pdf numerical modelling of lubricated foil rolling

Dynamic Behaviors of the Elastohydrodynamic Lubricated ...

Dec 26, 2012· The dynamic behaviors of a single elastohydrodynamic lubricated (EHL) contact between a rolling element and raceways under wider load and speed ranges are analyzed numerically based on the transient EHL model and the free vibration model. The discrete convolution and fast fourier transform method is implemented in order to increase the ...

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Solid Mechanics - Mechanical Engineering - Purdue University

Dynamics of ball and rolling element bearings and rotating systems Friction induced vibration and squeal in dry contacts Friction and wear of dry and lubricated contacts Virtual tribology Dry and lubricated fretting wear MEMS for in-situ monitoring of tribological contacts Discrete element modeling Design

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Three-Dimensional DEM Modelling of Ball Bearing with ...

The numerical simulations performed with MULTICOR-3D software on an operating ball bearing shown that the lubrication regime at the rolling element-raceway contact can be easily monitored and quantitatively identified. To assess the efficiency of the discrete modelling, a parametric study is .

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Fluid–Structure Interaction Modeling of Elastohydrodynamically Lubricated .

The FSI model is robust, easy to implement, and computationally efficient. It provides an effective approach to solve sophisticated EHL problems. The FSI model was used to investigate the effects of surface dents, plasticity and material inclusions under heavily loaded lubricated line contacts as can be found in gears and rolling element bearings.

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A robust model for rolling of thin strip and foil

Secondly the regime of roll deformation (e.g. whether there is a central #at region) has to be identi"ed before starting the calculation so that appropriate numerical techniques can be applied. These de"ciencies need to be overcome before friction modelling, which plays a key role in foil rolling, can be successfully coupled into the problem.

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[PDF] CFD Modelling of Elastohydrodynamic Lubrication | .

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 .

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MODELLING HIGH TEMPERATURE ROLLING TEXTURES OFFCC .

212 Cl. MAURICEETAL. (Bacroix and Jonas, 1988b) and (ii) a Sachs type RCmodel in which the grain TD/RDshear is completely relaxed (Hirsch and Liicke, 1988). Neither explana- tion is totally free from criticism. Non-octahedral slip has been observed at low strain rates, <10-3S-1, butnot, as yet, at the highstrain rates, >10s-1, typical of industrial hot rolling schedules. ...

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Finite element based simulation of dry sliding wear

Modeling and Simulation of Cage Wear in Solid-Lubricated Rolling Bearings Rahul Dahiwal et al-Fretting fatigue under variable amplitude loading considering partial and gross slip regimes: Numerical analysis A.L. Pinto et al-This content was downloaded from IP address 207.46.13.52 on 16/05/2020 at 02:56

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The Behavior of Indentation Marks in Rolling–Sliding ...

rolling bearings was presented by Ai and Nixon (19).Theyde-veloped a model to predict a life reduction factor in rolling bear-ings as a function of the dent geometry (dent slope: diameter and depth) and the operating conditions in the bearing, including lu-brication. The model .

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Effect of roughness in cold metal rolling

based on the numerical simulations of flow by Patir and Cheng [13, 14]. Figure 4. Change in roughness spectrum during industrial cold rolling of aluminium [10]. 3.1. Multi-scale model of rolling Le and Sutcliffe have developed a series of models to model lubricated rolling, based on coupling the asperity deformation with a lubricant entrainment ...

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Real-Time Modeling of Thermal Interactions in Cryogenic ...

While thermal interactions in oil-lubricated rolling bearings in gas turbine engines are important to ensure acceptable material and lubricant behavior, realistic modeling of contact heat generation at the rolling element to race contacts is significant in maintaining the liquid state of the cryogenic fluid

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Frottement et lubrification en mise en forme = Numerical ...

Frottement et lubrification en mise en forme = Numerical ...

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Modelling of Surface Crack Growth under Lubricated Rolling ...

The paper describes modelling approach to computational simulation of surface crack growth subjected to lubricated rolling–sliding contact conditions. The model considers the size and orientation of the initial crack, normal and tangential loading due to rolling–sliding contact and the influence of fluid trapped inside the crack by a hydraulic pressure mechanism.

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Numerical Analysis of the Anisotropic Stiffness of a Thin ...

Numerical analysis have been performed on tensile test experiment data toevaluated the performances of a 9 microns thick aluminium foil. The identification of theanisotropic material properties is based on tensile tests performed in 11 different anglesfrom 0 to 90 from the rolling direction. By least square fitting and extrapolation tozero load the elastic modulus is, as opposed to the general ...

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Modelling and experimental validation of lubricating ...

separation will be a highly valuable tool in the design of lubricated systems as well as enabling tailor made greases for different applications. In this paper the potential of combined analytical modelling, flow visualizations, and numerical modelling in grease flow dynamics is presented.

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Industrial Lubrication and Tribology: Vol. 72 Iss. 10 ...

Numerical model of two-phase mechanical face seal with shallow grooves based on finite volume method Wenbin Gao, Weifeng Huang, Tao Wang, Ying Liu, Zhihao Wang, Yuming Wang. By modeling and analyzing the two-phase mechanical seal of the fan-shaped groove end face, which is prone to phase change, an effective method to study the flow field of.

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Industrial Lubrication and Tribology: Vol. 72 Iss. 10 | Emerald Insight

Numerical model of two-phase mechanical face seal with shallow grooves based on finite volume method Wenbin Gao, Weifeng Huang, Tao Wang, Ying Liu, Zhihao Wang, Yuming Wang. By modeling and analyzing the two-phase mechanical seal of the fan-shaped groove end face, which is prone to phase change, an effective method to study the flow field of.

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The Behavior of Indentation Marks in Rolling–Sliding .

rolling bearings was presented by Ai and Nixon (19).Theyde-veloped a model to predict a life reduction factor in rolling bear-ings as a function of the dent geometry (dent slope: diameter and depth) and the operating conditions in the bearing, including lu-brication. The model was then experimentally verified (Ai and

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On the Stability of Balanced Rigid Rotors in Air Foil Bearings

A rigid rotor model and a reduced model of air foil bearings are introduced, coupled and solved simultaneously. The rotor and bearing structure models are kept simple, while the fluid model is reduced, aiming for time efficient numerical simulations to investigate fundamental physics, mainly the influence of bearing compliancy on the rotor

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Numerical analysis of aerodynamic lubricated double-decked ...

models are crucial to predict the performance of foil bearings accurately (Andrés, 2009). Up to now, many numerical models have been developed to provide theoretical reference and guidance. Feng and Kaneko (2009) presented a mathematical model for multi wound foil bearings, which considered the effect of temperature on gas viscosity.

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The Parametric Study of the Crack Growth in the Lubricated Rolling-Sliding Contact Problems .

A two-dimensional numerical model is used to describe the crack path in the lubricated rolling-sliding contact problems. The model assumes that the crack is initiated in a pre-existing micro pit, which resulted from the crack growth on the surface of a gear tooth flank. The lubricated rolling-sliding contact problem is modelled using the Hertz theory of contact, the Coulomb's .

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Modelling the foil rolling process | QUT ePrints

A review of the main rolling models is conducted to assess their suitability for modelling the foil rolling process. Two such models are Fleck and Johnson's Hertzian model and Fleck, Johnson, Mear and Zhang's Influence Function model. Both of these models are approximated through the use of perturbation methods.

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Lubricants | Free Full-Text | Numerical Modeling of Wear ...

Increasing efforts to reduce frictional losses and the associated use of low-viscosity lubricants lead to machine elements being operated under mixed lubrication. Consequently, wear effects are also gaining relevance. Appropriate numerical modeling and predicting wear in a reliable manner offers new possibilities for identifying harmful operating conditions or for designing running-in procedures.

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Rolling of Thin Strip and Foil: Application of a Tribological HR .

foil model. A friction model is applied to foil rolling by Keife and Jonsater @17#. The roll bite model follows the work by Fleck and Johnson @18#. The inlet lubricant film thickness is estimated by a simplified model for smooth roll and strip by Johnson @2# and used to evalu-ate the lubricant shear stress. The contact ratio of the surface

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All About Tribology

Numerical Model for Hydration-Lubricated Contact and Its Friction Behavior at Nanoscale "Push and Pull": Biomechanics of the Pollination Apparatus of Oncidium spp. Friction Influenced by Vibrations: A Refined Contact-Mechanics View on Lateral and Rotational Oscillations

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Modelling Transient Behavior of a Mechanical System ...

Modelling Transient Behavior of a Mechanical System Including a Rolling and Sliding Contact ... "Friction models for sliding dry, boundary and mixed lubricated contacts," Proc. of Nordtrib 2004-the 11 th Nordic Symposium on Tribology, Tromso¨-Harstad-Hurtigrutten ... A numerical method for real clastic contacts subjected to normal and ...

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Journal of System Design and Dynamics

A Numerical Calculation Model of Multi Wound Foil Bearing with the Effect of Foil ... to be the best substitutions of the rolling elements bearings and oil-lubricated bearings. However, at present, the applications of foil bearings mainly rely on an experimental build ... 4.1 Geometry Model of Foil .

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(PDF) Modelling lubricated revolute joints in multibody mechanical .

Further, the methodology is easy and straightforward to implement in a computational code because resultant forces due to the fluid action are in explicit form.The model presented throughout this paper can be used to predict the dynamic response of the machines and mechanisms having lubricated revolute clearance joints.Numerical difficulties ...

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EFFECT OF MISALIGNMENT ON THE DURABILITY OF GAS .

2.3 Model of the bump foil Modeling foil gas bearings is a troublesome problem mainly because of the difficulties encountered when calculating the deformation of the compliant bearing under the developed hydrodynamic pressure. Several important approaches were introduced to model the structural stiffness of bump-type foil bearings.

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Materials Science - Swerim

• Rolling (cold, temper, foil and profile rolling) • Sheet metal forming (bending, pressing and roll forming) • Levelling (long products and sheet/coil) • Punching, shearing and slitting • Grinding Both commercial multiphysics programs and proprietary software are used for modelling .

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Experimental and Numerical Investigation of Cavitating .

With the progress in numerical modeling of cavitating flows, high-end numerical simulations have become a useful ... foil is placed in the cavitation tunnel with 5° angle of attack. The foil has a chord length of 100 mm and span length ... a rolling motion due to the interaction between the re-entrant jet and the bulk flow. As the cloud cavity ...

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