Tribology International最新文献

{"title":"Using lubricant composition to control friction-induced-vibration in an elastomer-steel contact representing a hydraulic seal","authors":"Sorin-Cristian Vladescu ,&nbsp;Ralph Lumby ,&nbsp;Andrew Gant ,&nbsp;Helen Dyer ,&nbsp;Tom Reddyhoff","doi":"10.1016/j.triboint.2024.110346","DOIUrl":"10.1016/j.triboint.2024.110346","url":null,"abstract":"<div><div>Hydraulic seals are key industrial components that can suffer from unwanted friction induced vibration (FIV). The types of FIV mechanism that occur in these components, and how they may be controlled, are not well known. We conducted sliding friction tests on contacts between seal materials, lubricated by hydraulic fluids, under speeds and contact pressures typical of hydraulic machines. FIV that occurred under certain conditions was captured and analysed. Results suggest 1) two FIV mechanisms are occurring: classic stick-slip and speed dependant friction instability, the 2) occurrence and severity of these mechanisms are correlated with the ratio of static to dynamic friction and the gradient of the friction vs. speed (Stribeck) curve, respectively, 3) these parameters can be controlled by including an appropriate additive package in the lubricant and this significantly reduces FIV, 4) most FIV occurs at low temperature and high load since these both lead to low kinetic friction (due to thicker hydrodynamic films and smoother surfaces) and thus promote stick-slip. This may explain instances of noise known in practice as the “Monday-morning effect” and suggests how this too may be alleviated through lubricant formulation.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110346"},"PeriodicalIF":6.1,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Methylcellulose-functionalized gallium-based liquid-metal nanoparticles as water-based lubricant additives","authors":"Yafei Cui ,&nbsp;Jie Guo ,&nbsp;Jun Cheng ,&nbsp;Yushan Geng ,&nbsp;Hui Tan ,&nbsp;Shengyu Zhu ,&nbsp;Jun Yang","doi":"10.1016/j.triboint.2024.110336","DOIUrl":"10.1016/j.triboint.2024.110336","url":null,"abstract":"<div><div>Ga-based liquid metal nanoparticles (GLM-NPs) are a novel high-performance additive for lubricants and this work novelty prepared a novel type of heterogeneous nanoparticles modified with a cost-effective and available methylcellulose (GLM-NPs/MC). It displays a clear core-shell structure with a particle size of about 270 nm, and as a water-based lubricant additive, it exhibits good tribology properties, reducing the friction coefficient and wear rate of the 304 steel discs by about 59 % and 40 % respectively. The high dispersion and good stability of GLM-NPs/MC make them slowly enter into the worn surface to form a Ga-rich tribo-film. In addition, the influence of GLM-NPs/MC content on the lubrication performance of the water was also studied and the optimization additive content is 0.6 wt%. This study provides insights into the design of nano-composite materials based on gallium-based liquid metal for lubrication applications.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110336"},"PeriodicalIF":6.1,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561087","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":"High-accuracy ultrasonic measurement of oil film thickness in sliding bearings considering surface thin coating","authors":"Peng Zheng ,&nbsp;Shijie Wei ,&nbsp;Pan Dou ,&nbsp;Xinru Gao ,&nbsp;Tonghai Wu ,&nbsp;Min Yu ,&nbsp;Yaguo Lei","doi":"10.1016/j.triboint.2024.110343","DOIUrl":"10.1016/j.triboint.2024.110343","url":null,"abstract":"<div><div>Focusing on the difficulty and inaccuracy of separating reflected waves from overlapping echoes caused by coating when measuring the oil film thickness of coated sliding bearings using ultrasonic. This paper proposes a pseudo reflection coefficient (PRC) constructed using the overall reflected wave and reference wave. And a robust PRC model is constructed to simultaneously calculate the oil film and coating thickness. Acoustic simulations verify the accuracy of the method and reveal that the PRC model has better stability. Application experiments are conducted on an actual aviation fuel gear pump. The good consistency between theory and experiment has demonstrated the effectiveness of the method. In addition, the elastic deformation of the bearing is derived based on the minimum oil film thickness.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110343"},"PeriodicalIF":6.1,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142535917","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":"Current-carrying low friction of hydrogenated amorphous carbon film","authors":"Hao Yu,&nbsp;Zhixin Zhang,&nbsp;Yongwei Shi,&nbsp;Peidong Xue,&nbsp;Cheng Chen","doi":"10.1016/j.triboint.2024.110340","DOIUrl":"10.1016/j.triboint.2024.110340","url":null,"abstract":"<div><div>Hydrogenated amorphous carbon (a-C:H) films, which equip excellent low friction performance but insulated, are naturally excluded from sliding electrical contact applications. In this work, we achieved current-carrying low friction of a-C:H film by utilizing a triboelectric triggered ignition effect. Protective resistors were introduced in the circuit during run-in for effectively alleviating undesired arc ablation. A T-shape crystalline structure of graphite was observed in the wear track by transmission electron microscopy. The parallel-aligned graphite at the top surface induced low friction, while the vertical-aligned graphite in the interior formed efficient electron transmission channels. This study expands the selection range of current-carrying friction films and provides a novel insight for the design and regulation of current-carrying friction films.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110340"},"PeriodicalIF":6.1,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142535915","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":"The effect of deep-sea pressure during long-term aging on the tribological performance of fabric-reinforced phenolic composites","authors":"Yihao Fan ,&nbsp;Jianzhang Wang ,&nbsp;Hao Liu ,&nbsp;Zhengtao Su ,&nbsp;Gaolin Pei","doi":"10.1016/j.triboint.2024.110344","DOIUrl":"10.1016/j.triboint.2024.110344","url":null,"abstract":"<div><div>The influence of hydrostatic pressures up to 30 MPa on the friction and wear behavior of fiber reinforced polymer composites (FRPCs) was investigated together with seawater absorption, interfacial structure and mechanical properties. The results revealed that after aging in the deep-sea environment, the wear rate of the FRPC increased from 1.53 × 10⁻⁶ mm³/N∙m to 3.61 × 10⁻⁶ mm³/N∙m, and the mechanical strength decreased reversibly. The damage mechanism was assumed to be dominated by the combined effect of crack propagation in the polymer matrix and interfacial debonding at high seawater pressures, characterized by a decreased resin modulus and increased interfacial thickness.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110344"},"PeriodicalIF":6.1,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142535919","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":"Performance analysis of ER fluid-lubricated two-lobe hole-entry hybrid journal bearings with bionic and spherical texture surfaces optimized by genetic algorithm","authors":"Chandra B. Khatri ,&nbsp;Saurabh K. Yadav ,&nbsp;Krishnkant Sahu ,&nbsp;Satish C. Sharma","doi":"10.1016/j.triboint.2024.110332","DOIUrl":"10.1016/j.triboint.2024.110332","url":null,"abstract":"<div><div>This study is done into the multifaceted world of ER (Electro-rheological) fluid-lubricated optimized textured hybrid hole-entry journal bearings to improve dynamic performance of the bearing and stability. These innovative techniques harness the dynamic properties of ER fluids in conjunction with optimized textured spherical and bionic textured surfaces to achieve enhanced performance and reliability. This study aims to explore the influence of ER fluid on the tribological behaviour and controllability of hybrid hole-entry journal bearings. Further it proposes the optimized design of bionic and spherical textured surfaces, capitalizing on their ability to influence fluid flow, load-carrying capacity, and friction reduction. The results demonstrate promising improvements in bearing performance metrics, including dynamic stability and fluid film damping, load-carrying capacity, friction reduction, and controllability, facilitated by the integration of ER fluid and the optimization of textured spherical and bionic textured surfaces. This study offers valuable insights into the potential applications of ER fluids and biomimicry-inspired textured surfaces in bearing system engineering. The inclusion of bionic textured hole-entry hybrid bearing lubricated with ER fluid improves the stability by up to 112.57 % and decrease the friction coefficient up to 23.37 %. The findings are expected to inform the design and development of high-performance hole-entry hybrid journal bearings with diverse industrial applications.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110332"},"PeriodicalIF":6.1,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142535914","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":"Scratch geometry effects on lubrication and performance of two-lobe journal bearings: A detailed study","authors":"Anh T. Vo ,&nbsp;J. Bouyer ,&nbsp;Phuoc Vinh Dang ,&nbsp;M. Fillon","doi":"10.1016/j.triboint.2024.110334","DOIUrl":"10.1016/j.triboint.2024.110334","url":null,"abstract":"<div><div>Scratches on bearing surfaces can significantly affect the performance and lifespan of journal bearings. This study investigates the impact of scratches on two-lobe journal bearings through both theoretical and numerical analyses. The theoretical approach provides insights into how scratches influence lubrication, while the numerical simulations investigate how the three key scratch parameters, namely width, position, and depth, affect bearing performance. Key metrics analyzed include pressure, velocity distributions, temperature profiles, eccentricity, attitude angle, minimum film thickness, and maximum temperature. The findings offer valuable guidance for optimizing bearing design, maintenance, and condition monitoring, contributing to enhanced reliability and operational efficiency.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110334"},"PeriodicalIF":6.1,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142535918","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":"Wear and corrosion resistance of textured and functionally particle-enhanced multilayer dual-biomimetic polymer coatings","authors":"Jin Yan ,&nbsp;Yujie Rong ,&nbsp;Ying Zhang ,&nbsp;Shaofeng Zhou ,&nbsp;Jin Huang ,&nbsp;Guizhe Zhao ,&nbsp;Yaqing Liu","doi":"10.1016/j.triboint.2024.110335","DOIUrl":"10.1016/j.triboint.2024.110335","url":null,"abstract":"<div><div>This study presents a dual-biomimetic polymer coating with improved wear and corrosion resistance, inspired by natural biological structures of shells and superhydrophobic surfaces. The coating is composed of alternating hard epoxy resin layers, modified with benzotriazole-functionalized silica for corrosion protection, and soft fluorocarbon resin layers, enhanced with graphene oxide for improved mechanical properties. Surface textures were added using a soft template method to boost hydrophobicity and reduce wear. The coating demonstrated excellent hardness, impact resistance, and corrosion protection, particularly in simulated seawater. Additionally, surface textures further minimized wear by trapping debris. This design strategy offers a promising approach for advanced polymer coatings in marine, machinery, and chemical applications, combining durability, protection, and self-healing properties.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110335"},"PeriodicalIF":6.1,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142535911","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":"The degeneration mechanism of lubricating oil in the ammonia fuel engine","authors":"Xing Xu ,&nbsp;Chang Ge ,&nbsp;Baofeng Zhang ,&nbsp;Xuan Ma ,&nbsp;Rui Guo ,&nbsp;Xiqun Lu","doi":"10.1016/j.triboint.2024.110333","DOIUrl":"10.1016/j.triboint.2024.110333","url":null,"abstract":"<div><div>As a hydrogen-rich carbon-free fuel, ammonia has attracted great attention in the engine field. However, there are few studies on the lubricating oil of the ammonia engine, which hinders the development of the ammonia engine. To study the impact of ammonia on the physicochemical properties and the lubricating performances of the lubricating oil, water-lubricating oil, and lubricating oil-water-ammonia were prepared. By investigating dispersion stability, viscosity, thermal stability, and film-forming ability of different lubricating oils, the effect of ammonia on the physicochemical properties and lubricating properties of lubricating oil was analyzed. The effect mechanism of ammonia on the lubricating oil was also explored. This work can be a foundational contribution to the lubricating oil for the ammonia engine.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110333"},"PeriodicalIF":6.1,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142535906","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":"Fretting behavior of hydrogenated nitrile rubber for sealing application of ultra-deep well","authors":"Zhangyu Qiao,&nbsp;Yanbao Guo,&nbsp;Zheng Zhang,&nbsp;Xingyu Wang,&nbsp;Deguo Wang","doi":"10.1016/j.triboint.2024.110328","DOIUrl":"10.1016/j.triboint.2024.110328","url":null,"abstract":"<div><div>With complex operating conditions and frequent pressure fluctuations in ultra-deep wells, the fretting wear caused by tubing string vibration inevitably affects the sealing performance of packer cartridge during well completion. In response to reveal the fretting damaged mechanism of cartridge rubber, an experimental and simulated investigation was carried out. Reciprocating fretting tests of hydrogenated nitrile rubber (HNBR) against casing steel (N-80) were conducted at 25 ℃, 65 ℃, 105 ℃, 145 ℃, and the displacement amplitude ranges from 0.25– 4 mm. The results indicate that the fretting state transfers from mixed fretting region (MFR) to partial slip region (PSR)/MFR with the increased temperature under lower displacement amplitude (0.25–1 mm), where the wear rate shows a decline with the increased temperature. It is mainly because that the increased sticky characteristics with temperature can decline the relative sliding. Under larger displacement amplitude (2–4 mm), the running condition transferred from slip region (SR) to MFR with the increased temperature eventually, where the interface is mainly dominated by sliding. The wear rate shows a dramatically increase with the increase in temperature due to the sharply decline of mechanical properties. The interfacial displacement variation obtained by finite element calculation are verified with the running condition of fretting map (RCFM). The established materials response fretting map for HNBR can gave an epoch-making reference on how to identifying the risk of sealing failure duo to tubing string vibration for a packer. This research also can highly enrich the fretting tribological theory in terms of high temperature.</div></div><div><h3>Statement of originality</h3><div>I write on behalf of myself and all co-authors to confirm that the results reported in the manuscript are original and neither the entire work, nor any of its parts have been previously published. The authors confirm that the article has not been submitted to peer review, nor has been accepted for publishing in another journal. The authors confirm that the research in their work is original, and that all the data given in the article are real and authentic. If necessary, the article can be recalled, and errors corrected.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110328"},"PeriodicalIF":6.1,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142536080","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}