of configuration adjustments and environmental factors on the anti-vibration capability of the structure is characterized via prime dynamic indicators. Some adjustment strategies are reported for pursuing low resonant amplitudes and narrow resonant regions.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"213 ","pages":"Article 113260"},"PeriodicalIF":5.7,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143855136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of the strength and behaviour of single-coped beam under combined bending, shear and axial loads","authors":"Michael C.H. Yam ,&nbsp;Xiuzhang He ,&nbsp;Mingyuan Zhang ,&nbsp;Jinqi Yang ,&nbsp;Ke Ke","doi":"10.1016/j.tws.2025.113258","DOIUrl":"10.1016/j.tws.2025.113258","url":null,"abstract":"<div><div>Coped beams are often used as a secondary member to support a floor slab system. The coped beam ends are achieved by removing the flange(s) of the beam to facilitate the connection to the main beam. Although coped beams are mainly used to resist gravity loads in a building structure, the beams may be subjected to axial force due to the transfer of lateral loads such as wind loads from the building façade to the lateral load resisting system. Hence, the coped beams are subjected to combined loadings of bending, shear and axial force. However, existing design methods for single-coped beams do not account for the influence of axial loads and the combined load effects. This study presents an experimental and numerical investigation of the structural behaviour and local web buckling strength of single-coped beams under combined bending, shear and axial loading scenarios. Ten full-scale tests of single-coped beams subjected to combined loadings were conducted with varied test parameters including the axial force level, cope details and web slenderness ratio. In general, all the test specimens failed by local web buckling at the coped region. The test results demonstrated that the ultimate strength of the coped beam specimens subjected to gravity loads decreased with the presence of compressive axial force. For instance, a compressive axial force corresponding to 4 % of the section yield load reduced the ultimate strength of a coped beam specimen by 10.1 % when comparing to that without the compressive force. Finite element (FE) analyses were subsequently conducted to further explore the effect of axial force on the strength and behaviour of coped beams with various cope details. It was found that the existing design methods, which do not account for the combined load effects, could not produce satisfactory predictions of the web buckling strength of single-coped beams when compared to the test and FE results. To address these shortcomings, a design equation was proposed to evaluate the strength of the coped beams under combined bending, shear and axial loads. The test-to-predicted ratios based on the proposed design equation ranged from 0.94 to 1.22 with a mean value of 1.05 and a coefficient of variation of 0.07. A reliability analysis was conducted, and the results indicated that a partial factor of <em>γ_M</em> = 1.09 was suggested for practical application to ensure safety and reliability in structural design.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"213 ","pages":"Article 113258"},"PeriodicalIF":5.7,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Locally resonant metamaterial plate with cantilever spiral beam-mass resonators and various piezoelectric defects for energy harvesting","authors":"Y.X. Hao ,&nbsp;Y.J. Huo ,&nbsp;W. Zhang","doi":"10.1016/j.tws.2025.113259","DOIUrl":"10.1016/j.tws.2025.113259","url":null,"abstract":"<div><div>In this paper, a locally resonant metamaterial sandwich plate with different types of piezoelectric defects is proposed by selectively replacing the cantilever spiral beam-mass resonator with that containing two piezoelectric material layers. Firstly, a mechanical model of the piezoelectric cantilever spiral beam is considered, and its cross-sectional bending stiffness and equivalent stiffness are derived. The natural frequency and response voltage are theoretically calculated and analyzed. It is found that the thicknesses of piezoelectric layer and the spiral beams have a crucial influence on the natural frequency and response voltage of the system. The dynamic equations governing the vibration of the defect locally resonant metamaterial sandwich plate is given. Within the framework of the plane wave expansion method, the band gap structure and defect band frequency are analytically obtained. On this basis, the influence of various defects of the metamaterial sandwich structures, including various point defect and line defect on the transmission loss and response voltage are explored. The results indicate that two-point defects exhibit significant advantages in energy concentration and capture efficiency when the resistance is high. While as the number of defects increases, the energy localization effect gradually disperses, leading to gradual weakening in capture efficiency. Present work achieves the combination of vibration control and energy harvesting in the same system, and provides new ideas for fields such as piezoelectric energy harvesting structures and self-powered devices.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"213 ","pages":"Article 113259"},"PeriodicalIF":5.7,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental studies on screw connections in CFS shear wall panels subjected to different angles of shear under monotonic loading","authors":"V.Y. Palagala,&nbsp;M. Nithyadharan","doi":"10.1016/j.tws.2025.113251","DOIUrl":"10.1016/j.tws.2025.113251","url":null,"abstract":"<div><div>The nonlinear behaviour of cold-formed steel (CFS) shear wall panels is primarily governed by the behaviour of the screws connecting the CFS framing and sheathing. The screws in the wall panel experience shear either parallel or at oblique angles with reference to the free edge of the sheathing. However, existing studies characterise the screw connection behaviour subjected to shear, either parallel or perpendicular to the free edge of the sheathing, which fails to realistically capture the behaviour of screw connections subjected to shear at different angles. Hence, this study proposes a novel experimental test setup to characterise the screw connection behaviour between CFS member and calcium silicate board where the screws experiences shear at different angles (parallel, perpendicular and oblique). The experimental program consists of 160 screw connection specimens tested under monotonic loading. The variability in the test matrix includes a) screws subjected to different angles of shear (0°, 22.5°, 45°, 67.5° and 90°), b) different board thicknesses (10 mm and 12 mm) and edge distances (10 mm and 25 mm) from the free edge of the sheathing, c) orientation of board (longitudinal and transverse directions), and d) under monotonic tension and compression loading. The results show that the angle of shear loading, and edge distance are the critical parameters that influence the load-displacement response of the screw connection under tensile loading. Further, the test data was used to develop design equations to predict the ultimate shear strength considering different angles of shear.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"213 ","pages":"Article 113251"},"PeriodicalIF":5.7,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}