Thin-Walled Structures最新文献

{"title":"Dynamic analysis of the uncoiling process of multiple tape springs","authors":"Fengyuan Liu ,&nbsp;Minger Wu (Professor) ,&nbsp;Ping Xiang ,&nbsp;Jae-Yeol Kim","doi":"10.1016/j.tws.2025.113079","DOIUrl":"10.1016/j.tws.2025.113079","url":null,"abstract":"<div><div>Tape springs are fundamental deployable components critical to the functionality of deployable space structures, achieving a high ratio of retraction and deployment through coiling and uncoiling mechanisms. This paper investigates the dynamic uncoiling of multiple tape springs coiled around a central hub. Accounting for the superposition of the thickness of the coiled part due to the number of tape springs and coil turns, the longitudinal section shape of the coiled part is approximated as an Archimedean spiral, and the theoretical model for the uncoiling process is established. The angular velocity and deployment time of the tape springs, along with their reaction torque on the central hub during uncoiling, are derived using the Lagrange equation. A finite element model is created using commercial software ABAQUS to simulate the dynamic uncoiling of the tape springs. Additionally, experiments are conducted utilizing a specially designed uncoiling setup within a vacuum test chamber, complemented by a high-speed image recording and processing system. Comparisons across theoretical, numerical, and experimental methods reveal strong agreement, thereby validating the accuracy of the proposed theoretical model.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113079"},"PeriodicalIF":5.7,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488076","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":"Experimental verification of ultra-broadband vibration reduction of underwater vehicle pressure-resisting shells using acoustic black holes","authors":"Nansha Gao,&nbsp;Zhicheng Zhang,&nbsp;Yiting Li,&nbsp;Guang Pan","doi":"10.1016/j.tws.2025.113118","DOIUrl":"10.1016/j.tws.2025.113118","url":null,"abstract":"<div><div>The aim of this paper is to design acoustic black hole structures for underwater pressure-resistant shells (PRSs), including single- and double-leaf structures, which are applied to the inner and outer PRS surfaces. The mean square velocity and displacement modes on the shell surface indicate that surface vibrations above the cutoff frequency can be effectively attenuated. Three sets of experiments are designed, i.e., PRS under white noise point excitation and underwater vehicle motor under no-load and load conditions. The data acquired at key measuring points reveal that the vibration acceleration on the shell surface has a significant attenuation effect in most of the frequency bands from 0.001 to 25 kHz, with a maximum attenuation of up to two orders of magnitude. It is particularly effective in suppressing strong vibrations at the switching frequency of underwater vehicle motors. The paper conclusions of this study can be directly applied to vibration and noise reduction systems for underwater equipment. Moreover, they offer another insights for developing potential broadband vibration and noise reduction structures.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113118"},"PeriodicalIF":5.7,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488130","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":"Compressive failure mechanisms of fibre metal laminates with 2/1 and 3/2 configurations after low-velocity impact","authors":"Zheng-Qiang Cheng ,&nbsp;Jie Xia ,&nbsp;Hu Liu ,&nbsp;Zhi-Wu Zhu ,&nbsp;Wei Tan","doi":"10.1016/j.tws.2025.113112","DOIUrl":"10.1016/j.tws.2025.113112","url":null,"abstract":"<div><div>The residual compressive strength after low-velocity impact (LVI) serves as a pivotal metric for assessing the damage tolerance of composite structures. This paper aims to elucidate the compressive failure mechanisms of glass fibre/aluminium fibre metal laminates (FMLs) that have incurred initial LVI damage, meanwhile illustrating the effects of fibre orientation, impact energy and laminate configuration on the compressive failure behaviours of FMLs. Initially, specific impact damage was prefabricated and examined in FMLs with 2/1 and 3/2 configurations. Quasi-static compression tests were then conducted to analyse the global force versus displacement responses and local strain evolution of FMLs during compressive loading. Furthermore, visual inspection, ultrasonic C-scan, and CT-scan were employed to explain the damage morphologies and failure mechanisms of FMLs. Finally, the comparative analysis of the compression after impact (CAI) strengths was conducted for different FMLs. The results demonstrate that fibre orientation, impact energy and laminate configuration significantly affect the compressive mechanical responses and damage morphologies of FMLs. Moreover, FMLs experience a 40–61 % decrease in compressive strength after LVI within the energy range from 35 J to 65 J. Additionally, the 3/2 configuration is a more advantageous laminate design than the 2/1 configuration in terms of specific CAI strength and residual strength ratio. This research contributes novel insights into the impact damage tolerance of FMLs, which hold promise as load-bearing structural materials in aeronautic applications.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113112"},"PeriodicalIF":5.7,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143473981","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":"Similarity studies of acoustic radiation in different media induced by mechanical excitations inside a single-layer cylindrical shell","authors":"Yiming Zhang ,&nbsp;Qiuchen Ma ,&nbsp;Zhaodong Lin ,&nbsp;Yu Xia ,&nbsp;Wei Yu ,&nbsp;Mangong Zhang ,&nbsp;Zhigao Zhao ,&nbsp;Hong Chen ,&nbsp;Lili Wu ,&nbsp;Aiguo Zhao","doi":"10.1016/j.tws.2025.113102","DOIUrl":"10.1016/j.tws.2025.113102","url":null,"abstract":"<div><div>This paper investigated the similarities in vibration and acoustic radiation characteristics of single-layer cylindrical shells subjected to mechanical excitations in different media. Based on acoustic similarity principle, the dimensionless coefficients under the condition of equal similarity numbers were derived using the dimensional theory, and the acoustic similarity conditions of cylindrical shells in water and air were given. In addition, the similarity of vibration and acoustic radiation in different media was verified through numerical simulations. The results show that the predictions of vibration and acoustic radiation from the results obtained in air were in good agreement with the results in water. Notably, in the low frequency bands, the predicted radiated sound power level and sound pressure level directivity curves exhibited significant overlap with the results in water. Although deviations were observed at higher frequencies due to the effects of acoustic wave fluctuations and fluid medium properties, these discrepancies were minor, and the numerical results remained consistent with the established similarity relationships. Furthermore, an examination of stiffened cylindrical shells confirmed the applicability of the proposed similarity theory to more complex thin shell structures. Experimental validations indicate that this method has certain applicability. However, the experimental results and numerical prediction results have discrepancies in some frequency bands.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113102"},"PeriodicalIF":5.7,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480013","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 forced vibration and stability analysis of a rotating three-dimensional cantilever beam with variable cross-section","authors":"Hang Li,&nbsp;Guo Yao","doi":"10.1016/j.tws.2025.113104","DOIUrl":"10.1016/j.tws.2025.113104","url":null,"abstract":"<div><div>This article investigates the nonlinear forced vibration of a rotating three-dimensional variable cross-section cantilever beam under uniformly distributed harmonic loads. Incorporating the effects of Coriolis terms, static axial deformation, and geometric nonlinearity, the nonlinear partial differential equations for a rotating variable cross-section Euler-Bernoulli beam are derived using Hamilton's principle. The Galerkin method discretizes these equations into nonlinear ordinary differential equations. Numerical simulations are conducted to present the amplitude-frequency and time-history responses, illustrating the nonlinear dynamic characteristics of the rotating variable cross-section cantilever beam. The effects of rotational speed, hub radius, excitation amplitude, and cross-section change rate on the stability, nonlinear principal resonance, and superharmonic resonance of the rotating beam system are discussed. Results show the fundamental natural frequency increases with the increase of the hub radius, rotational speed, and cross-section change rate. Furthermore, the cross-section change rate significantly impacts the nonlinear vibration response of the system.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113104"},"PeriodicalIF":5.7,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488323","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":"Low-velocity impact and compression-after-impact behaviors of carbon/glass fiber hybrid composite laminates based on thin-ply carbon fiber prepreg and unidirectionally arrayed chopped strand","authors":"Yinyuan Huang ,&nbsp;Ya Liu ,&nbsp;Haohao Liu ,&nbsp;Siqi Zhang ,&nbsp;Junfeng Hu ,&nbsp;Jianping Zhao","doi":"10.1016/j.tws.2025.113075","DOIUrl":"10.1016/j.tws.2025.113075","url":null,"abstract":"<div><div>The impact resistance is one of the most important mechanical properties of lightweight fiber-reinforced polymer composites (FRPs), which directly affects its application in engineering fields. However, due to the inherent brittleness of fibers, the mutual exclusion of strength and toughness has become one of the bottlenecks in FRP design. Considering the effect of hybrid structure and short fiber on improving the pseudo-ductility of FRP laminates, in this study, short fiber structures were prepared by introducing discontinuous slits into the thin-ply carbon fiber prepregs and mixing with glass fiber prepregs to fabricate carbon/glass fiber hybrid laminates (C/G). Low-velocity impact (LVI) tests and compression-after-impact (CAI) tests were carried out at energy levels of 15 J, 20 J, 25 J, and 30 J. The full-field displacement of specimens during CAI was captured by three-dimensional digital image correlation (3D-DIC). In addition, how the damage morphology varies spatially due to the different deformation and damage modes is learned from X-ray micro-computed tomography (Micro-CT) techniques. The experimental results indicate that the S2-UACS specimen exhibits the most outstanding impact resistance. Based on the visualization characteristics of C/G hybrid laminates, it is observed that the delamination on the backside of the C/G hybrid laminates is improved by introducing discontinuous slits. The degree of LVI damage significantly affects the CAI damage tolerance of the laminates. After impact at energies from 15 to 30 J, the CAI strengths of the C/G hybrid laminates with the discontinuous fiber structure are 9.94 %, 25.61 %, 10.29 %, and 11.69 % higher, respectively, than those of the continuous carbon fiber laminates. Furthermore, micro-CT revealed that the introduction of slits restrains the occurrence of fiber buckling and delamination propagation in C/G hybrid laminates during the CAI test.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113075"},"PeriodicalIF":5.7,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471670","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":"Close-range blast behavior of hybrid FRP-concrete-steel double-skin tubular member","authors":"Weiqiang Wang ,&nbsp;Zibo Wang ,&nbsp;Minghong Li ,&nbsp;Zhilong Xiong ,&nbsp;Da Chen ,&nbsp;Chengqing Wu","doi":"10.1016/j.tws.2025.113022","DOIUrl":"10.1016/j.tws.2025.113022","url":null,"abstract":"<div><div>This research experimentally and numerically investigates the dynamic response of hybrid fiber reinforced polymer (FRP)-concrete-steel double-skin tubular member (DSTM) under close-range blast load. Three DSTMs, 2500 mm in length and 200 mm in diameter, were designed and tested under close-range blast load at a scaled distance of 0.251 m/kg^1/3. The blast pressure-time histories, damage modes and deflection characteristics of blasted DSTMs were acquired and analyzed. The test results demonstrate that the DSTMs exhibit highly localized damage mode (FRP tube ruptures and concrete fragmentations) under close-range blast load. Partial concrete filling into steel tube and adding steel ribs can both improve the blast resistant capacity of DSTM, with the effect of steel ribs more pronounced. Afterwards, refined numerical models were established, and the models’ accuracies were validated using the current test data. The validated models were used to reveal the blast resistant mechanism of DSTM, including the damage evolution, energy absorption mechanism, and confinement/protective effect from FRP tube. Furthermore, parametric analyses were conducted to study the effects of blast scaled distance, void ratio, and steel rib configurations on the close-range blast behavior of DSTM.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113022"},"PeriodicalIF":5.7,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479327","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":"Deep learning-based study of strength variance coefficient for large diameter thin-walled structures","authors":"Hongfei Fu,&nbsp;Weixiu Xv,&nbsp;Fan Yang,&nbsp;Liangliang Jiang,&nbsp;Yuhong Shi","doi":"10.1016/j.tws.2025.113059","DOIUrl":"10.1016/j.tws.2025.113059","url":null,"abstract":"<div><div>Strength variation coefficient is a basic parameter to carry out structural reliability design and assessment, for the large diameter thin-walled structure test to obtain the strength variation coefficient is expensive, this paper is based on the actual measurement of the product information, the application of finite element simulation and analysis methods, comprehensive consideration of the material properties, structural dimensions and geometrical uncertainty factors, put forward a method for the study of strength variation coefficients of thin-walled structures based on multi-head CNN. Taking the multi-wall panel welded stiffened rocket tank cylinder section as the research object, the geometric imperfection of a single panel is used as a sub-sample, and the particle swarm optimisation based inter-wall panel connection coordination method is used to achieve the geometric imperfection random field construction; relying on a small number of experiments, a multi-head convolutional network structure is used to realise the fusion of uncertain features of material properties, structural dimensions and geometrical imperfections at different scales, to efficiently establish an ‘uncertainty-response’ mapping model, and to realise the prediction of strength variation coefficients at low cost. The research results show that the method is able to identify the complex action law of geometrical imperfection on structural bearing, and the accuracy of the prediction of bearing capacity is more than 99.2%; it can realise the accurate quantitative analysis of the coefficient of variation of the strength of thin-walled structure and its influencing factors, and the predicted coefficient of variation of the structural strength of the structure is reasonably encompassed by the upper limit of the test value.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113059"},"PeriodicalIF":5.7,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480010","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":"Experimental study on wind-induced fatigue performance of standing seam metal cladding systems with anti-wind clips","authors":"Qingshan Yang,&nbsp;Ze Wang,&nbsp;Min Liu,&nbsp;Qisheng Liang,&nbsp;Shidong Nie,&nbsp;Ruolin Liu,&nbsp;Wei Chen","doi":"10.1016/j.tws.2025.113099","DOIUrl":"10.1016/j.tws.2025.113099","url":null,"abstract":"<div><div>Standing seam metal cladding systems with anti-wind clips are extensively used in public buildings located in regions prone to strong winds. These reinforced seam-clip connections are susceptible to fatigue effects when subjected to long-term fluctuating wind loads. The complex mechanical behaviors of these connections contribute to a complex fatigue-induced failure mechanism, which is crucial for evaluating the fatigue performance of the systems but has received limited attention in existing studies. This study systematically analyzed the fatigue-induced failure mechanism of such systems using an air pressure box and prototype specimens. Quasi-static tests were conducted initially to determine the ultimate bearing capacity of the systems, followed by dynamic fatigue tests involving eight loading scenarios with various amplitudes. The study found significant differences between pull-out failures in static tests and tearing failures in dynamic tests. High stress concentration zones, particularly at metal sheet contacts with anti-wind clips and bending areas, can exacerbate damage accumulation under dynamic loads. These zones can initiate cracks when the cycle reaches 47 % of the fatigue life and expedite their propagation, ultimately leading to tearing failure. The dynamic response has been analyzed, with differences from the static response quantified. To assess the resistance capacity of systems to tearing failures, a fatigue life model was proposed to elucidate the relationship between load amplitudes and cycles. A diminishing trend in the model with the increase of amplitudes indicates that the fatigue resistance capacity is susceptible to high load amplitudes. These findings can effectively evaluate the fatigue resistance capacity of the systems.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113099"},"PeriodicalIF":5.7,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464239","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":"Analytical model for stress calculation of ultra-thin cobalt chromium L605 coronary stent","authors":"Amr F. Mohamed ,&nbsp;Chahinaz A. Saleh ,&nbsp;Youngjae Chun ,&nbsp;Chang Hun Kum ,&nbsp;Jae Hwa Cho ,&nbsp;Gyuhyun Jin ,&nbsp;Sang Hyun An ,&nbsp;Moataz Elsisy","doi":"10.1016/j.tws.2025.113097","DOIUrl":"10.1016/j.tws.2025.113097","url":null,"abstract":"<div><div>Coronary stents play a vital role in interventional cardiology by preventing artery collapse and ensuring blood flow after angioplasty. These mesh-like devices have seen significant advancements in materials, design, and drug-eluting technologies to minimize restenosis and improve long-term outcomes. Despite extensive research on both balloon-expandable and self-expandable stents, there remains a notable lack of mathematical models specifically tailored to balloon-expandable stents. This study addresses that gap by introducing a novel analytical model based on curved beam theory and geometric relations, providing a rapid and reliable method for evaluating the elastoplastic behavior of balloon-expandable stents, particularly those with curved hinges. This offers a significant advantage in optimizing stent performance. The mechanical behavior of a newly designed ultra-thin cobalt chromium stent, as described in our previous research, is evaluated through comprehensive simulations using ANSYS Workbench. Finite Element Analysis (FEA) offers critical insights into stress, strain, and residual stress, with stress concentrations primarily located at the inner radius of the curved hinges. The close alignment between the analytical model and FEA results validates the model's accuracy. Furthermore, the model is used to examine the effect of geometric parameters, such as the number of circumferential cells and the length of connecting links, on stent performance. These insights help identify optimal design parameters for reducing stress.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113097"},"PeriodicalIF":5.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480012","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}