Contact area of rough surfaces

Kragelsky, I V; Demkin, N. B.

doi:10.1016/0043-1648(60)90136-8

Cited by 69 publications

(7 citation statements)

References 2 publications

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“…Surface asperities of the sliding bodies are subject to elastic, elastic-plastic, and plastic mechanisms of deformation. 26,27 The temperature of discrete zones of rough surfaces during frictional heating is termed the flash temperature. 9 During the plastic deformation, one of the materials of the friction couple has noticeably smaller hardness, rigidity, and roughness.…”

Section: Flash Temperaturementioning

confidence: 99%

Finite element solution of the three-dimensional system of equations of heat dynamics of friction and wear during single braking

Grześ

2018

Advances in Mechanical Engineering

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A three-dimensional numerical model of a disk brake to study temperature on a discrete contact of rough surfaces has been developed. It includes the system of equations formulated based on thermotribological postulates of heat dynamics of friction and wear with mutual influence of contact pressure, velocity, properties of materials, and temperature. Two approaches of calculation of the flash temperature and its influence on the maximum temperature during a single braking application were studied. Changes in the contact temperature, sliding velocity, and the thermomechanical wear during braking were shown and discussed. It was found that two of the examined variants of calculation of the flash temperature agree well for the three considered materials of the brake pads combined with the cast iron disk, at each initial sliding velocity in the range from 5 to 20 m s 21 .

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Section: Flash Temperaturementioning

confidence: 99%

Finite element solution of the three-dimensional system of equations of heat dynamics of friction and wear during single braking

Grześ

2018

Advances in Mechanical Engineering

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“…One can also note the works by Kragelsky and Demkin [23], O'Callaghan and Cameron [24], Bush et al [25].…”

Section: Introductionmentioning

confidence: 92%

A new algorithm for solving the multi-indentation problem of rigid bodies of arbitrary shapes on a viscoelastic half-space

Kozhevnikov

Duhamel

Yin

et al. 2010

International Journal of Mechanical Sciences

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International audienceIn this paper the contact problem between rigid indenters of arbitrary shapes and a viscoelastic half-space is considered. Under the action of a normal force the penetration of the indenters changes and a few contact areas appeared. We wish to find the relations which link the pressure distribution, the resultant forces on the indenters and the penetration on the assumption that the surfaces are frictionless. For indenters of arbitrary shapes the problem may be solved numerically by using the matrix inversion method, extended to viscoelastic cases [1]. But when the problem involves a large number of points the matrix inversion method can become very time-consuming. Here the problem is solved using an alternative scheme, called the two-scale iterative method. In this method the local matrix inversion method is used at the micro-scale for each contact area to compute the pressure distribution taking into account interacting effect (the forces on the other contact areas which can be calculated at the macro-scale) between indenters. Two algorithms were proposed. The first algorithm takes into account the distribution of forces on the other contact areas and the second is the approximation of the first algorithm and takes into account the resultant forces on the other contact areas. The method was implemented for a simple configuration of seven spherical indenters, seven spherical-ended cylindrical indenters and seven flat-ended cylindrical indenters as well as for a more complex configuration of 12 randomly positioned indenters of arbitrary shapes: spherical-ended cylindrical, flat-ended cylindrical, conical and cylindrical indenters (finite cylindrical shape with its curved face). This last case is more difficult as the indenting geometry does not have an axisymmetric profile. For all these cases the two-scale iterative method permits to find the pressure distribution and the contact forces versus the penetration. It can be validated by comparing the numerical results to the numerical results obtained with the matrix inversion method

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“…The majority of proposed models deal with the assumption of ideally smooth contacting surfaces. However, the boundaries of real bodies are not perfectly smooth, they are characterized by the surface structure, the main components of which are roughness and waviness [1,2]. Generally, these components are considered separately in the formulation of contact problems.…”

Section: Introduction and Problem Formulationmentioning

confidence: 99%

Plane contact problems involving frictional heating for wavy half-space

Pauk

2006

Tribol Lett

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Contact problems of a rigid punch sliding over the wavy thermoelastic half-space are studied. The punch geometry is considered to be parabolic or flat-ended. It is assumed that the contact between bodies occurs within a finite number of separated contour areas. The frictional heating in these regions is involved. The problem is reduced to the non-linear system of algebraic equations, which is solved iteratively. The effects of the boundary waviness on the heat generation are studied and presented in diagrams.

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Contact area of rough surfaces

Cited by 69 publications

References 2 publications

Finite element solution of the three-dimensional system of equations of heat dynamics of friction and wear during single braking

Finite element solution of the three-dimensional system of equations of heat dynamics of friction and wear during single braking

A new algorithm for solving the multi-indentation problem of rigid bodies of arbitrary shapes on a viscoelastic half-space

Plane contact problems involving frictional heating for wavy half-space

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