Thin-Walled Structures最新文献_第6页

Stability of prestressed stayed I-section steel columns: Zones-based and intelligent design considering local buckling 预应力工字截面钢柱的稳定性：考虑局部屈曲的区域智能设计

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-04-11 DOI: 10.1016/j.tws.2025.113269

Kaidong Wu , Xinyu Zhou , Cheng Huang , Zhe Xing , Ziheng Lu , Kuntao Quan

引用次数: 0

High stable auxetic metamaterials developed through feature-control topology optimization and additive manufacturing 通过特征控制拓扑优化和增材制造开发出高稳定性的增生性超材料

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-04-11 DOI: 10.1016/j.tws.2025.113305

Han Zhengtong , Zhou Yang , Xu Ze , Wei Kai , Zhao Jianhua , He Zhelong , He Gang

{"title":"High stable auxetic metamaterials developed through feature-control topology optimization and additive manufacturing","authors":"Han Zhengtong , Zhou Yang , Xu Ze , Wei Kai , Zhao Jianhua , He Zhelong , He Gang","doi":"10.1016/j.tws.2025.113305","DOIUrl":"10.1016/j.tws.2025.113305","url":null,"abstract":"<div><div>Auxetic metamaterials with stable deformation modes are essential in engineering applications to achieve desired functionalities, as otherwise they may incur irreversible damage, e.g., structural interference and collision damage. However, only a few works have proposed special architectures relying on inspiration and experience, meaning that their design and fabrication remain challenging due to the lack of a systematic method. Here, we propose a novel feature-control metamaterial topology optimization framework aimed at efficiently exploring auxetic metamaterials with high stability and manufacturability. By integrating the local volume fraction function and skeleton-based length scale function, the method effectively controls material distribution and minimum geometric size, preventing excessively slender features and unmanufacturable configurations. Specimens were fabricated using additive manufacturing, and experimental testing validated the mechanical properties, closely aligning with finite element analysis predictions. Results show that simply increasing the volume fraction in topology optimization to raise the relative density of auxetic metamaterials does not directly enhance stability. Instead, the novel designs effectively prevent instability by incorporating denser structures and localized internal ribs, which improve stiffness and overall load-bearing capacity, as confirmed by extensive simulations and experiments. This approach enhances the design efficiency of stable metamaterials and facilitates the development of advanced configurations, expanding the application of auxetic materials in protective engineering, aerospace, and civil engineering.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"213 ","pages":"Article 113305"},"PeriodicalIF":5.7,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843113","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}

引用次数: 0

Nonlinear dynamic analyses of a rotating ferromagnetic functionally graded cylindrical shell with initial geometric imperfections 具有初始几何缺陷的旋转铁磁功能梯度圆柱壳的非线性动力学分析

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-04-11 DOI: 10.1016/j.tws.2025.113264

Tao Yang , Yuda Hu

{"title":"Nonlinear dynamic analyses of a rotating ferromagnetic functionally graded cylindrical shell with initial geometric imperfections","authors":"Tao Yang , Yuda Hu","doi":"10.1016/j.tws.2025.113264","DOIUrl":"10.1016/j.tws.2025.113264","url":null,"abstract":"<div><div>In this paper, the magneto-thermoelastic dynamic response of a rotating ferromagnetic functionally graded (FG) cylindrical shell with initial geometric imperfections is investigated. Considering the temperature dependence and spatial graded characteristics of physical properties, a combination of power-law distribution and temperature-dependent function is employed to formulate the equivalent physical parameters mathematically. Using the physical neutral surface as a reference and based on Donnell's nonlinear shell theory, constitutive equations are established for the FG cylindrical shell with initial geometric imperfections. Meanwhile, considering the effect of rotation, which induces both the centrifugal force and initial circumferential tension, expressions for kinetic energy and initial strain energy are presented. According to the electromagnetic elasticity theory, the Lorentz force generated by the eddy current effect and the nonlinear magnetization force due to spin magnetic moments are deduced. Subsequently, the nonlinear governing equations are established and discretized based on Hamilton's principle and Galerkin's method. Analytical solutions for the steady-state response are derived utilizing the multi-scale method, and stability conditions of the resonance response are determined by the Lyapunov theory. Afterward, numerical results are leveraged to perform detailed parametric studies on the vibration response of different resonance forms. Of particular interest in this process is the influence of initial geometric imperfections and external physical fields on the resonance behavior. This study offers a rigorous solution and deepens the understanding of the dynamic behavior of rotating imperfect cylindrical shells in multi-physical fields.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"213 ","pages":"Article 113264"},"PeriodicalIF":5.7,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838573","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}

引用次数: 0

Ballistic response behaviour of Dyneema® HB210 curved armour plates: An experimental and numerical study Dyneema®HB210弯曲装甲板的弹道响应行为：实验和数值研究

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-04-11 DOI: 10.1016/j.tws.2025.113265

Daniel Eckhoff , Susanne Thomesen , Ulrich Heisserer , Tore Børvik

{"title":"Ballistic response behaviour of Dyneema® HB210 curved armour plates: An experimental and numerical study","authors":"Daniel Eckhoff , Susanne Thomesen , Ulrich Heisserer , Tore Børvik","doi":"10.1016/j.tws.2025.113265","DOIUrl":"10.1016/j.tws.2025.113265","url":null,"abstract":"<div><div>This study investigates the impact response behaviour of ultra-high-molecular-weight polyethylene (UHMWPE) composites, specifically Dyneema® HB210, used in curved hard armour plates produced by NFM Technology AS (NFM). The research offers a better understanding of the deformation behaviour and failure mechanisms of these composites under ballistic impact through experimental testing and numerical simulations. Ballistic impact tests utilised <span><math><mrow><mn>7</mn><mo>.</mo><mn>62</mn><mo>×</mo><mn>39</mn><mspace></mspace><mi>mm</mi></mrow></math></span> PS rounds, featuring in-situ deformation measurements using high-speed cameras combined with 3D Digital Image Correlation (3D-DIC) to capture high-resolution deformation data and backface deformation (BFD). To replicate human body impacts and measure BFD, plates were also tested with Roma Plastilina No. 1 clay backing. A new fibre-matrix-based constitutive model was applied in the IMPETUS Solver, making it the first time of Dyneema® HB210 being fitted to such a model. Numerical simulations, calibrated via inverse modelling, demonstrated good agreement with experimental results, capturing ballistic limit velocity, deformations, and failure mechanisms. The maximum BFD discrepancy between simulations and 3D-DIC measurements was 3.6%. The use of clay backing in experiments was effectively simulated, replicating the primary mechanisms observed during the ballistic impact tests. Future work should focus on conducting more experimental tests, refining material models and performing parametric studies.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"213 ","pages":"Article 113265"},"PeriodicalIF":5.7,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143821102","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}

引用次数: 0

In-plane behavior of discretely connected diaphragms in steel modular buildings 钢构件建筑中离散连接隔板的平面内性能

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-04-10 DOI: 10.1016/j.tws.2025.113302

Feng-Wei Shi , Yang Ding , Liang Zong , Wei Pan , Shuo Dong

{"title":"In-plane behavior of discretely connected diaphragms in steel modular buildings","authors":"Feng-Wei Shi , Yang Ding , Liang Zong , Wei Pan , Shuo Dong","doi":"10.1016/j.tws.2025.113302","DOIUrl":"10.1016/j.tws.2025.113302","url":null,"abstract":"<div><div>Steel modular buildings, predominantly connected through corner-tied connections, experience significant discontinuities within their module diaphragms. This study introduces a novel beam-tied connection for adjacent modules aimed at improving the integrity of discontinuous diaphragms and investigates the in-plane behavior of discretely connected diaphragms in steel modular buildings. Experimental tests were conducted to assess the failure modes, load-bearing capacity, hysteretic behavior, and deformation characteristics of these discontinuous diaphragms. A simplified model for discretely connected diaphragms was developed and validated against experimental results, highlighting its effectiveness in predicting diaphragm behavior. Substructure models of assembled modules with discretely connected diaphragms were developed to investigate the effects of connection spacing and stiffness on in-plane behavior. Results indicated that beam-tied connections effectively mitigate relative shear deformation between adjacent modules, thereby improving their in-plane load-transfer capacity. Increasing both the number and shear stiffness of beam-tied connections significantly enhances in-plane stiffness and reduces inter-module displacement, with the number of connections having a more pronounced effect. Finally, several design recommendations for beam-tied connections were provided to facilitate practical engineering applications.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"213 ","pages":"Article 113302"},"PeriodicalIF":5.7,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843167","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}

引用次数: 0

Structural reliability of the design of pallet-rack columns via Direct Strength Method 基于直接强度法的托盘架柱结构可靠性设计

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-04-10 DOI: 10.1016/j.tws.2025.113294

Victor A.M. Faria , Marcílio S.R. Freitas , André L.R. Brandão

{"title":"Structural reliability of the design of pallet-rack columns via Direct Strength Method","authors":"Victor A.M. Faria , Marcílio S.R. Freitas , André L.R. Brandão","doi":"10.1016/j.tws.2025.113294","DOIUrl":"10.1016/j.tws.2025.113294","url":null,"abstract":"<div><div>Rack columns are among the various structural components that compose pallet-rack storage systems. These columns possess complex geometries and hole patterns, making strength prediction challenging. Most design codes for pallet-rack structures rely on experimental tests to support strength prediction for the columns, while semi-analytical methods, such as the Direct Strength Method (DSM), have become predominant in the design of cold-formed steel members in compression. This paper evaluates the safety of rack column designs using adaptations of the DSM. The reliability analysis was based on reliability indices calculated through first order reliability analysis and Monte Carlo simulation (MCS). Load combinations were selected from the ANSI MH16.1 (LRFD), AISI S100/NBCC (LSD), and NBR 15524–2 standards to assess whether the design using the selected adaptations meets the target reliability indices across a selected range of product-to-dead load ratios. The seven pure semi-analytical adaptations did not achieve the target reliability values. Only methodologies employing the Reduced Thickness Method met the target for certain limit state. These methodologies were still imprecise for the local-global buckling limit state, necessitating the calibration of new resistance factors for potential future adoption in standards such as ANSI MH16.1 and NBR 15524–2.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"213 ","pages":"Article 113294"},"PeriodicalIF":5.7,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838665","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}

引用次数: 0

Hysteretic behavior of concrete filled thin-walled steel tubular K-joints with spherical-cap gap at chord 弦端球帽缝薄壁钢管混凝土k形节点滞回特性研究

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-04-10 DOI: 10.1016/j.tws.2025.113303

Yuxing Yang , Feiyu Liao , Yu Ren , Jian Zhou , Ying Wang

{"title":"Hysteretic behavior of concrete filled thin-walled steel tubular K-joints with spherical-cap gap at chord","authors":"Yuxing Yang , Feiyu Liao , Yu Ren , Jian Zhou , Ying Wang","doi":"10.1016/j.tws.2025.113303","DOIUrl":"10.1016/j.tws.2025.113303","url":null,"abstract":"<div><div>This study presents an experimental and numerical investigation of the hysteretic behavior of concrete filled thin-walled steel tubular K-joints with spherical-cap gaps. Twelve concrete-filled steel tubular (CFST) bottom chord-steel tubular web K-joint specimens were tested under cyclic loading applied to the thin-walled CFST chord. The influence of spherical-cap gap ratios, web-to-chord diameter ratios, and chord diameter-to-thickness ratios on the failure modes, overall structural behavior, load-carrying capacity, stiffness, and ductility was examined. Numerical analyses were conducted to validate the experimental results and perform parametric studies to further investigate the impact of gap ratios, geometry, and material properties on the structural behavior. Additionally, an in-depth analysis of the stress distribution between the web and CFST chord at the K-joint was performed to reveal the influence of spherical-cap gap on the load transfer mechanism. Existing design formulae were calibrated using proposed strength reduction factors to calculate the load-carrying capacity of these K-joints based on different failure modes. The results demonstrate that the presence of spherical-cap gaps can have a detrimental effect on the overall structural integrity. The findings of this study provide valuable insights for the design and safety assessment of thin-walled CFST K-joint connections in buildings and bridges.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"213 ","pages":"Article 113303"},"PeriodicalIF":5.7,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838664","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}

引用次数: 0

Multi-scale topology optimization for graded hollow lattice structures with variable wall thickness 变壁厚梯度空心点阵结构的多尺度拓扑优化

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-04-10 DOI: 10.1016/j.tws.2025.113274

Zhengtao Shu, Kang Zhao, Hao Li, Liang Gao

{"title":"Multi-scale topology optimization for graded hollow lattice structures with variable wall thickness","authors":"Zhengtao Shu, Kang Zhao, Hao Li, Liang Gao","doi":"10.1016/j.tws.2025.113274","DOIUrl":"10.1016/j.tws.2025.113274","url":null,"abstract":"<div><div>Considering the mechanical performance advantages of hollow truss-based lattice microstructures, this paper proposes a multi-scale topology optimization method for designing graded hollow lattice structures (GHLSs). The level set-based implicit representation method is used to construct hollow lattice microstructures with different configurations, and their mechanical properties are characterized using the asymptotic homogenization method. Compared to solid lattice microstructures, hollow lattice microstructures exhibit an improvement of at least 20 % in total stiffness and over 15 % in thermal conductivity. Subsequently, elasticity tensor scaling laws for the microstructures are constructed to avoid expensive iterative homogenization calculations during optimization. Based on these laws, multi-scale topology optimizations are performed considering the thermal conductivity and stiffness performance of the GHLS. The proposed hybrid level set method (HLSM) enables high-quality geometric reconstruction, ensuring the obtained GHLS have at least C<sup>0</sup> continuity. Finally, the thermal and stiffness performance of the GHLSs is compared and verified by finite element analysis (FEA) and experiments.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"213 ","pages":"Article 113274"},"PeriodicalIF":5.7,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843170","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}

引用次数: 0

Dynamic stability analysis of tapered rotating beams with 2D functionally graded materials: A comparative study of Floquet theory approaches 二维功能梯度材料锥形旋转梁的动力稳定性分析：Floquet理论方法的比较研究

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-04-10 DOI: 10.1016/j.tws.2025.113257

Moustafa S. Taima , Tamer A. El-Sayed , Michael I. Friswell

{"title":"Dynamic stability analysis of tapered rotating beams with 2D functionally graded materials: A comparative study of Floquet theory approaches","authors":"Moustafa S. Taima , Tamer A. El-Sayed , Michael I. Friswell","doi":"10.1016/j.tws.2025.113257","DOIUrl":"10.1016/j.tws.2025.113257","url":null,"abstract":"<div><div>This study investigates the dynamic and stability characteristics of rotating beams made from two-dimensional functionally graded materials (2D FGMs) with tapered geometry. Dynamics refers to the beam’s inherent vibrational behavior determined by its natural frequencies and/or time responses, and stability examines whether the system’s response remains bounded (stable) or becomes unbounded (unstable) under periodic excitation. The material properties are defined using a power law distribution model. The stiffness and mass matrices are derived based on the principle of virtual energy and evaluated using Bernoulli–Euler beam theories. Unlike previous studies, which often focus on single approaches, this research employs Floquet theory with three distinct techniques to evaluate the state transition matrix (STM), offering a comprehensive comparative analysis. The techniques investigated are the first-order step approximation, the improved integration method, and the second-order step approximation. The comparison identifies the most efficient approach in terms of accuracy and computational time, addressing limitations of existing methods. The impact of mean rotating speed, hub radius, dynamic amplitude factor, functionally graded (FG) material indexes, and taper ratio on the stability characteristics of the rotating 2D FGMs tapered beam is thoroughly analyzed. The results provide valuable insights into the dynamic behavior and stability of such beams, guiding the design and optimization of advanced rotating beam structures. The results indicate that the second-order approximation for computing the transition matrix achieves higher accuracy in predicting the instability boundaries compared to the first-order approximation, while being less time consuming than the improved integration method.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"213 ","pages":"Article 113257"},"PeriodicalIF":5.7,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828665","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}

引用次数: 0

Design, fabrication and mechanical properties of a new cylindrical lattice metamaterial 一种新型圆柱晶格超材料的设计、制造及力学性能

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-04-09 DOI: 10.1016/j.tws.2025.113292

Dong Han , Fan Yang , Pengfei Li , Puhao Li , Lingbo Li , Cuiping Bai , Hualin Fan , Xin Ren

{"title":"Design, fabrication and mechanical properties of a new cylindrical lattice metamaterial","authors":"Dong Han , Fan Yang , Pengfei Li , Puhao Li , Lingbo Li , Cuiping Bai , Hualin Fan , Xin Ren","doi":"10.1016/j.tws.2025.113292","DOIUrl":"10.1016/j.tws.2025.113292","url":null,"abstract":"<div><div>In this paper, a novel rotating sweep method was introduced for the design of lattice metamaterials. Using this method, we first designed a metal-lattice cylinder metamaterial with simple truss unit cell (Rhombic_cylinder) and prepared this metamaterial by the unsupported metal laser powder bed fusion (LPBF) technique. After the preparation of the specimen, microscopy test was used to examine the quality of the specimens and to verify the reliability of the manufacturing technique. Then, the mechanical properties of the Rhombic_cylinder metamaterial were studied through experimental and simulation methods, compared with those of the traditional 2D truss lattice (Truss_2D) metamaterial. The results show that the specific energy absorption and the equivalent elastic modulus of the Rhombic_cylinder are increased by 186 % and 600 %, respectively, compared with the traditional Truss_2D. In addition, the proposed structure was compared with the existing 2D and 3D lattice structures in the literature, showing exceptional advantages in the mechanical performance. Finally, we extended the rotating sweep method to the design of other 3D lattice structures, such as the hexagonal cylindrical lattice metamaterial, and studied their mechanical properties using the verified finite element (FE) numerical model. The results verified that the proposed rotating sweep method is applicable to different 2D lattice cell geometries to achieve improved mechanical properties. This design and fabrication approach provide a new paradigm for the development of metal lattice metamaterials, to be potentially applied to civil engineering, aerospace, vehicle collision avoidance and other fields.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"213 ","pages":"Article 113292"},"PeriodicalIF":5.7,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828664","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}

引用次数: 0