International Journal of Mechanical Sciences最新文献

{"title":"Modeling of multi-scale material removal in centrifugal superfinishing","authors":"Xingfu Wang ,&nbsp;Xiuhong Li ,&nbsp;Wenhui Li ,&nbsp;Xunzheng Zhai","doi":"10.1016/j.ijmecsci.2025.110091","DOIUrl":"10.1016/j.ijmecsci.2025.110091","url":null,"abstract":"<div><div>Centrifugal superfinishing (CSF) is a non-conventional mass finishing technology that achieves nano-level surface roughness on workpieces. However, due to the complexity and multi-scale characteristics, there is limited in-depth research on the effects of different processing parameters on finishing efficiency and surface quality. To address this, a multi-scale material removal theoretical model based on Hertz contact and fluid dynamics theory was developed. The Hertz contact theory is employed to describe the effect of abrasives on material removal in the microscopic process, while the fluid dynamics theory is utilized to analyze the relationship between macroscopic flow stress <em>p_d</em>, relative velocity <em>v</em>, and media velocity flow field. Additionally, the intrinsic relationship between macroscopic flow stress <em>p_d</em> and microscopic contact stress <em>p_n</em> is analyzed based on the force characteristics of individual dry medium. Different parameters were considered in the model, including abrasive size d_a, polishing paste ratio <em>c_a</em>, dry media size <em>d_p</em>, revolution speed N, and loading amount <em>c_p</em>. A series of simulation and finishing experiments were conducted to validate this model and the mechanisms of material removal and surface roughness evolution were revealed by microscopic morphology features and contact stress distributions. The results indicate that the effects of abrasive size d_a and polishing paste ratio <em>c_a</em> on MRR and surface roughness are primarily reflected in the Hertz contact depth h_a and the number of active abrasives at the microscopic scale. In contrast, the effects of dry media size <em>d_p</em>, revolution speed N, and loading amount <em>c_p</em> on MRR and surface roughness are associated with the normal contact force <em>F_N</em> and the number of contacts <em>N_c</em> at the microscopic scale, as well as flow stress <em>p_d</em> and contact probability at the macroscopic scale. Additionally, these parameters also influence the relative velocity. The developed model provides a theoretical reference for optimizing the CSF technology.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"290 ","pages":"Article 110091"},"PeriodicalIF":7.1,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143528944","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":"Tip-based up-milling for smooth microchannel structures using Lissajous trajectories","authors":"Bo Xue ,&nbsp;Jiawei Bian ,&nbsp;Hang Yao ,&nbsp;Fangjian Hong ,&nbsp;Xing Su","doi":"10.1016/j.ijmecsci.2025.110093","DOIUrl":"10.1016/j.ijmecsci.2025.110093","url":null,"abstract":"<div><div>Microfluidic channels offer significant advantages and have broad application potential in fields such as biomedicine and materials science. However, machining microchannels with dimensions on the order of tens of micrometers presents challenges related to machining quality and cost. Therefore, developing cost-effective and low-burr micromachining processes is crucial for advancing the application of microchannel structures. This paper proposes a method for fabricating microchannel structures using tip-based micro-milling with Lissajous trajectories, featuring a frequency ratio of 2. Leveraging the characteristics of Lissajous trajectories, the novelty of this method lies in its ability to achieve up-milling on both sidewalls of the channel in a single pass, without the occurrence of down-milling, thereby minimizing burr formation. By varying the phase angle to adjust the shape of the Lissajous trajectory, microchannels with different machining qualities are produced. The results reveal that material residue is the primary factor degrading machining quality, particularly in terms of sidewall smoothness and bottom surface roughness. The material residue caused by tip cutting is initially formed during the forward revolving movement of the tip (cutting path) and is subsequently reprocessed during the backward movement (non-cutting path). Numerical simulations, combined with experimental results, are performed to investigate the distribution of material residue on the microchannel bottom under different trajectories. Finite element (FE) analysis is used to simulate cutting processes with time-varying uncut chip thickness and cutting angles in various Lissajous trajectories, focusing on characterizing the primary shear zone. The optimal phase range of the Lissajous trajectory, between 45° and 60°, is identified, within which microchannel structures with widths of 10 μm and 20 μm are fabricated. The channel sidewalls exhibited improved smoothness, and the bottom surface roughness was minimized to <em>S_a</em>=20.4 nm.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"290 ","pages":"Article 110093"},"PeriodicalIF":7.1,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529047","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":"Monolithic approaches to transient thermo-mechanical interaction in nonlinear rotor systems","authors":"Zeyuan Chang ,&nbsp;Lei Hou ,&nbsp;Rongzhou Lin ,&nbsp;Yushu Chen ,&nbsp;Pierangelo Masarati","doi":"10.1016/j.ijmecsci.2025.110066","DOIUrl":"10.1016/j.ijmecsci.2025.110066","url":null,"abstract":"<div><div>Aero-engine rotor systems may experience severe thermally-induced failures during start-up acceleration, maneuvering actions, or other harsh operational conditions, creating a significant demand for accurately analyzing transient thermo-mechanical coupling characteristics. In traditional partitioned approaches, mechanical and thermal fields are solved separately, considering the transient process being weakly coupled in rotor systems. This paper proposes accurate and general monolithic approaches for transient thermo-mechanical interaction analysis in nonlinear rotor systems, overcoming the limitation of communication between partitions for inevitable result distortion. Coupled governing equations are constructed as general second-order ordinary differential equations based on motion and heat balance equations. Monolithic approaches are formulated using the generalized-<span><math><mi>α</mi></math></span> and linear two-step numerical integration methods. The resulting nonlinear problems are solved using the Newton–Raphson scheme with a fully coupled Jacobian matrix. The accuracy, computational time, and sensitivity to algorithm coefficients of the monolithic approaches are evaluated by numerical experiments. The results indicate that thermo-mechanical problems during transients are strongly coupled necessitating simultaneous solution. Moreover, the monolithic approaches demonstrate excellent generality when applied to a high-dimensional dual-rotor system, capturing rapid and intense transient thermo-mechanical interactions. This capability can help optimize the design of aero-engine rotor systems under complex operational conditions.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"290 ","pages":"Article 110066"},"PeriodicalIF":7.1,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519808","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":"Nonlinear forced vibration and synchronization behavior of pipe-in-pipe system","authors":"Jinming Fan,&nbsp;Yinghui Li,&nbsp;Jie Yang","doi":"10.1016/j.ijmecsci.2025.110089","DOIUrl":"10.1016/j.ijmecsci.2025.110089","url":null,"abstract":"<div><div>In this paper, the nonlinear forced vibration of a fluid-conveying pipe-in-pipe (PIP) system is studied. The dynamic model of PIP system considering geometric nonlinearity and insulation nonlinearity is presented. The Galerkin method, Runge-Kutta method and pseudo-circular arc extension technique are employed to solve the equations. The effects of flow velocity, linear stiffness, nonlinear stiffness, and other factors on the buckling path, frequency and response are studied. The focus of the research is on the synchronization behavior of the inner and outer pipes, including the synchronization of dynamic characteristics and the synchronization of vibration directions. The results show that the PIP system exhibits single-frequency periodic or quasi-periodic motions, and the bifurcations on the inner and outer pipes are synchronous. The synchronization of vibration direction is divided into forward and reverse synchronization vibration, and their ranges and the conversion mechanism are discussed. Additionally, cases are identified where the first-order resonance peak covers or partially covers the second-order resonance peak. In addition, the multi-valued intervals are analyzed, and the formation mechanisms of single-valued areas, double-valued areas, and triple-valued areas are classified. This study reveals some important characteristics of the PIP system, which are of great significance for the design and further research of such systems.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"291 ","pages":"Article 110089"},"PeriodicalIF":7.1,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619985","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":"Designing deformation texture in non-oriented electrical steel for enhanced magnetic properties","authors":"Masoud Sistaninia ,&nbsp;Peter Raninger ,&nbsp;Herbert Kreuzer ,&nbsp;Petri Prevedel ,&nbsp;Thomas Antretter","doi":"10.1016/j.ijmecsci.2025.110090","DOIUrl":"10.1016/j.ijmecsci.2025.110090","url":null,"abstract":"<div><div>Non-grain-oriented (NO) electrical steel is extensively used in electrical machines with rotating magnetic fields. Cold rolling plays a pivotal role in the production of NO electrical steels, where controlled processing enhances their magnetic properties. This study analyzes the evolution of texture and microstructure during the processing of 3.2 wt.% silicon NO electrical steel through conventional manufacturing routes, utilizing ultra-high-resolution Electron Backscatter Diffraction (EBSD) measurements. The influence of cold rolling deformation degree on texture evolution is investigated through two cold-rolling experiments. Results show that magnetically favorable textures after final annealing are achievable only under specific cold rolling conditions, highlighting the necessity of designing optimized rolling processes. To address the challenges associated with experimental process design, a novel multiscale numerical approach is developed, integrating macroscale simulations with microscale crystal plasticity finite element simulations tailored for polycrystalline NO electrical steels.</div><div>This simulation framework enables an in-depth analysis of deformed texture evolution across the sheet thickness and supports the design of cold-rolling processes to identify conditions that promote favorable cube orientations ({0 0 1} 〈1 0 0〉). The formation mechanism of cube texture via the inclined cold-rolling method is numerically investigated, revealing that this method can effectively develop cube texture across different thickness regions when appropriate rolling inclination angles and deformation degrees are applied. The optimal rolling conditions derived in this study provide a pathway to significantly enhance the magnetic properties of NO electrical steels, contributing to the development of energy-efficient electrical machines and sustainable energy technologies.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"290 ","pages":"Article 110090"},"PeriodicalIF":7.1,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143527398","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":"In-plane mechanical behavior of tri-chiral and anti-trichiral auxetic cellular structures","authors":"Anurag Gupta,&nbsp;Shubham Sharma,&nbsp;Rohit Raju Madke,&nbsp;Rajib Chowdhury","doi":"10.1016/j.ijmecsci.2025.110054","DOIUrl":"10.1016/j.ijmecsci.2025.110054","url":null,"abstract":"<div><div>Auxetic cellular structures, characterized by their counterintuitive negative Poisson’s ratio (NPR), have attracted significant attention due to their unique mechanical properties. Their potential for improved energy absorption capabilities makes them promising candidates for applications requiring enhanced resistance to compressive forces. This paper investigates the mechanical response of a specific class of auxetic cellular structures known as chiral auxetics under quasi-static in-plane compressive loading. The study focuses on two distinct chiral structures: tri-chiral and anti-trichiral. A numerical simulation is conducted to evaluate their energy absorption capacities. Numerical results are validated by conducting quasi-static compressive testing of tri-chiral and anti-trichiral auxetic cellular structures fabricated through fused deposition modeling (FDM) 3D printing technique by tuning the printing parameters using Taguchi’s design of experiment approach. Furthermore, parametric investigations are performed to examine the effect of circular node radius and ligament thickness on their energy absorption capacity. The results confirm that tri-chiral auxetic structures shows better energy absorption performance compared to anti-trichiral auxetic structures at the same relative density. The parametric analysis also reveals that variations in node radius and ligament thickness significantly influence the energy absorption performance of these auxetic cellular structures. Finally, the application of tri-chiral auxetics are explored in protective padding structures. The quasi-static experimental testing of the pad structure is conducted to verify the simulated results, while an additional simulation examines localized deformation under constant punching from a rigid hemispherical punch. This incorporation of chiral auxetics in padding structures confirms their applicability in practical applications, demonstrating its potential for broader usage in similar contexts.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"289 ","pages":"Article 110054"},"PeriodicalIF":7.1,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474603","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":"An improved SPH for simulating SLM process with recoil pressure","authors":"Ting Long ,&nbsp;Keyan Ning","doi":"10.1016/j.ijmecsci.2025.110060","DOIUrl":"10.1016/j.ijmecsci.2025.110060","url":null,"abstract":"<div><div>The numerical simulation can predict and analyze the physical phenomena in the selective laser melting (SLM) process, providing reference for the selection of SLM process parameters. The smoothed particle hydrodynamics (SPH) method with high fidelity numerical simulation can be used as a tool to further study the SLM process. In this paper, an improved SPH method is proposed to simulate the molten pool flow in SLM process with recoil pressure caused by metal evaporation. In the improved SPH model, an improved kernel gradient correction (KGC) technique and an improved surface tension model are used to improve the computational accuracy, and a novel heat source applying method is proposed to improve the accuracy of applying the heat source model, and an improved material model are proposed to consider the process of metal evaporation. In the present heat source applying method, an improved method for determining the surface SPH particles interacting with laser is developed and a new ray reflection model is proposed to improve the accuracy of applying the heat source. And the recoil pressure model is applied to model the recoil pressure. The accuracy and effectiveness of the SPH model to simulate SLM process are verified by a series of numerical examples. The results show that the improved SPH model is effective in modeling the molten pool flow under recoil pressure.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"289 ","pages":"Article 110060"},"PeriodicalIF":7.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic interaction of thixotropy and inertia in a C-shaped serpentine channel","authors":"Seon Yeop Jung ,&nbsp;Jun Dong Park ,&nbsp;Jo Eun Park ,&nbsp;Jaewook Nam ,&nbsp;Tae Gon Kang","doi":"10.1016/j.ijmecsci.2025.110068","DOIUrl":"10.1016/j.ijmecsci.2025.110068","url":null,"abstract":"<div><div>Thixotropy, a property commonly observed in industrial fluids, significantly influences flow and mixing behavior in micromixers. However, its interaction with fluid inertia remains poorly explored. This study examines the behavior of a thixotropic fluid in a C-shaped serpentine channel, focusing on the complex and poorly understood interaction between thixotropy and inertia. A structure-kinetics model is employed to capture the microstructural changes of the thixotropic fluid. We numerically analyze flow and mixing behavior influenced by the Reynolds and the thixotropy numbers, solving coupled continuity, momentum, and structure evolution equations. Thixotropy has a minimal impact on mixing in the creeping flow regime. In the non-creeping flow regime, however, it enhances rotational flow and mixing by reducing viscosity through structural breakdown and increasing fluid inertia. Our findings demonstrate that in the serpentine channel geometry, thixotropy can enhance mixing performance in shorter channels and with lower energy consumption by interacting synergistically with fluid inertia. This highlights the critical role of rheological properties in the design and operation of micro- and macro-scale mixers, with potential applications in biotechnology, pharmaceuticals, food processing, and manufacturing processes involving thixotropic materials.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"289 ","pages":"Article 110068"},"PeriodicalIF":7.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453871","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":"Constitutive modeling of shear thickening fluid using continuum mechanics","authors":"Jinyu Yang ,&nbsp;Junshuo Zhang ,&nbsp;Bochao Wang ,&nbsp;Xinglong Gong","doi":"10.1016/j.ijmecsci.2025.110057","DOIUrl":"10.1016/j.ijmecsci.2025.110057","url":null,"abstract":"<div><div>Shear thickening fluid (STF) exhibits intelligent rheological properties associated with its strain rates, demonstrating excellent viscosity thickening and thinning effects. These properties effectively enhance the performance of STF utilized in impact protection. However, the thickening effect has posed significant difficulties in the theoretical study of STF, resulting in a lack of specific constitutive models and experimental verification. To address this issue, we perform systematic rheological tests across a wide range of loading rates, thoroughly exploring the intelligent rheological responses of STF. Based on the mechanical behavior, we utilize an innovative approach for STF to develop a novel shear-thickening constitutive model within a framework of continuum mechanics, contributing to its theoretical understanding and providing guidance for applications. Given the nonlinearity of the constitutive equations, we present a corresponding numerical implementation approach to efficiently obtain solutions, and subsequently conduct parameter identification using this approach. The significant overlap between the experimental results and model predictions indicates that the new model accurately captures the intelligent rheological behaviors of STF. Furthermore, we design a series of simulations as anti-impact application scenarios of the STF-based composite, which activates a viscosity thickening effect to deliver strong resistance during high-speed impacts. Interestingly, unlike constant-viscosity materials, the STF-based composite exhibits a unique thinning effect and consumes very little energy during low-speed impacts. Consequently, when used as wearable equipment, it not only effectively weakens high-speed impacts, but also facilitates unrestricted movement during low-speed activities. These findings offer valuable guidance for the designs and applications of STF-based products.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"289 ","pages":"Article 110057"},"PeriodicalIF":7.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464003","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":"Phase-field simulation on grain-size dependent fracture of cyclically loaded NiTi-SMA","authors":"Junyuan Xiong ,&nbsp;Bo Xu ,&nbsp;Jiachen Hu ,&nbsp;Guozheng Kang","doi":"10.1016/j.ijmecsci.2025.110041","DOIUrl":"10.1016/j.ijmecsci.2025.110041","url":null,"abstract":"<div><div>Based on crystal plasticity theory, a new non-isothermal fracture phase field model was proposed, incorporating various inelastic deformation mechanisms in NiTi shape memory alloy (SMA). The crack propagation of NiTi-SMA under cyclic loading was simulated by addressing its one-way shape memory effect (OWSME) and super-elasticity (SE). The effects of stress-induced martensite transformation (MT), temperature-induced MT, martensite reorientation (MR), and plastic deformation on the crack propagation of NiTi-SMA were examined. The simulated results indicate that dissipation caused by MT, MR, and plastic deformation effectively reduces the crack propagation rate. The fracture mode (crack propagation path) of NiTi-SMA is strongly correlated with the distribution of grain boundaries. As the grain size increases, the crack propagation rate in the super-elastic NiTi systems increases, and the fracture mode gradually transitions from the transgranular fracture to the intergranular one. However, the crack propagation path in the OWSME NiTi system exhibits independence on grain size, and the crack propagation rate within the OWSME system is slightly lower than that in the SE system. The difference of fracture behavior between the super-elastic NiTi system and shape memory NiTi system can be explained from the perspective of microstructure evolution.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"289 ","pages":"Article 110041"},"PeriodicalIF":7.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444668","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}