Thin-Walled Structures最新文献

{"title":"Viscoelastic damping design - Experimental analysis of optimized constrained layer damping treatments at different ambient temperatures","authors":"Martin Gröhlich ,&nbsp;Marc Böswald ,&nbsp;Jörg Wallaschek","doi":"10.1016/j.tws.2026.114563","DOIUrl":"10.1016/j.tws.2026.114563","url":null,"abstract":"<div><div>Constrained Layer Damping (CLD) is an established technology for passive vibration damping. Vibrational energy is dissipated by forcing a viscoelastic material into shear strain. However, the damping performance of CLD treatments is highly dependent on the temperature and the design of such structures can be tailored to operational conditions.</div><div>This paper presents an experimental analysis of shape-optimized CLD treatments over a temperature range from -20 °C to +20 °C. The samples were designed and manufactured with respect to maximum damping of the first bending mode at minimum and maximum temperature. Eigenfrequencies and damping ratios identified from a modal test in a climatic chamber are compared with those obtained from numerical simulations. The comparison shows a good correlation of the modal parameters. The results demonstrate that using the widths of virtually segmented core and face layers as design parameters is a valid approach for shape optimization of CLD treatments. Furthermore, it is proven that the optimal shape of a CLD treatment is temperature-dependent and that its damping performance varies with the ambient temperature condition.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"222 ","pages":"Article 114563"},"PeriodicalIF":6.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146039065","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":"Effects of column design variations on seismic performance of steel moment-resisting frames with fuse connections","authors":"Sangwook Park ,&nbsp;Joseph Gilroy ,&nbsp;Patricia Clayton ,&nbsp;Alex Dundore ,&nbsp;Sebastian Acevedo","doi":"10.1016/j.tws.2026.114565","DOIUrl":"10.1016/j.tws.2026.114565","url":null,"abstract":"<div><div>Fuse connections featuring replaceable components that yield before beams or columns have been proposed for steel special moment-resisting frames (SMRFs) as low-damage connection concepts in seismic systems. While several are prequalified or under review for prequalification in the United States, the impact of column design requirements and fuse behavior on seismic performance has not yet been thoroughly investigated. This study analyzed typical steel SMRFs of varying heights (2, 4, 6, and 8 stories) using a prequalified yield-type fuse connection, specifically the Simpson Strong Tie™ (SST) Yield-Link (YL)® connection. Current prequalified design procedures for this connection allow columns to be designed for larger overstrength demands without meeting certain seismic compactness limits. This study investigates the impacts of column design variations (i.e., column overstrength, compactness, and capacity-limited forces) on collapse performance. Nonlinear static pushover and incremental dynamic analyses revealed that designs that considered seismic compactness, even with relaxed overstrength demands, outperformed those with higher overstrength but no compactness requirements, particularly in taller buildings. However, since the shallower column sections for shorter buildings were more likely to meet width-to-thickness limits for highly ductile members, relaxing overstrength requirements could reduce the collapse margin ratios in SST-YL SMRFs. These results indicate that there is potential to consider modified column design requirements for SST-YL connections, offering a cost-effective approach to improving structural resilience without compromising seismic collapse performance.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"222 ","pages":"Article 114565"},"PeriodicalIF":6.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146039062","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":"Influence of curing-induced residual stress on structural and joint strength of magnesium alloy–carbon fiber composite casing","authors":"Yankun Yang ,&nbsp;Kai Yang ,&nbsp;Quan Shi ,&nbsp;Hong Zhang ,&nbsp;Xiangying Hou","doi":"10.1016/j.tws.2026.114605","DOIUrl":"10.1016/j.tws.2026.114605","url":null,"abstract":"<div><div>The residual stress generated during the curing process affects the mechanical properties of composite materials. To obtain the curing-induced residual stress (CRS) distribution in the casing and study its influence on static response under loads, a multi-field coupled analysis model was established. This model first simulates curing process to obtain the CRS distribution in composite part of casing. Subsequently, static analysis is conducted by introducing the CRS as initial stress. The adhesive–mechanical joints in casing are modeled using a cohesive zone model (CZM) and fastener modeling. This method enables the simulation of mechanical behavior of casing under multiaxial loading while accounting for the influence of CRS. The model was applied to analyze the static response of casing and investigate the effects of CRS on structural and joint strength. The damage behavior of adhesive layer was obtained, and the surface strain of composite part was measured experimentally. Due to the superimposition and cancellation effects between CRS and external loads in different zones of the composite part, both location and magnitude of stress concentration in composite part have changed after bearing the loads. Without considering CRS, stress concentration occurs in Zone A of composite part, with a stress level of approximately 175 MPa. When CRS are considered, the stress level in this region decreases to 140 MPa, while the stress level in Zone B increases from 115 MPa to 145 MPa.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"223 ","pages":"Article 114605"},"PeriodicalIF":6.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190379","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 investigation of 6061-T6 aluminium alloy CHS stub columns under transient fire conditions considering intumescent coatings","authors":"Zhongxing Wang ,&nbsp;Yifan Wang ,&nbsp;Lele Zhan ,&nbsp;Shijia He ,&nbsp;Boshan Chen","doi":"10.1016/j.tws.2026.114507","DOIUrl":"10.1016/j.tws.2026.114507","url":null,"abstract":"<div><div>This study investigated the local buckling behaviour of aluminium alloy circular hollow section (CHS) stub columns under transient fire conditions, with a particular focus on the effects of intumescent coating. A total of 18 experimental tests were conducted, including four tests at room temperature, eight under high-temperature transient conditions without fire protection, and six under similar conditions with intumescent coating. Prior to the stub column tests, the material properties of the 6061-T6 aluminium alloy at room temperature were obtained through the tensile coupon tests, and the initial geometric imperfections of the stub columns were measured using a 3D laser scanner. The load-end shortening behaviour, failure modes, critical temperatures, and the effectiveness of intumescent coatings were investigated in this study. The test results revealed a distinct contrast in failure modes: under ambient conditions, all stub column specimens exhibited elephant-foot-type local buckling at the ends, whereas under unprotected, high-temperature transient conditions, local buckling occurred at mid-height. Based on the experimental results, the applicability and accuracy of Chinese Code (T/CECS 756–2020) and European Standard (EN 1999–1–1) (2007) were evaluated, and the results revealed that existing design provisions underestimate the load-bearing capacity of such aluminium alloy stub columns at elevated temperatures. To address this, a preliminary empirical formula based on modified European Standard (EN1993–1–2) (2005) was developed for accurately determining the critical temperature of aluminium alloy stub columns under fire conditions.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"222 ","pages":"Article 114507"},"PeriodicalIF":6.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145981101","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":"Dynamic evolution of wall pressure reflection coefficient and structural response characteristics of stiffened cylindrical shells subjected to underwater explosion loads","authors":"Yuheng Liu ,&nbsp;Kun Zhao ,&nbsp;Zhikai Wang ,&nbsp;Renjie Huang ,&nbsp;Xiongliang Yao ,&nbsp;Naji Ma","doi":"10.1016/j.tws.2026.114485","DOIUrl":"10.1016/j.tws.2026.114485","url":null,"abstract":"<div><div>This study investigates the pressure characteristics of the inner wall surface and the evolution mechanism of the pressure reflection coefficient for stiffened thin-walled cylindrical shell structures subjected to complex fluid-structure interaction phenomena—including wall reflection, diffraction, and interference—under underwater explosion loads at medium interfaces. Based on material strain rate effects, the dynamic evolution mechanism of the wall pressure reflection coefficient is analyzed theoretically. Elastic deformation experiments were conducted to explore how different damage characteristics of the stiffened cylindrical shell structure influence the time-domain features of wall pressure and its reflection coefficient. To further investigate system parameter effects on wall pressure, numerical simulations were performed for cases with plastic small deformation and plastic indentation large deformation damage characteristics. The dynamic evolution laws of the wall pressure reflection coefficient at the explosion point were examined under varying load parameters. A semi-empirical formula for the wall pressure reflection coefficient was developed based on load parameters and structural characteristic parameters, revealing strong correlations between the reflection coefficient and the impact response of the stiffened cylindrical shell structure. The findings demonstrate that increased material strain rate enhances the reflection coefficient. For the studied structure at the explosion point with a detonator radius of 1.77<em>R</em>₀, the reflection coefficient <em>δ</em> ranges from approximately 1.3∼1.4 under small plastic deformation conditions and 1.4∼1.7 under large plastic indentation deformation conditions. Variations in the wall pressure reflection coefficient under different damage characteristics significantly affect the spatial characteristics of the impact response, providing a foundation for damage assessment and anti-impact protection design of stiffened cylindrical shell structures under underwater explosion loads.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"222 ","pages":"Article 114485"},"PeriodicalIF":6.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145981767","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":"Stability criterion and parameter coupling effects of unilateral impact vibration in cantilevered fluid-conveying pipes","authors":"Tianlin Wang ,&nbsp;Feng Xu ,&nbsp;Changqing Guo ,&nbsp;He Liu","doi":"10.1016/j.tws.2026.114498","DOIUrl":"10.1016/j.tws.2026.114498","url":null,"abstract":"<div><div>In complex engineering environments such as marine engineering, mechanical and chemical engineering, and nuclear industry, the fluid-conveying pipe in service may experience parameter coupling impact vibration phenomena direct or spaced base excitation from earthquakes and waves. The strong nonlinear behavior significantly compromises the vibrational stability and operational safety/reliability of pipe systems. Therefore, a dynamic model for analyzing the impact vibration of unilaterally constrained cantilevered fluid-conveying pipes is established under base excitation by utilizing tension-compression anisotropic springs and the Euler-Bernoulli beam theory. Firstly, a novel amplitude stability criterion applicable to evaluating the nonlinear stability of cantilevered fluid-conveying pipes is proposed. Secondly, the results obtained by the new method were compared with experimental results, the simulation results of the high-stiffness spring system, and modal energy analysis, which verified the effectiveness of the amplitude stability criterion. Finally, the impact vibration stability of unilaterally constrained cantilevered pipes under parameter coupling effects is systematically investigated based on amplitude stability criterion and shows that co-existence region of flutter instability and divergence instability may appear and can be influenced by different parameters; the location of constraint can also greatly affect the critical flow velocity.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"222 ","pages":"Article 114498"},"PeriodicalIF":6.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145981764","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":"Tailoring flexural strength and toughness of bio-inspired hybrid carbon/glass fiber laminates by controlling interlayer layup configurations","authors":"Linhai Huang ,&nbsp;Jin Sun ,&nbsp;Diantang Zhang ,&nbsp;Xinchao Gao ,&nbsp;Junpeng Li ,&nbsp;Junhua Zhao","doi":"10.1016/j.tws.2026.114635","DOIUrl":"10.1016/j.tws.2026.114635","url":null,"abstract":"<div><div>Interlayer layup configurations strongly dominate the mechanical properties of hybrid composite laminates. However, the influence of their structural parameters on the microscopic mechanical behavior and failure mechanisms remains unclear. To address this, we design a novel bio-inspired hybrid carbon/glass fiber laminate, where carbon fiber and glass fiber represent the hard and soft phases, respectively. The nonlinear mechanical behavior of 28 different layup types of hybrid carbon/glass fiber laminates is investigated through an integrated approach combining three-point bending tests and finite element analysis (FEA). Real-time monitoring of damage initiation and evolution is achieved using acoustic emission (AE) and digital image correlation (DIC), while a machine learning algorithm decodes AE features to classify damage modes. Corroborated by scanning electron microscopy (SEM), this multi-technique methodology systematically reveals the progressive damage behavior and failure mechanisms of the hybrid composites. Parametric analysis further elucidates the synergistic influence of dispersion degree and hybrid ratio, identifying the [G₃C₃]₂ laminate as the optimal configuration at a dispersion degree of 0.27 and a hybrid ratio of 0.5. Compared to the [C]₁₂ laminate, this design achieves a 32.78% higher flexural strength and a 45.82% greater energy absorption, yielding a superior comprehensive performance index of 0.77. This study establishes a bio-inspired hybrid strategy that provides a foundational framework for designing thin-walled composite structures with tailorable mechanical performance.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"223 ","pages":"Article 114635"},"PeriodicalIF":6.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanical performance of steel tube confined UHPC subjected to blast loading","authors":"Yuzhou Zheng ,&nbsp;Haoze Li ,&nbsp;Xisong Shan ,&nbsp;Hengbo Xiang ,&nbsp;Qin Fang ,&nbsp;Chang Zhou","doi":"10.1016/j.tws.2026.114608","DOIUrl":"10.1016/j.tws.2026.114608","url":null,"abstract":"<div><div>To improve the blast resistance of concrete-filled steel tubular (CFST) and take full advantages of superior compressive strength and energy dissipation capacity of UHPC, the explosion test and numerical simulation of steel tube confined UHPC (STCU) columns were carried out. The dynamic response characters including the overpressure-time history curves, displacement-time history curves, and failure modes of the test specimens were measured. The test results indicated that the STCU columns primarily exhibit overall bending failure under blast loading without significant local buckling or cratering observed. To further investigate the blast response of the STCU columns, the finite element model incorporating S-ALE algorithm for fluid-structure interaction modelling was established and validated by the test data. The influence of slenderness ratio, axial compression ratio, scaled distance, and pre-damage degree on the blast response was systematically analyzed. Results show that peak displacement increases with the slenderness ratio (27.71–103.93) and axial compression ratio (above 0.34), while it decreases as scaled distance increases (0.19–1.86 m/kg^1/3). Pre-damage significantly amplifies the displacement amplification factor (<em>DAFδ</em>) under secondary blast loading when the initial scaled distance <em>Z₁</em> &lt; 0.5 m/kg^1/3. The failure mode transitions from local buckling at very small scaled distances (0.19–0.32 m/kg^1/3) to overall bending at larger distances (0.46 m/kg^1/3). These findings clearly demonstrate how both structural parameters and loading conditions jointly govern the blast resistance and dynamic behavior of STCU columns.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"223 ","pages":"Article 114608"},"PeriodicalIF":6.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191100","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":"Synergistic evolution mechanism of residual stress field and deformation in aero-engine thin-walled blades under service conditions","authors":"Yilong Cao ,&nbsp;Changfeng Yao ,&nbsp;Liang Tan ,&nbsp;Daoxia Wu ,&nbsp;Xu Zou ,&nbsp;Shiqian Xiang ,&nbsp;Wenran Zhou ,&nbsp;Shuaifeng Xue","doi":"10.1016/j.tws.2026.114570","DOIUrl":"10.1016/j.tws.2026.114570","url":null,"abstract":"<div><div>The surface state achieved through surface modification process is inherently unstable, and the evolution of surface integrity during service significantly impacts the performance of aero-engine blades. This study systematically investigated the surface integrity and deformation behavior of aero-engine blades by shot peening at different service stages. Experimental results indicated that the surface integrity of the blades underwent a sudden change within 10³ cycles, followed by a stable evolution phase, exhibiting notable spatiotemporal discreteness. Specifically, distinct evolutionary patterns were observed between the blade root and tip, the back and basin, and along the chord and height directions, leading to differential evolution in position and profile tolerances. Through vibration simulation, it was revealed that the discrete distribution of working stress was the primary cause of the spatiotemporal discreteness in surface integrity evolution. Based on linear elastic theory, the deformation behavior of the blades was shown to follow directional and relative criteria. Furthermore, a deformation prediction model for in-service blades (NS-FEM) was established, which introduces \"net stress\" as the driving load for deformation and avoids the damage to the blades caused by residual stress testing. The relative error of the NS-FEM model in predicting blade position was less than 15%. This study not only enhances the understanding of blade deformation behavior during service but also provides a methodological reference for the non-destructive prediction and online control of blade machining deformation.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"223 ","pages":"Article 114570"},"PeriodicalIF":6.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081145","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 evaluation on the shear performance of grouted bolt connections in steel-CLT and steel-CLBT composite structures","authors":"Jinwei Lu ,&nbsp;Yang Wei ,&nbsp;Hao Du ,&nbsp;Kang Zhao ,&nbsp;Silu Huang ,&nbsp;Jiawei Chen","doi":"10.1016/j.tws.2026.114573","DOIUrl":"10.1016/j.tws.2026.114573","url":null,"abstract":"<div><div>Steel-cross laminated timber (CLT) composite floors have increasingly emerged as an alternative to steel-concrete composite floors due to their sustainability and construction efficiency. In addition, given the superior mechanical properties and resource utilization of cross-laminated bamboo and timber (CLBT), steel-CLBT composite systems hold promise for further enhancing the overall structural performance of steel-timber composite (STC) floors. The composite action of STC systems is governed by the shear performance of their connections. Traditional demountable bolt connections exhibit low stiffness in STC systems. Therefore, this study proposed grouted bolt connections for steel-CLT and steel-CLBT composite structures. Ten sets of push-out specimens were designed to investigate the effects of bolt diameter, bolt strength, grout diameter, and panel type. The test results indicate that steel-CLBT connections failed due to bolt shear, whereas those in the steel-CLT connections exhibited failure modes involving grout crushing, timber crushing, and bolt bending. The grouted bolted connections in the steel-CLBT composite system exhibit significantly higher shear capacity and slip stiffness than those in the steel-CLT composite system (shear capacity increased by 45–70% and slip stiffness increased by 1.8–10 times), albeit with lower ductility. In addition, compared with demountable bolted connections, the grouted bolted connections in the steel-CLBT composite system achieve more than a twofold increase in slip stiffness. Finally, based on the different failure modes, the shear capacity and load-slip behavior of various connections were evaluated and predicted.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"222 ","pages":"Article 114573"},"PeriodicalIF":6.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079336","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}