Friction最新文献_第2页

Refreezing of frictional meltwater behind a sliding ski 雪板后面的融水重新结冰

IF 6.8 1区工程技术

Friction Pub Date : 2025-09-12 DOI: 10.26599/frict.2025.9441179

M. Hasler, W. Jud, J. van Putten, W. Nachbauer

{"title":"Refreezing of frictional meltwater behind a sliding ski","authors":"M. Hasler, W. Jud, J. van Putten, W. Nachbauer","doi":"10.26599/frict.2025.9441179","DOIUrl":"https://doi.org/10.26599/frict.2025.9441179","url":null,"abstract":"Low friction on snow has been attributed to the formation of a frictional meltwater layer for many years, yet experimental evidence for this mechanism has remained inconsistent. In a large-scale snow tribometer lab, we measured the snow surface temperature behind a sliding cross-country ski and a flat sliding sample with an infrared camera to study the meltwater film at realistic skiing conditions.\u0000At speeds ranging from 5 to 25 m/s and an initial snow temperature of −3.5 °C, surface temperatures increased locally to as high as −0.09 °C. At 15 and 25 m/s, the temperature decay following a ski passage deviated notably from the expected exponential cooling behavior. Instead, the post-passage temperature profile exhibited two distinct phases: an initial slow decline, attributed to latent heat release during the freezing of meltwater, followed by a phase of exponential cooling. This two-phase behavior provides clear evidence for the presence of frictionally generated meltwater. Although the presence of meltwater was most clearly observed after repeated passes over the same track and only at the higher speed, its presence at lower speed or during initial runs cannot be ruled out. The infrared system monitored only the exposed snow surface and may have missed transient meltwater that refroze beneath the ski.","PeriodicalId":12442,"journal":{"name":"Friction","volume":"164 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145043362","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 seawater intrusion on tribological properties of brass/steel pairs in hydraulic oil 海水侵入对液压油中黄铜/钢副摩擦学性能的影响

IF 6.8 1区工程技术

Friction Pub Date : 2025-09-12 DOI: 10.26599/frict.2025.9441177

Xianchun Jiang, Runzhou Xu, Yipan Deng, Xiumin Sun, Xiaohui Luo, Defa Wu, Yinshui Liu

{"title":"Effect of seawater intrusion on tribological properties of brass/steel pairs in hydraulic oil","authors":"Xianchun Jiang, Runzhou Xu, Yipan Deng, Xiumin Sun, Xiaohui Luo, Defa Wu, Yinshui Liu","doi":"10.26599/frict.2025.9441177","DOIUrl":"https://doi.org/10.26599/frict.2025.9441177","url":null,"abstract":"In seawater hydraulic pumps, the cross-contamination between oil and seawater is frequently observed, significantly influencing both the operational efficiency and the service life of the pumps. In this research, the tribological behavior of brass/steel pairs in hydraulic oil with artificial seawater (3.5 wt.% NaCl) intrusion was examined. The results revealed that the NaCl solution concentration in the emulsions has an essential influence on the lubrication state and wear mechanism of brass/steel pairs. As the viscosity of the emulsion increases, the lubrication state at the wear interface improves, which reduces the contact stress at the friction interface and reduces abrasive damage. Moreover, with the increase of NaCl solution concentration, the primary wear mechanism underwent two transitions: initially shifting from abrasive wear to a combination of adhesive and corrosion wear, ultimately evolving into corrosion wear. These findings are crucial for understanding the tribological behavior of brass/steel pairs in seawater-in-oil emulsions. This study provides a valuable experimental basis for improving the performance of the marine equipment.","PeriodicalId":12442,"journal":{"name":"Friction","volume":"20 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145043361","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

The impact of superficial zone damage on the tribological performance of cartilage: Implications for early intervention in osteoarthritis 浅表区损伤对软骨摩擦学性能的影响：骨关节炎早期干预的意义

IF 6.8 1区工程技术

Friction Pub Date : 2025-09-12 DOI: 10.26599/frict.2025.9441175

Ruiqi Chen, Lilan Gao, Yansong Tan, Xianglong Lin, Jie Liu, Chunqiu Zhang, Xiaoqing Hu, Li Guo, Xiaochun Wei

{"title":"The impact of superficial zone damage on the tribological performance of cartilage: Implications for early intervention in osteoarthritis","authors":"Ruiqi Chen, Lilan Gao, Yansong Tan, Xianglong Lin, Jie Liu, Chunqiu Zhang, Xiaoqing Hu, Li Guo, Xiaochun Wei","doi":"10.26599/frict.2025.9441175","DOIUrl":"https://doi.org/10.26599/frict.2025.9441175","url":null,"abstract":"The superficial zone of articular cartilage plays a vital role in maintaining low friction and wear within joints due to its excellent lubricating properties. While the tribological properties of cartilage with an intact superficial zone have been widely studied, it remains unclear how different degrees of superficial zone damage affect cartilage lubrication, friction, and wear. In this study, we conducted friction and wear experiments to assess changes in cartilage performance before and after damage, examining surface roughness and microstructure to understand lubrication and wear mechanisms. We also used finite element method (FEM) simulations to study the evolution of wear behavior in damaged cartilage. The research shows that as damage to the superficial zone of cartilage worsens, its lubricating performance continuously decreases, leading to more intense wear. The cartilage friction coefficient exhibited varying degrees of dependence on pressure and speed at different periods, suggesting that superficial zone damage might cause a shift in the lubrication state of the cartilage. Furthermore, based on the observed cartilage wear parameters and morphological features, we further confirmed that fatigue wear is the primary wear mode, and proposed a numerical model for predicting cartilage wear volume based on the degree of damage. This emphasizes the importance of protecting and restoring the superficial zone in cartilage repair and regeneration strategies.","PeriodicalId":12442,"journal":{"name":"Friction","volume":"43 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145043328","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

Ionic liquid-functionalized magnesium silicate hydroxide as advanced lubricant additives for enhanced tribological performance and micropitting repair 离子液体功能化硅酸氢氧化镁作为高级润滑剂添加剂，具有增强摩擦学性能和修复微点蚀的作用

IF 6.8 1区工程技术

Friction Pub Date : 2025-08-29 DOI: 10.26599/frict.2025.9441171

Tong Su, Chao Ju, Dongdong Zheng, Quande Zhang, Qin Zhao, Gaiqing Zhao, Feng Guo, Xiaobo Wang

{"title":"Ionic liquid-functionalized magnesium silicate hydroxide as advanced lubricant additives for enhanced tribological performance and micropitting repair","authors":"Tong Su, Chao Ju, Dongdong Zheng, Quande Zhang, Qin Zhao, Gaiqing Zhao, Feng Guo, Xiaobo Wang","doi":"10.26599/frict.2025.9441171","DOIUrl":"https://doi.org/10.26599/frict.2025.9441171","url":null,"abstract":"Rolling contact fatigue (RCF) failures in critical components like precision gears and high-performance bearings, have become increasingly prominent under demanding conditions. Conventional lubricant additives struggle to simultaneously reduce friction, resist wear, and repair dynamic micropitting. To address this challenge, a composite material of ionic liquid-functionalized magnesium silicate hydroxide ([DDP][TOA]/MSH) was synthesized using hydrothermal synthesis and non-covalent modification. This composite exhibited remarkable dispersion stability and copper corrosion inhibition, as well as superior tribological properties including friction reduction, wear mitigation, and micropitting repair during rolling-sliding contact. Tribological evaluations revealed that 1.0 wt% [DDP][TOA]/MSH reduced friction coefficient by 17.2% and wear volume by 52.5%, demonstrating unprecedented load-bearing capacity and frequency adaptability. Notably, in rolling-sliding contact fatigue conditions, commercial gear oil exacerbated micro-pitting damage continuously, whereas the composite material could repair it, with a repair efficiency of 72.0%. Surface characterization reveals a three-stage mechanism for the dynamic repair of worn metal surfaces: (1) micro-asperities are removed through mechanical grinding, (2) micro-cracks are filled via tribochemical deposition of FeS/phosphate phases, and (3) a hybrid a-SiC/a-SiOx repair layer is formed with improved mechanical strength, effectively preventing fatigue wear propagation. This work demonstrates the synergistic effect of ionic liquids and layered silicate additives on micropitting repair under rolling contact fatigue, expanding the application of MSH in the field of commercial lubricant additives.","PeriodicalId":12442,"journal":{"name":"Friction","volume":"19 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144915638","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

Lubricant infiltration physics and enabling technology in machining: modeling and machinability 加工中的润滑油渗透物理和使能技术：建模和可加工性

IF 6.8 1区工程技术

Friction Pub Date : 2025-08-29 DOI: 10.26599/frict.2025.9441173

Wenyi Li, Libin Wu, Yanbin Zhang, Xin Cui, Fan Zhang, Liandi Xu, Haiyuan Xin, Rui Xue, Qingfeng Bie, Guanqun Li, Changhe Li

{"title":"Lubricant infiltration physics and enabling technology in machining: modeling and machinability","authors":"Wenyi Li, Libin Wu, Yanbin Zhang, Xin Cui, Fan Zhang, Liandi Xu, Haiyuan Xin, Rui Xue, Qingfeng Bie, Guanqun Li, Changhe Li","doi":"10.26599/frict.2025.9441173","DOIUrl":"https://doi.org/10.26599/frict.2025.9441173","url":null,"abstract":"Lubricants are essential in machining as they significantly affect workpiece surface quality. However, due to the diversity of lubricant types and the complexity of infiltration physics, there remains an urgent need to improve infiltration performance based on the underlying physical processes. This paper systematically reviews the infiltration mechanisms of lubricants under different machining conditions. First, the influence of lubricant morphological characteristics and physicochemical properties on infiltration behavior is analyzed at the microscale, clarifying the mechanisms governing different states, including liquid, gas, and multiphase flow. Second, the interaction between tool geometric boundary conditions and lubricant infiltration behavior is examined, providing an evaluation of infiltration performance at the workpiece surface. Finally, the microscopic mechanisms of lubricant behavior under the influence of typical energy fields are discussed, and the regulation effect of these fields on lubricant infiltration is revealed. This review offers a theoretical reference for advancing the understanding of lubricant infiltration mechanisms and improving infiltration performance in machining.","PeriodicalId":12442,"journal":{"name":"Friction","volume":"13 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144915640","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

Study on the interface and morphological control mechanism of calcium sulfonate grease thickener 磺酸钙润滑脂增稠剂的界面及形态控制机理研究

IF 6.8 1区工程技术

Friction Pub Date : 2025-08-29 DOI: 10.26599/frict.2025.9441170

Jiajia Jia, Congcong Shi, Peng Yue, Kun Han, Yujuan Zhang, Pingyu Zhang, Shengmao Zhang, Wenbin Kan, Xu Zhou

{"title":"Study on the interface and morphological control mechanism of calcium sulfonate grease thickener","authors":"Jiajia Jia, Congcong Shi, Peng Yue, Kun Han, Yujuan Zhang, Pingyu Zhang, Shengmao Zhang, Wenbin Kan, Xu Zhou","doi":"10.26599/frict.2025.9441170","DOIUrl":"https://doi.org/10.26599/frict.2025.9441170","url":null,"abstract":"In this study, lauric acid was introduced in the growth of thickener of calcium sulfonate grease, and the low temperature fluidity and drop point of the grease were greatly improved by regulating the morphology of the thickener and the oil fixing ability of the surface. The aspect ratio of thickener was increased from 1 to 5, and the specific surface area was increased by 40.12%. At the same consistency, the low temperature similar viscosity decreased by 11.63%, and the drop point increased by nearly 100 ℃. By comparing the effects of lauric acid, amine and alcohol with different polar end groups on the surface adsorbability and wettability of the thickener, it was found that the adsorption quality of the three molecules was similar, but only lauric acid and amine could significantly improve the lipophilicity of the surface of the thickener and increase the drop point of the grease by nearly 100 ℃. Through molecular dynamics simulation, it is found that the alkyl chain of linear acid and amine molecules adsorbed on the surface of the thickener is almost perpendicular to the surface of the thickener, which makes the interface base oil difficult to slip, increases the adsorbed oil content and the effective radius of the thickener, and effectively increases the drop point of the grease. The long alkyl chain of the linear chain alcohol molecules is almost parallel to the surface of the thickener, which has little effect on the physicochemical properties of the grease.","PeriodicalId":12442,"journal":{"name":"Friction","volume":"35 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144915637","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

Effects of re-entrant auxetic structure on friction-induced vibrational behaviour of 3D printed PLA in sliding wear process 再入式消声结构对3D打印PLA滑动磨损摩擦激振行为的影响

IF 6.8 1区工程技术

Friction Pub Date : 2025-08-29 DOI: 10.26599/frict.2025.9441172

Yunxiang Deng, Yu Zhao, Boyang Wan, Li Chang

引用次数: 0

Weighted physics-informed neural network (weighted PINN) for obtaining elastic responses under Hertzian-like contact 加权物理信息神经网络（加权PINN）用于求解类赫兹接触下的弹性响应

IF 6.8 1区工程技术

Friction Pub Date : 2025-08-19 DOI: 10.26599/frict.2025.9441062

Yang Zhao, Zhongxue Fu, Jianfeng Zhao

引用次数: 0

A framework for wheel profile wear prediction of high-speed trains considering tread modification 考虑胎面改造的高速列车车轮齿形磨损预测框架

IF 6.8 1区工程技术

Friction Pub Date : 2025-08-19 DOI: 10.26599/frict.2025.9441060

Yuchen Xie, Maoru Chi, Wubin Cai, Shulin Liang, Yixiao Li, Yabo Zhou, Peng Wang

{"title":"A framework for wheel profile wear prediction of high-speed trains considering tread modification","authors":"Yuchen Xie, Maoru Chi, Wubin Cai, Shulin Liang, Yixiao Li, Yabo Zhou, Peng Wang","doi":"10.26599/frict.2025.9441060","DOIUrl":"https://doi.org/10.26599/frict.2025.9441060","url":null,"abstract":" Tread modification has gained significant attention in recent years as a means to address the issue of wheel hollow wear. The wear resulting from tread modification can alter the wheel profile, thereby impacting the wheel–rail contact relationship and vehicle dynamics performance. Consequently, it is crucial to understand the influence of tread modification on wheel wear. This study proposes a prediction method for the wheel profile’s comprehensive wear (WPCW) for high-speed trains, considering the impacts of both the wheel–rail interaction and the tread modification on the wheel profile comprehensive wear. First, simulation models are established to quantify wheel wear resulting from wheel–rail interactions and tread modification. Subsequently, the coupling relationship between the two models is subsequently strengthened by incorporating iterative calculation processes, resulting in the prediction model of the wheel profile comprehensive wear. Finally, the prediction method is calibrated and verified through measured data. The simulation results obtained using this method align with the measured results, confirming the feasibility of the proposed prediction method and its applicability in predicting the WPCW for high-speed trains. ","PeriodicalId":12442,"journal":{"name":"Friction","volume":"9 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144898055","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

Study of graphene-family nanomaterials as grease additives for electro-regulated friction 石墨烯族纳米材料作为电调节摩擦润滑脂添加剂的研究

IF 6.8 1区工程技术

Friction Pub Date : 2025-08-18 DOI: 10.26599/frict.2025.9441169

Qiangsheng Hu, Qiuyu Shi, Xiangyu Ge, Yanfei Liu, Ziqiang Zhao, Wenzhong Wang, Tianfeng Zhou

{"title":"Study of graphene-family nanomaterials as grease additives for electro-regulated friction","authors":"Qiangsheng Hu, Qiuyu Shi, Xiangyu Ge, Yanfei Liu, Ziqiang Zhao, Wenzhong Wang, Tianfeng Zhou","doi":"10.26599/frict.2025.9441169","DOIUrl":"https://doi.org/10.26599/frict.2025.9441169","url":null,"abstract":"Graphene-family materials show significant potential as electro-regulated lubrication additives due to their tunable properties under electrical stimuli. However, a comprehensive comparison of their performance in such conditions remains lacking, limiting their broader industrial adoption. This study explores the electro-regulated friction behavior of graphene (GN), graphene oxide (GO), and fluorinated graphene (FG) nanosheets as grease additives. Results indicate that GN additives demonstrated good antifriction and antiwear performance under constant negative electrical stimulation compared to GO and FG additives. It also demonstrates good stability and repeatability in friction regulation under varying electrical conditions, which is attributed to its deposition on contact surfaces, enhancing lubrication. Furthermore, the direction of electrical stimulation affects GN’s oxidation (or defect) level, with reduced oxidation levels (fewer defects) correlating to lower friction. These findings deepen the understanding of graphene-family materials and provide a basis for designing advanced nanoadditives with enhanced electro-regulated performance.","PeriodicalId":12442,"journal":{"name":"Friction","volume":"70 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144898069","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