International Journal of Mechanical Sciences最新文献

{"title":"Mechanical model for two-dimensional ultrasonic-assisted grinding of unidirectional Cf/SiC composites","authors":"Zhenyan Duan ,&nbsp;Tao Chen ,&nbsp;Yuhao Suo ,&nbsp;Haohui Shi ,&nbsp;Junpeng Ye","doi":"10.1016/j.ijmecsci.2025.110419","DOIUrl":"10.1016/j.ijmecsci.2025.110419","url":null,"abstract":"<div><div>Two-dimensional ultrasonic-assisted grinding (2D-UAG) is a highly efficient process for brittle materials. Compared to conventional grinding (CG) and one-dimensional ultrasonic-assisted grinding (1D-UAG), the surface quality of workpieces can be further improved. Unidirectional carbon-fiber-reinforced silicon carbide composites (UD-C_f/SiCs) have a wide range of applications in engineering. However, the existing mechanical models developed for the machining of C_f/SiCs have various limitations, especially the inability to reflect the transient force information. In this work, a dynamic force prediction model is developed for the 2D-UAG of the C_f/SiCs. In the modelling process, the micro-morphology of the grinding wheel was first characterized. Secondly, the cutting force of a single grit was obtained based on the fiber fracture theory and the energy conservation law. Finally, considering the grain movement in the 2D-UAG, a novel force decomposition and synthesis algorithm was used to calculate the total force. The validation results showed that the maximum predicted error of the model for the resultant force <em>F_s</em> is 14.86 % and the average value is 7.36 %. The predicted boundary values and mean values of the fractional forces <em>F</em>_n and <em>F</em>_t are also in good agreement with the experimental values. In addition, the fibers have a large influence on the fluctuation of the force value due to the suppression of transverse crack extension. The order of influence is Perpendicular &gt; Transverse &gt; Longitudinal.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"299 ","pages":"Article 110419"},"PeriodicalIF":7.1,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144185721","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":"Design of quasi-zero-stiffness metamaterials with ultra-wideband vibration isolation performance","authors":"Lingbo Li ,&nbsp;Fan Yang ,&nbsp;Sanfeng Liu ,&nbsp;Zhengmiao Guo ,&nbsp;Dong Han ,&nbsp;Yi Xia ,&nbsp;Lihua Wang ,&nbsp;Hualin Fan","doi":"10.1016/j.ijmecsci.2025.110440","DOIUrl":"10.1016/j.ijmecsci.2025.110440","url":null,"abstract":"<div><div>Traditional single-function lightweight structure excels in a specific application scenario such as energy absorption, but is difficult to meet the multi-function requirements of the complex working environment for the high-end equipments. In this paper, a novel quasi-zero stiffness (QZS) metamaterial is proposed based on the topological design combining the positive and negative stiffness units, to achieve the multifunction integration of vibration attenuation and energy absorption. The quasi-static compression tests and shaker vibration isolation tests were carried out on the specimens prepared by stereolithography (SLA) and selective laser sintering (SLS) additive manufacturing techniques. The effects of structural parameters and base materials on the mechanical and vibration isolation properties of QZS metamaterials were systematically investigated. The proposed QZS metamaterial can realize the ultra-wideband vibration damping effect with the isolation band as wide as 5980 Hz, and the overall deformation of the structure can be adjusted by both mechanical load and temperature programming. In addition, the proposed QZS metamaterials have excellent repeatable energy absorption properties, maintaining 80 % load carrying capacity and 92 % specific energy absorption (SEA) after six loading cycles. Therefore, the QZS metamaterial can simultaneously achieve high load-bearing capacity and excellent vibration isolation performance, providing a new pathway to build multifunctional integrated lightweight structures.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"300 ","pages":"Article 110440"},"PeriodicalIF":7.1,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144184792","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":"Syndiotactic chiral metamaterial absorber for low-frequency broadband vibration reduction","authors":"Shenghao Xu,&nbsp;Kyunglae Gu,&nbsp;Junhong Park","doi":"10.1016/j.ijmecsci.2025.110435","DOIUrl":"10.1016/j.ijmecsci.2025.110435","url":null,"abstract":"<div><div>The compression-twist coupling effect of chiral metamaterials provides new insights into the development of broadband absorbers. This study proposes a novel syndiotactic chiral metamaterial absorber (SCMA), which combines a syndiotactic chiral metamaterial frame with twisted beams. The proposed SCMA leverages the coupled vibration and inertial amplification effects, which allows to suppress the low-frequency broadband vibration. By adjusting the twist angles of the beams, the vibration suppression band and the maximum amplitude can be optimized. A three-dimensional (3D) elastic wave model and a discrete oscillator model are then developed to study the modal characteristics and damping mechanism of the SCMA. Afterwards, the impacts of the ligament angles and the slenderness ratio of the chiral metamaterial frame on the vibration suppression bandwidth are systematically evaluated. The obtained results show that, compared with conventional linear vibration absorbers (LVA), the SCMA reduces the amplitude by 24.8 % and expands the vibration suppression bandwidth by a factor of 10. The experimental results are consistent with the predictions of the theoretical models. The high damping performance and significantly broadened attenuation bandwidth of the proposed SCMA provide a high potential for enhancing the structural integrity of machinery.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"300 ","pages":"Article 110435"},"PeriodicalIF":7.1,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144184791","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 stress-based criterion for interpreting size-dependent ice debonding behavior","authors":"Tianhui Hao ,&nbsp;Lin Zhao ,&nbsp;Yongpeng Lei ,&nbsp;Xinshu Zou ,&nbsp;Jifeng Zhang ,&nbsp;Haotian Guo","doi":"10.1016/j.ijmecsci.2025.110436","DOIUrl":"10.1016/j.ijmecsci.2025.110436","url":null,"abstract":"<div><div>Ice accumulation has driven the demand for low ice adhesion surfaces, but inadequate understanding of the debonding mechanism has hindered progress, especially as size dependence further complicates analysis and undermines evaluation reliability. Although a mainstream view attributes the behavior to toughness-controlled debonding, a universal mechanism applicable to continuous size variations remains elusive. In this study, we developed a continuous shear de-icing model, revealed the non-uniform stress distribution at the ice-substrate interface, introduced a stress-based criterion offering a novel perspective, and synthesized a series of two-component gel coatings for verification. Our findings show that the interfacial shear stress decreases with distance from the loading surface, causing the de-icing force to approach an asymptotic limit. We also derived a de-icing force prediction equation as a function of ice length, established expressions for the critical length and asymptotic force, and re-evaluated the influence of key variables. To ensure consistency across the various studies reported, an adaptive evaluation method based on the intrinsic strength concept was introduced. Additionally, an apparent strength correction factor and a graphical program were developed, significantly enhancing transferability among different test specimens. This study provides a theoretical framework for the design and evaluation of icephobic coatings and offers new insights into optimizing de-icing strategies for practical applications.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"300 ","pages":"Article 110436"},"PeriodicalIF":7.1,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178479","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":"Microscale model for fiber breaking displacement in ceramic-matrix composites","authors":"Longbiao Li","doi":"10.1016/j.ijmecsci.2025.110438","DOIUrl":"10.1016/j.ijmecsci.2025.110438","url":null,"abstract":"<div><div>In this paper, the fiber breaking displacements (FBDs) of ceramic-matrix composites (CMCs) under tensile loading were systematically investigated using a micromechanical approach. The micro strain fields of fibers before and after breaking were analyzed for five different damage states, i.e., isolated fiber breakage away from matrix cracking, as well as fiber breakage surrounding single, long, medium, and short multiple cracks. The FBDs and corresponding fiber slip lengths associated with different damage states were determined. Effects of stress levels, constitutive properties, damage state and fiber breakage location on FBDs and fiber sliding were comprehensively analyzed. Relationships between FBDs, fiber slip length, stress levels and damage states were established. Experimental FBDs of fiber breakages away from matrix crack or at the center of medium/short matrix crack spacing in unidirectional SiC/SiC composite under <em>in-situ</em> tensile loading were predicted using the developed microscale models. The FBDs increase with applied stress and decrease with interface shear stress. When the fiber breakage position away from the matrix cracking plane, the FBD decreases for single matrix cracking; when the fiber breakage position away from the matrix cracking center, the FBD remains constant for long matrix cracks, decreases for mediums matrix cracks, and increases for short matrix cracks.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"299 ","pages":"Article 110438"},"PeriodicalIF":7.1,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144185720","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":"Elastic constants and material stability analysis of orthotropic titanium-based metal foams","authors":"Ignacio González Gómez ,&nbsp;Yerko Espinosa Lorca ,&nbsp;Wilmer Velilla-Díaz ,&nbsp;Alejandro Pacheco-Sanjuán","doi":"10.1016/j.ijmecsci.2025.110431","DOIUrl":"10.1016/j.ijmecsci.2025.110431","url":null,"abstract":"<div><div>Metallic foams have emerged as promising materials for mitigating the adverse effects of implants on surrounding tissues by replicating the stiffness and structural symmetry of bone. In current fabrication technologies, porosity is widely recognized as the primary topological factor for tuning stiffness and strength. However, as an isotropic parameter, porosity inadequately captures the influence of mesoscale structures on the elastic anisotropy of metallic foams. This study aims to address these limitations by investigating the role of porosity as a topological descriptor in determining elastic constants for anisotropic metallic foams. The research presents a methodology for determining the effective macroscopic elastic constants of orthotropic, titanium-based metal foams across varying porosities, ranging from 5% to 65%, which aligns with the pore size distributions of specimens fabricated via powder metallurgy. Employing genetic algorithm optimization based on Voronoi tessellations, 3D randomized cubic representative volume elements (RVEs) were generated to replicate pore statistics obtained from 2D μCT reconstructions of real foams. Finite element simulations were conducted on these RVEs, including tensile and shear tests, to quantify their mechanical response. Results reveal a general reduction in Young’s modulus, shear modulus, and bulk modulus as porosity increases. Notably, elastic constant dispersion significantly widened at higher porosity levels, with Poisson’s ratio displaying substantial variation in the range of -0.01 &lt; ν &lt; 0.37 at 65% porosity. Zener ratios indicated near-isotropic behavior up to 30% porosity, but microstructural stability sharply declined beyond 65%, as reflected by nearly zero determinants of the stiffness tensors. These findings underscore the critical sensitivity of elastic properties, particularly Poisson’s ratios, to microstructural architecture, providing insights into potential instabilities in highly porous, bone-like cellular structures.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"299 ","pages":"Article 110431"},"PeriodicalIF":7.1,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144185714","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":"MD- and ML-based size-parameter calibration for the non-classical continuum theories","authors":"Cancan Liu ,&nbsp;Jiangong Yu ,&nbsp;Longtao Xie ,&nbsp;Chaofeng Lü ,&nbsp;Vladimir Babeshko ,&nbsp;Chuanzeng Zhang","doi":"10.1016/j.ijmecsci.2025.110376","DOIUrl":"10.1016/j.ijmecsci.2025.110376","url":null,"abstract":"<div><div>The accurate determination of the size-parameters is crucial for the application of the non-classical continuum theory to characterize the size-effects. This study takes into account of the size-effects and multiple influencing factors and utilizes the molecular dynamics (MD) simulations in conjunction with the machine learning (ML) technique for the precise calibration of the size-parameters required in the non-classical continuum theories. Firstly, theoretical solutions for the elastic wave dispersion relations within the frameworks of the nonlocal elasticity and nonlocal strain-gradient models are derived using the analytical integral Legendre polynomial method. Subsequently, MD simulations are performed to determine the group velocity dispersion relations of the Lamb and SH waves in aluminum plates of varying thickness. Finally, the nonlinear relationships between the guided wave group velocities and the size-parameters are established by the ML technique based on the neural network model. The present study reveals that the size-effects of the elastic wave propagation are closely related to the wavelength, the guided wave mode, and the thickness of the plates. The calibrated nonlocal elasticity theory can predict the guided wave group velocity only within a limited range of the nanoplate thickness. In contrast, the calibrated nonlocal strain-gradient theory demonstrates an excellent performance across all ranges of the nanoplate thickness.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"299 ","pages":"Article 110376"},"PeriodicalIF":7.1,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144185722","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 fast food-freezing temperature estimation framework using optimally located sensors","authors":"Felipe Galarce ,&nbsp;Diego R. Rivera ,&nbsp;Douglas R.Q. Pacheco ,&nbsp;Alfonso Caiazzo ,&nbsp;Ernesto Castillo","doi":"10.1016/j.ijmecsci.2025.110374","DOIUrl":"10.1016/j.ijmecsci.2025.110374","url":null,"abstract":"<div><div>This article presents and assesses a framework for estimating temperature fields in real time for food-freezing applications, significantly reducing computational load while ensuring accurate temperature monitoring, which represents a promising technological tool for optimizing and controlling food engineering processes. The strategy is based on (i) a mathematical model of a convection-dominated problem coupling thermal convection and turbulence, and (ii) a least-squares approach for solving the inverse data assimilation problem, regularized by projecting the governing dynamics onto a reduced-order model (ROM). The unsteady freezing process considers a salmon slice in a freezer cabinet, modeled with temperature-dependent thermophysical properties. The forward problem is approximated using a third-order WENO finite volume solver, including an optimized second-order backward scheme for time discretization. We employ our data assimilation framework to reconstruct the temperature field based on a limited number of sensors and to estimate temperature distributions within frozen food. Sensor placement is optimized using a novel greedy algorithm, which maximizes the observability of the reduced-order dynamics for a fixed set of sensors. The proposed approach allows efficient extrapolation from external sensor measurements to the internal temperature of the food under realistic turbulent flow conditions, which is crucial for maintaining food quality.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"299 ","pages":"Article 110374"},"PeriodicalIF":7.1,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154981","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":"H∞ optimization of a hybrid multiple-delayed delayed resonator vibration absorber","authors":"Yifan Liu ,&nbsp;Bo Yan ,&nbsp;Li Cheng","doi":"10.1016/j.ijmecsci.2025.110381","DOIUrl":"10.1016/j.ijmecsci.2025.110381","url":null,"abstract":"<div><div>Delayed resonator (DR) as an active vibration absorber can achieve a zero antiresonance point of the primary structure at a given frequency by manipulating the loop delay, yielding the so-called complete vibration suppression. Achieving zero antiresonance, however, is usually penalized by the significantly raised resonance peaks, risking structural safety. Here, we aim to limit the resonance while achieving zero antiresonance, leading to the <span><math><msub><mrow><mi>H</mi></mrow><mrow><mi>∞</mi></mrow></msub></math></span> optimization problem. To simplify analyses, we distinctively incorporate the primary structure-based feedback force into the total control forces of the DR and activate them only when residual vibrations occur. This reduces parametric coupling so that resonance peaks can be reduced without affecting zero antiresonance. Given the benefits of tuning delay from the DR concept itself, the states of the primary structure are also delayed in the feedback loop for additional performance enhancement, finally creating the so-called hybrid multiple-delayed DR. By analyzing system stability, characteristic spectrum, and frequency response, we show that pursuing an extremum reduction of resonance peaks can conflict with operable complete vibration suppression, thus requiring a trade-off between the two. Furthermore, by properly optimizing control parameters, both tasks can be significantly enhanced simultaneously. This work introduces a new design framework to enhance vibration suppression in terms of both resonance and antiresonance.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"300 ","pages":"Article 110381"},"PeriodicalIF":7.1,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144167670","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}