FrictionPub Date : 2024-02-02DOI: 10.1007/s40544-023-0822-y
Wenxiao Li, Takehiro Morita, Yoshinori Sawae
{"title":"Experimental study on boundary lubricity of superficial area of articular cartilage and synovial fluid","authors":"Wenxiao Li, Takehiro Morita, Yoshinori Sawae","doi":"10.1007/s40544-023-0822-y","DOIUrl":"https://doi.org/10.1007/s40544-023-0822-y","url":null,"abstract":"<p>The boundary lubrication mechanism at the articulating surface of natural synovial joints has been the subject of much discussion in tribology. In this study, to elucidate the lubricating function of the superficial area of articular cartilage and synovial fluid (SF), cartilage specimens were processed with four different treatments: gentle and severe washing with detergent, incubation in NaCl solution, and trypsin digestion to selectively remove certain constituents from the cartilage surface. Subsequently, the frictional characteristics were examined in phosphate-buffered saline (PBS) and SF against glass. Angularly reciprocating sliding tests with a spherical glass probe and square articular cartilage specimens were performed at low contact loads in the mN range to extract the frictional behavior in the superficial area of the cartilage specimens. Meanwhile, the cartilage surface was observed to confirm the effects of treatments on the morphology of the cartilage surface using a fluorescence microscope and water-immersion methods. The coefficient of friction (COF) of the prepared cartilage specimens was varied from 0.05 to over 0.3 in PBS. However, a certain group of cartilage specimens exhibited a low COF of less than 0.1 with limited variation. For the low COF group of specimens, all four treatments increased the COF in PBS to different extents, and fluorescence microscopy revealed that the integrity of the cartilage surface was deteriorated by treatments. This means that the intact cartilage surface had lubricating constituents to maintain low friction, and the removal of such constituents resulted in the loss of the intrinsic boundary lubricity of the cartilage surface. The variation in the COF of the cartilage specimens was suppressed in SF because it had a clear boundary lubrication effect on the cartilage surface. The lubricating effect of SF could be confirmed even after degenerative treatment.</p>","PeriodicalId":12442,"journal":{"name":"Friction","volume":"46 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139710678","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}
FrictionPub Date : 2024-02-02DOI: 10.1007/s40544-023-0780-4
Davide Massocchi, Nora Lecis, Marco Lattuada, Davide Scaglia, Steven Chatterton, Paolo Pennacchi
{"title":"Friction and wear performance of polyether ether ketone (PEEK) polymers in three lubrication regimes","authors":"Davide Massocchi, Nora Lecis, Marco Lattuada, Davide Scaglia, Steven Chatterton, Paolo Pennacchi","doi":"10.1007/s40544-023-0780-4","DOIUrl":"https://doi.org/10.1007/s40544-023-0780-4","url":null,"abstract":"<p>This experimental study investigates the friction and wear of three coatings commonly used in industrial applications, particularly in hydrodynamic bearings. The three materials under investigation were Babbitt, polyether ether ketone (PEEK) reinforced with 15% carbon fibers, and PEEK reinforced with 20% carbon fibers. The first polymer material was extruded, while the other was produced by fused deposition modelling (FDM). The materials were subjected to sliding tests in a pin-on-disc configuration, with a steel ball serving as the counter surface. The tests were conducted at room temperature, with a load of 10 N and under three different lubrication conditions: dry, grease, and oil. The linear speed was set at 0.3 m/s for the dry and semi-solid lubrication tests, while for the oil tests, the speed was set at 0.25 m/s. The greases used had consistency grades of NGLI 000 and NGLI 2. An ISO VG 68 circulation oil was used for the oil lubrication tests. Additionally, thermodynamic analyses were performed under the most severe conditions (i.e., dry) to investigate the steel-Babbitt and steel-PEEK contact.\u0000</p>","PeriodicalId":12442,"journal":{"name":"Friction","volume":"14 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139660265","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}
FrictionPub Date : 2024-01-10DOI: 10.1007/s40544-023-0803-1
Alexander Kovalev, Yu Tian, Yonggang Meng
{"title":"Prediction of ball-on-plate friction and wear by ANN with data-driven optimization","authors":"Alexander Kovalev, Yu Tian, Yonggang Meng","doi":"10.1007/s40544-023-0803-1","DOIUrl":"https://doi.org/10.1007/s40544-023-0803-1","url":null,"abstract":"","PeriodicalId":12442,"journal":{"name":"Friction","volume":"8 3","pages":""},"PeriodicalIF":6.8,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139439948","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}
FrictionPub Date : 2023-12-20DOI: 10.1007/s40544-023-0818-7
Leif Ahme, Erik Kuhn, Miguel Ángel Delgado
{"title":"An approach of the internal friction-dependent temperature changes for conventional and pure biogenic lubricating greases","authors":"Leif Ahme, Erik Kuhn, Miguel Ángel Delgado","doi":"10.1007/s40544-023-0818-7","DOIUrl":"https://doi.org/10.1007/s40544-023-0818-7","url":null,"abstract":"","PeriodicalId":12442,"journal":{"name":"Friction","volume":"16 9","pages":""},"PeriodicalIF":6.8,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138956120","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}
FrictionPub Date : 2023-12-20DOI: 10.1007/s40544-023-0802-2
Bugao Lyu, Xianghui Meng, Jiabao Yin, Yi Cui, Chengen Wang
{"title":"Scuffing failure analysis based on a multiphysics coupling model and experimental verification","authors":"Bugao Lyu, Xianghui Meng, Jiabao Yin, Yi Cui, Chengen Wang","doi":"10.1007/s40544-023-0802-2","DOIUrl":"https://doi.org/10.1007/s40544-023-0802-2","url":null,"abstract":"","PeriodicalId":12442,"journal":{"name":"Friction","volume":"69 9","pages":""},"PeriodicalIF":6.8,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138954732","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}
FrictionPub Date : 2023-12-15DOI: 10.1007/s40544-023-0796-9
Jinbang Li, Ningning Zhou, Janet S. S. Wong
{"title":"Tribological behavior of lubricant-impregnated porous polyimide","authors":"Jinbang Li, Ningning Zhou, Janet S. S. Wong","doi":"10.1007/s40544-023-0796-9","DOIUrl":"https://doi.org/10.1007/s40544-023-0796-9","url":null,"abstract":"","PeriodicalId":12442,"journal":{"name":"Friction","volume":"204 6","pages":""},"PeriodicalIF":6.8,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138997130","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}