Thin-Walled Structures最新文献

{"title":"Experimental analysis of the mechanical behavior of steel storage rack base plate upright connections","authors":"Marina Naomi Furukawa,&nbsp;Maximiliano Malite","doi":"10.1016/j.tws.2025.113340","DOIUrl":"10.1016/j.tws.2025.113340","url":null,"abstract":"<div><div>Steel storage racks, typically composed of cold-formed steel profiles, are among the most widely used solutions in the storage industry, offering significant economic and operational advantages. Despite their critical role in frame stability, current rack design specifications lack clear guidelines for considering the influence of semi-rigid base plate upright connections. While standard design recommendations require experimental testing to determine base plate stiffness and strength, several aspects of the standardized test methods require clarification, as they may, in some cases, lead to inaccurate results. This study presents an experimental investigation into the mechanical behavior of steel storage rack base plate upright connections. First, an alternative experimental arrangement is proposed to address limitations in existing standardized methods. Experimental results from eight base plate assemblies under flexural compression forces are analyzed, considering four different axial compression loads. The findings reveal inconsistencies in standardized test specifications and demonstrate the feasibility of the proposed alternative experimental set-up. Results also indicate that axial compression loads significantly affect the stiffness and moment capacity of rack base plate upright connections, with moment-rotation curves confirming their semi-rigid behavior.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"214 ","pages":"Article 113340"},"PeriodicalIF":5.7,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887693","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":"Interval-based scale-span topology optimization considering reliable manufacturing limits via the parameterized level set method and image recognition techniques","authors":"Zeshang Li ,&nbsp;Lei Wang ,&nbsp;Kaixuan Gu ,&nbsp;Yaru Liu","doi":"10.1016/j.tws.2025.113353","DOIUrl":"10.1016/j.tws.2025.113353","url":null,"abstract":"<div><div>With the continuous development of additive manufacturing technology, designing materials and structures with diverse functions and complex configurations to meet special needs has become a hot topic. However, the various manufacturing limits result in deviations between the design results and the actual results. This paper proposes an interval-based scale-span topology optimization method considering reliable manufacturing limits via the parameterized level set method and image recognition techniques. Firstly, this paper describes the boundaries of topology configurations based on the parameterized level set method. Then, based on the image recognition technology, explicit expression of structural boundaries is achieved, and various geometric features are further quantified and controlled based on the recognition results. Considering the uncertainty effects of structural size and size constraints, a reliability-based topology optimization design has been achieved. Design optimization has been carried out for metamaterial problems, mechanical problems, and thermal problems of multiscale structures. Finally, numerical validation and manufacturing are carried out on the design results, which demonstrates the effectiveness of the proposed method.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"214 ","pages":"Article 113353"},"PeriodicalIF":5.7,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143895560","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":"On-orbit thermal-mechanical coupling performance analysis of a deployed hoop-column antenna","authors":"Wei Xu,&nbsp;Hao Zhu,&nbsp;Jiafeng Li","doi":"10.1016/j.tws.2025.113312","DOIUrl":"10.1016/j.tws.2025.113312","url":null,"abstract":"<div><div>Deployable hoop-column antennas have been employed extensively in communication satellites over the past few decades. The antenna may subject to significant deformation or even heat-induced vibration during on-orbit operation as a result of solar radiation shocks, which could potentially impact its normal functionality. In this paper, the finite element theory and Fourier thermal element method are combined to study the thermal–structural response of the antenna under solar thermal shock in a real space thermal environment. According to the antenna’s orbital position and orientation relative to the Sun and Earth’s, a novel spatial heat flux analysis model is first established to calculate the real solar heat radiation flux on local positions of the antenna considering the Earth’s shadow effect and reflector’s light shading effect. The coupled thermal–mechanical coupling analysis model which incorporates the cable pre-tension is then established and validated by comparison with the ground thermal radiation impact test. The on-orbit thermal–mechanical dynamic response of the antenna is examined during satellite operation in two types of orbits (geostationary orbit and general elliptical orbit). The findings indicate that the light-shadow effect intensifies the temperature gradient of the antenna and influences the thermal deformation of the antenna. However, due to the structural stability of the hoop-column antenna, minimal thermal vibration of the antenna is discerned.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"214 ","pages":"Article 113312"},"PeriodicalIF":5.7,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143879403","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":"Hardening evolution and ductile fracture initiation properties in three orientations of S700MC ultra-high-strength structural steel","authors":"Mingxu Shang ,&nbsp;Hua Yang","doi":"10.1016/j.tws.2025.113375","DOIUrl":"10.1016/j.tws.2025.113375","url":null,"abstract":"<div><div>Ultra-high-strength structural steels have gained more attention in the field of civil engineering due to their extremely high strength-to-weight ratio. Due to the practical need for assessing the cold bendability of S700MC ultra-high-strength structural steel by means of plasticity and ductile fracture model, a series of notched tensile specimens highly correlated with the stress states of uniaxial tension and plane strain was tested in this study. Additionally, in our pre-investigation, it was found that the hardening and ductile fracture properties of S700MC steel are highly sensitive to the orientation. Thus, three typical orientations, including rolling direction (0°), diagonal direction (45°) and transverse direction (90°), are incorporated in the testing programme considering the standard operation of actual processing. Based on the experimental flow curves along three orientations, an updated Hill48 plasticity model coupled with the effect of hardening evolution was introduced, calibrated, and subsequently applied to the three-point bending test and the tensile tests of stress-state-dependent notched specimens. With good agreement between experimental and simulated results, the loading paths, defined as a function of the equivalent plastic strain in terms of the stress triaxiality and the Lode angle parameter, are extracted from the finite element models along different orientations. Under the framework of the partially coupled ductile fracture model, three classic models including the Hosford-Coulomb model, the modified Mohr-Coulomb model, and the Lou-Huh model, were calibrated and validated in three orientations of the metallic material. Finally, aiming at assessing the cold bendability in three typical orientations of S700MC steel sheet, a parametric analysis, regarding the types of fracture locus and the ratio of punch radius to thickness, was conducted with the built-up constitutive models, providing a basis for the manufacturing of S700MC steel products.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"214 ","pages":"Article 113375"},"PeriodicalIF":5.7,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143895557","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":"Seismic performance of prefabricated connections for partially encased composite beam to CFST column","authors":"Yuexi He ,&nbsp;Yan-Gang Zhao ,&nbsp;Yu Bai ,&nbsp;Siqi Lin","doi":"10.1016/j.tws.2025.113378","DOIUrl":"10.1016/j.tws.2025.113378","url":null,"abstract":"<div><div>Partially encased composite (PEC) beam and concrete-filled steel tube (CFST) column may take advantages of both steel and concrete for high-rise and long-span applications. However, understanding on the seismic performance of such PEC beam-to-CFST column joints is still quite limited, leading to a lack of relevant moment resistance design methods. Two experimental scenarios and nine finite element (FE) models subjected to cyclic loading were developed in this study to understand their moment-rotation responses. The main results showed that the initial rotational stiffness, plastic moment, and ultimate moment generally decreased with the reduction in bolt diameter and end-plate thickness. The middle rows of bolts had a minimal impact on the initial rotational stiffness and bearing capacity of the connections, while the edge rows of bolts and the stiffeners presented more significant effects. Based on the experimental and FE results, a design method was developed to estimate the moment resistance of the PEC beam-to-CFST column joints. The resulting moment resistance was compared with the plastic moments from the experiments and FE analyses, with 97 % in average and 0.06 in deviation.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"214 ","pages":"Article 113378"},"PeriodicalIF":5.7,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892398","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":"A quasi-zero-stiffness metastructure for concurrent low-frequency vibration attenuation and energy harvesting","authors":"Yaoqiang Shu ,&nbsp;Kai Wang ,&nbsp;Tingting Chen ,&nbsp;Hongbing Pan ,&nbsp;Yiping Deng ,&nbsp;Hanfeng Yin ,&nbsp;Jiaxi Zhou","doi":"10.1016/j.tws.2025.113371","DOIUrl":"10.1016/j.tws.2025.113371","url":null,"abstract":"<div><div>Metastructures have been extensively studied for vibration attenuation, wave manipulation, and energy conversion. However, achieving simultaneous vibration attenuation and energy harvesting in low-frequency and ultra-low-frequency regimes remains challenging due to limitations in conventional designs. This study proposes a novel dual-functional quasi-zero-stiffness (QZS) metastructure that integrates low-frequency bandgap generation and piezoelectric energy conversion using polyvinylidene fluoride (PVDF) films. The metastructure is optimized for low-frequency, low- amplitude conditions typical in engineering applications. A nonlinear electromechanical coupling model is developed to describe its dynamic and electrical behaviors, with governing equations solved numerically using the fourth-order Runge-Kutta method and validated via finite element simulations. Parametric studies investigate the influence of key design parameters on vibration attenuation and energy harvesting performance. Results demonstrate that the QZS metastructure effectively suppresses low-frequency vibrations while achieving efficient energy conversion, leveraging its unique combination of bandgap formation and piezoelectric mechanisms. This work provides valuable insights into the development of advanced metastructures for low-frequency vibration control and energy harvesting in practical applications.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"214 ","pages":"Article 113371"},"PeriodicalIF":5.7,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143895558","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":"Energy absorption behaviors of trapezoid origami boxes with curved-creases","authors":"Chenhao Teng,&nbsp;Zhichao Cai,&nbsp;Zhibo Song,&nbsp;Wenlong Lu,&nbsp;Jiayu Chen,&nbsp;Caihua Zhou,&nbsp;Peng Hao","doi":"10.1016/j.tws.2025.113355","DOIUrl":"10.1016/j.tws.2025.113355","url":null,"abstract":"<div><div>Compared with conventional square crash boxes, origami crash boxes demonstrate superior potential for widespread application because they can generate several times as many traveling plastic hinge lines (TPHL) as conventional ones, increase the plastic deformation area of the crash box, and greatly improve the energy absorption performance. However, for origami crash boxes, the increase in the number of TPHLs restricts their movement range. Consequently, it becomes difficult for ductile deformations with high energy absorption expressiveness to occur within the origami crash boxes, making it challenging to further enhance the energy absorption performance. Therefore, an innovative curved-crease design method is proposed in this paper. Due to the effect of the curved crease design, the curved crease can lead origami creases to change into TPHLs at the position of maximum curvature and produce a larger ductile deformation area. Through deformation mechanism analysis, compression experiments, numerical simulations, and theoretical analysis of trapezoidal origami crash boxes with curved-creases (TCB-<em>ρ</em>), it can be verified that the curved-crease design not only guides the crash box to generate multiple traveling plastic hinge lines but also further expands the in-plane ductile deformation. Moreover, multiple numerical simulation results indicate that the curved-crease design can decrease the <em>F_max</em>, enhance the <em>F_ave</em>, and ensure a stable energy absorption process in origami crash boxes. The curved-crease <em>ρ</em> and dihedral angle <em>θ</em> of the TCB-<em>ρ</em> have a significant effect on crashworthiness.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"214 ","pages":"Article 113355"},"PeriodicalIF":5.7,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892349","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":"Mechanism of ultrasonic cutting aramid honeycomb using disc cutters with different blade shapes","authors":"Jialin Guo,&nbsp;Zhigang Dong,&nbsp;Mingye Wang,&nbsp;Heng Luo,&nbsp;Yidan Wang,&nbsp;Renke Kang,&nbsp;Jiansong Sun","doi":"10.1016/j.tws.2025.113370","DOIUrl":"10.1016/j.tws.2025.113370","url":null,"abstract":"<div><div>Aramid honeycomb (AH), as a thin-wall structural material, with its excellent properties is gaining popularity in sandwich structures in aerospace, etc. Ultrasonic cutting (UC) using disc cutters (DCs) is an innovative technology for processing honeycomb materials. Multi-tooth disc cutter (MTDC) is a novel cutter with revolutionary structure. However, the tool-material contact state is complicated by the introduction of ultrasonic vibration (UV) and variations of tool structure, and the cutting mechanism is not clarified. To address the issue, the finite element method (FEM) was adopted and multi-scale FE models were formulated, including a model of micro-region UC to investigate the mechanism of the cutting edge interacting with the cell wall, and a model of UC porous honeycomb to explore cutting forces and the machining quality with different blade shapes and UC parameters. Cutting simulations and experiments were performed. It was found that the cutting force of MTDC was significantly lower than that of the DC owing to the intermittent cutting effect of the teeth, and the stress concentration at the tool tip could reduce the deformation of the cell wall. The machined surface of MTDC was predominantly fiber pull-out, whereas the DC were predominantly burrs, but more refined. Ultrasonic amplitude (UA) was the most significant for machining quality, and good machining quality can be obtained when the UA is 20 µm. But the effects on machining quality of spindle speed and feed rate were not significant. Additionally, under different cutting parameters, the cutting force of MTDC in the feed direction and in the axial direction were reduced by an average 63.4 % and 76.9 % respectively compared to that of the DC. This provides theoretical guidance for the design of cutting processes for two different tools and the optimization of the structure of MTDC.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"214 ","pages":"Article 113370"},"PeriodicalIF":5.7,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143879402","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":"Shear strength of CFS shear walls with screw-rivet hybrid connections","authors":"Zhiqiang Xie ,&nbsp;Ying Fan ,&nbsp;Zengzhi Qian ,&nbsp;Shi Zhang ,&nbsp;Ye Bi ,&nbsp;Hongwei Fang ,&nbsp;Daxing Zhou ,&nbsp;Xiyang Lei","doi":"10.1016/j.tws.2025.113289","DOIUrl":"10.1016/j.tws.2025.113289","url":null,"abstract":"<div><div>Numerous studies have demonstrated that the shear performance of cold-formed steel (CFS) shear walls is primarily influenced by the connection between the sheet sheathing and steel frame. The main connection type in CFS structures is self-drilling screws (SDS), which have high deformation capacity but low strength. Self-piercing rivets (SPR) have been found to improve the shear strength of CFS shear walls, but their deformation capacity is limited. Therefore, this paper presents a novel CFS shear wall with screw-rivet (SR) hybrid connections designed to enhance the shear performance of the wall by incorporating the properties and characteristics of both connection types. The influence of fastener arrangement on failure modes of the shear wall was studied and a hybrid connection type with better shear performance was proposed. Experimental investigation revealed that the shear strength of CFS shear walls with SR connections was primarily provided by the sheet sheathing through the diagonal tension field. However, the main failure mode was the failure of SR connections within the tension field. In view of this, the shear behaviour of SR connections was studied further. Shear tests were conducted on total of 42 specimens with two types of sheet combinations to assess the effects of fastener arrangement and number on shear performance and failure mechanisms. A calculation method based on the Group Effect was proposed for determining the shear strength of SR connections. Based on this, a calculation method for the shear strength of a CFS shear wall with SR connections combined with the effective strip method was proposed. The results indicated that the primary failure modes of SR connections were a combination of screw tilting and the rivet tail being pulled out from the lower sheet, and the bearing failure of the upper sheet. The sheet thickness combination was the main factor affecting the failure mode. Considering the Group Effect meant that the calculation method for the shear strength of SR connections was extremely accurate. Thus, SR connections can effectively improve the shear strength and deformation of a CFS shear wall compared to both a shear wall with SDS and a shear wall connected by SPR. The superior shear performance was observed in a shear wall in which screws were added continuously. The proposed calculation method for the shear strength of a CFS shear wall with SR connections was highly accurate, with an error of &lt;5 %. A design example is presented to illustrate this.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"214 ","pages":"Article 113289"},"PeriodicalIF":5.7,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892400","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":"Blast-resistance performance and probabilistic vulnerability assessment of steel box arch ribs subjected to contact explosions","authors":"Yulin Shan ,&nbsp;Zhouhong Zong ,&nbsp;Minghong Li ,&nbsp;Lu Liu ,&nbsp;Shunyin Wan","doi":"10.1016/j.tws.2025.113363","DOIUrl":"10.1016/j.tws.2025.113363","url":null,"abstract":"<div><div>To evaluate the blast resistance and vulnerability of steel box arch ribs under contact explosions, explosive and carrying capacity tests were conducted. A validated three-stage finite element model simulated the blast, free vibration, and residual carrying capacity stages. Multi-parameter analysis revealed that explosive mass, location, and rise-span ratio significantly influenced stiffness and carrying capacity damage, while preload had minimal impact. Explosions within the span range of L/6 to 5L/12 caused the most severe damage, and higher rise-span ratios (1/4) resulted in greater structural damage, suggesting an optimal range of 1/6 to 1/5 for improved stability. Damage levels were classified as slight, moderate, severe, or collapse, based on stiffness and capacity thresholds of 0.1, 0.3, and 0.5. Accounting for uncertainty, empirical formulas for damage levels were proposed, along with vulnerability curves for single and combined damage indices. The results revealed that, compared to single damage indices, blast vulnerability curves based on combined indices integrating stiffness and carrying capacity damage provide a more comprehensive assessment of steel box arch rib damage, particularly in terms of deformation and carrying capacity performance. This study provides key insights for improving the design and safety of steel box arch ribs.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"214 ","pages":"Article 113363"},"PeriodicalIF":5.7,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143879401","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}