Relevant bibliographies by topics / Elastohydrodynamical lubrication

Contents

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

Academic literature on the topic 'Elastohydrodynamical lubrication'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

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Journal articles on the topic "Elastohydrodynamical lubrication"

1

Guo, F., and P. L. Wong. "An Anomalous Elastohydrodynamic Lubrication Film: Inlet Dimple." Journal of Tribology 127, no. 2 (April 1, 2005): 425–34. http://dx.doi.org/10.1115/1.1866165.

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This paper presents a deliberately designed elastohydrodynamical lubrication (EHL) experiment for the study of the individual effect of the limiting shear stress and wall slippage. Very slow entrainment speeds were employed to avoid influential shear heating and oils of high viscosities were chosen to ensure that the conjunction was under typical EHL. An anomalous EHL film, characterized by a dimple at the inlet region, was obtained. Literature revealed that this inlet dimple was reported in some numerical studies taking into consideration the limiting-shear-stress characteristics of the lubricant and wall slippage. It was found that even under the same kinematic conditions, different types of film shape would be generated by simple disc sliding and simple ball sliding. Simple disc sliding produces an inlet dimple with a comparatively thick inlet film thickness, which droops rapidly toward the outlet region. For simple ball sliding, there is also an inlet dimple but the central film thickness is rather uniform. However, by prerunning the conjunction at a zero entrainment velocity (at the same linear speeds but in opposite directions) before the sliding experiment, the slope of the central film of simple disc sliding becomes smaller. It is probably due to the modification of solid-liquid interface, i.e., the slippage level, by the highly pressurized and stressed prerunning conditions. With a prescribed prerunning, which can produce very similar films at simple disc sliding and simple ball sliding, variation of film thickness was studied and it was found that the inlet dimple film has obvious dependence on entrainment speeds, but was not sensitive to loads. The present experimental results can be considered as direct evidence for those numerical findings of the inlet dimple. Tentatively, an effective viscosity wedge is proposed to account for the formation of the inlet dimple.
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Auger, D. D., D. Dowson, J. Fisher, and Z.-M. Jin. "Friction and Lubrication in Cushion Form Bearings for Artificial Hip Joints." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 207, no. 1 (March 1993): 25–33. http://dx.doi.org/10.1243/pime_proc_1993_207_265_02.

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Two hip joint prostheses were designed and constructed to be elastohydrodynamically equivalent producing approximately equal initial contact areas and theoretical film thicknesses. One was made from conventional UHMWPE (ultra-high molecular weight polyethylene) and the other was a cushion component which had a low modulus layer introduced into the joint space. Friction measurements were carried out on a pendulum simulator apparatus and the two joints were compared. In addition the experimental results were compared with theoretical values of friction predicted from elastohydrodynamic lubrication theory. Values for the friction factor at peak load and peak velocity in the cushion cup (0.003–0.009) were much lower than in the UHMWPE cup (0.017–0.042). The low friction values in the cushion cup are consistent with fluid film lubrication in the contact with the thin lubricating film being preserved by microelastohydrodynamic action.
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Kim, Seong Su, Juh Wan Choi, Sung Soo Rhim, and Jin Hwan Choi. "Numerical Modeling of Piston Lubrication with Body Deformation through Modal Reduction Method." Key Engineering Materials 739 (June 2017): 193–201. http://dx.doi.org/10.4028/www.scientific.net/kem.739.193.

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An analysis for operating characteristics of piston lubrication system is performed based on the numerical model in this study. Dynamic piston lubrication characteristics such as oil film pressure and thickness distribution can be analyzed through a numerical model with an integration of elastohydrodynamics and multi-flexible-body dynamics (MFBD). In particular, the oil film thickness variation by elastic deformation is considered in the elastohydrodynamic analysis by using the modal reduction method in MFBD system. And this effect is reflected on the fluid governing equations to evaluate the oil film pressure in the lubrication region. A series of process proposed in this study is available for the analysis of realistic elastohydrodynamic lubrication phenomenon. A numerical example for the piston lubrication system is also demonstrated.
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Ji, Fen Zhu, Yu Chen Guo, Fa Rong Du, Shu Chun Yang, and Bin Xu. "Research on the Performance of Space Liquid Lubrication System with Oil-Storage." Advanced Materials Research 479-481 (February 2012): 2393–97. http://dx.doi.org/10.4028/www.scientific.net/amr.479-481.2393.

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The gravity oil feed method dose not suit for microgravity environment as the same way dose for ground lubrication system. It is the key problem to be solved that how to supply the oil to friction surface in space liquid lubrication system. It analyzed the lubricating manner. A space liquid lubrication system was designed based on a principle of using deformation energy to supply oil. In the analysis of its basic structure and operating principle, the film calculation mode was established based on the elastohydrodynamic lubrication theory. The lubricating performance was simulated by ANSYS finite element analysis software in microgravity. The calculation results show that: in the microgravity, it could achieve elastohydrodynamic lubrication on friction surface in this lubrication system. When the oil supply hole diameter is 2mm, the film-thickness ratio changes between 1.91 and 4.28. It belongs to elastohydrodynamic lubrication. The hole diameter decreases, the film thickness reduces. The minimum film-thickness ratio is 0.93 when the temperature changes widely from -50°C~+80°C. It belongs to boundary lubrication state.
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Choi, Juh Wan, Seong Su Kim, Sung Soo Rhim, and Jin Hwan Choi. "Numerical Model of Journal Bearing Lubrication Considering a Bending Stiffness Effect." Applied Mechanics and Materials 284-287 (January 2013): 854–60. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.854.

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An analysis for operating characteristics of journal bearing lubrication system is performed based on the numerical model. Dynamic bearing lubrication characteristics such as oil film pressure and thickness distribution can be analyzed through a numerical model with an integration of elastohydrodynamics and multi-flexible-body dynamics (MFBD). In particular, the oil film thickness variation by elastic deformation is considered in the elastohydrodynamic analysis by applying the bending stiffness effect of journal. And the oil film thickness variation by the bending stiffness effect is applied to the fluid governing equations to calculate the oil film pressure in the elastohydrodynamic lubrication region. A series of process proposed in this study is available for the analysis of realistic elastohydrodynamic lubrication phenomenon. Also, a numerical example for the journal bearing lubrication system is demonstrated and compared with the experimental results. The numerical results considering the bending stiffness effect show a good agreement with the experimental results.
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Yang, Fuqin, Dexing Hu, Qianhao Xiao, and Shun Zhao. "Experimental study on line-contact elastohydrodynamic grease lubrication properties of surface-textured rollers." Industrial Lubrication and Tribology 73, no. 3 (January 25, 2021): 477–84. http://dx.doi.org/10.1108/ilt-03-2020-0079.

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Purpose This paper aims to study line-contact elastohydrodynamic grease lubrication properties of surface-textured rollers as well as the effect of different crown widths (dw) on oil film thickness under textured conditions. Design/methodology/approach The laser processing method was used to make the micro-texture on the surface of GCr15 steel rollers; lithium grease was used as the lubricant, and line-contact elastohydrodynamic grease lubrication experiments under pure sliding conditions were performed on light interference elastohydrodynamic-lubricated experimental table. Findings The results show that the line-contact elastohydrodynamic grease lubrication is closely related to the textured crown width of steel rollers. At low speeds and light loads, texturing has an inevitable inhibitory effect on the formation of the lubricating oil film, and the smaller the width of the crown area, the more obvious the inhibitory effect, which is not conducive to the improvement of the lubrication condition. At high speeds and high loads, the textured roller with dw = 1 mm has the largest oil film thickness and shows better lubrication performance. Originality/value At present, there is little research on the surface texture of line-contact friction pairs. This work explores the effect of different textured crown width on the lubricating properties of line-contact elastohydrodynamic grease lubrication by experiment. It provides a new theoretical basis for the subsequent practical application of surface texture technology.
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Chang, L. "Traction in Thermal Elastohydrodynamic Lubrication of Rough Surfaces." Journal of Tribology 114, no. 1 (January 1, 1992): 186–91. http://dx.doi.org/10.1115/1.2920859.

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This paper studies the traction behavior of elastohydrodynamically lubricated line contacts between two rough surfaces. The study uses a thermal micro-elastohydrodynamic-lubrication (micro-EHL) model and obtains traction coefficients for a wide range of operating conditions and for film parameters as small as 1.50. The simulation results suggest that the traction is generally insensitive to the roughness structure and magnitude as long as the contact maintains a full EHL film. The results also indicate clearly that the lubricant squeeze induced by the motion and interaction of rough surfaces significantly affects the numerical solutions to thermal micro-elastohydrodynamic lubrication.
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Wang, S., Y.-Z. Hu, and Q.-C. Tan. "Frictional behaviour of engineering surfaces in overall lubrication regimes of point contacts." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 225, no. 11 (September 23, 2011): 1071–80. http://dx.doi.org/10.1177/1350650111414333.

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The aim of the present paper is to study experimentally and numerically the frictional behaviour of engineering surfaces within all lubrication regions of point contacts. For this reason, a numerical solution proposed elsewhere by the current authors, which can predict friction under the different lubrication modes of elastohydrodynamic, mixed, and boundary lubrications, is introduced. Based on a deterministic model of mixed lubrication, the solution was combined with the variation of the lubricating films’ physical state during the transition of lubrication modes. Results show that roughness amplitude has a great effect on the transition of friction regimes. In addition, it is also observed that variation of the friction coefficient has nearly the same trend as the true contact area ratio in the mixed lubrication state. Meanwhile, it is concluded that transverse roughness has better film-forming capacity than longitudinal roughness and thus leads to a lower magnitude of friction coefficient if the operating conditions are the same. Analysis of the mechanism of friction behaviour suggests that the true contact area ratio determines the friction behaviour of engineering surfaces in mixed lubrication. In smooth contacts, the comparison of experiment tests and simulation results suggests that friction variation results from gradual change of the liquid lubricant to solid-like matter with diminishing film thickness.
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Jia, Fuchun, Yulong Lei, Yao Fu, Binyu Wang, and Jianlong Hu. "Demand Analysis of Lubricating Oil in Spur Gear Pairs." Applied Sciences 10, no. 16 (August 5, 2020): 5417. http://dx.doi.org/10.3390/app10165417.

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Theoretical calculation and numerical simulation are used to investigate the lubricating oil demand of spur gears. In accordance with the function of lubricating oil during the meshing process, oil demand is regarded as the superposition of oil for lubrication and cooling. Oil for lubrication is calculated in accordance with meshing and elastohydrodynamic lubrication (EHL) theories. Oil for cooling is obtained from friction heat. The influence of different meshing positions on lubricating oil demand is analysed, and the effects of modulus, tooth number, transmission ratio, input speed and input torque on lubricating oil demand is investigated using a control variate method. Simulation results indicated that oil for lubrication and oil for cooling have two maxima each during a meshing circle. The influences of different gear parameters and working conditions on lubricating oil demand are compared. The results showed that the oil volume for lubrication increases and oil volume for cooling decreases as the modulus, tooth number and transmission ratio of the gear increase, the oil volume for lubrication and oil volume for cooling increases as the input speed and input torque increase.
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Miao, Nai Ming. "Research and Development of Overloading Velocity Jump Line Contact Elastohydrodynamic Lubrication Testbed." Applied Mechanics and Materials 713-715 (January 2015): 182–86. http://dx.doi.org/10.4028/www.scientific.net/amm.713-715.182.

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To research the lubricating property of line contact elastohydrodynamic lubrication under the working conditions of overloading velocity jump, based on the optic elastohydrodynamic experimental apparatus developed by the research group, an measuring equipment applicable to the oil film thickness and shape under the condition of overloading velocity jump is designed and developed. This testbed is mainly composed of glass block reciprocating motion system, ball or roller rotary rolling system, loading system, speed regulating system, light source system and image acquisition system. The motion part replaces the slider-crank mechanism with kad-screw mechanism and is driven by stepper motor, so as to realize the different working conditions of velocity jump. The developed platform was adopted to carry out the velocity jump line contact elastohydrodynamic lubrication test by the driving of the stepping motor, investigating the influence of line contact friction pair on the lubricating oil film at the moment of acceleration under the overloading working condition.
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Dissertations / Theses on the topic "Elastohydrodynamical lubrication"

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Brhlík, Rostislav. "MKP simulace elastohydrodynamického kontaktu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231788.

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This diploma thesis deals with an application of the finite element method on elastohydrodynamic (EHD) lubrication simulations. Commercially available software COMSOL is used for the computation, while two different modules for modeling EHD lubrication are described in a detail. Firstly, a new approach using the module Thin-Film Flow is developed, considering and describing some limitations of this approach. This is the very first published work dealing complex with EHD simulation in Thin-Film Flow module. In the second part of the thesis, there was created a model of line contact using the module for the introduction of partial differential equations (PDE). The model is partially verified with available works for different values of the input parameters. Subsequently, the velocity effect of the contact surfaces on the pressure and the lubricant thickness in contact is analyzed. Finally, the last part is examines the influence of the values of some parameters on the final value of the contact pressure and the lubricant thickness, as well as on numerical stability of the entire model.
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Roberts, H. "Elastohydrodynamic lubrication." Thesis, University of Liverpool, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356293.

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Richmond, J. W. "Traction in elastohydrodynamic lubrication." Thesis, University of Reading, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356067.

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Björling, Marcus. "Friction in Elastohydrodynamic Lubrication." Doctoral thesis, Luleå tekniska universitet, Maskinelement, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-17478.

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Today, with increasing demands on industry to reduce energy consumption and emissions, the strive to increase the efficiency of machine components is maybe bigger than ever. This PhD thesis focus on friction in elastohydrodynamic lubrication (EHL), found in, among others, gears, bearings and cam followers. Friction in such contacts is governed by a complex interaction of material, surface and lubricant parameters as well as operating conditions. In this work, experimental studies have been conducted that show how friction varies over a wide range of running conditions when changing parameters like lubricant viscosity, base oil type, surface roughness and lubricant temperature. These measurements have also been used to predict the friction behaviour in a real gear application. Numerical modeling of elastohydrodynamic (EHD) friction and film thickness are important for increased understanding of the field of EHL. Due to the high pressure and shear normally found in EHD contacts it is crucial that appropriate rheological models are used. An investigation has been carried out in order to assess the friction prediction capabilities of some of the most well founded rheological models. A numerical model was used to predict friction coefficients through the use of lubricant transport properties. Experiments were then performed that matches the predicted results rather well, and the deviations are discussed. The numerical model in combination with experimental measurements are used to investigate the friction reducing effect of diamond like carbon (DLC) coatings in EHL. A new mechanism of friction reduction through thermal insulation is proposed as an alternative to the current hypothesis of solid-liquid slip. These findings opens up for new families of coatings where thermal properties are in focus that may be both cheaper, and more effective in reducing friction in certain applications than DLC coatings of today.
Godkänd; 2014; 20140825 (marbjo); Nedanstående person kommer att disputera för avläggande av teknologie doktorsexamen. Namn: Marcus Björling Ämne: Maskinelement/Machine Elements Avhandling: Friction in Elastohydrodynamic Lubrication Opponent: Professor H P Evans, Cardiff School of Engineering, Cardiff University, Cardiff, Wales, UK Ordförande: Professor Roland Larsson, Institutionen för teknikvetenskap och matematik, Luleå tekniska universitet Tid: Torsdag den 2 oktober 2014, kl 09.00 Plats: E231, Luleå tekniska universitet
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Hartinger, Markus. "CFD modelling of elastohydrodynamic lubrication." Thesis, Imperial College London, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444143.

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Usually elastohydrodynamic lubrication (EHL) is modelled using the Reynolds equation for the fluid flow and the elastic deformation is calculated following the Hertzian contact theory. In this thesis a CFD approach for modelling EHL is established. The full Navier-Stokes equations are used which enables the entire flow domain to be modelled and which can resolve all gradients inside the contact. Liquid properties are introduced where the viscosity is piezo-viscous, shear-thinning and temperature dependent and where the density is a function of pressure. The phenomenon of cavitation is taken into account by two homogeneous equilibrium cavitation models which are compared with each other. For one cavitation model an energy equation is developed which considers the effects of heat conduction and convection, viscous heating and the heat of evaporation. The Hertzian contact theory is implemented and parallelised within the CFD method and validated against analytical solutions. Then, the cavitation models and the Hertzian contact theory are occupied together in a forward iterative manner. The developed method is applied to glass-on-steel and metal-on-metal line contacts and isothermal results are compared to the Reynolds theory. Very good agreement was found with the Reynolds theory in most cases. For high viscosity, high velocity and rolling conditions small differences to the Reynolds theory were found. The influence of temperature is studied for a series of test cases and the results are compared to their isothermal counterparts. All thermal calculations under sliding conditions developed a temperature-induced shear-band which is closer towards the slower, thus hotter, surface. The thermal, high viscosity calculations under sliding conditions showed significant pressure variation across the film thickness due to very large viscosity gradients. The impact of temperature on the friction force is very significant. Results of a three-dimensional, isothermal point contact are shown to demonstrate the feasibility of such calculations. The developed method is capable of giving new insights into the physics of elastohydrodynamic lubrication, especially in cases where the usual assumptions of the Reynolds theory break down.
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Shieh, Jinn-An. "Film collapse in elastohydrodynamic lubrication /." The Ohio State University, 1992. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487760357820679.

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Košťál, David. "Studium utváření mazacích filmů za podmínek nedostatečného zásobování kontaktu mazivem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229431.

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The purpose of this thesis is to reveal production mechanisms of lubrication films between non-conformal surfaces in situations, when is not possible to designate lubrication regime as fully flooded elastohydrodynamic contact. Under certain conditions of lubrication volume, rolling speeds, temperatures, lubrication properties or loads could lubrication film decrease under values determined by fully flooded formulas. This regime is designated as starvation at it includes risk of increased wear. In this thesis the methodology and the new simulator of starving contact are described. Obtained film thickness results are compared with existing numerical models.
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Kweh, C. C. "Elastohydrodynamic lubrication with fire-resistant fluids." Thesis, Bucks New University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375126.

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Elsharkawy, Abdallah A. "Elastohydrodynamic lubrication of multilayered elastic solids /." The Ohio State University, 1992. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487779914825588.

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Larsson, Roland. "Elastohydrodynamic lubrication under non-steady conditions." Doctoral thesis, Luleå tekniska universitet, Maskinelement, 1996. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18564.

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The six papers presented in this thesis consider the effects on elastohydrodynamic lubrication (ehl) of non-steady conditions. The vast majority of ehl investigations, both experiemental and theoretical, utilise steady state conditions, i.e. constant load, velocity, geometry and temperature. The lubricant is, however, in conditions that are far from those of steady state. Many components operate with varying load, velocity and geometry. Some examples are gears, rolling element bearings, cams and follower mechanisms and reciprocating seals. To predict the operation of these components it is necessary to consider the transient effects. The theory of elastohydrodynamic lubrication under non-steady conditions is presented in this thesis and applied to some practical cases. Papers A and B deal with the simulation of the lubrication in the contact between an impacting ball and a lubricated surface. These investigations give understanding of lubrication under impact loading and also fundamental understanding of the dynamics of an ehl contact. Paper C is an experimental investigation of the impacting ball problem. The deformation of the surfaces in the contact region is studied for different combinations of lubricant viscosities and impact velocities. Paper D and E deal with the breakdown mechanisms of a lubricant film. It is shown that lubricant film failure occurs at high sliding velocities if the load is non-stationary. This contradicts elastohydrodynamic theory since increasing sliding velocity implies increasing entrainment of lubricant and thus thicker lubricant film and less risk for failure. It is, however, shown in Paper E that starvation can be the reason why film failure occurs even if the conjunction is lubricated by a thick layer of lubricant. Paper F is a transient simulation of a meshing involute spur gear. Film thickness, pressure, friction and subsurface stresses are computed at different positions along the line of action. Two different sets of lubricant properties are used, the first one
Godkänd; 1996; 20070219 (rola)
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Books on the topic "Elastohydrodynamical lubrication"

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Rheology and elastohydrodynamic lubrication. Amsterdam: Elsevier, 1991.

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Huang, Ping. Numerical Calculation of Elastohydrodynamic Lubrication. Singapore: John Wiley & Sons Singapore Pte Ltd., 2015. http://dx.doi.org/10.1002/9781118920978.

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Huang, Ping. Numerical calculation methods of elastohydrodynamic lubrication. Chichester, West Sussex: John Wiley & Sons, Inc., 2015.

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Habchi, Wassim. Finite Element Modelling of Elastohydrodynamic Lubrication Problems. Chichester, UK: John Wiley & Sons Ltd, 2018. http://dx.doi.org/10.1002/9781119225133.

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Zaretsky, Erwin V. Bearing elastohydrodynamic lubrication: A complex calculation made simple. [Washington, D.C: National Aeronautics and Space Administration, 1990.

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Leeds), Leeds-Lyon Symposium on Tribology (23rd 1996 University of. Elastohydrodynamics '96: Fundamentals and applications in lubrication and traction. Amsterdam: Elsevier for the Institute of Tribology, the University of Leeds and Institut national des sciences appliquées de Lyon, 1997.

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Fusaro, Robert L. Lubrication of space systems. [Washington, D.C: National Aeronautics and Space Administration, 1995.

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Fundamentals of fluid film lubrication. New York: McGraw-Hill, 1994.

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Fundamentals of fluid film lubrication. Maidenhead: McGraw-Hill, 1994.

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Hamrock, Bernard J. Fundamentals of fluid film lubrication. 2nd ed. New York: Marcel Dekker, 2004.

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Book chapters on the topic "Elastohydrodynamical lubrication"

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Bonneau, Dominique, Aurelian Fatu, and Dominique Souchet. "Elastohydrodynamic Lubrication." In Hydrodynamic Bearings, 159–84. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781119004769.ch4.

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Zhu, Dong. "Elastohydrodynamic Lubrication (EHL)." In Encyclopedia of Tribology, 874–89. Boston, MA: Springer US, 2013. http://dx.doi.org/10.1007/978-0-387-92897-5_624.

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Wang, Q. Jane, and Dong Zhu. "Plasto-Elastohydrodynamic Lubrication (PEHL)." In Interfacial Mechanics, 415–49. First edition. | Boca Raton, FL : CRC Press/Taylor & Francis Group, 2019.: CRC Press, 2019. http://dx.doi.org/10.1201/9780429131011-12.

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Zhu, Dong, and Q. Jane Wang. "EHL History (Elastohydrodynamic Lubrication)." In Encyclopedia of Tribology, 832–47. Boston, MA: Springer US, 2013. http://dx.doi.org/10.1007/978-0-387-92897-5_625.

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Ren, Ning, Q. Jane Wang, and Dong Zhu. "Plasto-Elastohydrodynamic Lubrication (PEHL)." In Encyclopedia of Tribology, 2525–38. Boston, MA: Springer US, 2013. http://dx.doi.org/10.1007/978-0-387-92897-5_1189.

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Wang, Q. Jane, and Dong Zhu. "Lubrication in Counterformal Contacts—Elastohydrodynamic Lubrication (EHL)." In Interfacial Mechanics, 183–250. First edition. | Boca Raton, FL : CRC Press/Taylor & Francis Group, 2019.: CRC Press, 2019. http://dx.doi.org/10.1201/9780429131011-7.

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Zhu, Dong, and Ning Ren. "Roughness Effect on Elastohydrodynamic Lubrication." In Encyclopedia of Tribology, 2955–67. Boston, MA: Springer US, 2013. http://dx.doi.org/10.1007/978-0-387-92897-5_663.

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Hsiao, Hsing-Sen S., Bernard J. Hamrock, Shashi K. Sharma, and John H. Tripp. "Transition from Elastohydrodynamic to Partial Lubrication." In Tribology Issues and Opportunities in MEMS, 207–28. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5050-7_16.

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Jin, Zhong Min. "Elastohydrodynamic Lubrication of Natural Synovial Joints." In Encyclopedia of Tribology, 889–92. Boston, MA: Springer US, 2013. http://dx.doi.org/10.1007/978-0-387-92897-5_1268.

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Friedman, Avner. "The Mathematical Treatment of Cavitation in Elastohydrodynamic Lubrication." In The IMA Volumes in Mathematics and Its Applications, 139–44. New York, NY: Springer New York, 1988. http://dx.doi.org/10.1007/978-1-4615-7399-9_19.

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Conference papers on the topic "Elastohydrodynamical lubrication"

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Barbieri, Marco, and Francesco Pellicano. "Coupling of Two EHL-Lubricated Contacts in Gear Dynamics." In STLE/ASME 2010 International Joint Tribology Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ijtc2010-41237.

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In this paper, the effect of vibrations on the elastohydrodynamical lubrication in spur gear pairs will be described. The relevance of inertial effects on film fluid lubrication is clarified by means of comparisons with static formulations. The multilevel technique is used to solve the transient EHL problem for elliptical contacts. Coupling with load balance equation and with different equations of motion is studied. A new model describing the dynamic behavior of two coupled transient EHL elliptical contacts is developed and applied to characterize the dynamics of a spur gear pair.
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Kim, Seongsu, Juhwan Choi, Sungsoo Rhim, and Jin Hwan Choi. "Numerical Modeling and Analysis of Piston Lubrication for Flexible Bodies Through Elastohydrodynamics and Modal Reduction Method." In ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/detc2017-67299.

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An analysis for operating characteristics of piston lubrication system is performed based on the numerical model in the area of fluid-structure interaction. A numerical model with an integration of elastohydrodynamics and multi-flexible-body dynamics (MFBD) is developed to analyze lubrication characteristics such as oil film thickness and pressure. In particular, elastic deformation of components in piston lubrication system through modal reduction method is reflected on elastohydrodynamic analysis. The oil film pressure evaluated from elastohydrodynamic analysis is used as external force to calculate the elastic deformation of flexible bodies in multi-flexible-body dynamics (MFBD) again. A series of process proposed in this study is available for the analysis of realistic elastohydrodynamic lubrication phenomenon. Moreover, asperity contact effect is also implemented. Finally, a numerical example for the piston lubrication system is also demonstrated.
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Hartinger, Markus, David Gosman, Stathis Ioannides, and Hugh A. Spikes. "CFD Modelling of Elastohydrodynamic Lubrication." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63840.

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Traditionally the problem of elastohydrodynamic lubrication (EHL) has been solved using the Reynolds equations for fluid flow. In this paper we explore the finite volume method (FVM) to model fluid behaviour in rolling-element bearing systems. The effect of cavitation is modelled with a barotropic cavitation model. We investigate two cases with a cylinder on a flat plate, one under rolling and one under sliding conditions. These solutions are compared to the Reynolds-EHL approach. Towards higher loads, stability problems are encountered and strategies for dealing with these are discussed.
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Olver, A. V., R. Glovnea, J. W. Choo, and H. A. Spikes. "Elastohydrodynamic Lubrication of Multiple Periodic Ridges." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63802.

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The lubrication of rolling contacts in which one surface has a roughness consisting of periodic transverse or longitudinal ridges has been widely investigated, both theoretically, by, for example, Venner, Lubrecht, Greenwood, Snidle and Evans [1–4] and by means of experiments [5–7]. The problem is relevant to the lubrication of machined surfaces which have a strong periodic element of roughness.
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Shah, Paras, Zissimos P. Mourelatos, and Prashant Patel. "Piston Secondary Dynamics Considering Elastohydrodynamic Lubrication." In SAE World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2007. http://dx.doi.org/10.4271/2007-01-1251.

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Peide, Bao, Xie Jun, Yin Xiaoqin, Yang Qizhi, and Ma Luzhong. "Elastohydrodynamic lubrication design of internal gear transmission." In 2011 International Conference on Consumer Electronics, Communications and Networks (CECNet). IEEE, 2011. http://dx.doi.org/10.1109/cecnet.2011.5768745.

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Bao Peide, Xie Jun, Yin Xiaoqin, Yang Qizhi, and Ma Luzhong. "Elastohydrodynamic Lubrication research on Planetary Gear Transmission." In 2011 International Conference on New Technology of Agricultural Engineering (ICAE). IEEE, 2011. http://dx.doi.org/10.1109/icae.2011.5943751.

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8

Sheriff, Jamaluddin Md, Kahar Osman, Suriani Binti Che Kar, and Asral. "Pressure Analysis In Point Contact For Elastohydrodynamic lubrication." In 5TH NATIONAL CONFERENCE ON THERMOPHYSICAL PROPERTIES: (NCTP‐09). American Institute of Physics, 2010. http://dx.doi.org/10.1063/1.3464886.

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Abbes, Miloud Tahar, Patrick Maspeyrot, Ahmed Dekkiche, Mohamed Benbrik, and Fouad Boukli Hacène. "Elastohydrodynamic Piston Skirt Lubrication: Effect on Tribological Performances." In ASME/STLE 2012 International Joint Tribology Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ijtc2012-61129.

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A model of elastohydrodynamic lubrication of piston skirt is developed in this paper. The secondary motion of the piston, the lubrication and the elastic deformations of skirt and cylinder are described by a transient strongly nonlinear system coming from the coupling of the dynamics equations of piston secondary motion and the Reynolds equation. The iterative Newton-Raphson method in conjunction with Murty’s algorithm for cavitation was used to solve the problem. An optimum skirt curved profile, which maintain piston in optimum performance characteristics, is adopted. Using the tribological performance of the lubricated skirt-cylinder, the results — minimum oil-film thickness, maximum pressure in the lubricant film and friction — are compared to the elastohydrodynamic solution and the rigid skirt-cylinder solution. The effect of elastic deformation of both skirt and cylinder show that elastohydrodynamic analysis is necessary for an accurate prediction of a piston-cylinder performance. The computational work, applied to a solid skirt piston of a V-8 direct injection diesel engine truck, should be a powerful design analysis tool, which can be used to increase the available engine power through optimum piston performance characteristics.
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Huang, Hai-zhou, Xi-chuan Niu, and Xiao-yang Yuan. "Thermal Elastohydrodynamic Lubrication Analysis for Point Contact Transmission." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-10567.

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To investigate the thermal EHL (elastohydrodynamic lubrication) in point contact transmission, a model considering the two-dimensional surface velocity of tooth face and the running-in is proposed. The numerical solutions for pressure, temperature and film thickness distribution in the contact zone are obtained by solving equations including the Reynolds, Energy and the elastic displacement with variable dimension meshing method. The model was used to study the point contact transmission of the circular arc gear in a windlass. The main results show that it is pure rolling along the direction of tooth width, and the rolling speed plays a leading role in improving the lubricating performance and transmission efficiency of circular arc gear. The squeeze film effect makes the pressure peak tend to be gentle and the film thickness increase slightly.
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Reports on the topic "Elastohydrodynamical lubrication"

1

Gunsel, Selda, and Michael Pozebanchuk. Elastohydrodynamic Lubrication with Polyolester Lubricants and HFC Refrigerants, Final Report, Volume 1. Office of Scientific and Technical Information (OSTI), April 1999. http://dx.doi.org/10.2172/8212.

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2

Gunsel, Selda, and Michael Pozebanchuk. Elastohydrodynamic Lubrication with Polyolester Lubricants and HFC Refrigerants, Final Report, Volume 2. Office of Scientific and Technical Information (OSTI), April 1999. http://dx.doi.org/10.2172/8217.

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