Thin-Walled Structures最新文献

{"title":"High-velocity impact behavior of inert and reactive PELE projectiles against thin-walled targets","authors":"Wei Xian Lim ,&nbsp;Siyan Deng ,&nbsp;Qingjun Yu ,&nbsp;Wei Liang Goh ,&nbsp;Hay Yee Serene Chan ,&nbsp;Huey Hoon Hng","doi":"10.1016/j.tws.2025.113728","DOIUrl":"10.1016/j.tws.2025.113728","url":null,"abstract":"<div><div>Reactive projectiles offer enhanced lateral effects via impact-induced energy release, yet existing modeling approaches often lack the ability to accurately capture the complex interplay between mechanical fragmentation and chemical reactions. This work addresses this limitation by exploring the fragmentation dynamics, lateral dispersion, and reactivity of Penetrators with Enhanced Lateral Effects (PELE) containing inert (PTFE) and novel reactive fillings (BDO-FP/CuO/Al and Viton/Al), impacting thin-walled metallic plates at an initial velocity around 1000 m/s. Experiments employed a two-stage helium gas gun with high-speed cameras and flash X-ray imaging to visualize projectile–target interactions and perforation characteristics. Numerical simulations were conducted using Smoothed Particle Hydrodynamics (SPH) in LS-DYNA, incorporating Johnson–Cook constitutive laws, stochastic fracture models, and Ignition and Growth Reactive Model equations of state derived from <em>Ab Initio</em> molecular dynamics (AIMD) and computational fluid dynamics (CFD). Experimental results revealed that reactive fillings, particularly Viton/Al, exhibited significantly higher reaction intensity, characterized by intense combustion flashes and broader fragment dispersion with more severe perforation damage compared to inert PTFE. SPH simulations effectively reproduced these phenomena, capturing axial velocity attenuation and radial fragmentation, although minor discrepancies remained in dispersion magnitudes and local perforation geometries. Product species analysis showed that Viton/Al rapidly decomposes into abundant gas-phase species, driving pressure buildup and accelerating combustion. BDO-FP/CuO/Al exhibited delayed, multi-stage decomposition with larger fragments and slower energy release. By integrating experiments with SPH, AIMD, and CFD modeling techniques, this work provides comprehensive insights into PELE behaviors and facilitates the optimization of reactive material formulations for enhanced lateral damage effects.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"216 ","pages":"Article 113728"},"PeriodicalIF":5.7,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716126","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":"Physics-informed KAN-coupled FEM for deformation analysis of complex shells","authors":"Min-Zhan Huang ,&nbsp;Yu-Xiang Peng ,&nbsp;Zhen-Tao Jiang ,&nbsp;Peng-Nan Sun ,&nbsp;Cai-Xia Jiang","doi":"10.1016/j.tws.2025.113725","DOIUrl":"10.1016/j.tws.2025.113725","url":null,"abstract":"<div><div>This study addresses the challenges of weak geometric adaptability and low computational accuracy in Physics-Informed Neural Networks (PINNs) for predicting static mechanical responses of complex shell structures. Despite growing applications of PINNs in shell static analysis, their use for complex geometries like stiffened shells remains hindered by limited network capacity, subpar training accuracy, and ineffective physical constraint enforcement. No reliable PINN solutions currently exist for such complex geometries. We propose an innovative computational framework that deeply integrates the Finite Element Method (FEM) with Physics-Informed Kolmogorov–Arnold Networks (PIKANs). The framework spatially discretizes shell structures using FEM, solves shell governing equations at each grid node, and establishes the neural network’s loss function based on these equations. Building on this foundation, an improved High-Order ReLU-KAN (HRKAN) is employed to construct the FEM-PIKAN computational model, which innovatively introduces sigmoid activation functions at the hidden layer inputs to significantly enhance the network’s nonlinear mapping capability. To validate the method’s effectiveness, systematic studies are conducted on four typical shell structures — flat plate, cylindrical shell, stiffened plate, and stiffened cylindrical shell — under body force, surface pressure, and concentrated loads. Additionally, the static response of a simplified submarine pressure hull subjected to complex loading scenarios was predicted. The results demonstrate that the proposed FEM-PIKAN method accurately predicts the static responses of various complex shell structures, providing a new paradigm for efficient and high-precision analysis of such structures. The source code is available at <span><span>https://github.com/whatuphmz/FEM-PIKAN</span><svg><path></path></svg></span>.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"216 ","pages":"Article 113725"},"PeriodicalIF":5.7,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686587","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":"Numerical and experimental analyses of the coupled impact of corrosion and cracks on the ultimate strength of stiffened plates","authors":"Krzysztof Woloszyk ,&nbsp;Alicja Bera ,&nbsp;Jakub Kowalski ,&nbsp;Emil Roch ,&nbsp;Yordan Garbatov","doi":"10.1016/j.tws.2025.113711","DOIUrl":"10.1016/j.tws.2025.113711","url":null,"abstract":"<div><div>The objective of this study was to analyse how corrosion and cracks acting simultaneously affect the compressive strength of stiffened plates used in ship structures. The analysis covered experiments and numerical simulations. It was found that corrosion and cracks progressing together can significantly reduce the strength of these plates, especially slender ones, which may lose up to 60% of their capacity compared to intact plates. Due to its widespread nature, corrosion tends to impact strength more than cracking, leading to a considerable loss of stiffness crucial for preventing buckling. The employed Finite Element analyses were consistent with experimental results, validated by modern techniques such as Digital Image Correlation. This model effectively captured the effects of corrosion degradation and cracks on thin-walled structures but showed some discrepancies, particularly with slender plates. These analyses enhance the understanding of how complex ageing phenomena impact the integrity of steel structural components. Future research should investigate how these degradation mechanisms affect ship hulls, employing random modelling techniques for consequence reliability analysis. Additionally, further experiments on complex structural components will be important.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"216 ","pages":"Article 113711"},"PeriodicalIF":5.7,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144704747","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":"Efficient neural network approach for comprehensive analysis of fixed-guided beams","authors":"Fanhui Meng ,&nbsp;Bo Qi ,&nbsp;Zijian Jing ,&nbsp;Jin Wang ,&nbsp;Xin Li ,&nbsp;Junli Guo","doi":"10.1016/j.tws.2025.113732","DOIUrl":"10.1016/j.tws.2025.113732","url":null,"abstract":"<div><div>This paper conducts a research on the full-process mechanical behavior analysis of fixed guided beams. Compared with traditional neural network prediction technologies, there are significant differences in data characteristics, specifically manifested in a large number of output parameters and a small number of input parameters. Compared with network models such as MLP widely used in engineering, the prediction network model based on decision trees not only has higher accuracy but also features lower computational requirements. A fixed-step dataset of mechanical properties is generated through elliptic integration, and the trained decision tree-based neural network achieves excellent performance under multiple evaluation criteria. Finally, experimental results indicate that there are unpredictable factors between the theoretical and actual values of fixed guided beams, further elaborating on the application prospects of neural network technology in the future.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"216 ","pages":"Article 113732"},"PeriodicalIF":5.7,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144704473","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":"Local buckling failure analysis of pipelines containing a dent-corrosion defect under combined internal pressure and bending moment","authors":"Yihuan Wang ,&nbsp;Yuqian Li ,&nbsp;Yu Jiao ,&nbsp;Guojin Qin","doi":"10.1016/j.tws.2025.113741","DOIUrl":"10.1016/j.tws.2025.113741","url":null,"abstract":"<div><div>In this work, a nonlinear finite element (FE) model was developed to examine the local buckling failure of X80 steel large-diameter pipelines containing a dent-corrosion defect under combined internal pressure and bending moment. The developed model captured the local physical conditions at the defect zone and investigated the influences of buckling failure process, critical bending moment, and plastic deformation propagation. Critical parameters, including corrosion geometries, pipeline dimensions, dent depth, and internal pressure, were evaluated for their effects on the critical buckling moment. The results revealed that the critical buckling moment positively correlates with pipe diameter, wall thickness, corrosion length, and corrosion depth while negatively correlating with dent depth and internal pressure. When the corrosion depth-to-thickness ratio <span><math><mrow><mi>d</mi><mo>/</mo><mi>t</mi><mo>&gt;</mo><mn>0.3</mn></mrow></math></span>, the buckling moment reduces by over 50 %. Shallow dents (<span><math><mrow><mo>≤</mo><mn>4</mn><mo>%</mo><mi>D</mi></mrow></math></span>) induce significant stress concentration, while deeper dents (<span><math><mrow><mo>≥</mo><mn>6</mn><mo>%</mo><mi>D</mi></mrow></math></span>) enhance buckling resistance due to strain hardening. Among the factors studied, pipe diameter and wall thickness influence buckling capacity most, whereas internal pressure has a slight effect. Corrosion is the primary factor contributing to the buckling failure of a pipeline with a dent-corrosion defect.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"216 ","pages":"Article 113741"},"PeriodicalIF":5.7,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144704772","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":"Parametric study of a cold-formed steel profile employed in composite ribbed slabs","authors":"André V.S. Gomes ,&nbsp;Daniel C.M. Candido ,&nbsp;Lucas F. Favarato ,&nbsp;Johann A. Ferrareto ,&nbsp;Juliana C. Vianna ,&nbsp;Adenilcia F.G. Calenzani","doi":"10.1016/j.tws.2025.113742","DOIUrl":"10.1016/j.tws.2025.113742","url":null,"abstract":"<div><div>Structural systems comprised by prefabricated flooring systems and/or cold-formed steel members are frequently employed in the construction industry due to their versatility, high strength-to-weight ratio, ease of prefabrication, transportation and assembly on site. The unification of these structural systems motivated the creation of composite ribbed slabs, which were defined in this research as ribbed floor systems in which cold-formed steel members are used as joists, and the space between them is filled with inert elements, so called Trelifácil® solution. The focus of this research is to develop parametric studies to examine the flexural capacity and stiffness of the cold-formed profile used in the Trelifácil® solution. A finite element model using ANSYS® 2020R1 was developed and validated with experimental tests to predict the flexural behaviour of the Trelifácil® solution and perform such analysis. Additionally, a finite element model for the entire configuration of the Trelifácil® solution is developed to study the interaction between the trussed reinforcement and the cold-formed steel member.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"216 ","pages":"Article 113742"},"PeriodicalIF":5.7,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144704773","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 gradient-composite effects on mechanical reinforcement of ceramic lattice structures","authors":"Ke Zhong ,&nbsp;Jin Cui ,&nbsp;Zhiguo Wang ,&nbsp;Mingtao Zhang ,&nbsp;Jianwen Wang ,&nbsp;Yiming Li ,&nbsp;Yuhui Zhao ,&nbsp;Jibin Zhao","doi":"10.1016/j.tws.2025.113729","DOIUrl":"10.1016/j.tws.2025.113729","url":null,"abstract":"<div><div>The balance between lightweight design and structural strength in the pressure hull of underwater vehicles remains a critical technical challenge. In this study, gradient ceramic lattice structures (GCLSs) were proposed and fabricated via stereolithography (SL) additive manufacturing. A biomimetic composite structure (GCLS/PR) was developed by integrating phenolic resin (PR) into the GCLSs through a vacuum infiltration process. Through quasi-static compression experiments combined with numerical simulations, the effects of gradient design and composite strategies on the mechanical performance of the structures were systematically investigated. Experimental results reveal that positive gradient design significantly enhances energy absorption efficiency through a periphery-to-core progressive failure mode. Specifically, under positive gradient design, the compressive strength and energy absorption of the body-centered cubic (BCC) structure increased by ∼2.01 times and ∼1.69 times, respectively, compared to non-gradient designs, while those of the octet (OCT) structure improved by ∼1.73 times and ∼1.29 times. The incorporation of PR induced a synergistic strengthening effect, with GCLS/PR achieving up to ∼17.82-time enhancements in compressive strength and ∼167.49-time improvements in energy absorption in comparison to monolithic GCLS. These improvements arise primarily from the stress-transfer efficiency of PR and its protective encapsulation mechanism for fractured struts. The synergistic gradient-composite design strategy significantly enhances the overall performance of ceramic materials, offering a novel technical paradigm for the advancement of the pressure hull materials.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"216 ","pages":"Article 113729"},"PeriodicalIF":5.7,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686666","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":"Digital twin-based expression and operation method for the intelligent construction unit of the cable structure","authors":"Guoliang Shi ,&nbsp;Zhansheng Liu ,&nbsp;Yujie Lu ,&nbsp;Dechun Lu ,&nbsp;Xiuli Du ,&nbsp;Qingwen Zhang ,&nbsp;Zeqiang Wang ,&nbsp;Yifeng Zhao","doi":"10.1016/j.tws.2025.113734","DOIUrl":"10.1016/j.tws.2025.113734","url":null,"abstract":"<div><div>The construction process of cable structure has the phenomenon of complex process and changeable influencing factors. How to construct the digital coordinated transmission mode of construction information and realize intelligent decision-making and control is still a bottleneck problem restricting the development and practice of intelligent construction. In this study, the characterization and operation method of cable structure intelligent construction unit (ICU) based on digital twin (DT) is proposed. According to the construction forming characteristics of cable structure, the ICU assembly is defined from the perspective of structural components, construction process and control index. The basic unit is divided, and the mechanism of intelligent construction unit is clarified. Based on the efficient construction of human-computer interaction, a DT six-dimensional reference model is established to realize the sensing and integration, calculation and analysis, control and execution of construction information. On this basis, the operation method of ICU of cable structure driven by DT is given from three aspects: optimal operation control, process correlation coupling and process evolution. The efficient turnover of equipment and tooling and fine construction in the whole process of splicing, lifting and tensioning are realized. Taking the construction process of cable truss structure as an example, a DT construction control platform is developed to verify the practicability and effectiveness of the proposed method and technology. The research results show that the establishment of the ICU accurately defines the construction process of the cable structure and significantly improves the construction efficiency. The DT platform developed according to the unit operation mechanism realizes the closed-loop optimization decision of cable structure construction. In the construction process of the cable structure, the collaborative matching of the components and equipment in each process is realized. By comparing the key control indicators, the rationality of the construction is effectively guaranteed.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"216 ","pages":"Article 113734"},"PeriodicalIF":5.7,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686586","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 the bending of non-shallow polynomial shells of revolution","authors":"Alphose Zingoni ,&nbsp;Nosakhare Enoma ,&nbsp;Hlasoa Mahlelebe","doi":"10.1016/j.tws.2025.113731","DOIUrl":"10.1016/j.tws.2025.113731","url":null,"abstract":"<div><div>Thin non-shallow polynomial shells of revolution have considerable potential for use as elevated open-top water-retaining structures, and as components of egg-shaped sludge digesters and other large multi-shell liquid-containment concrete structures. However, their structural behaviour as a particular class of thin shells has hardly been studied. Unlike other non-shallow shells of revolution, the slenderness parameter λ of higher-order polynomial shells of revolution generally varies quite rapidly over the edge zone of the shell, which invalidates the use of the popular Geckeler simplification in the evaluation of edge effects. In this paper, we propose, for the first time in the literature, a procedure for the determination of the effective slenderness parameter in the edge zone of such shells, making it possible to take advantage of the Geckeler approximation in the computation of the edge effect, without too much loss of accuracy. The accuracy of the approach is illustrated through consideration of the bending of a parabolic shell of revolution, for which some general parametric results are presented, and actual stresses calculated for the case of a uniformly pressurized shell with fixed edges. Provided the variation of λ does not exceed 30% over the edge zone (which is usually the case), the proposed approach is shown to yield reasonably accurate results (consistent with the errors already inherent in the Geckeler formulation), and is clearly applicable to polynomial shells of higher order.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"216 ","pages":"Article 113731"},"PeriodicalIF":5.7,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144695034","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":"Tunable bioinspired lattice metamaterials with excellent strength, energy absorption and vibration insulation","authors":"Kang Ji ,&nbsp;Meng Zhao ,&nbsp;YaoFu Zheng ,&nbsp;AiGuo Zhao ,&nbsp;HengAn Wu ,&nbsp;Chuang Liu","doi":"10.1016/j.tws.2025.113727","DOIUrl":"10.1016/j.tws.2025.113727","url":null,"abstract":"<div><div>In the design of lightweight lattice metamaterials, achieving a seamless integration of exceptional mechanical properties, tunability, and superior vibration isolation performance represents a significant advancement. Here, we propose two novel lattice structures inspired by the morphological architecture and biomechanical mechanisms of Chinese dogwood (Cornus kousa), which demonstrate remarkable multifunctional performance, including high strength, high energy absorption, tunable stress plateaus, controllable deformation modes, and effective vibration isolation. The results demonstrate that the Chinese dogwood-inspired lattice with rectangular beams (CDiL-RB) achieves impressive compressive strength (up to 56.14 MPa) and exceptional energy absorption (up to 32.1 J/cm³), surpassing benchmark designs. The tunability of the two lattices is enabled by geometric parameter modulation and stair-stepping design, allowing control over the number and height of stress plateaus in their stress-strain response. The modified Chinese dogwood-inspired lattice with circular tubular beams (CDiL-CTB) exhibits stable stress responses while retaining high strength (up to 76.55 MPa) and energy absorption capacity (up to 42.25 J/cm³), addressing the instability observed in the original CDiL-RB lattice. Furthermore, inspired by the natural vibration-isolation mechanisms of Chinese dogwood, a local resonance strategy is incorporated into lattice designs to enhance vibration isolation. One design achieves multiple distinct complete bandgaps across the 7.4–121.6 kHz frequency range, demonstrating effective broadband vibration isolation. The proposed lattices exhibit exceptional mechanical properties, making them ideally suited for vibration isolation structural designs.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"216 ","pages":"Article 113727"},"PeriodicalIF":5.7,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686588","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}