Computational micro- and macroscopic models of contact and friction: formulation, approach and applications

Tworzydlo, W. W.; Cecot, Witold; Oden, J. T.; Yew, Ching H.

doi:10.1016/s0043-1648(98)00194-x

Cited by 78 publications

(31 citation statements)

References 37 publications

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“…Several friction models of rough surfaces have been proposed in the past [11][12][13][14][15]. Recently, Brizmer et al [16] proposed a new model for the static friction coefficient for a single deformable asperity in contact with a rigid flat based on the assumption that the contact interface is under stick condition (frictional contact).…”

Section: Friction Modelmentioning

confidence: 99%

The influence of operating and design parameters on the magnetic tape/guide friction coefficient

2006

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The classical belt drive equation is modified to obtain a more accurate model, which allows the investigation of the effect of various parameters such as sliding speed, tape tension, surface roughness, material properties and guide and tape geometry on the magnetic tape/guide friction coefficient. The friction coefficient between a guide and a tape sample is also determined from experimental measurements as a function of these various parameters. Theoretical predictions and experimental results are compared.

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Section: Friction Modelmentioning

confidence: 99%

The influence of operating and design parameters on the magnetic tape/guide friction coefficient

2006

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“…Tworzydlo et al [25] evaluated the static friction coefficient between similar rough metallic surfaces assuming that the resistance to sliding was caused primarily by shearing of junctions formed between contacting asperities (similar to the aforementioned model of Bowden and Tabor [21]). The shear strength of the junctions was assumed to be independent of the normal pressure and equal to the shear strength of the bulk material.…”

Section: Introductionmentioning

confidence: 99%

Elastic–plastic spherical contact under combined normal and tangential loading in full stick

2006

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The behavior of an elastic-plastic contact between a deformable sphere and a rigid flat under combined normal and tangential loading with full stick contact condition is investigated theoretically. Sliding inception is treated as a plastic yield failure mechanism, which allows static friction modeling under highly adhesive conditio ns. Several contact parameters such as: junction tangential stiffness, static friction force and static friction coefficient are extensively investigated. The phenomenon of junction growth and the evolution of the plastic zone in the contact region are briefly described. It is found that at low normal dimensionless loads the static friction coefficient decreases sharply with increasing normal load, in breach with the classical laws of friction. As the normal load further increases the static friction coefficient approaches a constant value that is about 0.3 for many material properties combinations.

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“…According to the welding, shearing, and ploughing theory, the friction force is attributed to two components: the adhesion component and the deformation component. For rough engineering surfaces, the adhesion effect can be neglected, Tworzydlo et al [20]. The welding, shearing, and ploughing theory is the basis for the nonclassical friction laws.…”

Section: Advances In Tribologymentioning

confidence: 99%

“…According to this theory, the frictional stress is composed of two components: adhesion and grooving components. For rough engineering surfaces, the adhesion effect can be neglected [20]. Moreover, the contact interface is composed of two zones: microslip and macroslip zones.…”

Section: Statement Of the Problemmentioning

confidence: 99%

Effect of the Material Parameters on Layered Viscoelastic Frictional Contact Systems

Mahmoud

El-Shafei

Alshorbagy

et al. 2010

Advances in Tribology

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In the design process, one of the main targets is to reduce the peak values of the contact stresses. This can be attained by layering the contacting bodies by layers of different material characteristics. Viscoelastic materials are characterized by either a stress relaxation or a creep deformation; therefore, the contacting bodies can be layered with such materials to attain this target. This paper discusses effects of the material characteristics of viscoelastic layers upon the unbounded contact configuration. Three material parameters are considered: the layer/contact solids stiffness ratio, the delayed/instantaneous elasticity ratio, and the material relaxation time. The results are obtained by using a two-dimensional time-dependent nonlinear computational model, developed by the authors, capable of analyzing quasistatic viscoelastic frictional contact problems.

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Computational micro- and macroscopic models of contact and friction: formulation, approach and applications

Cited by 78 publications

References 37 publications

The influence of operating and design parameters on the magnetic tape/guide friction coefficient

The influence of operating and design parameters on the magnetic tape/guide friction coefficient

Elastic–plastic spherical contact under combined normal and tangential loading in full stick

Effect of the Material Parameters on Layered Viscoelastic Frictional Contact Systems

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