Tribology Letters最新文献_第5页

Shear Thinning and Stress-Dependent Viscosity Activation Volumes: Combining Eyring and Carreau 剪切减薄和应力依赖性粘度激活体积：结合环和卡罗

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2025-07-23 DOI: 10.1007/s11249-025-02047-3

Nicholas Hopper, Dennis W. Bennett, Rosa M. Espinosa-Marzal, Wilfred Tysoe

{"title":"Shear Thinning and Stress-Dependent Viscosity Activation Volumes: Combining Eyring and Carreau","authors":"Nicholas Hopper, Dennis W. Bennett, Rosa M. Espinosa-Marzal, Wilfred Tysoe","doi":"10.1007/s11249-025-02047-3","DOIUrl":"10.1007/s11249-025-02047-3","url":null,"abstract":"<div><p>The viscosity of fluids and their dependence on shear rate, known as shear thinning, plays a critical role in applications ranging from lubricants and coatings to biomedical and food-processing industries. Traditional models such as the Carreau and Eyring theories offer competing explanations for shear-thinning behavior. The Carreau model attributes viscosity reduction to molecular distortions, while the Eyring model describes shear thinning as a stress-induced transition over an activation energy barrier. This work proposes an extended-Eyring model that incorporates stress-dependent activation volumes, bridging key aspects of both theories. In modifying transition-state theory by using an Evans-Polanyi perturbation analysis, we derive a generalized viscosity equation that accounts for the molecular-scale rearrangements governing fluid flow. The model is validated against computational and experimental data, including shear-thinning behavior of pure squalane and polyethylene oxide (PEO) aqueous solutions. Comparative analysis with Carreau-Yasuda and conventional Eyring models demonstrates excellent accuracy in predicting viscosity trends over a wide range of shear rates. The introduction of stress-dependent activation volumes provides a description of molecular exchange kinetics accounting for structural reorganization under shear. These findings offer a unified framework for modeling shear thinning and have broad implications for designing advanced lubricants, polymer solutions, and complex fluids with tailored flow properties.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"73 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11249-025-02047-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring Abrasion Pattern Formation with Sliding Contact Resonance: What Timescale Determines Periodic Spacing? 用滑动接触共振探索磨损模式的形成：什么时间尺度决定周期间隔？

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2025-07-21 DOI: 10.1007/s11249-025-02038-4

Shintaro Hatanaka, Hikaru Okubo, Kentaro Hanzawa, Ryo Kajiki, Ken Yamaguchi, Ken Nakano

引用次数: 0

The Effect of Hardness and Surface Roughness of Elastomer on Friction Between Shoe Soles and Particle-Contaminated Floors 弹性体硬度和表面粗糙度对鞋底与含颗粒地板摩擦的影响

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2025-07-19 DOI: 10.1007/s11249-025-02046-4

Michal Žůrek, David Markusík, David Rebenda, Lukáš Kalina, Martin Hartl, Martin Vrbka

{"title":"The Effect of Hardness and Surface Roughness of Elastomer on Friction Between Shoe Soles and Particle-Contaminated Floors","authors":"Michal Žůrek, David Markusík, David Rebenda, Lukáš Kalina, Martin Hartl, Martin Vrbka","doi":"10.1007/s11249-025-02046-4","DOIUrl":"10.1007/s11249-025-02046-4","url":null,"abstract":"<div><p>Nearly one third of workplace injuries results from slip- and trip-induced falls. Solid particles are among the most common floor contaminants in both occupational and outdoor environments, reducing shoe–floor friction and increasing slip risk. This study investigates how rubber hardness and surface roughness affect the frictional behaviour of shoe soles on smooth, particle-contaminated floors. Coefficient of friction (COF) measurements and post-test surface wear analyses were conducted using nitrile rubbers with hardness between 57.9 and 84.0 ShA and varied surface roughness. Samples were slid against smooth epoxy flooring in a pin-on-plate test simulating the heel-strike phase of walking. The floor was either clean or uniformly covered with corundum particles (40–50 µm, 120–140 µm, or 280–315 µm). On clean floors, increasing rubber hardness and roughness significantly decreased COF (p < 0.0001) due to reduced real contact area. Under contaminated conditions, softer and rougher rubbers yielded higher COF values (<i>p</i> < 0.0001). Higher COF correlated with greater floor wear, showing long scratches and grooves, suggesting slip occurs mainly at the particle–floor interface. Rubber hardness and surface roughness primarily influence the strength of the particle–elastomer interface; greater particle–elastomer strength suppresses particle rolling and thereby leads to an increase in COF. These findings indicate that, on particle-contaminated smooth floors, slip resistance is governed more by particle–floor interactions than by rubber adhesion. Increasing outsole roughness and reducing hardness can help mitigate the adverse effects of particle rolling within the contact area and improve the frictional performance of the outsole.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"73 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11249-025-02046-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Soft Climbing Robot Based on Smart Wood with Switchable Adhesion 基于可切换黏附的智能木材柔性攀爬机器人

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2025-07-18 DOI: 10.1007/s11249-025-02043-7

Xiaodong Wang, Yaodong Li, Xiaolei Guo, Guanggui Cheng, Rui Lei, Jing Hua, Qichen Zeng, Xucheng Wang, Xuehai Guo

{"title":"A Soft Climbing Robot Based on Smart Wood with Switchable Adhesion","authors":"Xiaodong Wang, Yaodong Li, Xiaolei Guo, Guanggui Cheng, Rui Lei, Jing Hua, Qichen Zeng, Xucheng Wang, Xuehai Guo","doi":"10.1007/s11249-025-02043-7","DOIUrl":"10.1007/s11249-025-02043-7","url":null,"abstract":"<div><p>Climbing robots have vital uses in uncharted terrain exploration, military intelligence collecting, and other areas. To address the drawbacks of classic wall-climbing robots, this study introduced a novel soft climbing robot constructed of the smart wood with switchable adhesion force. The experimental findings indicated that the soft robot implemented in this research could effectively perform climbing movements on diverse walls and sloping pavements, enabled by temperature control through cold/hot water circulation and pneumatic actuation. Further research revealed that the reversible phase transition of PNIPAM at different temperatures was the main reason for the variable adhesion force of the smart wood. Moreover, the adhesion force model developed in this work indicated that the adhesion force of the smart wood surface was mostly composed of the contact mechanics force and the capillary force. Finally, this study will offer novel insights for the design of climbing robots and advance their potential applications.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"73 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessing the Influence of PEEK on Tribocorrosion in Metal on Polymer Total Joint Replacement 聚醚醚酮对聚合物全关节置换术中金属摩擦腐蚀影响的评估

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2025-07-16 DOI: 10.1007/s11249-025-02041-9

Dilesh Raj Shrestha, Rob Beadling, Richard M. Hall, Michael Bryant, Nazanin Emami

{"title":"Assessing the Influence of PEEK on Tribocorrosion in Metal on Polymer Total Joint Replacement","authors":"Dilesh Raj Shrestha, Rob Beadling, Richard M. Hall, Michael Bryant, Nazanin Emami","doi":"10.1007/s11249-025-02041-9","DOIUrl":"10.1007/s11249-025-02041-9","url":null,"abstract":"<div><p>Tribocorrosion studies have primarily focused on hard-on-hard articulations, with limited research on metal-on-polymer (MoP) configurations despite their clinical relevance. This study investigates the tribocorrosion behaviour of cobalt-chromium (CoCr) alloy against 3D-printed polyetheretherketone (PEEK), conventionally manufactured PEEK, and ultrahigh molecular weight polyethylene (UHMWPE), with UHMWPE as the reference material. Tests were conducted using a reciprocating tribometer under open circuit and potentiostatic conditions in phosphate buffered saline (PBS) and bovine calf serum, with in-situ electrochemical monitoring. The results demonstrated that the presence of serum significantly decreased the charge transfer of the CoCr surface, hence decreasing electrochemical degradation when compared to PBS lubrication. The manufacturing methods for PEEK resulted in different surface characteristics, leading to variations in tribocorrosion behaviour; however, polishing to achieve homogeneous roughness minimized these differences. Furthermore, CoCr exhibited significantly higher charge transfer when slid against all tested PEEKs compared with UHMWPE (at least two-fold higher), suggesting that a PEEK-CoCr tribocouple results in an increase of tribocorrosion and a greater potential for metal ion release than a UHMWPE-CoCr tribocouple.</p></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"73 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11249-025-02041-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tribological Performance of High-Chromium Cast Irons: Effect of Chromium Content, Amount of Chromium Carbides (M₇C₃) and Loading Conditions on Wear Resistance 高铬铸铁的摩擦学性能：铬含量、碳化铬量（M₇C₃）和加载条件对耐磨性的影响

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2025-07-13 DOI: 10.1007/s11249-025-02040-w

Rudy Jaramillo, Dario F. Zambrano, Paulina Valenzuela, William Gacitúa, Andreas Rosenkranz

{"title":"Tribological Performance of High-Chromium Cast Irons: Effect of Chromium Content, Amount of Chromium Carbides (M₇C₃) and Loading Conditions on Wear Resistance","authors":"Rudy Jaramillo, Dario F. Zambrano, Paulina Valenzuela, William Gacitúa, Andreas Rosenkranz","doi":"10.1007/s11249-025-02040-w","DOIUrl":"10.1007/s11249-025-02040-w","url":null,"abstract":"<div><p>Selecting cost-effective materials for high-wear applications requires the exploration of alternative materials such as high-chromium cast irons regarding the resulting wear resistance and energy efficiency, justifying potential cost reductions. Our study investigates the tribological performance of high-chromium cast irons depending on the adjusted chromium content (11, 15, and 30 wt.-%) and heat treatment. In this regard, the resulting microstructure, mechanical properties, and wear resistance were analyzed, comparing the performance of high-chromium cast irons with benchmarking high-carbon steel. Complementary materials characterization combined with nanoindentation revealed that an increasing chromium content induced a higher volume fraction of eutectic carbides (M<sub>7</sub>C<sub>3</sub>), thus improving the wear resistance. The sample containing 30 wt.-% of Cr exhibited the lowest wear rate due to its dense carbide network, which acted as a physical barrier against abrasion. While hardness remained stable, the elastic modulus increased with carbide content, indicating a greater material stiffness. Our findings underscore the importance of optimizing the alloy composition and heat treatment to improve the durability and efficiency of materials used in abrasive environments thus providing valuable insights to develop advanced tribological solutions, contributing to energy savings and reduced CO₂ emissions.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"73 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tungsten-Based Polyoxometalate-Ionic Liquid as Lubricant Additive for Low-Viscosity PAO: Effect of Steel Composition and Microstructure on the Boundary Lubricating Performance 钨基多金属氧盐离子液体作为低粘度PAO的润滑添加剂：钢的成分和组织对边界润滑性能的影响

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2025-07-12 DOI: 10.1007/s11249-025-02033-9

M. L. Casasin-Garcia, S. G. Mitchell, N. Espallargas

{"title":"Tungsten-Based Polyoxometalate-Ionic Liquid as Lubricant Additive for Low-Viscosity PAO: Effect of Steel Composition and Microstructure on the Boundary Lubricating Performance","authors":"M. L. Casasin-Garcia, S. G. Mitchell, N. Espallargas","doi":"10.1007/s11249-025-02033-9","DOIUrl":"10.1007/s11249-025-02033-9","url":null,"abstract":"<div><p>The development of environmentally acceptable lubricants and lubricant additives has become a focal point within tribology due to increasing regulatory and sustainability demands. In this context, low-viscosity lubricants are gaining attention for their potential to reduce energy losses. However, their performance under a boundary lubrication regime, where thinner oil film build-up is present, requires more efficient boundary additives. This work evaluates a polyoxometalate-ionic liquid (POM-IL) as a multifunctional boundary additive in a low-viscosity polyalphaolefin-based lubricant, comparing its performance to zinc dialkyldithiophosphate (ZDDP) and a halogen-containing ionic liquid (IL). Tribological tests on AISI 316L stainless steel and AISI 52100 bearing steel revealed that while ZDDP showed substrate-independent adsorption and tribological performance, the IL-based additives had substrate-dependent behaviour. Strong chemisorption was consistent for both IL-based additives, yet their anti-wear and friction-reducing properties differed, showing evidence for the presence of a combined mechanism that includes both strong adsorption and tribochemical reactions. Additionally, the interaction between POM-ILs’ negatively charged surfaces, W atoms, and Cr(III) in 316L was identified as a key factor in their performance. Notably, significant work-hardening was observed in 316L lubricated with POM-IL-containing blends, further enhancing its anti-wear properties. These findings emphasize the role of substrate chemistry in boundary lubricant additive performance in low-viscosity lubricants, offering insights for the development of more efficient multifunctional boundary lubrication solutions.</p></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"73 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11249-025-02033-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Smooth Particle Hydrodynamics Analysis of Hydrodynamic Lubrication with Free Surface Flow 具有自由表面流动的光滑颗粒流体动力学分析

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2025-07-11 DOI: 10.1007/s11249-025-02028-6

Kentaro Tanaka, Toshikazu Fujino, Nicolas Fillot, Philippe Vergne, Katsumi Iwamoto

{"title":"Smooth Particle Hydrodynamics Analysis of Hydrodynamic Lubrication with Free Surface Flow","authors":"Kentaro Tanaka, Toshikazu Fujino, Nicolas Fillot, Philippe Vergne, Katsumi Iwamoto","doi":"10.1007/s11249-025-02028-6","DOIUrl":"10.1007/s11249-025-02028-6","url":null,"abstract":"<div><p>Pressure boundary conditions are required to solve the Reynolds equation for hydrodynamic lubrication. Several boundary conditions have been proposed for the outlet end of the pressure profile while a limited choice is available for the inlet zone. In order not to impose a priori conditions, here we apply the smoothed particle hydrodynamics method (SPH) to the hydrodynamic lubrication problem solved with the Navier–Stokes equations. First, surface tension calculation which is based on the CSF method is developed to consider the deformation of the liquid–air interface. The action of surface tension is verified by comparing the theoretical values of the Laplace pressure and the period of the surface tension oscillation of a circular droplet. The SPH analysis is then used to simulate the hydrodynamic lubrication problem with a limited amount of fluid. The pressure profiles obtained by the SPH analysis show a good agreement with reported FEM and experimental results. Especially in the outlet zone, the minimum pressure and the location of the outlet meniscus boundary agree with the experimental results over a wide range of capillary numbers. Film profiles in the inlet zone are affected by the direction of the gravitational force. In addition, the approach developed here allows the visualization of a vortex flow in the inlet zone and shows that only a limited part of the bottom flow driven by the moving surface is passing through the minimum gap toward the outlet side. This approach opens the way to simulate accurately and without a priori assumptions the hydrodynamic lubrication problem with a free surface flow as found in all starved lubricated contacts.</p></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"73 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Filler Content on Realizing Self-Lubricating and Ultra-Low Wear of PTFE Composites: A Mechanism Study 填料含量对PTFE复合材料自润滑和超低磨损影响的机理研究

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2025-07-07 DOI: 10.1007/s11249-025-02037-5

Shu Yang, Zhenyu Liu, Yingxi Xie, Longsheng Lu, Guodian Huang, Wanshun Wang

{"title":"Effect of Filler Content on Realizing Self-Lubricating and Ultra-Low Wear of PTFE Composites: A Mechanism Study","authors":"Shu Yang, Zhenyu Liu, Yingxi Xie, Longsheng Lu, Guodian Huang, Wanshun Wang","doi":"10.1007/s11249-025-02037-5","DOIUrl":"10.1007/s11249-025-02037-5","url":null,"abstract":"<div><p>Polytetrafluoroethylene (PTFE) improves friction and wear performance by forming a transfer film on counterfaces. However, its high wear rates reduce the fitting accuracy and limit its service life. Adding fillers to PTFE can significantly lower its wear rate. Early theory suggests that fillers reduce wear by providing preferential load support and preventing the development and propagation of subsurface cracks. However, this theory cannot explain the ultra-low wear behavior of some nano fillers and lamellar fillers, and it is also found that the model ignored the effect of the transfer film. With the in-depth study of the wear reduction mechanism, it has been revealed that the ultra-low wear behavior of these fillers is closely related to tribochemistry and the formation of the transfer film. Moreover, research has shown that the type of filler affects the tribological properties of composites. Therefore, it is essential to investigate the wear-reduction mechanisms of different fillers. In this study, we investigated the wear reduction mechanisms of four representative filler-filled PTFE composites, which included carbon-based materials, metals, polar polymers, and non-polar polymers. The results show that (1) the accumulation and preferential load support of fillers on the polymer surface determine its wear resistance, and (2) filler-induced PTFE chain breakage promotes tribochemistry and facilitates the formation of adherent transfer films. Based on these findings, recommendations are provided for the design of low-wear PTFE friction systems.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"73 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of Nano-Sized CaCO3 and Micro-Sized Graphite Blends on the Tribological Properties of Calcium Sulfonate Grease 纳米碳酸钙和微石墨共混物对硫酸钙润滑脂摩擦学性能的影响

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2025-07-06 DOI: 10.1007/s11249-025-02034-8

Longqi Sun, Wenwen Ma, Qin Zhao, Feng Guo, Bingbing Lai, Gaiqing Zhao, Xiaobo Wang

引用次数: 0