Influence of Asperity Deformation Mode on Gas Leakage between Contacting Surfaces
- 1 October 1969
- journal article
- research article
- Published by SAGE Publications in Journal of Mechanical Engineering Science
- Vol. 11 (5) , 534-549
- https://doi.org/10.1243/jmes_jour_1969_011_065_02
Abstract
The gas flow between two surfaces in contact is affected by the way in which the surface asperities are deformed by the contact load. The plastic deformation of wedge-shaped model asperities, supported on rigid bases, is examined. Full account is taken of the effect of displaced material on the deformation pressure and on the rate of fluid leakage between the contacting surfaces. Characteristics of deformation pressure versus compression are plotted for a range of wedge asperity angles, assuming two-dimensional deformation and non-hardening material, and from these are derived expressions for fluid leakage between the contacting surfaces. It is shown that a critical contact pressure exists for a given seal contact load at which the leakage rate has a maximum value. This contact pressure may be avoided by either increasing or decreasing the seal length.Keywords
This publication has 8 references indexed in Scilit:
- Damping Inserts in Vibrating StructuresJournal of Mechanical Engineering Science, 1969
- Chatter in Horizontal MillingProceedings of the Institution of Mechanical Engineers, 1964
- A theoretical and experimental relationship between the leakage of gases through the interface of two metals in contact and their superficial micro-geometryVacuum, 1964
- A Critical Introduction to Some Industrial Resonance Testing TechniquesJournal of Mechanical Engineering Science, 1963
- Estimation of Upper Bound Loads for Extrusion and Coining OperationsProceedings of the Institution of Mechanical Engineers, 1959
- Some Factors Influencing the Area-Load Characteristics for Semismooth Contiguous Surfaces Under “Static” LoadingTransactions of the American Society of Mechanical Engineers, 1958
- The Influence of Surface Roghness on the Mechanism of Contact between Metal SurfacesTransactions of the Japan Society of Mechanical Engineers, 1955
- A Plastic-Flow Problem Arising in the Theory of Discontinuous MachiningTransactions of the American Society of Mechanical Engineers, 1954