Thin-Walled Structures最新文献_第2页

Dynamic instability analysis of folded sandwich plates with honeycomb core via conforming multi-patch isogeometric analysis including design considerations 考虑设计因素的蜂窝芯折叠夹层板的多块等几何分析

IF 6.6 1区工程技术

Thin-Walled Structures Pub Date : 2025-10-01 DOI: 10.1016/j.tws.2025.114050

Mohammad Reza Ghovehoud, Mojtaba Azhari, Saeid Sarrami

{"title":"Dynamic instability analysis of folded sandwich plates with honeycomb core via conforming multi-patch isogeometric analysis including design considerations","authors":"Mohammad Reza Ghovehoud, Mojtaba Azhari, Saeid Sarrami","doi":"10.1016/j.tws.2025.114050","DOIUrl":"10.1016/j.tws.2025.114050","url":null,"abstract":"<div><div>This article investigates the dynamic instability of folded sandwich plate structures through a meticulous and comprehensive approach. These structures comprise sandwich plates with a honeycomb core and aluminum protective layers, which serve as their primary components. The governing equations are derived using the first-order shear deformation theory (FSDT) to analyze the dynamic instability. Given that each folded plate structure comprises multiple plates with varying dimensions and angles, the Conforming Multi-patch Isogeometric method is employed to accurately model the structure and solve the governing equations. The results obtained are compared with data from reputable published studies to validate the accuracy and reliability of the proposed Isogeometric analysis (IGA) method. This comparison confirms the method’s credibility and highlights its high precision in evaluating the dynamic stability of folded plate structures. Furthermore, the study investigates the influence of various parameters on the dynamic stability performance of these structures. It also examines how the geometric and mechanical properties of honeycomb cores, specifically hexagonal and re-entrant structures in combined cell geometries, affect the dynamic stability of the structure under different conditions.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114050"},"PeriodicalIF":6.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145221525","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

Formability and failure mechanisms of ultra-thin TA2 titanium sheets in microchannel hydroforming: Effect of thickness-to-grain-size ratio 超薄TA2钛板微通道流体成形性能及失效机理：厚度与晶粒尺寸比的影响

IF 6.6 1区工程技术

Thin-Walled Structures Pub Date : 2025-10-01 DOI: 10.1016/j.tws.2025.114042

Yong Xu , Muhammad Farooq Saleem , Gao Mingyu , Wen long Xie , Shi-Hong Zhang , Hong liang Zhu , Boris B. Khina , Artur I. Pokrovsky

{"title":"Formability and failure mechanisms of ultra-thin TA2 titanium sheets in microchannel hydroforming: Effect of thickness-to-grain-size ratio","authors":"Yong Xu , Muhammad Farooq Saleem , Gao Mingyu , Wen long Xie , Shi-Hong Zhang , Hong liang Zhu , Boris B. Khina , Artur I. Pokrovsky","doi":"10.1016/j.tws.2025.114042","DOIUrl":"10.1016/j.tws.2025.114042","url":null,"abstract":"<div><div>The forming limit behavior of ultra-thin TA2 titanium sheets under microchannel hydroforming is critically affected by the ratio of sheet thickness (t) to grain size (d). In this study, the impact of varying t/d ratios on formability was systematically evaluated using an integrated experimental and finite element (FE) methodology. Forming limit curves (FLCs) were determined for sheets with t/d ratios spanning 1 to 5.21. The results indicate a pronounced decrease in the plane-strain forming limit for t/d values below 5.21, correlating with heightened susceptibility to localized thinning and fracture, particularly at microchannel bends and corners. To address the limitations of direct FLC measurement at low t/d, a hybrid experimental-numerical framework was introduced, enabling virtual FLC prediction. Strain path analysis and FE simulations identified the upper corner regions of the microchannel as most prone to failure, characterized by thickness-direction thinning exceeding 20% under plane strain conditions. The proposed approach establishes a direct relationship between microstructural state, deformation mode, and failure, offering a robust strategy for optimizing process parameters and structural integrity. These findings advance the design and manufacture of ultra-thin titanium components for energy and microfluidic applications, including fuel cell bipolar plates.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114042"},"PeriodicalIF":6.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267423","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

Local buckling behaviour of titanium-clad bimetallic steel circular hollow section stub columns 包钛双金属钢圆空心截面短柱的局部屈曲行为

IF 6.6 1区工程技术

Thin-Walled Structures Pub Date : 2025-10-01 DOI: 10.1016/j.tws.2025.114039

Chenyang Huang , Huiyong Ban , Yuanqing Wang , Yongjiu Shi

{"title":"Local buckling behaviour of titanium-clad bimetallic steel circular hollow section stub columns","authors":"Chenyang Huang , Huiyong Ban , Yuanqing Wang , Yongjiu Shi","doi":"10.1016/j.tws.2025.114039","DOIUrl":"10.1016/j.tws.2025.114039","url":null,"abstract":"<div><div>This paper investigates the local buckling behaviour of titanium-clad (TC) bimetallic steel circular hollow section (CHS) stub columns under compression through experimental and numerical studies. Five CHS stub columns were tested with measurement of four types of tensile coupons and local geometric imperfections. In parallel with the experimental investigation, FE models were established and validated with the consideration of welding joint construction, element types, and material strategies. After validation, a selected FE model was employed for parametric studies, where a total of 320 numerical simulations were derived with different diameter-to-thickness ratios, material combinations, and clad ratios. The existing design standards were evaluated with the parametric results, and recommendations for design methods for the TC bimetallic steel CHS were proposed. Additionally, the study demonstrates that clad ratios significantly affect the bearing capacity of the TC bimetallic steel CHS stub columns due to the different plastic hardening capability and elastic modulus of cladding and substrate layers. A modified design method based on prEN 1993-1-1:2018 was proposed to accurately account for the influence of clad ratio. The present study provides a foundation for developing more accurate cross-section design rules for TC bimetallic steel member in future research.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114039"},"PeriodicalIF":6.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267985","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

Impact of polyurethane (PU) infill on the energy absorption efficiency of 3D-printed metallic Menger fractal structures 聚氨酯（PU）填料对3d打印金属门格尔分形结构吸能效率的影响

IF 6.6 1区工程技术

Thin-Walled Structures Pub Date : 2025-10-01 DOI: 10.1016/j.tws.2025.114045

Madhusha Bogahawaththa , Damith Mohotti , Kasun Wijesooriya , Chi King Lee

{"title":"Impact of polyurethane (PU) infill on the energy absorption efficiency of 3D-printed metallic Menger fractal structures","authors":"Madhusha Bogahawaththa , Damith Mohotti , Kasun Wijesooriya , Chi King Lee","doi":"10.1016/j.tws.2025.114045","DOIUrl":"10.1016/j.tws.2025.114045","url":null,"abstract":"<div><div>In this study, polyurethane (PU) infilled Menger fractal cubes (MFC) were studied for their energy absorption performance. Three different fractal orders were fabricated using selective laser melting (SLM) and studied both experimentally and numerically to investigate their compressive behaviour at 0.001 s<sup>-1</sup> strain rate. Compression tests reveal a synergistic effect between the PU and MFC, where the filled cubes showed greater load-bearing capacity than the hollow structures, demonstrating an ideal energy-absorbing response. The total energy absorption of PU-infilled cubes was higher than that of hollow cubes, while the specific energy absorption (SEA) remained relatively consistent (45–50 J/g). The PU-infilled MFCs demonstrated densification displacements nearly equivalent to hollow MFCs, indicating superior compressibility. Moreover, the higher-order PU-infilled MFCs exhibited two staged ideal energy-absorbing responses within their plateau regions, highlighting their suitability for higher energy-absorbing applications. Finite element modelling (FEM) predicted the stress concentration points, validated with experimental evidence. Additionally, the validated finite element models were utilised to predict the energy absorption response of the fourth-order MFC, and the internal behaviour was thoroughly examined. The study highlights the potential of PU-infilled MFCs in applications requiring robust impact resistance and energy absorption, such as protective elements in the automotive and aerospace industries.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114045"},"PeriodicalIF":6.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267990","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

Enhancement of the load-bearing capacity of WHSJs based on welding deposition 基于焊接沉积技术提高焊接混凝土的承载能力

IF 6.6 1区工程技术

Thin-Walled Structures Pub Date : 2025-10-01 DOI: 10.1016/j.tws.2025.114044

Song Zhou , Zhongwei Zhao , Yu Yan , Zhancai Lao

引用次数: 0

Data-driven deep neural network approach for magnetoelectric effects in functionally graded piezoelectric/piezomagnetic spherical shells with material parameters uncertainties 材料参数不确定的功能梯度压电/压磁球壳磁电效应的数据驱动深度神经网络方法

IF 6.6 1区工程技术

Thin-Walled Structures Pub Date : 2025-10-01 DOI: 10.1016/j.tws.2025.114037

Fengjun Li , Jun Xie , Pengpeng Shi , Qingyun Wang

{"title":"Data-driven deep neural network approach for magnetoelectric effects in functionally graded piezoelectric/piezomagnetic spherical shells with material parameters uncertainties","authors":"Fengjun Li , Jun Xie , Pengpeng Shi , Qingyun Wang","doi":"10.1016/j.tws.2025.114037","DOIUrl":"10.1016/j.tws.2025.114037","url":null,"abstract":"<div><div>Analyzing the magnetoelectric (ME) effect and optimal design of layered functionally graded piezoelectric/piezomagnetic (FGPEPM) structures are important in applications. This study addresses the issue of material parameter uncertainties related to the ME effect in layered FGPEPM spherical shells characterized by volume fraction gradients. Closed-form expressions for the magneto-electro-elastic fields and the ME effect are derived under the power-law gradient model, providing benchmark solutions for spherical structures. For cases involving arbitrary property gradients, the finite difference method (FDM) is employed to investigate magneto-electro-elastic multi-field coupling responses and the associated ME effect. To address uncertainties in material properties, an interval random uncertainty model is newly proposed. More significantly, a data-driven deep neural network (NN) framework is developed as a computationally efficient surrogate to achieve rapid uncertainty quantification and optimization of the ME effect, overcoming the high computational cost of traditional FDM. The findings demonstrate that material parameter uncertainties significantly alter the ME coupling behavior, with the NN approach achieving high-precision predictions while dramatically improving computational efficiency. This work makes four primary contributions: establishing novel analytical solutions for FGPEPM spherical shells; developing a generalized numerical framework for arbitrary gradients; introducing an efficient NN-based uncertainty quantification method; and enabling optimal design under material uncertainties.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114037"},"PeriodicalIF":6.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267984","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

Mechanical properties of CMT-WAAM 2209 duplex stainless steel at elevated temperatures in a fire CMT-WAAM 2209双相不锈钢在高温下的机械性能

IF 6.6 1区工程技术

Thin-Walled Structures Pub Date : 2025-10-01 DOI: 10.1016/j.tws.2025.114043

Mei Liu , Bingyan Tang , Jiemeng Liu , Yicun Chang , Peijun Wang , Liming Jiang

{"title":"Mechanical properties of CMT-WAAM 2209 duplex stainless steel at elevated temperatures in a fire","authors":"Mei Liu , Bingyan Tang , Jiemeng Liu , Yicun Chang , Peijun Wang , Liming Jiang","doi":"10.1016/j.tws.2025.114043","DOIUrl":"10.1016/j.tws.2025.114043","url":null,"abstract":"<div><div>To investigate the mechanical properties at elevated temperatures of Cold Metal Transfer-Wire Arc Additive Manufacturing (CMT-WAAM) 2209 duplex stainless steel, 63 tensile specimens were tested under steady-state elevated temperatures simulating conditions in a fire, which were achieved using an electric heating furnace. The tensile specimens were cut from the CMT-WAAM plates using ER2209 duplex stainless steel wire with a diameter of 1 mm. The tests covered three loading directions (0°, 45°, and 90°) and seven different temperature levels (300 °C to 900 °C). Combining Digital Image Correlation (DIC) technology, stress-strain curves at elevated temperatures were captured for all specimens, from which in-fire key mechanical properties were extracted and compared against mechanical properties at ambient temperature. Microstructural analysis was also conducted to investigate the evolution and fracture mechanisms at elevated temperatures. Results demonstrated that increasing temperature significantly enhanced ductility but reduced the strength of the material. The residual mechanical properties at elevated temperatures were analyzed, and existing reduction factors of traditional duplex stainless steels were evaluated based on the test data. It was found that existing prediction expressions were not suitable for CMT-WAAM 2209 duplex stainless steel at elevated temperatures. A new constitutive model was proposed to accurately predict the in-fire stress-strain response of the printed material. The results of this study provide engineers with references for assessing the in-fire residual strength of CMT-WAAM 2209 duplex stainless steel and guide fire-resistant design.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114043"},"PeriodicalIF":6.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267988","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

Global stability performance of corroded H–shaped steel members under axial compression 腐蚀h型钢轴压下整体稳定性能

IF 6.6 1区工程技术

Thin-Walled Structures Pub Date : 2025-10-01 DOI: 10.1016/j.tws.2025.114041

Yongqiang Zhang , Lisheng Luo , Tianshuai Duan , Song Li , Xiaoqi Zhu , Boshan Chen , Kaidong Wu

{"title":"Global stability performance of corroded H–shaped steel members under axial compression","authors":"Yongqiang Zhang , Lisheng Luo , Tianshuai Duan , Song Li , Xiaoqi Zhu , Boshan Chen , Kaidong Wu","doi":"10.1016/j.tws.2025.114041","DOIUrl":"10.1016/j.tws.2025.114041","url":null,"abstract":"<div><div>Steel members exposed to natural environments are susceptible to corrosion, leading to degradation of their load–carrying capacity. As typical axial compression members, H–shaped steel members demonstrate rapid failure characteristics during global buckling, nearly leaving no time for effective remedial intervention. Current design codes lack explicit formulas for calculating the axial compression stability of corroded H–shaped members. This study conducted electrolytic accelerated corrosion and axial compression tests on 10 H–shaped specimens, obtaining load–lateral displacement curves and quantifying the degradation patterns of ultimate load–carrying capacity with increasing corrosion rates. An equivalent thickness method was proposed based on the reduction in the yield load of corroded tensile specimens, which indirectly accounts for stress concentration induced by pitting corrosion. Validated finite element models were employed for parametric analysis. Then, a novel theoretical formula was derived for calculating the ultimate load–carrying capacity, which is in the form of a continuous function. The proposed formula demonstrates applicability to corroded H–shaped members, achieving a maximum error of 7.28% compared to experimental results.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114041"},"PeriodicalIF":6.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267420","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

FE-based assessment of the resistance of steel joints using strain averaging 基于应变平均法的钢筋连接阻力评估

IF 6.6 1区工程技术

Thin-Walled Structures Pub Date : 2025-09-30 DOI: 10.1016/j.tws.2025.114038

Luís Simões da Silva , Jorge Conde , Fernando Freire Ribeiro , Filip Ljubinković

{"title":"FE-based assessment of the resistance of steel joints using strain averaging","authors":"Luís Simões da Silva , Jorge Conde , Fernando Freire Ribeiro , Filip Ljubinković","doi":"10.1016/j.tws.2025.114038","DOIUrl":"10.1016/j.tws.2025.114038","url":null,"abstract":"<div><div>Strain, defined as deformation per unit length, is, by nature, an averaged magnitude. Experimental values of strain, linked to the actual length of samples (coupon tests), are accepted as representative of the material and used for modelling. These constitutive values are inherently different from the point values retrieved from finite element (FE) models, highly dependent on mesh type and size. Moreover, strain is not a primary analysis variable on the FE method, so mesh refinement resulting in displacement convergence may not necessarily yield peak strain convergence. This paper proposes a methodology to determine peak strains that are invariant across different mesh discretizations satisfying global convergence criteria. Such a methodology is required because of the increasing use of advanced numerical design calculations using the finite element method that require resistance criteria based on local maximum peak strains, such as part 1–14 of Eurocode 3. This work presents a novel averaging procedure for strains (‘bubble averaging’), based on a weighted average on increasingly large volumes, surfaces, or lines around a point of interest. The procedure is formulated for solid models, and its specific application is demonstrated for a steel connection component, both isolated and integrated on a joint, and shown to result in stable, mesh-independent values.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114038"},"PeriodicalIF":6.6,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267422","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

Multifunctional performance of 3D-printed helmet liners under impact and blast loadings 3d打印头盔衬垫在冲击和爆炸载荷下的多功能性能

IF 6.6 1区工程技术

Thin-Walled Structures Pub Date : 2025-09-30 DOI: 10.1016/j.tws.2025.114036

Kaiming Xu , Junxiang Ji , Hao Feng , Jun Lin , Yongqiang Li

{"title":"Multifunctional performance of 3D-printed helmet liners under impact and blast loadings","authors":"Kaiming Xu , Junxiang Ji , Hao Feng , Jun Lin , Yongqiang Li","doi":"10.1016/j.tws.2025.114036","DOIUrl":"10.1016/j.tws.2025.114036","url":null,"abstract":"<div><div>To address the growing demand for lightweight and multifunctional protection against combined blunt and blast loadings, the study designed, fabricated, and experimentally evaluated novel foam-filled helmet liner structures. Two types of liner architectures, including lattice and honeycomb, were manufactured using EPU 45 elastomer through 3D printing. Energy absorption performance was assessed through uniaxial compression tests, while impact mitigation capabilities were evaluated using low-velocity impact tests (4 m/s and 5 m/s) with a Hybrid III dummy head. Shock wave attenuation was examined using a shock tube under incident overpressures of 100 kPa and 200 kPa. The results demonstrated that honeycomb structures exhibit higher energy absorption and HIC<sub>15</sub> with a heavier weight, whereas the single-type lattice offered lower energy absorption and HIC<sub>15</sub> with reduced weight. In contrast, hybrid graded lattices achieved an optimal balanced performance, combining efficient energy absorption, reduced HIC<sub>15</sub>, and a relatively lower weight. Furthermore, all foam-filled lattices achieved over 90 % shock wave attenuation efficiency. The foam-filled Kagome–Voronoi and Kelvin–Voronoi graded lattices demonstrated superior overall performance in energy absorption, impact mitigation, and shock wave attenuation within the constrained clearance between helmet and head, offering a robust theoretical and experimental foundation for the development of next-generation lightweight, high-performance helmet liners.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114036"},"PeriodicalIF":6.6,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145268044","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