An explanation of the different regimes of friction and wear using asperity deformation models

Challen, John; Oxley, P.L.B.

doi:10.1016/0043-1648(79)90080-2

Cited by 505 publications

(258 citation statements)

References 10 publications

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“…The tests described above have shown how the wear mass is proportional to the concentration and sliding distance. It is possible, therefore, to write a relation for the wear volume, V; (5) where N is the number of particles which become entrained into the contact, A c is the embedded cross sectional area of a particle, d is the distance each particle slides, and f is the material removal factor defined by equation (2).…”

Section: Discussionmentioning

confidence: 99%

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An investigation into the mechanisms of closed three-body abrasive wear

Dwyer-Joyce

Sayles

Ιωαννίδης

1994

Wear

118

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Section: Discussionmentioning

confidence: 99%

“…Models have been developed using slip line field solutions to determine material flow around sliders [5,6]; these can, however, only model plastic flow for a 2D indentor.…”

Section: Introductionmentioning

confidence: 99%

An investigation into the mechanisms of closed three-body abrasive wear

Dwyer-Joyce

Sayles

Ιωαννίδης

1994

Wear

118

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“…The other proposed approach is based on the slip-line model [34]. In this concept, the frictional force originated by the sliding of a hard relatively smooth surface over a softer one can be assumed as the force needed to push layers of plastically deformed material along the soft surface ahead of asperities on the hard surface.…”

Section: Wear Force Componentmentioning

confidence: 99%

Wear-dependent specific coefficients in a mechanistic model for turning of nickel-based superalloy with ceramic tools

Lacalle

Urbikaín

Fernández-Valdivielso

et al. 2017

Open Engineering

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Difficult to cut materials such as nickel and titanium alloys are used in the aeronautical industry, the former alloys due to its heat-resistant behavior and the latter for the low weight -high strength ratio. Ceramic tools made out alumina with reinforce SiC whiskers are a choice in turning for roughing and semifinishing workpiece stages. Wear rate is high in the machining of these alloys, and consequently cutting forces tends to increase along one operation. This paper establishes the cutting force relation between work-piece and tool in the turning of such difficult-to-cut alloys by means of a mechanistic cutting force model that considers the tool wear effect. The cutting force model demonstrates the force sensitivity to the cutting engagement parameters (ap, f) when using ceramic inserts and wear is considered. Wear is introduced through a cutting time factor, being useful in real conditions taking into account that wear quickly appears in alloys machining. A good accuracy in the cutting force model coefficients is the key issue for an accurate prediction of turning forces, which could be used as criteria for tool replacement or as input for chatter or other models.

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“…Connections created at the level of asperities are sources of energy dissipation. For most solids shear strength of the third body is equal to [15,16,17]. Once known these parameters, the mean real pressure ( r p ), can be determined analiticaly and also the molecular adhesion coefficient:…”

Section: Theoretical Model For Calculating the Coefficient Of Frictiomentioning

confidence: 99%

“…It is noted that the deformations are elastic at a maximum inclination angle of o 16 from which the coefficient of adhesion is 5 , 0 f  . When the angle of inclination of the asperity exceeds a critical value ( cr  ), the microchipping [11,15,16] occurs. Figure 4 shows the evolution of the critical slope of the asperity, depending on the coefficient of molecular adhesion ( f ) for the materials specificated in Table 1 and also, (Ce) is the coefficients of strain hardening (strengthening by cold plastic deformation).…”

Section:  Comparison Of Estimated Coefficient Of Frictionmentioning

confidence: 99%

The Phenomenological Analysis of the Nature of the Friction, From Theoretical and Experimental Point of View of Al-Al2o3-Graphite Composite /Cast Iron „pin on Disc” Sliding System

2017

IJOMAM

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-The theoretical and experimental researches on developing of friction coupling materials that are part of the disc-pad braking systems of vehicle and analysis the tribological behavior of them, has been in the spotlight of the specialists in this field in the past decades. Explaining the phenomena that occur at the level of friction surfaces in relative motion have become increasingly complex and often contradictory. Consequently, in this paper was studied the dry sliding wear behavior and friction coefficient evolution of Al-Al2O3-Graphite composite /cast iron system. The proposed theoretical model analyze how the friction coefficient is influenced by different factors as: (a) the adhesion coefficient, (b) the deformation of the material during friction and (c) the inclination angle of the microasperity resulting from the friction process for metal-metal or metal-ceramic coupling in general and aluminum based composite / cast iron couple in particular. For the experimental part we used AlZn6MgCu as aluminium matrix (in cast and age hardening state) reinforced with different proportion of graphite and/ or Al2O3 ceramic particles.The composite samples are tribological tested on cast iron disc (300HB hardness) at room temperature using a pin on disc machine, at contact pressure of 3.5 and 7.5 x 10 -1 MPa and sleeding speed of 3.8 m/s under dry sliding conditions.

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An explanation of the different regimes of friction and wear using asperity deformation models

Cited by 505 publications

References 10 publications

An investigation into the mechanisms of closed three-body abrasive wear

An investigation into the mechanisms of closed three-body abrasive wear

Wear-dependent specific coefficients in a mechanistic model for turning of nickel-based superalloy with ceramic tools

The Phenomenological Analysis of the Nature of the Friction, From Theoretical and Experimental Point of View of Al-Al2o3-Graphite Composite /Cast Iron „pin on Disc” Sliding System

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