International Journal of Mechanics and Materials in Design最新文献

{"title":"Nonlinear aerodynamic response and design of auxetic cellular sandwich panels for next-generation sports stadium roofs","authors":"Binglong Xu,&nbsp;Long Chen,&nbsp;Hamed Safarpour,&nbsp;Mustafa Bayram","doi":"10.1007/s10999-026-09947-9","DOIUrl":"10.1007/s10999-026-09947-9","url":null,"abstract":"<div><p>The ability to support the structural load from the roof system while providing a safe environment is a vital factor when designing modern sports stadiums. Roof systems must also be able to endure extreme amounts of aerodynamic forces and provide effective protection against high-speed winds associated with extreme weather patterns without putting the sporting event or the comfort of spectators at risk. The purpose of the study is to develop an innovative design using nonlinear aerodynamics of doubly curved sandwich panels using an auxetic core and graphene nanoplatelets (GPL) reinforced faces of the panel, and to create new roof systems for large-span stadiums. Using the Carrera unification formulation (CUF) in conjunction with the principle of virtual displacement (PVD), this study establishes equivalent single-layer (ESL), layer-wise (LW), and variable-kinematic models for accurately modeling through-thickness deformations of the panels. Aerodynamic loads are applied to the models through the implementation of first-order piston theory for the aerodynamic actions imposed on the panel due to supersonic flow (i.e., actions due to aircraft flying over) and third-order piston theory for hypersonic flow conditions (i.e., severe wind gusts due to weather conditions). Flutter and divergence thresholds that prevent catastrophic roof failure during live sporting events are defined through a nonlinear eigenvalue solution. A deep neural network (DNN) trained using particle swarm optimization (PSO) and genetic algorithm (GA) on simulation data from stadiums stems from the desire to validate more robustly than current analytical benchmarks and presented finite element (FE) software, providing both rapid and accurate prediction of stadium-specific design codes. The results of these comparisons are consistent with existing literature, while parametric studies have demonstrated that an auxetic/GPL hybrid configuration will increase the critical dynamic pressure compared to conventional honeycomb panels. These results yield sport stadium roofs that are lighter, safer, and more resilient, protecting both athletes and spectators throughout all types of airflow patterns from calm summer match conditions to storm-generated hypersonic gusts.</p></div>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":"22 3","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Role of heat source/sink and chemical reaction on natural convection flow in a vertical porous microchannel with Hall current and ion slip","authors":"Abdulmalik A. Hussain,&nbsp;Michael O. Oni","doi":"10.1007/s10999-026-09946-w","DOIUrl":"10.1007/s10999-026-09946-w","url":null,"abstract":"<div><p>Magnetohydrodynamic flows in microchannels with heat and mass transfer are of considerable interest due to their applications in microfluidic devices, thermal management systems, biomedical engineering, and chemical processing. This study theoretically investigates the steady-state magnetohydrodynamic behavior and flow formation of a Newtonian viscous fluid flowing through a vertical microchannel with porous walls, incorporating both heat and mass transfer phenomena. The primary objective is to examine the combined effects of Hall and ion-slip currents, rarefaction, heat source/sink, chemical reaction, and wall suction/injection on the flow, thermal, and concentration fields within the slip flow regime. The governing coupled momentum, energy, and concentration equations, are solved analytically using complex-variable potential techniques together with the method of undetermined coefficients. Graphical representations using MATLAB highlight the impact of pertinent parameters on velocity, temperature, and concentration profiles. Findings indicate that combined electromagnetic effects and wall interactions significantly modify the thermal and solutal boundary layers. Specifically, increasing rarefaction, heat source/sink, and chemical reaction enhance both momentum and thermal penetration, while stronger Hall currents attenuate induced flow without significantly affecting the primary velocity. Moreover, wall injection reduces the buoyancy-driven force, suppresses both thermal and solutal transport, whereas suction enhances them. Generally, the results provide valuable insights into the control and optimization of microscale transport processes through electromagnetic and boundary-condition manipulation, with potential applications in advanced microfluidic and thermal systems.</p></div>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":"22 3","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A refined scale-dependent IGA for smart functionally graded piezoelectric sandwich microplates with honeycomb core","authors":"P. T. Hung,&nbsp;P. Phung-Van,&nbsp;Chien H. Thai","doi":"10.1007/s10999-026-09935-z","DOIUrl":"10.1007/s10999-026-09935-z","url":null,"abstract":"<div><p>This study presents a novel comprehensive investigation of functionally graded (FG) piezoelectric sandwich microplates which incorporate a hexagonal honeycomb core and that rest on an elastic foundation, a theoretical formulation which is rigorously developed within isogeometric approach (IGA) framework. Unlike previous works, the proposed model integrated modified strain gradient theory (MSGT) with a four-variable refined plate theory (RPT). Compared to nonlocal or micropolar theories, the MSGT provides a more robust representation of size-dependent effects by incorporating three length scale parameters that explicitly capture both higher-order strain gradients and the resulting stiffening effects that occur at the microscale. Furthermore, the sandwich microplate incorporates two FG piezoelectric layers composed of PZT-4 and PZT-5H that are distributed according to a prescribed power law scheme, a structural configuration which thereby enables a highly multifunctional electromechanical performance. The equilibrium equations are derived using the principle of virtual work, while IGA formulation ensures the required <i>C</i>²-continuity by employing cubic NURBS basis functions that are capable of providing at least third-order derivatives. Comprehensive numerical studies are conducted to benchmark the proposed formulation against existing analytical and numerical results, a rigorous validation process which confirms its exceptional accuracy and superior predictive capability. Beyond this fundamental validation, numerical investigations deliver new insights into the influence of length scale parameters (LSPs), power index and external electric voltage on coupled mechanical-electromechanical responses that govern these complex hexagonal honeycomb-core FG piezoelectric sandwich microstructures.</p></div>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":"22 3","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nonlinear bending analysis of arbitrarily shaped plates using discrete Ritz method and virtual springs","authors":"Lei Duan,&nbsp;Yongjie Zhang,&nbsp;Zhao Jing,&nbsp;Ke Liang","doi":"10.1007/s10999-026-09932-2","DOIUrl":"10.1007/s10999-026-09932-2","url":null,"abstract":"<div><p>Discrete Ritz method (DRM) is combined with virtual spring technique, first-order shear deformation theory (FSDT), and Newton–Raphson method, for the first time, to analyze the nonlinear bending problem of arbitrarily shaped plates under different geometric boundary conditions. DRM constructs a rectangular domain enclosing the geometric domain of the plate, and then, by using Gauss points in the rectangular domain for discretization associate with variable stiffness properties, the plate geometry is numerically simulated by cutouts within the rectangle. The global displacement field of the plate is approximated by Legendre polynomials based first-order shear deformation theory. The geometric nonlinearity is considered in terms of the von Kármán nonlinear theory. Virtual spring technique is used to simulate spring stiffness coefficient of distinct boundary conditions on complex geometric domain and embedded into the global stiffness matrix. DRM is combined with Newton-Raphson method to solve the nonlinear bending equations of plate with complex geometries. Numerical examples and comparisons with the results in the literature and FEM demonstrate that DRM based on constraint springs can be used to analyze the geometric nonlinearity of arbitrarily shaped plates under different boundary conditions with good feasibility and accuracy.</p></div>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":"22 3","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Irreversibility analysis of transient thin film flow of electro-magneto-micropolar fluid over a horizontally stretched sheet: differential transforms method","authors":"P. P. Nayak,&nbsp;S. R. Mishra,&nbsp;Priya Mathur,&nbsp;Subhajit Panda","doi":"10.1007/s10999-026-09953-x","DOIUrl":"10.1007/s10999-026-09953-x","url":null,"abstract":"<div><p>Magneto-micropolar fluids have emerged in various advanced technological and biomedical applications, including electronic cooling devices, drug delivery processes, and thermal control in magneto-thermal environments. In the proposed investigation, the synergetic incorporation of nanoparticles such as <span>({text{Al}}_{{2}} {text{O}}_{{3}})</span> and <span>({text{TiO}}_{{2}})</span> into water-based fluid provides superior thermal performance because of enhanced conductivity. The heat and fluid flow characteristic of a magneto-micropolar hybrid nanofluid, combined with the effect of dissipation properties with improved the physical system. The governing mathematical models are transformed into standard form utilizing similarity rules, and further, the Differential transform method (DTM) is implemented, which ensures the analytical convergence and computational efficiency. The analysis of the induced electric field coupled with magnetic intensity modifies the rotational and translational behaviour. The dissipative heat impact is found to enrich the transport phenomenon. The irreversibility conducted by various properties gives rise to the impact of entropy generation. This feature arises owing to heat transfer irreversibility, irreversibility caused by dissipation, etc. The results of various factors implemented in the flow patterns are deployed graphically, followed by validation of the results in particular cases. Further, the variations are reported, and physical descriptions are provided briefly.</p></div>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":"22 3","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nonlinear forced vibration in magneto-electro-elastic laminated nanoplates with flexomagnetoelectric effect","authors":"Liang-liang Xu,&nbsp;Chang-ping Chen,&nbsp;Yu-fang Zheng","doi":"10.1007/s10999-026-09942-0","DOIUrl":"10.1007/s10999-026-09942-0","url":null,"abstract":"<div><p>This research examines the nonlinear forced vibrations of magneto-electro-elastic laminated nanoplates, incorporating the flexomagnetoelectric influence. The system’s displacement field is formulated using higher-order shear deformation theory, with geometric nonlinearities captured via the von Karman theorem. Size-dependent phenomena are integrated through the nonlocal strain gradient theory. The nonlinear formulas of kinematics are founded by applying Hamilton’s principle and variational methods, where the Airy stress function is brought to address nonlinear-nonlocal interactions. These governing formulas are subsequently disposed of employing the Galerkin procedure and the method of multiple scales, yielding the system’s amplitude-frequency response equations and corresponding curves. Utilizing this model, a granular scrutiny is orchestrated on the flexomagnetoelectric impact, scale parameters, temperature, moisture, electric potential, magnetic potential, and elastic foundations that affect the nonlinear primary resonance performances of the magneto-electro-elastic laminated nanoplates. The results show that the flexomagnetoelectric effect can reduce the amplitude of the nonlinear primary resonance in the magneto-electro-elastic system. The outcomes of this work offer a notional foundation for employing magneto-electro-elastic materials in intelligent sensors.</p></div>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":"22 3","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of an isogeometric method on vibration control analysis of smart perovskite solar doubly-curved microshells","authors":"Thai-Hoang Nguyen","doi":"10.1007/s10999-026-09949-7","DOIUrl":"10.1007/s10999-026-09949-7","url":null,"abstract":"<div><p>Smart perovskite solar cells provide engineers with a flexible, economical, and exceptionally efficient renewable energy alternative. Due to their adjustable material characteristics, straightforward manufacturing methods, and flexibility to integrate into various surfaces and structural elements, these devices have garnered considerable interest for sustainable energy production. Their versatility further fosters the advancement of renewable energy technology and energy-efficient architectural designs. To ensure reliable long-term operation, it is crucial to understand the mechanical behaviour of these systems, especially their response to external mechanical stimuli that could affect structural integrity and functional performance. This study examines the vibrational characteristics of a smart perovskite solar doubly curved microshell resting on a viscoelastic foundation that integrates a functionally graded graphene origami-enabled auxetic metamaterial (FG-GOEAM) layer within its metallic core, accompanied by sensor and actuator face sheets. The equations of motion are formulated using Hamilton’s principle within the context of first-order shear deformation theory (FSDT) integrated with modified couple stress theory (MCST) to address size-dependent phenomena. The resulting equations are discretized using the isogeometric analysis (IGA) approach, and the Newmark direct time-integration scheme is employed to obtain the dynamic responses of the doubly-curved microshell. A thorough parametric analysis is conducted to assess the effects of various critical parameters, such as the folding degree, distribution pattern, and weight fraction of graphene origami (GOri), along with the material length-scale parameter and microshell geometric dimensions, on the forced vibration characteristics of the FG-GOEAM doubly curved microshell. This study’s findings offer significant insights into the design and optimization of advanced microelectromechanical systems (MEMS) and energy-harvesting devices functioning under intricate environmental and mechanical circumstances.</p></div>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":"22 3","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrated modeling and stiffness regulation of SMA-based aeroengine variable stiffness bracket","authors":"Yichi Zhang,&nbsp;Kuan Lu,&nbsp;Wentao Zhang,&nbsp;Ruijuan Sang,&nbsp;Dai Xu,&nbsp;Dapeng Fu,&nbsp;Jin Chen,&nbsp;Yang Yang,&nbsp;Hui cheng,&nbsp;Chao Fu","doi":"10.1007/s10999-026-09955-9","DOIUrl":"10.1007/s10999-026-09955-9","url":null,"abstract":"<div><p>Aeroengine brackets must fulfill two conflicting requirements: high load-bearing stiffness and effective vibration isolation flexibility. This challenge centers on the scientific problem of real-time structural stiffness regulation. This paper presents the design and realization of a smart bracket with active variable stiffness capability. By combining modeling with experimental analysis, we developed a methodology for regulating and measuring the stiffness of complex truss structures. Leveraging the phase transformation characteristics of shape memory alloy, a novel bracket was designed with SMA plates serving as its key supporting components. An integrated model of the aeroengine casing-bracket-accessory system was established to simulate its stiffness variation under realistic operational scenarios. Simulation results show a reversible stiffness increase of 22.6% over the range 40–100 ℃, with a highly symmetric mechanical response. We developed an insulation-encapsulated heating strategy and implemented a novel multi-sensor cooperative measurement scheme to achieve quantitative characterization of the bracket’s equivalent stiffness. Experimental validation further revealed the complex dynamic behavior of SMA within real structures. The bracket’s stiffness increased by up to 30.67%. Furthermore, a significant thermo-mechanical hysteresis was observed. Completing the full transformation took approximately 66% longer than merely reaching the transformation temperature. This work provides crucial design principles and methodological support for developing intelligent connection structures and active vibration control technologies for aeroengines.</p></div>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":"22 3","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148466501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Closed-loop AI control of nanoparticle transport under mixed convection: application to electromagnetic propulsion power generation","authors":"Nahid Fatima,&nbsp;Nouman Ijaz,&nbsp;Ahmed Zeeshan,&nbsp;Talal Taha,&nbsp;Najma Saleem,&nbsp;Abaker A. Hassaballa","doi":"10.1007/s10999-026-09954-w","DOIUrl":"10.1007/s10999-026-09954-w","url":null,"abstract":"<div><p>The efficient heat transfer and control of heat flow is essential to electromagnetic propulsion and MHD power generation systems. The present study deals with the effect of magnetic field, thermal radiation, Brownian motion and thermophoresis on the unsteady flow and heat transfer characteristics of a second grade viscoelastic nanofluid flowing over a stretching surface. A physics-informed, closed-loop artificial intelligence framework is developed, integrating a feed-forward artificial neural network for real-time flow field prediction with response surface methodology for global sensitivity analysis and parameter optimization. Results reveal that the second-grade viscoelastic parameter enhances the velocity boundary layer, while increasing magnetic field intensity suppresses fluid motion through Lorentz force retardation. Thermophoretic effects augment thermal energy distribution, whereas increasing Schmidt number progressively diminishes nanoparticle concentration profiles. The model was statistically reliable as confirmed by ANOVA-RSM analysis at 95% confidence level with the <i>R</i>² and Predicted-<i>R</i>² values of 100%. Residual diagnostics showed that the errors were random, and the sensitivity analysis showed that the parameter which has the greatest effect on the heat transfer is thermal radiation, followed by thermophoresis and Brownian motion (<i>p</i> &lt; 0.05). Streamline contour analysis further demonstrates significant topological restructuring of flow patterns under variable magnetic flux densities. The integrated neuro-architecture provides an end-to-end platform for time-dependent optimization, closed-loop control, and deep physical understanding of magneto-plasmonic nanofluid transport in advanced energy systems.</p></div>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":"22 3","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148466441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamic response analysis and topology optimization for vibration reduction of television packaging systems under random vibration","authors":"Xiaolei Yan,&nbsp;Zhiqiang Tang,&nbsp;Xinkai Ding,&nbsp;Xiyuan Fan,&nbsp;Lintao Wang","doi":"10.1007/s10999-026-09951-z","DOIUrl":"10.1007/s10999-026-09951-z","url":null,"abstract":"<div><p>With the development of large-screen, thin LCD televisions, transportation-induced vibrations pose significant risks to low-stiffness components such as the LCD panel and diffuser plate. To address this, a high-fidelity coupled finite element model of the television-packaging system was established, and random vibration responses under power spectral density (PSD) excitation were analyzed using the modal superposition method. The results indicate that vibration energy is primarily concentrated in low-frequency ranges dominated by coupled global and local modes. The model was subsequently validated through vibration experiments, demonstrating high accuracy. Based on these results, a topology optimization method for cushioning pads was proposed to minimize low-frequency vibration transmissibility. Unlike conventional methods that focus on stiffness or local responses, this approach targets suppression of vibration energy transmission to critical components. After optimization, transmissibility decreased from 1.15 to 0.89, the maximum displacements of the LCD panel and diffuser plate dropped by 22.3% and 36.2%, and the PSD peak in the critical frequency band was reduced by 51.4%. Experimental tests confirmed reductions of 53.1% and 30.8% in acceleration responses under random and sinusoidal excitations, demonstrating the effectiveness of the proposed method in enhancing vibration protection.</p></div>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":"22 3","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148465531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}