Tribology International最新文献_第6页

Revolutionising High-Performance Chain Drive Testing: A Precision Dynamometer with Empirical Bearing Friction Compensation 革命性的高性能链传动测试：精密测功机与经验轴承摩擦补偿

IF 6.1 1区工程技术

Tribology International Pub Date : 2025-05-09 DOI: 10.1016/j.triboint.2025.110737

G.C. Barnaby, J.M. Yon, B.J. Hicks, S.C. Burgess, P.H. Mellor, R.T. Wragge-Morley

{"title":"Revolutionising High-Performance Chain Drive Testing: A Precision Dynamometer with Empirical Bearing Friction Compensation","authors":"G.C. Barnaby, J.M. Yon, B.J. Hicks, S.C. Burgess, P.H. Mellor, R.T. Wragge-Morley","doi":"10.1016/j.triboint.2025.110737","DOIUrl":"10.1016/j.triboint.2025.110737","url":null,"abstract":"<div><div>In elite competitive cycling, where races are won and lost by the smallest of margins, bicycle hardware is under continuous optimisation. However, such is the maturity of today’s bicycles that step changes are implausible and efforts are instead focussed on achieving marginal gains. This presents a distinct challenge for the engineering of chain transmissions, requiring discrimination of fractional performance differences between design or setup changes. To meet this need, we present a bespoke chain dynamometer system together with a novel empirical method of compensation for the losses in support bearings, and an associated experimental methodology for high-fidelity emulation of real-world conditions. The mechanisms of power losses in chains are explored, including the influence of sprocket-sizing, polygonal action and span dynamics. The challenges of measuring losses in highly efficient transmission systems are discussed and the factors influencing measurement uncertainty are described. The dynamometer support bearings’ frictional moments are characterised using a secondary experiment, from which interpolated losses are eliminated from the dynamometer data. The design and operation of the measurement systems are described, and the measurement uncertainty of the bearing data is propagated to evaluate the uncertainty of the chain dynamometer losses by empirical and analytical means. The presented system provides the accuracy and precision necessary to optimise transmission design and lubricant selection for Olympic track cycling competitions. Independent repeats of a baseline chain and commercially available lubricant combinations across multiple test campaigns have yielded a bounds uncertainty of <span><math><mrow><mo><</mo><mn>1</mn><mo>.</mo><mn>75</mn><mtext>%</mtext></mrow></math></span> of the measured power loss at the 99% confidence interval.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110737"},"PeriodicalIF":6.1,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134626","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}

引用次数: 0

Ultra-high dispersion MoS2QDs hybrid polyethylene glycol: Multilayer heterostructure tribofilm 超高分散MoS2QDs杂化聚乙二醇：多层异质结构摩擦膜

IF 6.1 1区工程技术

Tribology International Pub Date : 2025-05-08 DOI: 10.1016/j.triboint.2025.110793

Hongyu Liu , Zhongpan Zhang , Xinrui Li , Yihan Zhang , Xiaoqiang Fan , Minhao Zhu

引用次数: 0

Deep groove ball bearing cage design using computational fluid dynamics 利用计算流体动力学设计深沟球轴承保持架

IF 6.1 1区工程技术

Tribology International Pub Date : 2025-05-08 DOI: 10.1016/j.triboint.2025.110775

Jungsoo Park , Farshid Sadeghi , Seungpyo Lee , Sangjun Lee , Ujjawal Arya , Saeed Aamer

引用次数: 0

Synergistic anti-wear performance of TiO2 nanoparticles and ZDDP: Influence of dispersion methods TiO2纳米粒子与ZDDP协同抗磨性能：分散方式的影响

IF 6.1 1区工程技术

Tribology International Pub Date : 2025-05-08 DOI: 10.1016/j.triboint.2025.110791

Adam Nassif , Frédéric Georgi , Pierre Montmitonnet , Frank Meyer , Imène Lahouij

{"title":"Synergistic anti-wear performance of TiO2 nanoparticles and ZDDP: Influence of dispersion methods","authors":"Adam Nassif , Frédéric Georgi , Pierre Montmitonnet , Frank Meyer , Imène Lahouij","doi":"10.1016/j.triboint.2025.110791","DOIUrl":"10.1016/j.triboint.2025.110791","url":null,"abstract":"<div><div>Zinc dialkyldithiophosphate (ZDDP) remains a cornerstone anti-wear additive in lubricants, particularly in applications demanding extreme boundary lubrication performance. However, emerging challenges in electric vehicle (EV) transmissions, such as higher available torque at standstill and lower lubricant viscosity, necessitate advanced formulations. Metal oxide nanoparticles, particularly anatase TiO<sub>2</sub>, have demonstrated potential to enhance wear protection through the formation of protective tribofilms. This study investigates the benefits of combining TiO<sub>2</sub> nanoparticles with ZDDP in mitigating wear under boundary conditions. We evaluate the impact of dispersion methods, including oleic acid-based physical dispersion and chemical functionalization, on the tribological performance of these hybrid formulations. Using a combination of ball-on-disc tribological testing, profilometry, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS) analyses, we demonstrate a synergistic effect between ZDDP and TiO<sub>2</sub> nanoparticles, delivering superior wear protection and friction reduction compared to individual components, regardless of dispersion method. However, chemically functionalized TiO<sub>2</sub> outperforms physically dispersed nanoparticles by forming a thicker and more uniform anti-wear tribofilm. These findings highlight the potential for hybrid lubricant formulations to meet the demands of advanced automotive applications.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110791"},"PeriodicalIF":6.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143934603","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}

引用次数: 0

Effect of current discharges across MTM and MPR tribological contacts with negatively charged MTM ball and MPR roller 带负电荷的MTM球和MPR滚子对MTM和MPR摩擦接触电流放电的影响

IF 6.1 1区工程技术

Tribology International Pub Date : 2025-05-08 DOI: 10.1016/j.triboint.2025.110776

G. Cernalevschi , M. Ratoi , B.G. Mellor , Y. Cai

引用次数: 0

How swelling affects microscale creasing and stick-slip friction of soft elastomers

IF 6.1 1区工程技术

Tribology International Pub Date : 2025-05-08 DOI: 10.1016/j.triboint.2025.110794

Sazzadul A. Rahat , Rong Long , Jonathan T. Pham

引用次数: 0

Modeling adhesive contact behavior with interfacial displacement discontinuities 界面位移不连续的黏着接触行为建模

IF 6.1 1区工程技术

Tribology International Pub Date : 2025-05-08 DOI: 10.1016/j.triboint.2025.110749

Xuefeng Tang , Wanyou Yang , Yuanyuan Liang , Qiang Yang

{"title":"Modeling adhesive contact behavior with interfacial displacement discontinuities","authors":"Xuefeng Tang , Wanyou Yang , Yuanyuan Liang , Qiang Yang","doi":"10.1016/j.triboint.2025.110749","DOIUrl":"10.1016/j.triboint.2025.110749","url":null,"abstract":"<div><div>Coatings or layers are beneficial for modifying adhesive contact behaviors. However, imperfect bonding at the layer–substrate interface due to various factors can potentially affect adhesive contact responses. This study incorporates interfacial displacement discontinuity, accounting for dislocation-like and spring-like bonding imperfections, into an adhesive contact model. Adhesive interactions are modeled by Lennard-Jones(LJ) surface force law, with the effects of imperfections captured through layer surface deformation computed via fast Fourier transform (FFT). Therefore, a model for adhesive contact on an imperfect layer–substrate system is developed, and the effects of imperfection coefficients are then examined. The results indicate that normal imperfection coefficients have more pronounced effects than tangential ones, with smaller values exerting a greater impact. Dislocation-like imperfections dominate in contact systems with higher Tabor parameters, while spring-like imperfections are more prominent in systems with lower values. These imperfection coefficients, along with material parameters such as imperfection depth (layer thickness), the layer’s work of adhesion, and elastic modulus ratios, influence the adhesive force. The imperfection coefficients alter the adhesive force magnitude but do not affect the governing relationship between material parameters and adhesive force. Dislocation-like imperfections reduce adhesive force, while spring-like imperfections can either increase or decrease it, depending on the imperfection depth. Interfacial imperfections can raise the maximum subsurface von Mises stress, compromising system reliability. These findings emphasize the effects of discontinuous displacement-type imperfections on adhesive contact and provide valuable insights for engineering applications.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110749"},"PeriodicalIF":6.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143934606","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}

引用次数: 0

Choline amino acid ionic liquid micelles enhance the oxidation resistance and tribological properties of MXene 胆碱氨基酸离子液体胶束增强了MXene的抗氧化性和摩擦学性能

IF 6.1 1区工程技术

Tribology International Pub Date : 2025-05-07 DOI: 10.1016/j.triboint.2025.110790

Mingyuan Dou , Qing Feng , Kangchun Li , Zhenpeng Li , Fuchuan Huang , Fukang Deng

{"title":"Choline amino acid ionic liquid micelles enhance the oxidation resistance and tribological properties of MXene","authors":"Mingyuan Dou , Qing Feng , Kangchun Li , Zhenpeng Li , Fuchuan Huang , Fukang Deng","doi":"10.1016/j.triboint.2025.110790","DOIUrl":"10.1016/j.triboint.2025.110790","url":null,"abstract":"<div><div>The unique physicochemical properties and 2D layered structure of MXene make it a promising lubricant additive. However, its chemical instability limits its application in environmentally friendly and sustainable lubrication systems. Although various strategies have been explored to enhance the chemical stability and tribological properties of MXene aqueous solutions, these approaches often compromise MXene's chemical compatibility and require high-viscosity petroleum-based lubricants. In this study, choline hydroxide and amino acids were added to a Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> aqueous solution, leading to the self-assembly of choline hydroxide and amino acids into ionic liquid micelles. These micelles effectively passivated the surface of Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> and improved its chemical stability. The experimental and simulation results showed that the ionic liquid micelles facilitated the formation of hydrogen bonds and coordination bonds between the amino acid and the Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> surface. This interaction increased the binding energy by 2.5 times, preventing oxidation and degradation for over 90 days of storage. Moreover, during frictional processes, a TiN/TiO<sub>2</sub> reaction film formed between choline hydroxide, amino acids, and Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> contributed to improved tribological properties, reducing the friction coefficient by up to 39.18 % and the wear rate by up to 69.79 %, while ensuring long-term friction stability.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110790"},"PeriodicalIF":6.1,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143927870","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}

引用次数: 0

Reconstructing high-resolution EHL results from coarse data by a deep convolutional neural network

IF 6.1 1区工程技术

Tribology International Pub Date : 2025-05-07 DOI: 10.1016/j.triboint.2025.110787

Yang Zhao , Shuo Guo , Zhongxue Fu , Zhijun Deng

引用次数: 0

Effect of ultrasonic nanocrystal surface modification on microstructural evolution and tribological properties of pure tungsten 超声纳米晶表面改性对纯钨微观组织演变和摩擦学性能的影响

IF 6.1 1区工程技术

Tribology International Pub Date : 2025-05-07 DOI: 10.1016/j.triboint.2025.110792

M. Zohrevand , J. Likonen , J.W. Coenen , A. Amanov

引用次数: 0