... )]. Studies have noted that co-sliding motion took place between the transfer layer on the ball and the film, and the velocity accommodation mode, interfacial sliding, and low interfacial shear strength resulted in low friction [( 10 )]. The discussions above on contact mechanisms during sliding wear...

... with the further increase in the nondimensional slip coefficient ( A ) from 10 to 100. slider bearing journal bearing partial slip surface single-groove pressure shear stress 18 12 2008 12 09 2009 10 11 2009 10 11 2009 machine bearings shear strength slip...

... lubricants oils pH rolling shear strength viscosity water 2010 American Society of Mechanical Engineers ...

..., depending on x = m f d / m f p values 27 04 2009 25 08 2009 09 11 2009 09 11 2009 aluminium alloys billets dies (machine tools) extrusion finite element analysis friction lubricating oils shear strength surface roughness tip test...

...Yeau-Ren Jeng; Shin-Rung Peng The friction coefficient ( μ ) of a contact surface with elliptical asperities is examined at various values of the plasticity index ( ψ ) , the effective radius ratio ( γ ) , the shear-strength-pressure proportionality constant ( c ) , and the dimensionless limiting...

... rolling contact fatigue bearing life contact stresses elastic moduli fatigue finite element analysis Gaussian distribution grain size rolling bearings shear strength Weibull distribution 19 06 2008 30 09 2008 04 03 2009 Furuma , K. , Shirota , S...

...W. Wayne Chen; Q. Jane Wang The relative motion between two surfaces under a normal load is impeded by friction. Interfacial junctions are formed between surfaces of asperities, and sliding inception occurs when shear tractions in the entire contact area reach the shear strength of the weaker...

... different size deep groove ball bearings run under varying loads and speeds. 23 10 2007 23 06 2008 07 08 2008 ball bearings elasticity friction lubricants polymers rolling bearings shear strength slip torque rolling bearing ball bearing polymer lubricant running...

... ⟩ = ln ( 1 + 1 ∕ D 0 ) − 1 ∕ ( 1 + D 0 ) ⟨ w D − 3 ⟩ = 1 2 D 0 ( 1 + D 0 ) 2 } biological tissues biomechanics elastic deformation electrohydrodynamics friction lung pneumodynamics shear deformation shear strength...

... with low shear strength. The dual lubrication mechanisms make boron-nitride-silicone lubricants suitable for a wide range of aluminum forging temperatures. The formulated lubricants boron-nitride-silicone-1 and boron-nitride-silicone-2, together with graphite and silicone oil lubricants (Table 1...

... is less than 1 ∕ 20 of the contact area diameter. The mean tangential stress over the contact interface at sliding inception was found to be slightly below the shear strength of the sphere material, justifying the full stick contact condition assumed in Ref. 6 for dry contact. Two distinct...

...) friction granular materials lubrication shear strength surface roughness In order to study the behavior of the granular material and the effect of the surface roughness on the friction coefficient and the displacement, several patterns of roughness need to be investigated. Previous results...

... be calculated by summing up the two components, i.e., the boundary friction contributed by contacting asperities and the shear stress in hydrodynamic regions. The frictions from asperity contact were determined in terms of a limiting shear stress or shear strength of boundary films while the fluid shear stress...

... contacts and elastic–fully plastic deformation models. Numerical integration yields solutions for the normal and friction forces in terms of fractal parameters, elastic–plastic material properties, and interfacial shear strength. The variation of the static coefficient of friction with normal load...

... the oil film pressure and the slip velocity. It is found that wall slip causes the oil film thickness to decrease dramatically. The initial limiting shear strength and proportional constant of the viscoplastic lubricant have a larger effect on the oil film pressure than the rolling speed...

... of friction. These components of the friction force depend on the relevant real area of contact (dependent on roughness and mechanical properties) and relevant shear strength during sliding. A model of rough surface topography based on an empirical power rule for scale dependence of roughness and contact...

... JOURNAL OF TRIBOLOGY . Manuscript received by the Tribology Division September 11, 2002; revised manuscript received March 13, 2003. Associate Editor: J. A. Tichy. 11 September 2002 13 March 2003 13 01 2004 carbon fibre reinforced plastics wear shear strength compressive...

... received by the Tribology Division August 1, 2002; revised manuscript received February 4, 2003. Associate Editor: T. C. Ovaert. 01 August 2002 04 February 2003 25 09 2003 sliding friction Young's modulus shear strength simulation mechanical contact rough surfaces surface...

... oil film thickness decreases with a factor of the order 2 NS going from the inlet to the outlet of the Hertzian contact. That is only possible when the local shear strength of the lubricant is at least as high as the local shear stress. An added sliding motion for the lubricated rolling surfaces...

... that lump growth can be decreased and, under certain conditions prevented, by a higher (surface) hardness of the workpiece, a lower roughness of the tool surface, a lower nominal contact pressure, and a lower shear strength of the interface. These results are in general agreement with results obtained from...