International Journal of Mechanical Sciences最新文献

{"title":"Constrained vibration of butterfly-shaped honeycomb sandwich panels under base motion","authors":"Liu Rong ,&nbsp;Zhong Yifeng ,&nbsp;Poh Leong Hien ,&nbsp;Tang Yuxin ,&nbsp;Li Wei","doi":"10.1016/j.ijmecsci.2025.110267","DOIUrl":"10.1016/j.ijmecsci.2025.110267","url":null,"abstract":"<div><div>Periodic base motion at the edges of panels can induce significant vibrations, impacting stability, safety, and stealth performance. This study examines the vibration characteristics of butterfly-shaped auxetic honeycomb sandwich panels (BF-HSP) under base motion. Through experiments and 3D FE modeling (3D-FEM), the accuracy of the 2D equivalent plate model (2D-EPM), based on the variational asymptotic method, is validated in free modal analysis. Further analysis using 3D-FEM and 2D-EPM evaluates the constrained modes and local responses of BF-HSP under periodic base motions. Compared to 3D-FEM simulations, the equivalent model enhances computational efficiency, requiring only 1.04% of the computation time, while maintaining high accuracy in predicting constrained vibration characteristics, with a maximum error under 10%. Compared to arc-shaped and re-entrant honeycomb sandwich panels (AR-HSP and RE-HSP), the proposed BF-HSP excel in suppressing low-frequency resonance and reducing resonance amplitude by up to 6.1%. Local field analysis reveals that the butterfly-shaped core of BF-HSP effectively mitigates dynamic stress concentration, especially along the inclined core struts, resulting in a 4.1% reduction in local dynamic stress compared to AR-HSPs and a 32.4% reduction compared to RE-HSPs. This study offers a highly efficient and reliable solution for the design of auxetic honeycomb sandwich panels, enhancing vibration damping performance and structural stability while mitigating the adverse effects of vibration resonance.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"296 ","pages":"Article 110267"},"PeriodicalIF":7.1,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874278","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":"Aero-engine blade error distributions predictions using novel machine learning models","authors":"Hua Yang ,&nbsp;Haoning Wang ,&nbsp;Qiangfei Huang ,&nbsp;Xingfu Wu ,&nbsp;Wenbin Ji ,&nbsp;Zirui Li ,&nbsp;Xu Han","doi":"10.1016/j.ijmecsci.2025.110262","DOIUrl":"10.1016/j.ijmecsci.2025.110262","url":null,"abstract":"<div><div>The milling of thin-walled aero-engine blades presents substantial challenges due to their complex geometry. Accurate prediction of milling error distributions is critical for ensuring machining stability and precision. However, traditional mechanistic models suffer from high complexity and limited adaptability, and most existing data-driven methods often predict only single error values without capturing the full distribution of errors. To bridge this gap, this study proposes a novel Gaussian Mixture Model-based Error Distribution Prediction (GMM-EDP) framework that models the probability distribution of milling errors rather than just point estimates, which, to our knowledge, has not been done in prior studies. Two high-quality experimental datasets were generated after milling 44 blades and 34 impellers, incorporating key machining parameters as inputs. The GMM-EDP framework uses a Gaussian mixture model to characterize complex error distributions and a multi-output machine learning model to predict distributional features. Comprehensive evaluation using Jensen–Shannon divergence, Hellinger distance, total variation distance, and root mean square error (RMSE) demonstrates the framework’s accuracy and robustness. The proposed approach shows excellent generalization across different machining conditions. Results confirm that the GMM-EDP framework not only significantly improves the precision of milling error predictions but also provides deeper insights into machining consistency and uncertainty, which are critical for optimizing process parameters and improving the quality and reliability of thin-walled blade production.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"295 ","pages":"Article 110262"},"PeriodicalIF":7.1,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864185","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":"Effect of heterogeneity on thermal warping of l-PBFed GF/PEEK composites","authors":"Haibin Tang ,&nbsp;Shuxiang Zhang ,&nbsp;Zhangxing Chen","doi":"10.1016/j.ijmecsci.2025.110296","DOIUrl":"10.1016/j.ijmecsci.2025.110296","url":null,"abstract":"<div><div>Glass fiber (GF) reinforced poly-ether-ether-ketone (PEEK) composites produced via laser powder bed fusion (<span>l</span>-PBF) have become a promising material option in the field of spacecraft structure manufacturing. However, the thermal warping of <span>l</span>-PBFed GF/PEEK composites is found to be a challenging issue in engineering practice. In the present study, the effect of heterogeneity on thermal warping deformation of <span>l</span>-PBFed GF/PEEK composites is investigated for space applications. Thin-wall strip specimens with fixed ends are subjected to thermal loading to simulate the constraints experienced by external plates in outer space. The thermal warping of <span>l</span>-PBFed GF/PEEK composites fabricated along different directions and with varying fiber contents are compared, revealing that increased fiber content and improved fiber alignment could mitigate the issue of thermal warping. Further, a computational tool integrating the constitutive relations of the constituents with micro-scale finite element analysis (FEA) models is developed for thermal warping simulation. The thermal constitutive relations of the constituents are assessed, with temperature-dependent stress-strain curves measured for <span>l</span>-PBFed PEEK. The thermal mechanical behavior of <span>l</span>-PBFed PEEK is characterized using the Tschogel’s yield criterion, a non-associated flow rule, and a Kriging surrogate model. The FEA models of <span>l</span>-PBFed GF/PEEK composites are established using a micro-scale reconstruction algorithm. The effect of heterogeneity on the thermal warping of <span>l</span>-PBFed GF/PEEK composites is elaborated using the computational tool, providing critical insights into the structure-property relationships of <span>l</span>-PBFed GF/PEEK composites.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"295 ","pages":"Article 110296"},"PeriodicalIF":7.1,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864313","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":"Modelling elastoplastic and room-temperature creep behaviors in Titanium alloys with hierarchical structures","authors":"Yujie Zhang ,&nbsp;Ming Li ,&nbsp;Kun Jiang ,&nbsp;Hongyu Wang ,&nbsp;Ping Qu ,&nbsp;Hongtao Wang ,&nbsp;Zhihui Li ,&nbsp;Linli Zhu","doi":"10.1016/j.ijmecsci.2025.110294","DOIUrl":"10.1016/j.ijmecsci.2025.110294","url":null,"abstract":"<div><div>Titanium (Ti) alloys possess excellent performance on the strength and creep resistance, which can be effectively manipulated through microstructure and crystal orientations. Most works and models have focused on single-order approaches, one microstructural feature, or phenomenological frameworks. There are few deformation-mechanism-driven and theoretical models with integrate hierarchical microstructure composite. In this work, the elastoplastic and room-temperature creep behaviors are measured in these dual-phase Ti alloys, and the hierarchical structures are experimentally observed in the dual-phase Ti alloys: the first order of hierarchical structures consists of the soft phase and the hard phase attributed to differences in crystal orientation at mesoscale, and the second order is about the composite structure composed of the equiaxed α phase and the secondary (α+β) transition phase at the microscopic level. Within the framework of the micromechanics, the elastoplastic constitutive model for the hierarchically structured Ti alloys is developed through considering the microstructural compositions from SEM and the grain-crystallographic orientation from EBSD, as well as the dislocations pile-up along the phase boundaries. Furthermore, the room-temperature creep constitutive model is also addressed through modifying the Theta model and involving the creep steady-state dislocation motion for the dual-phase Ti alloys with hierarchical structures. Theoretical results demonstrate that the simulated elastoplastic curve and creep constitutive curves are agreeable well with experimental measurements, including the yield stress, strain hardening, and the steady-state creep rates under different applied stresses. The proposed constitutive models are further utilized to forecast the mechanical properties and the creep features of dual-phase Ti alloys with various grain size and volume fraction of phases: the larger grain size and the higher volume fraction of soft phase can lead to the lower yield strength and the higher steady-state creep rates, while the increased interfaces ratio results in the higher yield strength and the lower steady-state creep rates. Crucially, the proposed theoretical modeling framework introduces a novel methodology to characterize the mechanical behaviors of hierarchically structured materials. Namely, based on experimental observations and the framework of elastoplastic mechanics, a theoretical model describing the mechanical properties of materials is established through the micromechanical theory and the crystal dislocation theory. These findings and the proposed models could be helpful for optimizing the mechanical properties of dual-phase Ti alloys such as the yield strength, strain hardening rate, creep performance by designing the composites orientations and distributions of microstructures.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"295 ","pages":"Article 110294"},"PeriodicalIF":7.1,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874490","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":"Missing critical mass ratio in VIV of rigidly connected cylinders","authors":"Zhipeng Yu ,&nbsp;Huan Ping ,&nbsp;Enhao Wang ,&nbsp;Yan Bao ,&nbsp;Hongteng Xu ,&nbsp;Yang Huang ,&nbsp;Qing Xiao","doi":"10.1016/j.ijmecsci.2025.110236","DOIUrl":"10.1016/j.ijmecsci.2025.110236","url":null,"abstract":"<div><div>Two-dimensional numerical study is carried out for two rigidly coupled cylinders in tandem arrangement undergoing the transverse vortex-induced vibration (VIV) at low Reynolds numbers of <span><math><mrow><mi>R</mi><mi>e</mi><mo>=</mo><mn>60</mn></mrow></math></span>, 100, 150 and 200. A fixed center-to-center spacing ratio of <span><math><mrow><mi>s</mi><mo>/</mo><mi>D</mi><mo>=</mo><mn>2</mn></mrow></math></span> is selected. Results are examined over the reduced velocity range of <span><math><mrow><msub><mrow><mi>U</mi></mrow><mrow><mi>r</mi></mrow></msub><mo>=</mo><mn>0</mn><mo>.</mo><mn>25</mn><mo>−</mo><mn>100</mn></mrow></math></span> and low mass ratios (<span><math><mrow><mn>0</mn><mo>.</mo><mn>02</mn><mo>⩽</mo><msup><mrow><mi>m</mi></mrow><mrow><mo>∗</mo></mrow></msup><mo>⩽</mo><mn>1</mn></mrow></math></span>) are considered. This study reveals several distinct features that differ significantly from single cylinder VIV. First, contrary to single cylinder cases where a critical mass ratio exists, no critical mass ratio is observed in the tandem system at <span><math><mrow><mi>s</mi><mo>/</mo><mi>D</mi><mo>=</mo><mn>2</mn></mrow></math></span> and the amplitude response increases smoothly with decreasing mass ratio. Second, decreasing mass ratio leads to enhanced soft lock-in behavior with frequency ratios progressively decreasing below unity while triggering earlier and more rapid amplitude growth. The lock-in bandwidth also shows an unexpected trend by narrowing with decreasing mass ratio in the extremely low mass ratio regime (<span><math><mrow><msup><mrow><mi>m</mi></mrow><mrow><mo>∗</mo></mrow></msup><mo>⩽</mo><mn>1</mn></mrow></math></span>), which is opposite to the widening trend observed in systems with <span><math><mrow><msup><mrow><mi>m</mi></mrow><mrow><mo>∗</mo></mrow></msup><mo>&gt;</mo><mn>1</mn></mrow></math></span>. Third, a distinctive quasi-periodic response characterized by beating phenomena appears in the lower branch (<span><math><mrow><msub><mrow><mi>U</mi></mrow><mrow><mi>r</mi></mrow></msub><mo>=</mo><mn>2</mn><mo>.</mo><mn>5</mn><mo>−</mo><mn>4</mn><mo>.</mo><mn>25</mn></mrow></math></span>). Detailed force decomposition reveals pressure forces dominate over viscous forces with pressure lift coefficients of the upstream and downstream cylinders. It is the phase differences between two cylinders that leads to the quasi-periodic behavior. Moreover, Dynamic mode decomposition analysis shows this quasi-periodicity results from vortex impingement on the downstream cylinder. These findings offer new insights into the complex fluid–structure interactions in tandem cylinder arrangements at extremely low mass ratios, with practical implications for engineering applications such as the design of twin-tube submerged floating tunnels.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"295 ","pages":"Article 110236"},"PeriodicalIF":7.1,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864184","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":"Analysis of creep-dominated tensile stress-strain data","authors":"TW Clyne","doi":"10.1016/j.ijmecsci.2025.110295","DOIUrl":"10.1016/j.ijmecsci.2025.110295","url":null,"abstract":"<div><div>A novel analysis is presented of tensile nominal stress-strain data, covering a range of strain rates, for cases in which the behaviour is dominated by creep. Example calculations are carried out using reported outcomes from several publications: no new experimental data are presented. An important part of the analysis is conversion of the raw nominal data to true values, for stress, strain and strain rate. Two procedures are described for extraction of creep characteristics from experimental data of this type. The first is based on a simple logarithmic plot, with a combination of a true stress and a corresponding true creep strain rate being obtained from each test having a given nominal strain rate. The other involves the use of a simple numerical model, which can be implemented using a spreadsheet, with creep parameter values being obtained via optimisation of the fit between experimental and modelled stress-strain curves. These approaches offer attractions for obtaining creep parameters via experimental procedures that are simpler, more robust and easier to carry out than those of conventional creep testing. They are, however, applicable only to cases for which the rates of creep are relatively high and there is no early necking.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"295 ","pages":"Article 110295"},"PeriodicalIF":7.1,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143860140","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":"Strain hardening behavior of pure Ni at cryogenic temperatures: Experiments and modeling","authors":"Zhide Li ,&nbsp;Cheng Lu ,&nbsp;Zeng Tan ,&nbsp;Rui Wang ,&nbsp;Charlie Kong ,&nbsp;Hailiang Yu","doi":"10.1016/j.ijmecsci.2025.110293","DOIUrl":"10.1016/j.ijmecsci.2025.110293","url":null,"abstract":"<div><div>Research on the mechanical properties of metals under cryogenic conditions has attracted considerable attention, driven by the increasing demand for applications in extreme environments. The current study examines the tensile properties, and strain-hardening behavior of pure nickel across a temperature range from 77 K to 298 K. Findings indicate a marked increase in yield strength, tensile strength, and uniform elongation of pure nickel as temperature decreases, with pronounced effects observed at 77 K. Tensile strength increases by roughly 200 MPa at 77 K compared to 298 K. The cryogenic temperature significantly enhances strain-hardening, primarily by inhibiting dynamic recovery. Enhanced strain hardening and the formation of diffuse shear bands, which support uniform deformation, contribute to the improvement in uniform elongation at lower temperatures. Utilizing experimental data and the Kocks-Mecking model, a modified constitutive model for cryogenic temperatures has been developed to describe the effect of temperature reduction on dynamic recovery and quantitatively linking temperature reduction to strain-hardening enhancement, with its accuracy verified. This research elucidates the mechanisms underlying the simultaneous enhancement of strength and ductility in pure nickel under cryogenic conditions, providing essential theoretical guidance for optimizing the properties of metallic materials in cryogenic conditions and their potential for cryo-forming applications.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"295 ","pages":"Article 110293"},"PeriodicalIF":7.1,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864455","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":"Dissipative locally resonant metasurfaces for low-frequency Rayleigh wave mitigation","authors":"Siqi Wang ,&nbsp;Zhigang Cao ,&nbsp;Shaoyun Wang ,&nbsp;Qian Wu ,&nbsp;Jiaji Chen ,&nbsp;Yuanqiang Cai ,&nbsp;Guoliang Huang","doi":"10.1016/j.ijmecsci.2025.110233","DOIUrl":"10.1016/j.ijmecsci.2025.110233","url":null,"abstract":"<div><div>Low-frequency Rayleigh waves from earthquakes and traffic pose significant risks to engineering structures, yet their broadband mitigation remains a challenge. To address this, we develop an elastic dissipative metasurface (EDM) that leverages multi-resonance and engineered damping to achieve broadband Rayleigh wave suppression. Using effective theory, we establish a framework for describing the wave behavior of EDMs, which closely matches numerical simulations and provides an efficient approach to designing advanced metasurfaces. Our analysis reveals that damping can break the traditional constraint requiring Rayleigh wave dispersion curves to stay outside of the sound cone, allowing them to enter the sound cone. To quantify energy transfer processes, we introduce a mechanical energy flux analysis based on Poynting’s theorem, revealing the scattering and conversion of Rayleigh waves into other wave modes in dissipative systems. Furthermore, we propose an adiabatic EDM design, incorporating slow spatial modulation to eliminate reflections and achieve perfect rainbow absorption. This approach ensures seamless energy dissipation while overcoming the narrowband limitations and imperfect absorption of conventional metasurfaces. Numerical simulations confirm the superior performance of EDMs, demonstrating broadband wave mitigation, enhanced absorption, and controlled energy conversion. Our findings provide new insights into Rayleigh wave manipulation through engineered dissipation and graded microstructures, paving the way for next-generation functional metasurfaces with applications in seismic isolation, structural protection, and vibration control.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"296 ","pages":"Article 110233"},"PeriodicalIF":7.1,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874186","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 nonlinear piezoelectric metabeams for multimode vibration suppression","authors":"Lingyun Gong ,&nbsp;Guanshuo Zhang ,&nbsp;Penglin Gao ,&nbsp;Ruike Wu ,&nbsp;Guoxu Wang ,&nbsp;Yegao Qu","doi":"10.1016/j.ijmecsci.2025.110238","DOIUrl":"10.1016/j.ijmecsci.2025.110238","url":null,"abstract":"<div><div>Vibration suppression, especially over a wide band at low frequencies, is a long-standing and challenging problem. Here, the design method and mechanism of using nonlinear synthetic impedance circuits to suppress vibrations of piezoelectric metabeams is explored. We first investigate the dynamic characteristics of a nonlinear piezoelectric unit cell under different nonlinear coefficients with a reduced-order finite element model. Numerical results show that the nonlinear coefficients required to suppress vibration differ by an order of magnitude for distinct resonant peaks. Besides, it is discovered that while some nonlinear coefficients can attenuate resonant peaks by transferring the mechanical energy to the circuit and dissipating, they meanwhile amplify vibrations at slightly lower frequencies prior to the resonant peaks, both suppression and amplification are accompanied by quasiperiodic and chaotic behaviors. Therefore, we propose a piezoelectric unit cell with tunable cubic nonlinear coefficients dependent on the excitation frequency, avoiding vibration amplification. With this design method, it is demonstrated that the piezoelectric metabeam can be tuned to suppress vibration in a wide band within 400 Hz, showing notable robustness to different resistance and excitation levels. A piezoelectric metabeam experiment was conducted to verify the findings. The consistency of simulated and measured transmissibility validates the feasibility of tunable multimode vibration suppression by harnessing circuit nonlinearity.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"295 ","pages":"Article 110238"},"PeriodicalIF":7.1,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143867733","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":"Enhancing rejuvenation of metallic glass via vibration-superimposed elastic loads","authors":"Hongjun Cai,&nbsp;Mao Zhang,&nbsp;Junru Shi,&nbsp;Jiacheng Zhang,&nbsp;Yunfei Ma,&nbsp;Binghui Deng,&nbsp;Pan Gong,&nbsp;Lei Deng,&nbsp;Junsong Jin,&nbsp;Xuefeng Tang,&nbsp;Xinyun Wang","doi":"10.1016/j.ijmecsci.2025.110285","DOIUrl":"10.1016/j.ijmecsci.2025.110285","url":null,"abstract":"<div><div>Structural rejuvenation significantly improves the plasticity of metallic glasses, though understanding its atomic mechanisms and identifying effective processing methods remain challenging. In this study, we investigate the effects of vibration-superimposed elastic loading on the structure and properties of metallic glasses through combined experiments and molecular dynamics simulations. The results demonstrate that superimposing vibration during elastic loading enhances structural rejuvenation and plasticity beyond what is achieved by elastic loading alone. Molecular dynamics simulations reveal that superimposed vibration increases atomic mobility and promotes local structural excitations (LSEs), which drive micro-plastic deformation entirely within the elastic regime. These LSEs facilitate the transformation of densely packed icosahedral (ICO)-like Voronoi polyhedron (VP) into mixed and crystal-like VPs, accompanied by an increase in excess free volume and structural disorder. Additionally, the redistribution of shear stress between ICO-like and non-ICO regions under superimposed vibration further promotes localized stress relaxation and plastic rearrangement. Overall, our findings demonstrate that vibration-superimposed elastic loading effectively induces atomic-level structural rejuvenation and enhances the plasticity of metallic glasses at room temperature, providing a promising strategy for improving their mechanical performance.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"295 ","pages":"Article 110285"},"PeriodicalIF":7.1,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143854882","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}