Thin-Walled Structures最新文献

{"title":"Seismic performance of a tall RC chimney structure with an emphasis on vertical seismic behavior using shaking table test","authors":"Yue Zhuo ,&nbsp;Hao Wu ,&nbsp;Ying Zhou ,&nbsp;Xilin Lu","doi":"10.1016/j.tws.2026.114676","DOIUrl":"10.1016/j.tws.2026.114676","url":null,"abstract":"<div><div>The effects of vertical seismic forces on high-rise structures like chimneys should not be underestimated. The simplified procedures for vertical seismic force in the Chinese chimney design code show notable discrepancies from observations and case analyses, particularly regarding the distribution and amplification trends of peak vertical seismic forces, which may lead to design inaccuracies. With the aim of studying the dynamic response characteristics of tall reinforced concrete chimneys under vertical seismic excitation, experimental research was conducted on a 1/30 scaled model of a typical 210 m tall single-flue reinforced concrete chimney by shaking table test. Such chimneys are thin-shell structures with no floors and have the characteristic of being slender and tall, with a simple and widely representative structural form. The results show that the chimney structure meets the seismic design target under earthquakes with an intensity of 7 (PGA 0.1 g) based on Chinese code and did not collapse under the earthquake input of intensity 9 (PGA 0.62 g). Two instances of damage were observed in the model during the tests: one caused primarily by horizontal ground motion, located near 4/5 of the structure's height, and the other due to the combined effect of both horizontal and vertical ground motion, located near 2/3 of the structure's height. The vertical seismic acceleration response increases significantly in the upper part of the model, with the maximum vertical acceleration amplification factor reaching over 10. Additionally, the contribution of vertical seismic stress increases with height. As the peak ground acceleration input increases, alternating tensile and compressive stresses are observed around the 2/3 height of the chimney, with this region gradually enlarging and propagating downward. This indicates a vulnerable zone in the chimney structure. Moreover, it is found that the vertical seismic force response of the chimney deviates significantly from the impulse method as provided in the Chinese “Code for design of chimneys” (GB50051-2013), which warrants further attention.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"224 ","pages":"Article 114676"},"PeriodicalIF":6.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147386835","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":"Bionic design strategies and recent advances in lattice metamaterials: a comprehensive review","authors":"Zhixuan Sun ,&nbsp;Yu Gong ,&nbsp;Hao Liu ,&nbsp;Jianyu Zhang ,&nbsp;Libin Zhao ,&nbsp;Ning Hu ,&nbsp;Chuanzeng Zhang","doi":"10.1016/j.tws.2026.114654","DOIUrl":"10.1016/j.tws.2026.114654","url":null,"abstract":"<div><div>As a representative class of mechanical metamaterials, lattice structures have emerged as a frontier research focus due to their tailorable unit cell topologies and exceptional mechanical properties. In recent years, bio-inspired design approaches, informed by the multiscale structural features of biological systems, have provided innovative pathways for optimizing performance and enabling functional innovations in lattice structures. Leveraging the unique capabilities of additive manufacturing, bio-inspired lattice structures demonstrate significant potential in lightweight design, energy absorption, and mechanical property modulation. This review systematically summarizes recent advances in bio-inspired lattice structures and establishes a multidimensional classification framework based on bio-inspired design methodologies. First, design strategies are categorized into two hierarchical levels: unit cell-scale bio-inspired designs and macroscopic lattice architectures. Second, a taxonomy rooted in biological prototypes is proposed, encompassing plant-dominated, animal-dominated, and multi-source bio-inspired fusion designs, accompanied by systematic comparative analyses. Furthermore, advanced fabrication techniques for lattice structures are comprehensively discussed, and scientifically grounded perspectives on future development directions are presented. This work provides theoretical guidance and technical references for the design and high-performance development of novel bio-inspired lattice structures.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"224 ","pages":"Article 114654"},"PeriodicalIF":6.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147386977","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":"Aero-thermo-elastic behaviour of variable stiffness composite laminates and sandwich panels with temperature-dependent material properties","authors":"J.A. Moreira ,&nbsp;F. Moleiro ,&nbsp;A.L. Araújo ,&nbsp;A. Pagani","doi":"10.1016/j.tws.2026.114738","DOIUrl":"10.1016/j.tws.2026.114738","url":null,"abstract":"<div><div>This work is focused on the evaluation of the impact of temperature-dependent material properties on the linear aero-thermo-elastic flutter and buckling stability of variable stiffness composite laminates and sandwich panels with curvilinear fibres under supersonic airflow and thermal loads. To ensure a proper structural modelling, an assessment of Equivalent Single Layer and Layerwise models is also provided, involving the First- and Third-order Shear Deformation Theories as well as further refined theories based on high-order Lagrange <span><math><mi>z</mi></math></span>-expansions with thickness stretching. Numerical applications are centred on graphite-epoxy composite laminates and PVC foam core sandwich panels, with either unidirectional or curvilinear fibres, considering simply supported and clamped boundary conditions. It is concluded that temperature-dependent material properties can substantially decrease both critical buckling temperatures and flutter boundaries, depending on the fibre orientations, thermal expansion coefficients and boundary conditions. In particular, the temperature-dependency of the core material plays a major role on the aero-thermo-elastic stability of sandwich panels. Ultimately, the models accuracy assessment reveals that high-order theories are necessary to attain highly accurate flutter estimations for temperatures close to the critical buckling temperature, especially when considering curvilinear fibres and temperature-dependent material properties.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"224 ","pages":"Article 114738"},"PeriodicalIF":6.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147386980","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":"Investigation on shear behavior of longitudinal-plate shear connector in concrete-filled steel tube","authors":"Yaojun Zhang ,&nbsp;Dan Gan ,&nbsp;Jian Jiao ,&nbsp;Zhuocheng Tang ,&nbsp;Yifeng Liu","doi":"10.1016/j.tws.2026.114672","DOIUrl":"10.1016/j.tws.2026.114672","url":null,"abstract":"<div><div>In concrete-filled steel tubular (CFST) structures, the natural bond strength is often insufficient to transfer forces between the steel hollow section and the infilled concrete. This study proposed a novel longitudinal-plate shear connector to enhance the interface shear resistance of CFST columns. A total of eight CFST specimens with longitudinal-plate shear connectors and a benchmark specimen were designed and subjected to push-out tests. The test variables included the number of shear connectors, shear connector details (e.g., thickness, width, the existence of openings in the shear connector, and the hole diameter of the openings), and boundary conditions of the longitudinal-plate shear connectors. The experimental results demonstrated that longitudinal-plate shear connectors increased shear capacity by up to 725 % compared to the benchmark specimen. Based on the test results, a verified finite element model was developed on the basis of the dynamic implicit solver to conduct a detailed parametric study. Finally, the failure modes of the longitudinal-plate shear connector were analyzed in detail, and corresponding formulas for predicting the shear capacity of longitudinal-plate shear connection were proposed.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"224 ","pages":"Article 114672"},"PeriodicalIF":6.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147386984","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":"Rigidity paradox of kirigami arches","authors":"Eszter Fehér","doi":"10.1016/j.tws.2026.114691","DOIUrl":"10.1016/j.tws.2026.114691","url":null,"abstract":"<div><div>The geometry of bending-active kirigami arches, decorated by cuts and holes, is strongly influenced by the location and geometry of the perforations. This study demonstrates that, in some instances, the geometric strengthening induced by additional cuts can outweigh the weakening effect of material removal, leading to a counterintuitive increase in structural rigidity under a given concentrated load. We present multiple parametric cut patterns to show that rigidity can be increased both under symmetric and asymmetric loads. While the preferred cut location is often near the point of action of the load, asymmetric loading can shift this optimum elsewhere. Moreover, the distance between the supports also plays a crucial role, namely, the rigidity gain vanishes when the supports are too far apart. We found that the rigidity can be increased for both non-perforated and perforated sheets, and there is a non-monotonic relationship between the global porosity and the rigidity of the structure. Numerical predictions are validated against experimental measurements.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"224 ","pages":"Article 114691"},"PeriodicalIF":6.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387174","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":"Tensile behavior of corroded high-strength steel components after fire under air and foam cooling","authors":"Chunlei Xu ,&nbsp;Wenyu Cai ,&nbsp;Guo-Qiang Li","doi":"10.1016/j.tws.2026.114670","DOIUrl":"10.1016/j.tws.2026.114670","url":null,"abstract":"<div><div>In engineering practice, many steel structures in service are inevitably corroded, making them more susceptible to severe damage after exposure to fire. Therefore, assessing the post-fire tensile properties of corroded structural steel is crucial. This study conducted tensile tests on Q690 high-strength structural steel components, subjected to varying levels of corrosion, heating temperatures, and cooling methods (air cooling and foam fire extinguishing agent cooling), to examine their stress-strain behavior, reduction coefficient of mechanical properties, failure modes, and surface strain fields under these combined factors. A predictive model incorporating the combined effects of corrosion, exposure temperature, and cooling method was developed to describe the post-fire mechanical properties of the corroded Q690 steel. In addition, a 3D scanner was used to analyze the damaged surface morphology of the tensile components. The obtained corrosion morphology was then imported into the finite element model for numerical analysis using three-dimensional reverse reconstruction technology. According to this study, below 500 °C, corrosion was the main factor influencing the strength. Above 500 °C, temperature became the dominant factor, with strength decreasing rapidly as temperature increased. When the exposure temperature exceeded 700 °C, the influence of cooling methods on the mechanical properties of steel became pronounced. High temperatures also caused the corrosion-induced pits to expand. The damage depth generally followed a normal distribution, and as the pit depth increased, stress triaxiality increased while fracture equivalent plastic strain decreased.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"224 ","pages":"Article 114670"},"PeriodicalIF":6.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387175","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":"Magnetoelastic free vibration of a microplate on an elastic foundation","authors":"Xin Li ,&nbsp;Mengxue Xie ,&nbsp;Jianbo Feng ,&nbsp;Yuda Hu","doi":"10.1016/j.tws.2026.114652","DOIUrl":"10.1016/j.tws.2026.114652","url":null,"abstract":"<div><div>While previous studies on magnetoelastic plates have provided foundational insights, the combined roles of magnetic saturation and a two-parameter elastic foundation within a consistent size-dependent framework remain less explored, limiting the prediction accuracy for nonlinear stiffness characteristics. This study investigates the magnetoelastic coupled nonlinear vibration of a four-edge simply supported ferromagnetic microplate resting on an elastic foundation under a transverse magnetic field. A magnetization force model is developed by incorporating the nonlinear magnetization behavior and magnetic saturation effects of the ferromagnetic material. Based on the modified strain gradient theory (MGST) and Kirchhoff plate theory, with due consideration of geometric nonlinearity, the kinetic and strain energies of the microplate accounting for size effects are formulated. The additional deformation energy induced by the Winkler–Pasternak elastic foundation is also derived. The nonlinear magneto-elastic coupling vibration equations are established via Hamilton’s variational principle. Using the Galerkin method combined with the method of multiple scales, the second-order analytical expressions for the nonlinear natural frequencies of the coupled system are obtained. Numerical case studies are conducted to examine the variations of microplate deflection and natural frequency under the combined effects of the magnetic field and elastic foundation. The results indicate that the deflection increases with magnetic field intensity but decreases with foundation stiffness parameters. More importantly, the coupled effects of the microplate, magnetic field, and elastic foundation lead to distinct softening-hardening spring transitions, a complex nonlinear behavior originating from the interplay between magnetic saturation and the Pasternak foundation's shear layer.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"224 ","pages":"Article 114652"},"PeriodicalIF":6.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387270","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":"Ballistic performance and protection mechanism of PDA-CNT modified UHMWPE composite","authors":"Peng Liu ,&nbsp;Xinyu Yao ,&nbsp;Chaohe Ma ,&nbsp;Hongyuan Zhou ,&nbsp;Hong Zhang","doi":"10.1016/j.tws.2026.114737","DOIUrl":"10.1016/j.tws.2026.114737","url":null,"abstract":"<div><div>During ballistic impact, the low surface energy of Ultra-high-molecular-weight polyethylene (UHMWPE) often results in severe interlaminar crack expansion. This study develops a polydopamine-carbon nanotube (PDA-CNT) modified UHMWPE composite. Tensile and peeling experiments show that a 0.01% concentration of CNT has the best modifying effect: the tensile modulus and strength increase by 37%, and the interlayer peeling force increase by 85%. Double Cantilever Beam (DCB) test shows that the mode Ⅰ fracture toughness increases by 117.2%, from 0.87 kJ/mm² to 1.89 kJ/mm². Ballistic experiments show a slight increase in the ballistic limit and a significant reduction in crack extension (from 67.2 mm to 47.8 mm). Finite element analysis (FEA) reveals that the modified laminate exhibits fewer failed cohesive elements and a 34.2% reduction in the delamination area. Compared to the pure target, modification dissipates the projectile’s energy through less kinetic energy but more delamination damage energy. In the secondary impact, the modification reduces the back-face deformation (BFD) from 14.5 mm to 7.8 mm, achieving a 46% reduction. Modification mitigates the superposition effect of multiple impacts on damage and the probability of subsequent projectile impacts on delaminated areas. This modification method could be applied to the protective equipment demanding repeated impact resistance.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"224 ","pages":"Article 114737"},"PeriodicalIF":6.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147386438","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":"Local plastic deformation prediction of spherical and cylindrical pressure hulls subject to underwater shock loading","authors":"Fu-Jin Yang ,&nbsp;Zhao-Li Tian ,&nbsp;Jun Guo ,&nbsp;Fei Zhao","doi":"10.1016/j.tws.2026.114674","DOIUrl":"10.1016/j.tws.2026.114674","url":null,"abstract":"<div><div>Pressure hulls of underwater vehicles, typically configured as spherical or cylindrical structures, are vulnerable to localized damage when subjected to shock loads from underwater explosions. This study establishes theoretical models for deformation patterns and deformation center deflection of such hulls under underwater shock by integrating fluid–structure interaction theory, localized deformation mechanics, and structural dynamics. Systematic investigations are conducted to evaluate the influence of hull thickness <span><math><mi>h</mi></math></span>, diameter <span><math><mi>D</mi></math></span>, length <span><math><mi>L</mi></math></span>, shock factor <span><math><mi>I</mi></math></span>, and hydrostatic pressure <span><math><msub><mrow><mi>p</mi></mrow><mrow><mi>∞</mi></mrow></msub></math></span>. The deformation center deflection <span><math><msub><mrow><mi>w</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span> is found to scale as <span><math><mrow><msub><mrow><mi>w</mi></mrow><mrow><mn>0</mn></mrow></msub><mo>∝</mo><msup><mrow><mi>h</mi></mrow><mrow><mo>−</mo><mn>2</mn></mrow></msup></mrow></math></span> with thickness, <span><math><mrow><msub><mrow><mi>w</mi></mrow><mrow><mn>0</mn></mrow></msub><mo>∝</mo><msqrt><mrow><mi>D</mi></mrow></msqrt></mrow></math></span> with diameter, <span><math><mrow><msub><mrow><mi>w</mi></mrow><mrow><mn>0</mn></mrow></msub><mo>∝</mo><msup><mrow><mi>L</mi></mrow><mrow><mo>−</mo><mn>0</mn><mo>.</mo><mn>5</mn></mrow></msup></mrow></math></span> with length, <span><math><mrow><msub><mrow><mi>w</mi></mrow><mrow><mn>0</mn></mrow></msub><mo>/</mo><mi>D</mi><mo>∝</mo><msup><mrow><mi>I</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></math></span> with shock factor, and <span><math><mrow><msub><mrow><mi>w</mi></mrow><mrow><mn>0</mn></mrow></msub><mo>/</mo><mi>D</mi><mo>∝</mo><msub><mrow><mi>p</mi></mrow><mrow><mi>∞</mi></mrow></msub></mrow></math></span> with hydrostatic pressure. Results show that spherical hulls of equal diameter exhibit superior shock resistance, and hull thickness plays a particularly significant role in mitigating shock effects. The proposed deformation patterns and deflection metrics provide a practical basis for evaluating shock resistance and assessing pressure-bearing capacity and implosion risks in damaged underwater hulls.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"224 ","pages":"Article 114674"},"PeriodicalIF":6.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147386450","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":"Investigation on entrance and exit delamination damage in drilling CF/PEEK via experimental and machine learning approaches","authors":"Zhijian Meng ,&nbsp;Shunuan Liu ,&nbsp;Yuchen Cai ,&nbsp;Qi Yang ,&nbsp;Bin Luo ,&nbsp;Kaifu Zhang","doi":"10.1016/j.tws.2026.114663","DOIUrl":"10.1016/j.tws.2026.114663","url":null,"abstract":"<div><div>As a thermoplastic composite with superior sustainability and mechanical performance, carbon fiber reinforced polyetheretherketone (CF/PEEK) has become the preferred material for fabricating prototype components in next-generation aircraft applications. However, drilling-induced delamination damage is prone to occur due to the material’s anisotropy and lamination characteristics, severely compromising the service reliability of CF/PEEK components. This study focuses on the entrance and exit delamination damage in drilling CF/PEEK. Specifically, drilling experiments under various parameters are conducted to examine the distribution characteristics and formation mechanisms of delamination. Subsequently, considering thrust force, torque, and drilling temperature, a small-sample sensitivity analysis framework based on a hyperparameter-optimized support vector regression (SVR) model and the Sobol method is developed to identify sensitivity factors influencing delamination. The results indicate that delamination primarily occurs within the fiber cutting angle range of 90°-180°, where fiber bending fractures lead to an increase in subsurface damage. The hole entrance primarily exhibits mode Ⅲ delamination caused by intralaminar tearing, whereas the hole exit primarily exhibits mode III delamination, accompanied by mode I delamination due to interlaminar debonding. Furthermore, torque is identified as the most sensitive factor influencing both entrance and exit delamination. Compared to entrance delamination, the exit delamination is more susceptible to interactions among multiple factors.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"224 ","pages":"Article 114663"},"PeriodicalIF":6.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387173","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}