Thin-Walled Structures最新文献

{"title":"Synergistic design of curved beam metastructures with tunable stiffness, Poisson's ratio and energy absorption ability","authors":"Gai-Qin Liu,&nbsp;Hai-Tao Liu","doi":"10.1016/j.tws.2025.113938","DOIUrl":"10.1016/j.tws.2025.113938","url":null,"abstract":"<div><div>Mechanical metastructures have garnered widespread attention due to their superior mechanical properties. However, how mechanical metastructures achieve bidirectional mechanical responses while enabling synergistic multi-performance design remains an issue worthy of in-depth investigation. In this study, four types of curved beam metastructures (CBMs) are proposed, named CBM-I, CBM-II, CBM-III, and CBM-IV. The mechanical responses of these CBMs, including stress-strain curves, energy absorption capabilities, and deformation profiles, are studied through finite element simulations and experiments. The results show that both CBM-I and CBM-II exhibit negative stiffness characteristics along the X and Y directions, while offering customizable deformation lengths. When compressed to a densification state, the stress-strain curves of CBM-I and CBM-II demonstrate a three-stage plateau feature. CBM-III not only achieves the transformation of nonlinear properties such as positive stiffness, quasi-zero stiffness, and negative stiffness but also features a tunable Poisson’s ratio, which cannot be accomplished by conventional negative-stiffness metastructures. CBM-IV exhibits excellent capability of sign switching for Poisson's ratio. The frame-reinforced design and double curved beam design strategies not only improve the peak force of CBMs but also suppress the asymmetric buckling deformation of the curved beam and enhance structural stability. The quasi-zero stiffness and customizable length characteristics of CBM-I and CBM-II give them significant application value in morphing wings. This study provides valuable insights for the multifunctional design of novel tunable CBMs and promotes their application in aerospace engineering.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 113938"},"PeriodicalIF":6.6,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145020722","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":"Formation of twisted hierarchical patterns through sequential film depositions and wrinkles","authors":"Senjiang Yu ,&nbsp;Boyuan Huang ,&nbsp;Dongyu Yang ,&nbsp;Qiaofan Wang ,&nbsp;Zhixiang Chen ,&nbsp;Lingwei Li ,&nbsp;Yong Ni","doi":"10.1016/j.tws.2025.113926","DOIUrl":"10.1016/j.tws.2025.113926","url":null,"abstract":"<div><div>Wrinkle patterns arising from surface instabilities are widespread in natural and engineered systems, with broad potential in electronics, optics, bionics and surface engineering. Although various methods—such as thermal expansion, swelling, mechanical loading, and light irradiation—have been developed to create diverse morphologies, generating complex hierarchical wrinkles with controllable features remains a challenge. Here, we report tunable hierarchical wrinkle patterns in film-substrate systems via multistep film deposition and sequential release of nonorthogonal biaxial prestretch. The first deposition and strain release yield unidirectional stripe wrinkles, while a second deposition followed by strain release along a nonorthogonal direction induces twisted hierarchical morphologies through the interaction of two wrinkle generations. The pattern formation process, morphology, and underlying mechanics are elucidated through experiments, theoretical analysis, and finite element simulations. This study elucidates the role of multistep deposition and sequential prestretch release in symmetry-breaking wrinkle formation and offers a simple yet versatile strategy for engineering ordered hierarchical wrinkles for practical applications.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 113926"},"PeriodicalIF":6.6,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050346","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 and failure mechanism of heterogeneous cladding tube under internal pressure: Experimental study and numerical modeling","authors":"Chong Wei ,&nbsp;Shuang Liang ,&nbsp;Songbin Zhang","doi":"10.1016/j.tws.2025.113932","DOIUrl":"10.1016/j.tws.2025.113932","url":null,"abstract":"<div><div>Refractory metal-SiC_f/SiC heterogeneous composites provide a promising approach to ensuring the hermeticity of nuclear-grade SiC_f/SiC composites. However, their underlying failure mechanisms affecting their performance remain unclear. In this study, we used a combination of expansion plug testing and finite element modeling to systematically investigate the damage evolution process and failure mechanisms of Mo-SiC_f/SiC heterogeneous cladding. The established theoretical model effectively predicts the damage failure process and mechanical properties of heterogeneous composite cladding, showing good agreement with experimental results. Results indicate that the heterogeneous cladding exhibits a three-stage damage evolution characteristic: initial elastic deformation transitions into nonlinear behavior via matrix cracking, subsequent Mo layer fracturing activates unstable crack propagation, and structural failure ultimately manifests as localized damage in the SiC_f/SiC layer with preserved overall structural integrity. The gradient damage evolution reveals the synergistic effect of the heterogeneous cladding system, where the Mo layer not only bears hoop stress but also ensures the hermeticity, while the SiC_f/SiC layer provides structural support, effectively delaying catastrophic failure. This study offers key theoretical guidance for the design of accident-tolerant fuel cladding and provides essential insights for enhancing its mechanical performance.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 113932"},"PeriodicalIF":6.6,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145049830","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":"Multiphysics analysis and optimization of solid oxide electrolysis cells with functionally graded fuel electrodes","authors":"Fangzheng Liu ,&nbsp;Zhiqi Zhao ,&nbsp;Liusheng Xiao ,&nbsp;Ruidong Zhou ,&nbsp;Qi Liu ,&nbsp;Ding Rong Ou ,&nbsp;Jinliang Yuan","doi":"10.1016/j.tws.2025.113936","DOIUrl":"10.1016/j.tws.2025.113936","url":null,"abstract":"<div><div>This study presents a multiphysics CFD model to understand and analyze hydrogen production and thermal stress in anode-supported planar solid oxide electrolysis cells (SOECs), which employ functionally graded fuel electrodes with engineered linear gradients in porosity, pore size, and Ni composition along the electrode thickness direction. Moreover, orthogonal experimental design method is also developed and applied to identify the optimal parameter ranges, and the graded porosity is found to be the dominant factor enhancing hydrogen production, while the graded Ni composition is the primary parameter governing the maximum thermal stress. Synergistic optimization of porosity and Ni composition gradients achieves a 24.9% increase in the hydrogen production with a 10.0% reduction in the maximum thermal stress, demonstrating their critical role in concurrently boosting SOEC performance and mechanical durability.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 113936"},"PeriodicalIF":6.6,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145049781","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":"Mechanical performance of Q690 high-strength steel bolted joints connecting H-section steel members to hollow spheres under bending and shear for suspend-dome structures","authors":"Ailin Zhang,&nbsp;Bowen Jin,&nbsp;Xuechun Liu,&nbsp;Xuesen Chen","doi":"10.1016/j.tws.2025.113927","DOIUrl":"10.1016/j.tws.2025.113927","url":null,"abstract":"<div><div>Conventional suspend-dome structures typically employ upper latticed shells with extensive on-site welded components and joints, while the application of H-section steel members remains limited. This approach results in prolonged construction periods, inconsistent weld quality, and significant environmental pollution. To address these issues, a large-span fully assembled high-performance suspend-dome structure with H-section steel members was proposed, along with bolted joints connecting the H-section steel members to hollow spheres. Tests under combined bending and shear loading were conducted to investigate the out-of-plane flexural performance of the proposed joints. The failure modes, load transfer mechanisms, moment-rotation curves, key performance indicators, and patterns of bolt preload and strain variation were obtained. The influence of the geometric parameters of joint components was studied through finite element analysis. The joint design recommendations were proposed. Furthermore, theoretical formulations for the initial flexural stiffness and flexural capacities were proposed, and the accuracy was validated through comparison with test and finite element analysis results.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 113927"},"PeriodicalIF":6.6,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097482","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":"Nonlinear stability and vibration analysis of fluid-conveying nanochannel scroll shells using an adaptive neuro-fuzzy inference system","authors":"Mostafa Siavashi,&nbsp;Morteza Dardel,&nbsp;Mohammad Hadi Pashaei","doi":"10.1016/j.tws.2025.113931","DOIUrl":"10.1016/j.tws.2025.113931","url":null,"abstract":"<div><div>This study comprehensively investigates the vibrational characteristics and nonlinear stability of nanoscale scroll channel shells during fluid conveyance. By employing the First Shear Deformation Theory (FSDT) in conjunction with the Modified Couple Stress Theory (MCST), a detailed mathematical model is developed to accurately characterize the behavior of the nano scroll channel shell. Nonlinear equations incorporating von Kármán strains are derived to refine the precision of the stability analysis. Additionally, the influence of van der Waals forces, which are fundamental at the nanoscale, is systematically examined. The research investigates the interactions between fluid-induced forces, geometric nonlinearities, and nanoscale phenomena through rigorous computational modeling and numerical simulations. A nonlinear modeling database is established to facilitate in-depth analysis, integrating the geometric parameters and physical properties of nanochannels to support interpolation and extrapolation of key variables. Furthermore, machine learning frameworks, including Multilayer Perceptron Networks (MLP) and an Adaptive-Network-Based Fuzzy Inference System (ANFIS), are employed to predict natural frequencies with high accuracy, significantly enhancing predictive capabilities. This framework identifies various instability scenarios in nano scroll shell channels, including fluctuations in natural frequencies, fluid-induced instabilities, and bifurcation phenomena under diverse operational conditions. The findings contribute to a deeper understanding of the dynamic behavior and stability thresholds of nanoscale scroll shells in fluid environments, providing valuable insights for optimizing fluid transport systems and advancing research into nanoscale engineering applications.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 113931"},"PeriodicalIF":6.6,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097055","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":"A novel nonlinear stability modeling of mechanical-electro-carrier coupling piezoelectric semiconductor cylindrical shells","authors":"Wei Wang ,&nbsp;Gaofei Guan ,&nbsp;Lide Chen ,&nbsp;Jiabin Sun ,&nbsp;Zhenhuan Zhou ,&nbsp;Xinsheng Xu","doi":"10.1016/j.tws.2025.113937","DOIUrl":"10.1016/j.tws.2025.113937","url":null,"abstract":"<div><div>Piezoelectric semiconductors (PS) shell-like structures have great potential for the manufacture of innovative devices, such as nano sensors. To evaluate stability of such devices, a novel mechanical-electro-carrier (MEC) coupling PS cylindrical shell (PSCS) post-buckling model is developed based on the high-order shear deformation shell theory (HSDT). By applying the Galerkin technique in conjunction with newly developed trial functions, the mode-jumping equilibrium path, post-buckling deformation, distributions of electron concentration and electric potential are determined. The effects of crucial influencing parameters, including geometrical parameters, semiconductors constants and voltages on nonlinear stability of PSCS, are explored. Numerical findings reveal that, as a consequence of the MEC coupling effect, both the bifurcation point (first buckling) and load-bearing capacity of PSCS are reduced compared to those of classical piezoelectric counterpart.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 113937"},"PeriodicalIF":6.6,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145020629","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":"Shape sensing and damage detection of composite pressure vessels using inverse finite element method coupled with physics-based strain pre-extrapolation","authors":"Jacopo Bardiani ,&nbsp;Roberto Faure Ragani ,&nbsp;Lucio Pinello ,&nbsp;Adnan Kefal ,&nbsp;Andrea Manes ,&nbsp;Claudio Sbarufatti","doi":"10.1016/j.tws.2025.113935","DOIUrl":"10.1016/j.tws.2025.113935","url":null,"abstract":"<div><div>This study presents an advanced strategy for shape sensing and damage detection of composite Type IV pressure vessels using the inverse finite element method (iFEM) coupled with a novel physics-based strain pre-extrapolation approach. The pre-extrapolation methodology, developed based on Kirchhoff plate bending theory, enhances the accuracy of full-field displacement and strain reconstruction by addressing the need for strain input across all structural regions. By incorporating discrete experimental measurements, this framework enables precise residual strain estimation, facilitating damage localization in composite structures. The proposed inverse model is validated through both numerical and experimental investigations, leveraging fiber optic sensor networks strategically placed along axial and circumferential segments of the pressure vessel. Quasi-static compression and low-velocity impact (LVI) tests are conducted to evaluate the model’s performance under complex loading conditions. The reconstructed displacement and strain fields demonstrate the exceptional capability of iFEM in accurately capturing structural deformations and detecting damage initiation and progression. Notably, the method effectively identifies damage induced by LVI by analyzing residual strain distributions at critical post-impact time instances. Overall, the results underscore the robustness of the iFEM framework in capturing complex shape deformations and damage patterns that might otherwise remain undetected, highlighting its potential for real-time structural health monitoring of composite pressure vessels.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 113935"},"PeriodicalIF":6.6,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145049780","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":"Research on shear buckling behaviour of friction stir welding 6061-T6 aluminium alloy H-section beams","authors":"Beibei Li ,&nbsp;Yanjun Tong ,&nbsp;Shuai Mo ,&nbsp;Jingfeng Wang ,&nbsp;Letian Hai ,&nbsp;Yuanqing Wang","doi":"10.1016/j.tws.2025.113922","DOIUrl":"10.1016/j.tws.2025.113922","url":null,"abstract":"<div><div>This study systematically investigated the shear buckling behaviour of the friction stir welding (FSW) 6061-T6 aluminium alloy H-section beams through experimental and numerical analysis methods. FSW is a solid-state joining process that exhibits superior retention of joint strength and markedly lower sensitivity to welding-induced defects in comparison to conventional fusion welding techniques. On the basis of experimental tests on six FSW 6061-T6 aluminium alloy H-section beams, the material properties, initial geometric imperfections, FSW-induced residual stresses, failure modes and load-deflection curves were reported. Finite element (FE) models were validated against experimental results to assess their predictive accuracy in failure modes and shear buckling resistances. A parametric analysis involving 708 FE models was subsequently conducted to expand the database. The results indicate that FE models incorporating FSW-induced strength reduction and residual stresses effectively enhanced the predictive accuracy and consistency of shear buckling resistances of specimens. The number/width of welds and residual stresses exhibited minimal influence on shear buckling performance, while the installation of rigid end posts could enhance the anchorage restraint on web tension field development, thereby improving the shear buckling capacity of beams. Initial geometric imperfections had a certain weakening effect on the ultimate bearing capacity of the beam, while the influence of their amplitude was limited. The experimental and FE results for FSW 6061-T6 aluminium alloy H-section beams were compared against current design requirements stipulated in Chinese, European, and American codes. The comparison results indicate that when the normalized width-to-thickness ratios of the web fell within the ranges of 0.5–1.0 and 0.6–1.2, the design resistance predictions of the Chinese and American codes were unsafe, and all predicted results were overall conservative by 24.0–34.5%, also with greater dispersion. Modifications were proposed based on Chinese and European codes, achieving a 6–18% improvement in prediction accuracy and reduced dispersion compared to current standards.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 113922"},"PeriodicalIF":6.6,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145159414","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":"A novel form-finding method for cable-net structures using variable-length cable elements based on absolute nodal coordinate formulation","authors":"Chengbin Peng,&nbsp;Hui Ren,&nbsp;Wei Fan,&nbsp;Jiashuo Mi","doi":"10.1016/j.tws.2025.113933","DOIUrl":"10.1016/j.tws.2025.113933","url":null,"abstract":"<div><div>Cable-net structures rely on the pretension of the cables to provide stiffness to bear external loads and ensure stability. The shape and internal forces exhibit mutual coupling, making form-finding very challenging. A novel form-finding method for cable-net structures is proposed in this work. The cable-net structure is modeled by variable-length and constant-length absolute nodal coordinate formulation (ANCF) cable elements connected by spherical joints and sliding joints. Cable lengths and node positions undergo adaptive adjustment through feedback control. The variable-length elements facilitate the cable length adjustment to ensure uniform tension distribution. The translation velocities of nodes regulate the boundary nodes’ positions to satisfy the preset boundary conditions. The key advantage of the present method is that it is insensitive to initial conditions and can be easily applied to other cable-net structures with more complex shapes. The validity and accuracy of the present form-finding method are demonstrated through several numerical examples.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 113933"},"PeriodicalIF":6.6,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145027462","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}