Relevant bibliographies by topics / Coefficient Of Friction (COF)

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Coefficient Of Friction (COF)'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 September 2023

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Journal articles on the topic "Coefficient Of Friction (COF)"

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Tan, Adin Ming, Yehuda Weizman, Firoz Alam, and Franz Konstantin Fuss. "The Coefficient of Friction of Soccer Balls." Proceedings 49, no. 1 (2020): 92. http://dx.doi.org/10.3390/proceedings2020049092.

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Nine soccer balls were tested for their friction against a leather sheet, using a force plate. An average normal force of 63.6 N was applied and the movement of the ball had an average velocity of 15 mm/s. Each test was repeated 15 times and the average Coefficient of Friction (COF) was reported. The following results were obtained: Jabulani (COF: 0.62 ± 0.05); Fracas (COF: 0.41 ± 0.01); Ordem 3 (COF: 0.63 ± 0.02); Teamgeist (COF: 0.38 ± 0.01); Brazuca (COF: 0.45 ± 0.01); Kopanya (COF: 0.39 ± 0.01); React (COF: 0.37 ± 0.01); Finale 15 (COF: 0.39 ± 0.06); Vintage T-panel leather ball (COF: 0.41
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Fiagbe, Yesuenyeagbe A. K., and Emmanuel W. Ramde. "FRICTION COEFFICIENT OF MUNICIPAL SOLID WASTE COMPONENTS." International Journal of Engineering Technologies and Management Research 7, no. 7 (2020): 1–7. http://dx.doi.org/10.29121/ijetmr.v7.i7.2020.702.

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Engineering properties of materials includes coefficient of friction (COF) which are basic in design performance of engineering systems. The COF can be considered as very important in design of handling tools. Various types of handling tools and equipment are used at various stages of disposal and treatment of MSW and COF is one critical property. This paper presents estimate of COF of municipal solid waste components. The components of the municipal solid waste are paper, plastic, organic and others. The estimation of the COF was done using an inclino-tribometer. Waste from 16 sample location
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Varriale, Francesco, Stefano Candeo, Gabriele Riva, Jens Wahlström, and Yezhe Lyu. "A Brake System Coefficient of Friction Estimation Using 3D Friction Maps." Lubricants 10, no. 7 (2022): 134. http://dx.doi.org/10.3390/lubricants10070134.

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The coefficient of friction (COF) is one of the core factors in the evaluation of brake system performance. It is challenging to predict the COF, since it is strongly influenced by several parameters such as contact pressure (p), slip rate (v) and temperature (T) that depend on the driving conditions. There is a need for better models to describe how the brake friction varies under different driving conditions. The purpose of this research is to study the possibility of using 3D friction pvT-maps to estimate the COF of a disc brake system under different driving conditions. The 3D friction pvT
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Fang, Kun. "Frictional Performance of Polyphenyl Ester Modified Polytetrafluoroethylene." Materials Science Forum 1080 (January 30, 2023): 33–39. http://dx.doi.org/10.4028/p-g7gf9i.

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This paper mainly studied the coefficient of friction (COF), wear performance and frictional vibration performance of polyphenyl ester modified polytetrafluoroethylene under dry friction and water lubrication friction conditions. Polyphenyl ester modified polytetrafluoroethylene composites were prepared by blending 20% polyphenyl ester with polytetrafluoroethylene, and the COF, wear performance and frictional vibration properties of such composites were tested. The results showed that: (1) Under dry friction conditions, as the specific pressure between the friction pairs increased, the volume
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Eun, Jinsu, Jaejin Ryue, Sangsoo Park, and Kikwang Lee. "A Novel Method to Measure the Static Coefficient of Friction for Socks." Sensors 22, no. 15 (2022): 5525. http://dx.doi.org/10.3390/s22155525.

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Mechanical testers have commonly been used to measure the frictional properties of socks. However, the friction values may be susceptible to the level of stretchiness of tested fabrics or human variability. Thus, the aim of this study was to propose a novel method that enables friction measurement of socks in a sock-wearing condition with less human variability effects. Five socks with different frictional properties were chosen. Three experimental ramp tests were performed with an artificial structure shaped like the foot-ankle complex (last) and a ramp tester to quantify the static coefficie
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Schanner, Jonathan, Roman Funke, Andreas Schubert, and Alexander Hasse. "Investigating the Friction Behavior of Turn-Milled High Friction Surface Microstructures under Different Tribological Influence Factors." Journal of Manufacturing and Materials Processing 6, no. 6 (2022): 143. http://dx.doi.org/10.3390/jmmp6060143.

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The coefficient of friction (COF) is an important parameter for mechanical engineers to consider when designing frictional connections. Previous work has shown that a surface microstructuring of the harder friction partner leads to a significant increase in the COF. However, the impact of the changes in the tribological system on the COF are not known in detail. In this study, the tribological influence factors such as the nominal surface pressure, the material pairing, lubrication, and the surface properties of the counterbody are investigated. Microstructuring is applied by turn-milling of a
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do Vale, Joao Luiz, Carlos Henrique da Silva, and Giuseppe Pintaude. "Energetic coefficient of friction applied to cylinder liners lab tests." Industrial Lubrication and Tribology 72, no. 9 (2019): 1103–8. http://dx.doi.org/10.1108/ilt-08-2019-0324.

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Purpose This paper aims to present a proposal for evaluating the coefficient of friction (COF), under a reciprocating test that considers the energy dissipated by the friction force. In addition, this new parameter is compared to average COF, which is often used to evaluate COF in reciprocating tests. Design/methodology/approach Samples of compacted graphite iron were extracted directly from an internal combustion engine block. The piston ring used was a nitrided martensitic stainless steel with an asymmetrical profile, and the lubricant oil was the SAE 30 CF, controlled at 40°C. Different tes
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Swensen, Eric E., Jerry L. Purswell, Robert E. Schlegel, and Ronald L. Stanevich. "Coefficient of Friction and Subjective Assessment of Slippery Work Surfaces." Human Factors: The Journal of the Human Factors and Ergonomics Society 34, no. 1 (1992): 67–77. http://dx.doi.org/10.1177/001872089203400108.

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Research was conducted to determine how well subjects could distinguish between surfaces with different coefficient of friction (COF) values and to evaluate how well subjective ratings of slipperiness correlated with the actual COF values. Thirty-three ironworkers experienced in working and walking on steel surfaces and 23 university students inexperienced with these tasks participated in the study. Subjective slipperiness ratings for a variety of climbing and walking conditions were obtained from the subjects. It was found that subjects could identify differences in the slipperiness of four t
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Chen, Xiang, Zhong Han, Xiuyan Li, and K. Lu. "Lowering coefficient of friction in Cu alloys with stable gradient nanostructures." Science Advances 2, no. 12 (2016): e1601942. http://dx.doi.org/10.1126/sciadv.1601942.

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The coefficient of friction (COF) of metals is usually high, primarily because frictional contacts induce plastic deformation underneath the wear surface, resulting in surface roughening and formation of delaminating tribolayers. Lowering the COF of metals is crucial for improving the reliability and efficiency of metal contacts in engineering applications but is technically challenging. Refining the metals’ grains to nanoscale cannot reduce dry-sliding COFs, although their hardness may be elevated many times. We report that a submillimeter-thick stable gradient nanograined surface layer enabl
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Li, Kai Way, Hsuan Cheng Lin, Ching Chung Chen, Li Wen Liu, and Chih Yong Chen. "Measurements of Friction Coefficient on Kitchen Floors in Restaurants." Applied Mechanics and Materials 303-306 (February 2013): 773–76. http://dx.doi.org/10.4028/www.scientific.net/amm.303-306.773.

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Friction measurements in the field were conducted in twelve restaurants in Taiwan. Four restaurants for each of the Chinese style, western style, and western style fast food restaurant were visited. The Brungraber Mark II slipmeter was adopte to measure the coefficient of friction (COF) in three areas in each of the restaurant. The results showed that three, two Chinese style and one western style, of the restaurants had mean COF lower than 0.5, a safety standard commonly adopted in the USA. Engineering/managerial interventions are required for those restaurants as far as employee safety is co
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Dissertations / Theses on the topic "Coefficient Of Friction (COF)"

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Cardoso, Ana Paula Domingos. "Aços galvanizados com aplicação de pós-tratamento para melhoria da estampabilidade em processos de conformação na indústria automobilística." Universidade do Estado de Santa Catarina, 2013. http://tede.udesc.br/handle/handle/1651.

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Made available in DSpace on 2016-12-08T17:19:21Z (GMT). No. of bitstreams: 1 Ana Paula Domingos Cardoso.pdf: 8690501 bytes, checksum: b120ead6518f05e5ff1cb9d530fa6bfe (MD5) Previous issue date: 2013-12-17<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The present work aims to develop and characterize galvanized steels with chemical post-treatment application, which provides to the metal forming improvement properties. The main reason for this development is related with the fact that the most of zinc coatings problems are related with their sensitivity for abrasion wear du
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Paes, Eliel dos Santos. "Ultra baixo coeficiente de atrito no deslizamento de Si3N4-Al2O3. Efeitos da força aplicada, velocidade de deslizamento e temperatura do ensaio." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/3/3151/tde-16112012-115902/.

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Foram realizados ensaios tribológicos de deslizamento do par Si3N4-Al2O3, lubrificado com água, na configuração esfera contra disco, sendo a esfera de nitreto de silício e o disco de alumina para investigar a influência da velocidade de deslizamento, da carga aplicada e da temperatura no coeficiente de atrito. As esferas de nitreto de silício e os discos de alumina foram caracterizados determinando-se: densidades, dureza Vickers, módulo de elasticidade e tenacidade à fratura. Os ensaios foram realizados com rugosidade inicial nos discos de Rrms = 352 nm. O regime de ultra baixo coeficiente de
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Ogata, Paulo Henrique. "Compósitos ferro-grafita para componentes de motores com propriedades tribológicas melhoradas." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-16112015-155422/.

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A constante busca por motores com maior eficiência energética, requer a introdução de novos materiais ou inovações nas rotas de fabricação dos materiais existentes. O presente trabalho busca, a partir de rotas de tratamento térmico, soluções para minimizar o desgaste originado no contato entre corpos metálicos em componentes submetidos a altas pressões de contato em regime lubrificado. A modificação microestrutural a partir de tratamentos térmicos originou matriz martensítica relativamente dura com uma dispersão refinada de nódulos esféricos de grafita, que atuariam como lubrificantes sólidos.
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Balarini, Junior Roberto. "Ultra baixo coeficiente de atrito no deslizamento de Si3N4 Al2O3 em água: estudo ab initio do running-in." Universidade Federal do Espírito Santo, 2013. http://repositorio.ufes.br/handle/10/6236.

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Made available in DSpace on 2016-12-23T14:08:11Z (GMT). No. of bitstreams: 1 Roberto Balarini Junior - Parte 1.pdf: 4732272 bytes, checksum: 0c0798e2e5b19f7834c4ce1d56156d8f (MD5) Previous issue date: 2013-11-27<br>Este trabalho é uma investigação tribológica envolvendo o par cerâmico composto por esferas de nitreto de silício (Si3N4) deslizando contra discos de óxido de alumínio (Al2O3) em água. No total, dez ensaios foram conduzidos com a intenção de reproduzir o fenômeno de Ultra Baixo Coeficiente de Atrito (UBCA) em laboratório, o qual é caracterizado pela obtenção de valores de coeficie
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Grzeskiewicz, Ronald. "Effect of hydrogen on the coefficient of friction of iron." Thesis, This resource online, 1988. http://scholar.lib.vt.edu/theses/available/etd-04122010-083727/.

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Dorton, David W. "Experimental evaluation of effective friction coefficient for liquid ring seals." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-08042009-040326/.

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Lång, Marcus. "Static Friction in Slip Critical Bolt Joints : Coefficient of Friction in Steel, Aluminium and ED Coated Steel." Thesis, Karlstads universitet, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-55223.

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This project was performed together with ÅF Industry AB in Trollhättan, Sweden. ÅF’s expertise in Trollhättan is oriented towards the automotive industry. It was conducted within the section of CAE and safety where they, for instance, dimension bolt joints in the cars. Bolt joints play an important role in the automotive industry. Slip critical bolt joints are used widely throughout the vehicles. With lack of good test data, the bolt joints need to be dimensioned conservatively. This may lead to that bolt joints are over-dimensioned, adding more mass to the car. On the contrary, the availabili
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Peterson, Eric W. "Tire-Road Friction Coefficient Estimation Using a Multi-scale, Physics-based Model." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/51148.

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The interaction between a tire and road surface is of critical importance as the motion of a car in both transient and steady-state maneuvers is predicated on the friction forces generated at the tire-road interface. A general method for predicting friction coefficients for an arbitrary asphalt pavement surface would be an invaluable engineering tool for designing many vehicle safety and performance features, tire design, and improving asphalt-aggregate mixtures used for pavement surfaces by manipulating texture. General, physics-based methods for predicting friction are incredibly difficult,
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Oliver, William B. "An experimental investigation of the static coefficient of friction for sheetpile interlocks." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/104522.

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Koubek, Radek, and Karolina Dedicova. "Friction of wood on steel." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-35094.

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This thesis deals with the experimental description of friction between steel and wood materials, specifically laminated veneer lumber (LVL) and pine wood with two types of annual rings. It studies the influence of a number of different parameters on the coefficient of friction such as contact pressure, moisture content, fiber orientation in relation to the load direction, steel surface roughness, and horizontal load rate. First, the theoretical mechanical and physical properties as well as the coefficient of friction itself are described. This is followed by the description of the test setup
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Books on the topic "Coefficient Of Friction (COF)"

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Forland, Kathryn A. Kinetic friction coefficient of ice. US Army Corps of Engineers, Cold Regions Research & Engineering Laboratory, 1985.

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B, Oswald Fred, Townsend Dennis P, and United States. National Aeronautics and Space Administration., eds. Measurement of gear tooth dynamic friction. National Aeronautics and Space Administration, 1996.

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Healy, Alan Gerard. An investigation of methods of measuring the coefficient of friction of roadstone. Queen Mary and Westfield College, 1997.

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Nagel, F. A method for the approximate calculation of the skin friction coefficient of horizontal wavy plates. von Karman Institute for Fluid Dynamics, 1987.

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Miyoshi, Kazuhisa. Durability evaluation of selected solid lubricating films. National Aeronautics and Space Administration, Glenn Research Center, 2001.

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L, Thom R., and George C. Marshall Space Flight Center., eds. Database for the tribological properties of self-lubricating materials. National Aeronautics and Space Administration, Marshall Space Flight Center, 1998.

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L, Thom R., and George C. Marshall Space Flight Center., eds. Database for the tribological properties of self-lubricating materials. National Aeronautics and Space Administration, Marshall Space Flight Center, 1998.

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Zaharioudakis, Nikolaos I. An investigation of performance of aggregate mixtures by measuring their skid-resistance and coefficient of friction. Queen Mary and Westfield College, 1998.

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Miyoshi, Kazuhisa. Surface chemistry, friction, and wear properties of untreated and laser-annealed surfaces of pulsed-laser-deposited WS₂ coatings. National Aeronautics and Space Administration, 1996.

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Miyoshi, Kazuhisa. Surface chemistry, friction, and wear properties of untreated and laser-annealed surfaces of pulsed-laser-deposited WS₂ coatings. National Aeronautics and Space Administration, 1996.

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Book chapters on the topic "Coefficient Of Friction (COF)"

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Ahmad, Norazrin Azwani, Masine Md. Tap, Ardiyansyah Syahrom, and Jafri Mohd. Rohani. "The Relationship Between Coefficient of Friction (COF) with Floor Slipperiness and Roughness." In Quantitative and Qualitative Factors that Leads to Slip and Fall Incidents. Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-3286-8_3.

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Blau, Peter J. "Friction Coefficient." In Encyclopedia of Tribology. Springer US, 2013. http://dx.doi.org/10.1007/978-0-387-92897-5_169.

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Gooch, Jan W. "Friction Coefficient." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_5316.

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Gooch, Jan W. "Coefficient of Friction." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_2533.

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Man, George, and Mao-Qiang Man. "Skin Friction Coefficient." In Agache's Measuring the Skin. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-32383-1_20.

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Shang, De-Yi, and Liang-Cai Zhong. "Skin-Friction Coefficient." In Heat and Mass Transfer. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-94403-6_7.

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Shang, De-Yi, and Liang-Cai Zhong. "Skin-Friction Coefficient." In Heat Transfer of Laminar Mixed Convection of Liquid. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-27959-6_9.

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Man, George, and Mao-Qiang Man. "Skin Friction Coefficient." In Agache’s Measuring the Skin. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-26594-0_20-1.

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Gooch, Jan W. "Coefficient of Friction, Kinetic." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_2534.

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Gooch, Jan W. "Coefficient of Friction, Static." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_2535.

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Conference papers on the topic "Coefficient Of Friction (COF)"

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Cummings, Scott, Tom McCabe, Glenn Guelde, and Dan Gosselin. "Brake Shoe Coefficient of Friction Variation." In ASME 2009 Rail Transportation Division Fall Technical Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/rtdf2009-18022.

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A series of dynamometer tests were conducted by the Wheel Defect Prevention Research Consortium (WDPRC) to quantify the amount of expected variation in brake shoe coefficient of friction (COF) and resulting wheel temperature throughout the life of an individual brake shoe. Variations in brake shoe COF within an individual railcar are one potential source of elevated wheel temperatures and thermal mechanical shelling (TMS) damage to the wheels. High friction composition and tread conditioning brake shoes were installed in the “as manufactured” condition with no wear-in or machining at the begin
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Marinack, Martin C., Patrick S. M. Dougherty, and C. Fred Higgs. "Single Particle Interaction Properties: Investigations on the Coefficient of Restitution and Coefficient of Friction." In ASME/STLE 2012 International Joint Tribology Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ijtc2012-61165.

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Understanding granular flows has always been important for predicting natural phenomena such as rockslides and soil erosion, as well as industrial processes such as coal-based fossil fuel systems and solids processing. As such, it becomes important to understand granular flows from both a classical granular flow and tribological perspective. Inherently important in the study of granular flows is the study of the individual particle level interactions, which define the global behavior of the flow. The current work examines both the coefficient of restitution (COR) and coefficient of friction (C
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Lee, HyunWook, Corina Sandu, Carvel Holton, and Mehdi Ahmadian. "An Empirical Approach to Modeling the Friction Coefficient for Wheel-Rail Contact." In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-86429.

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The coefficient of friction (CoF) is one of the most important parameters for the contact between the wheel and the rail. Accurate estimation or measurement of the CoF has a very important role, both in terms of modeling the train dynamics and in terms of reducing operational costs in the long-term. For ease of implementation, since the nature of the wheel-rail contact dynamics is very complex, the assumption of a constant CoF is still used in most theoretical studies. Nevertheless, experimental work indicates that the CoF depends on dynamic changes in various wheel-rail conditions, like slidi
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Ishida, Makoto, Fusayoshi Aoki, Yasutomo Sone, Takumi Ban, and Kensuke Shirouzu. "Rail Corrugations Caused by Low Coefficient of Friction in a Submarine Railway Tunnel." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-64346.

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One of some types of rail corrugations is caused on railway rail surface in a submarine tunnel. It poses a large problem from the aspects of railway vehicle and railway track deterioration. In this paper, the mechanism of the rail corrugations was studied with the focus placed on roll-slip of wheel and rail interface. Traction and vertical force interacting between wheel and rail were investigated by a vehicle/track interaction model, and the coefficient of friction (COF) on rail surface was measured. Also, the rail surface was analysed with infrared to understand the chemical composition of s
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Waikar, R. A., and Y. B. Guo. "The Effect of Machining Induced White Layer on Frictional and Wear Performance at Dry and Lubricated Sliding Contact." In ASME/STLE 2009 International Joint Tribology Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/ijtc2009-15112.

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A white layer on a machined surface is often produced at abusive machining conditions. However, the effect of white layer on frictional and wear performance has received little attention. This study has shown that the existence of a turned white layer slightly decreases the coefficient of friction (COF), while a ground white layer significantly increases COF at dry conditions. At lubricated conditions, the turned white layer only slightly increases COF while the ground white layer slightly reduces it. The third body wear debris may act as solid lubricants leading to reduced friction.
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Lorenço, Marcelo A., Paulo R. Barbosa, Adilson R. Costa, Rafael H. M. Siqueira, and Milton S. F. Lima. "Effects of a laser surface treatment in a press-hardened steel on the coefficient of friction." In Latin America Optics and Photonics Conference. Optica Publishing Group, 2022. http://dx.doi.org/10.1364/laop.2022.m4c.4.

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Singh, Gurjeet, and Kurt Beschorner. "Influence of Hydrodynamic Fluid Pressure and Shoe Tread Depth on Available Coefficient of Friction." In ASME/STLE 2012 International Joint Tribology Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ijtc2012-61173.

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Slip and fall accidents are a major occupational health concern. Identifying the lubrication mechanisms affecting shoe-floor-contaminant friction under biofidelic (testing conditions that mimic human slipping) conditions is critical to identifying unsafe surfaces and designing a slip-resistant work environment. The purpose of this study is to measure the effects of varying tread design, tread depth and fluid viscosity on underfoot hydrodynamic pressure, the load supported by the fluid (i.e. load carrying capacity), and the coefficient of friction (COF) during a simulated slip. A single vinyl f
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Shafiei, M., and A. T. Alpas. "Friction and Wear Behaviour of Nanocrystalline Nickel." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-64315.

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The tribological behaviours of conventional nickel with a grain size of 20±5 μm and nanocrystalline (nc) nickel with a grain size of 15±3 nm were compared. A pin-on-disc tribometer was employed for the friction and wear measurements under unlubricated conditions in ambient air with ∼35% relative humidity. As the grain size was decreased to the nanometer size, a reduction of about 18% was observed in the peak value of coefficient of friction (COF), but the steady-state COF remained almost unchanged. Also it was shown that the wear rate of nc nickel was about 82% lower than that of conventional
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Lee, HyunWook, Corina Sandu, and Carvel Holton. "Wheel-Rail Dynamic Model and Stochastic Analysis of the Friction in the Contact Patch." In 2010 Joint Rail Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/jrc2010-36229.

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The coefficient of friction (CoF) is one of the most important parameters for characterizing the contact between the wheel and the rail. The assumption of a constant CoF is still used in most theoretical studies, although experimental work indicates that the CoF depends on material and dynamic parameters. In the real world, accurate estimation of the CoF is not simple due to various uncertainties. In this paper we present a new 3D nonlinear dry CoF model at the wheel-rail contact. In addition, a stochastic analysis using the polynomial chaos theory is performed with the CoF model. The maximum
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Handoko, Budi Basuki, and Rini Dharmastiti. "Numerical Study on the Effects of Coefficient of Friction to the Dynamic Sliding Contact between Bearing and Talar Components of Metal on Polymer Total Ankle Replacement Implants." In International Conference on Mechanical Engineering. Trans Tech Publications Ltd, 2023. http://dx.doi.org/10.4028/p-s80w27.

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Coefficient of friction (cof) is an important variable when dealing with con-tact between mechanical parts. It depends on various tribological variables and the value can be determined only by experiments. Cof correlates with the wear of material and this is a severe problem in biomedical engineering. This research numerically studied the effects of cof between talar and bear-ing in the total ankle replacement (TAR) implants. The aim is to evaluate the contact situations affected by cof. The TAR models consist of cobalt chrome (CoCr) alloy and ultra high molecular weight polyethylene (UHMWPE)
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Reports on the topic "Coefficient Of Friction (COF)"

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Wei, Fulu, Ce Wang, Xiangxi Tian, Shuo Li, and Jie Shan. Investigation of Durability and Performance of High Friction Surface Treatment. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317281.

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The Indiana Department of Transportation (INDOT) completed a total of 25 high friction surface treatment (HFST) projects across the state in 2018. This research study attempted to investigate the durability and performance of HFST in terms of its HFST-pavement system integrity and surface friction performance. Laboratory tests were conducted to determine the physical and mechanical properties of epoxy-bauxite mortar. Field inspections were carried out to identify site conditions and common early HFST distresses. Cyclic loading test and finite element method (FEM) analysis were performed to eva
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Dumas, Alexis, André Bégin-Drolet, and Julien Lépine. Development of a ski testing machine based on the effective friction coefficient for classic cross-country skis. Purdue University, 2022. http://dx.doi.org/10.5703/1288284317548.

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Kedzierski, Mark A., and Donggyu Kang. Horizontal convective boiling of R1234yf, R134a, and R450A within a micro-fin tube :. National Institute of Standards and Technology (U.S.), 2017. http://dx.doi.org/10.6028/nist.tn.1966.

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This report presents local convective boiling heat transfer and Fanning friction factor measurements in a micro-fin tube for R134a and two possible low global warming potential (GWP) refrigerant replacements for R134a: R1234yf and R450A. Test section heating was achieved with water in either counterflow or in parallel flow with the test refrigerant to provide for a range of heat fluxes for each thermodynamic quality. An existing correlation from the literature for single and multi-component mixtures was shown to not satisfactorily predict the convective boiling measurements for flow qualities
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Cao Romero, Julio A., Jorge Reyes-Avendaño, Julio Soriano, Leonardo Farfan-Cabrera, and Ali Erdemir. A Pin-on-Disc Study on the Electrified Sliding Wear of EVs Powertrain Gears. SAE International, 2022. http://dx.doi.org/10.4271/2022-01-0320.

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In contrast to conventional powertrains from internal combustion engine vehicles (ICEV), the tribological performance of powertrains of electric vehicles (EVs) must be further evaluated by considering new critical operating conditions such as electrical environments. The operation of any type of electric motor produces shaft voltages and currents due to various hardware configurations and factors. Furthermore, the common application of inverters intensifies this problem. It has been reported that the induced shaft voltages and currents can cause premature failure problems in tribological compo
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EFFECT OF RANDOM PRE-STRESSED FRICTION LOSS ON THE PERFORMANCE OF A SUSPEN-DOME STRUCTURE. The Hong Kong Institute of Steel Construction, 2022. http://dx.doi.org/10.18057/ijasc.2022.18.1.5.

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The key to the high-efficiency performance of the suspen-dome structure is to apply the pre-stressed design value to the structure accurately. However, engineering practice has found that the use of tensioning hoop cables to apply the pre-stress will produce noticeable pre-stressed friction loss (PFL), which significantly affects the safety performance of the structure. In this paper, based on a 1:10 scaled-down experiment model of a suspen-dome structure with rolling cable-strut joint installed, the random PFL (RPFL) effect of the suspen-dome on structure performance was analyzed through a pr
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