On rolling friction

Иванов, А. П.

doi:10.31857/s0869-56524853295-299

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…) and equations (1)-( 6), all exhibitions of friction and wear may be reduced conventionally at least to two basically different states: the first state defines all types of damage and wear, the second -the so-called "wearless" condition. The state of damage and wear is characterized by the components of energy balance (1)- (6), which are responsible for accumulation of internal energy in deformed…”

Section: Brief Structural-energy Balance Laws Of Frictionmentioning

confidence: 99%

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Analysis of the Energy Balance of Friction on the Rolling Contact

Федоров¹

2021

Tribol. Ind.

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The state of elastic rolling of the wheel is considered as a special manifestation of the highly developed evolution of the plastic contact of rolling friction. It is shown that for the material point of contact of smooth rolling surfaces, their initial elasticity forms a pair of elastic roughnesses -the sliding friction model. The Carter's diagram is analyzed and its interpretation is given as an analog of the metal tension curve. This diagram is transformed to a structural-energy diagram of the sliding friction coefficient (evolution) of the rubbing surfaces. The conclusion is made about the mutual generality of the Carter's equation and the equation of the energy balance of friction. The evolution of the structure of the rolling contact to the ideal nano-state, adequate to the state of the ideal solid, is justified. The possibility of the existence of an almost ideal thermodynamic cycle at the rolling contact and the maximum efficiency of the energy transformation is shown. In this state, we make up one mechanical (nano) quantum of the self-organized dynamic dissipative structure of the elementary friction contact with minimal contact shift (creep). This actually determines the real performance characteristics of the heavy-loaded Hertz contact of real engineering systems.

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Section: Brief Structural-energy Balance Laws Of Frictionmentioning

confidence: 99%

“…The art of the wheel and, accordingly, the rolling friction of solid elastic bodies is widely used in modern practice (gears, rolling bearings, wheelrail system, and others [1][2][3][4][5][6]). For example, studies of rolling friction of the wheel-rail system in the railway industry are indicative [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Energy Balance of Friction on the Rolling Contact

Федоров¹

2021

Tribol. Ind.

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Adaptation of the Jellett Integral to the Case of Rolling Friction

Borisov

Иванов

2020

Dokl. Phys.

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Calculation of the Coefficient of Free Rolling Resistance for the Wheel With Deformable Rim

CHERNOUS

Codnyanko²

2022

Transport Engineering

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A new method for calculating rolling resistance is developed. This method includes a simplified structural model of a wheel in the form of a rigid cylinder with a thin viscoelastic rim. The wheel loading mode is considered in the absence of shearing (horizontal) force. In the entire contact area, it is assumed that the wheel is gripped with a non-deformable support surface. Deformation of the viscoelastic layer is analyzed on the basis of the Winkle model. In contrast to the previously known ones, the proposed method implies a description of the symmetry breaking in the distribution of contact pressure when a small torque is applied to the wheel, not exceeding the rolling resistance at rest. Contact pressure diagrams are obtained at different values of the torque applied to the wheel. It is shown that as the torque increases, the maximum value of the contact pressure increases, and the position of this maximum shifts in the direction of possible rolling. From the condition of violating the contact area dimensions at the beginning of rolling, an analytical expression is derived for the moment of rolling resistance at rest. The calculated dependence of this moment on the wheel draft is compared with known experimental data. When describing stationary free rolling, the asymmetry of the contact pressure corresponding to the beginning of rolling and the loss of energy during deformation of the viscoelastic material of the wheel rim are taken into account. The dependences of the coefficient of rolling resistance and wheel draft on the speed of the wheel center of mass at a fixed value of the vertical load are obtained. It is shown that taking into account the initial asymmetry of the contact pressure leads to a more intensive increase in the calculated estimates of the resistance coefficient and a less marked decrease in the wheel draft with an increase in rolling speed.

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On rolling friction

Cited by 3 publications

References 7 publications

Analysis of the Energy Balance of Friction on the Rolling Contact

Analysis of the Energy Balance of Friction on the Rolling Contact

Adaptation of the Jellett Integral to the Case of Rolling Friction

Calculation of the Coefficient of Free Rolling Resistance for the Wheel With Deformable Rim

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