Thin-Walled Structures最新文献

{"title":"Eccentric compression behaviour of stainless steel-recycled aggregate concrete-carbon steel double skin tubular (SRCDST) columns","authors":"Yukai Zhong,&nbsp;Chengzhang Wu,&nbsp;Yupei Guo,&nbsp;Airong Liu,&nbsp;Jiyang Fu","doi":"10.1016/j.tws.2025.114006","DOIUrl":"10.1016/j.tws.2025.114006","url":null,"abstract":"<div><div>This paper presents experimental and numerical studies on the behaviour of stainless steel-recycled aggregate concrete-carbon steel double-skin tubular (SRCDST) columns subjected to eccentric compression. The experimental study included material tests of concrete and steel tubes, measurements of initial global geometric imperfections and eccentric compression tests of twelve SRCDST column specimens, which were designed with varying initial eccentricities, recycled coarse aggregate replacement levels and hollow ratios. The test results of failure loads, deformation responses and failure modes were reported, and the ductility performance, lateral deformation development and longitudinal strain distributions were analysed. Finite element models were developed, validated against the experimental data and subsequently employed to conduct parametric studies covering a wide range of geometric dimensions and loading combinations. Three design codes, including Chinese technical specification, European code and American specification, were evaluated for their applicability to eccentrically loaded SRCDST columns against the test and numerical results. The evaluation results generally revealed that the Chinese technical specification offered conservative and slightly scattered failure load predictions for eccentrically loaded SRCDST columns, while the European code resulted in accurate and consistent failure load predictions and the American specification provided accurate predictions but with slight scatter. Finally, a revised design method was proposed based on the Chinese technical specification, demonstrating improved design accuracy and consistency.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114006"},"PeriodicalIF":6.6,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119379","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":"Development and experimental study of self-centring connections incorporating thin-walled SMA plates for seismic retrofitting of steel frames","authors":"Zeyu Zhou ,&nbsp;Xuhong Zhou ,&nbsp;Michael C.H. Yam ,&nbsp;Yun Huang ,&nbsp;Ke Ke","doi":"10.1016/j.tws.2025.114011","DOIUrl":"10.1016/j.tws.2025.114011","url":null,"abstract":"<div><div>This research reported the development of self-centring connections equipped with thin-walled shape memory alloy plates (SMA-plate connections) for seismic retrofitting of steel frame structures, where the SMA plates primarily undergo ‘tension-release’ responses to provide moment resistance, self-centring driving force, and energy dissipation for the connection. An experimental study was conducted on four SMA-plate connection specimens to examine their hysteretic behaviour under different loading protocols. In addition, given the limited thickness of the SMA plates commercially available, the feasibility of using double layers of thin-walled SMA plates in the connection was examined in the tests. A hybrid modelling technique for SMA plates was used to conduct numerical simulations of the test results. Design equations were derived to predict the skeleton responses of the specimens. The experimental results demonstrated that the SMA-plate connection specimens exhibited flag-shaped self-centring hysteretic responses within a certain range of deformation. The SMA plates played a key role in achieving satisfactory self-centring performance and stable hysteretic responses, while the configuration of the web connector also affected the residual deformations and energy dissipation capacities. The viability of the double-layer configuration was evidenced by the enhanced strength, stiffness, and energy dissipation. The developed numerical models were capable of reproducing the deformed shapes and hysteresis curves of the specimens. The rationality of the design equations was validated by the good agreement between the predicted skeleton curves and those measured in the tests.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114011"},"PeriodicalIF":6.6,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267991","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":"Mix vibration control of an elastic beam system with two nonlinear factors","authors":"Zheng Li,&nbsp;Yuhao Zhao","doi":"10.1016/j.tws.2025.114008","DOIUrl":"10.1016/j.tws.2025.114008","url":null,"abstract":"<div><div>Given that when nonlinear oscillators are used in the coupling beam system to achieve system vibration control, other nonlinear factors may be introduced due to unfavorable factors such as nonlinear changes in the working characteristics of the connecting devices. At this time, the coupled beam system simultaneously has two nonlinear factors and is affected by their interaction. However, existing research has not explored the influence of the coexistence and interaction of two nonlinear factors on the dynamic behavior of the system. To achieve more comprehensive vibration control of the coupled beam system, this study innovatively proposes a nonlinear mixed control element (NMCE) that incorporates two nonlinear factors. A vibration physical model of a beam system with a nonlinear mixed control system (NMCS) consisting of the NMCE and an additional beam is constructed. Underpinned by the correctness of the calculations, the NMCE’s working characteristics and the dynamic behavior of the beam system influenced by its core parameters are systematically investigated and analyzed. The numerical analysis shows that the NMCE has a significant vibration suppression effect and effectively reduces the vibration amplitude of the extra resonance region. Furthermore, the NMCE has linear and nonlinear work characteristics. It can be found that the nonlinear stiffness of the NMCE leads to the complex nonlinear response of the main beam during vibration, which leads to the targeted energy transfer phenomenon. The nonlinear stiffness combination of the NMCE in the amplitude suppression zone offers an efficient range for parameter selection to attenuate the vibrational response of the beam system. It demonstrates that the introduction of the NMCE provides the possibility for efficient vibration control of beam structures with multiple nonlinear factors in engineering.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114008"},"PeriodicalIF":6.6,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145159357","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":"An updated Lagrangian computational homogenization framework for large deformation of thin composite beams/shells","authors":"Tianyun He ,&nbsp;Xiaowei Bai ,&nbsp;Qun Huang ,&nbsp;Jie Yang ,&nbsp;Hamid Zahrouni ,&nbsp;Heng Hu","doi":"10.1016/j.tws.2025.113999","DOIUrl":"10.1016/j.tws.2025.113999","url":null,"abstract":"<div><div>This paper proposes a novel computational homogenization framework for the analysis of large rotations and finite strains in thin composite beams/shells. The macroscopic beam/shell is modeled as a continuum beam/shell described by the Kirchhoff shell kinematics (or Euler beam kinematics) within the updated Lagrangian formulation. At the micro-scale, through-thickness representative volume elements (RVEs) are considered and embedded at each integration point of the macroscopic beam/shell via a local co-rotational Cartesian coordinate system, thereby effectively decoupling the microscopic problem from the influence of macroscopic rotations. The RVEs are subjected to in-plane boundary conditions and zero out-of-plane tractions, representing the free top and bottom surfaces. Several numerical examples (e.g., large rotation, finite strain and buckling of thin composite beams and plates) are performed with comparison to the referenced direct numerical simulation. The results demonstrate that the proposed homogenized beam/shell models can accurately and efficiently predict both the macroscopic large deformations and the microscopic stress distributions, e.g., the multi-scale model achieves about 70% efficiency improvement while using the same number of iterations. This paper is believed to provide a powerful computational tool for the analysis of in-plane periodic thin composite beams/shells.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 113999"},"PeriodicalIF":6.6,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097485","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":"Effects of heat-affected zone on cyclic behaviour of laser-cladding-produced stainless-clad bimetallic steels","authors":"Lan Kang ,&nbsp;Wenjie Du ,&nbsp;Nan Hu ,&nbsp;Xinpei Liu ,&nbsp;Wei Sun ,&nbsp;Lijun Yuan","doi":"10.1016/j.tws.2025.113997","DOIUrl":"10.1016/j.tws.2025.113997","url":null,"abstract":"<div><div>Laser-cladding (LC) additive manufacturing has been widely applied in repairing steel structures. Unlike conventional methods, the LC process forms a metallurgically graded heat-affected zone (HAZ) between the LC sheet and the substrate. However, the influence of the HAZ on the cyclic performance of LC-produced stainless-clad bimetallic steels remains insufficiently understood. To address this, nine groups of specimens with varying clad ratios (<em>β</em>) were designed to either include or exclude the HAZ and to cover a range of HAZ ratios (<em>λ</em>). Microhardness testing, microstructural characterisation, and strain-controlled uniaxial cyclic tests were performed to assess mechanical performance. The HAZ exhibited a pronounced hardness gradient due to grain refinement and decarburisation, indicating localised strengthening. Experimental results showed that the inclusion and increased volume fraction of the HAZ enhanced cyclic hardening without significantly reducing energy dissipation. As <em>β</em> increased from 0 to 1, the contribution of kinematic hardening rose from 63.96 % to 78.49 %, indicating back stress as the dominant strengthening mechanism at high <em>β</em>. Based on the Chaboche hardening framework, isotropic and kinematic parameters were decoupled, and HAZ properties were inversely identified. A layered elastoplastic modelling strategy incorporating the HAZ was proposed and validated via finite element (FE) simulations. Parametric analysis showed that when λ ≤ 1/15, the HAZ strengthening effect saturates, enabling the material to be simplified as a two-phase composite. This study clarifies the strengthening role of the HAZ in LC-produced bimetallic steels and offers a reliable constitutive modelling strategy for accurate prediction of cyclic performance in structural applications.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 113997"},"PeriodicalIF":6.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145159262","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":"On static and dynamic responses of smart magnetostrictive functionally graded plate: Modified Fourier series and differential quadrature solution","authors":"Wasim Patel ,&nbsp;Mukund A. Patil ,&nbsp;Arvind Bodhe ,&nbsp;Suvarna Saraf ,&nbsp;Ravikiran Kadoli","doi":"10.1016/j.tws.2025.113916","DOIUrl":"10.1016/j.tws.2025.113916","url":null,"abstract":"<div><div>This article presents an analysis of the free and forced vibration behavior of a functionally graded plate integrated with Terfenol-D based on the first-order shear deformation theory. This study extends Pradhan’s research by using a modified Fourier series solution to tackle vibration control under various boundary conditions. The outcomes of free vibration under various boundary conditions using a meshless differential quadrature approach has been verified. A closed-loop control system using feedback gains for displacement and velocity is used to actively regulate the static and dynamic responses of smart small-scale structures. This approach considers the impact of structural damping. The analysis of the mode shapes under simply supported boundary conditions, both before and after the influence of damping, is detailed. The impacts of critical factors, including geometry, boundary conditions, dynamic load, and bias magnetic field, are examined using numerical examples.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 113916"},"PeriodicalIF":6.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145159261","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":"Improving the fire resistance of light steel floor–ceiling systems through enhanced materials and construction methods","authors":"Sivaram Sivapalan,&nbsp;Mahen Mahendran,&nbsp;Anthony Deloge Ariyanayagam","doi":"10.1016/j.tws.2025.114007","DOIUrl":"10.1016/j.tws.2025.114007","url":null,"abstract":"<div><div>Light gauge steel framed (LSF) floor–ceiling systems, composed of cold-formed steel (CFS) joists and plasterboard ceilings, are increasingly used in modern construction for their strength-to-weight efficiency and cost benefits. However, conventional two-layer plasterboard ceiling systems typically provide only about 90 min of fire resistance level (FRL), limiting their applications when higher fire-ratings are required. This study presents four short-span, load-bearing fire tests on LSF floor–ceiling systems, including three innovative configurations: external rigid stone wool insulation (C1), a single 37 mm autoclaved aerated concrete (AAC) panel (C2), and semi-rigid cavity insulation supported by furring channels (C3) and a conventional three-layer plasterboard ceiling system (C4) commonly used to enhance the FRL. All three new systems achieved FRLs exceeding 130 min, representing more than a 40% improvement over typical two-layer plasterboard systems. Among them, the AAC panel (C2) reached the highest FRL of 158 min, followed by C3 (145 min) and C1 (138 min). The findings confirm that the proposed floor systems, incorporating alternative ceiling configurations or high-performance insulation materials, can substantially enhance the fire resistance of LSF floor systems. The proposed solutions also offer practical advantages in terms of constructability and acoustic performance, making them suitable for adoption in diverse building applications.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114007"},"PeriodicalIF":6.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267426","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":"Damage evolution of shear pre-deformation 3D woven composites under shear load based on multi-information experimental characterization","authors":"Tiantian Yang,&nbsp;Li Zhang,&nbsp;Tongtong Wang,&nbsp;Yan Wang,&nbsp;Tao Zheng,&nbsp;Zhixing Li,&nbsp;Licheng Guo","doi":"10.1016/j.tws.2025.114005","DOIUrl":"10.1016/j.tws.2025.114005","url":null,"abstract":"<div><div>The fabrication of three-dimensional woven composites (3DWCs) for engineering applications involves controlled pre-deformation and curing, which complicates mechanical performance analysis due to altered internal yarn angles. However, the current research fails to reveal how pre-deformation shear angle variations govern mechanical response and failure evolution under in-plane shear loading. Hence, this study systematically investigates in-plane shear behavior across pre-deformation angles, placement orientation, and loading directions. The deformation and progressive damage mechanisms are then elucidated by employing multi-information experimental characterization, where acoustic emission (AE) and digital image correlation (DIC) tracks damage initiation and evolution during shear loading, while micro-computed tomography (Micro-CT) provides 3D damage visualization and quantification for mechanistic interpretation. The results demonstrate that shear pre-deformation angles produce distinct in-plane shear responses under varying loading directions. For specimens placed along the warp direction, counterclockwise (CCW) loading reduces the warp-weft yarn angle toward 0°, promoting tight interlocking of binder yarns that direct load transfer to fibers, yielding fiber breakage failure. Conversely, clockwise (CW) loading increases the angle toward 90°, relaxing yarn architecture and concentrating local stresses in the matrix, triggering matrix-dominated crack propagation that significantly degrades shear performance. Nevertheless, specimens placed along the weft direction exhibit inversed behavior, where CCW loading induces matrix-dominated damage through yarn relaxation, while CW loading enhances fiber-bundle interlocking to produce fiber breakage failure. This study provides mechanistic insights into shear damage evolution of pre-deformation 3DWCs, which provides theoretical and practical guidance for future 3DWCs design.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114005"},"PeriodicalIF":6.6,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119376","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":"Effect of post-processing on the IWP structures of laser powder bed fusion fabricated CuCrZr alloys with different cell sizes","authors":"Yuan Gao ,&nbsp;Bin Liu ,&nbsp;Zhibo Ma ,&nbsp;Zhonghua Li ,&nbsp;Zezhou Kuai ,&nbsp;Yaoxian Zhang ,&nbsp;Bing Han ,&nbsp;Peikang Bai","doi":"10.1016/j.tws.2025.113992","DOIUrl":"10.1016/j.tws.2025.113992","url":null,"abstract":"<div><div>Porous structures are extensively utilized in lightweight manufacturing fields such as electronics and aerospace for heat dissipation. Due to the high thermal conductivity of copper alloys, powder adhesion during the laser powder bed fusion (L-PBF) process is a significant issue. Addressing the adhesion of unmelted powder on formed samples is crucial for ensuring the quality of porous structures. This study investigates the precise fabrication of CuCrZr alloy porous structures using L-PBF technology, and designs porous structures with a 20% volume fraction and varying cell sizes. To improve the quality of samples fabricated by L-PBF, plasma polishing was applied to the formed samples. Through subsequent heat treatment of the plasma-polished porous samples, mechanical properties and microstructures were analyzed. The experimental results show that plasma polishing reduces surface roughness by over 70%, significantly improving forming quality. The compressive strength reached a maximum of 332 MPa after heat treatment with a cell size of 2 mm, an increase of 79% compared to post-plasma polishing. Microstructure observations revealed that Cr precipitated after aging treatment, causing precipitation strengthening, which is a key factor in the improvement of mechanical properties. This research provides a theoretical basis for the post-processing of CuCrZr porous structures based on L-PBF technology.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 113992"},"PeriodicalIF":6.6,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119373","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":"Thermal fracture analysis of functionally graded piezoelectric materials containing interfacial cracks","authors":"Shuai Zhu ,&nbsp;Hongjun Yu ,&nbsp;Zhiyong Wang ,&nbsp;Zhihua Wang","doi":"10.1016/j.tws.2025.114003","DOIUrl":"10.1016/j.tws.2025.114003","url":null,"abstract":"<div><div>Interface thermal fracture behavior is an important issue affecting the reliable application of laminated piezoelectric devices. Based on the piezoelectric J-integral theory, this paper establishes a newly developed interaction integral (I-integral) technology suitable for dealing with the interfacial cracking problem of the inhomogeneous piezoelectric bi-materials under the thermal environment. In contrast to the previous I-integral, which is only applicable to homogeneous piezoelectric bi-materials, we rigorously derive and establish for the first time the thermal domain-independent I-integral (TDII-integral) for interfacial cracks in inhomogeneous piezoelectrics by designing a proper form of auxiliary fields and proving the region-independence for different integration areas, which is also known as the TDII-integral. Combined with the pre-processing numerical method, TDII-integral can achieve the precise extraction of thermal intensity factors (IFs) such as thermal stress IFs (TSIFs) and thermal electric displacement IF (TEDIF) at the interfacial crack tip. The piezoelectric bi-material interfacial fracture problem is modelled and the thermal IFs (TIFs) calculated in this paper are in good agreement with the literature results verifying the correctness of the TDII-integral. In addition, the effects of crack length and inclined angle on the TIFs of interfacial cracks in typical piezoelectric composite structures under thermal load are systematically investigated. The good agreement of the TIFs extracted with different integration regions for nonhomogeneous piezoelectric bi-materials under thermal loading numerically confirms the region-independence of the TDII-integral. The failure risk of interface fracture can be reduced by changing the elastic substrate material category and adjusting the substrate properties. The TDII- integral and numerical method proposed in this study will help to gain a deeper insight to the interface failure of piezoelectric structures under thermal loading and facilitate the interfacial engineering design and performance evaluation for piezoelectric composites.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114003"},"PeriodicalIF":6.6,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119375","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}