International Journal of Mechanical Sciences最新文献

{"title":"Topology optimization of phoxonic crystals for maximizing dual bandgaps using GA-SIMP method","authors":"Bin Li ,&nbsp;S.S. Nanthakumar ,&nbsp;Yan Pennec ,&nbsp;Bahram Djafari-Rouhani ,&nbsp;Xiaoying Zhuang","doi":"10.1016/j.ijmecsci.2025.110359","DOIUrl":"10.1016/j.ijmecsci.2025.110359","url":null,"abstract":"<div><div>Phoxonic crystals are photonic-phononic or optomechanical periodic structures that simultaneously exhibit dual bandgaps. This allows for the confinement of both optical and elastic waves in cavities and waveguides, providing a powerful platform for novel optomechanical devices and systems. The opening of dual bandgaps is crucial to these potential applications. Topology optimization offers maximum freedom in the dual bandgap structure design, however, relevant research is limited. We propose a two-stage algorithm to maximize the dual bandgaps, where a genetic algorithm is used to find the initial design, and then the SIMP method is employed to obtain the optimal solution. This GA-SIMP hybrid approach capitalizes on the global search capability of GA to explore the design space and identify potential configurations, while harnessing the computational efficiency and precision of SIMP to refine and converge to high-quality solutions. This strategy effectively balances global exploration with local refinement, addressing the trade-off challenges in dual bandgap optimization for phoxonic crystals. We demonstrate the design capability of the coupled methodology by opening bandgaps between different bands in the numerical examples, and the optimized structures show intermediate states between interconnected and mutually independent configurations.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"300 ","pages":"Article 110359"},"PeriodicalIF":7.1,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144190143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Energy-state-dependent mechanical and structural heterogeneity in metallic glasses probed by nanoindentation","authors":"S.Q. Fu ,&nbsp;Y.J. Duan ,&nbsp;K. Tao ,&nbsp;K.K. Song ,&nbsp;Y.J. Wang ,&nbsp;E. Pineda ,&nbsp;Q.F. He ,&nbsp;Z.Q. Zhang ,&nbsp;Y. Yang ,&nbsp;J.C. Qiao","doi":"10.1016/j.ijmecsci.2025.110427","DOIUrl":"10.1016/j.ijmecsci.2025.110427","url":null,"abstract":"<div><div>The plastic deformation behavior of metallic glasses is sensitive to the structural states, i.e., as-cast, aged and rejuvenated states. In the current work, Zr₅₀Cu₄₀Al₁₀ metallic glass with different energy states, which were tuned by high-pressure torsion method, is studied by nanoindentation. With the help of the statistical analysis of the first pop-in event, the cooperative shear model is used to describe the size of shear transformation zones (STZs), revealing the variations of STZs influenced by different energy states. The strain rate sensitivity of the metallic glass with various energy states obtained from creep experiments demonstrated that the mechanical softening effect induced by HPT enhances the plasticity of metallic glasses. Within the framework of molecular dynamics simulations, the structural evolution of metallic glasses at the atomic scale under different loading rates is analyzed. The results provide an atomic-scale explanation for the significant enhancement of plastic deformation in metallic glasses with higher energy state and under high strain rate. The research indicates that severe plastic deformation can nucleate STZs with lower energy barriers during the severe plastic deformation in metallic glasses with high-energy states. It also indicated that severe plastic deformation can introduce multiple shear bands during this process. Furthermore, the intersection of shear bands and the presence of multiple shear bands enhance energy dissipation, potentially improving the plasticity of metallic glasses. The underlying physics of the energy state and strain rate independence of plastic deformation is discussed, providing insights into the nucleation and propagation of STZs and shear bands in metallic glasses.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"299 ","pages":"Article 110427"},"PeriodicalIF":7.1,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144195087","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":"3-DOF decoupled magnetic platform for optical low-frequency vibration isolation","authors":"Wen-Hao Qi ,&nbsp;Tian-Yu Zhao ,&nbsp;Qiu-Hua Gao ,&nbsp;Jia-Jia Lu ,&nbsp;Long-Qi Cai ,&nbsp;Yang Li ,&nbsp;Ge Yan ,&nbsp;Wen-Ming Zhang","doi":"10.1016/j.ijmecsci.2025.110429","DOIUrl":"10.1016/j.ijmecsci.2025.110429","url":null,"abstract":"<div><div>Optical instruments, such as atomic force microscopes (AFM), are susceptible to interference from external vibrations, which can diminish imaging clarity and hinder optimal performance. A three-degree-of-freedom (3-DOF) decoupled magnetic platform (DMP) is proposed for optical low-frequency vibration isolation. The specially developed platform attains vibration decoupling through an orthogonal structural design and utilizes six identical vibration isolation units that are specially configured to achieve low dynamic stiffness and significantly low-frequency vibration isolation performance in both horizontal and vertical directions simultaneously. Different from the traditional realization of positive and negative stiffness combination, the novel isolation unit is designed using the constant magnetic force, which is generated from the magnetic field distortion. This implementation is revealed through magnetic field analysis and verified via static calibration. The dynamic model is established by considering viscous damping and dry friction, and the Runge-Kutta Method is applied to calculate the vibration response. Theoretical analyses are conducted to guide the design of the DMP and predict dynamic responses under different structural parameters, damping settings, and excitation conditions. Experiments are implemented to demonstrate the vibration isolation performance of the prototype. The result reveals the different effects of viscous damping and dry friction and demonstrates that the developed DMP has a broad frequency decoupled vibration isolation capability. The magnetic platform achieved by reusing the newly designed quasi-zero stiffness (QZS) unit provides a new option for optical vibration isolation, with the advantages of a large stroke and strong vibration decoupling.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"300 ","pages":"Article 110429"},"PeriodicalIF":7.1,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A modified phase-field model for grain boundary migration in sintering","authors":"Pengya Lei ,&nbsp;Wenkui Yang ,&nbsp;Kaile Wang ,&nbsp;Hailong Nie ,&nbsp;Hua Hou ,&nbsp;Yuhong Zhao","doi":"10.1016/j.ijmecsci.2025.110428","DOIUrl":"10.1016/j.ijmecsci.2025.110428","url":null,"abstract":"<div><div>Regulating temperature and pressure during spark plasma sintering is crucial for optimizing the grain structure and performance of AZ91D magnesium alloys, with grain boundary migration being a critical factor in this process. To address the lack of models that simultaneously consider thermal and mechanical driving forces, this study develops a novel entropy-based non-isothermal phase-field model. The model uniquely couples applied stress with rigid body motion, significantly increasing the initial particle velocity by up to four times compared to traditional approaches. Additionally, the model incorporates temperature evolution through the heat conduction equation and introduces adaptive boundary conditions along with a shared orientation field approach, achieving a computational efficiency improvement of at least 4.6 times in large-scale simulations. Through systematic analysis of grain boundary migration under varying temperature gradients and applied stresses, a critical threshold for sintering parameters is identified: beyond a temperature gradient of 0.3T₀ and an applied stress of 50 MPa, further increases do not significantly enhance sintering efficiency. This work provides a comprehensive framework for understanding and optimizing sintering processes, offering new insights into the coupled effects of thermal and mechanical driving forces on grain boundary dynamics.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"300 ","pages":"Article 110428"},"PeriodicalIF":7.1,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144204872","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":"Optomechanical-coupled tristable oscillations in a nonlinear light-driven system","authors":"Xiang Fang ,&nbsp;Yumei Chen ,&nbsp;Tingfeng Ma ,&nbsp;Jia Lou ,&nbsp;Ji Wang ,&nbsp;Erasmo Carrera ,&nbsp;Kuo-Chih Chuang ,&nbsp;Huimin Wu ,&nbsp;Zhilong Huang","doi":"10.1016/j.ijmecsci.2025.110424","DOIUrl":"10.1016/j.ijmecsci.2025.110424","url":null,"abstract":"<div><div>Responsive liquid crystal elastomers (LCEs), being able to convert ambient energy into sustainable motions, have promoted the development of smart systems recently. However, the design of the LCE system and the corresponding nonlinear dynamics analysis remain a challenging task. In this paper, a novel opto-mechanical coupled nonlinear system composing a light-powered LCE fiber is proposed and its self-excited tristable oscillation is investigated. The LCE fiber is connected to a terminal mass, attached to two mechanical springs on each lateral side, where the springs are arranged as a “X” shape within a fixed frame. To obtain the nonlinear opto-mechanical governing equations, the elastic properties and the light stimuli response of the LCE fiber are combined and a piecewise dynamic coupled model is adopted. By using the iterative numerical method, the dynamic performance of the system is predicted. Once the energy of the illuminated light to the LCE exceeds the required critical threshold, a sustainable tristable oscillation will be triggered that enables the system to maintain a snap-through oscillation between its three equilibrium points and compensate the damping-induced energy loss. Furthermore, a comprehensive analysis of several crucial geometric and material factors that contribute to the behavior of the system is conducted, including energy-related parameters and the broke of symmetry by the gravitational acceleration. Compared to monostable and bistable light-driven LCE oscillators, the tristable one has more complicated motion types and tuning parameters. The investigation of this work can extend the knowledge about the nonlinear opto-mechanical systems having the light-responsive LCEs, which will be useful to the development of intelligent biosensors, soft robots, energy harvester, and smart actuators.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"299 ","pages":"Article 110424"},"PeriodicalIF":7.1,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178338","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":"Freeform surface morphing using honeycomb plates: Gaussian curvature control","authors":"Shenghua Li,&nbsp;Rui Yang,&nbsp;Shiyong Sun,&nbsp;Bin Niu,&nbsp;Runxiang Liu","doi":"10.1016/j.ijmecsci.2025.110420","DOIUrl":"10.1016/j.ijmecsci.2025.110420","url":null,"abstract":"<div><div>Transforming a two-dimensional plane into a three-dimensional surface with a specific Gaussian curvature is a significant engineering challenge. Traditional methods are limited by the conservation of Gaussian curvature, which limits their ability to generate complex surfaces from plane deformation. In this study, we propose an innovative approach to freeform surface morphing using honeycomb panels that utilize the superior design flexibility and bending properties of honeycomb structures to break through traditional limitations. By manipulating the geometric parameters (such as wall thickness, wall length, and height) as well as the boundary conditions, precise control of curvature and Gaussian shape transformation is realized to transform the flat plate into target surfaces with different Gaussian curvatures. A key innovation of this study is the introduction of “curvature product” as a new quantitative descriptor to characterize the honeycomb deformation pattern, which provides a new perspective to understand the deformation behavior of honeycomb structures. Through homogenization analysis, numerical simulation, and experimental validation, we systematically investigate the influence of geometric parameters on the deformation properties. In addition, we reveal the coupling mechanism between bending and torsional stiffnesses in out-of-plane deformation, emphasizing the key role of boundary conditions. This study establishes an effective theoretical framework for the accurate realization of 2D to 3D surface transformation, demonstrates the great potential of honeycomb structures in constructing complex surfaces, and significantly advances the development of Gaussian curvature control techniques.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"300 ","pages":"Article 110420"},"PeriodicalIF":7.1,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144261423","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":"Magnetoelectric coupling in nonlinear three-phase composites: A micromechanical study","authors":"Chien-hong Lin,&nbsp;Yi-Chuan Lin","doi":"10.1016/j.ijmecsci.2025.110425","DOIUrl":"10.1016/j.ijmecsci.2025.110425","url":null,"abstract":"<div><div>This study investigates nonlinear magnetoelectric coupling in three-phase composites with the three most common connectivity types: 0-3, 1-3, and 2-2. Optimizing this coupling is critical for applications in sensors, actuators, and energy harvesting. Existing micromechanical models focus on two-phase composites under linear assumptions, limiting their applicability to nonlinear magnetostrictive and piezoelectric responses. Additionally, most models analyze only one or two connectivity types, lacking a comprehensive approach. To address these gaps, we develop an advanced micromechanical framework based on a simplified unit-cell theory. The model incorporates nonlinear constitutive laws for magnetostrictive and piezoelectric phases, capturing key effects such as hysteresis, magnetoelectric switching, and thermo-magneto-electro-elastic interactions. To handle material nonlinearity, the framework employs an incremental formulation, reducing the problem to a system of linear algebraic equations at each increment, offering a significant advantage over fully nonlinear approaches. Unlike conventional methods, this framework simultaneously models all three connectivity types, offering a unified simulation platform for magnetoelectric composites. Results show that the 1-3 composite type offers the best coupling factor, while the 2-2 configuration exhibits a previously unreported enhancement in magnetoelectric response with increasing temperature. The 0-3 composite reveals a notable discrepancy between unit-cell and Mori-Tanaka micromechanical predictions. Moreover, replacing CoFe₂O₄ with Terfenol-D enhances coupling intensity and reduces hysteresis due to differences in magnetostriction properties, highlighting a key strategy for material optimization. Model predictions align closely with experimental data, outperforming the Mori-Tanaka approach. Furthermore, the study also quantifies the impact of phase volume fraction, prestress, temperature, and loading direction on the overall magnetoelectric coefficient and response. This study provides a robust theoretical foundation for optimizing three-phase magnetoelectric composites.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"299 ","pages":"Article 110425"},"PeriodicalIF":7.1,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144190479","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":"Geometry-related energy damping behavior of additively manufactured NiTi bionic structures","authors":"Dongdong Gu,&nbsp;Jianfeng Sun,&nbsp;Kaijie Lin","doi":"10.1016/j.ijmecsci.2025.110422","DOIUrl":"10.1016/j.ijmecsci.2025.110422","url":null,"abstract":"<div><div>This study investigates the influence of the topological configuration on cyclic energy characteristics of NiTi bionic lattice structures. Inspired by the saddle-shaped exoskeleton of <em>Campylodiscus</em>, bionic lattice structures (BLSs) with varying mean curvatures (<em>K</em>) and gradient modes were designed and fabricated by laser powder bed fusion (LPBF). In contrast to the straight-strut-based body-centered cubic (BCC) structure, BLSs composed of saddle-shaped unit cells exhibited better surface quality and specific damping capacity (<em>SDC</em>). The surface deviation range of the BLSs decreased with increasing <em>K</em> due to enhanced self-supporting capability. Both total specific energy dissipation (<em>SED</em>) and mean <em>SDC</em> of BLSs showed positive correlations to mean curvature, which was attributed to the more uniform stress distribution and increased stress-induced martensitic transformation (SIMT). <em>K</em>_0.7 exhibited the highest total <em>SED</em> of ∼0.543 J/g and a mean <em>SDC</em> of ∼0.644. The <em>SED</em> per cycle was insensitive to gradient modes, while the central gradient (CG) enhanced the total <em>SED</em> by increasing the ultimate strain and the cycle number. Notably, the <em>SDC</em> of the BLSs was structurally dependent at small strains, while it depended on the material properties of NiTi at high strains. The findings could serve as a reference for developing reusable energy absorbers.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"300 ","pages":"Article 110422"},"PeriodicalIF":7.1,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144190141","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":"Self-heating measurements at high temperature under high frequency cyclic loading","authors":"Alexis Mion ,&nbsp;Cédric Doudard ,&nbsp;Florent Mauget ,&nbsp;Jonathan Cormier ,&nbsp;Vincent Roué ,&nbsp;Ahmed Zouari ,&nbsp;Sylvain Calloch","doi":"10.1016/j.ijmecsci.2025.110353","DOIUrl":"10.1016/j.ijmecsci.2025.110353","url":null,"abstract":"<div><div>The self-heating method, which is based on the measurement of temperature evolution of a specimen during cyclic loading, makes it possible to considerably reduce characterization times. The aim of this paper is to propose a test protocol at very high frequency (20 kHz) and very high temperature (up to 1000 °C), as well as an ad hoc analysis method to determine the dissipative sources field responsible for the measured temperature rise. To this end, a method for solving the 1D heat diffusion equation, based on Fourier transforms, is developed. This method is validated using finite element calculations, then applied to experimental results obtained at 850 °C on AM1, a single-crystal nickel-base superalloy, which exhibits a single regime of dissipation.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"299 ","pages":"Article 110353"},"PeriodicalIF":7.1,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154980","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":"Arc change mechanism in Ultrasonic-Magnetic field coaxial hybrid GTAW","authors":"Wenlong Li ,&nbsp;Chuanchuan Jia ,&nbsp;Yihao Gao ,&nbsp;Huichao Jin ,&nbsp;Chao Chen ,&nbsp;Shupeng Wang","doi":"10.1016/j.ijmecsci.2025.110407","DOIUrl":"10.1016/j.ijmecsci.2025.110407","url":null,"abstract":"<div><div>This work presented a new ultrasonic-magnetic-coaxial hybrid gas shielded tungsten arc welding (U-M-GTAW) method by mechanically coupling ultrasonic and magnetic fields on the GTAW torch to overcome the limitations of conventional GTAW in terms of low energy density and shallow penetration. The arc characteristics under different welding modes (DC, AC, pulse, AC-pulse) were studied using a high-speed camera system, and an arc model and acoustic particle motion trajectory were established to elucidate the arc contraction mechanism. Results demonstrated that single and combined energy fields compressed the arc, with ultrasonic fields exhibiting stronger compression on the arc diameter and area, while magnetic fields primarily compressed the arc length. The combined energy field achieved the most significant compression, reducing the arc area by a maximum of 56.0 % and increasing welding voltage by a maximum of 33.2 %. The synergistic effect of ultrasonic and magnetic fields enhanced plasma collision, and the arc must contract to reduce heat dissipation. The energy density of the arc increased, thereby increasing the arc resistance and voltage. The methods of coaxial coupling of ultrasonic and magnetic fields provide a foundation for promoting high-energy density welding technology and applying GTAW technology.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"299 ","pages":"Article 110407"},"PeriodicalIF":7.1,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144155082","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}