The Density of Gaps in the Seal Joint in Elastic Contact of Microasperities

DOI

10.2991/mic-15.2015.40How to use a DOI?

Keywords

rough surface, spherical asperity, elastic contact of asperities, volume of gaps, density of joint, thin-layer coatings, layered elastic half-space.

Abstract

Initially, a contact between a rigid rough surface and a homogeneous elastic half-space without taking into account the mutual influence of microasperities is considered. To determine the dependence of the density of gaps in the joint on dimensionless the force elastic geometrical parameter, the discrete roughness model presented by microasperities in the form of equal spherical segments with the height distribution corresponding to the bearing profile curve of the real surface is used. To determine the volume of intercontact space, the volumes of gaps attributable to the single contacting or noncontacting asperities are determined. In this case the equations describing the sections of surfaces of contacting or noncontacting asperities and the half-space under load are used. Then we consider a contact between a rigid rough surface and a layered half-space consisted of the coating with thickness 1 and the substrate. By using the stiffness model of a layered half-space, the elastic characteristic are determined for every contacting asperity. The system of transcendental equations which allow to determine the dependence of the density of gaps in case of contact through coating layer on the roughness parameters, material properties, coating thickness and applied load is given. The characteristic curves showing the dependence of the density of gaps in the joint for different coating thickness are given.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - P.M. Ogar
AU  - D.B. Gorokhov
AU  - A.S. Kozhevnikov
PY  - 2015/08
DA  - 2015/08
TI  - The Density of Gaps in the Seal Joint in Elastic Contact of Microasperities
BT  - Proceedings of the 2nd International Conference on Modelling, Identification and Control
PB  - Atlantis Press
SP  - 177
EP  - 180
SN  - 1951-6851
UR  - https://doi.org/10.2991/mic-15.2015.40
DO  - 10.2991/mic-15.2015.40
ID  - Ogar2015/08
ER  -