Thin-Walled Structures最新文献

{"title":"Determination of residual stress in hybrid laser-arc welded U-rib-to-deck joints by thermo-metallurgical-mechanical simulation and neutron diffraction","authors":"Yuantai Li ,&nbsp;Shaoning Geng ,&nbsp;Jian Li ,&nbsp;Zhijian Fan ,&nbsp;Chu Han ,&nbsp;Jun Jin ,&nbsp;Ping Jiang","doi":"10.1016/j.tws.2024.112755","DOIUrl":"10.1016/j.tws.2024.112755","url":null,"abstract":"<div><div>Welding residual stress is crucial to the fatigue performance and reliability of U-rib-to-deck joints, and its accurate measurement and control remains challenging and lacking an effective approach. In this paper, a thermo-metallurgical-mechanical finite element model considering solid-state phase transformation was developed to investigated the residual stress states of U-rib-to-deck joints fabricated using hybrid laser-arc welding technique. Neutron diffraction testing was conducted to determine the residual stress distribution in three orthogonal directions to validate the model. The results showed that solid-state phase transformation involving changes in mixed phase properties and transformation strain significantly influenced the residual stress in hybrid laser-arc welded U-rib-to-deck joints. The low yield strength property of the supercooled austenite and the volumetric expansion of the bainite transformation strain are crucial for residual stress reduction. A reasonable S-shaped agreement trend was observed between residual stress simulation and neutron diffraction data along the potential crack propagated path. Thermo-metallurgical-mechanical modeling helps to control welding residual stress fields via simulation methods, which is crucial to consider solid-state phase transformation. These findings provide support for assessing the fatigue performance of U-rib structures using hybrid laser-arc welding.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"208 ","pages":"Article 112755"},"PeriodicalIF":5.7,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757196","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 behavior of reinforced Al2O3 lattice structures: Effects of structural parameters from experiments and simulations","authors":"Ke Zhong ,&nbsp;Zhiguo Wang ,&nbsp;Jin Cui ,&nbsp;Xuehua Yu ,&nbsp;Mingtao Zhang ,&nbsp;Zhenfeng He ,&nbsp;Yuhui Zhao ,&nbsp;Jibin Zhao","doi":"10.1016/j.tws.2024.112753","DOIUrl":"10.1016/j.tws.2024.112753","url":null,"abstract":"<div><div>The pressure hull is one of the core components of autonomous underwater vehicles (AUVs), necessitating a new structural material with improved mechanical and lightweight properties. For this purpose, a novel type of reinforced lattice structure (RLS) that integrates Al₂O₃ lattice structures (ALSs) with phenol-formaldehyde (PF) resin was designed and fabricated via stereolithography (SL)-based additive manufacturing and infiltration processes. The responses of the RLSs with different structural configurations, relative densities, and unit cell sizes under compressive loading were systematically characterized. Additionally, numerical simulations were conducted to further predict and study the mechanical behavior of the RLSs using Johnson-Holmquist-II (JH-2) model. The results revealed that the mechanical properties of the RLSs from superior to inferior were simple cubic (SC), body-centered cubic (BCC), Gyroid, octet truss (Oct), and SchwarzP (Sch). As the relative density and the unit cell size increased, the mechanical properties of the RLSs increased. Furthermore, the results of the numerical simulations closely aligned with the experimental results, which provided an in-depth analysis of internal damage and crack propagation in the RLSs under compression. A comparison of the mechanical properties also demonstrated that RLSs exhibit superior compressive strength and energy absorption performance than traditional ALSs do. After this investigation, this type of RLS is anticipated to facilitate lightweighting of AUVs, advancing the development of deep-sea scientific research.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"207 ","pages":"Article 112753"},"PeriodicalIF":5.7,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757443","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":"Parameter optimisation of piezoelectric vibration absorber in composite cylindrical shells: A multi-modal approach to mitigate stochastic vibration","authors":"Yucai Zhong ,&nbsp;Rihuan Yu ,&nbsp;Kai Zhou ,&nbsp;Zhenguo Zhang","doi":"10.1016/j.tws.2024.112713","DOIUrl":"10.1016/j.tws.2024.112713","url":null,"abstract":"<div><div>This paper investigates the stochastic vibration mitigation of composite cylindrical shells using multi-modal piezoelectric vibration absorbers (PVAs). A novel semi-analytical method is proposed to analyse the stochastic vibration characteristics of composite cylindrical shells equipped with PVAs. The vibration behaviour under stochastic excitations is determined using the modified Ritz method and the pseudo excitation method (PEM). Compared to the finite element method (FEM), the proposed model greatly enhances efficiency by eliminating the need for repeated modelling and meshing, thereby facilitating the optimisation of PVAs. The effects of piezoelectric patch layout and circuit parameters on PVA performance are examined in detail using the proposed electro-mechanical model. Additionally, a multi-modal PVA design procedure, combining the semi-analytical model with a surrogate model-based optimisation algorithm, is presented. The superior stochastic vibration suppression performance of the multi-modal PVA is demonstrated by comparing the dynamic responses of the composite cylindrical shell without PVA, with single-modal PVA, and with multi-modal PVA. The proposed optimisation procedure offers a valuable approach for the design of multi-modal PVAs for stochastic vibration control of cylindrical structures.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"207 ","pages":"Article 112713"},"PeriodicalIF":5.7,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757437","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 and numerical study of hysteresis behavior of innovative hybrid steel-timber shear wall system","authors":"Mojtaba Gorji Azandariani ,&nbsp;Ali Parvari ,&nbsp;Arvin Yaghmouri ,&nbsp;Mehdi Vajdian","doi":"10.1016/j.tws.2024.112743","DOIUrl":"10.1016/j.tws.2024.112743","url":null,"abstract":"<div><div>This research presents hybrid steel-timber shear walls (HSTSWs) as an environmentally friendly and structurally efficient system. The HSTSW system provides quick and easy interchangeability of the timber components, making it adjustable and adaptable to different design needs throughout the building's lifecycle. Additionally, the incorporation of timber elements into the steel frame contributes to lateral resistance while offering an eco-friendly alternative to materials such as steel and concrete. This research includes experimental studies and numerical simulations using finite element analysis to investigate and comprehensively compare the hysteresis behavior of HSTSW and SPSW. The hysteresis behavior, ultimate load, failure modes, energy dissipation mechanisms, ultimate displacement, weight-related characteristics, and efficiency of load-carrying capacity are analyzed for both HSTSW and SPSW specimens. Comparative results with SPSW indicate that HSTSW exhibit a slightly higher ultimate load-carrying capacity and significantly greater ultimate deformation capacity. The cyclic behavior and failure modes of both systems are detailed, emphasizing the trade-off between strength and ductility in HSTSWs. Stiffness, ductility, absorbed energy, and equivalent viscous damping ratio are assessed, revealing that HSTSW absorb more energy with higher specific absorbed energy and exhibit comparable damping behavior to SPSW. Additionally, numerical modeling is employed to simulate the response of SPSW and HSTSW, and a validation process is conducted to compare numerical and experimental outcomes.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"208 ","pages":"Article 112743"},"PeriodicalIF":5.7,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757195","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":"Macro/micro failure mechanism of transparent armour subjected to multiple impacts of 7.62mm bullets","authors":"Yubo Gao ,&nbsp;Liutong Shi ,&nbsp;Zhihao Li ,&nbsp;Zhe Jia ,&nbsp;Yanxin Ge","doi":"10.1016/j.tws.2024.112754","DOIUrl":"10.1016/j.tws.2024.112754","url":null,"abstract":"<div><div>Transparent armor is widely used in military and civilian impact protection fields due to its excellent light transmittance and ballistic performance. This work focused on the macro/micro failure mechanisms of transparent armor for vehicles subjected to multiple impacts. Results showed that the penetration depth after the first impact by a 7.62 mm bullet is about 14 mm, regardless of the impact position. Based on the cavity expansion theory, the penetration depth under multiple projectile impacts was predicted, relating it to the distance between the impact points, the distance from the projectile hole to the edge of the target plate, and the damage radius caused by the first impact. In the thickness direction, observation of the glass layer damage modes revealed that the interlayer adhesive could hinder the propagation of vertical cracks between different glass layers, with delamination primarily caused by insufficient shear strength. In the in-plane direction, the size of the fractured glass gradually increases outward from the impact point because circumferential cracks can prevent the propagation of radial cracks. Finally, the micro failure analysis of glass fragments showed that the radial cracks are dominated by numerous irregular microcracks and river-like textures, while the circumferential cracks consist of the mirror region, mist region, hackle region, and river-like texture region.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"207 ","pages":"Article 112754"},"PeriodicalIF":5.7,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757436","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 cyclic behavior of cold-formed steel bolted connection frames considering local buckling","authors":"Seungwook Seok ,&nbsp;TaeSoo Kim","doi":"10.1016/j.tws.2024.112707","DOIUrl":"10.1016/j.tws.2024.112707","url":null,"abstract":"<div><div>Cold-formed steel (CFS) structures are increasingly popular in the construction industry due to their high strength-to-weight ratio, ease of fabrication, and cost-effectiveness. This study focuses on the development of a detailed mathematical model to accurately simulate the cyclic behavior of CFS moment-resisting bolted connection frames, particularly considering the local buckling of connected frames. Bolted joints are preferred in thin-walled CFS structures over welded joints due to their ease of installation and adaptability in seismic design, relying on slip and bearing mechanisms of bolts to accommodate inelastic deformations and dissipate energy during seismic events. The proposed model incorporates these mechanisms and validates them against experimental data and refined finite element analyses. Significant findings highlight the importance of the balanced number and arrangement of bolts in preventing excessive bolt slip and premature buckling. This research provides a robust analytical tool for optimizing bolted joint designs in CFS bolted connection frames, contributing to safer and more resilient CFS structures in seismic regions. The model’s computational efficiency further enhances its practicality for engineers and researchers.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"207 ","pages":"Article 112707"},"PeriodicalIF":5.7,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757533","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":"Modeling of the tensioned membrane backed by a variable-shape cavity and research on acoustic characteristics","authors":"Zhehao Sheng ,&nbsp;Deyu Kong ,&nbsp;Yongfeng Zhang ,&nbsp;Ziyuan Zhu ,&nbsp;Gang Wang ,&nbsp;Yan Yan","doi":"10.1016/j.tws.2024.112744","DOIUrl":"10.1016/j.tws.2024.112744","url":null,"abstract":"<div><div>The drum-type muffler comprises a rigid back cavity and a tensioned membrane, which utilizes the radiation sound field of a membrane and the superposition effect of the enclosed sound field to achieve noise reduction. However, most previous studies have been focused on idealized models, with little research on the sound radiation power from a membrane concerning a variable-shape back cavity. This article aims to establish a membrane vibration-acoustic model and investigate the impact of irregular shape and pre-tension conditions on the radiated sound energy. The microunits on the surface of the membrane and the pressure of the sound field are represented as cosine Fourier series. The variable-shape cavity is converted into a normal one by employing the coordinate transformation method. The analytical model of the coupling structure composed by a membrane and the enclosed sound fields is developed based on the energy principle. The acoustic and vibration characteristics of the membrane are solved based on the Rayleigh integral equation. This study also considers the difference in sound insulation performance between the thin plate and the membrane. The analytical results are compared with Finite Element Analysis (FEM) to verify the correctness of the theoretical model. In addition, based on the LMS Simcenter measurement system, experiments are designed to predict the sound pressure on both sides of the membrane. The test results closely correspond with the theoretical calculation results, which confirms the practicality of the theoretical approach.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"207 ","pages":"Article 112744"},"PeriodicalIF":5.7,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757438","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":"The calculation and analysis of expansion-fracture process of metal cylindrical shells under inner explosive loading based on strain rate effect","authors":"Jinyi Du ,&nbsp;Lei Guo ,&nbsp;Jian Pan ,&nbsp;Gang Wang ,&nbsp;Chuanting Wang ,&nbsp;Yuan He ,&nbsp;Yong He","doi":"10.1016/j.tws.2024.112748","DOIUrl":"10.1016/j.tws.2024.112748","url":null,"abstract":"<div><div>The analysis and prediction of expansion-fracture process are the core issues in blast warhead research. This study proposes a theoretical model to calculate the expansion-fracture process of the shells, and the theoretical model is verified and corrected through experimental data in literature, then the model accurately predict the fracture state which is difficult to directly observe. Based on that, this study provides a theoretical explanation for the Ivanov plastic peak from a new perspective. Furthermore, an empirical formula of the fracture time of shells is derived, which related to strain rate. Using the theoretical model in this study, a detailed parametric analysis is conducted to study the strain rate effect of shells. It is found that the appropriate strain rate range can efficiently drive the shell to expand, and the appropriate outer layer shell can efficiently enhance the power of multi-layer warheads. The combination of 45 steel with 2024 aluminium and Y-925 tungsten has good enhancement.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"207 ","pages":"Article 112748"},"PeriodicalIF":5.7,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757435","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":"Snap-through mechanism of a thin beam confined in a curved constraint","authors":"Pengfei Yang ,&nbsp;Xuefeng Li ,&nbsp;Shiwei Xin ,&nbsp;Yuqing Mao ,&nbsp;Luyu Gao ,&nbsp;Fei Dang","doi":"10.1016/j.tws.2024.112745","DOIUrl":"10.1016/j.tws.2024.112745","url":null,"abstract":"<div><div>In this work, a novel snap-through mechanism of a thin beam confined in a curved constraint and driven by local loading curvature is investigated. The movable boundaries of the buckled thin beam enable it to output snap-through rotation at a lower energy input than the double-clamped beam structure. A theory is proposed to reveal the snap-through mechanism of the proposed structure based on the principle of minimum potential energy and saddle-node bifurcation, which uncovers the influences of loading positions, length ratio and constraint radius on the critical loading. Both theoretical and experimental results show that the large loading position and small constraint radius correspond to a large critical loading, while the length ratio hardly affects the critical loading. In addition, an experimental device is designed to output linear displacement based on the proposed snap-through mechanism. Due to lower energy input and snap-through response characteristics, the proposed bistable mechanism exhibits great prospects in energy harvesters, actuators, motors, pumps and robots.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"207 ","pages":"Article 112745"},"PeriodicalIF":5.7,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757445","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":"Microstructure, mechanical properties and cross-sectional behaviour of additively manufactured stainless steel cylindrical shells","authors":"Ruizhi Zhang ,&nbsp;Mohsen Amraei ,&nbsp;Heidi Piili ,&nbsp;Leroy Gardner","doi":"10.1016/j.tws.2024.112750","DOIUrl":"10.1016/j.tws.2024.112750","url":null,"abstract":"<div><div>Powder bed fusion is a rapidly developing method of metal additive manufacturing that offers an unprecedented ability to manufacture complex and flexible components with high accuracy. Stainless steel is a high value material that particularly lends itself to the emerging opportunities offered by metal additive manufacturing. There is, however, limited information related to the microstructure, mechanical properties and structural performance of thin-walled stainless steel elements additively manufactured by powder bed fusion; this is addressed in the present study in the context of thin-walled circular shells, which are investigated through a series of physical experiments and numerical simulations. The experimental programme consisted of material coupon tests, microstructural characterisation, geometric measurements and axial compression tests on stainless steel thin-walled cylindrical shells with large diameter-to-thickness (<em>D</em>/<em>t</em>) ratios produced by powder bed fusion. Advanced measurement techniques—3D-laser scanning and digital image correlation, were utilised to capture the geometric properties prior to testing and the distribution and development of the deformations and strains during testing, respectively. The measured geometric imperfections in the shells were such that most specimens met the Class A fabrication quality requirements set out in EC3-1-6; all tested shells buckled below their yield loads in an asymmetric chequerboard pattern, showing significant sensitivity to local imperfections. In parallel with the experimental investigation, a numerical modelling programme was carried out, aimed at first replicating the compression tests and then extending the current test data pool over a wider range of slenderness values. The experimental and numerical data were analysed and employed to assess the applicability of existing design methods for conventionally formed tubular sections to those manufactured by powder bed fusion. EC3-1-6 was found to give consistent and safe-sided buckling resistance predictions for the studied stainless steel cylindrical shells under axial compression.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"208 ","pages":"Article 112750"},"PeriodicalIF":5.7,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}